US20130259709A1 - Oil pump control system for vehicle and operation method thereof - Google Patents
Oil pump control system for vehicle and operation method thereof Download PDFInfo
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- US20130259709A1 US20130259709A1 US13/588,680 US201213588680A US2013259709A1 US 20130259709 A1 US20130259709 A1 US 20130259709A1 US 201213588680 A US201213588680 A US 201213588680A US 2013259709 A1 US2013259709 A1 US 2013259709A1
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- United States
- Prior art keywords
- oil
- oil pressure
- adjustment valve
- oil pump
- pressure adjustment
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
- Y10T137/85986—Pumped fluid control
Definitions
- Exemplary embodiments of the present invention relate to an oil pump control system for a vehicle; and, particularly, to an oil pump control system for a vehicle, which controls an oil pump to adjust the oil pressure of an engine lubrication system, and an operation method thereof.
- a conventional oil pump control system for a vehicle includes one or two chambers, and controls the oil pressure of an engine lubrication system using a mechanical spring constant and a pressure applied to the chambers.
- the conventional oil pump control system for a vehicle performs control using only a fixed oil pressure, according to such a mechanical control method. Therefore, when the conventional oil pump control is applied to a diesel engine at low engine RPM, the efficiency thereof decreases.
- the conventional oil pump control system has a kind of trade-off between a variable start point of a pump and a maximum oil pressure. Therefore, when the variable start point of an oil pressure is set to a low pressure, it is difficult to adjust the oil pressure during full load, and when the oil pressure during full load is adjusted, the variable start point of the oil pressure increases. Accordingly, the fuel efficiency decreases.
- Various aspects of the present invention are directed to providing an oil pump control system for a vehicle, which is capable of improving the fuel efficiency of an engine by actively controlling a flow rate of an oil pump using engine RPM and internal temperature variables of an oil temperature sensor or engine control unit (ECU).
- ECU engine control unit
- an oil pump control system for a vehicle may include an oil pump to form a pressure for supplying oil to an engine, an oil pressure adjustment valve fluid-connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, an oil sensor to sense the pressure and an temperature of the oil supplied to the engine, and a controller to monitor a vehicle information inputted from outside and the pressure and the temperature sensed by the oil sensor, wherein the controller determines a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and control the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
- the oil pump may include a first chamber connected to an oil pump outlet fluid-connecting to the engine and a second chamber connected to the oil pressure adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- the oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
- the oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
- the controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined first target oil pressure value.
- the controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that a monitored oil pressure follows a determined first target oil pressure value.
- the controller When an oil temperature sensing function of the oil sensor is abnormal as a result of monitoring, the controller performs a second mode in which the controller determines a second target oil pressure value based on the engine RPM, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined second target oil pressure valve.
- the controller When at least one of an oil pressure sensing function of the oil sensor and the function of the oil pressure adjustment valve is abnormal as a result of monitoring, the controller performs a third mode in which the controller deactivates a control function for the oil pressure adjustment valve.
- the oil pump operates as a mechanical variable oil pump.
- the target oil pressure value is determined by a first map in which the target oil pressure value is predetermined for the engine RPM and the oil temperature.
- the target oil pressure value of the first map is decided by linear interpolation.
- the oil sensor is constructed to may have both of an oil pressure sensing function and an oil temperature sensing function or may have any one of the oil pressure sensing function and the oil temperature sensing function.
- an operation method of an oil pump control system for a vehicle which may include an oil pump to form a pressure for supplying oil to an engine and an oil pressure adjustment valve connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, the operation method including monitoring a vehicle information inputted from outside and an oil pressure and an oil temperature sensed by an oil sensor, determining a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and controlling the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
- the operation method may further include monitoring whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, performing a first mode in which a first target oil pressure value is determined based on the engine RPM and the oil temperature and the oil pressure adjustment valve is controlled such that the monitored oil pressure follows a determined first target oil pressure value.
- the oil pump may include a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- the oil pump may include a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- the oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
- the oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
- FIG. 1 is a block diagram of an oil pump control system for a vehicle in accordance with various exemplary embodiments of the present invention.
- FIG. 2 is a block diagram of a controller in a first mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 3 is a state diagram of an oil pressure adjustment valve in the first mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 4 is a graph showing oil pressures in the first mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 5 is another state diagram of the oil pressure adjustment valve in the first mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 6 is another graph showing oil pressures in the first mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 7 is a block diagram of the controller in a second mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 8 is a state diagram of the oil pressure adjustment valve in the second mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 9 is a graph of oil pressures in the second mode in accordance with the various exemplary embodiments of the present invention.
- FIG. 10 is an operation state diagram explaining an operation method of the oil pump control system for a vehicle in accordance with the various exemplary embodiments of the present invention.
- FIG. 11 is a block diagram of an oil pump control system for a vehicle in accordance with various exemplary embodiments of the present invention.
- FIG. 12 is a graph showing effects in accordance with the exemplary embodiments of the present invention.
- FIG. 1 is a block diagram of the oil pump control system for a vehicle in accordance with the first embodiment of the present invention.
- the oil pump control system 100 for a vehicle in accordance with the first embodiment of the present invention may include an oil pump 110 , an oil pressure adjustment valve 120 , an oil sensor 130 , and a controller 140 .
- the oil pump 110 pumps oil of an oil pan, and discharges the pumped oil to an oil pump outlet 112 .
- the oil pump 110 performs a function of forming a pressure for supplying oil to an engine E.
- the oil pump 110 may include a first chamber 114 connected to the oil pump outlet 112 and a second chamber 116 connected to the oil pressure adjustment valve 120 to control the internal pressure thereof.
- the oil pressure control valve 120 may include a three-port two-way solenoid valve having a P port connected to a first branch D 1 diverging from the oil pump outlet 112 , an A port connected to the second chamber 116 , and a T port connected to the oil pan.
- the pressure of oil supplied through the first branch D 1 is used as a pressure source of the oil pressure adjustment valve 120 .
- the oil sensor 130 senses the pressure and temperature of oil supplied to the engine E through a main gallery M, and transfers the sensed pressure and temperature to the controller 140 . Furthermore, the oil sensor 130 checks whether its function is normal or not, and transfers the check result to the controller 130 .
- the oil sensor 130 may have an oil pressure sensing function for sensing the pressure of oil, an oil temperature sensing function for sensing the temperature of oil, and a function of determining whether the oil sensor 130 is normal or not.
- the oil sensor 130 may be constructed to include both of the oil pressure sensing function and the oil temperature sensing function or include only any one of the functions.
- the controller 140 controls overall operations of the oil pump control system 100 for a vehicle in accordance with the first embodiment of the present invention.
- the controller 140 monitors vehicle information inputted from outside and the oil pressure and temperature sensed by the oil sensor 130 , calculates a target oil pressure value based on an engine RPM of the monitored vehicle information and the oil temperature, and controls the oil pressure adjustment valve 120 such that the monitored oil pressure follows the calculated target oil pressure value.
- the controller 140 may be included in an engine control unit (ECU) or provided as a separate module.
- controller 140 may monitor whether the oil sensor 130 and the oil pressure adjustment valve 120 are normal or not, and operate in three modes according to the monitoring result.
- the controller 140 operates in a first mode.
- the controller 140 controls the pressure of oil supplied to the engine E based on the engine RPM and the oil temperature.
- the first mode corresponds to a normal mode of the oil pump control system 100 for a vehicle in accordance with the first embodiment of the present invention.
- the controller 140 may include a first map 142 and a first PID control module 144 , in order to perform the first mode.
- a first target oil pressure value may be calculated by the first map 142 in which a target oil pressure value is previously decided for the engine RPM and the oil pressure.
- the first PID control module 144 controls the oil pressure adjustment valve 120 such that the monitored oil pressure follows the calculated first target oil pressure value.
- the oil pressures of the first chamber 114 , the second chamber 116 , and the main gallery M may be represented as shown in FIG. 4 .
- the oil flows from the P port to the A port and from the A port to the P port of the oil pressure relief value 120 .
- the target oil pressure value which is previously set in the first map 142 may be decided by linear interpolation.
- the oil pressures of the first chamber 114 , the second chamber 116 , and the main gallery M may be represented as shown in FIG. 6 .
- the controller 140 operates in a second mode.
- the controller 140 controls the pressure of the oil supplied to the engine E based on the engine RPM.
- the second mode corresponds to an operation mode which is performed when the oil temperature sensing function corresponding to a partial function of the oil sensor 130 of the oil pump control system 100 in accordance with the first embodiment of the present invention is out of order.
- the controller 140 may include a second curve 146 and a second PID control module 148 , in order to perform the second mode.
- a second target oil pressure value may be calculated by the second curve 146 in which a target oil pressure value is previously decided for the engine RPM.
- the second PID control module 148 controls the oil pressure adjustment valve 120 such that the monitored oil pressure follows the calculated second target oil pressure value.
- the oil flows from the P port to the A port and from the A port to the P port of the oil pressure adjustment valve 120 .
- the target oil pressure value preset in the second curve 146 may be decided by linear interpolation.
- the first map 142 is a two-dimensional map where the engine RPM and the oil pressure are set to input values, whereas the second curve 146 is a one-dimensional curve function where the engine PPM is set to an input value.
- the oil pressures of the first chamber 114 , the second chamber 116 , and the main gallery M may be represented as shown in FIG. 6 .
- the controller 140 operates in a third mode.
- the controller 140 may deactivate a control function for the oil pressure adjustment valve 120 .
- the oil pressures of the first chamber 114 , the second chamber 116 , and the main gallery M may be represented as shown in FIG. 9 .
- FIG. 10 is a state diagram based on the above-described three operation modes. Referring to FIG. 10 , an operation method of the oil pump control system 100 for a vehicle in accordance with the exemplary embodiment of the present invention will be described.
- the controller 140 continuously monitors whether the oil sensor 130 and the oil pressure adjustment valve 120 are normal or not, and selectively performs the first mode S 1 , the second mode S 2 , and the third mode S 3 according to the monitoring result.
- the controller 140 immediately performs the first mode S 1 .
- the controller 140 transits to the first mode S 1 as shown in FIG. 10 .
- the controller 140 immediately performs the second mode S 2 .
- the controller 140 transits to the second mode S 2 as shown in FIG. 10 .
- the controller 140 immediately performs the third mode S 3 .
- the controller 140 transits to the third mode S 3 as shown in FIG. 10 .
- the oil pump control system 200 for a vehicle in accordance with the second embodiment of the present invention may include an oil pump 210 , an oil pressure adjustment valve 220 , an oil sensor 230 , and a controller 240 .
- the oil pump 210 pumps oil of an oil pan, and discharges the pumped oil to an oil pump outlet 212 .
- the oil pump 210 performs a function of forming a pressure for supplying oil to an engine E.
- the oil pump 210 may include a first chamber 214 connected to the oil pump outlet 212 and a second chamber 216 connected to the oil pressure adjustment valve 220 to control the internal pressure thereof.
- the oil pressure relief value 220 may include a three-port two-way solenoid valve which has a P port connected to a second branch D 2 diverging from a main gallery M, an A port connected to the second chamber 216 , and a T port connected to the oil pan.
- the pressure of oil supplied through the second branch D 2 is used as a pressure source of the oil pressure adjustment valve 220 .
- the pressure source of the oil pressure adjustment valve 220 is connected to the main gallery M, unlike the oil pump control system 100 in accordance with the first embodiment of the present invention.
- the oil pump control systems 100 and 200 for a vehicle in accordance with the exemplary embodiments of the present invention may actively control the oil pressure to a desired level, as shown in FIG. 12 . Therefore, since the oil pump control systems 100 and 200 may reduce the oil pressure to a desired level (high-temperature full-load level) in a state where the oil temperature is low, a driving torque required for oil pressure/flow rate formation may be reduced to thereby improve engine fuel efficiency.
- the oil pump control systems 100 and 200 for a vehicle in accordance with the exemplary embodiments of the present invention operate in the same manner as a mechanical one-stage variable oil pump with a relief valve. Therefore, the oil pump control systems 100 and 200 have an advantage in terms of fail safety.
- the oil pump control system for a vehicle and the operation method thereof may actively control the flow rate of the oil pump using the engine RPM and the internal temperature variables of the oil temperature sensor or the controller, thereby improving the fuel efficiency of the engine.
Abstract
An oil pump control system for a vehicle includes: an oil pump to form a pressure for supplying oil to an engine, an oil pressure adjustment valve to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, an oil sensor to sense the pressure and temperature of the oil supplied to the engine, and a controller to monitor vehicle information inputted from outside and the oil pressure and temperature sensed by the oil sensor, determine a target oil pressure value based on engine RPM of the monitored vehicle information and the oil temperature, and control the oil pressure adjustment valve such that the monitored oil pressure follows the determined target oil pressure value.
Description
- The present application claims priority to Korean Patent Application No. 10-2012-0030958, filed on Mar. 27, 2012, the entire contents of which is incorporated herein for all purposes by this reference.
- 1. Field of the Invention
- Exemplary embodiments of the present invention relate to an oil pump control system for a vehicle; and, particularly, to an oil pump control system for a vehicle, which controls an oil pump to adjust the oil pressure of an engine lubrication system, and an operation method thereof.
- 2. Description of Related Art
- A conventional oil pump control system for a vehicle includes one or two chambers, and controls the oil pressure of an engine lubrication system using a mechanical spring constant and a pressure applied to the chambers.
- The conventional oil pump control system for a vehicle performs control using only a fixed oil pressure, according to such a mechanical control method. Therefore, when the conventional oil pump control is applied to a diesel engine at low engine RPM, the efficiency thereof decreases.
- Furthermore, the conventional oil pump control system has a kind of trade-off between a variable start point of a pump and a maximum oil pressure. Therefore, when the variable start point of an oil pressure is set to a low pressure, it is difficult to adjust the oil pressure during full load, and when the oil pressure during full load is adjusted, the variable start point of the oil pressure increases. Accordingly, the fuel efficiency decreases.
- The information disclosed in this Background of the Invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
- Various aspects of the present invention are directed to providing an oil pump control system for a vehicle, which is capable of improving the fuel efficiency of an engine by actively controlling a flow rate of an oil pump using engine RPM and internal temperature variables of an oil temperature sensor or engine control unit (ECU).
- Other objects and advantages of the present invention can be understood by the following description, and become apparent with reference to the embodiments of the present invention. Also, it is obvious to those skilled in the art to which the present invention pertains that the objects and advantages of the present invention can be realized by the means as claimed and combinations thereof.
- In an aspect of the present invention, an oil pump control system for a vehicle, may include an oil pump to form a pressure for supplying oil to an engine, an oil pressure adjustment valve fluid-connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, an oil sensor to sense the pressure and an temperature of the oil supplied to the engine, and a controller to monitor a vehicle information inputted from outside and the pressure and the temperature sensed by the oil sensor, wherein the controller determines a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and control the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
- The oil pump may include a first chamber connected to an oil pump outlet fluid-connecting to the engine and a second chamber connected to the oil pressure adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- The oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
- The oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
- The controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined first target oil pressure value.
- The controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that a monitored oil pressure follows a determined first target oil pressure value.
- When an oil temperature sensing function of the oil sensor is abnormal as a result of monitoring, the controller performs a second mode in which the controller determines a second target oil pressure value based on the engine RPM, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined second target oil pressure valve.
- When at least one of an oil pressure sensing function of the oil sensor and the function of the oil pressure adjustment valve is abnormal as a result of monitoring, the controller performs a third mode in which the controller deactivates a control function for the oil pressure adjustment valve.
- The oil pump operates as a mechanical variable oil pump.
- The target oil pressure value is determined by a first map in which the target oil pressure value is predetermined for the engine RPM and the oil temperature.
- The target oil pressure value of the first map is decided by linear interpolation.
- The oil sensor is constructed to may have both of an oil pressure sensing function and an oil temperature sensing function or may have any one of the oil pressure sensing function and the oil temperature sensing function.
- In another aspect of the present invention, an operation method of an oil pump control system for a vehicle, which may include an oil pump to form a pressure for supplying oil to an engine and an oil pressure adjustment valve connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, the operation method including monitoring a vehicle information inputted from outside and an oil pressure and an oil temperature sensed by an oil sensor, determining a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and controlling the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
- The operation method may further include monitoring whether the oil sensor and the oil pressure adjustment valve are normal or not, and when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, performing a first mode in which a first target oil pressure value is determined based on the engine RPM and the oil temperature and the oil pressure adjustment valve is controlled such that the monitored oil pressure follows a determined first target oil pressure value.
- When an oil temperature sensing function of the oil sensor is abnormal as a result of monitoring, performing a second mode in which a second target oil pressure value is determined based on the engine RPM and the oil pressure adjustment valve is controlled such that the monitored oil pressure follows a determined second target oil pressure value.
- When at least one of an oil pressure sensing function of the oil sensor and the function of the oil pressure adjustment valve is abnormal as a result of monitoring, performing a third mode in which a control function for the oil pressure adjustment valve is deactivated.
- The oil pump may include a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- The oil pump may include a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
- The oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
- The oil pressure adjustment valve may include a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
- The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.
-
FIG. 1 is a block diagram of an oil pump control system for a vehicle in accordance with various exemplary embodiments of the present invention. -
FIG. 2 is a block diagram of a controller in a first mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 3 is a state diagram of an oil pressure adjustment valve in the first mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 4 is a graph showing oil pressures in the first mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 5 is another state diagram of the oil pressure adjustment valve in the first mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 6 is another graph showing oil pressures in the first mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 7 is a block diagram of the controller in a second mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 8 is a state diagram of the oil pressure adjustment valve in the second mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 9 is a graph of oil pressures in the second mode in accordance with the various exemplary embodiments of the present invention. -
FIG. 10 is an operation state diagram explaining an operation method of the oil pump control system for a vehicle in accordance with the various exemplary embodiments of the present invention. -
FIG. 11 is a block diagram of an oil pump control system for a vehicle in accordance with various exemplary embodiments of the present invention. -
FIG. 12 is a graph showing effects in accordance with the exemplary embodiments of the present invention. - It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment.
- In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
- Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
- Exemplary embodiments of the present invention will be described below in more detail with reference to the accompanying drawings. The present invention may, however, be embodied in different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. Throughout the disclosure, like reference numerals refer to like parts throughout the various figures and embodiments of the present invention.
- Referring to
FIG. 1 , an oil pump control system for a vehicle in accordance with a first embodiment of the present invention will be described.FIG. 1 is a block diagram of the oil pump control system for a vehicle in accordance with the first embodiment of the present invention. - The oil
pump control system 100 for a vehicle in accordance with the first embodiment of the present invention may include anoil pump 110, an oilpressure adjustment valve 120, anoil sensor 130, and acontroller 140. - The
oil pump 110 pumps oil of an oil pan, and discharges the pumped oil to anoil pump outlet 112. Theoil pump 110 performs a function of forming a pressure for supplying oil to an engine E. - In the present exemplary embodiment of the present invention, the
oil pump 110 may include afirst chamber 114 connected to theoil pump outlet 112 and asecond chamber 116 connected to the oilpressure adjustment valve 120 to control the internal pressure thereof. - The oil
pressure control valve 120 may include a three-port two-way solenoid valve having a P port connected to a first branch D1 diverging from theoil pump outlet 112, an A port connected to thesecond chamber 116, and a T port connected to the oil pan. In this case, the pressure of oil supplied through the first branch D1 is used as a pressure source of the oilpressure adjustment valve 120. - The
oil sensor 130 senses the pressure and temperature of oil supplied to the engine E through a main gallery M, and transfers the sensed pressure and temperature to thecontroller 140. Furthermore, theoil sensor 130 checks whether its function is normal or not, and transfers the check result to thecontroller 130. - That is, the
oil sensor 130 may have an oil pressure sensing function for sensing the pressure of oil, an oil temperature sensing function for sensing the temperature of oil, and a function of determining whether theoil sensor 130 is normal or not. Theoil sensor 130 may be constructed to include both of the oil pressure sensing function and the oil temperature sensing function or include only any one of the functions. - The
controller 140 controls overall operations of the oilpump control system 100 for a vehicle in accordance with the first embodiment of the present invention. Thecontroller 140 monitors vehicle information inputted from outside and the oil pressure and temperature sensed by theoil sensor 130, calculates a target oil pressure value based on an engine RPM of the monitored vehicle information and the oil temperature, and controls the oilpressure adjustment valve 120 such that the monitored oil pressure follows the calculated target oil pressure value. Thecontroller 140 may be included in an engine control unit (ECU) or provided as a separate module. - Furthermore, the
controller 140 may monitor whether theoil sensor 130 and the oilpressure adjustment valve 120 are normal or not, and operate in three modes according to the monitoring result. - As a result of monitoring, when the functions of the
oil sensor 130 and the oilpressure adjustment valve 120 are normal, thecontroller 140 operates in a first mode. In the first mode, thecontroller 140 controls the pressure of oil supplied to the engine E based on the engine RPM and the oil temperature. The first mode corresponds to a normal mode of the oilpump control system 100 for a vehicle in accordance with the first embodiment of the present invention. - Referring to
FIG. 2 , thecontroller 140 may include afirst map 142 and a firstPID control module 144, in order to perform the first mode. A first target oil pressure value may be calculated by thefirst map 142 in which a target oil pressure value is previously decided for the engine RPM and the oil pressure. The firstPID control module 144 controls the oilpressure adjustment valve 120 such that the monitored oil pressure follows the calculated first target oil pressure value. - Referring to
FIG. 3 , when the pressure of oil supplied to the engine E is controlled to a low pressure in the first mode, the oil flows from the P port to the A port of the oilpressure adjustment valve 120. Accordingly, when the pressure of the oil supplied to the engine E is controlled to a low pressure in the first mode, the oil pressures of thefirst chamber 114, thesecond chamber 116, and the main gallery M may be represented as shown inFIG. 4 . - Referring to
FIG. 5 , when the pressure of the oil supplied to the engine E is controlled to the first target oil pressure value calculated by thefirst map 142 in the first mode, the oil flows from the P port to the A port and from the A port to the P port of the oilpressure relief value 120. The target oil pressure value which is previously set in thefirst map 142 may be decided by linear interpolation. - Accordingly, when the pressure of the oil supplied to the engine E is controlled to the first target oil pressure value in the first mode, the oil pressures of the
first chamber 114, thesecond chamber 116, and the main gallery M may be represented as shown inFIG. 6 . - As a result of monitoring, when the oil temperature sensing function of the
oil sensor 130 is abnormal, thecontroller 140 operates in a second mode. In the second mode, thecontroller 140 controls the pressure of the oil supplied to the engine E based on the engine RPM. The second mode corresponds to an operation mode which is performed when the oil temperature sensing function corresponding to a partial function of theoil sensor 130 of the oilpump control system 100 in accordance with the first embodiment of the present invention is out of order. - Referring to
FIG. 7 , thecontroller 140 may include asecond curve 146 and a secondPID control module 148, in order to perform the second mode. A second target oil pressure value may be calculated by thesecond curve 146 in which a target oil pressure value is previously decided for the engine RPM. The secondPID control module 148 controls the oilpressure adjustment valve 120 such that the monitored oil pressure follows the calculated second target oil pressure value. - Referring to
FIG. 5 , when the pressure of the oil supplied to the engine E is controlled to the second target oil pressure value calculated by thesecond curve 146 in the second mode, the oil flows from the P port to the A port and from the A port to the P port of the oilpressure adjustment valve 120. The target oil pressure value preset in thesecond curve 146 may be decided by linear interpolation. Thefirst map 142 is a two-dimensional map where the engine RPM and the oil pressure are set to input values, whereas thesecond curve 146 is a one-dimensional curve function where the engine PPM is set to an input value. - Accordingly, when the pressure of the oil supplied to the engine E is controlled to the second target oil pressure value in the second mode, the oil pressures of the
first chamber 114, thesecond chamber 116, and the main gallery M may be represented as shown inFIG. 6 . - As a result of monitoring, when at least any one of the oil pressure sensing function of the
oil sensor 130 and the function of the oilpressure adjustment valve 120 is abnormal, thecontroller 140 operates in a third mode. In the third mode, thecontroller 140 may deactivate a control function for the oilpressure adjustment valve 120. - Referring to
FIG. 8 , when the pressure of the oil supplied to the engine E is set to a maximum pressure to turn off the control and electronic control function in the third mode, the oil flows from the A port to the T port of the oilpressure adjustment valve 120, and is then discharged to the oil pan. - Accordingly, when the pressure of the oil supplied to the engine E is set to the maximum pressure to turn off the control and electronic control function in the third mode, the oil pressures of the
first chamber 114, thesecond chamber 116, and the main gallery M may be represented as shown inFIG. 9 . -
FIG. 10 is a state diagram based on the above-described three operation modes. Referring toFIG. 10 , an operation method of the oilpump control system 100 for a vehicle in accordance with the exemplary embodiment of the present invention will be described. - Referring to
FIG. 10 , when the initialization of the system is completed in a state where the engine E is operated, thecontroller 140 continuously monitors whether theoil sensor 130 and the oilpressure adjustment valve 120 are normal or not, and selectively performs the first mode S1, the second mode S2, and the third mode S3 according to the monitoring result. - For example, as a result of monitoring, when the functions of the
oil sensor 130 and the oilpressure relief value 120 are normal in the initial state of the system, thecontroller 140 immediately performs the first mode S1. When the functions of theoil sensor 130 and the oilpressure relief value 120 are normal in a state where the system is performing the second or third mode S2 or S3, thecontroller 140 transits to the first mode S1 as shown inFIG. 10 . - Furthermore, as a result of monitoring, when the oil temperature sensing function of the
oil sensor 130 is abnormal in the initial state of the system, thecontroller 140 immediately performs the second mode S2. When the oil temperature sensing function of theoil sensor 130 is abnormal in a state where the system is performing the first or third mode S1 or S3, thecontroller 140 transits to the second mode S2 as shown inFIG. 10 . - Furthermore, as a result of monitoring, when at least any one of the oil pressure sensing function of the
oil sensor 130 and the function of the oilpressure adjustment valve 120 is abnormal in the initial state of the system, thecontroller 140 immediately performs the third mode S3. When at least any one of the oil pressure sensing function of theoil sensor 130 and the function of the oilpressure adjustment valve 120 is abnormal in a state where the system is performing the second or third mode S2 or S3, thecontroller 140 transits to the third mode S3 as shown inFIG. 10 . - Hereinafter, referring to
FIG. 11 , an oilpump control system 200 for a vehicle in accordance with a second embodiment of the present invention will be described. The oilpump control system 200 for a vehicle in accordance with the second embodiment of the present invention may include anoil pump 210, an oilpressure adjustment valve 220, anoil sensor 230, and acontroller 240. - The
oil pump 210 pumps oil of an oil pan, and discharges the pumped oil to anoil pump outlet 212. Theoil pump 210 performs a function of forming a pressure for supplying oil to an engine E. - In the present exemplary embodiment of the present invention, the
oil pump 210 may include afirst chamber 214 connected to theoil pump outlet 212 and asecond chamber 216 connected to the oilpressure adjustment valve 220 to control the internal pressure thereof. - The oil
pressure relief value 220 may include a three-port two-way solenoid valve which has a P port connected to a second branch D2 diverging from a main gallery M, an A port connected to thesecond chamber 216, and a T port connected to the oil pan. In this case, the pressure of oil supplied through the second branch D2 is used as a pressure source of the oilpressure adjustment valve 220. - In the oil
pump control system 200 in accordance with the second embodiment of the present invention, the pressure source of the oilpressure adjustment valve 220 is connected to the main gallery M, unlike the oilpump control system 100 in accordance with the first embodiment of the present invention. - The oil
pump control systems FIG. 12 . Therefore, since the oilpump control systems - Furthermore, although a fail occurs in the electronic control system, the oil
pump control systems pump control systems - In accordance with the exemplary embodiments of the present invention, the oil pump control system for a vehicle and the operation method thereof may actively control the flow rate of the oil pump using the engine RPM and the internal temperature variables of the oil temperature sensor or the controller, thereby improving the fuel efficiency of the engine.
- The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and their practical application, to thereby enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.
Claims (20)
1. An oil pump control system for a vehicle, comprising:
an oil pump to form a pressure for supplying oil to an engine;
an oil pressure adjustment valve fluid-connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump;
an oil sensor to sense the pressure and an temperature of the oil supplied to the engine; and
a controller to monitor a vehicle information inputted from outside and the pressure and the temperature sensed by the oil sensor, wherein the controller determines a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and control the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
2. The oil pump control system of claim 1 , wherein the oil pump includes a first chamber connected to an oil pump outlet fluid-connecting to the engine and a second chamber connected to the oil pressure adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
3. The oil pump control system of claim 2 , wherein the oil pressure adjustment valve includes a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
4. The oil pump control system of claim 2 , wherein the oil pressure adjustment valve includes a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
5. The oil pump control system of claim 1 , wherein the controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and
when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined first target oil pressure value.
6. The oil pump control system claim 2 , wherein the controller monitors whether the oil sensor and the oil pressure adjustment valve are normal or not, and
when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, the controller performs a first mode in which the controller determines a first target oil pressure value based on the engine RPM and the oil pressure, and controls the oil pressure adjustment valve such that a monitored oil pressure follows a determined first target oil pressure value.
7. The oil pump control system of claim 6 , wherein, when an oil temperature sensing function of the oil sensor is abnormal as a result of monitoring, the controller performs a second mode in which the controller determines a second target oil pressure value based on the engine RPM, and controls the oil pressure adjustment valve such that the monitored oil pressure follows a determined second target oil pressure valve.
8. The oil pump control system of claim 7 , wherein, when at least one of an oil pressure sensing function of the oil sensor and the function of the oil pressure adjustment valve is abnormal as a result of monitoring, the controller performs a third mode in which the controller deactivates a control function for the oil pressure adjustment valve.
9. The oil pump control system of claim 8 , wherein the oil pump operates as a mechanical variable oil pump.
10. The oil pump control system of claim 1 , wherein the target oil pressure value is determined by a first map in which the target oil pressure value is predetermined for the engine RPM and the oil temperature.
11. The oil pump control system of claim 10 , wherein the target oil pressure value of the first map is decided by linear interpolation.
12. The oil pump control system of claim 1 , wherein the oil sensor is constructed to have both of an oil pressure sensing function and an oil temperature sensing function or have any one of the oil pressure sensing function and the oil temperature sensing function.
13. An operation method of an oil pump control system for a vehicle, which includes an oil pump to form a pressure for supplying oil to an engine and an oil pressure adjustment valve connected to the oil pump to control a pressure of the oil supplied to the engine by controlling the pressure formed by the oil pump, the operation method comprising:
monitoring a vehicle information inputted from outside and an oil pressure and an oil temperature sensed by an oil sensor;
determining a target oil pressure value based on an engine RPM of a monitored vehicle information and the oil temperature, and controlling the oil pressure adjustment valve such that a monitored oil pressure follows a determined target oil pressure value.
14. The operation method of claim 13 , further including:
monitoring whether the oil sensor and the oil pressure adjustment valve are normal or not; and
when functions of the oil sensor and the oil pressure adjustment valve are normal as a result of monitoring, performing a first mode in which a first target oil pressure value is determined based on the engine RPM and the oil temperature and the oil pressure adjustment valve is controlled such that the monitored oil pressure follows a determined first target oil pressure value.
15. The operation method of claim 14 , further including, when an oil temperature sensing function of the oil sensor is abnormal as a result of monitoring, performing a second mode in which a second target oil pressure value is determined based on the engine RPM and the oil pressure adjustment valve is controlled such that the monitored oil pressure follows a determined second target oil pressure value.
16. The operation method of claim 14 , further including, when at least one of an oil pressure sensing function of the oil sensor and the function of the oil pressure adjustment valve is abnormal as a result of monitoring, performing a third mode in which a control function for the oil pressure adjustment valve is deactivated.
17. The operation method of claim 13 , wherein the oil pump includes a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
18. The operation method of claim 14 , wherein the oil pump includes a first chamber connected to an oil pump outlet fluid-communicating to the engine and a second chamber connected to the oil adjustment valve, wherein an internal pressure of the second chamber is controlled by the oil pressure adjustment valve.
19. The operation method of claim 18 , wherein the oil pressure adjustment valve includes a three-port two-way solenoid valve having a P port connected to a first branch diverging from the oil pump outlet, an A port connected to the second chamber, and a T port connected to an oil pan.
20. The operation method of claim 18 , wherein the oil pressure adjustment valve includes a three-port two-way solenoid valve having a P port connected to a second branch diverging from a main gallery connected to the first chamber, an A port connected to the second chamber, and a T port connected to an oil pan.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20120030958A KR20130109323A (en) | 2012-03-27 | 2012-03-27 | Oil pump control system for vehicle and operation method thereof |
KR10-2012-0030958 | 2012-03-27 |
Publications (1)
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US20130259709A1 true US20130259709A1 (en) | 2013-10-03 |
Family
ID=49154613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/588,680 Abandoned US20130259709A1 (en) | 2012-03-27 | 2012-08-17 | Oil pump control system for vehicle and operation method thereof |
Country Status (4)
Country | Link |
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US (1) | US20130259709A1 (en) |
KR (1) | KR20130109323A (en) |
CN (1) | CN103362591A (en) |
DE (1) | DE102012108027A1 (en) |
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US20130151113A1 (en) * | 2011-12-13 | 2013-06-13 | Kia Motors Corporation | Oil pump control system for vehicle |
US20150139840A1 (en) * | 2012-05-23 | 2015-05-21 | Pierburg Gmbh | Valve device for a hydraulic circuit, and oil pump control assembly |
US20170342891A1 (en) * | 2016-05-24 | 2017-11-30 | Hyundai Motor Company | Apparatus and method for controlling piston cooling oil jet |
US20220373076A1 (en) * | 2019-12-06 | 2022-11-24 | Jatco Ltd | Transmission and control method for lubricating oil pressure control valve |
US20230051429A1 (en) * | 2021-08-11 | 2023-02-16 | Hyundai Motor Company | Method of Controlling Electric Oil Pump for Vehicle |
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KR101509939B1 (en) * | 2013-10-17 | 2015-04-08 | 현대자동차주식회사 | Method for controling electric oil pump |
KR101505775B1 (en) * | 2014-04-15 | 2015-03-26 | 명화공업주식회사 | 2-stage variable displacement oil pump using one chamber and one two-way valve |
CN105041408A (en) * | 2015-08-13 | 2015-11-11 | 奇瑞汽车股份有限公司 | Control system for electronically-controlled engine oil pump of engine, and control method thereof |
WO2017085354A1 (en) * | 2015-11-19 | 2017-05-26 | Wärtsilä Finland Oy | Pressure regulating arrangement and method |
KR101990982B1 (en) * | 2017-12-29 | 2019-06-19 | 주식회사 현대케피코 | Control method fo variable displacement solenoid valve |
CN109000388A (en) * | 2018-06-15 | 2018-12-14 | 重庆美的通用制冷设备有限公司 | Water cooler and its oil pump control method, device |
KR102154115B1 (en) * | 2018-06-15 | 2020-09-09 | 명화공업주식회사 | Variable oil pump |
JP2021055602A (en) * | 2019-09-30 | 2021-04-08 | いすゞ自動車株式会社 | Oil supply apparatus of internal combustion engine |
CN115341974A (en) * | 2022-09-13 | 2022-11-15 | 广州汽车集团股份有限公司 | Control method and device for engine oil pressure of vehicle and hybrid electric vehicle |
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US20130151113A1 (en) * | 2011-12-13 | 2013-06-13 | Kia Motors Corporation | Oil pump control system for vehicle |
US20150139840A1 (en) * | 2012-05-23 | 2015-05-21 | Pierburg Gmbh | Valve device for a hydraulic circuit, and oil pump control assembly |
US20170342891A1 (en) * | 2016-05-24 | 2017-11-30 | Hyundai Motor Company | Apparatus and method for controlling piston cooling oil jet |
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US20220373076A1 (en) * | 2019-12-06 | 2022-11-24 | Jatco Ltd | Transmission and control method for lubricating oil pressure control valve |
US20230051429A1 (en) * | 2021-08-11 | 2023-02-16 | Hyundai Motor Company | Method of Controlling Electric Oil Pump for Vehicle |
US11643952B2 (en) * | 2021-08-11 | 2023-05-09 | Hyundai Motor Company | Method of controlling electric oil pump for vehicle |
Also Published As
Publication number | Publication date |
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CN103362591A (en) | 2013-10-23 |
KR20130109323A (en) | 2013-10-08 |
DE102012108027A1 (en) | 2013-10-02 |
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