CN103032205A - Digital control device of automatic air choke - Google Patents
Digital control device of automatic air choke Download PDFInfo
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- CN103032205A CN103032205A CN2012100577344A CN201210057734A CN103032205A CN 103032205 A CN103032205 A CN 103032205A CN 2012100577344 A CN2012100577344 A CN 2012100577344A CN 201210057734 A CN201210057734 A CN 201210057734A CN 103032205 A CN103032205 A CN 103032205A
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Abstract
The invention relates to a digital control device of an automatic air choke. The digital control device is used for controlling the openness of an air choke adjusting valve in an engine air inlet. The digital control device comprises a control unit based on a microprocessor and a speed-reduction stepping motor for controlling the openness of the air choke; and when an engine is started, the control unit based on the microprocessor adjusts the adjusting time from a completely-closed state to a completely-opened state of the air choke adjusting valve by controlling the rotating speed of the speed-reduction stepping motor, so as to realize starting of the engine. The digital control device disclosed by the invention can achieve the purpose of automatic and reliable starting of engines with different models and different manufacturers under different environment temperatures under the condition that no temperature detection unit is needed.
Description
Technical field
The present invention relates to a kind of automatic choke valve controlling device, the Choke Openner Digital Control device that particularly drives based on microprocessor control, reducing motor.
Background technique
Existing general gasoline engines adopts the oil-fired system of carburetor type more, and that Carburetor has is simple in structure, use the advantages such as reliable.Consider the problem of winter or cold post-start, general Carburetor is all with the manual air door regulating arm, in ambient temperature situation on the low side, this air door regulating arm is pushed throttle position, reduce system's air amount amount, increase the concentration of oil gas in the mixed gas, make motor be easier to starting; After starting is finished again by manually this air door regulating arm being pushed normal operation position, to guarantee in the oil machine working procedure normal air imbibed quantity in the Carburetor.
In the oil machine control system of some full-automatic startings, commonly draw the chock plate modulating valve to replace manually dialling regulating arm with electromagnet on the market at present.That is, power to electromagnet in the time of the starting oil machine, electromagnet is moved modulating valve to throttle position by electromagnetic force; After starting is finished, the electromagnet auto-breaking, electromagnetic force disappears, and at this time moves modulating valve to normal operation position by return spring.
Because the chock plate modulating valve of magnet control can only have two limit positions, differs larger area for summer in winter temperature, automatic starter function usually can not meet the demands owing to starting failure.Several years ago some large enterprises begin one's study with research institution and control the different chock plate adjusting aperture of chock plate realization with stepper motor both at home and abroad.
The patent No. is that the Chinese invention patent of " 200510056338.X " discloses:
A kind of automatic choke, the temperature information of its engine temperature when representing engine start, the aperture of being located at the chock plate in the engine inlets is controlled, it is characterized in that, the temperature information of the engine temperature during according to the described engine start of representative, the aperture of the described chock plate when determining engine start, and be provided be used to the motor of controlling described chock plate aperture, described motor is controlled so as to the reference rotation speed convergence of setting, and according to described reference rotation speed, higher according to this reference rotation speed, the time that determines is shorter, reference rotation speed is lower, and the mode that the time that determines is longer, the aperture that determines the to make described chock plate aperture during from engine start is changed to standard-sized sheet, and until the time that throttling is removed.
This wind-proof door control device is to detect engine temperature by sensor, according to engine temperature information setting engine start rotating speed, and control step motor driving chock plate control valve opening; And determine just that according to engine temperature throttling removes the length of time.This invention has solved variation of ambient temperature larger area engine start hard problem with regard to function, but there are following two problems in this system: 1) owing to increased engine temperature sensing unit and detection unit, this control system complex structure and reliability reduce; 2) set the engine start rotating speed according to engine temperature, so that this control system versatility is relatively relatively poor, that is, the engine temperature that the machine of different model is close may need to set different starting speed.
Summary of the invention
The object of the invention is to overcome the defective of prior art, when piloting engine for the varying environment temperature, the difference of the concentration demand of oil gas in the Carburetor, a kind of Choke Openner Digital Control device is provided, by the microprocessor based control unit, under different ambient temperatures, automatically adjust different chock plate modulating valve complete shut-downs to the time of standard-sized sheet adjusting according to set algorithm, realize under the varying environment temperature, obtain different Carburetor gas concentrations, make and start automatically reliably starting of function.Because do not need engine temperature to detect, whole system is simple and reliable; Because control unit is adjusted the time of removing throttling process automatically, system's highly versatile is suitable for the motor of different model, different manufacturers.
A goal of the invention of the present invention is achieved through the following technical solutions: a kind of Choke Openner Digital Control device, the aperture of being located at the chock plate modulating valve in the engine inlets is controlled, this device comprises the microprocessor based control unit and is used for controlling the decelerating step motor of described chock plate aperture, it is characterized in that, rise then at motor, described microprocessor based control unit is by the rotating speed of the described decelerating step motor of control, and then adjust chock plate modulating valve complete shut-down to the adjusting time of standard-sized sheet, realize engine start.
The time that described adjustment chock plate modulating valve complete shut-down is regulated to standard-sized sheet is specially, the microprocessor based control unit is according to the engine start frequency of failure, set the reducing motor rotating speed, so that this reducing motor rotating ratio was lower last time, realize the adjusting time enhancing of chock plate aperture from the complete shut-down to the standard-sized sheet.
As a further improvement on the present invention, described microprocessor based control unit comprises controller, actuating motor, motor drive module and detection unit, and motor drive module is connected with controller with detection unit and is connected; Described detection unit detects the state of motor, and the state signal of motor is sent to controller, and controller judges whether successfully engine start.
As a further improvement on the present invention, described Choke Openner Digital Control device is carried out the following step:
Step 1 controller reads engine status signal, determines whether motor starts successfully, if start successfully, sends the instruction of the motor that stops, and finishes starting process;
Step 2 controller reads the starting failure frequency n before the motor;
Step 3 controller according to n set the chock plate aperture by complete shut-down to the needed time T of standard-sized sheet
nT
nThe increase that is set as with n increases;
Step 4 controller is according to T
nThe frequency F of calculated step motor driving pulse
n
Step 5 stepper motor driver module drives the chock plate aperture to complete shut-down with the fastest speed control reducing motor, and rotates benchmark take this position as reducing motor;
Described engine status signal is engine rotational speed signal or by the voltage signal of engine driven generators output.
Described reducing motor is decelerating step motor or deceleration direct current generator; Described motor drive module is decelerating step motor driver module or DC motor speed-regulating driver module.
The invention has the beneficial effects as follows: in the situation that does not need temperature detecting unit, can realize under the varying environment temperature that the motor of different model, producer is reliable starting automatically.
Description of drawings
[0002] Fig. 1 is the embodiment of the invention 1 Choke Openner Digitizing And Control Unit block diagram;
[0003] Fig. 2 is the embodiment of the invention 1 Choke Openner Digitizing And Control Unit control flow chart;
[0004] Fig. 3 is the embodiment of the invention 2 Choke Openner Digitizing And Control Unit block diagrams;
[0005] Fig. 4 is the embodiment of the invention 3 Choke Openner Digitizing And Control Unit block diagrams;
Among the figure: 1-microprocessor based control unit, 2a-reducing motor driver module, 2b-DC motor speed-regulating driver module; 3a-engine speed detection unit, the coaxial mounted generator output voltage detection unit of 3b-and motor, 4-reducing motor Carburetor, 5-actuating motor, 6-motor, 7-chock plate modulating valve.
Embodiment
Be described further below in conjunction with embodiment:
Embodiment 1
As shown in Figure 1, a kind of Choke Openner Digitizing And Control Unit is comprised of microprocessor based control unit 10, decelerating step motor 4a, chock plate modulating valve 7 and the actuating motor 5 be located in motor 6 intake ducts, microprocessor based control unit 10 is comprised of controller 1, stepper motor driver module 2a and engine speed detection unit 3a, and stepper motor driver module 2a is connected with engine speed detection unit 3a is connected connection with controller.
Choke Openner Digitizing And Control Unit control flow chart is as shown in Figure 2:
After receiving the instruction of piloting engine, microprocessor based control unit 1 at first reads in the current tach signal of motor, judges by this tach signal whether motor starts, if start, then send the instruction of the motor 5 that stops, and finish starting process;
If motor is in outage state, then read the frequency n of front starting failure, set chock plate aperture used time T n from the complete shut-down to the standard-sized sheet according to n,
Frequency Fn according to the pulse of Tn calculated step motor driving.
Control is arrived complete shut-down with the carburetter choke controlling device 4a that reducing motor drives with the fastest speed driving chock plate aperture, and rotates benchmark take this position as stepper motor;
Control actuating motor 5 drives motor 6 rotations, the pulse signal control step motor drive module 2a of while take frequency as Fn, stepper motor driver module 2a drives decelerating step motor 4a, and decelerating step motor 4a drives carburetter choke modulating valve 7 realization chock plate apertures and moves from the complete shut-down to the standard-sized sheet;
Whole process microprocessor based control unit 10 reads the output signal of engine speed detection unit 3a always, if engine speed surpasses setting value and can keep a period of time, then judge and start successfully, motor stops, withdraw from starting process, otherwise the starting failure number of times adds 1, recomputates F
N+1, repeat said process.
Embodiment 2
As shown in Figure 3, present embodiment and upper example are basic identical, and difference is that engine speed detection unit 3a is substituted by engine-driven generator output voltage detection unit 3b.
Embodiment 3
As shown in Figure 4, present embodiment and upper example are basic identical, and difference is that stepper motor driver module 2a is substituted by DC motor speed-regulating driver module 2b; Decelerating step motor 4a is substituted by deceleration direct current generator 4b.
Claims (6)
1. Choke Openner Digital Control device, the aperture of being located at the chock plate modulating valve in the engine inlets is controlled, this device comprises the microprocessor based control unit and is used for controlling the decelerating step motor of described chock plate aperture, it is characterized in that, rise then at motor, described microprocessor based control unit is by the rotating speed of the described decelerating step motor of control, and then adjustment chock plate modulating valve complete shut-down is realized engine start to the adjusting time of standard-sized sheet.
2. Choke Openner Digital Control device according to claim 1, it is characterized in that, the time that described adjustment chock plate modulating valve complete shut-down is regulated to standard-sized sheet is specially, the microprocessor based control unit is according to the engine start frequency of failure, set the reducing motor rotating speed, so that this reducing motor rotating ratio was lower last time, realize the adjusting time enhancing of chock plate aperture from the complete shut-down to the standard-sized sheet.
3. Choke Openner Digital Control device according to claim 1, it is characterized in that, described microprocessor based control unit comprises controller, actuating motor, motor drive module and detection unit, and motor drive module is connected with controller with detection unit and is connected; Described detection unit detects the state of motor, and the state signal of motor is sent to controller, and controller judges whether successfully engine start.
4. Choke Openner Digital Control device according to claim 3 is characterized in that, described Choke Openner Digital Control device is carried out the following step:
Step 1 controller reads engine status signal, determines whether motor starts successfully, if start successfully, sends the instruction of the motor that stops, and finishes starting process;
Step 2 controller reads the starting failure frequency n before the motor;
Step 3 controller according to n set the chock plate aperture by complete shut-down to the needed time T of standard-sized sheet
nT
nThe increase that is set as with n increases;
Step 4 controller is according to T
nCalculate the frequency F of reducing motor driving pulse
n
Step 5 stepper motor driver module drives windage door aperture to complete shut-down with the fastest speed control reducing motor, and rotates benchmark take this position as reducing motor;
Step 6 controller control actuating motor drives engine rotation, simultaneously take frequency as F
nThe pulsed drive reducing motor drive the chock plate modulating valve and from the complete shut-down to the standard-sized sheet, rotate;
Step 7 controller constantly reads engine status signal, determine whether motor starts successfully, starts successfully, and the motor that stops withdraws from starting process, otherwise the starting failure number of times adds 1, repeated execution of steps 2 to 6.
5. Choke Openner Digital Control device according to claim 3 is characterized in that, described engine status signal is by engine-driven generator output voltage or engine rotational speed signal.
6. Choke Openner Digital Control device according to claim 3 is characterized in that, described reducing motor is decelerating step motor or deceleration direct current generator; Described motor drive module is stepper motor driver module or DC motor speed-regulating driver module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057734.4A CN103032205B (en) | 2012-03-07 | 2012-03-07 | Digital control device of automatic air choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057734.4A CN103032205B (en) | 2012-03-07 | 2012-03-07 | Digital control device of automatic air choke |
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| CN103032205A true CN103032205A (en) | 2013-04-10 |
| CN103032205B CN103032205B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210057734.4A Active CN103032205B (en) | 2012-03-07 | 2012-03-07 | Digital control device of automatic air choke |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096540A (en) * | 2020-09-15 | 2020-12-18 | 重庆华世丹动力科技股份有限公司 | Air door control method for engine of generator during low-temperature starting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5033431A (en) * | 1990-07-02 | 1991-07-23 | General Motors Corporation | Method of learning gain for throttle control motor |
| CN1869422A (en) * | 2005-05-27 | 2006-11-29 | 本田技研工业株式会社 | Electrically-actuated throttle device for general-purpose engine |
| CN1896483A (en) * | 2005-07-13 | 2007-01-17 | 本田技研工业株式会社 | Automatic choke control system for general-purpose engine |
| WO2011048871A1 (en) * | 2009-10-22 | 2011-04-28 | 三菱重工業株式会社 | Air-fuel ratio control device for a carburetor |
-
2012
- 2012-03-07 CN CN201210057734.4A patent/CN103032205B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5033431A (en) * | 1990-07-02 | 1991-07-23 | General Motors Corporation | Method of learning gain for throttle control motor |
| CN1869422A (en) * | 2005-05-27 | 2006-11-29 | 本田技研工业株式会社 | Electrically-actuated throttle device for general-purpose engine |
| CN1896483A (en) * | 2005-07-13 | 2007-01-17 | 本田技研工业株式会社 | Automatic choke control system for general-purpose engine |
| WO2011048871A1 (en) * | 2009-10-22 | 2011-04-28 | 三菱重工業株式会社 | Air-fuel ratio control device for a carburetor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096540A (en) * | 2020-09-15 | 2020-12-18 | 重庆华世丹动力科技股份有限公司 | Air door control method for engine of generator during low-temperature starting |
| CN112096540B (en) * | 2020-09-15 | 2022-09-13 | 重庆华世丹动力科技有限公司 | Air door control method for low-temperature starting of engine of generator |
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| CN103032205B (en) | 2014-12-10 |
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Application publication date: 20130410 Assignee: Jiangsu Sumeida Electromechanical Industry Co.,Ltd. Assignor: SUMEC Machinery & Electric Co., Ltd. Contract record no.: 2012320000571 Denomination of invention: Digital control device of automatic air choke License type: Exclusive License Record date: 20120504 |
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