CN103032205B - Digital control device of automatic air choke - Google Patents

Digital control device of automatic air choke Download PDF

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Publication number
CN103032205B
CN103032205B CN201210057734.4A CN201210057734A CN103032205B CN 103032205 B CN103032205 B CN 103032205B CN 201210057734 A CN201210057734 A CN 201210057734A CN 103032205 B CN103032205 B CN 103032205B
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motor
engine
control device
controller
digital control
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CN103032205A (en
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王运良
王韶华
陈伯和
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Sumec Machinery & Electric Co Ltd
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Sumec Machinery & Electric Co Ltd
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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

A kind of Choke Openner Digital Control device
Technical field
The present invention relates to a kind of automatic choke valve controlling device, the Choke Openner Digital Control device particularly driving 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 manual air door regulating arm, in the situation that ambient temperature is on the low side, this air door regulating arm is pushed to throttle position, reduce system air amount amount, increase the concentration of oil gas in mixed gas, make motor be easier to starting; After having started again by manually this air door regulating arm being pushed to normal operation position, to ensure in oil machine working procedure normal air imbibed quantity in Carburetor.
In the oil machine control system of some full-automatic startings, on market, commonly draw chock plate modulating valve to replace with electromagnet and manually dial regulating arm at present.That is, when starting oil machine, power to electromagnet, electromagnet is moved modulating valve to throttle position by electromagnetic force; After having started, 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, differ larger area for summer in winter temperature, automatic starter function usually can not meet the demands due to starting failure.Several years ago both at home and abroad some large enterprises and research institution begin one's study and control chock plate with stepper motor and realize different chock plates and regulate aperture.
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 engine inlets is controlled, it is characterized in that, the temperature information of the engine temperature when representing described engine start, the aperture of the described chock plate while determining engine start, and be provided with the motor for 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 determining is shorter, reference rotation speed is lower, the longer mode of time determining, the aperture of the aperture that decision makes described chock plate 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, and according to engine temperature information setting engine start rotating speed, control step motor drives chock plate control valve opening; And determine the throttling length of releasing time according to engine temperature height.With regard to function, this invention has solved the problem of variation of ambient temperature larger area engine start difficulty, but there are two problems below in this system: 1) owing to having increased engine temperature sensing unit and detection unit, this control system complex structure and reliability reduce; 2) set engine start rotating speed according to engine temperature, make this control system versatility 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 defect of prior art, while piloting engine for varying environment temperature, the difference of the concentration demand of oil gas in Carburetor, a kind of Choke Openner Digital Control device is provided, by the control unit based on microprocessor, under different ambient temperatures, automatically adjust according to set algorithm the time that different chock plate modulating valve complete shut-downs regulates to standard-sized sheet, realize at varying environment temperature, obtain different Carburetor gas concentrations, make to start function starting reliably automatically.Owing to not needing engine temperature to detect, whole system is simple and reliable; Because control unit is automatically adjusted and removed time of throttling process, system 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 engine inlets is controlled, this device comprises control unit based on microprocessor and for controlling the decelerating step motor of described chock plate aperture, it is characterized in that, rise then at motor, the described control unit based on microprocessor is by controlling the rotating speed of described decelerating step motor, and then adjust the adjusting time of chock plate modulating valve complete shut-down to standard-sized sheet, realize engine start.
The time that described adjustment chock plate modulating valve complete shut-down regulates to standard-sized sheet is specially, control unit based on microprocessor is according to the engine start frequency of failure, set reducing motor rotating speed, make this reducing motor rotating ratio lower last time, realizing the adjusting time of chock plate aperture from complete shut-down to standard-sized sheet successively increases.
As a further improvement on the present invention, the described control unit based on microprocessor comprises controller, actuating motor, motor drive module and detection unit, and motor drive module is connected with controller respectively with detection unit; Described detection unit detects the state of motor, and the state signal of motor is sent to controller, and controller judges that whether engine start is successful.
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 started successfully, sends the instruction of the motor that stops, and finishes starting process;
Step 2 controller reads the starting failure frequency n before motor;
Step 3 controller according to n set chock plate aperture by complete shut-down to the needed time T of standard-sized sheet n; T nbe set as increasing with the increase of n;
Step 4 controller is according to T nthe frequency F of calculated step motor driving pulse n;
Step 5 stepper motor driver module drives chock plate aperture to complete shut-down with the fastest speed control reducing motor, and rotates benchmark taking this position as reducing motor;
Step 6 controller control actuating motor drives engine rotation, simultaneously taking frequency as F npulsed drive reducing motor drive chock plate modulating valve to rotate from complete shut-down to standard-sized sheet;
Step 7 controller constantly reads engine status signal, determine whether motor starts successfully, starts successfully, and the motor that stops, exits starting process, otherwise starting failure number of times adds 1, repeated execution of steps 2 to 6.
Described engine status signal is engine rotational speed signal or the voltage signal exported by engine driven generators.
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 not needing temperature detecting unit, can realize at varying environment temperature, the motor of different model, producer is reliable starting automatically.
Brief description of the drawings
[0002] Fig. 1 is the embodiment of the present invention 1 Choke Openner Digitizing And Control Unit block diagram;
[0003] Fig. 2 is the embodiment of the present invention 1 Choke Openner Digitizing And Control Unit control flow chart;
[0004] Fig. 3 is the embodiment of the present invention 2 Choke Openner Digitizing And Control Unit block diagrams;
[0005] Fig. 4 is the embodiment of the present invention 3 Choke Openner Digitizing And Control Unit block diagrams;
In figure: the control unit of 1-based on microprocessor, 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 made up of the control unit 10 based on microprocessor, decelerating step motor 4a, chock plate modulating valve 7 and the actuating motor 5 be located in motor 6 intake ducts, control unit 10 based on microprocessor is made up of controller 1, stepper motor driver module 2a and engine speed detection unit 3a, and stepper motor driver module 2a is connected with controller 1 respectively with engine speed detection unit 3a.
Choke Openner Digitizing And Control Unit control flow chart is as shown in Figure 2:
Pilot engine after instruction when receiving, first control unit 1 based on microprocessor reads in the current tach signal of motor, judges whether motor starts, if started by this tach signal, send the instruction of motor 5 that stops, and finish starting process;
If motor, in outage state, reads the frequency n of starting failure above, set chock plate aperture time T n used from complete shut-down to standard-sized sheet according to n,
According to the frequency Fn of Tn calculated step motor driving pulse.
Control the carburetter choke controlling device 4a driving with reducing motor and arrive complete shut-down with the fastest speed driving chock plate aperture, and rotate benchmark taking this position as stepper motor;
Controlling actuating motor 5 drives motor 6 to rotate, pulse signal control step motor drive module 2a taking frequency as Fn simultaneously, stepper motor driver module 2a drives decelerating step motor 4a, and decelerating step motor 4a drives carburetter choke modulating valve 7 to realize chock plate aperture and moves from complete shut-down to standard-sized sheet;
The control unit 10 of whole process based on microprocessor reads the output signal of engine speed detection unit 3a always, if engine speed exceedes setting value and can maintain a period of time, judge and start successfully, motor stops, exit starting process, otherwise starting failure number of times adds 1, recalculates F n+1, repeat said process.
Embodiment 2
As shown in Figure 3, the 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, the 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 the direct current generator 4b that slows down.

Claims (5)

1. a Choke Openner Digital Control device, the aperture of being located at the chock plate modulating valve in engine inlets is controlled, this device comprises control unit based on microprocessor and for controlling the decelerating step motor of described chock plate aperture, in the time of engine start, the described control unit based on microprocessor is by controlling the rotating speed of described decelerating step motor, and then adjust the adjusting time of chock plate modulating valve complete shut-down to standard-sized sheet, realize engine start; It is characterized in that, the time that described adjustment chock plate modulating valve complete shut-down regulates to standard-sized sheet is specially, control unit based on microprocessor is according to the engine start frequency of failure, set reducing motor rotating speed, make this reducing motor rotating ratio lower last time, realizing the adjusting time of chock plate aperture from complete shut-down to standard-sized sheet successively increases.
2. Choke Openner Digital Control device according to claim 1, it is characterized in that, the described control unit based on microprocessor comprises controller, actuating motor, motor drive module and detection unit, and motor drive module is connected with controller respectively with detection unit; Described detection unit detects the state of motor, and the state signal of motor is sent to controller, and controller judges that whether engine start is successful.
3. Choke Openner Digital Control device according to claim 2, 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 started successfully, sends the instruction of the motor that stops, and finishes starting process;
Step 2 controller reads the starting failure frequency n before motor;
Step 3 controller according to n set chock plate aperture by complete shut-down to the needed time T of standard-sized sheet n; T nbe set as increasing with the increase of n;
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 taking this position as reducing motor;
Step 6 controller control actuating motor drives engine rotation, simultaneously taking frequency as F npulsed drive reducing motor drive chock plate modulating valve to rotate from complete shut-down to standard-sized sheet;
Step 7 controller constantly reads engine status signal, determine whether motor starts successfully, starts successfully, and the motor that stops, exits starting process, otherwise starting failure number of times adds 1, repeated execution of steps 2 to 6.
4. Choke Openner Digital Control device according to claim 2, is characterized in that, described engine status signal is by engine-driven generator output voltage or engine rotational speed signal.
5. Choke Openner Digital Control device according to claim 2, 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.
CN201210057734.4A 2012-03-07 2012-03-07 Digital control device of automatic air choke Active CN103032205B (en)

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Application Number Priority Date Filing Date Title
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CN103032205B true CN103032205B (en) 2014-12-10

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (3)

* Cited by examiner, † Cited by third party
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011089471A (en) * 2009-10-22 2011-05-06 Mitsubishi Heavy Ind Ltd Air-fuel ratio control device for carburetor

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Non-Patent Citations (1)

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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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