CN104074639B - A kind of direct current generator EGR valve controller - Google Patents
A kind of direct current generator EGR valve controller Download PDFInfo
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- CN104074639B CN104074639B CN201410340628.6A CN201410340628A CN104074639B CN 104074639 B CN104074639 B CN 104074639B CN 201410340628 A CN201410340628 A CN 201410340628A CN 104074639 B CN104074639 B CN 104074639B
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Abstract
The invention discloses a kind of direct current generator EGR valve controller, comprise main chip module, power module, direct current generator EGR valve control module, sensor input signal puocessing module, communication module, warm-up control module and secondary control module; The signal obtained according to sensor input signal puocessing module is via exporting corresponding SC sigmal control control module after main chip module logical process by normal logic work, in order to accurately to control the aperture size of direct current generator EGR valve, make the work of direct current generator EGR valve or it is tested.
Description
Technical field
The present invention relates to DC control technology field, particularly direct current generator EGR valve controller in a kind of engine exhaust emission gas recirculation system.
Background technique
Direct current generator EGR valve is domestic enterprise is one of state four electric control product of domestic car load (motor) factory exploitation, its principle is the straight line motion of valve switch by the convert rotational motion of motor, the flow of cycle of engine waste gas is controlled by the folding of valve, then engine intake is imported to, thus reduce temperature and the oxygen content of engine combustion indoor, and then reduce the discharge of pollutant NOx.Compare pneumatic EGR valve, direct current generator EGR valve has fast response time, controls accurately, without the need to features such as vacuum sources.
At present, field is manufactured in direct current generator EGR valve, also there is no the special controller designed for controlling direct current generator EGR valve, in the test and using process of direct current generator EGR, be badly in need of a kind of controller and can control direct current generator EGR valve well and undertaken detecting or working by specific requirement.
Summary of the invention
The object of this invention is to provide a kind of accurately can control direct current generator EGR valve aperture size and the controller that direct current generator EGR valve normally works or test it can be controlled.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
A kind of direct current generator EGR valve controller, the communication module comprising main chip module, power module, control module, sensor input signal puocessing module and be connected with diagnostic equipment or computer, described sensor input signal puocessing module is used for the active transducer signal of collection, passive transducer signal, d. c. voltage signal and tach signal to process, and exports to main chip module; The signal that main chip module obtains according to sensor input signal puocessing module is via exporting corresponding SC sigmal control control module after main chip module logical process by setting logic working; Control module is used for the drive singal exporting different frequency and dutycycle to direct current generator EGR valve to be tested; Power module is respectively sensor input signal puocessing module and main chip module provides working power; Communication module realizes the communication connection between main chip module and diagnostic equipment or computer.
The concrete structure of main chip module of the present invention is: described main chip module comprises single-chip microcomputer, chip external memory, electrical signal sample circuit, clock circuit and the first eliminator, described chip external memory and single-chip microcomputer interconnect, for expanding memory data output, clock circuit is used for providing CLK clock to single-chip microcomputer; The input end of described single-chip microcomputer is through the output terminal of the first eliminator connecting sensor input signal puocessing module, and the input end of single-chip microcomputer is also connected with electrical signal sample circuit, the input end of the output terminal link control module of single-chip microcomputer.
The concrete structure of control module of the present invention is: described control module comprises signal drive circuit, over-current protection circuit and the second eliminator; Described signal drive circuit exports drive singal and the clockwise and anticlockwise signal of different frequency and dutycycle to direct current generator EGR valve to be tested; signal drive circuit connects the output terminal of power module through over-current protection circuit, and signal drive circuit also connects the output terminal of single-chip microcomputer in main chip module through the second eliminator.
The concrete structure of sensor input signal puocessing module of the present invention is: described sensor input signal puocessing module comprises independent the active transducer signal processing circuit, passive transducer signal processing circuit, d. c. voltage signal processing circuit and the rotary speed signal sensor processing circuit that arrange; Described active transducer signal processing circuit comprises current-limiting resistance R1, filter capacitor C1, pull down resistor R2, between the output terminal being serially connected in current-limiting resistance R1 after described filter capacitor C1 and pull down resistor R2 is connected in parallel and ground; Described passive transducer signal processing circuit comprises current-limiting resistance R3, divider resistance R4 and filter capacitor C2 and C3, between the input end that described divider resistance R4 and filter capacitor C3 is connected in series in current-limiting resistance R3 and ground, lower end connection+the 5V of divider resistance R4, between the output terminal that filter capacitor C2 is connected to current-limiting resistance R3 and ground; Described d. c. voltage signal processing circuit comprises current-limiting resistance R5, filter capacitor C4, pull down resistor R6, voltage-stabiliser tube Z1 and waveform shaping chip U1, described current-limiting resistance R5 and waveform shaping chip U1 is connected in series, between the output terminal being serially connected in current-limiting resistance R5 after filter capacitor C4, pull down resistor R6 and voltage-stabiliser tube Z1 are connected in parallel and ground; Described rotary speed signal sensor processing circuit comprises voltage comparator U1A, integrated reverser U3A, photo coupler U2, electric capacity C5 and resistance R7 ~ R11; The positive input terminal of voltage comparator U1A connects tach signal input end through resistance R7, the positive input terminal of voltage comparator U1A is also through electric capacity C5 ground connection, the negative input end of voltage comparator U1A connects Vcc through resistance R8, the negative input end of voltage comparator U1A is also through resistance R9 ground connection, the output terminal of voltage comparator U1A connects the input end of integrated reverser U3A through photo coupler U2, the output terminal output speed signal of integrated reverser U3A; The output terminal of the output terminal of voltage comparator U1A also connects Vcc through resistance R10, and the input end of integrated reverser U3A meets VBAT through resistance R11.
The concrete structure of power module of the present invention is: described power module comprises power supply master chip, protective circuit, capacitor filter and power signal sampling circuit; The input end of described power supply master chip connects power supply through protective circuit, and power supply master chip exports two-way power supply simultaneously and is respectively main chip module and sensor input signal puocessing module is powered; Protective circuit realizes anti-electric current, voltage and anti-reverse protective function; Whether power signal sampling circuit is used for sampling to the power supply signal exported and detecting power supply master chip being operated in normal range (NR).
Improvement of the present invention is: the output terminal of described main chip module is also connected with warm-up control module, and described warm-up control module comprises pliotron Q1 and sustained diode 1; The base stage of described pliotron Q1 connects the output terminal of main chip module, and the collector electrode of pliotron Q1 connects the positive pole of sustained diode 1, the grounded-emitter connection of pliotron Q1; The current collection very signal output part of pliotron Q1.
Owing to have employed above technological scheme, the invention technological progress is as follows.
The present invention is used for the control of automobile or engineering vehicle direct current generator EGR valve, by this controller, according to the SC sigmal control direct current generator EGR valve control module work that sensor input signal puocessing module obtains, and then control the flow of engine exhaust, decrease the discharge of pollutant; By this controller, also can test direct current generator EGR valve, monitor the properties of EGR valve, technician can by the operation of communication module realization to controller; Meanwhile, controller also can possess OBD(On-Board Diagnostics (OBD)) function, the failure condition of EGR valve can be found out by storage inside diagnostic trouble code.Separately as required, can warm-up control module and secondary control module be passed through, realize the functions such as car load preheating, oil return, fuel feeding, high idle speed.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the structured flowchart of main chip module of the present invention;
Fig. 3 is the structured flowchart of power module of the present invention;
Fig. 4 is the structured flowchart of control module of the present invention;
Fig. 5 is the circuit diagram of sensor input signal puocessing module of the present invention;
Fig. 6 is the circuit diagram of warm-up control of the present invention electricity module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
A kind of direct current generator EGR valve controller, its structure as shown in Figure 1.Comprise main chip module, power module, control module, sensor input signal puocessing module, communication module, warm-up control module and secondary control module, the output terminal of power module is connected with the power end of main chip module and sensor input signal puocessing module respectively, the input end of main chip module is connected with the output terminal of sensor input signal puocessing module, the output terminal of main chip module is connected with the input end of control module, warm-up control module and secondary control module respectively, and main chip module is intercomed mutually by communication module and diagnostic equipment or computer.
Wherein: sensor input signal puocessing module is used for the active transducer signal of collection, passive transducer signal, d. c. voltage signal and tach signal to process, and exports to main chip module, and its circuit diagram as shown in Figure 5.Comprise independent the active transducer signal processing circuit, passive transducer signal processing circuit, d. c. voltage signal processing circuit and the rotary speed signal sensor processing circuit that arrange.
The active transducer signal that wherein active transducer signal processing circuit is used for gathering processes, comprise current-limiting resistance R1, filter capacitor C1, pull down resistor R2, between the output terminal being serially connected in current-limiting resistance R1 after described filter capacitor C1 and pull down resistor R2 is connected in parallel and ground; Active transducer is throttle sensor, lift range sensor etc. such as.
The passive transducer signal that passive transducer signal processing circuit is used for gathering processes, comprise current-limiting resistance R3, divider resistance R4 and filter capacitor C2 and C3, between the input end that described divider resistance R4 and filter capacitor C3 is connected in series in current-limiting resistance R3 and ground, lower end connection+the 5V of divider resistance R4, between the output terminal that filter capacitor C2 is connected to current-limiting resistance R3 and ground; Passive transducer such as cooling-water temperature sensor etc.
The d. c. voltage signal that d. c. voltage signal processing circuit is used for gathering processes, and comprises current-limiting resistance R5, filter capacitor C4, pull down resistor R6, voltage-stabiliser tube Z1 and waveform shaping chip U1; Current-limiting resistance R5 and waveform shaping chip U1 is connected in series, between the output terminal being serially connected in current-limiting resistance R5 after filter capacitor C4, pull down resistor R6 and voltage-stabiliser tube Z1 are connected in parallel and ground.
Rotary speed signal sensor processing circuit comprises voltage comparator U1A, integrated reverser U3A, photo coupler U2, electric capacity C5 and resistance R7 ~ R11; The positive input terminal of voltage comparator U1A connects tach signal input end through resistance R7, the positive input terminal of voltage comparator U1A is also through electric capacity C5 ground connection, the negative input end of voltage comparator U1A connects Vcc through resistance R8, the negative input end of voltage comparator U1A is also through resistance R9 ground connection, the output terminal of voltage comparator U1A connects the input end of integrated reverser U3A through photo coupler U2, the output terminal output speed signal of integrated reverser U3A; The output terminal of the output terminal of voltage comparator U1A also connects Vcc through resistance R10, and the input end of integrated reverser U3A meets VBAT through resistance R11.The measures such as rotary speed signal sensor processing circuit have employed lower pass-filter, compares, decoupling, adopt voltage comparator U1A by sine wave shaped to rectangular pulse, analog end and digital end separate by photo coupler U2, play Anti-Jamming; The signal that photo coupler TLP521-2 exports through the further shaping of the integrated reverser of U3A and steadily after be input to single-chip microcomputer through the first eliminator.
The signal that main chip module is used for obtaining according to sensor input signal puocessing module is via exporting corresponding SC sigmal control control module after main chip module logical process by setting logic working, its structure as shown in Figure 2, comprises a single-chip microcomputer, chip external memory, electrical signal sample circuit, clock circuit and first eliminator.Chip external memory and single-chip microcomputer interconnect, for expanding memory data output; The output terminal of clock circuit connects the input end of single-chip microcomputer, for providing CLK clock to single-chip microcomputer; The input end of single-chip microcomputer through the output terminal of the first eliminator connecting sensor input signal puocessing module, the input end of the output terminal link control module of single-chip microcomputer; The input end of electrical signal sample circuit connects the lift range sensor of direct current generator EGR valve to be tested, the output terminal of electrical signal sample circuit connects the input end of single-chip microcomputer, for testing the aperture size of direct current generator EGR valve, and feeding back to single-chip microcomputer, carrying out the adjustment of control signal.
Power module is respectively sensor input signal puocessing module and main chip module provides working power; its structure as shown in Figure 3; comprise power supply master chip, protective circuit, capacitor filter and power signal sampling circuit; the input end of protective circuit connects power supply; the output terminal of protective circuit connects power supply master chip, and the input end of power supply master chip is also connected with the output terminal of power signal sampling circuit and capacitor filter respectively.Described power supply master chip can export two-way power supply simultaneously, is respectively main chip module and powers and sensor input signal puocessing module is powered; Protective circuit realizes anti-electric current, voltage and anti-reverse protective function; Whether power signal sampling circuit, be supplied to master chip process in order to carry out sampling to the power supply signal exported, detect power supply chip and be operated in normal range (NR).
Control module is used for the drive singal exporting different frequency and dutycycle to direct current generator EGR valve to be tested, and its structure as shown in Figure 4, comprises signal drive circuit, over-current protection circuit and the second eliminator; The input end of over-current protection circuit connects power module; the output terminal connection signal drive circuit of over-current protection circuit; the input end of signal drive circuit is also connected with electrical signal sample circuit and the second eliminator respectively, and the input end of the second eliminator connects the output terminal of main chip module.Described signal drive circuit can export different frequency, the drive singal of dutycycle and clockwise and anticlockwise signal, controls the work of direct current generator EGR valve, and can realize clockwise and anticlockwise for realizing; The voltage signal that power module exports is powered to signal drive circuit by protective circuit; The signal that second eliminator realizes main chip module exports carries out filtering process.
Communication module comprises communication chip and peripheral circuit thereof, realizes being connected with diagnostic equipment or computer by communication interface.
Direct current generator EGR valve controller in the present embodiment also comprises the warm-up control module and secondary control module that are connected with control module output terminal respectively.
Wherein warm-up control module such as, for controlling big current (within being limited to 3A) device or relay carries out action, preheating relay, solenoid valve etc.The circuit diagram of warm-up control module as shown in Figure 6, comprise a pliotron Q1 and sustained diode 1, the base stage of described pliotron Q1 connects the output terminal of main chip module, the collector electrode of pliotron Q1 connects the positive pole of sustained diode 1, the grounded-emitter connection of pliotron Q1; The current collection very signal output part of pliotron Q1; The negative pole of sustained diode 1 connects positive source VBAT, like this when preheating relay quits work, produce perceptual electrical signal just consume by fly-wheel diode.
Secondary control module comprises control chip and peripheral circuit thereof, is not very large device or relay work in order to control electric current.In the present embodiment, secondary control module comprises seven way switch control circuits, can control the relay work comprising preheat lamp, trouble light, oil return, high idle speed, confession wet goods device.
The direct current generator EGR valve that the present invention is used for producing is tested, and its working procedure is as described below:
First, data are inputted according to the parameter request of different model direct current generator EGR valve to direct current generator EGR valve controller inside.Such as: the control frequency, pid parameter, arteries and veins spectral data etc. of motor.
Then, sensor input signal puocessing module is connected with each sensor respectively, and control module and direct current generator EGR valve are connected.Sensor comprises throttle sensor, speed probe, cooling-water temperature sensor, intake flow sensor, air inlet pressure sensor etc.
After energising, the logic operation that direct current generator EGR valve sets according to controller, when the sensor outputs signal, sensor input signal puocessing module carries out gathering, change and export to main chip module after processing, main chip module searches corresponding data according to the signal of input in the arteries and veins spectrogram of correspondence, according to the data of searching, main chip module is according to the control frequency arranged and pid parameter to the control signal of control module delivery valve aperture, and control module controls direct current generator EGR valve and opens (control signal is the electrical signal of variable duty ratio) after receiving signal.
Now, the lift range sensor in direct current generator EGR valve, according to the size of valve opening, to main chip module input voltage signal, after the electrical signal sample circuit of main chip module gathers this electrical signal, carries out the judgement of signal.If the aperture of valve does not reach the requirement of data in arteries and veins spectrogram, then change the size of dutycycle accordingly, until aperture is stabilized in required scope.
In running, control abnormal if occur, direct current generator EGR valve can automatically generate a diagnostic trouble code and be stored in chip external memory, facilitates technician to read and solves, processes.In test process, technician also connects computer by communication interface or diagnostic equipment is modified to all parameters, monitor, preserved, to reach test objective.Certainly, the connection of OBD also can be realized by communication module.
When the present invention is used for controlling the direct current generator EGR valve in car, by communication module real-time monitoring system operation information, as the real-time change situation of rotating speed, throttle, water temperature, suction pressure, charge flow rate, the aperture of direct current EGR valve, electric current, dutycycle real-time change, the unlatching of valve, shut-in time equicorrelated case.In addition, as required, warm-up control module and secondary control module can be increased.Warm-up control part can control big current (in 3A) device or relay, such as preheating relay, solenoid valve etc.Auxiliary control can control low current device or relay (in 300mA), as preheat lamp, trouble light, oil return solenoid valve relay, high idle speed solenoid relay valve etc.
Claims (5)
1. a direct current generator EGR valve controller, it is characterized in that: the communication module comprising main chip module, power module, control module, sensor input signal puocessing module and be connected with diagnostic equipment or computer, described sensor input signal puocessing module is used for the active transducer signal of collection, passive transducer signal, d. c. voltage signal and tach signal to process, and exports to main chip module; The signal that main chip module obtains according to sensor input signal puocessing module is via exporting corresponding SC sigmal control control module after main chip module logical process by setting logic working; Control module is used for the drive singal exporting different frequency and dutycycle to direct current generator EGR valve to be tested; Power module is respectively sensor input signal puocessing module and main chip module provides working power; Communication module realizes the communication connection between main chip module and diagnostic equipment or computer;
The output terminal of described main chip module is also connected with warm-up control module, and described warm-up control module comprises pliotron Q1 and sustained diode 1; The base stage of described pliotron Q1 connects the output terminal of main chip module, and the collector electrode of pliotron Q1 connects the positive pole of sustained diode 1, the grounded-emitter connection of pliotron Q1; The current collection very signal output part of pliotron Q1.
2. a kind of direct current generator EGR valve controller according to claim 1, it is characterized in that: described main chip module comprises single-chip microcomputer, chip external memory, electrical signal sample circuit, clock circuit and the first eliminator, described chip external memory and single-chip microcomputer interconnect, for expanding memory data output, clock circuit is used for providing CLK clock to single-chip microcomputer; The input end of described single-chip microcomputer is through the output terminal of the first eliminator connecting sensor input signal puocessing module, and the input end of single-chip microcomputer is also connected with electrical signal sample circuit, the input end of the output terminal link control module of single-chip microcomputer.
3. a kind of direct current generator EGR valve controller according to claim 2, is characterized in that: described control module comprises signal drive circuit, over-current protection circuit and the second eliminator; Described signal drive circuit exports drive singal and the clockwise and anticlockwise signal of different frequency and dutycycle to direct current generator EGR valve to be tested; signal drive circuit connects the output terminal of power module through over-current protection circuit, and signal drive circuit also connects the output terminal of single-chip microcomputer in main chip module through the second eliminator.
4. a kind of direct current generator EGR valve controller according to claim 1, is characterized in that: described sensor input signal puocessing module comprises independent the active transducer signal processing circuit, passive transducer signal processing circuit, d. c. voltage signal processing circuit and the rotary speed signal sensor processing circuit that arrange;
Described active transducer signal processing circuit comprises current-limiting resistance R1, filter capacitor C1, pull down resistor R2, between the output terminal being serially connected in current-limiting resistance R1 after described filter capacitor C1 and pull down resistor R2 is connected in parallel and ground;
Described passive transducer signal processing circuit comprises current-limiting resistance R3, divider resistance R4 and filter capacitor C2 and C3, between the input end that described divider resistance R4 and filter capacitor C3 is connected in series in current-limiting resistance R3 and ground, lower end connection+the 5V of divider resistance R4, between the output terminal that filter capacitor C2 is connected to current-limiting resistance R3 and ground;
Described d. c. voltage signal processing circuit comprises current-limiting resistance R5, filter capacitor C4, pull down resistor R6, voltage-stabiliser tube Z1 and waveform shaping chip U1, described current-limiting resistance R5 and waveform shaping chip U1 is connected in series, between the output terminal being serially connected in current-limiting resistance R5 after filter capacitor C4, pull down resistor R6 and voltage-stabiliser tube Z1 are connected in parallel and ground;
Described rotary speed signal sensor processing circuit comprises voltage comparator U1A, integrated reverser U3A, photo coupler U2, electric capacity C5 and resistance R7 ~ R11; The positive input terminal of voltage comparator U1A connects tach signal input end through resistance R7, the positive input terminal of voltage comparator U1A is also through electric capacity C5 ground connection, the negative input end of voltage comparator U1A connects Vcc through resistance R8, the negative input end of voltage comparator U1A is also through resistance R9 ground connection, the output terminal of voltage comparator U1A connects the input end of integrated reverser U3A through photo coupler U2, the output terminal output speed signal of integrated reverser U3A; The output terminal of the output terminal of voltage comparator U1A also connects Vcc through resistance R10, and the input end of integrated reverser U3A meets VBAT through resistance R11.
5. a kind of direct current generator EGR valve controller according to claim 1, is characterized in that: described power module comprises power supply master chip, protective circuit, capacitor filter and power signal sampling circuit; The input end of described power supply master chip connects power supply through protective circuit, and power supply master chip exports two-way power supply simultaneously and is respectively main chip module and sensor input signal puocessing module is powered; Protective circuit realizes anti-electric current, voltage and anti-reverse protective function; Whether power signal sampling circuit is used for sampling to the power supply signal exported and detecting power supply master chip being operated in normal range (NR).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106051182A (en) * | 2016-08-23 | 2016-10-26 | 无锡隆盛科技股份有限公司 | Intelligent butterfly valve with CAN (controller area network) bus communication function |
| CN106121840A (en) * | 2016-08-23 | 2016-11-16 | 无锡隆盛科技股份有限公司 | Intelligence EGR valve |
| CN106523201A (en) * | 2016-12-28 | 2017-03-22 | 无锡隆盛科技股份有限公司 | Multi-way EGR valve controller |
| CN107202691A (en) * | 2017-08-03 | 2017-09-26 | 深圳市山水动力科技有限公司 | EGR valve detector |
| CN107620645B (en) * | 2017-09-18 | 2023-10-03 | 北汽福田汽车股份有限公司 | EGR valve control device, engine system and vehicle |
| CN109083755B (en) * | 2018-09-30 | 2021-06-22 | 潍柴动力股份有限公司 | Valve control method and device for engine |
| CN111927657B (en) * | 2020-08-11 | 2021-08-03 | 一汽解放汽车有限公司 | Structural design method of engine air inlet system |
| CN111927666B (en) * | 2020-08-14 | 2021-10-29 | 无锡职业技术学院 | High-pressure common rail oil sprayer rapid follow current circuit |
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| CN100535417C (en) * | 2007-07-06 | 2009-09-02 | 广东工业大学 | Electronic controller of electron controlled exhaust gas recirculation system in diesel engine |
| CN201066831Y (en) * | 2007-07-17 | 2008-05-28 | 天津市恒业特斯科过程控制设备有限公司 | Frequency conversion execution mechanism for DC brushless servo electromotor |
| JP5364610B2 (en) * | 2010-02-09 | 2013-12-11 | 三菱重工業株式会社 | Exhaust gas recirculation control device for internal combustion engine |
| CN202578924U (en) * | 2012-05-18 | 2012-12-05 | 中国汽车工程研究院股份有限公司 | Electronic control unit of high pressure injection system of automobile diesel engine |
| CN203978650U (en) * | 2014-07-16 | 2014-12-03 | 无锡隆盛科技股份有限公司 | A kind of direct current generator EGR valve control |
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