CN104047720A - Electric control engine OBD (on-board diagnostics) torque limiting system and electric control engine OBD torque limiting method - Google Patents
Electric control engine OBD (on-board diagnostics) torque limiting system and electric control engine OBD torque limiting method Download PDFInfo
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- CN104047720A CN104047720A CN201310082197.3A CN201310082197A CN104047720A CN 104047720 A CN104047720 A CN 104047720A CN 201310082197 A CN201310082197 A CN 201310082197A CN 104047720 A CN104047720 A CN 104047720A
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Abstract
The invention discloses an electric control engine OBD (on-board diagnostics) torque limiting system and an electric control engine OBD torque limiting method. The electric control engine OBD torque limiting system comprises a temperature sensor, a torque reducing resistor, an engine controller, a torque reducing control module and a torque reducing resistor relay, wherein the torque reducing relay is in control connection with the torque reducing control module, the temperature sensor is connected with the engine controller for forming an electric control engine thermal protection system, the torque reducing resistor is connected in parallel or connected in series into the engine thermal protection system through the torque reducing resistor relay, and the input end of the torque reducing control module is connected with an electric control engine SCR system and an NOx sensor. The electric control engine OBD torque limiting system has the advantages that the application range is wide, and the electric control engine OBD torque limiting system can be applied to all electric control engines with thermal protection functions; the cost advantages are obvious; the electric control system for national II engines can realize the OBD torque limiting function through simple calibration, and the development cost of national IV and national V engines is reduced.
Description
Technical field
The present invention relates to engine art, particularly a kind of electric-control motor OBD torque limited system and method thereof.
Background technique
OBD is the abbreviation of English On-Board Diagnostics, and translator of Chinese is " On-Board Diagnostics (OBD) ".This system is monitored automobile at any time by the operation conditions from motor, and whether tail gas exceeds standard, once exceed standard, can send warning at once, and starts outside and subtract moment of torsion function.
State IV electric-control motor laws and regulations requirement electric-control motor must have OBD function, and Some Domestic electric-control motor Shi You state III demarcates by optimization and increases post-processing module and directly completes.This upgrading electric-control motor torque-limiting function only can be controlled fuel injection quantity by engine controller (EECU) and realize, and does not have exhausting control function, cannot discharge the torque-limiting function exceeding standard by EECU, just cannot meet OBD laws and regulations requirement.
Therefore, existing electric-control motor OBD authentication subtracts moment of torsion function can only be by upgrading engine controller (EECU), make it have exhausting control function, could meet OBD laws and regulations requirement, but which has following shortcoming: first, domestic enterprise is due to the restriction of technology and cost when state III stage E ECU develops, and equal untapped OBD functions certainly will will be paid larger cost and upgrade for EECU in upgrading state IV process substantially; Secondly, the blockade on new techniques of overseas enterprise to this EECU, the former EECU for state III motor does not support OBD function, upgrading EECU controller price must improve, and the cost improving can append to new EECU above, cause engine production enterprise will bear the raising of this cost; Finally, for engine production enterprise, by upgrading EECU, reach and meet OBD authentication requesting and realize and to subtract moment of torsion function, compared with EECU price, improving what more allow it is difficult to accept is that all duties of engine all need again to demarcate, and to realizing the cost price that state IV and above emission request pay, will greatly increase.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, provides a kind of simple and reasonable, realizes the torque limited of motor based on EECU heat protection function, electric-control motor OBD torque limited system and method thereof that cost is low.
For achieving the above object, according to an aspect of the present invention, a kind of electric-control motor OBD torque limited system is provided, comprise: temperature transducer, subtract moment of torsion resistance, engine controller and subtract moment of torsion control module, and with subtract moment of torsion control module control connection subtract moment of torsion resistance relay, temperature transducer and engine controller are connected to form electric-control motor thermal protection system; Subtract moment of torsion resistance by subtracting moment of torsion resistance relay serial or parallel connection access engine thermal protective system, the input end that subtracts moment of torsion control module is connected with NOx sensor with electric-control motor SCR system.
In technique scheme, while subtracting moment of torsion resistance series connection access engine thermal protective system, subtract moment of torsion resistance relay and comprise: the first relay and the second relay; The input end of temperature transducer is connected with the output terminal of engine controller by the first temperature signal bundle of inputs, its output terminal by the second temperature signal bundle of outputs with subtract moment of torsion resistance and connect after, then be connected with the input end of engine controller; The movable contact of the first relay output end and stationary contact are connected respectively to the two ends that subtract moment of torsion resistance, the movable contact of the second relay output end and stationary contact be connected respectively to temperature transducer input end and output terminal.
In technique scheme, while subtracting moment of torsion resistance access in parallel engine thermal protective system, subtract moment of torsion resistance relay and comprise: the 3rd relay; The input end of temperature transducer is connected with the output terminal of engine controller, and output terminal is connected with the input end of engine controller; After subtracting moment of torsion resistance and connecting with the 3rd relay, more in parallel with temperature transducer.
In technique scheme, also comprise: be arranged on the spring return function device that subtracts moment of torsion control module and subtract the joint of moment of torsion resistance wire harness.
In technique scheme, temperature transducer is cooling-water temperature sensor, fuel temperature sensor, intake air temperature sensor or oil temperature sensor.
In technique scheme, the resistance that subtracts moment of torsion resistance is chosen higher than 50% and lower than the corresponding resistance of 60% engine thermal protective system torque limited temperature.
According to another aspect of the present invention, provide a kind of electric-control motor OBD torque limited method of applying above-mentioned electric-control motor OBD torque limited system, comprised the following steps:
Step 1: subtract the discharge of moment of torsion control module reception car load and carry out testing signal;
Step 2: subtract moment of torsion control module and judge whether car load discharge exceeds standard, and send break-make instruction and subtract moment of torsion resistance and whether access electric-control motor thermal protection system to control to subtracting moment of torsion resistance relay,
When car load discharge exceeds standard, subtract the control of moment of torsion control module and subtract moment of torsion resistance access electric-control motor thermal protection system, then substitute temperature transducer and protect actuating signal to engine controller transmission heat;
Step 3: starting torque limitation function after engine controller reception heat protection actuating signal.
Compared with prior art, the present invention has following beneficial effect: this electric-control motor OBD torque limited system applied widely, goes for having on all electric-control motors of heat protection function; Cost advantage is obvious; The automatical control system of state III motor, can realize OBD torque-limiting function by simple demarcation, reduces state IV, state V engine development cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electric-control motor OBD torque limited system embodiment one of the present invention;
Fig. 2 is the schematic diagram of electric-control motor OBD torque limited system embodiment two of the present invention;
Fig. 3 is the flow chart of electric-control motor OBD torque limited method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, a specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.It will be appreciated that, mentioned in following mode of execution of the present invention " on ", D score, " left side ", " right side ", " front " and " reverse side " all take the direction shown in each figure as benchmark, these words that are used for limiting direction are only used to be convenient to explanation, do not represent the restriction to the concrete technological scheme of the present invention.
Electric-control motor OBD torque limited system of the present invention is controlled and is subtracted moment of torsion resistance and whether access electric-control motor thermal protection system according to car load discharge testing result by subtracting moment of torsion control module; thereby will subtract moment of torsion resistance, replace the former temperature transducer of electric-control motor thermal protection system to transmit heat protection actuating signal to engine controller (EECU), to realize OBD torque-limiting function.This electric-control motor OBD torque limited system comprises: subtract moment of torsion resistance serial or parallel connection access electric-control motor thermal protection system two schemes.
Embodiment one,
As shown in Figure 1, in series resistors scheme, specifically comprising of this electric-control motor OBD torque limited system: temperature transducer 1, subtract moment of torsion resistance 2, engine controller 3 and subtract moment of torsion control module 4, and subtracting relay 5, the relay 6 of moment of torsion control module 4 control connections with this.
Temperature transducer 1 is cooling-water temperature sensor, fuel temperature sensor, intake air temperature sensor or oil temperature sensor, its input end is connected with the output terminal of engine controller (EECU) 3 by the temperature signal bundle of inputs 12, output terminal by the temperature signal bundle of outputs 11 with subtract moment of torsion resistance 2 and be connected in series after, then be connected with the input end of engine controller (EECU) 3.The movable contact of relay 5 output terminals and stationary contact are connected respectively to the left and right two ends that subtract moment of torsion resistance 2, the movable contact of relay output end 6 and stationary contact be connected respectively to temperature transducer 1 input end and output terminal.
The input end that subtracts moment of torsion control module 4 is connected with NOx sensor with electric-control motor SCR system, and for receiving row's temperature signal, the NOx sensor signal of electric-control motor SCR system, to car load, discharge detects; Its output terminal is connected with relay 5, relay 6 respectively; for controlling and subtract moment of torsion resistance 2 and whether access electric-control motor thermal protection system by the switching of control relay 5, relay 6; thereby will subtract moment of torsion resistance, replace the former temperature transducer of electric-control motor thermal protection system to transmit heat protection actuating signal to engine controller (EECU), to realize OBD torque-limiting function.
When subtracting that moment of torsion control module 4 does not receive that discharge exceeds standard or other of laws and regulations requirement activate torque limiter instructions, be that control relay 6 disconnects, relay 5 closures (subtract moment of torsion resistance 2 by short circuit, do not access electric-control motor thermal protection system), now, enter temperature value (resistance value of temperature transducer 1) or the actual value of temperature transducer 1 of engine controller (EECU) 3, the actual value of this temperature transducer 1 does not arrive the setting value of engine controller (EECU) 3 temperature protection, engine work, do not carry out the torque limited that motor discharge exceeds standard.
When subtracting that moment of torsion control module 4 receives that discharge exceeds standard or other of laws and regulations requirement activate torque limiter instructions; be that control relay 6 closures, relay 5 disconnect (temperature transducer 1 is by short circuit); now; the temperature value that enters engine controller (EECU) 3 is the resistance value (this resistance value is set to engine thermal protection temperature in engine controller (EECU) 3) that subtracts moment of torsion resistance 2; engine controller (EECU) 3 reinstates temperature excessive heat protective function, by heat protection function, realizes OBD torque limiting function.
The resistance that subtracts moment of torsion resistance 2 wants corresponding heat protection curve in binding engine controller (EECU) 3 to choose, preferably higher than 50% and lower than the corresponding resistance of temperature of 60% engine thermal protective system torque limited.
Embodiment two,
As shown in Figure 2, in shunt resistor scheme, specifically comprising of this electric-control motor OBD torque limited system: temperature transducer 21, subtract moment of torsion resistance 22, engine controller (EECU) 23 and subtract moment of torsion control module 24, and subtracting the relay 25 of moment of torsion control module 24 control connections with this.Temperature transducer 21 is cooling-water temperature sensor, fuel temperature sensor, intake air temperature sensor or oil temperature sensor, and its input end is connected with the output terminal of engine controller (EECU) 23 by the temperature signal bundle of inputs 26; Output terminal is connected with the input end of engine controller (EECU) 23 by the temperature signal bundle of outputs 27.
After subtracting moment of torsion resistance 22 and connecting with relay 25, in parallel with temperature transducer 21 again, switching by relay 25 can control relay 25 access whether in parallel subtract moment of torsion resistance 22, and using its rear total resistance value in parallel as a certain temperature signal value input engine controller (EECU) 23.
Subtract moment of torsion control module 24 respectively with the input end control connection of relay 25, and can car load be discharged and be detected by row's temperature signal, NOx sensor signal and the reprocessing controller internal calculation program of electric-control motor SCR system, then according to the break-make of testing result control relay 25.
When subtracting that moment of torsion control module 24 does not receive that discharge exceeds standard or other of laws and regulations requirement activate torque limiter instructions; be that control relay 25 disconnects (subtract moment of torsion resistance 22 and be not incorporated to temperature transducer 21); now; enter temperature value (resistance value of temperature transducer 21) or the actual value of temperature transducer 21 of engine controller (EECU) 23; the actual value of this temperature transducer 21 does not arrive the setting value of engine controller (EECU) 23 temperature protection; engine work, does not carry out the torque limited that motor discharge exceeds standard.
When subtracting that moment of torsion control module 24 receives that discharge exceeds standard or other of laws and regulations requirement activate torque limiter instructions; be control relay 25 closures (subtract moment of torsion resistance 22 and be incorporated to temperature transducer 21); now; the temperature value that enters engine controller (EECU) 23 is to subtract the resistance value (this resistance value engine controller (EECU) 23 in be set to engine thermal protection temperature) of moment of torsion resistance 22 after in parallel with temperature transducer 21; engine controller (EECU) 23 reinstates temperature excessive heat protective function, by heat protection function, realizes OBD torque limiting function.
The resistance that subtracts moment of torsion resistance 22 wants corresponding heat protection curve in binding engine controller (EECU) 23 to choose, preferably higher than 50% and lower than the corresponding resistance of temperature of 60% torque limited.
This electric-control motor OBD torque limited system also comprises: be arranged on and subtract moment of torsion control module 24 and the spring return function device that subtracts the joint of moment of torsion resistance 22 wire harness in parallel, this spring return function apparatus function for making parallel connection subtract two terminal shortcircuits of moment of torsion resistance 22 wire harness after subtracting 24 dismountings of moment of torsion control module, after mounting torque limiting module, owing to being that hard connection can disconnect the two ends of shunt resistor wire harness, prevent that the moment of torsion control module 24 that subtracts of this electric-control motor OBD torque limited system from arbitrarily being removed.
This electric-control motor OBD torque limited method is controlled and is subtracted moment of torsion resistance and whether access electric-control motor thermal protection system according to car load discharge testing result by subtracting moment of torsion control module; thereby will subtract moment of torsion resistance, replace the former temperature transducer of electric-control motor thermal protection system to transmit heat protection actuating signal to engine controller (EECU), to realize OBD torque-limiting function.This electric-control motor OBD torque limited system applied widely, goes for having on all electric-control motors of heat protection function; Cost advantage is obvious; The automatical control system of state III motor, can realize OBD torque-limiting function by simple demarcation, reduces state IV, state V engine development cost.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (7)
1. an electric-control motor OBD torque limited system, it is characterized in that, comprise: temperature transducer, subtract moment of torsion resistance, engine controller and subtract moment of torsion control module, and with described subtract moment of torsion control module control connection subtract moment of torsion resistance relay, described temperature transducer and engine controller are connected to form electric-control motor thermal protection system; The described moment of torsion resistance that subtracts accesses described engine thermal protective system by the described moment of torsion resistance relay serial or parallel connection that subtracts, described in subtract moment of torsion control module input end be connected with NOx sensor with electric-control motor SCR system.
2. electric-control motor OBD torque limited system according to claim 1, is characterized in that: described in while subtracting the described engine thermal protective system of moment of torsion resistance series connection access, described in subtract moment of torsion resistance relay and comprise: the first relay and the second relay; The input end of described temperature transducer is connected with the output terminal of described engine controller by the first temperature signal bundle of inputs, its output terminal by the second temperature signal bundle of outputs with described in subtract moment of torsion resistance and connect after, then be connected with the input end of engine controller; Described in the movable contact of described the first relay output end and stationary contact are connected respectively to, subtract the two ends of moment of torsion resistance, the movable contact of described the second relay output end and stationary contact be connected respectively to described temperature transducer input end and output terminal.
3. electric-control motor OBD torque limited system according to claim 1, is characterized in that: described in while subtracting the described engine thermal protective system of moment of torsion resistance access in parallel, described in subtract moment of torsion resistance relay and comprise: the 3rd relay; The input end of described temperature transducer is connected with the output terminal of engine controller, and output terminal is connected with the input end of engine controller; Described subtract moment of torsion resistance and connect with the 3rd relay after, more in parallel with described temperature transducer.
4. electric-control motor OBD torque limited system according to claim 3, is characterized in that: also comprise: described in being arranged on, subtract moment of torsion control module and the spring return function device that subtracts the joint of moment of torsion resistance wire harness.
5. electric-control motor OBD torque limited system according to claim 1, is characterized in that: described temperature transducer is cooling-water temperature sensor, fuel temperature sensor, intake air temperature sensor or oil temperature sensor.
6. according to the electric-control motor OBD torque limited system described in any one in claim 1 to 5, it is characterized in that: described in subtract moment of torsion resistance resistance choose higher than 50% and lower than the corresponding resistance of engine thermal protective system torque limited temperature described in 60%.
7. an electric-control motor OBD torque limited method for the above-mentioned electric-control motor OBD torque limited system of application, is characterized in that, comprises the following steps:
Step 1: subtract the discharge of moment of torsion control module reception car load and carry out testing signal;
Step 2: subtract moment of torsion control module and judge whether car load discharge exceeds standard, and send break-make instruction and subtract moment of torsion resistance and whether access electric-control motor thermal protection system to control to subtracting moment of torsion resistance relay,
When car load discharge exceeds standard, subtract the control of moment of torsion control module and subtract moment of torsion resistance access electric-control motor thermal protection system, then substitute temperature transducer and protect actuating signal to engine controller transmission heat;
Step 3: starting torque limitation function after engine controller reception heat protection actuating signal.
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| CN201310082197.3A CN104047720B (en) | 2013-03-15 | 2013-03-15 | Electric-control motor OBD torque limit system and method thereof |
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| CN104047720B CN104047720B (en) | 2016-06-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106567766A (en) * | 2016-08-31 | 2017-04-19 | 潍柴动力股份有限公司 | Method and device for detecting in-use conformity |
| CN112172815A (en) * | 2019-07-02 | 2021-01-05 | 郑州宇通客车股份有限公司 | Vehicle and driving performance limiting control method for emission fault of vehicle |
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| CN2254603Y (en) * | 1995-08-02 | 1997-05-21 | 王红波 | Universal light forward-backward coverting controlling box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106567766A (en) * | 2016-08-31 | 2017-04-19 | 潍柴动力股份有限公司 | Method and device for detecting in-use conformity |
| CN112172815A (en) * | 2019-07-02 | 2021-01-05 | 郑州宇通客车股份有限公司 | Vehicle and driving performance limiting control method for emission fault of vehicle |
| CN112172815B (en) * | 2019-07-02 | 2021-12-21 | 郑州宇通客车股份有限公司 | Vehicle and driving performance limiting control method for emission fault of vehicle |
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