CN101968654B - Gas driving diagnostic method and device based on dual-fuel system - Google Patents
Gas driving diagnostic method and device based on dual-fuel system Download PDFInfo
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- CN101968654B CN101968654B CN2010105000461A CN201010500046A CN101968654B CN 101968654 B CN101968654 B CN 101968654B CN 2010105000461 A CN2010105000461 A CN 2010105000461A CN 201010500046 A CN201010500046 A CN 201010500046A CN 101968654 B CN101968654 B CN 101968654B
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- 238000002405 diagnostic procedure Methods 0.000 title claims description 6
- 239000000446 fuel Substances 0.000 title abstract description 3
- 238000004891 communication Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 24
- 238000003745 diagnosis Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000295 fuel oil Substances 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 54
- 238000000034 method Methods 0.000 description 10
- 239000000567 combustion gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The invention relates to a gas driving diagnostic system based on a dual-fuel system, which is characterized by comprising the following devices: a motor control unit, a gas driving device, a microcontroller and a hardware detecting unit, wherein the motor control unit is used for communicating with the gas driving device, judging whether the gas driving device is operated normally, and resolving signals transmitted by the gas driving device; the gas driving device comprises a CAN module which is used for carrying out vehicle CAN communication and transmitting the information received by the microcontroller to the motor control unit; the microcontroller receives and transmits nozzle state information to the CAN module; and the hardware detecting unit detects and transmits the state information of a gas nozzle to the microprocessor.
Description
Technical field
The present invention relates to the automotive diagnostic system field, particularly a kind of dual-fuel automobile combustion gas diagnostic system field that is used for.
Background technology
Along with developing of automobile industry; Position in the in-circuit diagnostic system automobile services system in modern times is also more and more important; It is according to the requirement in the national standard 18352; Concentrating and to carry out fault diagnosis and information transmission, is the major technique foundation of fault diagnosis in the vehicle maintenance, is car gageization, integrated embodiment.At present; The inline diagnosis function of bifuel system combustion gas diagnostic system is to be defined voluntarily by each combustion gas repacking producer; Cause each producer's combustion gas DTC implication, read and being not quite similar of removing method; Cause inconvenience for after sale service, the maintenance of automobile, do not meet the needs that the Hyundai Motor structure is integrated, the standardization direction develops.
For solving the deficiency of above-mentioned bifuel system combustion gas diagnostic system; Gas burning system diagnosis of the present invention is the inline diagnosis mode that requires formulation according to national standard 18352; Make and adopt the accurate diagnostic instrments of a station symbol; The vehicle of various different brands, different model overhauled becomes possibility, has improved the repair quality of automobile, improves the accuracy and the work efficiency of fault diagnosis.
Summary of the invention
The object of the present invention is to provide a kind of reliably, cheaply based on the gas driven method of diagnosing and the device of bifuel system, the transmitter control module is not being carried out utilizing original CAN communication to diagnose on the basis that any hardware changes.
Concrete technical scheme is following:
A kind of gas driven diagnostic system based on bifuel system; It is characterized in that it is by forming like lower device: control unit of engine is used for communicating with the gas driven device; Judge whether operate as normal of gas driven device, resolve the signal that the gas driven device sends; The gas driven device comprises with lower module: the CAN module, be used to carry out automobile CAN communication, and give control unit of engine with the information transmission that microcontroller receives; Microcontroller, the fanging noz(zle) status information, and send to the CAN module; Hardware detection unit detects the status information of gas nozzle, and sends to microprocessor.
Preferably, if control unit of engine can detect the gas driven device by the CAN signal that stipulated form sends, think that then the gas driven device is in proper working order.
Preferably, if judge that the gas driven device is in proper working order, then in the gas driven device, adopt hardware detection unit that gas nozzle is detected in real time.
Preferably; In the gas driven device, adopt dual power supply independently-powered to disparate modules, the relay of leading up to is supplied power to gas driven, when the fuel oil state; Break off this power supply; Another road supplies power to hardware detection unit, microcontroller, CAN module through ignition switch, as long as engine powers on, power supply is switched on.
Preferably; The hardware detection unit feedack is passed to control unit of engine; Control unit of engine carries out fault handling according to the diagnostic message of gas driven device feedback by national standard 18352 requirements, generates DTC and lights the inline diagnosis trouble light.
Preferably, said fault comprises and opening circuit, lacks ground, short power supply, or the like.
Preferably, when gas nozzle broke down, the hardware detection unit status information of gas nozzle at this moment fed back to microcontroller, and microcontroller through the CAN control module, passes to control unit of engine with the hardware detection unit feedack again.
A kind of gas driven diagnostic method based on bifuel system is characterized in that it comprises the steps: steps A: after system's power supply, control unit of engine and gas driven device communicate; Step B: if the gas driven device is good, then its hardware detection unit is monitored gas nozzle in real time; Step C: hardware detection unit is given microcontroller the gas nozzle feedback of status that current detection arrives; Step D: microcontroller sends to the CAN module with the gas nozzle state that receives; Step e: the CAN module is sent signal according to the information of resolving the microcontroller transmission and is given control unit of engine; Step F: control unit of engine is resolved the signal that the CAN module is sent, and gives me a little bright corresponding inline diagnosis trouble light.
Preferably, among the said step C state comprise open circuit, short ground, short power supply, or the like.
Preferably, control unit of engine carries out fault handling according to the diagnostic message of gas driven device feedback by national standard 18352 requirements in the said step F, generates DTC and lights the inline diagnosis trouble light.
Description of drawings
Fig. 1 is the gas driven diagnostic device theory diagram based on bifuel system of the present invention;
Fig. 2 is the gas driven diagnostic method process flow diagram based on bifuel system of the present invention.
Embodiment
Describe the present invention according to accompanying drawing below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
The objective of the invention is to, propose a kind of method and apparatus based on the inline diagnosis of control unit of engine dual-fuel gas driven.
It is characterized in that:
1, control unit of engine is communicated by letter and is judged whether normally whether the gas driven device is in proper working order with CAN between the gas driven device through inspection; If control unit of engine can detect the gas driven device by the CAN signal that stipulated form sends, think that then the gas driven device is in proper working order.
If 2 judge that in 1 the gas driven device is in proper working order; Then in the gas driven device, adopt hardware detection unit that gas nozzle is detected in real time; When opening circuit appears in gas nozzle, when short ground, short power supply, other fault, hardware detection unit will this moment the status information of gas nozzle feed back to microcontroller, microcontroller is again through the CAN control module; The hardware detection unit feedack is passed to control unit of engine; Control unit of engine carries out fault handling according to the diagnostic message of gas driven device feedback by national standard 18352 requirements, generates DTC and lights the inline diagnosis trouble light.
To achieve these goals, the method that the present invention adopts is: in the gas driven device, adopt dual power supply independently-powered to disparate modules, the relay of leading up to is supplied power to gas driven; Promptly when the fuel oil state, break off this power supply, another road supplies power to hardware detection unit, micro control system, CAN module through ignition switch; As long as engine powers on; Power supply is switched on, even like this under the fuel oil state, also can detect the gas nozzle state in real time; Thereby guarantee that gas nozzle is in good condition when getting into the combustion gas state.
Further describe with 2 couples of the present invention of process flow diagram below in conjunction with attaching schematic diagram 1.
As shown in Figure 1, shown device is carried out method flow as shown in Figure 2:
1, after system's power supply, control unit of engine and gas driven device communicate;
2, if the gas driven device is good, then its hardware detection unit is monitored gas nozzle in real time;
3, hardware detection unit is given microcontroller the gas nozzle feedback of status that current detection arrives;
4, microcontroller sends to the CAN module with the gas nozzle state that receives;
5, the CAN module is sent signal according to the information of resolving the microcontroller transmission and is given control unit of engine;
6, control unit of engine is resolved the signal that the CAN module is sent, and gives me a little bright corresponding inline diagnosis trouble light.
The content of not doing in this explanation to describe in detail belongs to this area professional and technical personnel's known prior art
Advantage of the present invention:
1. diagnosis in proper working order is to detect the mode whether the gas driven device can normally send the CAN signal through control unit of engine to carry out to the gas driven device; Utilized the original function that communication is diagnosed to CAN of control unit of engine, simple;
2. the hardware diagnostic of the state of gas nozzle is undertaken by the gas driven device, need not carry out any hardware to control unit of engine and change;
3. the diagnostic message of gas nozzle sends to control unit of engine by the gas driven device through CAN and carries out Unified Treatment; The in-circuit diagnostic system of having utilized the original National standard 18352 of control unit of engine to require; Implementation is simple, and the software alteration workload of control unit of engine is little, and the diagnosis of system of diagnosis and the gasoline of gas burning system is integrated; National standard 18352 requirements can use the diagnostic equipment of standard to carry out diagnostic operation.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (4)
1. gas driven diagnostic system based on bifuel system is characterized in that it is by forming like lower device:
Control unit of engine is used for communicating with the gas driven device, judges whether operate as normal of gas driven device, resolves the signal that the gas driven device sends; If control unit of engine can detect the gas driven device by the CAN signal that stipulated form sends, think that then the gas driven device is in proper working order; If judge that the gas driven device is in proper working order, then in the gas driven device, adopt hardware detection unit that gas nozzle is detected in real time; When gas nozzle broke down, the hardware detection unit status information of gas nozzle at this moment fed back to microcontroller, and microcontroller through the CAN control module, passes to control unit of engine with the hardware detection unit feedack again; Control unit of engine carries out fault handling according to the diagnostic message of gas driven device feedback by national standard 18352 requirement, generates DTC and also lights the inline diagnosis trouble light, and said fault comprises and opening circuit, short ground and weak point power supply;
The gas driven device comprises with lower module:
The CAN control module is used to carry out automobile CAN communication, gives control unit of engine with the information transmission that microcontroller receives;
Microcontroller, the fanging noz(zle) status information, and send to the CAN control module;
Hardware detection unit detects the status information of gas nozzle, and sends to microprocessor; In the gas driven device, adopt dual power supply independently-powered to disparate modules; The relay of leading up to is supplied power to gas driven; When the fuel oil state, break off this power supply, another road supplies power to hardware detection unit, microcontroller, CAN control module through ignition switch; As long as engine powers on, power supply is switched on.
2. one kind according to claim 1 based on the diagnostic method of the gas driven diagnostic system of bifuel system, it is characterized in that, comprises the steps:
Steps A: after system's power supply, control unit of engine and gas driven device communicate;
Step B: if the gas driven device is good, then its hardware detection unit is monitored gas nozzle in real time;
Step C: hardware detection unit is given microcontroller the gas nozzle feedback of status that current detection arrives;
Step D: microcontroller sends to the CAN control module with the gas nozzle state that receives;
Step e: the CAN control module is sent signal according to the information of resolving the microcontroller transmission and is given control unit of engine;
Step F: control unit of engine is resolved the signal that the CAN control module is sent, and gives me a little bright corresponding inline diagnosis trouble light.
3. the diagnostic method of the gas driven diagnostic system based on bifuel system as claimed in claim 2 is characterized in that, among the said step C state comprise open circuit, short ground, short power supply.
4. the diagnostic method of the gas driven diagnostic system based on bifuel system as claimed in claim 2; It is characterized in that; Control unit of engine is according to the diagnostic message of gas driven device feedback in the said step F; Carry out fault handling by national standard 18352 requirements, generate DTC and light the inline diagnosis trouble light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105000461A CN101968654B (en) | 2010-09-30 | 2010-09-30 | Gas driving diagnostic method and device based on dual-fuel system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105000461A CN101968654B (en) | 2010-09-30 | 2010-09-30 | Gas driving diagnostic method and device based on dual-fuel system |
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| Publication Number | Publication Date |
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| CN101968654A CN101968654A (en) | 2011-02-09 |
| CN101968654B true CN101968654B (en) | 2012-11-28 |
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| CN2010105000461A Active CN101968654B (en) | 2010-09-30 | 2010-09-30 | Gas driving diagnostic method and device based on dual-fuel system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102015105134A1 (en) * | 2015-04-02 | 2016-10-06 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Control unit for connecting a CAN bus to a radio network and motor vehicle with such a control unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201334953Y (en) * | 2009-01-13 | 2009-10-28 | 北京沃托玛腾机械制造有限公司 | Electrically controlled multi-point sequential injection system of liquefied petroleum gas automobile engine |
| CN201376493Y (en) * | 2009-03-24 | 2010-01-06 | 重庆恒通客车有限公司 | Electric control diesel / natural gas dual-fuel environment-friendly coach |
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2010
- 2010-09-30 CN CN2010105000461A patent/CN101968654B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201334953Y (en) * | 2009-01-13 | 2009-10-28 | 北京沃托玛腾机械制造有限公司 | Electrically controlled multi-point sequential injection system of liquefied petroleum gas automobile engine |
| CN201376493Y (en) * | 2009-03-24 | 2010-01-06 | 重庆恒通客车有限公司 | Electric control diesel / natural gas dual-fuel environment-friendly coach |
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| Publication number | Publication date |
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| CN101968654A (en) | 2011-02-09 |
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