CN203502534U - Circuit fault simulation device for automobile engine management system - Google Patents
Circuit fault simulation device for automobile engine management system Download PDFInfo
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- CN203502534U CN203502534U CN201320626950.6U CN201320626950U CN203502534U CN 203502534 U CN203502534 U CN 203502534U CN 201320626950 U CN201320626950 U CN 201320626950U CN 203502534 U CN203502534 U CN 203502534U
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- 238000004088 simulation Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000012546 transfer Methods 0.000 claims description 14
- 238000011161 development Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000001419 dependent effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 2
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Abstract
The utility model discloses a circuit fault simulation device for an automobile engine management system. The device comprises a plurality of test circuit sets; one end of each test circuit set is connected with an ECU, and the other end is connected with a wire harness end of a sensor in the engine or a wire harness end of an executer in the engine; and each test circuit set comprises a mode selection switch, a circuit fault type selection switch, a slide rheostat and a resistor mode selection switch. According to the circuit fault simulation device for the automobile engine management system, multi-gear selection switches are adopted in match with relative fault circuits integrated inside, thereby realizing normal, quick and safe simulation on faults of power supply short circuit, ground short circuit and signal open circuit, realizing simulation on rational faults of sensor signals and functional faults of executer signals, greatly improving the matching development efficiency of an OBD system, and improving security of circuit fault simulation.
Description
Technical field
The utility model is relevant with the fault diagnosis of motor car engine, specifically belongs to a kind of automobile engine management system circuit failure simulation device.
Background technology
Engine management system (EMS) comprises multiple parts, as various sensors (pressure transducer, temperature sensor etc.) and actuator (as fuel injector) etc., the fault of these parts detects the basic demand that belongs to in-circuit diagnostic system in Abgasgesetz (OBD), vehicle after-sales maintenance service at present also relies on the dependent failure information that OBD system provides strongly, therefore, the coupling exploitation of OBD system, especially the coupling of associated components circuit fault diagnosis exploitation is the important content of engine management system coupling exploitation.In order to guarantee that OBD system detects the interlock circuit fault of each parts effectively, in the coupling performance history of OBD system, just need to simulate repeatedly in a large number the situation of all parts generation all kinds fault, comprising circuit open circuit, to the rationality fault of power supply short circuit, shorted to earth and related sensor and the functional fault of actuator.
At present, the simulation of various faults is generally by Signal transfer box, concrete operations are corresponding PIN pin of pulling out as required Signal transfer box, then by the mode of fly line carry out ECU signal end open circuit, be shorted to power supply, be shorted to ground wire, with the circuit open circuit of each parts in simulated engine management system (sensor, actuator etc.), to faults such as power supply short circuit, shorted to earths.Because the wire harness configuration of each vehicle and each engine model is different, wire harness schematic diagram is various, this method not only expends time in but also easily make mistakes, in simulation process, by fly line mode, simulate each component circuitry fault unordered in a jumble, and very easily because fly line mistake is damaged module and the related sensor (actuator) of electronic controller.Meanwhile, for the Functional Fault Simulation of relevant sensor signals rationality fault or actuator, need to, by the extra equipment such as resistance box, operate inconvenience and waste time and energy.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of automobile engine management system circuit failure simulation device; can realize quickly and safely the simulation to various faults; improve the coupling development efficiency of OBD system, promote the security of circuit failure simulation and protect module and the automotive components of electronic controller.
For solving the problems of the technologies described above, the automobile engine management system circuit failure simulation device that the utility model provides has some cover test circuits, one end and the ECU of every cover test circuit join, and in the other end and engine, the wire harness end of a sensor or the wire harness end of an actuator join;
Every cover test circuit comprises a mode selection switch and a fault type selecting switch, wherein mode selection switch has normal mode and two gears of fault mode, and fault type selecting switch has maximum fault, minimum fault and three gears of open fault;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault, ECU and a supply voltage join, and the wire harness end of sensor or the wire harness end of actuator are unsettled;
When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled;
When mode selection switch is in fault mode gear and fault type selecting switch during in open fault, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled.
Wherein, described mode selection switch and fault type selecting switch are toggle switch or rotary switch.
Preferably, described device is a Signal transfer box, and this Signal transfer box has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end.
The utility model also provides a kind of automobile engine management system circuit failure simulation device to have some cover test circuits, and one end and the ECU of every cover test circuit join, and in the other end and engine, the wire harness end of a sensor or the wire harness end of an actuator join;
Every cover test circuit comprises a mode selection switch, fault type selecting switch, a slide rheostat and a resistance mode selector switch, wherein mode selection switch has normal mode, fault mode and three gears of resistance mode, fault type selecting switch has maximum fault, minimum fault and three gears of open fault, slide rheostat is connected with resistance mode selector switch, and resistance mode selector switch has resistance in series and two gears of parallel resistance;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault gear, ECU and a supply voltage join, and the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault gear, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in open fault gear, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled;
When mode selection switch is in resistance mode gear and resistance mode selector switch during in resistance in series gear, ECU, slide rheostat and sensor or actuator series connection; When mode selection switch is in resistance mode gear and resistance mode selector switch during in parallel resistance gear, the wire harness end of sensor or the wire harness end of actuator are unsettled, and ECU connects with slide rheostat and joins with a supply voltage.
Wherein, described mode selection switch, fault type selecting switch and resistance mode selector switch are toggle switch or rotary switch.
Preferably, described device is a Signal transfer box, and this Signal transfer box has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end.
Automobile engine management system circuit failure simulation device of the present utility model adopts many grades of selector switch, coordinate and be integrated in inner dependent failure circuit, realized the conventional simulation fast and safely to power supply short circuit, shorted to earth and signal open-circuit fault, and can realize the simulation of sensor signal rationality fault and actuator signal functional fault, the coupling development efficiency that has greatly improved OBD system, has promoted the security of circuit failure simulation.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory diagrams of circuit failure simulation device of the present utility model;
Fig. 2 is the outside schematic diagram of the circuit failure simulation device of circuit shown in Fig. 1
Fig. 3 is the another kind of circuit theory diagrams of circuit failure simulation device of the present utility model;
Fig. 4 is the outside schematic diagram of the circuit failure simulation device of circuit shown in Fig. 3.
Wherein description of reference numerals is as follows:
A1, B1 are mode selection switch; A2, B2 are fault type selecting switch; S1, S2 are resistance mode selector switch; R1, R2 are slide rheostat.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
The first embodiment of the circuit failure simulation device that the utility model provides, as shown in Figure 1, automobile engine management system circuit failure simulation device has some cover test circuits, a sensor or the actuator of every cover test circuit in can test engine, therefore one end and the ECU of every cover test circuit join, in the other end and engine, the wire harness end of a sensor or the wire harness end of an actuator join.
Every cover test circuit comprises a mode selection switch and a fault type selecting switch, wherein mode selection switch has normal mode and two gears of fault mode, and fault type selecting switch has maximum fault, minimum fault and three gears of open fault;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault, ECU and a supply voltage join, the wire harness end of sensor or the wire harness end of actuator are unsettled, now to power supply short circuit, can maximum fault occur analog component;
When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled, and can there is minimum fault by analog component in shorted to earth now;
When mode selection switch is in fault mode gear and fault type selecting switch during in open fault, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled, and now signal open circuit can analog component generation open fault.
As shown in Figure 2, this failure simulation device is a Signal transfer box, and this Signal transfer box has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end (comprising the wire harness end of each sensor, the wire harness end of actuator).Mode selection switch A1, B1 and fault type selecting switch A2, B2 are toggle switch or rotary switch.
The second embodiment of the circuit failure simulation device that the utility model provides, as shown in Figure 3, be with the first embodiment difference, except comprising mode selection switch and fault type selecting switch, every cover test circuit also comprises a slide rheostat and a resistance mode selector switch, now mode selection switch has increased resistance mode gear, and slide rheostat is connected with resistance mode selector switch, and resistance mode selector switch has resistance in series and two gears of parallel resistance;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault gear, ECU and a supply voltage join, and the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault gear, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in open fault gear, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled;
When mode selection switch is in resistance mode gear and resistance mode selector switch during in resistance in series gear, ECU, slide rheostat and sensor or actuator series connection; When mode selection switch is in resistance mode gear and resistance mode selector switch during in parallel resistance gear, the wire harness end of sensor or the wire harness end of actuator are unsettled, and ECU connects with slide rheostat and joins with a supply voltage.
As shown in Figure 2, this failure simulation device is a Signal transfer box, and this Signal transfer box also has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end (comprising the wire harness end of each sensor, the wire harness end of actuator).Mode selection switch A1, B1, fault type selecting switch A2, B2, resistance mode selector switch S1, S2 are toggle switch or rotary switch.In conjunction with two-way resistance mode, can meet the demand of simultaneously simulating two unreasonable faults of parts.Certainly, also more multichannel resistance mode can be set as required, improve testing efficiency.
Automobile engine management system circuit failure simulation device of the present utility model adopts many grades of selector switch, coordinate and be integrated in inner dependent failure circuit, realized the conventional simulation fast and safely to power supply short circuit, shorted to earth and signal open-circuit fault, and can realize the simulation of sensor signal rationality fault and actuator signal functional fault, the coupling development efficiency that has greatly improved OBD system, has promoted the security of circuit failure simulation.
By specific embodiment, the utility model is had been described in detail above, this embodiment is only preferred embodiment of the present utility model, and it not limits the utility model.In the situation that not departing from the utility model principle; those of ordinary skills under the prerequisite of not making creative work to aspects such as the increases of the increase of selector switch quantity and slide rheostat by any modification, be equal to all other embodiment that the modes such as replacement, improvement obtain, in the technology category that all should be considered as protecting at the utility model.
Claims (6)
1. an automobile engine management system circuit failure simulation device, it is characterized in that, described device has some cover test circuits, and one end and the ECU of every cover test circuit join, and in the other end and engine, the wire harness end of a sensor or the wire harness end of an actuator join;
Every cover test circuit comprises a mode selection switch and a fault type selecting switch, wherein mode selection switch has normal mode and two gears of fault mode, and fault type selecting switch has maximum fault, minimum fault and three gears of open fault;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault, ECU and a supply voltage join, and the wire harness end of sensor or the wire harness end of actuator are unsettled;
When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled;
When mode selection switch is in fault mode gear and fault type selecting switch during in open fault, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled.
2. automobile engine management system circuit failure simulation device according to claim 1, is characterized in that, described mode selection switch and fault type selecting switch are toggle switch or rotary switch.
3. automobile engine management system circuit failure simulation device according to claim 2, is characterized in that, described device is a Signal transfer box, and this Signal transfer box has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end.
4. an automobile engine management system circuit failure simulation device, it is characterized in that, described device has some cover test circuits, and one end and the ECU of every cover test circuit join, and in the other end and engine, the wire harness end of a sensor or the wire harness end of an actuator join;
Every cover test circuit comprises a mode selection switch, fault type selecting switch, a slide rheostat and a resistance mode selector switch, wherein mode selection switch has normal mode, fault mode and three gears of resistance mode, fault type selecting switch has maximum fault, minimum fault and three gears of open fault, slide rheostat is connected with resistance mode selector switch, and resistance mode selector switch has resistance in series and two gears of parallel resistance;
When mode selection switch is positioned at normal mode gear, ECU is normally connected with sensor or actuator;
When mode selection switch is in fault mode gear and fault type selecting switch during in maximum fault gear, ECU and a supply voltage join, and the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in minimum fault gear, ECU ground connection, the wire harness end of sensor or the wire harness end of actuator are unsettled; When mode selection switch is in fault mode gear and fault type selecting switch during in open fault gear, ECU is unsettled, and the wire harness end of sensor or the wire harness end of actuator are also unsettled;
When mode selection switch is in resistance mode gear and resistance mode selector switch during in resistance in series gear, ECU, slide rheostat and sensor or actuator series connection; When mode selection switch is in resistance mode gear and resistance mode selector switch during in parallel resistance gear, the wire harness end of sensor or the wire harness end of actuator are unsettled, and ECU connects with slide rheostat and joins with a supply voltage.
5. automobile engine management system circuit failure simulation device according to claim 4, is characterized in that, described mode selection switch, fault type selecting switch and resistance mode selector switch are toggle switch or rotary switch.
6. automobile engine management system circuit failure simulation device according to claim 5, is characterized in that, described device is a Signal transfer box, and this Signal transfer box has two interfaces, and one of them is connected with ECU, and another is connected with engine wiring harness end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626950.6U CN203502534U (en) | 2013-10-11 | 2013-10-11 | Circuit fault simulation device for automobile engine management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320626950.6U CN203502534U (en) | 2013-10-11 | 2013-10-11 | Circuit fault simulation device for automobile engine management system |
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| CN203502534U true CN203502534U (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320626950.6U Expired - Lifetime CN203502534U (en) | 2013-10-11 | 2013-10-11 | Circuit fault simulation device for automobile engine management system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543379A (en) * | 2013-10-11 | 2014-01-29 | 联合汽车电子有限公司 | Circuit fault simulation device of vehicle engine management system |
| CN107481601A (en) * | 2017-09-13 | 2017-12-15 | 无锡商业职业技术学院 | A kind of automobile engine fault simulator |
| CN109613377A (en) * | 2019-01-11 | 2019-04-12 | 蜂巢能源科技有限公司 | Battery analog system relay status detects analog circuit and device |
| CN111736091A (en) * | 2020-05-27 | 2020-10-02 | 湖南省湘电试验研究院有限公司 | Unstable high-resistance ground fault simulation circuit based on RTDS platform and application method thereof |
| CN113138315A (en) * | 2020-01-17 | 2021-07-20 | 广州汽车集团股份有限公司 | Transmission detection device |
-
2013
- 2013-10-11 CN CN201320626950.6U patent/CN203502534U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543379A (en) * | 2013-10-11 | 2014-01-29 | 联合汽车电子有限公司 | Circuit fault simulation device of vehicle engine management system |
| CN107481601A (en) * | 2017-09-13 | 2017-12-15 | 无锡商业职业技术学院 | A kind of automobile engine fault simulator |
| CN109613377A (en) * | 2019-01-11 | 2019-04-12 | 蜂巢能源科技有限公司 | Battery analog system relay status detects analog circuit and device |
| CN113138315A (en) * | 2020-01-17 | 2021-07-20 | 广州汽车集团股份有限公司 | Transmission detection device |
| CN111736091A (en) * | 2020-05-27 | 2020-10-02 | 湖南省湘电试验研究院有限公司 | Unstable high-resistance ground fault simulation circuit based on RTDS platform and application method thereof |
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