Method and device for diagnosing automotive electronic control unit faults based on semi-physical simulation

An automotive electronic control unit and semi-physical simulation technology, which is applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve problems such as costing a lot of manpower and time, delaying repairs, wiring harness laying, and complicated trends , to achieve the effect of reducing maintenance cost, reducing maintenance workload, and narrowing the scope of troubleshooting

Inactive Publication Date: 2012-07-11
SHANGHAI UNIV OF ENG SCI +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the narrow and compact installation locations of automotive sensors and actuators, the laying and routing of wiring harnesses is very complicated, and sometimes repairs are delayed because there are no qualified replacement par

Method used

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  • Method and device for diagnosing automotive electronic control unit faults based on semi-physical simulation
  • Method and device for diagnosing automotive electronic control unit faults based on semi-physical simulation
  • Method and device for diagnosing automotive electronic control unit faults based on semi-physical simulation

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[0031] Example

[0032] like figure 1 As shown in the figure, a method for diagnosing faults of automobile electronic control unit based on semi-physical simulation, the method includes the following steps:

[0033] Step 101) The tester selects a set condition in the standard database through the human-computer interaction interface. The establishment of the standard database includes the following steps: 11) The high-speed processing PC calls the standard database read-in function, collects the output of the known standard target electronic control unit, and performs system identification between the input of the working condition and the output of the standard target electronic control unit. , establish the corresponding standard electronic control unit input-output; 12) sample the standard output of 3 to 5 known standard target electronic control units of the same model under the input described in step 11) to obtain the allowable deviation of the standard output; 13 ) Ch...

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Abstract

The invention relates to a method and a device for diagnosing automotive electronic control unit faults based on semi-physical simulation. The method comprises the steps that (1) a personal computer (PC) and a control system send standard input information to an electronic control unit to be detected and send standard output response information to a fault diagnosis and display module; (2) the electronic control unit to be detected processes and sends out the output response information; (3) the fault diagnosis and display module compares the standard output response information with output response information of electronic control unit (ECU) to be detected to draw a conclusion whether the electronic control unit to be detected breaks down; and (4) changing some input information, and diagnosing fault properties of the electronic control unit to be detected. The device comprises the PC, the control system and a simulation controller. Compared with the prior art, by means of the method and the device for diagnosing the automotive electronic control unit faults based on the semi-physical simulation, the fault clearing flow of an automotive electronic control is greatly simplified, the fault clearing range is narrowed, the fault diagnosis rate is further improved, maintenance workload result from diagnosis of replacement parts and fund employment amount of stock parts are effectively reduced, thus the maintenance cost is greatly reduced.

Description

technical field [0001] The invention relates to a method and a device for an automobile fault, in particular to a method and a device for diagnosing a fault of an electric control unit of an automobile based on semi-physical simulation. Background technique [0002] The fault diagnosis of the automobile electronic control system is generally through the special fault diagnosis interface on the car, and the decoder is used to read the fault code output from the automobile ECU (electronic control unit), explain the fault code, and display the fault content. This diagnosis mode is a passive reading fault diagnosis mode, and cannot diagnose the internal faults and dynamic faults of the ECU. Automotive ECU fault codes can be generated in the following aspects: 1. The sensor itself is faulty, that is, the sensor cannot work normally; 2. The signal transmission medium is faulty, that is, the car wiring harness is short-circuited and the circuit is faulty; 3. Internal hardware fault...

Claims

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Application Information

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IPC IPC(8): G05B23/00
Inventor 郑霞君宋安龚元明赵超罗素云
Owner SHANGHAI UNIV OF ENG SCI
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