Device and method for automatically testing ECU software version of heavy-duty car engine

Abstract

The invention provides a device and method for automatically testing the software version of a heavy-duty car engine ECU, and solves a problem that the unpermitted software flash which happens to the heavy-duty car engine ECU causes an unstable factor. A metal wire is used for connecting a CAN bus controller of the tested heavy-duty car engine ECU and a CAN bus controller of a detection terminal, thereby forming physical connection, and enabling the heavy-duty car engine ECU and the detection terminal to carry out information interaction through a CAN bus. The detection terminal comprises the CAN bus controller, a detection terminal CPU, a man-machine interaction device, a power module and a clock module. The detection terminal is connected with the heavy-duty car engine ECU through a handshake protocol. The heavy-duty car engine ECU returns the detection data comprising the software version number through the CAN bus, and the detection terminal enables the monitoring data returned by the heavy-duty car engine ECU to be imported into a software version logic algorithm unit, so as to detect whether the software version of the heavy-duty car engine ECU is correct and legal or not.

Description

technical field [0001] The invention belongs to the application field of automobile electronics, and in particular relates to a method and a device for automatically testing the ECU software version of a heavy-duty automobile engine. Background technique [0002] At present, the heavy-duty vehicle CAN bus control system products developed in China mainly include three parts: the central controller CU of the vehicle body, the instrument cluster IC and the vehicle body load driver. As the vehicle body central controller of the vehicle body bus gateway, on the one hand, it can realize information exchange and sharing with the electronic control unit of the vehicle powertrain such as the electronically controlled engine and the anti-lock braking system ABS / ASR; By collecting a large number of switch signals including combined light switch, wiper / washer switch, interior light switch and key switch, etc., the control function of the body electrical appliances is realized. In addi...

AI Technical Summary

Problems solved by technology

Solve the problem that the heavy-duty vehicle engine ECU has unlicensed software flashing, causing the heavy-duty vehicle engine ECU to form a software unstable factor

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