An End-of-Line Test System for Pneumatic ABS Controllers in Commercial Vehicles

Abstract

To remedy the defects of conventional pneumatic ABS (anti-lock Braking system) controller testing equipment for commercial vehicles, such as low efficiency and difficult testing condition configurations, a workflow was proposed based on the unit integration test mode. The relationship among the operation logic of the ABS valves, test conditions, and wheel speed was derived through the simulation of a multi-condition configuration. Then, a wheel speed simulation model was set up by taking the test conditions as inputs, and it was implanted into an embedded control unit. Next, the hardware module and the underlying drivers as well as an application algorithm for the application layer were designed. A prototype of the EOL (end-of-line) test system was built. The test results show that the prototype can not only achieve a rapid test condition configuration and accurate fault location but that it can also meet the requirements for test efficiency.