摘要：针对轻型车国六排放标准中新增车载诊断（on board diagnostics，OBD）系统认证项目——量产车辆评估（production vehicle evaluation,PVE）测试，介绍PVE测试方法及相关要求，分析OBD故障码分类原则和诊断原理，介绍不同故障类别的测试实例，分析PVE J2测试方法及难点，总结故障模拟方法。分析结果表明：熟悉故障诊断原理是故障码分类的基础，根据传感器和执行器的工作原理和信号类别合理选择故障植入所需设备，结合故障诊断所需边界条件，完成测试。该分析可为行业企业进行PVE测试提供参考。
Abstract：In view of the newly added on board diagnostics (OBD) system certification in the CHINA 6 emission standards for production vehicle evaluation (PVE) testing, the PVE test method and related requirements are introduced, and the OBD fault code classification principle as well as diagnosis principles are analyzed. The test examples of different fault categories is introduced, PVE J2 test methods and difficulties are analyzed and the fault simulation methods are summarized. The analysis results show that familiarity with the principle of fault diagnosis is the basis of fault code classification. According to the working principle and signal category of sensors and actuators, the equipment required for fault implantation is reasonably selected, and the boundary conditions required for fault diagnosis are combined to complete the test one by one. These works can provide reference for industry enterprises to conduct PVE testing.
Keywords:OBD; PVE; failure simulation