Abstract: This paper describes the verification of on-board diagnostic system for light national Ⅵ gasoline vehicles in combination with national standards. Through systematic sorting and classification, the verification of on-board diagnostic system is divided into two categories: static on-board diagnostic system verification and dynamic on-board diagnostic system verification, and the overall verification process is established to verify the vehicle inspection, static on-board diagnostic system verification content, dynamic on-board diagnostic system verification content and some system principles, the key inspection contents of the whole vehicle, such as the inspection list of the whole vehicle and the information checklist of key environmental protection parts, are established, and the solutions to the problems of high exhaust temperature caused by heavy engine load when the light national VI gasoline vehicle is running and abnormal pollutants caused by burning the exhaust gas collection connecting hose in the laboratory are described. The verification method described in this paper is used to verify the vehicle, which can effectively improve the verification efficiency,accuracy and integrity of on-board diagnostic system verification.

Key words: Light truck; Gasoline engine; On-board diagnostic system

摘要： 论文结合国家标准对轻型国六汽油车车载诊断系统验证进行阐述，通过系统整理分类， 将车载诊断系统验证分为静态车载诊断系统验证、动态车载诊断系统验证两大类，并建立整 体的验证流程，对验证车辆检查、静态车载诊断系统验证内容、动态车载诊断系统验证内容 及部分系统原理、验证注意事项等进行了说明，建立了整车检查表、环保关键零部件信息检 查表等整车关键检查内容，并阐述了轻型国六汽油车行驶时发动机负荷较大，导致排气温度 高，烧坏试验室尾气采集连接软管导致污染物异常问题的解决方案，采用此论文说明的验证 方法对车辆进行验证，可有效提升车载诊断系统验证的验证效率、验证准确性及验证的完整 性。

关键词: 轻型卡车；汽油机；车载诊断系统