关键词: 轻型卡车；汽油机；车载诊断系统

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