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Monitoring requirement and the management of the electronic controlled diesel OBD system

Published:2015-04-08 author:ZHANG Yue，ZHOU Wen-hua，YANG Teng-fei，GUO Xiu-qi Browse: 2923 Check PDF documents

Monitoring requirement and the management of the electronic

controlled diesel OBD system

ZHANG Yue，ZHOU Wen-hua，YANG Teng-fei，GUO Xiu-qi

（Department of Energy Engineering，Zhejiang University，Hangzhou 310027，China）

Abstract：Aiming at the diagnosis and repair of the electronic controlled diesel engine，on-board diagnostics（OBD）was used to manage

the electronic controlled diesel engine. According to the new emission regulations of the China's auto emissions standards，after the

analysis of the principal things of monitoring content in the electronic controlled diesel engine OBD system such as the efficiency of

catalytic converter，the failure of oxygen sensor，the failure of electronic fuel injection and so on. Then，by making a comprehensive

description of the circuit connection fault monitoring，subsystem reliability monitoring，the fault lamp management，the general process of

fault recognition and the fault storage management，the fault that could be simulated during the OBD system certification，the management

process of diesel engine OBD system was elaborated. Finally，the actual fault diagnosis test was completed on high pressure oil pump

solenoid valve of diesel engine. The results indicate that，once the electronic controlled diesel engine has fault，ECU can use OBD system

to complete detection and protect the diesel engine.

Key words：electronically controlled diesel engine；on-board diagnostics（OBD）system；electronic control unit（ECU）；monitoring；fault

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