摘要
针对电控柴油机诊断和维修较难的问题,采用车载自动诊断(OBD)系统对电控柴油机进行了管理。根据我国最新排放法规,分析了催化转化器效率、氧传感器故障、燃油喷射系统故障以及其他与排放相关部件的监测等电控柴油机OBD系统主要的监测需求;其次,通过对柴油共轨ECU对电路连接故障的监测、子系统可信度监测、故障灯的管理、故障确认的一般流程,及存储管理、OBD系统认证时可模拟的故障等实现过程进行了综合性描述,全面给出了柴油机OBD系统管理过程;最后,在柴油机高压油泵电磁阀上完成了实际的故障诊断试验。研究结果表明,在电控柴油机出现故障时,ECU能够通过OBD系统及时完成检测并对柴油机采取保护措施。
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.
出处
《机电工程》
CAS
2015年第2期265-269,共5页
Journal of Mechanical & Electrical Engineering
关键词
电控柴油机
车载诊断系统
电子控制单元
监测
故障
electronically controlled diesel engine
on-board diagnostics （OBD） system
electronic control unit （ECU）
monitoring
fault
