重型柴油机SCR后处理系统在线故障诊断功能的开发

摘要

According to the requirements of national regulation HJ 437-2008 on the on-board diagnostics ( OBD) of emissions for heavy-duty vehicle, the OBD functions of selective catalytic reduction after-treatment system based on both NO, and Adblue tests are developed for heavy-duty diesel engine, and verified by the hardware-in the-loop simulation test with its communication mode confirming to SAE J1939 standard.%根据国家法规HJ 437-2008中对重型车排放在线故障诊断(OBD)的要求,为重型柴油机分别开发了基于NOx检测和Adblue检测的尿素选择催化还原(SCR)后处理系统的OBD功能,并得到硬件在环仿真试验的验证,其通信模式符合SAE J1939标准.