Through engine bench test,the effects of exhaust tailpipe fuel injection frequency and hydrocarbon mixer on diesel oxidation catalyst(DOC)hydrocarbon conversion performance were studied under the fixed inlet temperature of DOC and diesel particulate filter(DPF),and the mechanical properties of DOC performance were obtained,which was verified by the vehicle.The experimental results show that the DPF inlet temperature and the amount of hydrocarbon injection are well controlled,the parking regeneration efficiency is up to 94%,the driving regeneration efficiency is up to 90%,and the fuel consumption of the vehicle is improved by 3.3%.
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