Influence of Diesel Engine Intake Throttle and Late Post Injection Process on the Rise of Temperature in the Diesel Oxidation Catalyst  

作　　者：Ke Sun Da Li Hao Liu Shuzhan Bai 

机构地区：[1]School of Energy and Power Engineering,Shandong University,Jinan,250061,China

出　　处：《Fluid Dynamics & Materials Processing》2020年第3期573-584,共12页流体力学与材料加工（英文）

基　　金：supported by the Ministry of Science and Technology of the People’s Republic of China[grant numbers 2017YFC0211304];the Natural Science Foundation of Shandong Province[grant number ZR2019MEE041];the Open Fund of the National Engineering Laboratory for Mobile Source Emission Control Technology[grant number NELMS2017A14].

摘　　要：In order to effectively implement DPF(Diesel Particulate Filters)regeneration control,thermal management of exhaust products before and inside Diesel Oxidation Catalyst(DOC)is necessary.In the present study,the Influence of the intake throttle valve and late post injection process on temperature rise inside DOC is analyzed through engine bench tests.The steady experiment results show that adjustment of the intake throttle valve can effectively increase exhaust temperature before DOC;in particular,with intake throttle valve opening at 20%,temperature before DOC can be increased by about 170℃ with respect to the full opening.An increase in the late post injection quantity can produce a significant rise of the temperature inside DOC,however its impact on the exhaust temperature before DOC is relatively limited.As the late post injection quantity increases,Hydrocarbon(HC)emissions also grow;in the present work it is shown that with a proper injection quantity,a considerable temperature increase inside the DOC can be obtained with relatively low HC emission.More specifically,with the intake throttle valve at 30%and DOC reaching ignition temperature as the late post injection quantity is increased,the exhaust temperature after DOC can be made larger than 550℃,adequate for DPF active regeneration.

关 键 词：Exhaust thermal management diesel engine DOC intake throttle late post injection 

分 类 号：TK4[动力工程及工程热物理—动力机械及工程]