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Research on Heavy-Duty Diesel Vehicle of Stage Ⅳ Emission Control Technology

Author: LiangRongLiang
Tutor: GuoXueXun；LiMengLiang
School: Wuhan University of Technology
Course: Vehicle Engineering
Keywords: Heavy - duty diesel vehicles Emissions regulations Fuel quality Emission control Implementation experience
CLC: U467.48
Type: Master's thesis
Year: 2008
Downloads: 508
Quote: 6
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Abstract


Diesel engine with better fuel economy , power , durability and other advantages of the diesel car to the rapid development in recent years can be caused by diesel vehicle emissions , especially nitrogen oxides (NO_X) and solid particulate matter (PM ) more and more people's attention , and motor vehicles as a major mobile pollutants , the immeasurable contribution rate of urban air pollution , and to reduce the pollution levels of vehicle emissions on air quality , the formation of the United States , Europe, Japan , three global motor vehicle emissions regulatory system , according to their own national conditions of our country to develop vehicle emission regulations and standards provide the basis and reference . The diesel quality of diesel vehicle emissions , and diesel vehicle emissions control technologies are closely related . The papers -depth study of the impact on vehicle emissions characteristics of the main parameters of the sulfur content of the diesel cetane number and cetane index , aromatics , density and viscosity , distillation range , etc. , provides for the development of the National IV emission standards in line with China 's national conditions the science reasonable basis ; diesel engine has higher thermal efficiency , diesel technology continue to reduce the level of the PM and NO_X emissions , only constantly improved and refined purification technology in diesel engines machine in order to meet the escalating emissions regulations and continue to reduce the main problems facing the future emission limit requirements . Advanced diesel engine technology , including electronically controlled high pressure fuel injection technology , exhaust gas turbocharger and intercooler technology , efficient combustion technology , combustion chamber structural optimization and exhaust gas recirculation technology ; meet the country Ⅳ emission standards for heavy-duty diesel vehicles be retrofitted to exhaust after-treatment devices (SCR and EGR / DPF technology ) to reduce the PM and NO_X emissions factor . The article focuses on the technical continuity and the feasibility of the application of cost introduction to the comparative analysis of the SCR and EGR / DPF two different exhaust aftertreatment control technology using SCR technology , more and more heavy-duty diesel vehicles in the face of international focus on bench test and road test trials with SCR country ⅳ diesel engine emission characteristics , and SCR reductant usage statistics analysis , combined with the implementation of international heavy duty diesel vehicle emissions regulations experience of the country Ⅳ cars in China with urea reductant supply and infrastructure construction to provide a reference.

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CLC: > Transportation > Road transport > Automotive Engineering > Vehicle test > Parameters of the instruments and technology > Exhaust
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