Meet The Jing-V Emissions Diesel Engine Exhaust Gas Appliance System Performance Research

The Diesel engine has accelerated the trend of future vehicles’ dieselization with its energy saving, high efficiency, environmental protection and other advantages. The design and manufacturing of the modern diesel engine are facing double subjects: economy and environmental protection. The control of exhaust pollutants of diesel engine emissions level is one of the key technologies in the study to improve within the industry. Therefore,what kind of post processing technology in the diesel engine, and the key points of the technology to conduct in-depth research are of great significance.Based on state-owned enterprises’ current six-cylinder diesel engine emission after-treatment system as the research object, this thesis has collected large bibliographies and done deeply research in the production site. Through the in-depth analysis of the formation mechanism of the various emission pollutants in exhausts emissions from a diesel engine, we planned to meet the requirements of Beijing V emission standard made by the local government in Beijing Through the optimization of the engine body and the selection of the appropriate post-processing technology.First, we compared the merits of different packages with the selection of the post processor, each catalyst carrier specifications, carrier size and determined the final design of the processor according to the way of testing. ESC duty cycle,NO_x<1.5g/k Wh,PM<3.5mg/k Wh;ETC duty cycle,NO_x<1.68g/k Wh,PM<3.4mg/k Wh;WHTC duty cycle,NO_x<2.4g/k Wh,PM<3.2mg/k Wh,PN<2.75×1011;Then, based on the study of the carbon load and the temperature characteristics of the equilibrium point, the prediction model of Simul ink carbon load was established while the carbon load test and the test of the balance point temperature were carried out. according to the way of testing, The error of carbon load is less than 10%,at the Balance point temperature of 250 ℃, th drop pressure stability in 70 hbar.Finally, we experimented on the carbon load and the balance point temperature, and gave a comprehensive comparison for the exhaust temperature, NO_x generation, smoke and so on, through the experimental verification, we selected the ti me, regeneration efficiency, safety and other indicators that were in the required conditions.we choose 1700 rpm as the Parked Regeneration working condition.