Inlet,Exhaust And Turbo Charging System Design, Experiment And Computational Analysis For H Series Diesel Engines With CRS

In recent years, to improve diesel engine volumetric efficiency and reduce emissions, a lot of research work was done around the inlet , exhaust and boost system. The objective of this paper is to study inlet , exhaust and turbo charging system of H series diesel engines with CRS by analytical, experimental and computational methods according to the actual requirement of production development. We try to integrate inlet, exhaust system, turbocharger, inter cooler and engine cylinder into a whole to calculate with AVL one-dimensional BOOST software. This paper described the effect of inlet parameter such as volumetric efficiency, A/F ratio, boost pressure and fuel consumption associated with the change of pressure wave, geometry profile in the inlet system. This paper also illustrate the effect of performance parameter such as B.S.F.C., exhaust temperature, boost pressure and power associated with the change of pressure wave, geometry profile in the exhaust system. The feature of three-dimensional flow field was analyzed with AVL FIRE software in order to reduce the losses of flow, improve volumetric efficiency and transfer efficiency of exhaust energy. We got a good consistency between steady flow test results and calculation results. Multi project of inlet and exhaust system was analyzed with numerical simulation and test methods. The optimize project was confirmed on these works. Engine working process simulation method was applied to study if the variation of the volumetric efficiency according to engine speed meets the requirement of rated power and peak torque. The valve-timing and turbo charging system were optimized through the simulation. Finally, the engine performance test results on the engine test bench show that the inlet , exhaust and turbo charging system can meet the engine performance requirement.