Numerical simulation of mixture formation and selection for two-stroke LPG direct injection engine for range-extended electric vehicle

doi:10.16731/j.cnki.1671-3133.2018.07.012

Modern Manufacturing Engineering ›› 2018, Vol. 454 ›› Issue (7): 65-73.doi: 10.16731/j.cnki.1671-3133.2018.07.012

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Numerical simulation of mixture formation and selection for two-stroke LPG direct injection engine for range-extended electric vehicle

Liu Yingchun¹, Jiang Longlong², Sun Chaodong³, Xu Boyan²

1 Weifang Institute of Technology,Weifang 262700,Shandong,China;
2 School of Mechanical and Electrical Engineering,Shandong Jianzhu University,Jinan 250101,China;
3 Liaocheng Vocational and Technical College,Liaocheng 252000,Shandong,China

Received:2017-04-12 Online:2018-07-20 Published:2018-07-20

Abstract

Abstract: Liquefied Petroleum Gas(LPG),as a fuel,is easy to evaporate and also is convenient to be stored and carried.In this study,LPG is selected as the fuel of a two-stroke direct injection engine which is used as the power source of a light electric vehicle.The mixture formation process of the engine is numerically calculated using a CFD software Fire V2011.The injection timings at different running conditions are optimized at the first,then the evolution of the velocity and concentration fields during the process of mixture formation under typical conditions are analyzed.The results show that the fuel can be locked in cylinder at the timings of intake port closing(73 ℃A ABDC)and finally homogenous theoretical mixture can be formed at spark timings for all the calculated cases,including both warming condition(2 000 r/min) and electricity generation conditions(4 800 and 6 000 r/min).

Key words: extended range electric vehicle, liquefied petroleum gas, two stroke direct injection engine, homogeneous mixture, numerical analysis

CLC Number:

TK464

Liu Yingchun, Jiang Longlong, Sun Chaodong, Xu Boyan. Numerical simulation of mixture formation and selection for two-stroke LPG direct injection engine for range-extended electric vehicle[J]. Modern Manufacturing Engineering, 2018, 454(7): 65-73.

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Numerical simulation of mixture formation and selection for two-stroke LPG direct injection engine for range-extended electric vehicle

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