Influence of Valve Overlap Angle on GDI Engine Performance and Particulate Emission

被引：0
|
作者：
Li X. [1 ]
Xie F. [1 ]
Dou H. [2 ]
Liu J. [2 ]
Liu Y. [1 ]
机构：
[1] Jilin University, State Key Laboratory of Automobile Simulation and Control, Changchun
[2] China FAW Co. ，Ltd. R&D Center, Changchun
来源：
Qiche Gongcheng/Automotive Engineering | 2023年 / 45卷 / 04期
关键词：
direct injection gasoline engine; engine performance; particulate emission; valve overlap angle; valve timing;
D O I：
10.19562/j.chinasae.qcgc.2023.04.014
中图分类号：
学科分类号：
摘要：
In this paper，the influence of valve overlap angle formed by variable intake timing（IVT），variable exhaust timing（EVT）and variable intake and exhaust timing strategy（IEVT）on combustion and particulate emission of the direct injection gasoline engine is studied. It is found that the increase of positive valve overlap angle under the three timing strategies under low load will lead to the increase of residual exhaust gas in the cylinder，prolonged ignition delay and increased combustion duration ，and reduce fuel consumption and HC emissions at first and then increase，and reduce NOx emission. At the same valve overlap angle，EVT has the largest amount of residual exhaust gas，while IVT can improve the pumping loss by 15.6%. Compared with IVT and EVT，IEVT still burns stably at the overlapping angle of 60 ° CA and reduces heat transfer loss and exhaust loss，with reduction offuel consumption by 8.67%，reduction of NOx by 96.57%，and reduction of the total number of particles by 89.43%. © 2023 SAE-China. All rights reserved.
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页码：654 / 662
页数：8
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