压气机性能变化对发动机瞬态性能的影响

黄强炜; 倪计民; 王琦玮

doi:10.3969/j.issn.1001-2222.2019.02.008

车用发动机 ›› 2019, Vol. 0 ›› Issue (2) : 50-55. DOI: 10.3969/j.issn.1001-2222.2019.02.008

栏目

压气机性能变化对发动机瞬态性能的影响

黄强炜，倪计民，王琦玮

作者信息 +

Effects of Compressor Performance Change on Engine Transient Performance

HUANG Qiangwei,NI Jimin,WANG Qiwei

Author information +

文章历史 +

摘要

基于某1.5 L涡轮增压汽油机，研究了压气机特性参数对发动机低速低负荷瞬态性能的影响。在GTPower中建立稳态仿真模型并验证，进而构建瞬态仿真模型。采用定转速增转矩的方式进行发动机瞬态性能研究，并建立三种瞬态响应指标用于分析。通过改变压气机特性参数中高效率区在高低压比、大小流量范围内的分布并分析瞬态性能评价指标，可知高效率区处在高压比范围时瞬态性能得到优化；当在该范围内改变比例为20%时，瞬态响应变快68%。研究结果表明，压气机高效率区在高低压比、大小流量范围内的不同分布有助于改善发动机瞬态性能。

Abstract

Based on a 1.5 L turbocharged gasoline engine, the effects of compressor characteristic parameters on engine transient performance at low speed and low load was studied. A steadystate simulation model was established and verified in GTPower and then a transient simulation model was constructed. The engine transient performance was studied using a constant speed and increase of torque method and three transient response indicators were established for analysis. By changing the distribution of compressor highefficiency zone in the highlow pressure ratio range and largesmall flow range and analyzing the transient performance evaluation index, the transient performance was optimized when the highefficiency zone lied in the highpressure ratio range. The transient response accelerated by 68% when the ratio changed as 20% within this range. The results show that different distributions of compressor highefficiency zone in the highlow pressure ratio range and largesmall flow range can improve the transient performance of engine.

导出引用

黄强炜，倪计民，王琦玮. 压气机性能变化对发动机瞬态性能的影响[J]. 车用发动机. 2019, 0(2): 50-55 https://doi.org/10.3969/j.issn.1001-2222.2019.02.008

HUANG Qiangwei,NI Jimin,WANG Qiwei. Effects of Compressor Performance Change on Engine Transient Performance[J]. Vehicle Engine. 2019, 0(2): 50-55 https://doi.org/10.3969/j.issn.1001-2222.2019.02.008