Research on Performance Improvements of Extended-range Engines Based on DOE Technology

Abstract

Abstract: Taking a 1.5L extended-range engine as the research object， the computer aided engineering（CAE） simulation model was established and calibrated， and the valve lift curves， intake manifolds and intake port structures were optimized using the DOE technology， and a comprehensive bench experimental calibration was carried out for the remodeled extended-range engines. The experimental and analytical results show that the new valve lift curves improve the low speed torques， especially when the rotation speed is as 1200r/min and 2800r/min， the torques are increased as 10% and 12% respectively. The intake port structures are optimized， and the average rolling ratio is greatly increased， which is about 1.5~2.2 times more than that of the original ones. The experimental fuel consumption value of the high efficiency zone for the optimized extended-range engines is as 250g/（kW·h）， which is nearly 3 times more than that of the original ones.

Key words: design of experiment（DOE）, extended-range, performance improvement, bench test

摘要： 以某1.5 L增程式发动机为研究对象，建立并标定其CAE仿真模型，利用实验设计（DOE）技术对气门升程曲线、进气歧管及进气道结构进行优化研究；对改型后的增程式发动机进行了全面的台架试验标定。实验和分析结果表明：新的气门升程曲线提高了低速段扭矩，尤其是转速为1200r/min和2800r/min时，扭矩分别增大了10%和12%；优化了进气道结构，平均滚流比大幅提升至原来的1.5~2.2倍；优化后的增程式发动机高效率区的实验等油耗值为250g/（kW·h），相对原机的实验等油耗值，增加了近3倍。

关键词: 实验设计, 增程式, 性能提升, 台架试验

CLC Number:

TK4.5

CHENG Xueli1;DING Shuyong2;AN Linchao1. Research on Performance Improvements of Extended-range Engines Based on DOE Technology[J]. China Mechanical Engineering.

程雪利1;丁树勇2;安林超1. 基于实验设计技术的增程式发动机性能提升研究[J]. 中国机械工程.

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