摘要
建立了华晨公司自主开发的某型1.6L发动机仿真模型并进行了标定,将该发动机模型与消声器数值模型进行耦合计算得到了该发动机排气系统的尾管噪声,并进行了该排气系统的优化改进。对优化后排气系统进行的实车测试及发动机台架试验结果表明,排气系统尾管噪声的A计权总声压级满足了目标要求;转速为1 200r/min时的2阶噪声和转速为1 400 r/min时的4阶噪声均得到了很大程度的改善。
A 1.6 L engine developed by Brilliance Auto Group is modeled and calibrated,with the coupling computation of this engine model and muffler numerical model,tailpipe noise of this engine exhaust system is obtained and optimization is made to the exhaust system.The vehicle test with the optimized exhaust system and engine bench test results indicate that total weighted sound pressure level of A meter of the tailpipe noise meets target requirement;the 2-order noise at speed of 1 200 r/min and 4-order noise at speed of 1 400 r/min are improved considerably.
出处
《汽车技术》
北大核心
2011年第4期34-37,共4页
Automobile Technology
关键词
发动机
排气系统
噪声
优化
Engine
Exhaust system
Noise
Optimization
