某SUV车型排气低频噪声的优化

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摘 要：本文针对我司某SUV的排气低频噪声声品质问题进行改善提升，通过对消声器内部结构进行优化设计，在共振消声器内部采用排气阀改善排气低频噪声。并通过理论分析和实车测试，对改进前后的排气低频噪声及整车排气背压进行了分析，成功解决了排气低频噪声问题。

关键词：排气低频噪声 共振消声器 排气阀 排气背压

Optimization of Exhaust Low Frequency Noise of an SUV Model

Cheng Zhimou

Abstract：This article aims to improve the quality of the exhaust low-frequency noise of an SUV in a company. By optimizing the internal structure of the muffler， an exhaust valve is used in the resonance muffler to improve the low-frequency noise of the exhaust. And through theoretical analysis and actual vehicle test， the exhaust low-frequency noise before and after the improvement and the exhaust back pressure of the whole vehicle were analyzed， and the problem of exhaust low-frequency noise was successfully solved.

Key words：exhaust low-frequency noise， resonance muffler， exhaust valve， exhaust back pressure

1 引言

本文研究的课题来源于东风柳汽某SUV车型，在ET-lot阶段进行NVH性能测试时存在2阶和4阶低频排气噪声问题，将会影响客户的驾驶感受。（剩余2688字）

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