桑梧海，刘永芳，苏益龙，司英杰

康跃科技股份有限公司，山东 寿光 262718

摘要：为了降低涡轮增压器滞后于发动机运转产生的尾音，设计一种用于改善乘用车增压器噪声的气流切换装置。该装置安装一个与油门传动连接的转换阀，控制旁通管、压气机出气管和发动机进气管管路连通状态。油门松开时，转换阀控制旁通管与压气机出气管和发动机进气管之间管路的交替启闭，降低涡轮增压器的尾音、缩短尾音时长。试验验证表明，设计的噪声改善装置可以降低涡轮增压器最高转速，而且降速平缓，能够有效降低尾音、改善噪声。

关键词：涡轮增压器；噪声；乘用车

Abstract: In order to solve the tail noise caused by the turbocharger lagging during the engine operation, this paper invented an airflow switching device for improving the noise of a passenger car turbocharger. The device includes a connection to the throttle and can control the bypass pipe. The switching valve that is opened and closed alternately with the pipeline between the compressor outlet pipe and the engine intake pipe. With the release of the throttle, the switching valve is driven to control the alternate opening of the pipeline between the bypass pipe and the compressor outlet pipe and the engine intake pipe. After experimental test verification, the maximum speed of the turbocharger can be reduced, and the speed reduction phase is relatively gentle, effectively reducing the tail sound and improving noise.

Keywords: turbocharger;noise;passenger car