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    • 5. 发明授权
    • Noise silencer for vehicle engine intake system
    • 汽车发动机进气系统噪声消音器
    • US6155224A
    • 2000-12-05
    • US332590
    • 1999-06-14
    • Hiroki AkihisaToshiaki NakayamaShuya Mikami
    • Hiroki AkihisaToshiaki NakayamaShuya Mikami
    • F01N1/00F02M35/10F02M35/12F02M35/14
    • F02M35/1266F02M35/14F02M35/10019
    • A noise silencer for reducing noise in an intake passage in an intake system has a parabolic portion for collecting noise, a noise accumulation room communicating with the intake passage through a communication passage and a noise discharge pipe communicating with an outside space. A noise collection valve is provided in the communication passage. When sound pressure in the intake passage is positive, i.e., larger than pressure inside the noise accumulation room, the noise collection valve opens the communication passage. As a result, a positive sound pressure portion of low-frequency noise is collected into the noise accumulation room and is discharged outside the intake system. Thus, the noise silencer effectively reduces low-frequency noise in the intake passage and requires less mounting space.
    • 用于减小进气系统中的进气通道中的噪声的噪声消声器具有用于收集噪声的抛物线部分,通过连通通道与进气通道连通的噪声积聚室以及与外部空间连通的噪声排放管。 噪声收集阀设置在连通通道中。 当进气通道中的声压为正时,即大于噪声聚集室内的压力时,噪声收集阀打开连通通道。 结果,将低频噪声的正声压部分收集到噪声累积室中,并将其排出到进气系统外部。 因此,噪声消声器有效地降低了进气通道中的低频噪声,并且需要较少的安装空间。