发明名称 |
System for suppressing noise due to exhaust gas from motor vehicle |
摘要 |
In an automotive vehicle installed with a V-6 engine, engine revolution speed and engine load are detected and a selector valve provided in a silencer is normally closed but it is opened when the engine revolution speed exceeds a predetermined engine revolution speed value when the 3rd order component of exhaust sound coincides with a longitudinal resonance frequency within a vehicle cabin when the vehicle is at acceleration. The selector valve which is normally closed is opened when the engine revolution speed exceeds a second predetermined engine revolution speed value when the 1.5th order component of the exhaust sound coincides with the longitudinal resonance frequency.
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申请公布号 |
US4901528(A) |
申请公布日期 |
1990.02.20 |
申请号 |
US19890297649 |
申请日期 |
1989.01.17 |
申请人 |
NISSAN MOTOR CO., LTD. |
发明人 |
SAIGO, FUMITAKA;AZUMA, AKIRA;NAKAGAWA, RYOICHI |
分类号 |
F01N13/08;F01N1/08;F01N1/16;F02B27/06;F02B75/02 |
主分类号 |
F01N13/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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