Invention Grant
- Patent Title: Device and method for active noise cancellation in exhaust gas channel of a combustion engine
- Patent Title (中): 内燃机废气通道主动消噪装置及方法
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Application No.: US12313209Application Date: 2008-11-17
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Publication No.: US07753165B2Publication Date: 2010-07-13
- Inventor: Uwe Kassner
- Applicant: Uwe Kassner
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Kenyon & Kenyon LLP
- Main IPC: F01N1/06
- IPC: F01N1/06 ; F02M35/10 ; G01L23/22 ; G06F11/30 ; G10K11/16
Abstract:
In a method and a device for canceling the noise in an exhaust gas channel of a vehicle, a noise signal is received from the exhaust gas channel using a sound sensor, and a frequency signal which has the same amplitude and the opposite phase as the noise signal is generated. The generated frequency signal is acoustically mixed with the noise signal in the exhaust gas channel using a sound converter, there by reducing the noise in the exhaust gas channel. In addition, the temperature in the exhaust gas channel is calculated based on the received sound signal.
Public/Granted literature
- US20090173568A1 Device and method for active noise cancellation in exhaust gas channel of a combustion engine Public/Granted day:2009-07-09
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