发明授权
- 专利标题： Exhaust arrangement for a gasoline
- 专利标题（中）： 汽油排气装置
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申请号： US448985申请日： 1995-05-24
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公开(公告)号： US5582005A公开(公告)日： 1996-12-10
- 发明人: Klaus Wunderlich , Stefan Pischinger , Bernd Krutzsch , Martin Bechtold
- 申请人： Klaus Wunderlich , Stefan Pischinger , Bernd Krutzsch , Martin Bechtold
- 申请人地址： DEX
- 专利权人： Daimler-Benz AG
- 当前专利权人： Daimler-Benz AG
- 当前专利权人地址： DEX
- 优先权： DEX4418117.5 19950524
- 主分类号： F01N3/08
- IPC分类号： F01N3/08 ; F01N3/20 ; F01N13/02 ; F02D41/14 ; F01N3/16
摘要：
The invention relates to a gasoline engine having a catalyst for reducing the emission pollutants, with an oxygen absorption device located in the exhaust line upstream of the catalyst. According to the invention, the gasoline engine is operated in a first operating range with a lean air/fuel ratio (.lambda.), and oxygen is removed from the exhaust by the absorption device. In a second operating range, the gasoline engine is operated at .lambda.=1, and the absorption device is bypassed or deactivated. In the case of a gasoline engine with a Denox catalyst the gasoline engine is operated constantly with a lean air/fuel ratio, with the active surface of the Denox catalyst being "depoisoned" temporarily by activating the oxygen absorption device.