发明授权
- 专利标题： Distinguishing between EGR valve and oxygen sensor degradation
- 专利标题（中）： 区分EGR阀和氧传感器的劣化
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申请号： US13089026申请日： 2011-04-18
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公开(公告)号： US08775011B2公开(公告)日： 2014-07-08
- 发明人: Imad Hassan Makki , James Michael Kerns , Timothy Joseph Clark , Robert Roy Jentz , Michael James Uhrich
- 申请人： Imad Hassan Makki , James Michael Kerns , Timothy Joseph Clark , Robert Roy Jentz , Michael James Uhrich
- 申请人地址： US MI Dearborn
- 专利权人： Ford Global Technologies, LLC
- 当前专利权人： Ford Global Technologies, LLC
- 当前专利权人地址： US MI Dearborn
- 代理机构： Alleman Hall McCoy Russell & Tuttle LLP
- 代理商 Julia Voutyras
- 主分类号： G01M17/00
- IPC分类号： G01M17/00 ; B60T8/88 ; B60T13/52 ; B60T17/02
摘要：
A diagnostic method for an engine having a valve for controlling dilution of intake air. The method comprises, during engine fueling, indicating a degradation of the valve when the valve is commanded closed but sensor output corresponds to an oxygen level below that of air. The method further comprises, absent engine fueling, indicating degradation of the sensor when the valve is commanded closed but the sensor output corresponds to an oxygen level below that of air.
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