Invention Grant
- Patent Title: Distinguishing between EGR valve and oxygen sensor degradation
- Patent Title (中): 区分EGR阀和氧传感器的劣化
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Application No.: US13089026Application Date: 2011-04-18
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Publication No.: US08775011B2Publication Date: 2014-07-08
- Inventor: Imad Hassan Makki , James Michael Kerns , Timothy Joseph Clark , Robert Roy Jentz , Michael James Uhrich
- Applicant: Imad Hassan Makki , James Michael Kerns , Timothy Joseph Clark , Robert Roy Jentz , Michael James Uhrich
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Julia Voutyras
- Main IPC: G01M17/00
- IPC: G01M17/00 ; B60T8/88 ; B60T13/52 ; B60T17/02
Abstract:
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.
Public/Granted literature
- US20120265396A1 Distinguishing Between EGR Valve and Oxygen Sensor Degradation Public/Granted day:2012-10-18
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