Invention Grant
- Patent Title: Failure diagnosis apparatus for exhaust pressure sensor
- Patent Title (中): 排气压力传感器故障诊断装置
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Application No.: US12566257Application Date: 2009-09-24
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Publication No.: US08190397B2Publication Date: 2012-05-29
- Inventor: Yoshiki Kurokawa
- Applicant: Yoshiki Kurokawa
- Applicant Address: JP Tokyo
- Assignee: Honda Motor Co., Ltd.
- Current Assignee: Honda Motor Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Arent Fox LLP
- Priority: JP2008-251977 20080930
- Main IPC: G06F11/30
- IPC: G06F11/30

Abstract:
A failure diagnosis apparatus for an exhaust pressure sensor for detecting the exhaust pressure in an exhaust gas recirculation passage which connects an exhaust passage and an intake passage of an internal combustion engine. A first preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined low load operating condition and a difference between the detected exhaust pressure and the atmospheric pressure is equal to or less than a first determination threshold value. A second preliminary determination that the exhaust pressure sensor is normal, is made when the engine is in a predetermined high load operating condition and the difference between the exhaust pressure detected by the exhaust pressure sensor and the atmospheric pressure is equal to or greater than a second determination threshold value. A final determination that the exhaust pressure sensor is normal, is made when both of the first and second preliminary determinations are made.
Public/Granted literature
- US20100082298A1 FAILURE DIAGNOSIS APPARATUS FOR EXHAUST PRESSURE SENSOR Public/Granted day:2010-04-01
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