Title:
FAULT DIAGNOSIS DEVICE FOR EXHAUST GAS RECIRCULATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/002752
Kind Code:
A1
Abstract:
This fault diagnosis device for diagnosing the presence/absence of a fault in an EGR system comprises: an EGR temperature sensor that detects the temperature of EGR gas; an intake manifold pressure sensor that detects intake manifold pressure; and an EGR fault determination unit that determines the presence/absence of a fault in the EGR system. The EGR fault determination unit performs opening/closing operation control of an EGR valve during normal operation of an engine and performs fault determination of the EGR valve on the basis of a change in the intake manifold pressure. The EGR fault determination unit performs closing operation control of the EGR valve during warm-up operation after start-up of the engine and performs fault determination of the EGR valve on the basis of a change in temperature of the EGR gas.
Inventors:
TAKAHASHI KAZUMICHI (JP)
MATSUNAGA HIDEO (JP)
MATSUDA YOSHIKAZU (JP)
MATSUNAGA HIDEO (JP)
MATSUDA YOSHIKAZU (JP)
Application Number:
PCT/JP2022/021692
Publication Date:
January 26, 2023
Filing Date:
May 27, 2022
Export Citation:
Assignee:
MITSUBISHI MOTORS CORP (JP)
International Classes:
F02D29/06; B60K6/442; B60W10/06; B60W20/50; F02M26/47; F02M26/49
Foreign References:
| JP2014092066A | 2014-05-19 | |||
| JP2005291055A | 2005-10-20 | |||
| JP2016117314A | 2016-06-30 | |||
| JPH0835449A | 1996-02-06 | |||
| JPH03267561A | 1991-11-28 | |||
| JPS63192945A | 1988-08-10 | |||
| JPH0618653U | 1994-03-11 |
Attorney, Agent or Firm:
YAMAZAKI Tomoko (JP)
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