Monitoring system for internal combustion engine

Details Monitoring system for internal combustion engine Monitoring system for internal combustion engine

2005-05-11

2008-09-02

Kwon, John T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S568210

Reexamination Certificate

active

07421333

ABSTRACT:
A technique is provided which can specify a member in which malfunction really occurs when there exists malfunction in at least one of a plurality of state values representing the state of an internal combustion engine. When an amount of fresh intake air is controlled by increasing and decreasing an amount of EGR gas in a feedback manner, and when an amount of fuel to be added to an exhaust gas is controlled based on an air fuel ratio sensor in a feedback manner, a determination is made, based on the result of comparison between output values and command values of members to be detected and corresponding reference values, as to in which member malfunction occurs. Such a determination is based on the fact that relations between output values and command values of the members to be detected and corresponding reference values in individual operating states are different from one another depending on sensors or devices in which malfunction occurs.

REFERENCES:
patent: 6739177 (2004-05-01), Sato et al.
patent: 7111455 (2006-09-01), Okugawa et al.
patent: 2004/0158387 (2004-08-01), Yasui et al.
patent: 2004/0177605 (2004-09-01), Kojima et al.
patent: A 59-158342 (1984-09-01), None
patent: A 4-8845 (1992-01-01), None
patent: A 10-159640 (1998-06-01), None
patent: A 2002-21622 (2002-01-01), None
patent: A 2003-120399 (2003-04-01), None

Affiliated with

Also associated with

Rating

Monitoring system for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monitoring system for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monitoring system for internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3987645