System for diagnosing fuel supply system of internal combustion

Details System for diagnosing fuel supply system of internal combustion System for diagnosing fuel supply system of internal combustion

1998-07-08

1999-09-14

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123674, 123690, 123479, F02D 4114

Patent

active

059506067

ABSTRACT:
In an engine fuel supply system, the difference between the actual and target air-fuel ratios, an air-fuel ratio feedback correction coefficient and a learned correction amount are added as a parameter for diagnosing the fuel supply system. The diagnostic parameter is smoothed and the smoothed value is compared with a diagnosis reference value, thereby detecting a malfunction in the fuel supply system. Even if the learned correction amount is not updated, the malfunction in the fuel supply system can be promptly detected from the difference between the actual and target air-fuel ratios and the air-fuel ratio correction coefficient. The diagnosis reference value is determined variably in accordance with engine operating parameters such as the amount of intake air.

REFERENCES:
patent: 5048490 (1991-09-01), Nakaniwa
patent: 5094214 (1992-03-01), Kotzan
patent: 5634454 (1997-06-01), Fujita
patent: 5694912 (1997-12-01), Gotou et al.
patent: 5752492 (1998-05-01), Kato et al.

Affiliated with

Also associated with

Rating

System for diagnosing fuel supply system of internal combustion does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1499070