Internal combustion engine with device for warning of malfunctio

Details Internal combustion engine with device for warning of malfunctio Internal combustion engine with device for warning of malfunctio

1989-03-28

1990-08-14

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123198D, 123489, F02D 4122, F02D 4114

Patent

active

049478184

ABSTRACT:
A warning system for an air-fuel ratio control system for a electronic controlled internal combustion engine, where a basic fuel injection amount is corrected by a feedback correction factor determined by a signal from an air-fuel ratio sensor arranged in an exhaust pipe. An amplitude of the feedback correction factor caused by an acceleration of the engine, where the exhaust from cylinders is not completely mixed, is detected, and a warning can be given when the amplitude of the feedback correction factor is larger than a predetermined value. A malfunction in the air-fuel ratio system occurring in one cylinder can be detected. In a double O.sub.2 sensor system, where a sub-feedback loop is provided for correcting the feedback correction factor in accordance with a signal from the second O.sub.2 sensor, the sub-feedback is stopped when the amplitude of the feedback correction factor is larger than a predetermined value, and a quick and precise detection of a malfunction is obtained by stopping the sub-feedback operation.

REFERENCES:
patent: 4182300 (1980-01-01), Ono et al.
patent: 4483300 (1984-11-01), Hosaka et al.
patent: 4638658 (1987-01-01), Otobe
patent: 4739614 (1988-04-01), Katsuno et al.
Collection of Toyota Technology V. 1667, Jan. 29, 87.

Affiliated with

Also associated with

Rating

Internal combustion engine with device for warning of malfunctio does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-454705