Cold start engine air/fuel control system

Details Cold start engine air/fuel control system Cold start engine air/fuel control system

1994-12-06

1995-11-14

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123674, 123685, 123694, F02P 515, F02D 4114

Patent

active

054656974

ABSTRACT:
An air/fuel control system (8) generates a fuel command (100) for fuel delivery to the engine (28) based upon at least an amount of air inducted into the engine. This fuel command is trimmed by a feedback variable derived (240-282) from an exhaust gas oxygen sensor (44) when feedback control is initiated. Feedback control is commenced when the peak-to-peak output of the sensor is less than a threshold value (122-128) while pumping current applied to a sensor electrode is modulated (122-128). Modulation is then removed but the pumping current is maintained to shift the sensor output to a preselected lean air/fuel ratio (128). Lean air/fuel feedback control continues until the converter is warmed (130-140).

REFERENCES:
patent: 4109615 (1978-08-01), Asano
patent: 4120269 (1978-10-01), Fujishiro
patent: 4132200 (1979-01-01), Asano et al.
patent: 4144853 (1979-03-01), Maruoka et al.
patent: 4170965 (1979-10-01), Aono
patent: 4187806 (1980-02-01), Schurle et al.
patent: 4376026 (1983-03-01), Hoffman et al.
patent: 4626338 (1986-12-01), Kondo et al.
patent: 4936276 (1990-06-01), Gopp
patent: 5203300 (1993-04-01), Orzel
patent: 5211011 (1993-05-01), Nishikawa et al.
patent: 5228421 (1993-07-01), Orzel
patent: 5245979 (1993-09-01), Pursifull et al.
patent: 5253631 (1993-10-01), Curran

Affiliated with

Also associated with

Rating

Cold start engine air/fuel control system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cold start engine air/fuel control system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cold start engine air/fuel control system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1214548