Engine air/fuel control responsive to catalyst window locator

Details Engine air/fuel control responsive to catalyst window locator Engine air/fuel control responsive to catalyst window locator

1995-03-06

1996-07-23

Heyman, Leonard E.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60285, F02D 4114

Patent

active

055378161

ABSTRACT:
An engine air/fuel controller (12) is responsive to a two-state exhaust gas oxygen sensor (16) positioned upstream of a three-way catalytic converter (20) and a proportional exhaust gas oxygen sensor (24) positioned downstream of the catalytic converter. A base fuel signal is trimmed by a feedback variable derived by integrating (402-428) the upstream (16) sensor output. The feedback variable is biased towards leaner air/fuel ratios when a distribution of the downstream sensor output amplitudes has a peak value indicating a rich air/fuel ratio. And the feedback variable is biased towards richer air/fuel ratios when the downstream sensor output distribution has a peak value indicating a lean air/fuel ratio (320-396).

REFERENCES:
patent: 4953351 (1990-09-01), Motz et al.
patent: 5115639 (1992-05-01), Gopp
patent: 5438827 (1995-08-01), Ohuchi et al.

Affiliated with

Also associated with

Rating

Engine air/fuel control responsive to catalyst window locator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Engine air/fuel control responsive to catalyst window locator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Engine air/fuel control responsive to catalyst window locator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-705475