Engine fuel cut controller

Details Engine fuel cut controller Engine fuel cut controller

1996-06-10

1998-10-06

Mitchell, David M.

Motor vehicles

With means for detecting wheel slip during vehicle...

701 86, B60K 2816

Patent

active

058163530

ABSTRACT:
In a fuel cut controller wherein fuel supply is stopped to some cylinders when there is a fuel cut request, an ordinary fuel cut mode and a multi-cylinder fuel cut mode are set. When the ordinary fuel cut mode has continued for a predetermined time, fuel cut is performed in an equal or larger number of cylinders in the multi-cylinder fuel cut mode, and the engine output torque therefore decreases further. At the same time, due to the increase in cylinders where fuel supply is stopped, the amount of fresh air flowing from these cylinders to a catalytic converter increases, and the amount of unburned fuel flowing into the converter from the cylinders where fuel supply is performed decreases. As a result, heat due to reaction of unburned fuel in the converter decreases, and the increasing amount of fresh air cools the converter, so temperature rise of the converter is suppressed.

REFERENCES:
patent: 5473544 (1995-12-01), Yamashita
patent: 5559703 (1996-09-01), Iwata et al.
patent: 5609218 (1997-03-01), Yamashita et al.

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