Internal combustion engine control with fast exhaust catalyst wa

Details Internal combustion engine control with fast exhaust catalyst wa Internal combustion engine control with fast exhaust catalyst wa

1996-09-06

1998-12-08

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60285, F01N 320, F02D 4106

Patent

active

058454926

ABSTRACT:
In an engine exhaust catalyst warm-up control, ignition timing is delayed from normal first to raise the catalyst temperature, and then a fuel injection amount is dithered to increase and decrease alternately from a normal amount until the catalyst temperature reaches the catalyst activation completion temperature. In place of the ignition delay control, afterburning control may be employed in which fuel cut for a cylinder and fuel increase for the other cylinders are executed. Further, the catalyst warm-up control may be performed by controlling a supercharging operation and an exhaust gas recirculation operation cooperatively.

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