Method and system for controlling the amount of secondary air in

Details Method and system for controlling the amount of secondary air in Method and system for controlling the amount of secondary air in

1995-04-05

1998-10-20

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60285, 60289, 60290, F01N 320

Patent

active

058229760

ABSTRACT:
A method and system for controlling the amount of secondary air introduced into a vehicle's exhaust gases in order to maintain a desired catalyst air/fuel ratio for a predetermined engine air/fuel ratio. First, a quantity of primary air flow necessary to maintain the predetermined engine air/fuel ratio is determined. Next, a quantity of secondary air flow necessary to maintain the desired catalyst air/fuel ratio is determined. Finally, a controller controls the amount of secondary air introduced into the vehicle's exhaust gases based on the determined quantity of secondary air flow.

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