Secondary air supply system for internal combustion engine

Details Secondary air supply system for internal combustion engine Secondary air supply system for internal combustion engine

1984-08-14

1986-11-11

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60293, 74860, F01N 322

Patent

active

046214933

ABSTRACT:
Admission of secondary air is effected to remove a portion of exhaust gases staying in components of a secondary air supply system, particularly, a one-way valve with a pair of lead valves. The scavenging with the secondary air is carried out when the fuel supply to the engine is suspended under a predetermined deceleration condition. When the predetermined deceleration condition is satisfied, a secondary air shut off valve is opened even when a coolant temperature of the engine is so high that the secondary air is not required by a catalyst in the exhaust system.

REFERENCES:
patent: 3971212 (1976-07-01), Morita
patent: 4075834 (1978-02-01), Saito
patent: 4098079 (1978-07-01), Ueda
patent: 4270347 (1981-06-01), Fukuba
patent: 4464896 (1984-08-01), Kubota
patent: 4476676 (1984-10-01), Ikenoya
patent: 4484441 (1984-11-01), Kobayashi

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