Secondary air control in vehicle exhaust purification system

Details Secondary air control in vehicle exhaust purification system Secondary air control in vehicle exhaust purification system

1977-06-09

1980-01-15

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Methods

60278, 60290, 60306, F01N 310

Patent

active

041832124

ABSTRACT:
Control of secondary air flow to a reactor during normal operating condition of an engine is provided by relieving a predetermined portion of the secondary air discharged from an air pump to a point intermediate the reactor and a muffler installed downstream of the reactor. When the engine is operating under heavy load and/or at high speeds, all of the secondary air from the air pump is supplied to the reactor, while when the engine is operating at full load all of the secondary air from the air pump is relieved to the ambient atmosphere.

REFERENCES:
patent: 3812673 (1974-05-01), Muroki
patent: 3826089 (1974-07-01), Nakajima
patent: 3888080 (1975-06-01), Nohira
patent: 3921396 (1975-11-01), Nohira
patent: 3948045 (1976-04-01), Budinski
patent: 3962868 (1976-06-01), Matumoto

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