Intake secondary air supply system for internal combustion engin

Details Intake secondary air supply system for internal combustion engin Intake secondary air supply system for internal combustion engin

1983-12-06

1985-11-19

Cuchlinski, Jr., William A.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123589, F02M 2304

Patent

active

045535213

ABSTRACT:
An intake secondary air supply system for adding air to the intake of an internal combustion engine under certain sensed conditions, such as an excessively rich air-fuel ratio detected by an oxygen sensor in the exhaust system, wherein two separate secondary air supply passages are provided and separately controlled by vacuum responsive valves. One of such valves is controlled to open and close over a period of time to provide a changing supply of secondary air while the other valve is connected through a solenoid operated valve to the engine intake to provide an immmediate opening or closing of that secondary air supply. Vacuum controls responsive to engine operating condition serve to operate the vacuum responsive valves although in one embodiment one of such valves is operated by a constant regulated vacuum.

REFERENCES:
patent: 4083341 (1978-04-01), Brettschneider et al.
patent: 4091783 (1978-05-01), Laprade et al.
patent: 4192140 (1980-03-01), Yamashita et al.
patent: 4335699 (1982-06-01), Totsune et al.
patent: 4436070 (1984-03-01), Akagi et al.
patent: 4449502 (1984-05-01), Foruhashi

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