Time delay valve

Details Time delay valve Time delay valve

1980-01-22

1981-03-31

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123409, F02M 2304

Patent

active

042586887

ABSTRACT:
A time delay valve used in vacuum systems of internal combustion engines to significantly reduce exhaust emission pollutants. The valve includes a resilient valve disk with an orifice therethrough. An enlarged cavity is provided adjacent the valve disk into which either a spacer ring or spring may be inserted. In one mode, with the spacer ring inserted, the time delay valve regulates the change rate of both vacuum increase and vacuum decrease across the valve. In an alternative mode with the spacer ring replaced by a spring, the time delay valve regulates only the change rate of vacuum increase across the valve.

REFERENCES:
patent: 3326197 (1967-06-01), Elkins
patent: 3476094 (1969-11-01), Rucins et al.
patent: 3902469 (1975-09-01), Scott, Jr.
patent: 3913541 (1975-10-01), Scott, Jr.
patent: 3949711 (1976-04-01), Rittmansberger et al.
patent: 3978832 (1976-09-01), Walker et al.
patent: 4015568 (1977-04-01), Horiyc et al.
patent: 4083342 (1978-04-01), Bertling
patent: 4084565 (1978-04-01), Dorsch
patent: 4117814 (1978-10-01), Takahashi

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