Throttle valve for automotive transmission control system

Details Throttle valve for automotive transmission control system Throttle valve for automotive transmission control system

1974-07-25

1976-12-28

Scott, Samuel

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74869, B60K 4118

Patent

active

039994503

ABSTRACT:
A valve mechanism is comprised of first and second valves, the first valve producing a first fluid pressure in dependence on engine intake manifold vacuum while the second valve produces a second fluid pressure in response to the first pressure. A first valve spool is connected at its one end to a vacuum diaphragm responsive to the engine intake manifold vacuum. A valve spool land is exposed to the second pressurized fluid so that the spool is biased in one direction by the force developed by the second pressurized fluid acting on the valve land. A second valve spool is movable in response to the first fluid pressure to a position to reduce the pressure level of the second fluid when the engine intake manifold vacuum reaches a predetermined value.

REFERENCES:
patent: 3274848 (1966-09-01), Konrad et al.
patent: 3387508 (1968-06-01), Searles et al.
patent: 3453908 (1969-07-01), Iijima
patent: 3625322 (1971-12-01), Nagamatsu et al.
patent: 3685372 (1972-08-01), Miyazaki
patent: 3688606 (1972-09-01), Lemieux et al.
patent: 3714836 (1973-02-01), Pierce, Jr. et al.
patent: 3748931 (1973-07-01), Schaefer et al.
patent: 3768339 (1973-10-01), Kolehmainen et al.
patent: 3771388 (1973-11-01), Ishihara et al.

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