Flow control valve

Details Flow control valve Flow control valve

2005-01-04

2005-01-04

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Cooling

Automatic coolant flow control

C123S041020

Reexamination Certificate

active

06837193

ABSTRACT:
A flow control valve used in a cooling system of a water cooling type includes a first valve body and a first valve seat for controlling a quantity of radiator flow which returns from an engine to a pump through a radiator, a second valve body and a second valve seat for controlling a quantity of bypass flow which returns from the engine to the pump without passing through the radiator, and a step motor for displacing the valve bodies integrally as a valve unit. The first valve body, the first valve seat, the second valve body, and the second valve seat are so arranged that, in a range where the radiator flow quantity becomes practically zero, the bypass flow is permitted to flow at a slightly larger quantity than the radiator flow and, in other ranges, the bypass flow quantity is equal to or lower than the radiator flow quantity.

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patent: A 9-195768 (1997-07-01), None
patent: A 2000-18039 (2000-01-01), None

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