Cooling water flow control system for internal combustion engine
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United States of America Patent
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May 27, 2003
Grant Date -
N/A
app pub date -
Jan 10, 2002
filing date -
Jul 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The object of the present invention is to promote warming-up operation in a cooling water flow control system of an internal combustion engine. A flow control valve is provided at a junction of a radiator passage and a bypass passage. Radiator flow rate and bypass flow rate of the flow control vale are controlled by detecting engine outlet water temperature, radiator outlet water temperature, number of revolutions of engine, and suction pipe negative pressure. The cooling water in the bypass passage passes through a throttle body, and flow rate is controlled to a totally closed flow rate or a micro-flow rate in the warming-up operation, and this contributes to the promotion of the warming-up operation.
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