Cooling water control valve and cooling water circuit system emp

Details Cooling water control valve and cooling water circuit system emp Cooling water control valve and cooling water circuit system emp

1997-08-26

1998-09-22

Okonsky, David A.

Internal-combustion engines

Cooling

Automatic coolant flow control

123 4109, F01P 700

Patent

active

058099441

ABSTRACT:
According to the present invention, in a cooling water control valve disposed in a cooling water circuit of a water-cooled engine, switching of the cooling water flowing into and out of a heat-accumulating tank and control of an amount of the cooling water passing through a bypass water passage are performed by a single control valve element. Further, a bypass water passage is opened according to a decrease of an absolute of intake negative pressure detected by a pressure sensor and is closed according to the increase of the absolute of the intake negative pressure.

REFERENCES:
patent: 3921600 (1975-11-01), Henning et al.
patent: 4509481 (1985-04-01), Nagumo et al.
patent: 4545333 (1985-10-01), Nagumo et al.
patent: 4930455 (1990-06-01), Creed et al.
patent: 4977743 (1990-12-01), Aihara et al.
patent: 5404842 (1995-04-01), Matsushiro et al.
patent: 5642691 (1997-07-01), Schroeder

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