COOLING DEVICE FOR VEHICLE

WIPO Patent Application WO/2011/089705

A1

A thermostat (7) that prohibits and allows the passage of coolant in a first coolant circuit through the inside of an engine (1) includes a valve body urged by a spring in a direction along which the valve body is closed and a thermoelement that opens the valve body against the urging force of the spring. The thermoelement pushes out or draws a shaft using thermal expansion or thermal shrinkage of wax enclosed inside thereof. Moreover, the thermostat (7) is provided with an element heater that heats the thermoelement. When the temperature of the thermoelement is low and the valve body of the thermostat (7) is closed, the thermoelement is heated by the element heater such that the temperature of the thermoelement rises while the valve body is kept closed. With this, when the thermoelement is heated by the element heater such that the valve body of the thermostat (7) is opened on the basis of a request to open the valve body, the temperature of the thermoelement rises to a value at which the valve body can be quickly opened.

SHINTANI OSAMU (JP)
KINOMURA SHIGEKI (JP)
FURUKOSHI TARO (JP)
KOMADA ATSUSHI (JP)

PCT/JP2010/050771

July 28, 2011

January 22, 2010

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TOYOTA MOTOR CO LTD (JP)
SHINTANI OSAMU (JP)
KINOMURA SHIGEKI (JP)
FURUKOSHI TARO (JP)
KOMADA ATSUSHI (JP)

F01P7/16

JP2004137981A	2004-05-13
JPH11287123A	1999-10-19
JP2005188327A	2005-07-14
JPS5618018A	1981-02-20
JP2008231942A	2008-10-02

ONDA, Hironori et al. (JP)
Hironori Onda (JP)

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