COOLING DEVICE FOR INTERNAL COMBUSTION ENGINE, AND COOLING METHOD FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2015/001855

A1

The present invention is provided with: a three-way valve (12) which is provided to an outlet side of a cooling passage (L1), and which splits the cooling passage (L1) into a bypass passage (L2) and a heat exchange passage (L3) having, disposed therein, a heat exchanger (14) for cooling a coolant; a first temperature detection unit (21) for detecting an inlet temperature of the coolant supplied to the heat exchanger (14); a second temperature detection unit (22) for detecting an outlet temperature; and a control unit (23) for controlling the distribution of the flow rate of the coolant outputted by the three-way valve (12). The control unit (23) has, stored therein, a correspondence relationship between a thermal strain amount generated in the heat exchanger (14) and the temperature difference (∆T) between the inlet temperature and the outlet temperature of the heat exchanger (14). Furthermore, when supplying the coolant to the heat exchange passage (L3), the control unit (23) refers to the temperature difference (∆T) and the correspondence relationship to obtain a flow rate for the coolant to be supplied to the heat exchange passage (L3), said flow rate being such that the thermal strain amount does not exceed a preset threshold-value thermal strain amount.

ICHIHARA TAKAYOSHI (JP)
KAWAMOTO AIKO (JP)
OKO YOSHIMI (JP)

PCT/JP2014/063184

January 08, 2015

May 19, 2014

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NISSAN MOTOR (JP)

F01P7/16; B60K11/02

JP2008037302A	2008-02-21
JP2008239014A	2008-10-09
JP2007100767A	2007-04-19
JP2010242525A	2010-10-28
JP2008037302A	2008-02-21

See also references of EP 3018317A4

MIYOSHI, Hidekazu et al. (JP)
Hidekazu Miyoshi (JP)

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