US 11,680,510 B1
Cooling device for internal combustion engine and cooling method of internal combustion engine
Noboru Takagi, Toyota (JP); Shoichi Akiyama, Toyota (JP); Hirokazu Tanaka, Kariya (JP); Masazumi Yoshida, Kariya (JP); Ryusuke Sasaki, Kariya (JP); Masahiro Kuroki, Kariya (JP); and Koki Fukuta, Kariya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and AISIN CORPORATION, Kariya (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP); and AISIN CORPORATION, Kariya (JP)
Filed on Dec. 2, 2022, as Appl. No. 18/61,006.
Claims priority of application No. JP2021-214435 (JP), filed on Dec. 28, 2021.
Int. Cl. F01P 5/10 (2006.01); F01P 7/16 (2006.01); F01P 3/18 (2006.01)
CPC F01P 5/10 (2013.01) [F01P 3/18 (2013.01); F01P 7/162 (2013.01); F01P 7/164 (2013.01); F01P 7/165 (2013.01); F01P 2005/105 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A cooling device for an internal combustion engine, the cooling device comprising:
a first passage that is connected to the internal combustion engine and that is configured to circulate a coolant;
a second passage that is connected to the internal combustion engine and that is configured to circulate the coolant;
a heat exchanger that is provided on the first passage and that is configured such that heat exchange is performed with respect to the coolant;
a first pump provided on the first passage;
a second pump provided on the second passage; and
an electronic control unit configured to control the first pump and the second pump, wherein
the electronic control unit is configured to, when a temperature of the coolant is no lower than a predetermined temperature, drive the first pump such that a flow rate of the coolant in the first passage increases as compared when the temperature of the coolant is lower than the predetermined temperature, and perform first control of stopping the second pump.