Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Aisin Corporation

Ryusuke Sasaki

Noboru Takagi

Masazumi Yoshida

Hirotaka Watanabe

Kenichi Komuro

Shoichi Akiyama

Yasunobu Toyoda

Hirokazu Tanaka

Koki Fukuta

Masahiro Kuroki

A cooling device for an internal combustion engine is provided. The cooling device includes a first passage connected to the internal combustion engine and circulating a coolant, a second passage connected to the internal combustion engine and circulating the coolant, a heat exchanger provided on the first passage and 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 controlling the first pump and the second pump. The electronic control unit, when a temperature of the coolant is no lower than a predetermined temperature, drives the first pump such that a flow rate of the coolant in the first passage increases as compared to when the temperature of the coolant is lower than the predetermined temperature, and performs first control of stopping the second pump.

Cooling device for internal combustion engine and cooling method of internal combustion engine

A device seating a valve body with the aid of an urging force of a spring by stopping the operation of a pump, changes over an energization state of a coil of at least one of the liquid shutoff valves which is changed over to the closed-valve state where the coil is energized, and then resumes the operation of the pump. Upon detecting the start of operation of the pump, a valve control unit causes a pump control unit to perform opening-closing force-feed control, where an amount of the cooling liquid force-fed by the pump is set to an amount within such a range that the valve body of the liquid shutoff valves whose coil is energized is not displaced in a valve-opening direction while the valve body of the liquid shutoff valves whose coil is not energized is displaced in the valve-opening direction.

Cooling liquid circulation device for internal combustion engine

Growing community of inventors

Anjo, Japan

Ryusuke Sasaki