Toyota Jidosha Kabushiki Kaisha

Ryu Hamaguchi

Takasuke Shikida

In a cooling device for a vehicle having a main passage through which coolant water is circulated between the interior of an engine and a radiator, a heater passage through which the coolant water is circulated between the interior of the engine and a heater core, and a thermostatthat operates in response to the temperature of the coolant water and selectively permits and stops circulation of the coolant water in the main passage, the heater passage is used as a heater/bypass passage, which functions also as a bypass passage, through which the coolant medium is circulated without passing through the radiatorwhen the engine warms up. This makes it unnecessary to form a separate bypass passage, thus simplifying the passage configuration.

Cooling device for vehicle

A warming-up device of an internal combustion engine includes a latent heat storage material accommodated in the interior of the internal combustion engine and radiating heat based on a phase change, and a nucleation device within the heat storage material and operating to prompt the phase change of the heat storage material under a supercooled state. The nucleation device is operated based on an oscillation generated at a time of starting the engine. As a result, the warming-up device of the internal combustion engine dispenses with a machining operation for forming a through port passing through the interior and an outside of the heat storage material, a seal around the through port and an electric circuit, and the device is inexpensive and has a simple structure.

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Aichi-ken, Japan

Ryu Hamaguchi