Toyota Jidosha Kabushiki Kaisha

Yuki Miyamoto

Keiichi Uno

Yoshihiro Saeki

Manabu Orihashi

Hiroki Sato

Masaki Morita

Wataru Matsubara

Keiko Tanaka

Takayuki Kumamoto

Satoru Shiga

Masahide Ishikawa

Kaname Uzuki

Atsushi Morita

Miyuki Matsuda

Hiroki Nishimura

During the time period from the start of an engine to the completion of a catalyst warming-up, the drive of a blower in an air-conditioning equipment is inhibited to suppress the heat-exchange of the air, which is caused to flow in an air duct by the drive of the blower, with cooling water in a heater core disposed in a circulating passage. Therefore, the heat generated in the engine is restrained from being fed to the inside of a compartment through that air after fed to the cooling water. As a result, the temperatures of the engine and the cooling water rise quickly, and the temperature of the exhaust of the engine rises so that the heat is efficiently fed to the catalyst through the exhaust. This means that the heat generated in the engine is preferentially fed through the exhaust to the catalyst that is the portion needing the feed of heat at a low temperature, other than the compartment in the automobile.

Vehicular control device

When there is an extremely low ambient temperature, an electronic control unit controls operation of a circulation path for coolant water in such a manner that, after starting of an engine, the coolant water is supplied from the engine first to a throttle valve and an EGR valve and then to an oil warmer for a transmission. This solves a failure problem in the throttle valve and the EGR valve caused by frost formation at an early stage. As a result, desired operating performance of the vehicle is quickly ensured and heat management in the vehicle is carried out in a desired manner when there is an extremely low ambient temperature.

Vehicle heat management device

Growing community of inventors

Toyota, Japan

Yuki Miyamoto