Toyota Jidosha Kabushiki Kaisha

Aisan Kogyo Kabushiki Kaisha

Hirohisa Ito

Yoshikazu Shinpo

Isao Takagi

Shigetaka Yoshikawa

Daisuke Yamamoto

Masahiro Kobayashi

A flow control valve used in a cooling system of a water cooling type includes a first valve body and a first valve seat for controlling a quantity of radiator flow which returns from an engine to a pump through a radiator, a second valve body and a second valve seat for controlling a quantity of bypass flow which returns from the engine to the pump without passing through the radiator, and a step motor for displacing the valve bodies integrally as a valve unit. The first valve body, the first valve seat, the second valve body, and the second valve seat are so arranged that, in a range where the radiator flow quantity becomes practically zero, the bypass flow is permitted to flow at a slightly larger quantity than the radiator flow and, in other ranges, the bypass flow quantity is equal to or lower than the radiator flow quantity.

Growing community of inventors

Obu, Japan

Hirohisa Ito