Hitachi Astemo Ltd.

Hitachi Automotive Systems, Ltd.

Hidefumi Hatsuzawa

Makoto Kawano

Takuya Tanaka

Toshio Hori

Yoshihiko Akagi

Hiroyuki Ota

Toyoshi Nemoto

Takafumi Saito

Yutaka Takeuchi

Kazuya Ishihara

An object of the present application invention is to provide a throttle valve control device capable of effectively cooling a bearing of a throttle shaft while preventing an increase in size of a throttle body. Therefore, in a throttle valve control device in which flow pathsTtoTthrough which a heat exchange medium flows are formed in a throttle body, the diameter of a first bearingof a throttle shaftis greater than the diameter of a second bearing, the flow pathsTtoTare disposed along an outer periphery of an intake passageto overlap with the second bearingwhen viewed from a flow direction of the intake passage, and an inlet portionTand the outlet portionTof the flow pathsTtoTare disposed to sandwich the first bearing

Throttle valve control device

Provided is an electronically controlled throttle device configured to reduce size of a motor and concurrently to enhance reduction of a noise of the motor. The electronically controlled throttle device includes: a body including a throttle valve; a motor provided with a brush, the motor configured to drive the throttle valve; a bracket (F) configured to attach the motor to the body; a pigtail connected electrically to the brush, and arranged on a surface of the bracket (F), the surface facing the motor; and a filter circuit (an inductor (), a capacitor (), and a resistor ()) connected electrically to the pigtail and configured to reduce the noise of the motor. The filter circuit is arranged on a surface of the bracket (F), the surface opposite the motor.

Electronically controlled throttle device

An object is to provide a type of device capable of properly cooling a bearing of a throttle body even under a condition that the throttle body receives heat of high-temperature intake air or exhaust gas. In the present invention, an engine coolant passage that guides a coolant of an engine is provided integrally with a member fixing a bearing to be adjacent to a circumferential wall of the bearing of the member fixing the bearing, which supports a throttle shaft, and heat transferred from the bearing (or likely to be transferred to the bearing) via the member fixing the bearing is carried away to the outside of a throttle body by the engine coolant.

Valve body, electronic control throttle body, motor-driven throttle body, and valve device

Growing community of inventors

Hitachinaka, Japan

Hidefumi Hatsuzawa