Nippondenso Co., Ltd.

Jirou Asai

Masahiko Suzuki

Masatoshi Kuroyanagi

Akira Takagi

Fumiaki Murakami

Yuichi Imani

Yoshimi Natsume

Kiyomitsu Kozawa

Akira Ito

A drive line device for an automotive vehicle is provided which includes a transmission and a clutch consisting of a flywheel connected to an engine and a clutch disc connected to an input shaft of the transmission. The drive line device includes a brake unit which applying a brake to a given peripheral portion of the flywheel so as to synchronize rotation of the input shaft of the transmission with rotation of an output shaft of the transmission when a gear shift is achieved.

Drive line apparatus for automotive vehicle

A stepping motor unit includes a stepping motor of the type wherein the interior of the stepping motor is filled with an oil, a detector for detecting the temperature of the oil in the stepping motor, a device for varying an upper limiting value of the rotational speed of the stepping motor and an upper limiting value of the rotational acceleration of the stepping motor in view of a current viscous condition of the oil based on the temperature detected by the temperature detector, and a driver for driving the stepping motor at a rotational speed and a rotational acceleration which fall in ranges, respectively, not exceeding the upper limiting values. The stepping motor unit thus constructed has rapid and accurate response characteristics and is capable of operating reliably without falling out of step even when the environmental temperature varies in a very wide range. A rotary control valve incorporating such stepping motor unit is also disclosed.

Stepping motor unit and rotary control valve incorporating the same

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Aichi, Japan

Jirou Asai