Hitachi Automotive Systems, Ltd.

Hitachi, Ltd.

Hitachi Astemo Ltd.

Hiroshi Chikuma

Nobuyuki Ichimaru

Masaaki Uchiyama

Ryusuke Hirao

Kenichiro Matsubara

Tomohiro Nakamura

Kimio Nishino

Wataru Yokoyama

Yoshinori Kawai

Kan Kobayashi

Kenji Hashida

Takahisa Hirasawa

Aya Mizukoshi

Kazumasa Kawasaki

Manabu Shindo

A vehicle linear motor includes: a tubular casing; a pair of armatures placed and fixed in the casing; a mover formed in a flat plate shape and placed to face the pair of armatures and to be movable in the casing; and a support member configured to slidably support the mover such that the mover moves in a longitudinal direction of the mover. The mover formed in the flat plate shape includes a plurality of magnets that are arranged at intervals in the longitudinal direction. Each of the pair of armatures has a magnetic pole that is arranged to move the mover relative to the armatures in the longitudinal direction. The casing is mounted on a vehicle such that the longitudinal direction is a horizontal direction, and the mover and the armatures are placed to face each other in the horizontal direction.

Vehicle linear motor

A parking brake controller () activates an electric actuator () in response to operation of a parking switch () to hold a disc brake () to serve as a parking brake. If a failure (fault) is detected in the parking switch (), the parking brake controller () activates the electric actuator () so as to hold the parking brake automatically upon detecting a condition that presumes the vehicle operator's intent not to drive any longer while the vehicle is at rest.

Brake system

Shock absorbers of left and right front wheel suspensions and shock absorbers of left and right rear wheel suspensions each are constituted by a damping force adjustable hydraulic shock absorber provided with a frequency response unit. An actuator of a damping force variable mechanism provided to the shock absorber is driven and controlled by a controller. The controller variably adjusts the damping force between the soft side and the hard side by the damping force variable mechanism according to a vertical vibration when a vehicle body vertically vibrates at a low frequency. The controller does not adjust the damping force when the vehicle body vibrates at a higher frequency than the low frequency.

Suspension apparatus

An air-compressing apparatus has four compressors individually supplying compressed air to a tank having a pressure sensor. The pressure sensor is connected to control circuits of the compressors. The control circuits compute times needed for the tank pressure to reach minimum and maximum pressures, respectively, of the tank by using the detected tank pressure and also using a tank pressure change value. The computed time values correspond to the consumption of compressed air. Thus, the control circuits can control the number of compressors to be operated according to the consumption of compressed air.

Control system for air-compressing apparatus

Growing community of inventors

Matsudo, Japan

Hiroshi Chikuma