Nissan Motor Company Limited

Hitachi, Ltd.

Yasuhiko Fujiwara

Toshiro Abe

Kazuhiro Doi

Shinichi Matsui

Kenzo Hirashima

Takeshi Atago

Masami Nagano

Shinsuke Nakazawa

Hisakazu Murakami

Atsunori Hashimoto

Yoshio Serizawa

A vibration damping device includes first and second accelerometers which are used to determine the relative displacement between a body and a base between which the device is operatively connected. The output of one of the accelerometers is also monitored in a manner to determine the frequency of the vibration. This data is processed in a manner to ascertain the timing when the phases of a vertical spring input (produced by the compression of an elastomeric member which defines the main spring of the damper) and an expansion spring input (produced the displacement of rheopetic fluid between first and second variable volume chamber and the associated expansion characeristics of the members defining the same) are reversed. Using this data and the vibration frequency data the timing with which a voltage should be applied to electrodes disposed in an orifice interposed between the first and second chambers to increase the viscosity of the rheopetic fluid and increase the flow resistance of the orifice. The device further includes a perforate suspended mass which is tuned in a manner to act as a dynamic damper.

Electronically controllable vibration damping device

A vibration damper includes first and second electrode bodies which are operatively connected with a vibrating body and a base, respectively and which are immersed in a rheopetic fluid. The relative velocity and displacement between the body and the base are determined and used to control the voltage applied across the electrode bodies in manner wherein when the relative displacement and velocity are out of phase, a high voltage is applied to electrodes to induce a high damping force and as the period wherein the two parameters go in phase is approchaed, the voltage is continuously reduced to reduce the damping force.

Electronically controllable vibration damper for use with automotive

An ignition timing adjusting apparatus of an internal combustion engine is provided so as to suppress the vibration of the body of a vehicle when it is accelerated. This is achieved by obtaining a first ignition timing compensation magnitude determined on the basis of the revolution speed fluctuation of the internal combustion engine and a second ignition timing compensation magnitude determined on the basis of the engine load condition, and by compensating a basic ignition timing in accordance with the first and second ignition timing compensation magnitude when the vehicle is accelerated.

Ignition timing adjusting apparatus for internal combustion engine

A preload device for a harness is mounted fixedly to a motor vehicle seat and the harness is also fixed to the seat, so that relative relation between the harness and the seat is constant irrespective of longitudinal adjustment of the seat with respect to floor of motor vehicle.

Seat for automobile

A steering column is split into two column sections, the rear upper section of which is tiltable in a direction away from the head of a vehicle driver during a collision of the vehicle.

Vehicle driver protecting steering arrangement

A steering column assembly for a motor vehicle having a collision sensor which provides a collision signal in the event of a collision. It comprises a telescopic steering rod having a lower part and an upper part carrying a steering wheel, and means for normally stopping the upper part axial movement relative to the lower part in its normally operative position and for driving the upper part to a retracted safe position in the direction toward the lower part upon receipt of the collision signal.

Steering column assembly

An inertia sensor switch comprises an insulating housing having an electrical contact plate connectable to one electric terminal, an electrical contact mass abuttingly engageable with the electrical contact plate and resilient means for holding the electrical contact mass to a position spaced from the electrical contact plate, in which the resilient means is a U-configured resilient strip of an electrical conductive material having one leg fixed to the electrical contact mass and other leg secured to the interior of the insulating housing, the other leg being connectable to another electric terminal cooperating with the one electric terminal, the U-configured resilient strip lying in a plane normal to deceleration due to up and down vibration of the vehicle, the U of the U-configured resilient strip being open to a transverse direction relative to a longitudinal direction of the vehicle.

Growing community of inventors

Yokohama, Japan

Yasuhiko Fujiwara