Unisia Jecs Corporation

Atsugi Motor Parts Company, Limited

Hideaki Saito

Junichi Emura

Issei Kanari

A control cylinder unit for varying a spring constant of a vehicular stabilizer includes a cylindrical fluid chamber divided into upper and lower liquid chambers by a slidably inserted piston. The upper and lower liquid chambers are communicated with each other through a controlled rotary valve installed in a piston rod connected to the piston. A reservoir chamber is formed around the liquid chamber and is communicated with the upper and lower liquid chambers through first and second check valves installed at upper and lower ends of the liquid chamber. The first and second check valves function to allow fluid from the reservoir chamber into the upper and lower liquid chambers. Further, a hole for communicating the liquid chamber and the reservoir chamber is formed at a center portion of a cylindrical wall of the fluid chamber.

Control cylinder unit for varying spring constant of vehicular stabilizer

A variable-damping-force shock absorber in which the motor for rotating the orifice adjuster is housed within the cylinder and the orifice-adjuster position sensor for outputting binary coded sensor signals is incorporated. Therefore, it is possible to reduce noise generated from the motor while improving the lifetime of the motor because mud or rain water will not adhere onto the motor and to improve the precision and the response speed in rotating the orifice adjuster because the adjuster can be feedback controlled in digital fashion. Further, since the driven shaft of the motor or the reduction gear is loosely coupled with the orifice adjuster in the axial direction thereof, it is possible to reduce the torque or the size of the motor, because fluid pressure is not directly applied to the driven shaft via the orifice adjuster.

Growing community of inventors

Atsugi, Japan

Hideaki Saito