Hitachi Automotive Systems, Ltd.

Kenichi Nakamura

Shunsuke Mori

Takao Nakadate

A shock absorber includes: at least one cylinder apparatus including a cylinder sealingly containing operating fluid, a piston slidably fittedly inserted in the cylinder to divide an interior of the cylinder into two chambers, and a piston rod coupled to the piston and extending to an outside of the cylinder; and at least one damping force generation mechanism connected to the cylinder apparatus, and capable of generating a damping force to be applied to a flow of the operating fluid caused by a movement of the piston and adjusting the damping force from the outside. The damping force generation mechanism includes a damping valve for generating the damping force, a pilot chamber for applying a pilot pressure by the operating fluid to the damping valve, and a pump for at least supplying or discharging the operating fluid to or from the pilot chamber.

Shock absorber and suspension apparatus

A volume compensation accumulator apparatus connected to a conduit connecting hydraulic cylinders in a suspension system. The volume compensation accumulator apparatus includes an arrangement of the two orifice plates in series in a spaced-apart relation, which eliminates the necessity of reducing the diameters of the orifices while providing the same orifice characteristic as that of an orifice having a smaller diameter, thereby making the boring process of the orifice easy, and reducing clogging of the orifices with foreign objects.

Growing community of inventors

Kawasaki, Japan

Kenichi Nakamura