Unisia Jecs Corporation

Hiroshi Hoya

Makoto Kimura

Chiharu Nakazawa

Katsuya Iwasaki

Michiya Hiramoto

Susumu Shinozaki

Kohtaro Shiino

A suspension control system for an automotive vehicle is provided. This suspension control system comprises front and rear variable damping force shock absorbers and a control unit which controls the shock absorbers to assume damping force characteristics in a range between preselected higher and lower damping coefficients. The control unit controls the front and rear shock absorbers in a manner wherein the damping force characteristics of the front shock absorber in an extension stroke and of the rear shock absorber in a compression stroke are modified to the higher damping coefficients respectively when vehicle speed is substantially zero.

Automotive suspension control system utilizing variable damping force

A fixing bracket for a pressurized fluid buffer device such as a shock absorber or the like is formed as a single piece U-shaped bracket having a circular body portion for surrounding an outer cylinder of the shock absorber and opposed mounting flange portions for attachment to a vehicular chassis. At a location axially outward of the location of bolt holes for attaching the fixing bracket, opposes pairs of projected tooth portions are provided oriented toward each other to contact an exposed portion of the outer cylinder. According to this structure, during vehicle bouncing, for examples the tooth portions are urged to wedge, or bite into the outer cylinder for counteracting forces in a separation direction of the flange portions. Thus, strength is improved while installation processing is reduced. Further, according to this arrangement both manufacturing and installation costs may be significantly reduced while structural features and design flexibility are improved.

Mounting bracket for pressurized fluid buffer device

In a hydraulic shock absorber having a variable damping force characteristic structure, at least one extension phase one-way passageway and one compression phase one-way passageway are formed in a piston body so as to allow a fluid flow to be communicated between a first chamber and a second chamber in the extension and compression phases, respectively, and a grooved control rod forms a control valve element rotatably disposed in a hollow rod extended in a cylinder containing damping fluid. Extension and compression phase throttles are formed in the extension and compression phase one-way passageways by ports radially penetrated through a side wall of the hollow rod and the grooved control rod whose fluid cross sectional areas are varied according to a rotated position of the grooved control rod. In addition, four disc-shaped damping valves are formed in an interior of the cylinder.

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Atsugi, Japan

Hiroshi Hoya