Beijingwest Industries Co., Ltd.

Bwi Company Limited S.a.

Waldemar Widla

Pawel Slusarczyk

Jakub Wrzesinski, Ii

Grzegorz Gasior

Lukasz Chyla

Janusz Pawel Goldasz

Radoslaw Pawel Grzesik

Marcin Knapczyk, Ii

Zbigniew Szklarz

Marcin Knapczyk

Jakub Wrzesinski

Marcin Zborowski

Marcin Steliga

Sebastian Kaffanke

Krystian Marcin Andres

Michal Dariusz Maniowski

Olaf Krazewski

A piston assembly for a damper includes a main piston disposed on a center axis. A piston rod is attached to the main piston. A regulator extends between the piston rod and the main piston defining a compartment. The regulator has at least one first aperture and at least one second aperture. A restrictor divides the compartment into a first and second portion. An actuator having a core is disposed in the first portion movable between an opened and a closed position. The restrictor includes a sleeve disposed in the compartment and attached to the regulator. The sleeve defines a hole in fluid communication with the first and second portions and flares outwardly in the first portion toward the regulator to define a slanted edge extending at an oblique angle relative to the center axis to allow the working fluid to flow smoothly thereby limiting noises generated.

Dual ride damper assembly

A hydraulic damper includes a piston rod attached to a slidable piston assembly having a hollow housing with first and second valve assemblies disposed therein and each including a valve body and rebound and compression discs for regulating flow of a working fluid through the piston assembly. The first valve assembly is disposed about a sleeve with a valve nut securing them within the housing. The second valve assembly is threadedly secured in the housing, with a pin holding it together. The housing including a coil and an armature, axially slidable through a plunger guide with a spring biasing the armature to a first position with fluid allowed to flow through the sleeve to bypass the first valve. The armature slides to a second position with fluid not bypassing the first valve in response to the coil being energized by an electrical cable which extends through the piston rod.

Dual mode hydraulic damper

A hydraulic suspension damper includes a tube having an opened end and a closed end defining a compartment. A main piston is disposed in the compartment dividing the compartment into a compression chamber and a rebound chamber. A piston rod is attached to the main piston. A rod guide is disposed at said opened end. A stroke stop arrangement includes an insert and an additional piston attached to the piston rod. The insert has a narrowed section including an inner surface defining at least one recess between the distal end and the rod guide and extends axially along the insert in fluid communication with the compression chamber for allowing working liquid flow from the rebound chamber to the compression chamber during the rebound stroke. The at least one recess includes three recesses disposed equidistantly and spaced from one another.

Hydraulic suspension damper with hydro-mechanical stroke stop

A hydraulic damper includes at least one valve assembly () provided with rebound () and compression () valves and at least one resilient deflective disk covering flow channels () of the valve assembly and preloaded by a spring (). The hydraulic damper includes means for clamping together the components of the at least one valve assembly and for preloading the spring. In order to increase the repeatability coefficient among dampers of the same production batch and render it independent on the geometrical tolerances of the valve assembly components, the means have a form of an adjustable nut assembly () comprising a clamp nut () and a shoulder sleeve () fixed on the perimeter of the clamp nut. The clamp nut clamps together the components of the valve assembly and the shoulder sleeve preloads the spring with a predetermined force. method of assembling such a damper.

Hydraulic suspension damper and method of assembling thereof

A hydraulic damper () comprises a tube () filled with working liquid, inside of which a slidable piston assembly () is attached to a piston rod () and provided with at least one valve assembly () to control the flow of working liquid passing through the piston assembly () during rebound and compression stroke of the damper. The valve assembly () contains a floating disc valve () and additionally comprises a unidirectional check valve disc () disposed serially with the floating disc valve () across the passage of the flow of working liquid during compression or rebound stroke of the damper (). Preferably the piston assembly () forms a symmetrical cross-flow arrangement and preferably the at least one valve assembly includes compression () and rebound () valve assemblies of the piston assembly () which each have the same constructions.

Hydraulic suspension damper with a floating disc valve

The invention relates to a hydraulic damper (), in particular for the suspension system of a motor vehicle comprising a tube () filled with working liquid, inside of which a slidable piston assembly () is placed. To increase an amount of dissipated energy during extremely fast compression strokes, the damper () is provided with an additional compression valve system (), preferably in a form of a preassembled add-on device, which is attached to the piston rod () in a compression chamber () and comprises a hollow main body () surrounding the piston rod () and provided with a substantially flat first abutment surface () with a radially inner portion and a radially outer portion defining the close position of the system (), and at least one channel () the inlet of which is located within the area of the first abutment surface (), a compression spring () supported within the hollow main body () underneath the first abutment surface (), a substantially rigid and relatively thin plate () biased by the spring () against a second abutment surface () defining the open position of the system (), wherein the plate is free to deflect and displace between said open position and said close position, and the outside diameter of said hollow main body () is less than the inner diameter of the tube () and the hollow main body () is provided with an annular groove () inside of which a cross-cut ring () is disposed to form a sliding fit of the hollow main body () within the tube ().

Hydraulic suspension damper

The invention relates to a hydraulic damper, in particular for the suspension system of a motor vehicle, comprising a tube filled with working fluid; a piston assembly slidably positioned inside the tube; a fluid compensation chamber located outside of the tube, and a base valve assembly at the end of the tube for controlling the flow of working fluid between the tube and the compensation chamber. A compression valve module added between the piston assembly and the base valve assembly allows the damping to increase during extremely fast compression strokes without modification of the other damper components, affecting neither tuning options nor performance in a normal operating range of piston velocities.

Hydraulic damper with compensation chamber

The invention relates to a suspension hydraulic damper () comprising a tube () filled with working liquid, inside of which a slidable piston assembly (), provided with compression () and rebound () valve assemblies and attached to a piston rod () led outside the damper (), is placed, and at least one compression valve system (). To increase an amount of dissipated energy during extremely fast compression strokes the compression valve system () comprises at least one substantially thin closing element (), preferably in a form of a flat floating disc, having an outside diameter less than the inner diameter of the tube () and being axially slidable with respect to the piston rod () axis, a spring () surrounding the piston rod () axis and pressing the closing element against a retainer () into an open position, an abutting surface () for the closing element () in a closed position, and at least one passage () for the flow of damping medium in the closed position.

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Cracow, Poland

Waldemar Widla