Beijingwest Industries Co., Ltd.

Bwi Company Limited S.a.

Beijing West Industries

Pawel Slusarczyk

Jakub Wrzesinski, Ii

Waldemar Widla

Marcin Knapczyk, Ii

Robert Kapolka

Bartlomiej Franczyk

Janusz Pawel Goldasz

Jakub Wrzesinski

Zbigniew Szklarz

Marcin Knapczyk

Marcin Zborowski

Sebastian Kaffanke

Krystian Marcin Andres

Olaf Krazewski

A damper assembly includes a housing having a tubular shape defining a main chamber extending along a center axis. A piston is movable along the center axis and divides the main chamber into a compression chamber and a rebound chamber. The piston includes a piston body defining a frequency-adaptive orifice (FAO) passage providing fluid communication between the compression chamber and the rebound chamber. The piston includes an FAO valve assembly having an FAO cover member configured to block fluid flow therethrough in response to application of a low-frequency excitation, and allowing fluid flow through the FAO passage in response to application of a high-frequency excitation. The FAO valve assembly also includes a tappet configured to translate relative to the piston body to bias the FAO cover member to selectively cover the FAO passage in response to the application of the low-frequency excitation.

Damper assembly with frequency adaptive orifice

The present invention relates to a hydraulic damper, comprising a tube, a piston assembly comprising compression and rebound valve assemblies, and a controllable solenoid valve. The piston assembly further comprises a housing; first, second and third partition members; first, second, third and fourth check valves; and one or more radial channels; wherein said first partition member has a first axial opening and the solenoid valve has a valve member provided with at least one inlet in fluid communication with said first axial opening, and one or more outlets in fluid communication with said first internal chamber, wherein said second partition member has a second axial opening; wherein said first axial opening and said second axial opening allow the working liquid to flow from said third internal chamber to said at least one inlet of the solenoid valve bypassing said second internal chamber.

Variable stiffness hydraulic damper

The present invention relates to a hydraulic damper comprising a tube and a piston assembly provided with rebound valve assemblies and compression valve assemblies, wherein each valve assembly comprises a deflectable-disc valve and a blow-off valve. The piston assembly comprises two sleeve-shaped members each provided with a plurality of blow-off valve flow passages, a plurality of deflectable-disc valve flow passages, and a central opening, wherein the piston rod passes through said central openings to secure the piston assembly, a plurality of deflectable disc(s) of the deflectable-disc valve cover(s) said deflectable-disc valve flow passages , wherein a plurality of disc(s) of the blow-off valve adjoin(s) said blow-off valve flow passages, wherein the piston assembly further comprises two spring seats abutting said disc(s) of the blow-off valve, and at least one spring disposed within said internal chamber that biases said spring seats towards said number of discBP-S20010US(s).

Hydraulic damper with piston assembly having blow-off valves

A hydraulic damper assembly comprises a housing defining a fluid chamber. A piston is slidably disposed in the fluid chamber dividing the fluid chamber into a compression and a rebound chamber. A piston rod couples to the piston for movement between a compression and a rebound stroke. The piston has a compression surface and a rebound surface. The piston defines at least one compression channel, at least one rebound channel, and at least one additional channel. A compression valve covers the at least one compression channel. A rebound valve covers the at least one rebound channel. A proportional bleeding system located between the compression valve and the piston to establish a bleeding flow passage between the at least one rebound chamber and the at least one additional channel for reducing operation harshness of the hydraulic damper assembly. A piston for the hydraulic damper assembly is also disclosed herein.

Hydraulic damper and a piston for the hydraulic damper assembly

A damper assembly comprises a main tube extending along a center axis between a first end and a second end defining a fluid chamber. A main piston is disposed in the fluid chamber dividing the fluid chamber into a compression chamber and a rebound chamber. A piston rod extends along the center axis coupled to the main piston. An external tube extends about the main tube and defines a compensation chamber therebetween. The external tube includes a protrusion extending radially inwardly from an opened end to abut the main tube. An external piston is located in the compensation chamber and coupled to the main tube, dividing the compensation chamber into a first compartment and a second compartment. The first compartment extends between the protrusion and the external piston for containing a working fluid. The second compartment extends between the closed end and the external piston for containing a gas.

Telescopic damper assembly

A damper assembly comprises a housing disposed on a center axis and defining a fluid chamber for containing a working fluid. A piston is slidably disposed in the fluid chamber dividing the fluid chamber into a compression chamber and a rebound chamber. A piston rod attaches to the piston for moving the piston in the housing. The piston includes a first portion and a second portion defining a first perforation. An outer sleeve has an exterior surface and an interior surface and extends between the first portion and the second portion covering the first perforation. The piston includes a first entry valve and a second entry valve located in the piston and coupled to the piston for limiting the working fluid from flowing into the piston with the first entry valve being disposed adjacent the first portion and the second entry valve being disposed adjacent the second portion.

Damper assembly and a piston for a damper assembly

A damper assembly includes a main tube disposed on a center axis and extending between a first and a second end defining a fluid chamber for containing a working fluid. A main piston is slidably disposed in the fluid chamber dividing the fluid chamber into a rebound chamber and a compression chamber. A piston rod is attached to the main piston for moving the main piston between a compression and a rebound stroke. The piston rod includes a rod extender attached to the main piston defining a compartment. A compression stop including an additional piston is slidably disposed in the compartment and movable between a first position in response to the compression stroke and a second position in response to the rebound stroke. The first position is the additional piston being disposed adjacent the main piston. The second position is the additional piston being axially spaced from the main piston.

Hydraulic damper with a compression stop assembly

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 twin tube damper assembly includes a main tube defining a fluid chamber. An external tube extends about the main tube defining a compensation chamber therebetween. A piston, slidably disposed in the fluid chamber, divides the fluid chamber into a compression chamber and a rebound chamber. A rod guide is disposed in the rebound chamber, attached to the main tube and the external tube, defining at least one channel in fluid communication with the rebound and compensation chambers. A piston rod extends through the rod guide and is attached to the piston. A pressure rate sensitive system, disposed in the rebound chamber, is attached to the rod guide in fluid communication with the at least one channel, the rebound chamber, and the compensation chamber for regulating the working fluid flow through the rod guide between the rebound and compensation chambers during compression and rebound strokes.

Twin tube damper including a pressure rate sensitive system

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 damper including a piston assembly having a piston body including at least two first channels and at least two second channels. The first and second channels are sloped. A compression side of each of the first channels is positioned radially outward relative to a rebound side. A rebound side of each of the second channels is positioned radially outward relative to a compression side. At least one main disc at least partially covers the rebound side of each of the first channels, and at least one main disc at least partially covers the compression side of each of the second channels. At least one supplementary channel is positioned radially inward with respect to the first and second channels. At least one supplementary disc at least partially covers at least one of a rebound side and a compression side of the at least one supplementary channel.

Hydraulic damper with an x-flow piston assembly

A hydraulic damper () includes a tube (), a piston assembly () disposed slidably inside the tube (), and an additional valve assembly (). A compression chamber () is defined between the piston assembly () and the additional valve assembly (). An additional compensation chamber () is defined between the additional valve assembly () and one side of a slideable partition (). A gas chamber () is defined at the other side of the slidable partition (). The damper includes an additional chamber assembly () to retain all the advantages of a twin-tube damper while providing the single construction offered by a mono-tube damper. One end of the additional chamber assembly () is attached to the slidable piston chamber () or to said piston rod () at the compression side thereof and the other end of said additional chamber assembly () is terminated with the additional valve assembly ().

Hydraulic suspension damper

A hydraulic damper () includes a first piston body member (), a second piston body member (), a third piston body member (), and a compression stroke disc assembly () compressed at a radially inner side thereof between the first () and said second () piston body members. The hydraulic damper includes a rebound stroke disc assembly () compressed at the radially inner side thereof between the second () and third () piston body members, and the compression stroke disc assembly () additionally includes an annular supporting member () positioning discs (-) of the compression stroke disc assembly () at radially inner side thereof, while a radially inner axial passage () is defined at the radially inner side of the supporting member ().

Hydraulic damper

A hydraulic damper () includes a tube () filled with working liquid, wherein at least one end of the tube () is provided with a narrower section () of a smaller diameter provided with at least one axial groove (). The damper () includes at least one additional piston assembly () having diameter (D) smaller than diameter (D) of the main section of the tube (), displaceable along with the main piston assembly () and apt to be introduced in the narrower section of the tube () to generate additional damping force. The narrower section () extends through a conical section () into the main section () of the tube () and the conical section () of the tube () is internally shaped to form axial bridges () defining said axial grooves () extending along the length of said conical section (), each comprising a cylindrical section ().

Hydraulic damper with a hydraulic stop arrangement

A hydraulic damper () includes at least one spring valve assembly () having a body () provided with through flow channels (), at least one deflectable disc () covering these through flow channels (), and a supporting member () fixed to an axial member for clamping the at least one disc () at the inner circumferential part thereof. A spring seat () is disposed around the supporting member () and abuts the at least one deflectable disc () in at least one radial position () at the outer circumferential part thereof. A spring () is preloaded between the spring seat () and the supporting member (). The spring seat () includes at least one axial projection () perimetrically engaging the at least one disc (), and a circular gap () is provided between the spring seat () and the supporting member ().

Growing community of inventors

Cracow, Poland

Pawel Slusarczyk