Damper limiting system
AssigneesThyssenKrupp Bilstein of America Inc., thyssenkrupp AG
InventorsJoseph Hurd, Austin Vibbard, Jayson Moore, Bill Bryant
Life of this patent
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Abstract
A hydraulic vibration damper includes a housing assembly and a rod assembly. The housing assembly includes a main housing, an end cap and a rebound cut off (RCO) assembly. The rod assembly includes a hollow piston rod coupled to a main piston assembly. The main piston assembly includes a main piston that is displaced along the main housing between extension and compression directions. The RCO assembly is disposed between the main housing and the hollow piston rod and includes an RCO piston and an RCO flask. The RCO flask has a flask body including at least one flask passage defined therein that communicates hydraulic fluid along the flask body.
Claims20
A hydraulic vibration damper comprising:
- a housing assembly including a main housing, an end cap and a rebound cut off (RCO) assembly;
- a rod assembly including a hollow piston rod coupled to a main piston assembly, the main piston assembly having a main piston that is displaced along the main housing between extension and compression directions;
- and
- wherein the RCO assembly is disposed between the main housing and the hollow piston rod, and comprises:
- an RCO piston having a piston body including a first engaging surface, a second engaging surface and an outer annular sliding surface;
- an RCO flask having a flask body including an inner diameter surface and an outer diameter surface, the RCO flask body defining at least one flask passage defined therein that communicate hydraulic fluid along the flask body;
- and
- wherein the RCO piston is configured to translate relative to the RCO flask during a rebound event due to urging of the main piston, wherein during the translation, the hydraulic fluid is caused to flow (i) from a high pressure zone between the hollow piston rod and the RCO flask;
- (ii) along the at least one passage;
- and (iii) into a low pressure zone between the RCO flask and the main housing.
A hydraulic vibration damper comprising:
- a housing assembly including a main housing, and end cap and a rebound cut off (RCO) assembly;
- a rod assembly including a hollow piston rod coupled to a main piston, the main piston having a main body that includes an annular wall having an end working surface thereon, wherein the main piston is displaced along the main housing between extension and compression directions;
- and
- wherein the (RCO) assembly is disposed between the main housing and the hollow piston rod and comprises:
- an RCO piston having a piston body including a first engaging surface, a second engaging surface and an outer annular sliding surface;
- an RCO flask having a flask body including an inner diameter surface and an outer diameter surface, the RCO flask body defining at least one flask passage defined therein from the inner diameter surface to the outer diameter surface;
- and
- wherein the first engaging surface of the RCO piston is engaged by the end working surface of the main piston causing the RCO piston to translate relative to the RCO flask during a rebound event, wherein during the translation, hydraulic fluid is caused to flow through the at least one passage and past the main piston to a compression side of the main piston.
Dependencies are inferred from the claim text.