Regulated dashpot with shock-absorption force controls
AssigneeThyssenKrupp Bilstein Suspension GmbH
InventorsAlfred Preukschat, Jurgen Adamek
Life of this patent
Estimating the term…
Abstract
A regulable dashpot with shock-absorption force controls, especially intended for motor vehicles, with at least one flow-regulating system including one or more shock-absorption components for the compression phase and/or for the decompression phase. The object is to allow the dashpot to shift continuously between the hard and soft phases, whereby the valve-adjustment intervals can be varied at intervals that are not unnecessarily short or even unattainable. At least one valve assembly is accordingly supplied with variable flow impedance by regulating valve.
Claims11
A regulated dashpot with shock-absorption force controls, for motor vehicles, comprising:
- at least one flow-regulating system including at least one shock-absorption component for a compression phase and for a decompression phase, a main valve assembly of said shock-absorption component is formed by at least one valve assembly with electrically variable flow resistance, regulated by a regulating valve with variable flow constriction, said flow resistance being continuous for providing continuous damping between soft and hard damping;
- at least one fixed bypass valve with a non-varying constricted flow cross-section, hydraulically and directly paralleling the flow-regulating system, said fixed bypass valve having a constant opened flow-through cross-section hydraulically in parallel with said regulating valve;
- wherein,
- said fixed bypass valve is integratable into said flow-regulating system and has a minimal passage for hydraulic fluid;
- said fixed bypass valve has a constant non-adjustable flow cross section;
- and
- said regulated dashpot further comprises preset pressure-dependent valves for said compression phase and said decompression phase being preset with a hard performance curve, said valves hydraulically paralleling said flow-regulating system and said shock absorption component.
An adjustable dashpot assembly with shock absorption force controls, said dashpot assembly comprising:
- a dashpot having a piston that is displaceable within a cylinder;
- at least one flow regulating shock absorbing system that includes at least one variable valve assembly for shock absorption in a compression phase and in a decompression phase;
- at least one fixed bypass valve with a nonvariable constricted flow cross section that is constantly opened and is hydraulically in parallel with said variable valve assembly;
- and
- a preset pressure dependent valve assembly for at least one of compression and decompression phases and being preset with a hard damping characteristic, said preset pressure dependent valve assembly hydraulically paralleling the flow regulating shock absorbing system;
- wherein,
- said at least one variable valve assembly has a variable flow resistance that is regulated by a regulating valve with a continuously variable flow constriction;
- said flow resistance of said variable valve assembly is continuously variable for providing continuous damping according to shock absorption performance curves settable anywhere between hard and soft.
Dependencies are inferred from the claim text.