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US 12,304,264 B2Granted
Spring-damper system
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorMaximilian Dietrich
Life of this patent
Estimating the term…
Abstract
A spring-damper system for a wheel suspension of a motor vehicle comprise a support spring of a spring constant kT and a damper acting in parallel to the support spring. A spring element is arranged in series with the support spring and can be controlled by means of a controller in such a way that a total spring constant kG of the spring-damper system can be varied.
Claims13
A spring-damper system for a wheel suspension of a motor vehicle, comprising:
- a load-bearing spring with a spring constant and a damper acting parallel to the load-bearing spring, and
- a spring element which acts in series with the load-bearing spring, the spring element being controllable by a control device in such a manner that an overall spring constant of the spring-damper system can be varied,
- wherein the spring element comprises:
- a spring unit,
- a cartridge having a cartridge interior space,
- a piston rod for coupling to the load-bearing spring, the piston rod extending into the cartridge interior space, and
- a main piston arranged in the cartridge interior space at an end of the piston rod, the main piston having a bypass for a hydraulic fluid to pass through the main piston, and a valve positioned on the main piston having an adjustable valve aperture controllable by the control device for controlling the flow of the hydraulic fluid through the bypass.
4 more elements
Dependencies are inferred from the claim text.