Fluid flow regulation of a vehicle shock absorber/damper
AssigneeThyssenKrupp Bilstein of America Inc.
InventorsBret M. Norgaard, Douglas J. Cimins
Life of this patent
Estimating the term…
Abstract
Shock absorber components, such as a radial bypass damper, an anti-cavitation valve (ACV) and an incremental flow metering valve IFMV. The damper is of a continuous, unitary construction with a main hole and auxiliary holes interconnected by passageways. The ACV has openings that angle obliquely relative to entry surfaces of valving shims and extend at an incline continuously through the valving shims. The metering valve linearly regulates flow, substantially independent of piston displacement.
Claims16
An apparatus useful to regulate internal pressures in a shock absorber, said shock absorber comprising a fluid-containing cylinder and a working piston capable of moving back and forth within the cylinder in response to external forces, said apparatus comprising:
- a reservoir for receiving fluid from said cylinder upon being connected thereto;
- an anti-cavitation valve adapted to reduce fluid cavitation when said reservoir is connected to said cylinder, said fluid cavitation being caused by the movement of the working piston, and said anti-cavitation valve including:
- a valve body fixedly positioned within said reservoir, said valve body having opposite faces and a plurality of converging passageways that incline in a converging direction from one of the opposite faces to the other and a plurality of diverging passageways that incline in a diverging direction from the one of the opposite faces to the other, the converging and diverging passageways being separated from each other, and
- valving shims extending over said plurality of converging passageways and said plurality of diverging passageways, each of said valving shims being associated with either said converging passageways or said diverging passageways, each of said valving shims being movable with respect to the valve body in response to pressure within the reservoir, the anti-cavitation valve maintaining pressure between the working piston and the reservoir when the working piston transitions from one direction to another.
An apparatus comprising
- a shock absorber having a fluid containing cylinder and a working piston disposed in the cylinder capable of moving back and forth in response to external forces;
- a reservoir coupled to the shock absorber for receiving the fluid in a first chamber thereof, said reservoir further including a gas-filled second chamber and a floating piston separating the first and second chambers;
- and
- an anti-cavitation valve having a valve body fixedly attached to said remote reservoir between the working piston and he floating pistol and valving shims that move with respect to the valve body to open fluid coupling passageways extending though the valve body in response to pressure created by movement of the working piston, the anti-cavitation valve decreasing the pressure created within the second chamber by movement of the working piston and the anti-cavitation valve and second chamber serving to reduce fluid cavitation caused by movement of the working piston, the anti-cavitation valve maintaining pressure between the working piston and the reservoir when the working piston is in transition between a compression stroke and a rebound stroke.
Dependencies are inferred from the claim text.