Parallel Hydraulic Impingement Damping Valve
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Solution Overview
Problem
Dynamic pressure force differences between incident flow directions complicate the configuration of return springs in damping valve devices for motorcycles, making it difficult to achieve a required damping force characteristic.
Innovation Solution
The front and rear sides of the sliding sleeve are hydraulically impinged in parallel by the damping medium, with a return spring arranged outside to prevent influencing the flow path and a pressure compensation space maintaining equilibrium, minimizing dynamic pressure forces and ensuring uniform operating behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the front side and rear side of the sliding sleeve are impinged hydraulically in series by damping medium, then the conventional valve structure is simple, but substantial dynamic pressure force differences occur between incident flow directions
Solution Approach 1:
The valve structure is segmented into distinct functional zones: a first working chamber receiving incident flow and a second working chamber discharging damping medium. The sliding sleeve is divided into a front side and rear side that are hydraulically impinged in parallel rather than in series, creating separate pressure zones that compensate for dynamic pressure forces.
Solution Approach 2:
The patent creates hydraulic equipotentiality by impinging both the front side and rear side of the sliding sleeve with damping medium in parallel. This ensures that pressure forces act equally on both sides, compensating for dynamic pressure differences and achieving uniform operating behavior regardless of incident flow direction.
2Device complexity
If the return spring is arranged inside the sliding sleeve, then the sliding sleeve structure is simple, but the return spring influences the flow path and dynamic pressure ratios
Solution Approach 1:
The return spring is extracted from the sliding sleeve structure and relocated to the actuator housing. This removes the spring from the flow path, preventing it from influencing dynamic pressure ratios. The spring now engages outside the front side and rear side of the sliding sleeve, eliminating interference with the hydraulic flow while maintaining the restoring force function.
Solution Approach 2:
The patent introduces an intermediary arrangement where the return spring acts on the armature rather than directly on the sliding sleeve. The armature serves as a mediator, transmitting the spring force to the sliding sleeve without the spring being in the direct flow path, thus separating the mechanical restoring function from the hydraulic flow path.
3Reliability
If additional separate seals are used to minimize leaks, then sealing reliability is improved, but the device complexity increases
Solution Approach 1:
The sealing function is merged into the valve carrier structure itself. The valve carrier includes sealing surfaces and integrated seal elements that eliminate the need for additional separate seals. The damping valve carrier is designed with built-in sealing capability, combining the valve body and sealing functions into a single component.
Solution Approach 2:
The valve carrier is designed as a multi-functional component that simultaneously serves as the valve body, mounting structure, and sealing element. This universal design eliminates the need for separate seal components, reducing part count while maintaining sealing reliability through integrated sealing surfaces and features.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration results in a damping valve device with minimized dynamic pressure forces, allowing for easy control of sliding sleeve behavior and reduced turbulence, maintaining reproducible damping behavior and eliminating the need for additional seals.
Implementation Method 1
the front side of the slide sleeve and rear side of the slide sleeve are impinged hydraulically in parallel by damping medium during an incident flow
Implementation Method 2
dynamic pressure forces are extensively compensated at the slide sleeve... the sliding sleeve exhibits a uniform operating behavior
Implementation Method 3
a return spring which orientates the sliding sleeve in an initial position engages outside of the front side and rear side
Implementation Method 4
the valve carrier has a central channel to which at least one diagonally extending transfer channel is connected. Turbulence in the slide valve is minimized in this way
Data Source
AI summary
A damping valve device includes an actuator which carries out an axial displacing movement on a sliding sleeve. The sliding sleeve, along with a fixed valve carrier, forms a slide valve which has two flow directions. The slide sleeve is impinged with damping medium on a front side and on a rear side in an incident flow direction, and the front side of the slide sleeve and rear side of the slide sleeve are impinged hydraulically in parallel by damping medium during the incident flow.