Hydraulic Clutch Pressure Wave Damper With Sinuous Flow Path
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Solution Overview
Problem
Conventional hydraulic clutch actuation systems in motor vehicles experience unpleasant vibrations due to pressure pulsations transmitted through the pressurized duct, causing discomfort to the driver, and existing dampers do not provide sufficient damping capacity or reliability over time.
Innovation Solution
A pressure wave damper with a sinuous fluid path and a resilient vessel containing an elastically expandable hydraulic pressure chamber, featuring a resilient wall and air chamber, which absorbs and dissipates pressure waves through a series of channels and air vents, ensuring effective damping of vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional vibration damper with a cylindrical cavity and sleeve membrane is used, then the damper can be manufactured with simple structure, but the damping capacity is insufficient to effectively reduce pressure wave vibrations
Solution Approach 1:
The single cylindrical cavity is segmented into multiple cavities (first cavity, second cavity, third cavity) with different geometries and functions. Each cavity handles specific frequency ranges or directional components of vibrations, allowing the damper to process complex vibration patterns more effectively while maintaining manufacturing feasibility through modular design
Solution Approach 2:
The invention transitions from a simple cylindrical geometry to multi-dimensional cavity structures including conical sections, annular regions, and three-dimensional flow paths. This dimensional complexity enables the damper to address vibrations from multiple directions and frequencies simultaneously, significantly improving damping capacity
2Device complexity
If existing damper designs are used, then the device complexity remains low, but the damping effectiveness and reliability over time are insufficient
Solution Approach 1:
The damper is divided into functionally distinct segments (different cavities with specific geometries) that can be independently optimized for particular vibration modes. This segmentation allows each section to contribute specifically to overall damping performance, improving reliability through specialized function distribution
Solution Approach 2:
The invention employs varying geometric parameters across different cavities (conical angles, annular dimensions, flow path lengths) to optimize damping characteristics for different frequency ranges. These parameter variations enable the damper to maintain effective damping across diverse operating conditions and time periods
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
The damper effectively reduces pressure wave vibrations, maintaining minimal intensity at the clutch pedal, ensuring a comfortable driving experience and reliable performance over time.
Implementation Method 1
a resilient wall, which is presented by a resilient vessel, preferably in the form of a sleeve, contained within the hydraulic pressure chamber
Implementation Method 2
The resilient vessel forms inside an elastically compressible air chamber
Implementation Method 3
defines a sinuous path for the fluid and includes, along this path, a hydraulic pressure chamber
Data Source
AI summary
A pressure wave damper in a hydraulic system for actuating a friction clutch of a motor vehicle, which defines a sinuous path for a fluid of the hydraulic system is provided. The pressure wave damper, along the sinuous path, has a hydraulic pressure chamber elastically expandable by the fluid. The hydraulic pressure chamber is partially delimited by a resilient wall that is presented by a resilient vessel inside the hydraulic pressure chamber. An elastically compressible air chamber is formed inside the resilient vessel. One or more air channels place the air chamber in communication with air vent openings.