Slave Cylinder Integrating Damping Element for Pressure Pulsations
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Solution Overview
Problem
Conventional hydraulic clutch actuators for motor vehicles experience vibration transmission issues due to pressure pulsations, which are not adequately addressed by existing vibration damping solutions that often require additional space and increase the risk of leaks, are complex, or increase system hysteresis.
Innovation Solution
A slave cylinder with an insert part equipped with a device for reducing pressure pulsations integrated into the pressure chamber, which is always open to the pressure medium, eliminating the need for additional vibration damping assemblies and reducing the axial length, thereby minimizing space requirements and the risk of leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If separate vibration damping assemblies are used in the hydraulic line, then pressure pulsations are dampened, but the risk of leaks increases due to additional connection points
Solution Approach 1:
The vibration damping function is merged with the slave cylinder body by integrating a damping element (elastomeric material or spring) directly into the slave cylinder housing. This eliminates the need for separate vibration damping assemblies and their associated connection points, thereby reducing leak risks while maintaining pressure pulsation damping capability.
2Object-affected harmful factors
If separate vibration damping assemblies are used in the hydraulic line, then pressure pulsations are dampened, but the device complexity increases
Solution Approach 1:
The vibration damping function is integrated into the slave cylinder housing through a damping element, combining multiple functions (cylinder operation and vibration damping) into a single component. This reduces the overall device complexity by eliminating separate vibration damping assemblies from the hydraulic line.
Solution Approach 2:
The slave cylinder housing is designed to serve multiple functions: it contains the piston and pressure medium while also incorporating a damping element to reduce pressure pulsations. This multi-functionality reduces the need for additional specialized components, simplifying the overall system.
3Object-affected harmful factors
If vibration damping assemblies are added to the hydraulic line, then pressure pulsations are dampened, but the space requirements increase
Solution Approach 1:
The vibration damping function is integrated into the existing slave cylinder housing, utilizing the available space within the cylinder body. This eliminates the need for additional space in the hydraulic line for separate vibration damping assemblies, thereby reducing overall space requirements.
4Length of moving object
If the slave cylinder axial length is reduced to save space, then installation space is minimized, but vibration damping capability may be compromised
Solution Approach 1:
The damping element (elastomeric material or spring) is nested within the slave cylinder housing, utilizing the internal volume of the existing structure. This allows vibration damping functionality to be incorporated without increasing the external axial length of the slave cylinder, maintaining compact dimensions while preserving damping capability.
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 solution effectively dampens pressure pulsations within the slave cylinder, reducing the need for additional pipe sections and enhancing the robustness and cost-effectiveness of the hydraulic clutch actuation system while maintaining efficient vibration damping.
Implementation Method 1
The damping element (500) is made of an elastomeric material and is designed to reduce pressure pulsations
Implementation Method 2
a damping element (500) made of an elastomeric material and designed to reduce pressure pulsations
Implementation Method 3
a spring (501) whose damping characteristics are matched to the natural frequency of the liquid column
Implementation Method 4
designed to reduce pressure pulsations... whose damping characteristics are matched to the natural frequency
Data Source
Figure 1
Figure 2~5
Figure 6~9
AI summary
A slave cylinder (50) for a vibration-damped hydraulic power transmission system, in particular a hydraulic clutch actuation for motor vehicles, is disclosed, comprising a cylinder housing (52), a piston (56) longitudinally displaceable therein, and a pressure chamber (60) bounded by the cylinder housing and the piston and optionally pressurized with a pressure medium via a pressure port (66) provided in the cylinder housing to displace the piston in the cylinder housing. Furthermore, an insert (68) is provided in the pressure chamber and fastened in the pressure port, which is equipped with a device (70) that is always open to the pressure medium for reducing pressure pulsations. As a result, the vibration-damping measures or means are integrated into the slave cylinder in a very cost-effective and space-saving manner.