Adaptive Hydraulic Mount Bypass and Decoupling Membrane Blocking
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Solution Overview
Problem
Existing hydraulic mounts with controllable bypasses face issues where pressure surges can unintentionally open the bypass, and the decoupling membrane's effectiveness is compromised when the bypass is open, affecting the vibrational behavior and increasing frictional forces.
Innovation Solution
The decoupling membrane is designed as a rigid plate mounted to vibrate against the throttle plate, with blocking elements and springs that allow it to be blocked when the bypass is open, and a stepping motor drive that maintains position without additional components, reducing friction and protecting against moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the decoupling membrane is designed to vibrate against the throttle plate, then higher-frequency vibrations are isolated, but when the bypass is open the membrane's effectiveness is compromised and frictional forces increase
Solution Approach 1:
The closure device is designed to block the decoupling membrane against the throttle plate in advance before the bypass opens, preventing the membrane from vibrating when the bypass is open and thus avoiding increased frictional forces and compromised effectiveness
Solution Approach 2:
The blocking elements and springs create a counter-action force that opposes the opening direction of the closure device, preventing unintended opening by pressure surges and maintaining the membrane in a blocked position to preserve vibrational isolation effectiveness
2Adaptability or versatility
If a slide is used to open the bypass and clamp the decoupling membrane, then both functions are achieved, but the slide acts transversely to the direction of effect of the mount and causes additional effort in terms of reducing frictional forces and compensating for fluid displacement
Solution Approach 1:
The closure device is segmented into a closure part for bypass control and blocking elements for membrane clamping, allowing both functions to be achieved with axial movement rather than transverse slide movement, thus reducing frictional forces and fluid displacement effort
Solution Approach 2:
Instead of using a transverse slide to achieve both bypass opening and membrane clamping, the invention uses axial movement of the closure device with blocking elements that engage the membrane, inverting the conventional approach to reduce operational complexity and friction
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 allows for efficient blocking of the decoupling membrane when the bypass is open, minimizing frictional forces and maintaining position without additional components, while protecting against moisture, thereby improving vibrational behavior and reliability.
Implementation Method 1
the working chamber and the equalizing chamber have volumes that change in an interacting manner by elastic deformation of at least one elastomer body
Implementation Method 2
the throttle plate has a damping channel, by way of which the working chamber is fluid-conducting communication with the equalizing chamber
Implementation Method 3
the bypass can be opened and closed by a closure device having a closure part and a drive, the closure device being movable parallel to the axis of the bypass and the opening direction of the closure device being opposite to the main direction of effect of the pressure in the working chamber
Data Source
AI summary
A hydraulic mount includes a closable bypass and a decoupling membrane. When the bypass is opened, however, the main effect that can be achieved by opening the bypass, namely the decrease in the spring rate at higher frequencies, is worsened. It is thus desirable to render the decoupling membrane ineffective when the bypass is open. The aim is achieved in that the closure device of the bypass includes blocking elements for blocking the decoupling membrane in the first switching position of the closure device when the bypass is open and can be released in the second position of the closure device when the bypass is closed.