Switchable Hydraulic Mount Transverse Valve Opening
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Solution Overview
Problem
Conventional switchable hydraulic mounts require high actuation forces for the linear actuator to close or keep closed the decoupling chamber, leading to the use of large and expensive actuators and significant opening and closing noises.
Innovation Solution
A switchable hydraulic mount design featuring a decoupling element and a switchable valve with a valve housing and linear actuator, where the valve opening extends transversely to the movement axis, reducing the actuation force needed and minimizing noise by allowing the actuator to work against lower pressures, enabling the use of smaller, more economical actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the decoupling chamber is closed by means of a linear actuator, then the spring stiffness of the enclosed air volume is high and the decoupling action is reduced, but high actuation forces are necessary to close or keep closed the decoupling chamber against the applied pressures
Solution Approach 1:
The valve opening is designed to extend in a direction transverse to the movement axis of the actuator head, creating a flow path that is perpendicular to the actuator's motion direction. This dimensional change allows the actuator to work against lower pressures while still achieving reliable valve closing, as the air flow oscillates transversely through the opening rather than directly opposing the actuator head.
Solution Approach 2:
The patent changes the geometric parameters of the valve opening, specifically its orientation relative to the actuator movement. By extending the valve opening transversely to the movement axis, the pressure distribution and flow dynamics are altered, reducing the actuation force requirement while maintaining closing reliability.
2Reliability
If the decoupling chamber is closed by means of a linear actuator, then the decoupling action is reduced and the work fluid flows back and forth between chambers, but large and expensive linear actuators are required
Solution Approach 1:
By orienting the valve opening transverse to the actuator movement axis, the system achieves effective decoupling chamber closing with a smaller actuator. The transverse extension of the valve opening creates a flow path that reduces the pressure load on the actuator, enabling the use of more compact and economical actuator designs.
3Force
If the decoupling chamber is closed by means of a linear actuator, then the hydraulic mount exhibits high stiffness and high damping, but significant opening and closing noises are generated
Solution Approach 1:
The transverse orientation of the valve opening relative to the actuator movement axis changes the direction of air flow oscillation. This dimensional change allows the actuator to close the valve against lower pressure differentials, significantly reducing the impact forces and associated noises during opening and closing operations while maintaining the desired high stiffness when closed.
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 design reduces the necessary actuation force and noise associated with closing the valve, allowing for the use of smaller, more economical linear actuators and minimizing vibrations during operation.
Implementation Method 1
the linear actuator comprises an actuator head which can be displaced in the valve housing between a closed position and an open position
Implementation Method 2
the decoupling element is arranged between the first fluid chamber and a decoupling chamber, fluidically separating said chambers from one another
Implementation Method 3
during compression and rebound of the spring body, a damping fluid can flow between the first fluid chamber and the second fluid chamber
Implementation Method 4
a spring body, which partially delimits a first fluid chamber formed therein
Implementation Method 5
during compression and rebound of the spring body
Data Source
AI summary
A switchable hydraulic mount includes a first fluid chamber delimited by a spring body, a second fluid chamber fluidically connected to the first fluid chamber, a decoupling element for decoupling the chambers, and arranged between the first fluid chamber and a decoupling chamber, the chambers being fluidically separated from one another, and a switchable valve to selectively open or close the decoupling chamber with respect to the environment, the switchable valve including a valve housing with a linear actuator including an actuator head displaceable in the valve housing between closed and open positions, the valve housing including at least one valve opening which, in the open position, connects the decoupling chamber to the environment and which, in the closed position, is closed by the actuator head, and the valve opening including at least a component of extension transverse with respect to the movement axis of the actuator head.