Integrated Membrane Diaphragm Engine Mount
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Solution Overview
Problem
Existing engine mounts with separate membranes and diaphragms increase manufacturing costs and weight due to additional components and labor, while also requiring external drivers to switch dynamic characteristics based on traveling conditions.
Innovation Solution
An engine mount design where a membrane and diaphragm are integrally formed, allowing for self-switchable dynamic characteristics through a core bush, main rubber, orifice body, upper and lower fluid chambers, and a solenoid valve, reducing the number of components and enabling adjustable damping based on vehicle conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate membrane and diaphragm are used in the engine mount, then the isolation of fluid chambers is improved, but the manufacturing cost and weight increase
Solution Approach 1:
The patent combines the membrane and diaphragm into a single integrated component made of elastic material. This unified structure performs both functions: isolating the upper and lower fluid chambers (membrane function) and defining the lower fluid chamber (diaphragm function), thereby reducing the number of parts while maintaining reliability
Solution Approach 2:
The integrated elastic component serves multiple functions simultaneously: it acts as both the membrane that separates fluid chambers and the diaphragm that defines the lower chamber volume. This multi-functionality reduces component count and simplifies the overall structure
2Reliability
If a separate membrane and diaphragm are used in the engine mount, then the fluid chamber isolation is improved, but the manufacturing labor and assembly time increase
Solution Approach 1:
By merging the membrane and diaphragm into one integrated elastic component, the assembly process is simplified. Instead of installing two separate parts, the single unified component is installed as one piece, reducing assembly steps and labor time while maintaining the fluid chamber seal integrity
3Adaptability or versatility
If a negative-pressure driver or electronic driver is added to switch dynamic characteristics, then the adaptability to traveling conditions is improved, but the weight and manufacturing cost increase
Solution Approach 1:
The engine mount uses the powertrain's own vibration and motion to automatically switch between different dynamic characteristics. During idling, the mount provides high damping; during traveling, it transitions to lower damping. This self-switching mechanism eliminates the need for external negative-pressure drivers or electronic drivers, reducing weight and cost
Solution Approach 2:
The mount dynamically adapts its characteristics based on operating conditions through its integrated elastic structure and fluid chamber design. The system transitions between different damping states (high damping for idling, low damping for traveling) based on the natural motion of the powertrain, providing adaptability without additional active control components
4Adaptability or versatility
If a negative-pressure driver or electronic driver is added to switch dynamic characteristics, then the control of powertrain behavior is improved, but the manufacturing cost increases
Solution Approach 1:
The mount automatically switches dynamic characteristics using the powertrain's own operational conditions without requiring external control systems. The integrated elastic component and fluid chamber design enable self-regulation between high-damping (idling) and low-damping (traveling) states, eliminating the need for expensive negative-pressure drivers or electronic control components
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 design reduces manufacturing costs and weight, enhances damping functionality, and allows for tunable dynamic characteristics suitable for both idling and traveling conditions, improving vibration isolation and control of the powertrain.
Implementation Method 1
a membrane part (62) disposed under the center region of the upper plate (50) to be displaced vertically
Implementation Method 2
a main rubber (20) formed on an outer surface of the core bush (10)
Implementation Method 3
an orifice body (40) mounted on an inner surface of the outer pipe (22) and having a main flow path (42) for communication of fluid between an upper fluid chamber and a lower fluid chamber
Data Source
AI summary
An engine mount for a vehicle is provided to include a core bush coupled to a vehicle body, a main rubber formed on the core bush, and an outer pipe that is attached to the main rubber and extends downwards. An orifice body is mounted in the outer pipe and has a main flow path and an upper plate is coupled to the orifice body. The upper plate has a fluid passage aperture to communicate with the main flow path and has a plurality of fluid action apertures. An integral plate includes a membrane part disposed under the upper plate and a diaphragm part coupled to an edge of a lower surface of the orifice body under the orifice body. A lower cover body includes a membrane support plate that has an air aperture and is disposed under the membrane part and a cover supporting the diaphragm part.