Inverse-Type Engine Mount With Fluid-Filled Assembly
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Solution Overview
Problem
Existing inverse-type engine mounts for vehicles have limitations in dynamic stiffness due to the form of their support brackets, which require additional weighty mass dampers and complex connecting structures, and cannot be easily tuned or maintained without additional components.
Innovation Solution
An inverse-type engine mount design where a fluid-filled assembly and a rubber assembly are separably coupled, with a support bracket directly integrated with the fluid-filled assembly, featuring a hook cup and locking recess for simplified connection and maintenance, allowing for improved vibration control and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a mass damper is installed on the support bracket to increase dynamic stiffness, then vibration attenuation is improved, but the vehicle weight increases
Solution Approach 1:
The patent replaces the traditional mass damper (mechanical component weighing 2.6 kg) with a fluid-filled assembly that uses hydraulic principles. The fluid assembly includes a piston, cylinder, and damping fluid that provide vibration attenuation through fluid resistance rather than mass inertia, thereby achieving dynamic stiffness without the weight penalty of conventional mass dampers
Solution Approach 2:
The support bracket is equipped with a fluid-filled assembly containing a piston and cylinder mechanism. The damping effect is achieved through the hydraulic fluid's resistance to piston movement, utilizing hydraulic principles to provide vibration control. This hydraulic system replaces the need for heavy mechanical mass dampers while maintaining effective dynamic stiffness
2Device complexity
If the fluid-filled assembly and rubber assembly are formed as a single body, then structural simplicity is achieved, but the engine mount cannot be tuned or maintained
Solution Approach 1:
The engine mount is divided into separable components: the rubber assembly and the fluid-filled assembly. The fluid-filled assembly can be independently removed and replaced from the rubber assembly through the opening in the rubber housing. This segmentation enables individual tuning of the fluid damping characteristics and maintenance of specific components without replacing the entire engine mount assembly
3Adaptability or versatility
If a separate mounting bracket is used to connect the inverse-type engine mount to the engine, then connection flexibility is achieved, but the connecting structure becomes complicated and requires additional components
Solution Approach 1:
The mounting bracket function is merged with the fluid-filled assembly. The support bracket serves dual purposes: it provides the connection interface to the engine and houses the fluid-filled damping assembly. This integration eliminates the need for a separate mounting bracket, simplifying the connecting structure while maintaining the flexibility needed for engine mounting applications
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 simplifies the connection structure between the engine mount and engine, enhances dynamic stiffness, and facilitates easier maintenance by allowing separate tuning of the engine mount components, reducing costs and weight while improving vibration control in multiple directions.
Implementation Method 1
a fluid-filled assembly including a hook cup configured to be inserted into the mounting hole in the support bracket... an inverse-type engine mount is configured such that a fluid-filled assembly is located at the upper side... to attenuate vibration and noise
Implementation Method 2
a rubber assembly configured to be mounted to a vehicle body... in which a support bracket, which is to be connected to an engine, is directly and integrally assembled with the fluid-filled assembly
Data Source
AI summary
An engine mount for a vehicle may include a support bracket including a mounting hole formed in one end portion thereof, an engine-mounting plate provided at an opposite end portion thereof to be connected to an engine, and a coupling portion protruding from an external surface of the one end portion thereof; a fluid-filled assembly including a hook cup configured to be inserted into the mounting hole in the support bracket; and a rubber assembly configured to be mounted to a vehicle body, wherein, in a state in which the fluid-filled assembly is inserted into the mounting hole in the support bracket, the fluid-filled assembly is stacked on a top surface of the rubber assembly, and a housing of the rubber assembly is coupled to the coupling portion of the support bracket.