Dynamically Adjustable Body Mounts for Vehicle Vibration Isolation
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Solution Overview
Problem
Existing vehicle body mounts face challenges in balancing ride and handling characteristics with noise and vibration isolation, as they must trade off between stiff rubber compounds for improved handling and softer compounds for better isolation.
Innovation Solution
A dynamically adjustable body mount system that detects vehicle and road conditions to adjust stiffness and damping parameters, using sensors and a control system to actively isolate the vehicle body from vibrations and noise, allowing for real-time optimization of ride quality and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If stiff rubber compounds are used in body mounts, then ride and handling characteristics improve, but noise and vibration isolation deteriorates
Solution Approach 1:
The body mount incorporates an adjustable damping mechanism that allows the damping coefficient to be varied in real-time based on driving conditions. This dynamic adjustment capability enables the mount to switch between stiff (for handling) and soft (for isolation) characteristics, resolving the contradiction between ride/handling stability and noise/vibration isolation.
Solution Approach 2:
The invention changes the physical parameter of the rubber compound by introducing an adjustable damping element that modifies the effective stiffness and damping characteristics of the body mount. This allows the same physical structure to exhibit different mechanical properties (soft vs. stiff) depending on the required function, thereby addressing the contradiction between isolation and handling requirements.
2Object-affected harmful factors
If softer rubber compounds are used in body mounts, then noise and vibration isolation improves, but ride and handling characteristics deteriorate
Solution Approach 1:
The adjustable damping mechanism allows the body mount to dynamically switch between soft and stiff characteristics. When isolation is prioritized, the mount operates in a softer state; when handling is prioritized, it transitions to a stiffer state. This dynamic adaptability resolves the contradiction by allowing the system to optimize for either isolation or handling based on real-time conditions.
Solution Approach 2:
The invention modifies the effective stiffness and damping parameters of the body mount through an adjustable mechanism. By changing these physical parameters dynamically, the system can achieve both soft characteristics (for isolation) and stiff characteristics (for handling) using the same physical structure, thereby resolving the contradiction between isolation performance and handling stability.
3Stability of the object's composition
If body mounts are designed to provide structural feel, then handling improves, but vibration transmission to the body increases
Solution Approach 1:
The adjustable damping mechanism enables the body mount to provide firm structural support when handling and structural feel are prioritized, while simultaneously allowing for vibration isolation when comfort is prioritized. This dynamic switching capability resolves the contradiction by allowing the mount to be stiff for structural feel and soft for vibration isolation at different times.
Solution Approach 2:
The invention changes the damping and stiffness parameters of the body mount to achieve different functional states. By adjusting these parameters, the system can provide firm structural support for handling and structural feel while minimizing vibration transmission, thereby resolving the contradiction between structural feel and vibration isolation.
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 system effectively reduces the transmission of vibrations and noise to the vehicle body while maintaining desired handling characteristics, enhancing both ride comfort and structural feel by dynamically adjusting to various driving conditions.
Implementation Method 1
body mounts to reduce the effects of noise, vibration, and harshness (NVH) transmitted to the vehicle operator and/or passengers
Implementation Method 2
Tradeoffs occur between the use of stiff rubber compounds and increased damping
Data Source
AI summary
A vehicle includes a chassis and a vehicle body supported by the chassis. At least one dynamically adjustable body mount connects the vehicle body to the chassis. The at least one dynamically adjustable body mount includes a selectively adjustable parameter. One or more vehicle sensors is associated with the vehicle. The one or more vehicle sensors is operable to detect one or more vehicle parameters. A control system is operatively connected to the at least one dynamically adjustable body mount and the one or more vehicle sensors. The control system is operable to alter the selectively adjustable parameter of the at least one dynamically adjustable body mount to substantially isolate the body from road and vehicle induced vibration in response to at least one of the one or more vehicle parameters and the one or more road surface parameters.