Vehicle Exhaust Bracket With Elastomeric Mount For Vibration Isolation
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Solution Overview
Problem
Conventional vehicles with movable utility beds, such as dump beds, face challenges in efficiently managing vibrations and noise generated by the engine and exhaust system, which can compromise the structural integrity and comfort during cargo hauling and dumping operations.
Innovation Solution
The vehicle design incorporates a sub-frame with a hollow collar and elastomeric mount devices that allow movement in three orthogonal directions, coupled with an exhaust system featuring a conduit bracket and muffler, to attenuate vibrations and noise by allowing relative movement between the engine and frame, and the exhaust system components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the engine and exhaust system are rigidly attached to the frame, then structural stability is improved, but vibrations and noise increase
Solution Approach 1:
The vehicle frame is divided into a main frame and a sub-frame, with the engine and exhaust system mounted on the sub-frame. This segmentation allows the sub-frame to move independently relative to the main frame, isolating vibrations and noise generated by the engine and exhaust system from the main frame while maintaining overall structural stability.
Solution Approach 2:
The sub-frame acts as an intermediary between the main frame and the engine/exhaust system. It provides a mounting platform that can move relative to the main frame, thereby mediating the transmission of vibrations and noise while preserving structural connectivity and stability.
2Strength
If the sub-frame is rigidly connected to the main frame, then structural integrity is improved, but vibration attenuation is reduced
Solution Approach 1:
The connection between the sub-frame and main frame is designed to be dynamic rather than rigid, allowing the sub-frame to move in three mutually orthogonal directions relative to the main frame. This dynamic connection enables vibration attenuation while maintaining structural integrity through controlled movement rather than rigid constraint.
3Stability of the object's composition
If the exhaust system is fixed to the sub-frame, then positioning stability is improved, but movement flexibility is reduced
Solution Approach 1:
The exhaust system is fixed to the sub-frame at specific locations (upstream end to exhaust port, downstream end to muffler, intermediate point to conduit bracket) rather than along its entire length. This localized fixing provides positioning stability at critical points while allowing the exhaust system to move flexibly as a whole with the sub-frame.
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 solution enhances the structural integrity and riding comfort by reducing vibrations and noise, improving the operational efficiency of the utility bed during hauling and dumping operations.
Implementation Method 1
The sub-frame includes an elastomeric mount device, wherein the elastomeric mount device allows movement of the sub-frame relative to the main frame in three mutually orthogonal directions
Data Source
AI summary
A vehicle includes a frame, an engine, and an exhaust system. The frame includes a main frame and a sub-frame movably attached to the main frame. The sub-frame includes an exhaust bracket that includes a hollow collar. The engine includes an engine casing and an exhaust port. The engine is releasably attached to the sub-frame. The exhaust system includes a conduit, a conduit bracket, and a muffler. The conduit includes an upstream end and a downstream end. The upstream end is connected to the exhaust port. The conduit bracket includes a first end and a second end. The first end is attached to the conduit at a location intermediate the upstream end of the conduit and the downstream end of the conduit. The second end of the conduit bracket is movably attached to the hollow collar. The muffler is attached to the downstream end of the conduit.