Exhaust Bracket Reinforcement for Stiffness and Noise Reduction
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Solution Overview
Problem
The existing exhaust device supporting components face issues with low stiffness at the joining portions, leading to potential damage and vibration during vehicle travel, especially as the length of the supporting rods increases, which can cause noise due to resonance.
Innovation Solution
The exhaust device incorporates a supporting component with a rod and bracket configuration that includes a reinforcing portion on the intermediate surface between the joining surfaces of the exhaust component, enhancing stiffness and reducing resonance, allowing for improved stress distribution and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the length of the rod is increased to support the exhaust component, then the support span is improved, but the joining portion has increased stress and decreased resonance frequency causing damage and vibration
Solution Approach 1:
The patent applies local quality by providing a reinforcing portion specifically at the intermediate surface of the joining target portion, rather than uniformly strengthening the entire structure. This localized reinforcement increases stiffness where needed to reduce stress concentration at the joining portion, while maintaining the required rod length for support span. The reinforcing portion creates a stiffer path for stress distribution, preventing damage and vibration at the joining portion even with increased rod length.
2Length of moving object
If the length of the rod is increased to support the exhaust component, then the support span is improved, but the resonance frequency decreases causing noise during vehicle travel
Solution Approach 1:
The reinforcing portion is strategically placed at the intermediate surface to locally increase stiffness without changing the overall rod length. This localized stiffness increase raises the resonance frequency of the supporting component, reducing noise during vehicle travel while maintaining the necessary support span provided by the rod length.
3Strength
If the stiffness of the joining target portion is increased to reduce stress concentration, then the resistance to damage and vibration is improved, but the device complexity increases
Solution Approach 1:
The patent implements local quality by adding only a reinforcing portion at the intermediate surface, rather than redesigning the entire joining target portion. This minimal structural addition provides the necessary stiffness increase to reduce stress concentration and prevent damage, while keeping the overall device complexity low. The reinforcing portion can be integrated into the existing exhaust component structure with minimal additional manufacturing steps.
Data Source
AI summary
An exhaust device includes a supporting component and an exhaust component. The supporting component is configured to support the exhaust component. The supporting component includes a rod and a bracket. The bracket is supported from above by the rod. The exhaust component includes a joining target portion. The joining target portion includes a first joining surface and a second joining surface, to which the bracket is joined. An intermediate surface, which is between the first joining surface and the second joining surface, is provided with a reinforcing portion that reinforces the intermediate surface.