Exhaust Muffler Support Layout for Vibration Isolation and Lateral Response
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Solution Overview
Problem
Existing exhaust muffler supporting structures face challenges in reducing vibration due to inertial forces without limiting the degree of freedom in muffler layout and vehicle design, as low spring constants lead to excessive swinging and delayed responsiveness during lateral movements.
Innovation Solution
The proposed exhaust muffler supporting structure employs left and right cushion members with specific hook holes and elastic axes aligned with the gravity center of the exhaust system, allowing for balanced support and reduced rotational vibration without limiting design flexibility, by adjusting the spring constants and inclination of the cushion members to optimize the elastic main axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the spring constant of the cushion member is set to be low to reduce vibration transmission to the vehicle body, then the exhaust system can be more flexible and reduce vibration, but the exhaust system tends to be greatly swung outward during lateral movement and follow-up responsiveness deteriorates
Solution Approach 1:
The supporting structure is divided into multiple cushion members (first and second cushion members) positioned at different locations. Each cushion member has its own spring constant characteristics, allowing the system to segment the vibration isolation function while maintaining overall stability during lateral movement.
Solution Approach 2:
The patent optimizes the spring constants of the cushion members by positioning them at specific locations relative to the exhaust system's gravity center. The first cushion member has a different spring constant than the second, creating a balanced system that reduces vibration transmission while maintaining responsiveness during lateral acceleration.
2Stability of the object's composition
If the spring constant is set to be low to increase flexibility of the exhaust system, then vibration transmission is reduced, but the exhaust system receives inertial force and is greatly swung outward during lateral movement
Solution Approach 1:
The patent positions the cushion members asymmetrically relative to the exhaust system's gravity center to create a counterbalancing effect. The first cushion member is positioned at a greater distance from the gravity center than the second cushion member, creating a moment balance that counteracts inertial forces during lateral movement while maintaining system flexibility.
3Object-affected harmful factors
If cushion members are positioned to reduce vibration, then vibration isolation is improved, but the degree of freedom in muffler layout and vehicle design is limited
Solution Approach 1:
The patent applies different spring constant characteristics to different cushion members based on their local positions relative to the exhaust system's gravity center. The first cushion member has a different spring constant than the second, allowing each location to be optimized for its specific mechanical environment while maintaining overall vibration isolation performance and design flexibility.
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 approach effectively reduces inertial-induced vibrations and improves follow-up responsiveness during lateral acceleration, enhancing vehicle behavior and allowing for more flexible muffler layout and vehicle design without compromising vibration isolation.
Implementation Method 1
a cushion member, and a gravity center position of the exhaust system body, wherein an elastic main axis obtained based on a characteristic of the left cushion member and a characteristic of the right cushion member is set on the gravity center position
Implementation Method 2
In order to efficiently block the vibration transmission to the vehicle body, it is advantageous to set a spring constant of the cushion member to be low (to increase the flexibility)
Data Source
AI summary
An exhaust muffler supporting structure includes left and right vehicle body-side hangers, left and right muffler-side hangers, suspending hooks, suspended hooks, and left and right cushion members. The vehicle body-side hangers extend from a bottom of a vehicle body. The muffler-side hangers are fixed to an exhaust system body. The suspending hooks are disposed respectively on the vehicle body-side hangers. The suspended hooks are disposed respectively on the muffler-side hangers. The cushion members each have first and second hook holes into which a corresponding one of the suspending hooks and a corresponding one of the suspended hooks are inserted respectively. The first and second hook holes are disposed on respective sides of each of the cushion members in a main axis direction. An elastic main axis obtained based on characteristics of the cushion members is set on a gravity center position of the exhaust system body.