Exhaust Hanger Bracket with Non-Circular Cross Section
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Solution Overview
Problem
Existing exhaust hangers suffer from poor noise, vibration, and harshness (NVH) performance, particularly with longer perches, and require multiple designs to meet high frequency targets, increasing cost and complexity.
Innovation Solution
An exhaust hanger assembly featuring a bracket with non-circular cross-section receivers and a clip with opposing apertures, where a rod is fixed to the vehicle body and extends through the receivers, providing a two-point support for improved NVH refinement and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If exhaust hangers include longer perches to extend from the flexible isolator, then the exhaust system can be fixed to the vehicle body, but the noise, vibration and harshness (NVH) performance deteriorates
Solution Approach 1:
The hanger assembly is divided into distinct functional segments: a flexible isolator portion for vibration isolation, a bracket portion for structural support, and a rod portion for positioning. This segmentation allows each component to be optimized for its specific function, with the bracket providing rigid support to minimize NVH issues that would otherwise require longer perches.
Solution Approach 2:
The bracket acts as an intermediary component between the flexible isolator and the rod, providing a rigid structural connection that eliminates the need for long perches. The bracket's rigid structure serves as a mediator that maintains positional stability without transmitting vibration, resolving the conflict between installation ease and NVH performance.
2Object-affected harmful factors
If multiple exhaust hanger designs are used to meet high frequency targets, then NVH refinement improves, but cost and complexity increase
Solution Approach 1:
The bracket design serves multiple functions simultaneously: it provides rigid structural support, acts as a mounting point for the flexible isolator, and positions the rod at optimal locations. This multi-functionality allows a single standardized design to achieve high frequency targets across different applications, eliminating the need for multiple specialized designs.
Solution Approach 2:
The invention achieves NVH refinement by optimizing parameters within a standardized design framework, such as the dimensions and positioning of receivers, rather than creating multiple distinct designs. This approach maintains simplicity while meeting high frequency targets through careful parameter selection.
3Reliability
If rod and bracket hangers are used to meet high frequency targets, then first mode frequency increases, but manufacturing cost and complexity increase due to unique designs required for each location
Solution Approach 1:
The bracket design is created as a universal component that can be used across multiple vehicle locations and applications. By designing the bracket to serve multiple functions and locations, the invention achieves high first mode frequency without requiring unique custom designs for each application, thereby reducing manufacturing cost and complexity.
Data Source
AI summary
An exhaust hanger assembly for a vehicle includes a bracket, a clip, and a rod. The bracket includes a peripheral wall having a non-circular cross section. The bracket includes a first end configured to be fixed to an exhaust pipe of the vehicle and a second end including first and second receivers formed in peripheral wall. The clip is disposed around at least a portion of an outer surface of the bracket and fixed to the bracket. The clip includes opposing apertures. The rod, which is configured to be fixed to a body of the vehicle, extends through the opposing apertures of the clip and is fixed to the clip. The rod is disposed within the first and second receivers of the bracket.