Muffler Internally Supported Tuner Straight Pipe
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Solution Overview
Problem
Mufflers face challenges in fitting within limited vehicle spaces while maintaining performance and tunability due to the need for zones without perforations to bend pipes, which limits tuning opportunities and increases noise reduction complexity.
Innovation Solution
A muffler design featuring a casing with end caps and a pipe where circumferentially extending flanges provide support, allowing for a straight pipe with apertures along its length, and an internal baffle to create chambers for enhanced sound absorption, enabling improved packaging and tunability without the need for pipe bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If pipe bending is used to position inlet and outlet, then packaging space is reduced, but pipe length for perforations is reduced and tunability is limited
Solution Approach 1:
The end caps are segmented into multiple functional zones: a first zone with a circumferentially extending flange for pipe support, a second zone with a tuning chamber for acoustic tuning, and a third zone with an opening for exhaust flow. This segmentation allows each zone to perform its specific function independently, enabling straight pipe configuration while maintaining tunability and compact packaging.
Solution Approach 2:
The invention transitions from traditional linear pipe routing to a three-dimensional arrangement where the pipe passes through multiple zones of the end cap in different spatial dimensions. The pipe extends through the first zone, with tuning chambers extending radially in the second zone, and outlets in the third zone, allowing compact packaging without pipe bending.
2Volume of moving object
If pipe bending is used to position inlet and outlet, then packaging space is reduced, but pipe length available for perforations is reduced
Solution Approach 1:
The end cap is divided into distinct functional zones that allow the pipe to maintain its straight configuration while still achieving compact packaging. The first zone provides support flanges, the second zone contains tuning chambers, and the third zone has outlets, eliminating the need for pipe bending and preserving maximum pipe length for perforations.
3Object-affected harmful factors
If traditional muffler design with pipe bending is used, then noise reduction is achieved, but device complexity increases due to bending operations
Solution Approach 1:
Instead of bending the pipe to achieve the desired inlet and outlet positioning, the invention inverts the approach by designing the end cap with multiple zones that accommodate a straight pipe. The circumferentially extending flange in the first zone supports the pipe, while tuning chambers and outlets in subsequent zones achieve the required flow paths without pipe deformation.
Solution Approach 2:
The end cap is segmented into multiple functional zones that handle different aspects of exhaust flow management separately. This segmentation eliminates the need for complex pipe bending operations while maintaining effective noise reduction through properly positioned perforations and tuning chambers.
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 design allows for efficient noise reduction and enhanced tunability within compact spaces by supporting the pipe with flanges and using apertures for better acoustic dampening, addressing the limitations of traditional muffler designs.
Implementation Method 1
apertures formed in substantially an entire length of the first section
Implementation Method 2
a baffle disposed within the shell and cooperating with the shell to define first and second chambers
Data Source
AI summary
A muffler for receiving exhaust gas from a combustion engine is disclosed. The muffler includes a casing and a pipe. The casing includes a shell coupled to first and second end caps that cooperate to define an internal volume. The pipe is disposed within the internal volume and extends substantially a length of the shell. Each of the first and second end caps includes a circumferentially extending flange engaging an outer surface of the pipe to provide support for the pipe. Each circumferentially extending flange extends at an acute angle relative to a shell axis of the shell. Each circumferentially extending flange is coaxial along a pipe axis of the pipe.