Exhaust Purification Bracket Layout for Lightweight Engine Support
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Solution Overview
Problem
The challenge is to suppress the lowering of support strength while reducing the weight of the member that supports the exhaust-gas purification device in an engine, as conventional designs face issues with increased weight due to large support bases or reduced support strength without them.
Innovation Solution
The engine design incorporates a bracket with a first-case mounting portion, a second-case mounting portion, and a coupling portion to mount the exhaust-gas purification device, eliminating the need for a large support base, thereby reducing weight while maintaining support strength through a divided mounting structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a large support base is disposed above the engine main-body to support the exhaust-gas purification device, then the support strength is improved, but the weight of the engine increases
Solution Approach 1:
The bracket is divided into multiple portions: a first-case mounting portion mounted on the first case, a second-case mounting portion mounted on the second case, and a coupling portion coupling these mounting portions. This segmentation allows the exhaust-gas purification device to be supported through distributed mounting points rather than requiring a single large support base, thereby maintaining support strength while reducing overall weight.
2Weight of stationary object
If the support base is eliminated to reduce the weight of the engine, then the weight decreases, but the support strength of the exhaust-gas purification device lowers
Solution Approach 1:
The bracket merges the mounting functions for both the first case and second case into a single integrated component. By combining these mounting functions in one bracket structure with coupling portions, the design eliminates the need for separate support bases while maintaining adequate support strength through the distributed mounting architecture.
3Strength
If a large support base is used to maintain support strength, then the support strength is preserved, but the device complexity increases
Solution Approach 1:
The bracket is segmented into functional portions (first-case mounting portion, second-case mounting portion, and coupling portion) that can be independently designed and manufactured. This segmentation simplifies the overall structure compared to a single large support base, while still providing the necessary support strength through distributed mounting points.
Data Source
AI summary
An exemplary engine includes an engine main-body, an exhaust-gas purification device having a first case and a second case, and a bracket for mounting the exhaust-gas purification device onto the engine main-body. The bracket has a first-case mounting portion mounted on the first case, a second-case mounting portion mounted on the second case, and a coupling portion coupling the first-case mounting portion and the second-case mounting portion.