Fuel Injector Combustion Seal Retention With Integrated Heat Shield
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Solution Overview
Problem
Internal combustion engines face challenges in maintaining combustion seals to prevent gas leakage and protecting fuel injectors from excessive heat, as existing solutions often require additional components for retention and do not effectively manage thermal stress.
Innovation Solution
A combustion seal assembly comprising a seal member and a heat shield member, formed of different materials, that incorporates a holding device to secure the seal in place without additional components, providing a metal-to-metal seal and thermal conductivity to manage heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional components are used to retain the seal member in place, then the seal reliability is improved, but the device complexity increases
Solution Approach 1:
The holding device is integrated into the seal member as a single unified component. The seal member incorporates protrusions that directly engage with corresponding features on the fuel injector body, eliminating the need for separate retention components while maintaining secure positioning and sealing functionality.
2Strength
If the seal member is retained with additional components, then the structural integrity is improved, but the manufacturing complexity increases
Solution Approach 1:
The holding device features are formed as integral parts of the seal member during the molding process. The protrusions and engagement features are created in a single manufacturing step, reducing assembly operations and simplifying production while ensuring robust structural integrity through direct metal-to-metal contact.
3Device complexity
If the seal member incorporates a holding device, then the device complexity is reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The holding device utilizes localized protrusions with specific geometric features designed to engage with corresponding recesses on the fuel injector body. These localized engagement features require precise dimensional control only at specific critical interfaces, rather than throughout the entire seal member, thereby balancing manufacturing precision requirements with simplified overall device structure.
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 assembly effectively seals combustion gases and protects fuel injectors by maintaining structural integrity and thermal management, ensuring reliable operation and durability.
Implementation Method 1
protecting fuel injectors from excessive heat by removing heat via the combustion seal
Data Source
AI summary
A combustion seal assembly includes a seal member with a first section and a second section, and a heat shield member, wherein the seal member and the heat shield member are configured to form a combustion seal, and wherein the first section or the second section of the seal member incorporates a holding device to retain the seal member in place with the heat shield member.