Ladderframe Deflection Surface for Engine Oil Seal Leak Protection
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Solution Overview
Problem
Metal-to-metal seals in vehicle engines can leak, causing high-pressure oil to spray and potentially damage adjacent seals, particularly RTV silicone rubber seals, leading to inefficiencies and increased fuel consumption due to oil escaping and not draining back to the sump.
Innovation Solution
A deflection surface is integrated into the engine's ladderframe, diverting high-pressure oil spray from a failed metal-to-metal seal back towards the oil sump, thereby protecting the gasket seal and maintaining engine efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a metal-to-metal seal is used in a high pressure oil conduit, then the seal is more economical and can drain back to the oil sump, but the seal may fail and cause high pressure oil to spray and damage adjacent RTV silicone rubber seals
Solution Approach 1:
A deflection surface is introduced as an intermediary protective feature between the metal-to-metal seal and the RTV silicone rubber seal. This deflection surface intercepts and redirects high-pressure oil spray away from the RTV seal, preventing damage while allowing the metal-to-metal seal to maintain its economical advantages.
Solution Approach 2:
The deflection surface provides beforehand protection by being positioned to intercept high-pressure oil spray before it can reach and damage the RTV silicone rubber seal. This preventive measure cushions the RTV seal against potential harm from seal failures.
2Reliability
If the metal-to-metal seal leaks, then oil sprays from the leak point and can damage adjacent seals, but adding protective features increases device complexity
Solution Approach 1:
The deflection surface is merged with the existing engine structure (ladderframe or oil conduit), combining the protective function with an existing component. This integration approach provides seal protection while minimizing the increase in overall device complexity.
Solution Approach 2:
The deflection surface serves multiple functions: it deflects high-pressure oil spray away from RTV seals, redirects oil flow toward the oil sump, and can be integrated into existing structural components. This multi-functionality provides comprehensive protection without requiring multiple separate protective devices.
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 deflection surface effectively redirects leaking oil away from critical seals, preventing damage and ensuring efficient oil containment, thus minimizing fuel consumption and maintaining engine performance.
Implementation Method 1
A deflection surface is integrated into the engine's ladderframe, diverting high-pressure oil spray from a failed metal-to-metal seal back towards the oil sump
Data Source
Figure 1~2
Figure 3~4
AI summary
A ladderframe (10) is provided. The ladderframe is configured to provide a deflection surface (15). The deflection surface is positioned to guide high pressure oil away from adjacent RTV seals.