Exhaust Heat Recovery Resin Hose Connection Positioning
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Solution Overview
Problem
Existing exhaust heat recovery device structures using resin hoses connected to metal pipes are prone to heat damage due to high-temperature gas flow, which can lead to degradation and potential failure.
Innovation Solution
The exhaust heat recovery device structure positions the connected portion of the metal pipe and resin hose further toward the vehicle lower side than the exhaust heat recovery device main body, allowing for effective cooling by wind and reducing the risk of heat damage, while also inclining the connection toward the vehicle front side for improved accessibility and interference prevention on uneven roads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the resin hose is connected to the metal pipe at the upper side of the exhaust heat recovery device main body, then the connection is easier to access during installation, but the resin hose is exposed to high-temperature gas and suffers heat damage
Solution Approach 1:
The patent applies dimensionality change by moving the connection position from the upper side to the lower side of the exhaust heat recovery device main body. This spatial relocation in the vertical dimension allows the resin hose connection to be positioned away from the high-temperature exhaust gas flow path while still maintaining accessibility for installation and maintenance operations.
Solution Approach 2:
The metal pipe serves as an intermediary element between the exhaust heat recovery device main body and the resin hose. By extending the metal pipe downward and providing the connection at its lower end, the hot exhaust gas flows through the metal pipe without directly contacting the resin hose, thus protecting the resin hose from heat damage while maintaining the functional connection.
2Object-affected harmful factors
If the connected portion is positioned further toward the vehicle lower side, then the resin hose is cooled by wind and heat damage is suppressed, but the connection may be more difficult to access
Solution Approach 1:
The patent utilizes vertical dimensionality change to position the connection at the lower side of the main body, where it is exposed to vehicle movement-induced wind flow for cooling. This spatial arrangement allows the connection to benefit from natural convection cooling during vehicle operation while the inclined orientation and metal pipe extension maintain reasonable accessibility for installation and maintenance.
Solution Approach 2:
The patent changes the orientation parameter of the connection by inclining it toward the vehicle front side. This angular adjustment optimizes both the cooling efficiency by exposing the connection to wind flow and the accessibility by creating a more favorable angle for installation and maintenance operations compared to a purely vertical downward connection.
3Reliability
If the connected portion is inclined toward the vehicle front side, then interference with road surfaces is prevented on uneven roads, but the connection geometry becomes more complex
Solution Approach 1:
The patent applies asymmetry by inclining the connection toward the vehicle front side rather than making it purely vertical or horizontal. This asymmetric orientation provides directional stability that prevents the connection from contacting the road surface during vehicle operation on uneven roads, while the inclination angle is optimized to balance protection needs with manufacturing simplicity.
Solution Approach 2:
The inclined connection introduces a directional component in addition to the vertical downward extension, creating a three-dimensional orientation that simultaneously achieves road surface clearance on uneven roads and reasonable accessibility. The metal pipe extension provides the primary structural support while the inclined orientation adds the necessary directional protection.
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
This configuration effectively suppresses heat damage to the resin hose, maintains a stable connection, and facilitates efficient connection and operation of the exhaust heat recovery system, promoting engine warming-up and cooling while minimizing interference with road surfaces.
Implementation Method 1
the connected portion of the metal pipe and the resin hose can be cooled effectively by traveling wind
Implementation Method 2
the exhaust heat recovery device main body carrying out heat exchange between cooling water and gas that is generated at an internal combustion engine
Data Source
AI summary
An exhaust heat recovery device structure that includes: an exhaust heat recovery device main body that is disposed at an inner side of a floor tunnel formed at a vehicle transverse direction central portion of a floor panel, the exhaust heat recovery device main body carrying out heat exchange between cooling water and gas that is generated at an internal combustion engine of a vehicle; and a metal pipe that extends-out from the exhaust heat recovery device main body, the metal pipe being connected to one end of a resin hose whose another end is connected to the internal combustion engine, the connected portion that connects the metal pipe with the resin hose being provided to the metal pipe further toward a vehicle lower side than the exhaust heat recovery device main body, is provided.