Integrating Polyurethane Blocking Member with Cylinder Head Cover
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Solution Overview
Problem
Existing gap blocking mechanisms in engine compartments fail to effectively reduce noise generation and provide adequate heat insulation due to vibrations and air flow issues, especially in compact vehicle designs where heat-sensitive components are closely arranged.
Innovation Solution
A gap blocking mechanism that integrates a blocking member with the cylinder head cover, made of polyurethane foam for sound absorption, which is elastically contacted with the engine cover's sound absorbing member, reducing noise and enhancing heat insulation by eliminating air flow through the gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If heat-sensitive components are arranged close to heat sources to save space, then space utilization is improved, but heat insulation performance deteriorates
Solution Approach 1:
The blocking member acts as an intermediary component positioned between the heat source (exhaust manifold) and heat-sensitive components (hoses, harnesses). It fills the gap between the engine cover and cylinder head cover, providing thermal barrier protection without requiring increased spacing between components.
2Object-affected harmful factors
If a heat shield is added to protect components from heat, then heat insulation is improved, but device complexity increases
Solution Approach 1:
The blocking member is integrated with the cylinder head cover as a single unified component. The cylinder head cover serves dual functions: covering the cylinder head and providing heat insulation through the integrated blocking member, eliminating the need for separate heat shield components.
Solution Approach 2:
The cylinder head cover is designed with multi-functionality, simultaneously serving as a protective cover and a heat insulation barrier. The blocking member extends from the cylinder head cover to provide thermal protection, making the single component perform multiple protective functions.
3Object-affected harmful factors
If a blocking member is added to fill the gap, then heat insulation is improved, but manufacturing cost increases
Solution Approach 1:
The blocking member is merged with the cylinder head cover into a single integrated component. This integration allows both parts to be manufactured together as one piece, eliminating the need for separate manufacturing processes and assembly steps, thereby reducing overall manufacturing cost.
Solution Approach 2:
The blocking member is formed from the same material as the cylinder head cover, creating a homogeneous composite structure. This approach simplifies material selection and manufacturing while ensuring consistent thermal insulation properties throughout the integrated component.
4Device complexity
If the blocking member is made integrally with the cylinder head cover, then device complexity is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The blocking member and cylinder head cover are merged into a single integrated component manufactured in one process. This integration eliminates the need for separate manufacturing and assembly operations, reducing device complexity while the single-step manufacturing process naturally ensures consistent precision without requiring additional alignment tolerances between separate parts.
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 reduces noise transmission, improves heat insulation, and simplifies the mounting process while reducing manufacturing costs by integrating the blocking member with the cylinder head cover, eliminating the need for additional components and heat-resistant materials in the engine cover.
Implementation Method 1
The elastic member, which is made of a polyurethane foam, is used as a sound absorbing member for reducing noise emitted from an engine.
Implementation Method 2
The blocking member... is formed integrally with the cover for a cylinder head cover and elastically contacted with an elastic member included in the engine cover using elastic contact force of the elastic member
Implementation Method 3
a gap blocking mechanism that suppresses noise generation and provides excellent heat insulation... The blocking member is provided between the heat source on one side and the member to be protected on the other side
Data Source
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AI summary
A gap blocking mechanism (1) includes: an engine cover (2); a cover (3) for a cylinder head cover that is disposed on a front side of a cylinder head cover (920) disposed at a predetermined distance from a back side of the engine cover (2); and a blocking member (4) that blocks at least a part of a gap between the engine cover (2) and the cover (3) for a cylinder head cover, and that is formed integrally with any one of the engine cover (2) and the cover (3) for a cylinder head cover and elastically contacted with an elastic member (21) included in the other thereof using elastic contact force of the elastic member (21). The blocking member (4) is provided between a heat source (93) on one side and a member (940, 941) to be protected on the other side.