Intake Manifold Material Split for Thermal Stress
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Solution Overview
Problem
The existing intake manifold designs for V-type internal combustion engines face stress and potential damage due to thermal expansion of cylinder heads, which leads to concentrated force transmission and potential deformation, especially in the central section between the first and second banks.
Innovation Solution
The intake manifold is configured with separate, highly rigid downstream parts made of cast iron coupled to the upstream part made of aluminum alloy, which disperses the force transmission and reduces the risk of damage, while maintaining efficient heat transfer and radiation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the downstream part of the intake manifold is made of a heavy, highly rigid material to withstand thermal expansion stress, then the strength and damage resistance are improved, but the weight of the intake manifold increases
Solution Approach 1:
The patent applies different material properties to different parts of the intake manifold: the downstream part (subject to thermal expansion stress) is made of a highly rigid material with a rigidity modulus of at least 10 GPa, while the upstream part can use lighter materials. This local differentiation allows the manifold to withstand stress where needed without unnecessarily increasing overall weight.
Solution Approach 2:
The patent employs composite construction by combining materials with different rigidity moduli in the same intake manifold assembly. The downstream part uses high-rigidity material (≥10 GPa) to resist deformation from thermal expansion, while other parts may use lighter materials, creating a composite structure that optimizes both strength and weight.
2Stability of the object's composition
If the downstream part is made of heavy material to ensure rigidity, then the rigidity is improved, but the heat transfer efficiency deteriorates due to lower heat conductivity
Solution Approach 1:
The patent implements local quality by assigning different material properties to different sections: the downstream part uses high-rigidity material for structural stability, while the upstream part uses materials optimized for heat transfer. This spatial differentiation of material properties allows each section to perform its primary function efficiently without compromising the other.
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 ensures the required rigidity without using heavy materials, reduces the risk of damage from thermal expansion, and facilitates rapid engine warm-up by optimizing heat conductivity and radiation.
Implementation Method 1
a material of the first downstream part and a material of the second downstream part both have a higher rigidity than a material of the upstream part
Implementation Method 2
optimizing heat conductivity and radiation
Implementation Method 3
optimizing heat conductivity and radiation
Data Source
AI summary
A first downstream part of an intake manifold has a first downstream passage configured to communicate with an intake port of a first cylinder head. A second downstream part of the intake manifold has a second downstream passage configured to communicate with an intake port of a second cylinder head. An upstream part is coupled to the first downstream part and the second downstream part. The upstream part is arranged upstream from the first and second downstream parts in the flow direction of intake air and has a first upstream passage and a second upstream passage. The material of the first downstream part and the material of the second downstream part both have higher rigidity than the material of the upstream part.