Intake Manifold Integrating Crankcase Ventilation
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Solution Overview
Problem
Existing internal combustion engine systems face challenges in efficiently evacuating and treating 'blow-by' gases from the crankcase due to complex and large recovery circuits, which increase space requirements and assembly complexity, and require additional connections and materials.
Innovation Solution
A compact intake manifold with an integrated recovery and evacuation circuit, where the ducts are partially shared with the mixing/distribution chamber and pipes, minimizing additional space and material usage, and allowing for efficient gas evacuation without significantly altering the manifold's size or structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate recovery circuit for blow-by gases is added to the intake manifold, then gas evacuation capability is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent integrates the blow-by gas recovery circuit directly into the intake manifold structure. The recovery duct is formed as an integral part of the manifold, sharing common walls and spaces with the air intake passages. This merging of functions eliminates the need for separate, standalone recovery systems while maintaining effective gas evacuation capability.
Solution Approach 2:
The intake manifold is designed to serve multiple functions simultaneously: it distributes air to cylinders, recovers blow-by gases from the crankcase, and provides a pathway for gas evacuation. By making the manifold multi-functional, the patent avoids adding separate dedicated components for each function, thereby reducing overall system complexity.
2Reliability
If a separate recovery circuit is installed, then gas evacuation is improved, but space requirements and material usage increase
Solution Approach 1:
The recovery duct is nested within the existing intake manifold structure. The duct for recovering blow-by gases is positioned inside the manifold body, utilizing available internal space. This nesting approach allows the recovery function to be incorporated without significantly increasing the external dimensions of the manifold assembly.
Solution Approach 2:
The patent combines the air intake passages and blow-by gas recovery ducts into a single integrated manifold structure. By merging these previously separate functions into one component, the overall volume required is reduced compared to having separate dedicated circuits for each function.
3Reliability
If additional connection interfaces are added for gas recovery, then gas evacuation capability is improved, but assembly complexity and manufacturing difficulty increase
Solution Approach 1:
The recovery duct is designed as an integral part of the intake manifold, formed in the same molding or manufacturing process. This eliminates the need for separate assembly steps to attach recovery components to the manifold, simplifying both manufacturing and assembly operations while maintaining effective gas recovery functionality.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
The manifold (1) has a hollow body formed by assembly of two constituent parts that are made of metal or thermoplastic material molding, where a combustion gas recovery conduit (7) and a combustion gas evacuation conduit (8) are combined with the manifold. A mixing chamber of the hollow body is formed with a supply opening that is connected to a mounting plate (6). Multiple pipes (5) are connected with the mixing chamber. An entry opening (7') is formed in the combustion gas recovery conduit. An independent claim is also included for a motor vehicle comprising a distributor/intake manifold.