Intake Manifold Venturi for Compact EGR Integration
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Solution Overview
Problem
Existing EGR systems for internal combustion engines are large and protrude significantly, making them difficult to incorporate into applications with stringent packaging requirements, which limits their use in certain engine designs.
Innovation Solution
An intake manifold assembly with a venturi coupled to the intake manifold body, where the venturi receives exhaust gas from the cylinder head and provides it to the intake manifold, reducing the overall footprint and enabling the system to be used in applications where space is limited.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional EGR system is used, then exhaust gas recirculation function is achieved, but the system size becomes large and protrudes significantly
Solution Approach 1:
The patent combines the EGR system with the intake manifold by integrating the venturi device directly into the intake manifold body. The venturi is positioned within the intake manifold such that its upstream end receives exhaust gas from the EGR valve and its downstream end discharges into the intake manifold's air-exhaust gas mixing chamber. This merging eliminates the need for separate EGR piping and reduces overall system footprint while maintaining EGR functionality.
Solution Approach 2:
The venturi device is nested within the intake manifold structure. The venturi body is positioned inside the intake manifold housing, with the air inlet body surrounding the venturi assembly. This nested configuration allows the EGR components to be housed within the existing intake manifold volume, significantly reducing the protruding dimensions and packaging space requirements.
2Area of stationary object
If the venturi is integrated into the intake manifold, then the overall footprint is reduced, but the structural complexity increases
Solution Approach 1:
The intake manifold assembly is segmented into distinct functional modules: the air inlet body, the venturi device (with upstream cylindrical portion, convergent portion, downstream cylindrical portion, and divergent portion), the exhaust gas recirculation valve, and the outlet body. Each module can be manufactured separately and then assembled together, which simplifies the manufacturing process despite the integrated design. The segmentation also allows for easier maintenance and replacement of individual components.
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 allows for a more compact EGR system, facilitating its use in applications with size constraints while maintaining the benefits of exhaust gas recirculation, such as reduced NOx production and lower combustion temperatures.
Implementation Method 1
The venturi has a venturi body in exhaust gas receiving communication with the exhaust gas from the exhaust gas recirculation valve and to provide the exhaust gas to the intake manifold
Implementation Method 2
The intake manifold combines intake air with the exhaust gas from the EGR system and provides the combined air and exhaust gas to the internal combustion engine
Data Source
AI summary
An intake manifold assembly includes an exhaust gas recirculation system and an intake manifold. The exhaust gas recirculation system includes a venturi with a venturi body. The venturi body includes an upstream cylindrical portion, a convergent portion, a downstream cylindrical portion, and a divergent portion. The upstream cylindrical portion is in exhaust gas receiving communication with a cylinder of an internal combustion engine system and configured to receive the exhaust gas from the cylinder. The convergent portion is contiguous with the upstream cylindrical portion and in exhaust gas receiving communication with the upstream cylindrical portion. The downstream cylindrical portion is contiguous with the convergent portion, separated from the upstream cylindrical portion by the convergent portion, and in exhaust gas receiving communication with the convergent portion. The divergent portion is contiguous with the downstream cylindrical portion and separated from the convergent portion by the downstream cylindrical portion.