Gas Flow Unit Curved Chamber for Uniform Exhaust Distribution
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Solution Overview
Problem
In internal combustion engines, the limited space in the engine compartment poses a challenge for achieving uniform gas flow distribution across the cooler area, especially after a substantial change in gas flow direction, which affects the efficiency of exhaust gas recirculation coolers and other gas-conduction systems.
Innovation Solution
A gas flow unit design that extends the gas flow chamber beyond the outlet's projection, incorporating a prolongation and a dividing wall to redirect the gas flow smoothly and prevent swirl, allowing for a uniform distribution of gas across the outlet's cross-section within a short distance, suitable for space-constrained environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a substantial change of direction (90°) is implemented shortly before the cooler inlet to save space, then the space requirement is reduced, but the uniform distribution of gas flow across the cooler area deteriorates
Solution Approach 1:
The patent employs curved transition sections instead of sharp angular bends to redirect the gas flow. The curved geometry allows the gas to follow a smooth path around the bend, reducing flow separation and maintaining more uniform distribution across the cooler inlet area, thus resolving the contradiction between space saving and flow uniformity
Solution Approach 2:
The patent introduces a third dimension by creating a three-dimensional curved transition path for the gas flow. Instead of a simple planar bend, the gas flow chamber is designed with complex spatial curvature that accommodates the 90° direction change while preserving flow distribution characteristics through careful geometric design
2Length of stationary object
If the distance between the direction change region and the cooler inlet is reduced to save space, then the space requirement is reduced, but the uniform distribution of gas flow deteriorates
Solution Approach 1:
The curved transition geometry allows the gas flow to adapt to the direction change over a compact distance. The gradual curvature radius is optimized to provide sufficient flow redistribution within a limited space, enabling uniform distribution even when the distance to the cooler inlet is minimized
Solution Approach 2:
The patent optimizes geometric parameters such as the curvature radius, transition angle distribution, and chamber cross-sectional area variation along the flow path. By carefully adjusting these parameters, the design achieves uniform flow distribution within a shortened distance, resolving the contradiction between compact length and flow uniformity
Data Source
AI summary
A gas flow unit includes a gas flow inlet, a gas flow outlet and a gas flow chamber configured to convey a gas flow from the inlet to the outlet, wherein the gas flow inlet is configured to convey the gas flow in a first direction into the gas flow chamber and wherein the gas flow outlet is configured to convey the gas flow in a second direction from the gas flow chamber, wherein the second direction is angular in relation to the first direction, and wherein the gas flow inlet is an inlet into the gas flow chamber and the gas flow outlet is an outlet from the gas flow chamber. In the first gas flow direction, the gas flow chamber extends beyond a projection of an outer periphery of the gas flow outlet and defines a prolongation configured for conveying a first part of the gas flow such that it enters the gas flow outlet from a different direction than a second part of the gas flow entering the gas flow outlet without passing through the prolongation.