Segmented Mixture Distribution Device for Combustion Engine Fuel Proportionality
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Solution Overview
Problem
Existing mixture distribution devices, such as inlet manifolds, face challenges in achieving proportional air/fuel distribution among engine cylinders due to the high mass inertia of fuel drops, leading to uneven fuel distribution and reduced engine performance.
Innovation Solution
A mixture distribution device that collects a portion of the air/fuel mixture via a second mixture inlet and proportionally supplies it through a second branch guiding structure to engine cylinders, allowing for simpler distribution and minimizing the impact of any disproportional distribution on engine performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the air/fuel mixture is distributed through a conventional inlet manifold, then the flow can be simplified, but the fuel distribution becomes disproportional among engine cylinders due to fuel drop precipitation on walls
Solution Approach 1:
The mixture distribution device is segmented into a first branch guiding structure with multiple first outlet channels and a second branch guiding structure with multiple second outlet channels. The mixture is divided into a first fraction and a second fraction, with the second fraction being collected and proportionally distributed through the second branch guiding structure to compensate for disproportional distribution in the first branch guiding structure.
Solution Approach 2:
The second branch guiding structure acts as an intermediary element that receives the collected second fraction from the first mixture inlet and redistributes it proportionally through multiple second outlet channels, thereby correcting the disproportional distribution caused by the first branch guiding structure.
2Manufacturing precision
If design concessions are made to achieve proportional fuel distribution, then fuel distribution proportionality is improved, but the flow properties and engine power are reduced
Solution Approach 1:
The mixture distribution device is segmented into a first branch guiding structure with multiple first outlet channels and a second branch guiding structure with multiple second outlet channels. The mixture is divided into a first fraction and a second fraction, with the second fraction being collected and proportionally distributed through the second branch guiding structure to compensate for disproportional distribution in the first branch guiding structure.
Solution Approach 2:
The invention changes the distribution parameters by introducing a second branch guiding structure with different outlet channel configurations. The second fraction is collected from the first mixture inlet and redistributed through the second branch guiding structure with multiple second outlet channels, adjusting the flow distribution parameters to achieve proportionality without compromising overall engine power.
3Adaptability or versatility
If the second mixture inlet is positioned in an interior portion of the first branch guiding structure, then design freedoms are maintained, but the mixture distribution becomes more complex
Solution Approach 1:
The second mixture inlet is positioned in an interior portion of the first branch guiding structure, nesting the second branch guiding structure within the first. This allows the second fraction to be collected and redistributed through the second branch guiding structure while maintaining the overall compact design and design freedoms of the first branch guiding structure.
Solution Approach 2:
The second branch guiding structure acts as an intermediary element that receives the collected second fraction from the first mixture inlet and redistributes it proportionally through multiple second outlet channels, thereby correcting the disproportional distribution caused by the first branch guiding structure.
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 approach ensures a proportional distribution of fuel among engine cylinders, optimizing engine performance while maintaining design freedoms for flow-technical considerations.
Implementation Method 1
the air/fuel mixture is distributed among a number of engine cylinders. During the flow of the mixture in the inlet manifold, particularly with deflection of the flow, depending on the extent of deflection, the flow rate and the drop size, fuel drops will leave the flow and precipitate on the walls of the manifold as a result of the relatively high mass inertia of the fuel drops
Implementation Method 2
fuel drops will leave the flow and precipitate on the walls of the manifold as a result of the relatively high mass inertia of the fuel drops
Implementation Method 3
By collecting a part of the air/fuel mixture supplied to the first mixture inlet, herein referred to as second fraction, by means of the second mixture inlet and proportionally supplying it, via the second branch guiding structure, to the mutually different first outlet channels of the first branch guiding structure, the second fraction is proportionally distributed among the different engine cylinders
Data Source
AI summary
A mixture distribution device (1) for a combustion engine comprises a first mixture inlet (3), multiple first mixture outlets (4) and a first branch guiding structure (6). The mixture distribution device further comprises a second mixture distribution device (21) comprising a second mixture inlet (23), as well as multiple second mixture outlets (24) and a second branch guiding structure (26). An air/fuel mixture supplied to the first mixture inlet (3) is divided into a first fraction (7) and a second fraction (27) which is not collected and is collected, respectively, by the second mixture distribution device.