Intake Manifold Varying Outlet Radius Uniform Flow
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Solution Overview
Problem
Existing intake distributors for internal combustion engines face issues with uneven permeability among branches, leading to malfunctions and degraded performance, particularly affecting the aerodynamic tumble movement of the intake flow due to inhomogeneous flow distribution and increased distance for the intake flow in some branches.
Innovation Solution
The intake manifold features a cylindrical inlet duct with outlet ducts connected via a varying connection radius that increases with the path length from the inlet duct's open end to each outlet duct, ensuring equivalent permeability and promoting aerodynamic tumble movement by using the formula Ri = A*Li + B, where Ri and Li are in millimeters, and A and B are specific coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If outlet ducts are arranged along the inlet duct with increasing distance, then the intake flow can be distributed to multiple cylinders, but the permeability becomes uneven with distant outlets having lower permeability
Solution Approach 1:
The patent applies local quality by varying the connection radius of outlet ducts based on their position. Outlet ducts farther from the inlet have larger connection radii to compensate for increased flow path length, while closer outlets have smaller radii. This localized adjustment ensures uniform permeability across all branches despite their different positions in the manifold.
2Reliability
If the connection radius is increased for distant outlet ducts, then permeability is improved, but the structure becomes more complex
Solution Approach 1:
The patent changes the geometric parameter of the connection radius systematically based on the outlet duct's distance from the inlet. By establishing a quantitative relationship (Ri = A×Li + B) between connection radius and path length, the design achieves uniform permeability through a structured parameter variation rather than arbitrary geometric complexity.
3Productivity
If the intake flow path is extended to reach distant cylinders, then all cylinders can be supplied, but the aerodynamic tumble movement is degraded
Solution Approach 1:
The patent applies preliminary anti-action by pre-compensating for the adverse effects of long flow paths through enlarged connection radii at distant outlets. This proactive geometric adjustment counteracts the natural flow dispersion and pressure loss that would otherwise degrade tumble movement, ensuring uniform aerodynamic quality across all cylinders.
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 design enhances engine performance by maintaining equivalent permeability across all branches and promoting the aerodynamic tumble movement, reducing the negative impact on the aerodynamic movement and ensuring efficient flow distribution.
Implementation Method 1
each outlet duct being connected by a connecting radius to the inlet duct, opposite to the direction of movement of the inlet flow and so that the connection radius of each outlet duct increases in function of the path length of the intake flow from the open end of the inlet duct to the axis of symmetry (δi) of the respective outlet duct to distribute with equivalent permeability the intake flow in each duct of exit
Implementation Method 2
car manufacturers seek to generate an aerodynamic movement of the tumble type (helical swirling movement of the intake flow in the cylinder of the engine and whose axis of rotation is perpendicular to the axis of the cylinder)
Data Source
AI summary
The invention relates to an internal combustion engine inlet manifold (1) comprising an inlet duct (10) with an axis of symmetry (?), the inlet duct (10) being open at one end (101) and closed at the other end (102) and opening on its lateral surface onto a plurality of outlet ducts (Ci), the open end (101) allowing an inlet flow (F) to pass, each outlet duct (Ci) being associated with one cylinder of the engine. Each outlet duct (Ci) is connected by a blend radius (Ri) to the inlet duct (10) the opposite way to the direction of travel of the inlet flow (F). The blend radius (Ri) of each duct (Ci) increases as a function of the path length (Li) of the inlet flow (F) from the open end (101) to the axis of symmetry (di) of the respective duct (Ci) so as to distribute the inlet flow (F) to each duct (Ci) with uniform permeability.