Intake Manifold Stepped Portion Curved Wall Airflow
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Solution Overview
Problem
Conventional intake manifolds experience increased pressure loss due to rapid changes in the course of intake air as it is introduced into intake pipes, leading to inefficient air distribution.
Innovation Solution
The intake manifold incorporates a stepped portion with an erected wall and a curved wall connecting it to the surface, along with a concave portion recessed toward the stepped portion, which gently changes the course of intake air, enhancing distribution while reducing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If intake pipes are simply connected to the surface of the surge tank, then the structure is simple, but the course of intake air changes rapidly causing increased pressure loss
Solution Approach 1:
The patent applies curvature by forming a curved surface at the connection between the surge tank and intake pipes, replacing sharp edges with smooth curved transitions. This curved surface guides the intake air to change its course gently rather than abruptly, reducing turbulence and pressure loss while maintaining structural simplicity.
2Quantity of substance
If a protrusion is provided on the inner wall of the surge tank to enhance air distribution, then air distribution is improved, but the pressure loss in the surge tank increases
Solution Approach 1:
Instead of using a protrusion that creates sharp edges and turbulence, the patent employs a curved surface that smoothly redirects airflow. This curved transition zone enhances air distribution to multiple intake pipes while maintaining gentle flow transitions that minimize pressure loss.
3Quantity of substance
If a control wall is provided to form a small cross-sectional area space, then air distribution is enhanced, but intake air easily flows to the closest intake pipe depending on introduction port shape
Solution Approach 1:
The curved surface extends from the surge tank connection and gently guides airflow in a controlled manner. This curved geometry creates a more uniform flow distribution to multiple intake pipes, reducing the tendency for air to preferentially flow to the closest pipe, while avoiding the sharp edges and small cross-sectional spaces that cause turbulent flow patterns.
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 effectively enhances air distribution to each intake pipe while minimizing pressure loss, improving the overall efficiency of air delivery to engine intake ports.
Implementation Method 1
a curved wall connecting a tip side of the erected wall and the surface of the surge tank... the intake air introduced into the surge tank from the intake air introduction port is introduced into each intake pipe with its course changed gently by a wall surface of the concave portion or a curved wall of the stepped portion
Data Source
AI summary
The intake manifold includes an intake air introduction port, a surge tank and a plurality of intake pipes. The intake air introduction port is connected to one end side of the surge tank in a direction in which the intake pipes are arranged. The surge tank is provided with a stepped portion over the direction in which the intake pipes are arranged. The stepped portion has an erected wall erected from a surface of the surge tank and connected to the plurality of intake pipes, and a curved wall connecting a tip side of the erected wall and the surface of the surge tank. Further, the surge tank is provided with a concave portion recessed toward the stepped portion at an intermediate portion in the direction in which the intake pipes are arranged.