Air Intake Valve Frame Reduces Pressure Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing air intake control valve configurations for internal combustion engines face challenges in providing a sufficient cross-sectional area for the air intake passage, leading to increased pressure loss and reduced supercharging effect due to deformation of the partition wall during vibration welding, which affects sealing performance and the uniform contact of the valve with the seal portion.
Innovation Solution
An air intake apparatus with a valve body that rotates between open and closed positions, attached directly to the surge tank, and a manufacturing method involving vibration welding of two members with jig-receiving portions to maintain the shape and prevent deformation, ensuring a larger cross-sectional area and improved sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the valve body is attached directly to the surge tank to increase the cross-sectional area of the air intake passage, then the pressure loss is reduced and supercharging effect is improved, but the partition wall is susceptible to deformation during vibration welding which compromises sealing performance
Solution Approach 1:
The patent introduces a frame-shaped body as an intermediary component between the valve body and the surge tank partition wall. The valve body is attached to the frame-shaped body, which is then fitted into the opening portion of the partition wall. This intermediary structure allows the valve to be positioned optimally for reducing pressure loss while isolating the partition wall from direct welding stresses that cause deformation and sealing issues.
Solution Approach 2:
The patent segments the mounting structure into three distinct components: the valve body, the frame-shaped body, and the surge tank partition wall. This segmentation allows each component to perform its specific function independently - the valve body controls flow, the frame-shaped body provides a stable mounting platform that can be welded without deforming the partition wall, and the partition wall maintains structural integrity and sealing surfaces.
2Ease of operation
If the frame-shaped body is fitted into the opening portion of the partition wall, then the valve can be supported for rotation, but the cross-sectional area of the air intake passage is reduced leading to increased pressure loss
Solution Approach 1:
The frame-shaped body extends in multiple dimensions beyond the simple opening portion of the partition wall. By designing the frame to protrude into the surge tank interior space, the valve body can be positioned such that its sealing surface aligns with the partition wall opening while maintaining adequate clearance for the required cross-sectional area of the air intake passage when the valve is in the open position.
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
The solution enhances the supercharging effect by reducing pressure loss and ensuring adequate intake air flow while maintaining reliable sealing performance by avoiding deformation and ensuring proper contact between the valve and partition wall.
Implementation Method 1
a valve body (21) rotatably attached to the surge tank (1) and configured to rotate between an open position and a closed position to open and close a fluid passage (41)
Implementation Method 2
the air intake apparatus body (105) being formed by a first member (103) to which the valve body (21) is attached and a second member (101, 102) joined to each other
Data Source
AI summary
An air intake apparatus includes an air intake apparatus body including a surge tank, a valve body rotatably attached to the surge tank and configured to rotate between an open position and a closed position to open and close a fluid passage formed at a partition wall dividing an inside of the surge tank into two parts, the valve body being out of contact with the partition wall at the open position and being in contact with the partition wall at the closed position, the air intake apparatus body being formed by a first member to which the valve body is attached and a second member joined to each other, and the first member including a jig-receiving portion arranged in a vicinity of the fluid passage and configured to receive a jig holding the first member when the first member and the second member are being joined to each other.