Turbocharger Bypass Valve Doubly Rotatable Flap
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Solution Overview
Problem
Existing bypass valves in turbocharging systems require large installation space, have limited response characteristics, and can obstruct flow due to their design, which hinders the optimization of the drive train system.
Innovation Solution
A bypass valve with a doubly rotatable flap mechanism, featuring two axes of rotation offset from the pipe section's center axis, allowing for specific kinematics that prevent jamming and enable efficient opening without blocking fluid flow, while minimizing installation space and utilizing spring-loaded leg springs for adjustable force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional throttle or flap valve with circumferential seal is used, then the valve can provide sealing function, but it requires large installation space and has limited response characteristics
Solution Approach 1:
The patent transitions from a single-axis rotation to a doubly rotatable mechanism with two perpendicular axes (first and second axes of rotation). This dimensional change enables the flap to open in a controlled manner that prevents jamming while maintaining compact installation space within the pipe section.
Solution Approach 2:
The doubly rotatable flap mechanism introduces dynamic control over the opening action. The flap can rotate about the first axis and then the second axis, enabling a sequential opening motion that improves response characteristics and eliminates blocking issues compared to conventional single-axis valves.
2Ease of operation
If a linearly functioning check valve pretensioned with spring is used, then the valve can provide automatic opening function, but it requires relatively large installation space
Solution Approach 1:
The patent employs a doubly rotatable mechanism with two perpendicular axes instead of a linear motion mechanism. This allows the spring-loaded flap to open automatically while occupying minimal space within the pipe section, as the rotational motion occurs in multiple dimensions rather than requiring linear travel space.
3Area of stationary object
If the flap is mounted to be doubly rotatable via two axes of rotation offset from center axis, then the valve achieves small installation space and improved flow characteristics, but the mechanism complexity increases
Solution Approach 1:
The rotation mechanism is segmented into two independent axes (first and second axes of rotation) that are perpendicular to each other. This segmentation allows each axis to handle a specific degree of freedom, simplifying the overall mechanism design while achieving compact installation and preventing jamming through distributed rotational control.
4Device complexity
If conventional single-axis rotating flap is used, then the valve structure is simple, but the opening action may cause blocking or jamming of the flap
Solution Approach 1:
By adding a second rotation axis perpendicular to the first, the patent enables the flap to open in a two-stage rotational motion. This dimensional change prevents the flap from blocking the flow path or jamming against the pipe wall, as the sequential rotation about two axes provides a clear opening trajectory that avoids contact with obstructing surfaces.
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 design achieves a smaller spatial requirement, variable force determination for opening, and improved throughflow characteristics, ensuring the valve opens fully without obstructing the flow, thus enhancing the system's efficiency and adaptability.
Implementation Method 1
At least one spring, which counteracts a rotation of the flap about the first axis of rotation, may be arranged about the pivot pin
Data Source
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Figure 2B
AI summary
The present invention relates to a bypass valve for an engine with turbocharging for use in a pipe section of a bypass. The bypass valve has a sealing device which comprises a flap. The flap is mounted to be doubly rotatable via a first axis of rotation and via a second axis of rotation.