Switch Valve Design for Reliable Hydraulic Flow Control
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Summary
Problems
Existing switch valves for internal combustion engines with variable compression ratios are complex and expensive to reconfigure, prone to material fatigue, and risk hydraulic short circuits due to excessive impression forces and deformation, which can lead to engine damage.
Innovation solutions
A cost-effective switch valve design featuring a spring-loaded interlocking element with a cylindrical pin in the valve housing, allowing for axial displacement and limited travel, reducing the need for complex interlocking contours and minimizing impression forces, with a transition fit or press fit for secure mounting and reduced leakage.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If a complex interlocking contour is used in the switch valve, then the interlocking reliability is improved, but the manufacturing complexity and cost increase
Why choose this principle:
The interlocking mechanism is segmented into separate functional elements: a simple cylindrical interlocking pin in the valve housing and a corresponding recess in the connecting rod. This segmentation replaces complex interlocking contours with simpler, modular components that achieve the same interlocking function with reduced manufacturing complexity.
Principle concept:
If a complex interlocking contour is used in the switch valve, then the interlocking reliability is improved, but the manufacturing complexity and cost increase
Why choose this principle:
The interlocking pin acts as an intermediary element between the valve housing and connecting rod. Instead of creating complex direct interlocking contours between the two main components, the cylindrical pin serves as a mediator that provides reliable interlocking through a simple geometric form that is easier to manufacture.
Application Domain
Data Source
AI summary:
A cost-effective switch valve design featuring a spring-loaded interlocking element with a cylindrical pin in the valve housing, allowing for axial displacement and limited travel, reducing the need for complex interlocking contours and minimizing impression forces, with a transition fit or press fit for secure mounting and reduced leakage.
Abstract
A switch valve for controlling a hydraulic fluid flow, the switch valve comprising a tapping element that is arranged in a valve housing, wherein the tapping element is displaceable into a first switching position or a second switching position and interlockable by a spring loaded interlocking element in the first switching position or the second switching position, wherein a first hydraulic connection is connected with a relief connection in the first switching position and a second hydraulic connection is connected with the relief connection in the second switching position, wherein a switching travel of the tapping element is limited, wherein the interlocking element is at least partially arranged in a recess of the tapping element, wherein the valve housing includes a first groove that is oriented in an axial direction of the valve housing and limited in the axial direction.