Valve Train Switching Element Bypass Mechanism
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Solution Overview
Problem
Existing switching elements for valve trains in internal combustion engines suffer from delayed displacement and pressure drop due to the sequential filling of chambers, which affects the switching characteristics.
Innovation Solution
The introduction of a bypass mechanism that indirectly fluidly connects the recess of the external part to a chamber, allowing pressure to be applied to the locking element on a larger surface and maintaining fluid connection until a direct connection is established, thereby preventing pressure drops and improving switching efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking element is used to couple the external part and internal part in the coupling position, then the switching element achieves reliable axial coupling, but the sequential filling of chambers causes delayed displacement and pressure drop
Solution Approach 1:
The fluid connection path is segmented into multiple routes: a direct path and at least one indirect path via a bypass. This segmentation allows fluid to fill chambers simultaneously through different paths, eliminating the sequential filling delay while maintaining the locking element's coupling function.
Solution Approach 2:
The bypass acts as an intermediary fluid path that connects the recess to the chamber indirectly. This intermediary route enables parallel fluid flow, allowing pressure to be applied to the locking element on a larger surface area without causing pressure drops, thereby reducing displacement delay.
2Ease of operation
If pressure is applied to the recess to displace the locking element, then the coupling can be released, but sequential chamber filling causes pressure drop affecting switching characteristics
Solution Approach 1:
The fluid pressure application is segmented into multiple parallel paths (direct and indirect via bypass). This allows pressure to be distributed simultaneously to different chambers, maintaining pressure stability during the locking element displacement and improving switching operation consistency.
Solution Approach 2:
The bypass is pre-configured to enable indirect fluid connection before the direct connection is established. This preliminary action ensures that pressure can be applied to the locking element on a larger surface area from the start, preventing pressure drops during the switching operation.
3Stability of the object's composition
If the chamber is spatially separated from the recess by the locking section in the locking position, then the locking element maintains stable coupling, but the chamber cannot be filled until the locking element is displaced
Solution Approach 1:
The fluid connection is segmented into direct and indirect paths. The indirect path via bypass allows the chamber to be filled in parallel with the locking element displacement, eliminating the sequential delay and improving switching speed while maintaining coupling stability through the locking section.
Solution Approach 2:
The bypass ensures continuous fluid connection and parallel chamber filling throughout the locking element displacement process. This continuous action eliminates idle time where the chamber would otherwise wait for the locking element to move, thereby improving productivity without compromising coupling stability.
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 configuration enhances the switching characteristics by ensuring consistent pressure application and reducing delays in displacement, leading to improved operational efficiency of the switching element.
Implementation Method 1
at least one bypass is provided, which indirectly fluidly connects the at least one recess of the external part and a respective chamber
Implementation Method 2
control pressure can be applied to the at least one recess of the external part, thereby radially displacing the at least one locking element from the locking position to a release position
Data Source
AI summary
The disclosure relates to a switching element comprising an external part and an internal part, which is axially displaceable in a bore of the external part. At least one radially displaceable locking element is disposed within at least one receptacle of the internal part and includes a flattened portion on a radially outwardly directed end. At least one recess of the external part can be acted upon by a control pressure and the at least one locking element can thereby be radially displaced from the locking position into a release position. At least in a respective locking position, a chamber delimited by the at least one locking element is spatially separated from the at least one recess of the external part by a respective locking section. At least one bypass is designed, which indirectly fluidly connects the at least one recess of the external part and a respective chamber.