Oil Scraper Ring Spring Anti-Rotation Design
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Solution Overview
Problem
Existing oil scraper rings in internal combustion engines experience undesired relative movements between components, leading to wear and tear, and challenges during transport and operation.
Innovation Solution
An oil control ring spring with alternately arranged upper and lower regions, connected by nose portions and bearing sections, featuring an anti-twist projection that engages with the metal rings to prevent rotation and reduce wear, ensuring secure alignment and operation without interfering with the oil ring groove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an oil scraper ring is made up of several components (oil control ring spring, upper and lower metal rings), then the functionality of wiping off excess oil is improved, but undesired relative movements between components occur leading to wear
Solution Approach 1:
The patent introduces an intermediary connection between the oil control ring spring and metal rings through the anti-twist projection and corresponding groove. This intermediary feature prevents direct relative movement between components while maintaining their functional independence, thereby resolving the contradiction between functionality and component stability.
Solution Approach 2:
The anti-twist projection is nested within the groove structure, creating a hierarchical arrangement where the spring is nested within the ring assembly. This nesting prevents relative movement while maintaining the multi-component functional design, addressing both functionality and reliability requirements.
2Adaptability or versatility
If an oil scraper ring is made up of several components, then the functionality is improved, but problems during transport and assembly occur
Solution Approach 1:
The oil scraper ring is segmented into distinct functional components (spring, upper metal ring, lower metal ring) that can be manufactured separately and then assembled through the anti-twist projection and groove interface. This segmentation enables independent manufacturing optimization while ensuring reliable assembly, resolving the contradiction between functionality and ease of operation.
3Reliability
If anti-twist projections are made tall to prevent rotation, then anti-rotation effectiveness is improved, but interference with the oil ring groove occurs
Solution Approach 1:
The anti-twist projection is designed with specific local dimensions where the height is optimized to provide sufficient anti-rotation capability while maintaining a profile that does not interfere with the oil ring groove. This local quality optimization resolves the contradiction between anti-rotation effectiveness and groove compatibility.
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 effectively prevents relative movement between the oil control ring spring and metal rings, significantly reducing wear and enhancing the service life while maintaining the oil scraper's functionality of removing excess oil from the cylinder inner wall.
Implementation Method 1
The anti-twist projection is designed as at least one material section that is bent out of the upper or lower support section and possibly partially punched out or cut out
Data Source
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AI summary
The present invention relates to an oil scraper ring spring (4) for an oil scraper ring (2) which is provided for being mounted in an oil ring groove of a piston and the oil scraper ring spring (4) comprises an upper and a lower metal ring (6, 8), wherein the oil scraper ring spring (4) has the following: several upper regions (10) and several lower regions (12) which are arranged alternately in a circumferential direction such that they have a distance in an axial direction; connecting regions (14) which each connect the adjacent upper and lower regions (10, 12) to each other;wherein each of the upper and lower regions (10, 12) has a nose section (16) arranged at the inner circumferential end and designed to press the respective upper or lower metal ring (6, 8) radially outwards, and a support section (20, 22) extending radially between the nose section (16) and the outer circumferential end and designed so that the respective upper or lower metal ring (6, 8) rests on or abuts it;wherein an anti-rotation projection (36, 38) is provided on an upper and/or a lower support section (20, 22), which extends upwards from the plane of the upper support section (20) or downwards from the plane of the lower support section (22) and has a height (H) that is less than or equal to the distance of the upper end of the nose section (16) to the plane of the upper support section (20) or less than or equal to the distance of the lower end of the nose section (16) to the plane of the lower support section (22), or less than or equal to the thickness (D) of the metal ring (6, 8) to be placed on the upper support section (20) or to be placed against the lower support section (22); and wherein the anti-rotation projection (36, 38) is formed as at least one material section bent out of the upper or lower support section (20, 22) and optionally partially punched or cut out.