Oil Scraper Ring Spring Recess Layout for Residue-Resistant Oil Flow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oil scraper ring springs in internal combustion engines experience low oil flow between the spring and metal rings, leading to residue accumulation and wear, which affects engine performance and emissions.
Innovation Solution
The oil scraper ring spring features alternating upper and lower regions with nose sections and abutment sections that include recesses increasing in depth and width towards through-openings, enhancing oil flow and drainage, and reducing friction and wear by facilitating improved oil transport and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oil scraper ring spring uses a conventional design with constant-depth recesses, then the structure is simple and easy to manufacture, but oil flow between the spring and metal rings is low causing residue accumulation and wear
Solution Approach 1:
The recess depth in the abutment section is varied locally rather than being constant throughout. The recess starts at a first depth at the outer circumferential end and transitions to a second, greater depth toward the inner circumferential end. This local variation in recess depth creates improved oil flow paths without requiring complete redesign of the entire structure, resolving the contradiction between reliability improvement and device complexity.
2Reliability
If the recess depth is increased uniformly throughout the abutment section, then oil flow improves, but the metal ring abutment stability decreases
Solution Approach 1:
Instead of uniformly increasing recess depth throughout the abutment section, the invention applies local quality by varying the recess depth at different locations. The recess has a first depth at the outer circumferential end (providing stability) and a second, greater depth toward the inner circumferential end (enhancing oil flow). This localized variation resolves the contradiction between improving oil flow and maintaining abutment stability.
Solution Approach 2:
The abutment section is effectively segmented into different depth zones within the recess structure. The recess transitions from a first depth region to a second depth region, creating distinct functional zones that separately address stability and oil flow requirements, thereby resolving the contradiction between these two opposing requirements.
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 design increases oil flow between the oil scraper ring spring and metal rings, removes combustion residues, reduces wear, and minimizes carbon buildup, thereby improving engine efficiency and reducing pollutant emissions.
Implementation Method 1
the depth of which, relative to the abutment area of the abutment section, increases in the radial direction towards the through-opening
Implementation Method 2
an oil pressure builds up at the radial outer diameter and at the inner diameter of the oil scraper ring spring
Implementation Method 3
a nose section arranged at the inner circumferential end and adapted to push the respectively abutting upper or lower metal ring radially outwardly
Implementation Method 4
nose section... adapted to push the respectively abutting upper or lower metal ring radially outwardly
Implementation Method 5
reduces wear... by facilitating improved oil transport
Data Source
AI summary
The present invention relates to an oil scraper ring spring (1) for an oil scraper ring (3) comprising the oil scraper ring spring (1), an upper and a lower metal ring (21, 22) and provided for being mounted in an oil ring groove of a piston. The oil scraper ring spring (1) comprises a plurality of upper regions (5) and a plurality of lower regions (7) arranged in alternating manner in a circumferential direction so as to be spaced in an axial direction; connecting regions (9) each connecting the adjacent upper and lower regions (5, 7) to each other. Each of the upper and lower regions (5, 7) comprises: a nose section (13) disposed at the inner circumferential end and adapted to push the respectively abutting upper or lower metal ring (21, 22) radially outwardly, and having a through-opening (15); an abutment section (17) extending radially between the nose section (13) and the outer circumferential end and configured to have the respective upper metal ring (21) abutting thereon or the respective lower metal ring (22) abutting thereon; wherein the abutment section (17) has a recess (19) formed therein the depth of which, relative to the abutting area of the abutment section (17), increases in the radial direction towards the through-opening (15), and the width of which increases in the radial direction towards the through-opening (15); wherein the recess (19) in the abutment section (17) has substantially the shape of a half-funnel; wherein the half-funnel has an opening angle of 30° to 150°, in particular of 30° to 60°, or wherein the upper side edges of the recess (19) span an angular segment of 5-50°, in particular 5-15°; and wherein increasing the depth and width of the recess (19) radially inwardly together with the through-opening (15) serves to increase and accelerate the oil flow to the piston center.