Synchronizing Ring Through-Holes for Faster Oil Evacuation
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Solution Overview
Problem
Current synchronizing rings in vehicle transmissions face challenges in quickly achieving maximum friction coefficient and maintaining constant friction during synchronization, leading to inefficiencies in gear shifting.
Innovation Solution
A synchronizing ring design featuring through holes that extend from the inner to the outer surface, angled to facilitate oil evacuation via centrifugal force, allowing for rapid oil removal and improved friction coefficient consistency, with strategically arranged holes to maintain strength and friction surface area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional solid synchronizing rings are used, then structural strength is maintained, but oil evacuation from the friction interface is slow leading to delayed synchronization
Solution Approach 1:
The synchronizing ring incorporates through-holes creating a porous structure that enables rapid oil evacuation from the friction interface. The holes allow oil to be quickly removed via centrifugal force during synchronization, accelerating the achievement of maximum friction coefficient while maintaining sufficient structural strength through strategic hole distribution and sizing.
2Reliability
If the friction coefficient varies during synchronization, then synchronization performance deteriorates, but traditional designs cannot maintain constant friction
Solution Approach 1:
The through-holes enable dynamic control of oil presence at the friction interface during synchronization. By allowing rapid oil evacuation, the design changes the lubrication parameter from oil-lubricated to dry friction conditions, maintaining a more constant friction coefficient throughout the synchronization phase and improving overall synchronization reliability.
3Productivity
If multiple rows of through holes are added to improve oil evacuation, then friction surface area decreases, but sufficient strength must be maintained
Solution Approach 1:
The through-holes are strategically positioned and sized to create local quality variations in the synchronizing ring. The hole distribution pattern ensures adequate oil evacuation capability in critical areas while maintaining sufficient material presence for structural strength. The longitudinal angle of the holes further optimizes oil removal efficiency without compromising overall ring integrity.
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 reduces shifting time and enhances synchronization performance by efficiently evacuating oil and maintaining consistent friction, improving gear shifting efficiency.
Implementation Method 1
the oil can be removed very quickly from the friction surfaces via the through holes due to the centrifugal force
Implementation Method 2
achieving friction between an outer surface of the inner ring and an inner surface of the synchronizing ring during synchronization
Data Source
AI summary
A synchronizing ring for a synchronizer having an inner ring. The synchronizing ring is designed to be arranged outside of and to abut against the inner ring for achieving friction between an outer surface of the inner ring and an inner surface of the synchronizing ring during synchronization. The synchronizing ring has a plurality of through holes extending from the inner surface to an outer surface of the synchronizing ring for evacuation of oil from the interface between the inner ring and the synchronizing ring.