Clutch Engagement Position Monitoring for Wear-Out Detection
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Solution Overview
Problem
Current methods fail to effectively detect when a clutch is nearing the end of its wear life, leading to potential sudden torque transmission failure and damage to the engine flywheel, necessitating timely servicing to prevent costly repairs.
Innovation Solution
A method involving position sensing to detect engaged clutch positions, averaging these values, and comparing the rate of change to determine when the clutch wear deviates from normal, utilizing an adjustment mechanism with a hard stop to convert self-adjusting clutches to wear-through style, allowing for timely notification of wear-out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no wear detection method is implemented, then the clutch can operate without additional components, but the clutch wear life cannot be monitored leading to sudden failure and flywheel damage
Solution Approach 1:
The patent replaces complex mechanical wear detection methods with electronic sensing and computational analysis. Position sensors electronically monitor clutch engagement characteristics, and algorithms analyze the data to detect wear patterns, substituting mechanical inspection systems with electronic monitoring to achieve reliable wear detection without mechanical complexity
Solution Approach 2:
The clutch system performs self-diagnosis by monitoring its own engagement position characteristics. The system uses the clutch's inherent positional data during engagement to automatically detect wear conditions without requiring external inspection or additional active sensing components, enabling the system to monitor itself using existing operational parameters
2Duration of action of moving object
If the friction material wears to the point of rivet contact, then the clutch continues to function, but the friction material may separate from the driven disk assembly causing sudden torque transmission failure
Solution Approach 1:
The system performs preliminary detection of wear conditions by continuously monitoring clutch engagement position characteristics before the friction material completely wears through. The algorithm detects abnormal position patterns that indicate approaching wear limits, allowing proactive service scheduling before catastrophic failure occurs, thus maintaining reliable torque transmission throughout the extended monitoring period
Solution Approach 2:
The system establishes a feedback loop where clutch engagement position data is continuously collected, analyzed, and used to determine wear status. The analysis feedback indicates when the clutch approaches wear-out conditions, enabling timely intervention before torque transmission reliability is compromised by complete material wear or separation
3Ease of manufacture
If the rivets contact the engine flywheel due to friction material wear, then the clutch structure is exposed, but the rivets would damage the surface of the engine flywheel requiring resurfacing or replacement
Solution Approach 1:
The system takes preliminary action by detecting clutch wear conditions before the friction material wears to the point where rivets would contact and damage the flywheel. The wear detection algorithm identifies abnormal engagement patterns that precede complete material wear, allowing service to be performed while the friction material is still intact, thus preventing flywheel surface damage before it occurs
Solution Approach 2:
The system applies preliminary anti-action by preventing the harmful condition of rivet-to-flywheel contact through early wear detection. By monitoring engagement position characteristics and detecting wear-induced anomalies, the system enables proactive clutch replacement or adjustment before the friction material wears through to expose rivets, thereby preemptively protecting the flywheel surface from damage
Data Source
AI summary
A method of clutch wear notification comprises detecting engaged clutch positions at a first interval and storing the values of the engaged clutch positions. The stored values of the engaged clutch positions can be averaged at a second interval to create running averages, and the running averages can be stored. The running averages are compared at a third interval to determine a rate of change in the clutch positions. A clutch wear-out is signaled when comparing the running averages indicates that the rate of change in the clutch positions deviates from a normal rate of change. The clutch position during an engaged condition can deviate from the normal rate of change when the axial position of the release bearing begins to increase due to an adjustment mechanism ceasing to adjust.