Dry Clutch Friction Lining Composition for Heat and Vibration
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Solution Overview
Problem
Conventional dry-running motor vehicle drive systems face challenges in transmitting higher power with lower weight while maintaining driving comfort and fuel efficiency, as metallic friction linings are prone to frictional vibrations and high energy and thermal loads due to limited clutch size.
Innovation Solution
A friction assembly with a mass-pressed, press-sintered dry-running friction lining, optionally with a metallic matrix and porosity, is used in a clutch or brake, featuring a segmented design for improved thermal load capacity and reduced frictional vibrations, and a counter plate with strategically arranged openings for wear reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic friction linings are used to increase resilience and coefficient of friction, then energy and temperature resistance is improved, but frictional vibrations increase negatively impacting driving comfort
Solution Approach 1:
The friction lining combines metallic particles (for thermal and mechanical resilience) with organic binder and fillers (for vibration damping), creating a composite material that balances high-temperature resistance with reduced frictional vibrations
Solution Approach 2:
The patent specifies precise parameter ranges including metallic content (10-40 wt.%), binder content (60-85 wt.%), and fillers (5-20 wt.%) to optimize the balance between thermal resilience and vibration characteristics
2Weight of moving object
If clutch size is reduced to decrease vehicle weight, then weight is improved, but lining area decreases resulting in higher energy and temperature loads
Solution Approach 1:
The friction lining is designed with enhanced thermal parameters including metallic content (10-40 wt.%) for heat resistance, specific binder content (60-85 wt.%) for thermal stability, and fillers (5-20 wt.%) to manage thermal loads in compact clutch designs
Solution Approach 2:
The composite friction lining material combines metals, organic binders, and fillers to create a formulation that can withstand higher thermal loads in reduced-size clutches
3Device complexity
If dry-running friction lining is used to eliminate lubrication and reduce drag torque, then system complexity is reduced and performance is improved, but wear resistance must be maintained without oil cooling
Solution Approach 1:
The friction lining is designed to be self-lubricating through its composition, with the organic binder and fillers providing inherent wear protection and heat dissipation properties that eliminate the need for external lubrication systems
Solution Approach 2:
The multi-component composite material (metals, organic binders, fillers) provides inherent wear resistance and thermal management capabilities that enable dry-running operation without compromising reliability
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 eliminates the need for lubrication, reduces drag torques, and enhances thermal stability and friction power, allowing for higher performance and reduced wear, while maintaining driving comfort by minimizing frictional vibrations.
Implementation Method 1
the friction lining is a pressed-sintered friction lining
Implementation Method 2
which can be brought into frictional engagement with one another
Implementation Method 3
a pressed-sintered friction lining is preferably a sintered metal lining
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a friction assembly comprising a dry clutch plate set (1) with at least one friction lining plate (2) and at least one counterplate (3) that are alternately successively arranged in an axial direction (4) of the plate set (1) and that can be frictionally engaged with each other, the friction lining plate (2) having at least one molded dry friction lining.