Normally Open Single Clutch for Drive Train Assembly
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Solution Overview
Problem
Current motor vehicle drive trains with dual clutches are complex to test and assemble, particularly for single clutches with normally open designs, which complicates the integration of motor and transmission systems, and there is a need for safer and more efficient torque transmission solutions.
Innovation Solution
A single clutch system with a 'normally open' design is mounted on the transmission input shaft via a support bearing, utilizing a clutch actuator with a transmission ratio of contact pressure force to engagement force of approximately 1, and incorporating a wear adjustment device for continuous performance and low noise, allowing for pre-assembly testing and integration with the engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a dual clutch system is used in motor vehicle drive trains, then torque transmission capability is improved, but device complexity and testing difficulty increase
Solution Approach 1:
The patent divides the dual clutch system into two separate single clutch units, each capable of independent operation. This segmentation allows each clutch to be tested and assembled independently before integration, reducing overall system complexity while maintaining the torque transmission capabilities of a dual clutch system.
Solution Approach 2:
The patent designs a universal single clutch unit that can perform multiple functions: torque transmission, engine-motor decoupling, and wear adjustment. This multi-functional design eliminates the need for separate specialized components, reducing device complexity while maintaining effective torque transmission.
2Ease of manufacture
If a normally open single clutch design is used, then assembly flexibility is improved, but testing and integration complexity increases
Solution Approach 1:
The patent implements preliminary testing of the clutch assembly at the transmission manufacturer's facility before final integration with the engine or motor. This preliminary action allows for verification of clutch functionality, wear adjustment mechanisms, and support bearing performance independently, simplifying subsequent integration steps.
Solution Approach 2:
The patent introduces a support bearing as an intermediary element between the clutch assembly and the engine/motor. This intermediary component facilitates easier assembly and disassembly while providing a stable mounting interface, reducing integration complexity.
3Reliability
If wear adjustment device is integrated into the clutch, then clutch performance and noise reduction are improved, but device complexity increases
Solution Approach 1:
The patent implements a self-adjusting wear compensation mechanism that automatically compensates for clutch plate wear during operation. This self-service feature maintains optimal clutch engagement and noise levels without requiring external adjustment mechanisms, improving reliability while minimizing added complexity.
Solution Approach 2:
The patent uses parameter changes in the wear adjustment device, specifically adjusting the axial position of the pressure plate through controlled displacement. This parameter adjustment maintains optimal clutch performance and reduces noise by compensating for wear, achieving improved reliability with minimal structural complexity.
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 solution simplifies the testing and assembly process, enhances safety, and provides efficient torque transmission with reduced wear and noise, enabling a more reliable and cost-effective motor vehicle drive train system.
Implementation Method 1
the clutch is mounted on a transmission input shaft in an axially position-determined manner via at least one support bearing, such as a roller bearing or a plain bearing
Implementation Method 2
A clutch actuator acts on the clutch, which includes a translation in the form of a hydraulic or a mechanical translation
Implementation Method 3
A clutch actuator acts on the clutch, which includes a translation in the form of a hydraulic or a mechanical translation
Implementation Method 4
a friction clutch device is known, in particular for a drive train of a motor vehicle driven by an internal combustion engine
Data Source
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AI summary
The invention relates to a motor vehicle drive train (1) comprising a drive unit and a transmission as well as an intermediate clutch (2), wherein the clutch (2) is designed as a normally open single clutch (4) to be pressed to transmit torque.