Adaptive Clutch Engagement Control for Drive Mode Adaptation
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Solution Overview
Problem
Manual transmissions require driver finesse to achieve desired clutch engagement, which can be inconsistent and dependent on driver experience, lacking adaptability to different driving conditions.
Innovation Solution
A torque delivery control system with an automatically controllable clutch that adjusts engagement characteristics based on selected drive modes, allowing for manual clutch control with automatic adjustments for normal, sport, and enhanced traction modes, influencing clutch engagement speed and behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual clutch control is used without automatic adjustment, then driver control flexibility is maintained, but clutch engagement consistency and adaptability to different driving conditions deteriorates
Solution Approach 1:
The clutch control system automatically adjusts engagement characteristics based on detected driving conditions without requiring manual intervention from the driver. The system monitors parameters such as vehicle speed, engine load, and road conditions, then autonomously modifies clutch engagement timing and pressure to optimize performance for each situation, achieving consistent reliable engagement across varying conditions.
Solution Approach 2:
The system dynamically changes clutch engagement parameters including engagement timing, pressure progression rate, and disengagement point based on detected driving conditions. For example, during acceleration the system may advance engagement timing and increase pressure rate, while during fuel-efficient cruising it delays engagement and uses gentler pressure application, thereby adapting clutch behavior to match operational requirements.
2Adaptability or versatility
If clutch engagement characteristic is fixed, then system simplicity is maintained, but adaptability to different driving modes (normal, sport, traction) deteriorates
Solution Approach 1:
The clutch control system transitions from static fixed engagement characteristics to dynamic adjustable characteristics that respond in real-time to driving mode selections and road conditions. The system continuously monitors driver-selected drive modes (normal, sport, traction control) and automatically adjusts engagement parameters including pressure application rate, engagement timing, and disengagement characteristics to match the selected mode's performance requirements.
Solution Approach 2:
The clutch control system is designed to perform multiple functions across different driving scenarios using a single integrated control unit. It handles normal driving efficiency optimization, sport mode performance enhancement, and traction control situations, thereby providing universal adaptability across diverse operating conditions without requiring separate specialized systems for each function.
3Speed
If clutch engagement is optimized for sport mode (rapid engagement), then performance response is improved, but driver comfort and vehicle control during traction-critical situations deteriorates
Solution Approach 1:
The system dynamically adjusts clutch engagement parameters based on detected road conditions and driving modes. During sport mode on high-grip surfaces, the system uses rapid engagement with high pressure application rate for quick power delivery. However, when traction-critical conditions are detected (ice, snow, gravel), the system automatically modifies parameters to use slower engagement with gentler pressure progression, preventing wheel spin and maintaining vehicle control stability.
Solution Approach 2:
The system proactively detects potential traction loss conditions before they occur and pre-adjusts clutch engagement characteristics to prevent harmful effects. By monitoring road surface conditions, vehicle speed, and engine torque demands, the system anticipates situations where rapid engagement could cause wheel spin or loss of control, and提前 modifies engagement parameters to maintain stable vehicle operation throughout the engagement process.
Data Source
AI summary
An illustrative example vehicle torque control system includes a clutch that is at least partially automatically controllable. A manual clutch control means allows a driver to control engagement of the clutch. A clutch control means automatically controls a characteristic of clutch engagement based on a selected drive mode.