Torque Transfer Control for Self-Locking Clutch Release
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Solution Overview
Problem
Current torque transfer device control systems fail to effectively mitigate or resolve binding or self-locking of clutches due to torque differentials, which prevents normal disengagement of mechanical components.
Innovation Solution
A method and system for controlling a torque transfer device that identifies a self-locking state, determines the necessary drivetrain unlocking torque and compensation torque, and applies these torques using drivetrain components to counteract the dynamic effects and resolve the self-locking state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If torque transfer device is used to transmit torque between drivetrain components, then vehicle capability and occupant comfort are improved, but binding or self-locking of mechanical components occurs due to torque differentials
Solution Approach 1:
The system applies preliminary anti-action by detecting the self-locking state through torque differential analysis and proactively applying an unlocking torque to counteract the binding effect before it prevents normal operation. The controller monitors torque values from multiple sources and calculates when a self-locking condition is developing, then applies compensating torque through the drivetrain to prevent the harmful self-locking state from fully developing.
Solution Approach 2:
The system changes the torque parameter dynamically by applying variable unlocking torque based on the detected torque differential. The controller calculates the magnitude of self-locking torque required based on the difference between torques at different drivetrain ports, and adjusts the compensation torque accordingly to resolve the self-locking condition while maintaining normal drivetrain operation.
2Adaptability or versatility
If clutch is controlled to adjust torque transfer device operation, then device adaptability is improved, but binding occurs preventing normal disengagement
Solution Approach 1:
The system introduces an intermediary unlocking torque mechanism that mediates between the torque differential causing self-locking and the clutch disengagement requirement. By applying compensation torque through the drivetrain components, the system creates an intermediate state that reduces the net torque differential, allowing the clutch to disengage normally without direct mechanical intervention in the locked clutch mechanism.
3Reliability
If drivetrain components are used to apply unlocking torque, then self-locking state is resolved, but vehicle dynamics are disrupted
Solution Approach 1:
The system applies counterweight principle by introducing a compensation torque that counteracts the disruptive dynamic effects of the unlocking torque. The controller calculates and applies a compensating torque through other drivetrain components that balances the force introduced by the unlocking action, thereby resolving the self-locking state while minimizing disruption to overall vehicle dynamics and maintaining stability.
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 effectively resolves self-locking states in torque transfer devices by applying the appropriate unlocking and compensation torques, ensuring normal operation and minimizing disruptions to vehicle dynamics.
Implementation Method 1
torque differentials may develop across the torque transfer device, preventing normal disengagement of mechanical components like clutches due to binding or self-locking
Data Source
AI summary
A method for controlling a torque transfer device for a vehicle may include identifying a self-locking state of the torque transfer device. The method further may include determining a drivetrain unlocking torque necessary to unlock the torque transfer device in response to identifying the self-locking state. The method further may include determining a drivetrain compensation torque necessary to counteract a drivetrain unlocking torque dynamic effect of the drivetrain unlocking torque in response to identifying the self-locking state. The method further may include applying the drivetrain unlocking torque and the drivetrain compensation torque using one or more drivetrain components of the vehicle in response to identifying the self-locking state.