Drivetrain State Control for Open-Clutch Wheel Speed Synchronization
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Solution Overview
Problem
Existing motor vehicle control systems require multiple separate controllers for different functions, leading to complexity and inefficiency, and fail to ensure safety when the clutch is open, as they cannot accurately prevent torque transmission to the wheels.
Innovation Solution
A method where a control device uses a state controller to synchronize state variables with measured wheel speed when the clutch is open, reducing the need for separate controllers and ensuring safety by preventing undesired torque transmission by adjusting motor torque based on rotational speed specifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate controllers are used to regulate individual drive train functions, then each function can be controlled independently, but the device complexity increases and coordination between controllers becomes difficult
Solution Approach 1:
The patent combines multiple separate controllers into a single integrated control device that manages all drive train functions. This single controller receives inputs from various sensors and coordinates torque distribution, rotational speed control, and clutch management in unified manner, eliminating the complexity of multiple independent controllers while maintaining reliable function control through centralized arbitration and prioritization mechanisms
2Reliability
If traditional control systems are used without clutch state synchronization, then the control system is simpler, but safety cannot be ensured when the clutch is open as torque transmission to wheels cannot be accurately prevented
Solution Approach 1:
The patent implements a feedback mechanism where the control device continuously monitors the clutch state through switching state information and synchronizes this with the model's clutch state variable. When the clutch is detected to be open, the control system immediately adjusts the torque model to prevent torque transmission to the wheels. This closed-loop feedback ensures safety by constantly verifying clutch position and responding appropriately, while the integrated control architecture manages this complexity efficiently
3Productivity
If separate controllers are used for rotational speed control and torque management, then each control function can be optimized independently, but coordination and arbitration between controllers becomes complex
Solution Approach 1:
The patent creates a universal control device that performs multiple functions including rotational speed control, torque management, clutch state synchronization, and safety monitoring. This multi-functional controller uses a comprehensive drive train model that incorporates all these functions, allowing efficient coordination through a single decision-making architecture rather than requiring arbitration between multiple specialized controllers
Data Source
AI summary
A method for operating a motor vehicle, the motor vehicle has a control device and a drive train. The drive train includes as components a motor, a clutch, and at least one wheel. The motor is coupled to the at least one wheel via the clutch. The control device controls a rotational speed of the at least one wheel based on a rotational speed specification using a model mapping the drive train of the motor vehicle. A torque generated by the motor is influenced as the manipulated variable as a function of at least one state variable of the drive train determined on the basis of the model.