Dual Clutch Differential Torque Control for Vehicle Stability
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Solution Overview
Problem
Current motor vehicle control systems face challenges in maintaining stability and driver control in complex driving scenarios, particularly with tire slippage, while also requiring reduced cost, complexity, weight, and calibration efforts, and increased redundancy and robustness.
Innovation Solution
A dual clutch differential system with sensors and actuators, utilizing a control module with program code portions to prioritize torque output, model clutch torque, and estimate joint clutch torque, tire force, and corner torque, employing model predictive control and state estimation algorithms to manage body and wheel motion dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex control systems are used to manage body and wheel motion, then vehicle stability and control precision are improved, but system complexity and cost increase
Solution Approach 1:
The control system is segmented into multiple independent program code portions (first through fifth program code portions) that can be executed separately by the control module. Each code portion handles a specific function: receiving sensor data, prioritizing torque output, modeling clutch torque, estimating joint clutch torque, and generating torque output. This modular segmentation reduces overall system complexity while maintaining comprehensive vehicle stability control.
Solution Approach 2:
The dual clutch differential system is designed to perform multiple functions simultaneously: it manages body motion control, wheel motion control, and torque distribution through a single integrated control module. The system can adaptively switch between different control strategies (open loop, closed loop, model predictive control) based on driving conditions, providing universal control capability across various scenarios without requiring separate dedicated systems.
2Measurement precision
If advanced modeling and estimation algorithms are implemented, then torque distribution accuracy is improved, but computational requirements and processing time increase
Solution Approach 1:
The system pre-establishes the relationship between clutch torque, joint clutch torque, tire force, and corner torque through the fifth program code portion that generates torque output for each clutch. By pre-modeling these relationships and using lookup tables or pre-computed parameters, the system reduces real-time computational burden while maintaining accurate torque estimation and distribution.
Solution Approach 2:
The control system implements feedback mechanisms where sensor data continuously monitors actual vehicle behavior, and the control module adjusts torque distribution based on the difference between expected and actual performance. This feedback loop allows the system to refine torque estimates in real-time without requiring excessively complex computational algorithms, as the feedback corrects for modeling inaccuracies.
3Reliability
If dual clutch differential with multiple sensors and actuators is used, then control precision and redundancy are improved, but system weight and cost increase
Solution Approach 1:
The system merges multiple sensors (wheel speed sensors, ABS sensors, steering angle sensors, inertial measurement units, throttle position sensors, tire pressure monitoring system sensors) and actuators into a single integrated dual clutch differential control system. By combining these components and their functions into one unified system managed by the control module, the patent reduces overall system weight compared to having separate dedicated systems for each function, while maintaining comprehensive monitoring and control redundancy.
Data Source
AI summary
A system for managing vehicle body and wheel motion control with a dual clutch differential includes sensors and actuators disposed on the vehicle, the sensors measuring real-time static and dynamic data and the actuators altering static and dynamic behavior of the motor vehicle. A control module executes program code portions stored in memory. The program code portions receive the real-time static and dynamic data; selectively prioritize torque output from a prime mover of the vehicle through the differential to driven wheels of the vehicle to control a body and the driven wheels; model and estimate clutch torque for each clutch of the dual clutch differential; model and estimate a joint clutch torque, a tire force, and corner torque; and generate a torque output for each clutch of the dual clutch differential that is selected to maintain one or more of body control, wheel control, and stability of the motor vehicle.