Vehicle Torque Distribution Control for Mode-Based Handling Response
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Solution Overview
Problem
Existing vehicle control methods fail to effectively vary handling responsiveness based on vehicle driving modes and steering input information, limiting the ability to enhance riding comfort or sporty feeling.
Innovation Solution
A method that includes a driving control process based on a roll motion characteristic, where a controller determines a request torque command and distributes it into left and right wheel torque commands, and corrects these commands using a differential control amount determined by the vehicle's driving mode and steering input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a vehicle is set to improve riding comfort by suppressing roll motion, then riding comfort is improved, but handling responsiveness deteriorates
Solution Approach 1:
The patent implements dynamic switching between comfort-oriented and sporty-oriented control modes based on driver selection. The controller adjusts torque distribution to left and right wheels differently depending on the selected driving mode, enabling the vehicle to dynamically transition between suppressing roll motion for comfort or maximizing handling responsiveness for sporty performance.
Solution Approach 2:
The patent changes the control parameters (torque distribution ratios, differential control amounts) based on the selected driving mode. In comfort mode, the system uses parameter settings that prioritize roll motion suppression, while in sporty mode, it uses parameter settings that maximize handling responsiveness, thus resolving the contradiction through parameter adjustment.
2Productivity
If a vehicle is set to maximize handling responsiveness, then handling responsiveness is improved, but riding comfort deteriorates
Solution Approach 1:
The system allows dynamic selection between comfort mode and sporty mode, enabling the vehicle to switch between roll motion suppression (improving comfort) and handling responsiveness maximization (improving productivity) based on driver needs, thus resolving the contradiction through operational flexibility.
Solution Approach 2:
By changing the control parameters (torque distribution, differential control amounts) according to the selected driving mode, the system can optimize for either handling responsiveness or roll motion suppression, resolving the contradiction through parameter adjustment based on operational requirements.
3Ease of operation
If a vehicle provides fixed handling characteristics, then control simplicity is maintained, but adaptability to different driver preferences deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability through multiple driving modes (comfort mode and sporty mode) that allow the vehicle to adjust its handling characteristics based on driver preferences. This enables the same vehicle to provide different handling responses without complicating the control system architecture, as the switching is managed through a unified control framework.
Solution Approach 2:
The control system achieves multi-functionality by incorporating both comfort-oriented and sporty-oriented control strategies within a single system. The controller can universally handle both types of driving requirements by selecting the appropriate mode, thus providing adaptability to different driver preferences without requiring separate control systems.
Data Source
AI summary
A method for controlling driving of a vehicle, can control driving of a vehicle so that handling responsiveness may be differentiated in correspondence to a vehicle driving mode, steering input information by a driver, etc. The method for controlling driving of a vehicle distributes a request torque command into a left wheel torque command and a right wheel torque command, corrects the distributed torque commands using a differential control amount according to a vehicle driving mode and steering input information by a driver, and then performs torque command follow control for controlling torque which is applied to the wheels based on the post-correction torque commands.