Vehicle Torque Control for Steering Response Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle attitude control systems do not balance the response to accelerator pedal operations with steering operations across different traveling modes, leading to driver discomfort due to mismatched vehicle responses.
Innovation Solution
A control system that adjusts torque generation based on steering angle and traveling mode, increasing torque reduction during steering turns more significantly in high-response modes to synchronize accelerator and steering responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the traveling mode is changed to improve accelerator pedal response, then the acceleration response improves, but the steering operation response remains unchanged causing driver discomfort
Solution Approach 1:
The patent applies dynamics by making the torque reduction amount variable based on the traveling mode. The control device dynamically adjusts the torque reduction during steering operations according to the selected traveling mode (normal mode, sport mode, etc.), ensuring that both accelerator pedal response and steering operation response are consistently improved across all modes. This resolves the contradiction by making the system adaptive rather than fixed.
Solution Approach 2:
The patent changes the parameter of torque reduction amount based on the traveling mode. When the traveling mode is changed, the control device modifies the torque reduction parameter during steering operations accordingly. This ensures that the steering response is synchronized with the accelerator response across different traveling modes, eliminating the driver discomfort caused by mismatched responses.
2Speed
If torque reduction is increased for steering operations, then turnability improves, but vehicle stability may be compromised
Solution Approach 1:
The control device dynamically adjusts the torque reduction amount based on the traveling mode and steering conditions. By making the torque reduction variable rather than fixed, the system can optimize turnability while maintaining stability through adaptive control that responds to actual driving conditions and mode selections.
Solution Approach 2:
The patent modifies the torque reduction parameter according to the traveling mode to balance turnability and stability. The control device changes the torque reduction amount based on the selected mode, ensuring that turnability is improved when needed while vehicle stability is maintained through appropriate parameter adjustment.
Data Source
AI summary
A control system for a vehicle is provided, which includes a driving force source configured to generate torque for driving drive wheels, a steering angle related value sensor configured to detect a steering angle related value of a steering device, and a controller configured to control the torque to control the vehicle attitude based on the steering angle related value. The controller acquires a current traveling mode defining a response of acceleration or deceleration of the vehicle to an accelerator pedal operation. Based on the steering angle related value, when determined that a turning operation of the steering device in one direction is performed, the controller performs a torque decreasing control to add deceleration to the vehicle. When the acquired traveling mode is a high response traveling mode, the controller increases a reduction amount of the torque in the torque decreasing control more than in a low response traveling mode.