Tyre Wear Limits for Regenerative Braking Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle control systems prioritize energy efficiency and safety without considering tyre wear, leading to increased tyre wear, reduced friction, and particulate emissions, which outweigh the benefits of regenerative braking.
Innovation Solution
A computer system determines a tyre wear limit and associated costs to balance tyre wear with operational considerations by setting limits for control parameters such as axial torque and longitudinal slip, ensuring vehicle performance optimization without compromising tyre performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If regenerative braking is prioritised to increase energy efficiency, then energy efficiency is improved, but tyre wear increases leading to reduced friction and increased particulate emissions
Solution Approach 1:
The system dynamically adjusts the axial torque parameter applied to the wheels based on real-time tyre wear monitoring. When tyre wear approaches the predetermined limit, the control system modifies the torque parameter to reduce further wear, thereby balancing energy efficiency with emission reduction. This involves changing operational parameters (torque levels) to prevent excessive tyre degradation that would increase particulate emissions.
Solution Approach 2:
The system implements a feedback mechanism where tyre wear is continuously monitored and measured. The measured wear data is fed back to the motion management control system, which then adjusts regenerative braking intensity and axial torque applications accordingly. This closed-loop feedback ensures that energy efficiency goals are pursued while staying within tyre wear limits that would otherwise lead to excessive particulate emissions.
2Use of energy by moving object
If regenerative braking is prioritised to increase energy efficiency, then energy efficiency is improved, but tyre wear increases leading to reduction of friction
Solution Approach 1:
The system dynamically adjusts the axial torque parameter applied to the wheels based on real-time tyre wear monitoring. When tyre wear approaches the predetermined limit, the control system modifies the torque parameter to reduce further wear, thereby balancing energy efficiency with friction maintenance. This involves changing operational parameters (torque levels) to prevent excessive tyre degradation that would reduce friction.
Solution Approach 2:
The system implements a feedback mechanism where tyre wear is continuously monitored and measured. The measured wear data is fed back to the motion management control system, which then adjusts regenerative braking intensity and axial torque applications accordingly. This closed-loop feedback ensures that energy efficiency goals are pursued while maintaining adequate tyre friction by preventing excessive wear.
3Productivity
If vehicle performance is optimised without tyre wear constraints, then operational efficiency is improved, but tyre wear exceeds acceptable limits
Solution Approach 1:
The system establishes predetermined tyre wear limits before excessive wear occurs. These limits are set based on tyre characteristics, vehicle operating conditions, and manufacturer recommendations. By proactively defining these limits in advance, the system can prevent tyre degradation before it compromises service life, while still allowing maximum operational efficiency within safe boundaries.
Solution Approach 2:
The system dynamically adjusts control parameters such as axial torque and regenerative braking intensity based on real-time tyre wear status. When wear approaches the predetermined limit, the system modifies these parameters to reduce stress on the tyres, thereby extending service life while maintaining acceptable operational efficiency. This involves adaptive parameter changes rather than fixed operational modes.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A computer system for determining a limit for a control parameter for a vehicle the computer system comprising processing circuitry configured to: acquire a tyre wear limit for one or more wheels of the vehicle; acquire a first cost evolution associated with a control parameter for the vehicle; and determine a limit for the control parameter based on the first cost evolution and the tyre wear limit; wherein control of the vehicle according to the limit for the control parameter does not exceed a cost associated with the tyre wear limit.