Vehicle Braking Control Balancing Energy Recovery and Tyre Wear

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Solution Overview

Problem

Existing vehicle control systems prioritize energy efficiency over tyre wear, leading to increased tyre wear and particulate emissions, which outweigh the benefits of regenerative braking and other energy-efficient strategies.

Innovation Solution

A computer system determines control inputs that balance energy efficiency and tyre wear by calculating costs associated with both factors and optimizing a cumulative cost below a threshold, considering parameters like road inclination, vehicle mass, and longitudinal slip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If regenerative braking is prioritised to improve energy efficiency, then energy recovery is increased, but tyre wear is increased and particulate emissions increase

Engineering Contradiction:

Improveenergy efficiencyVSAvoidtyre wear and particulate emissions

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The system changes the parameters of the braking strategy by dynamically adjusting the regenerative braking torque based on tyre wear cost calculations. When tyre wear cost is high, the system reduces regenerative braking torque and increases service brake usage, thereby reducing tyre wear while maintaining energy efficiency where possible.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback by continuously monitoring tyre wear cost and using this information to adjust the braking strategy. The tyre wear cost is calculated based on tyre state, road conditions, and braking forces, and this feedback loop enables real-time optimization of the balance between energy recovery and tyre preservation.

Inventive Principle:

Principle #23Feedback

2Use of energy by moving object

If regenerative braking torque is increased to maximize energy recovery, then energy efficiency improves, but friction loss increases

Engineering Contradiction:

Improveenergy efficiencyVSAvoidfriction loss

Core Design Contradiction:

Use of energy by moving objectVSLoss of energy

Solution Approach 1:

The system dynamically changes the braking torque parameters by reducing regenerative braking torque when tyre wear cost is high. This parameter adjustment reduces the friction loss between the tyre and road surface while maintaining an optimized energy recovery strategy based on current vehicle conditions.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4613596A1Tyre wear management for a vehicle

Publication Date: 2025.09.10 VOLVO TRUCK CORP

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AI summary

A computer system and computer-implemented method for determining a control input for a vehicle are provided, the method comprising: acquiring, by processing circuitry of a computer system, operational information relating to a manoeuvre of the vehicle; determining, by the processing circuitry, a cost associated with energy efficiency of one or more motion support devices of the vehicle performing the manoeuvre; determining, by the processing circuitry, a cost associated with tyre wear of the vehicle performing the manoeuvre; and determining, by the processing circuitry, a control input such that a cumulative cost of energy efficiency and tyre wear is below a threshold.