Regenerative Braking Control Using Tire Temperature Feedback
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Solution Overview
Problem
The concentration of regenerative braking force on wheels leads to increased tire surface temperature and slip ratio, accelerating tire wear and dust emission, which affects environmental pollution and reduces fuel efficiency in vehicles with regenerative and friction braking systems.
Innovation Solution
A control system that adjusts the distribution of regenerative and friction braking forces based on tire surface temperature to prevent excessive wear, using a temperature sensor and control unit to manage braking force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If regenerative braking force is maximized to increase power recovery, then fuel efficiency is improved, but tire wear and dust emission are accelerated
Solution Approach 1:
The braking force distribution is made dynamic by continuously monitoring tire surface temperature and adjusting the regenerative braking force accordingly. When temperature approaches the reference threshold, the control device reduces regenerative braking force and increases friction braking force, creating a dynamic adaptation that prevents excessive wear while maximizing energy recovery under normal conditions
Solution Approach 2:
The system changes the distribution parameter of braking force between regenerative and friction braking based on temperature conditions. By monitoring tire surface temperature and comparing it to a reference temperature, the control device adjusts the ratio of regenerative to friction braking force, optimizing both energy recovery and tire protection under different thermal conditions
2Use of energy by moving object
If regenerative braking force is concentrated on wheels to maximize energy recovery, then fuel efficiency is improved, but tire surface temperature and slip ratio increase
Solution Approach 1:
The control device implements a feedback mechanism by continuously acquiring tire surface temperature information and using it to adjust the regenerative braking force. When the temperature approaches the reference threshold, the system automatically reduces regenerative braking force and increases friction braking force, creating a closed-loop control that prevents excessive temperature rise while maintaining energy recovery efficiency
3Use of energy by moving object
If regenerative braking force is increased to improve fuel efficiency, then power recovery is enhanced, but tire wear is accelerated
Solution Approach 1:
The system dynamically adjusts the braking force distribution based on real-time temperature monitoring. Under normal temperature conditions, maximum regenerative braking force is applied to optimize fuel efficiency. When temperature approaches the reference threshold, the system dynamically shifts to friction braking to protect tire service life, creating a dynamic balance between fuel efficiency and tire durability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively suppresses tire wear and improves fuel efficiency by optimizing braking force distribution, balancing power recovery and tire wear through adaptive control.
Implementation Method 1
a surface temperature of the regenerative braking wheel is acquired while the vehicle is traveling
Implementation Method 2
a regenerative braking device that applies a regenerative braking force to a regenerative braking wheel
Data Source
AI summary
The regenerative braking device applies a regenerative braking force to the regenerative braking wheel. Friction braking devices impart friction braking force to each wheel. The control device includes a temperature acquisition unit, a required braking force acquisition unit, and a braking force control unit. The temperature acquisition unit acquires the surface temperature of the regenerative braking wheel while the vehicle is running. The required braking force acquisition unit acquires the required braking force based on the brake pedal operation amount. The braking force control unit distributes the required braking force to the regenerative braking force and the friction braking force of each wheel, and controls the distribution of the regenerative braking force to the required braking force so that the surface temperature of the regenerative braking wheel does not exceed a predetermined reference temperature while the vehicle is running, based on the surface temperature acquired by the temperature acquisition unit.