Dynamic Regenerative Braking Torque Calculation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing regenerative braking systems in vehicles rely on fixed maximum regenerative braking torque values, which do not account for varying conditions, leading to inefficient energy capture and potential vehicle control issues.
Innovation Solution
A dynamic maximum regenerative braking torque calculation method and system that uses sensors and a processor to measure and calculate real-time variables such as wheel speed, vehicle mass, and driver input to determine the optimal regenerative braking torque for maximum energy capture, adjusting the braking torque accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed maximum regenerative braking torque value is used, then the system is simple to control, but energy capture efficiency deteriorates under varying conditions
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed maximum regenerative braking torque value to a dynamically calculated one that adapts to real-time vehicle conditions. The controller continuously calculates the maximum regenerative braking torque based on current vehicle speed, driver input, and other dynamic parameters, allowing the system to optimize energy capture efficiency across varying operating conditions while maintaining manageable control complexity through algorithmic computation.
2Reliability
If a fixed maximum regenerative braking torque is applied, then the system is easy to operate, but vehicle control precision deteriorates at low speeds
Solution Approach 1:
The patent applies parameter changes by making the maximum regenerative braking torque a variable parameter that changes based on vehicle speed and driver input. At low speeds, the controller calculates a reduced maximum regenerative braking torque to prevent sail-on conditions and maintain precise vehicle control. This dynamic parameter adjustment ensures reliable vehicle control across all speed ranges while the automated calculation keeps operation simple for the driver.
3Adaptability or versatility
If regenerative braking torque is limited to a fixed value, then the braking system is stable, but adaptability to different driving conditions deteriorates
Solution Approach 1:
The patent applies feedback by implementing a control system that continuously monitors vehicle speed, driver input, and other parameters, then uses this feedback to dynamically calculate and adjust the maximum regenerative braking torque. This closed-loop feedback mechanism enables the braking system to adapt to different driving conditions in real-time while maintaining stability through controlled, calculated adjustments rather than uncontrolled variations.
Data Source
AI summary
Methods and systems for controlling regenerative braking in a vehicle having a regenerative braking system are provided. Values of one or more dynamic variables are obtained during operation of the vehicle. A maximum regenerative braking torque is calculated using the dynamic variable values. Regenerative braking torque is provided up to the maximum regenerative braking torque.