Vehicle Regeneration Control System for Kinetic Energy Recovery
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Solution Overview
Problem
Existing regeneration control systems for vehicles decrease electric energy generation prematurely to prevent wheel slippage, leading to reduced recovered kinetic energy and potential excessive deceleration, which can result in wheels slipping or the vehicle stopping unexpectedly.
Innovation Solution
The system delays reducing regenerative braking force until actual wheel slippage occurs, allowing maximum kinetic energy recovery and maintaining road grip by only decreasing electric energy generation when slippage is detected, using methods such as angular velocity differences or electric energy decrease rates to determine slippage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electric energy generated by the generator is decreased before wheel slippage is anticipated, then wheel slippage is prevented, but the amount of recovered kinetic energy becomes small
Solution Approach 1:
The system performs preliminary detection of wheel slippage conditions by monitoring angular velocity differences between drive and non-drive wheels, and only then decreases electric energy generation. This allows maximum kinetic energy recovery while preventing slippage by acting just in time rather than prematurely.
Solution Approach 2:
The system continuously monitors wheel angular velocities and provides feedback to the control unit, which adjusts electric energy generation based on detected slippage conditions. This closed-loop feedback mechanism ensures optimal balance between energy recovery and wheel grip maintenance.
2Loss of energy
If the regenerative braking force is increased to maximize energy recovery, then more kinetic energy is recovered, but the vehicle deceleration becomes higher than expected and may cause wheel slippage
Solution Approach 1:
The system dynamically adjusts the regenerative braking force based on real-time detection of wheel slippage conditions. The control unit continuously monitors angular velocity differences and modulates the generator's electric energy generation accordingly, allowing maximum energy recovery while preventing excessive deceleration and wheel slippage.
Solution Approach 2:
The system changes the operational parameters of the generator (electric energy generation level) based on detected wheel conditions. By monitoring angular velocity differences and adjusting the regenerative braking force parameter, the system optimizes energy recovery while avoiding harmful excessive deceleration.
3Loss of energy
If the electric energy generation is delayed until actual slippage occurs, then maximum kinetic energy is recovered, but wheel slippage detection precision must be high
Solution Approach 1:
The system performs preliminary monitoring of wheel angular velocities to detect early signs of slippage. By continuously measuring and comparing angular velocities between drive and non-drive wheels, the system prepares to act at the optimal moment, maximizing energy recovery while maintaining detection accuracy.
Solution Approach 2:
The system replaces complex mechanical slippage prevention mechanisms with an electronic control system that uses sensors and control units to monitor and adjust regenerative braking. This substitution allows for more precise and flexible control of electric energy generation based on real-time wheel conditions.
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
This approach increases recovered kinetic energy and prevents excessive deceleration, ensuring wheels maintain road grip and preventing unexpected vehicle stops during deceleration without friction brake operation.
Implementation Method 1
a technology of converting the kinetic energy of wheels into electrical energy (regeneration) in a motor vehicle or the like by actuating a generator utilizing the kinetic energy of wheels
Data Source
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AI summary
An object of the invention is to increase the recovered kinetic energy as much as possible in a regeneration control system for a vehicle that converts the kinetic energy of a wheel into electrical energy while the vehicle is decelerating. To achieve the object, in the invention, the electric energy generated by a generator is decreased at the time when the wheel slips. In consequence, the recovered kinetic energy can be made larger as compared to the case where the electric energy generated by the generator is decreased based on an anticipation of slippage of the wheel made in advance.