Regenerative Braking Control Device for Dynamic Power Adjustment
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Solution Overview
Problem
Conventional electric power generation control devices for vehicles struggle to balance regenerative electric power generation with drivability, often resulting in excessive low-speed operation when increasing regenerative power, which decreases drivability.
Innovation Solution
An electric power generation control device that uses multiple relationships between brake operation amounts and target electric power generation amounts to dynamically adjust regenerative power generation based on driver intent, incorporating an operation amount acquisition unit, electric power generation amount acquisition units, and an electric power generation amount instruction unit to control the generator effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the regenerative electric power generation amount is increased, then the electric power generation amount is improved, but the vehicle speed becomes excessively low which decreases drivability
Solution Approach 1:
The patent applies dynamics by making the target electric power generation amount adjustable based on driving conditions. The control device dynamically changes the power generation target according to the relationship between brake operation amount and target power generation amount, allowing the system to adapt between maximizing energy recovery and maintaining drivability based on real-time conditions
2Loss of energy
If the target electric power generation amount is increased to maximize regenerative braking, then energy recovery is improved, but unnecessary deceleration occurs which reduces drivability
Solution Approach 1:
The patent implements feedback control by continuously monitoring the brake operation amount and using it to adjust the target electric power generation amount. The control device acquires brake operation information and selects appropriate target power generation amounts from multiple relationships, creating a closed-loop system that responds to driver input and maintains optimal balance between energy recovery and drivability
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 allows for increased regenerative electric power generation while maintaining drivability by adjusting target power generation amounts according to brake operation changes, reducing unnecessary deceleration and minimizing friction brake wear.
Implementation Method 1
a generator (25) connected to a drive shaft of a vehicle and capable of regenerative electric power generation using regenerative energy during deceleration of the vehicle
Data Source
AI summary
An electric power generation control device applied to a system including a generator capable of regenerative electric power generation, an electric power storage device capable of being charged with electric power, and a friction brake device that generates a braking force. The control device includes an operation amount acquisition unit that acquires a brake operation amount by the driver, an electric power generation amount acquisition units that increase a target electric power generation amount for the generator the larger the brake operation amount is, and have plural relationships of which the target electric power generation amounts that correspond to a certain brake amount differ, and acquire the target electric power generation amount according to one of the relationships based on change in the brake operation amount, and an electric power generation amount instruction unit that controls the generator based on the target electric power generation amount.