Regeneration Control Device Variable Rate Adjustment
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Solution Overview
Problem
Existing vehicles with regenerative braking systems face difficulties in smoothly adjusting regeneration amounts, particularly in achieving rapid changes without cumbersome operations, and struggle to balance immediate large changes with precise adjustments.
Innovation Solution
A regeneration control device with a regenerative braking system that includes a regeneration amount increasing/decreasing operator and controller, where the change rate for increasing operations is set higher than for decreasing operations, utilizing sensors for braking, vehicle speed, and charging rate to optimize regenerative braking force and prevent overcharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the regeneration amount is switched stepwise using a paddle switch, then the regeneration amount can be adjusted, but it is difficult for the vehicle to be decelerated smoothly and requires multiple operations for large changes
Solution Approach 1:
The patent applies dynamics by making the regeneration amount change rate variable rather than fixed. The control device dynamically adjusts the change rate based on the operation state (increasing vs. decreasing), allowing the system to adapt its response characteristics to different operational contexts. This resolves the contradiction by enabling both rapid response when needed and smooth control during adjustment.
Solution Approach 2:
The patent changes the parameter of regeneration amount change rate based on the operation type. By setting different change rates for increasing operations (higher) versus decreasing operations (lower), the system optimizes performance for each direction of adjustment. This parameter differentiation allows rapid increases when the driver needs quick deceleration while maintaining smooth decreases for precise control.
2Reliability
If the regeneration amount is increased rapidly, then collision avoidance performance improves, but the risk of overcharge increases
Solution Approach 1:
The patent implements feedback by continuously monitoring the battery charge state and using this information to modulate the regeneration amount. The control device adjusts the regeneration amount based on both the operator's input and the current battery status, creating a closed-loop control system. This feedback mechanism allows rapid regeneration when the battery can accept charge while preventing overcharge by reducing or stopping regeneration when the battery is sufficiently charged.
Solution Approach 2:
The system dynamically adjusts the regeneration amount based on real-time battery charge state. When the battery charge state is low, the system allows higher regeneration amounts for rapid energy recovery. When the charge state approaches full capacity, the system automatically reduces the regeneration amount to prevent overcharge. This dynamic adaptation resolves the contradiction between rapid energy recovery and overcharge prevention.
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
Enables rapid regeneration amount adjustments suitable for driver intentions, improving deceleration and collision avoidance performance while preventing overcharge by dynamically adjusting regeneration rates based on vehicle status.
Implementation Method 1
a regenerative braking device that performs regenerative braking on a revolving armature for transmitting driving force to running wheels of the vehicle at the time of decreasing a vehicle speed, so as to generate electricity
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A regeneration control device (1) for a vehicle includes: a motor control unit (4) that drives a motor generator (3) connected to running wheels (2) of the vehicle at the time of decreasing a vehicle speed, so as to generate electricity, performing regenerative braking; a paddle switch (12) that performs increasing/decreasing operation on a regeneration amount Tr by the motor generator (3); and a main control unit (20) that performs increasing/decreasing control on the regeneration amount Tr continuously in response to the increasing/decreasing operation by the paddle switch (12), wherein the main control unit (20) sets a regeneration amount increasing rate Ru in an increasing operation of the regeneration amount Tr by operation of an UP switch of the paddle switch (12) to be higher than a regeneration amount decreasing rate Rd in a decreasing operation of the regeneration amount Tr by operation of a DOWN switch (14).