Regenerative Braking Control Device for Variable Deceleration Limits
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Solution Overview
Problem
Existing regenerative braking systems limit the maximum regenerative braking force during automatic control, restricting energy efficiency compared to manual control.
Innovation Solution
A regenerative braking control method and device that adjusts the upper limit of regenerative deceleration to be smaller during manual control and larger during automatic control, allowing for a greater regenerative braking force in automatic mode while minimizing drivability impact during mode transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the regenerative ratio is prohibited from being set lower than a predetermined value during automatic control, then the drivability during manual control is maintained, but the maximum regenerative braking force during automatic control is limited and energy efficiency cannot be improved
Solution Approach 1:
The patent applies dynamics by making the upper limit of regenerative deceleration variable based on the driving mode. During manual control, the upper limit is set to a first value that ensures comfortable drivability, while during automatic control, the upper limit is increased to a second value that is larger than the first value, enabling greater regenerative braking force and improved energy efficiency. This dynamic adjustment resolves the contradiction by adapting the regenerative deceleration limit to the specific operational context.
2Use of energy by moving object
If the upper limit of regenerative deceleration is increased during automatic control, then energy efficiency is improved, but the drivability impact during mode transitions may increase
Solution Approach 1:
The patent applies parameter changes by adjusting the upper limit of regenerative deceleration based on the driving mode parameter. When the driving mode switches from manual to automatic control, the system changes the regenerative deceleration upper limit parameter from the first value to the second value, allowing optimal regenerative braking performance for each mode while managing the transition smoothly.
Data Source
AI summary
A regenerative braking control method and a regenerative braking control device of the present invention control a drive source that generates a regenerative brake force in such a manner that an upper limit of regenerative deceleration when a driver executes manual control becomes smaller than an upper limit of regenerative deceleration when automatic control is executed.