Regenerative Control Device for Vehicle Position Stability
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Solution Overview
Problem
Existing regenerative control devices face challenges in maintaining vehicle position during regenerative control, especially when performing regenerative control for different wheels simultaneously.
Innovation Solution
A regenerative control device with a regeneration amount setting unit and a regeneration controller that sets and controls the required wheel regeneration amount for each wheel based on traveling conditions, switching the regenerative-controlled wheel in a regeneration performance period shorter than the predicted vehicle behavior-appearance period, and controlling the actual amount of wheel regeneration to match the required amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If regenerative control is performed for different wheels simultaneously, then regenerative power recovery efficiency is improved, but vehicle position stability deteriorates
Solution Approach 1:
The regenerative control is segmented into sequential phases for different wheels rather than simultaneous control. The controller performs regenerative control on one wheel at a time in a switching manner, dividing the overall regenerative process into discrete segments that are executed sequentially. This segmentation prevents simultaneous power adjustments that would cause vehicle position instability while still achieving effective regenerative power recovery across multiple wheels.
Solution Approach 2:
The regenerative control employs periodic switching between different wheels, alternating the regenerative braking application in a rhythmic sequence. The controller periodically switches which wheel receives regenerative control, creating a periodic action pattern that maintains vehicle stability by avoiding concurrent power adjustments on multiple wheels while still achieving comprehensive energy recovery over time.
2Productivity
If regenerative control is performed on each wheel independently, then regenerative energy recovery is improved, but control complexity increases
Solution Approach 1:
The control functions for multiple wheels are merged into a single unified controller that manages all regenerative control operations. Rather than having separate control systems for each wheel, one controller integrates the switching logic and power distribution decisions, coordinating regenerative control across all wheels through a centralized decision-making structure. This merging reduces overall control complexity while maintaining independent regenerative capability for each wheel.
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 efficient regenerative control while maintaining vehicle position, allowing for seamless switching between wheels and optimizing regenerative energy recovery without simultaneous power adjustment, thus enhancing control precision and stability.
Implementation Method 1
a regenerative control device configured to perform regenerative control that converts kinetic energy of a vehicle into electric energy
Data Source
AI summary
A regenerative control device is provided with a host ECU configured to set a required amount of wheel regeneration that is an amount of wheel regeneration required for each wheel of a vehicle based on the required regeneration amount that is an amount of regeneration required in regenerative control that converts kinetic energy into electric energy depending on traveling conditions of a vehicle, and a regeneration controller configured to switch a wheel to be regenerative-controlled in a regeneration performance period shorter than a predicted vehicle behavior-appearance period from the start of regeneration in each wheel of the vehicle to the appearance of the behavior of the vehicle, that is, a period predicted based on the required amount of wheel regeneration and a vehicle speed, and control an actual amount of wheel regeneration for each wheel to the required amount of wheel regeneration.