Electrified Vehicle Regenerative Braking Control Near Stop Points
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Solution Overview
Problem
The complexity of operating regenerative braking in electrified vehicles, requiring drivers to manage a paddle shift, brake pedal, and acceleration pedal when stopping and restarting, increases the risk of accidents and reduces operational convenience.
Innovation Solution
A method and apparatus for controlling regenerative braking in electrified vehicles that automatically adjust the level of braking based on remaining distance to a stop point and driver input, allowing for hydraulic or engine braking intervention without manual paddle shift operation, using a control mode determination unit and brake control determination unit to manage braking levels and interventions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual paddle shift operation is used to adjust regenerative braking levels, then braking control precision is improved, but driver operation complexity increases
Solution Approach 1:
The system automatically determines brake control mode and adjusts regenerative braking levels without requiring manual paddle shift operations. The control system monitors vehicle state, remaining distance to stop point, and automatically manages braking intervention, allowing the system to serve itself rather than requiring continuous driver input for mode switching and braking level adjustment.
Solution Approach 2:
The system continuously monitors vehicle state, remaining distance to stop point, and braking effectiveness to automatically adjust regenerative braking levels. Feedback from sensors about vehicle speed, distance, and brake pedal input enables the control system to dynamically optimize braking control without manual intervention.
2Adaptability or versatility
If multiple controls (steering wheel, brake pedal, acceleration pedal, paddle shift) are required for stopping and restarting, then braking control flexibility is improved, but operational safety decreases
Solution Approach 1:
The system extracts and automates the paddle shift control function, removing it from manual driver operation during stopping and restarting maneuvers. By taking out the complex multi-control requirement and automating it through electronic control based on monitored vehicle state and distance to stop point, the system maintains braking flexibility while eliminating the safety risks associated with managing multiple controls simultaneously.
3Ease of operation
If automatic brake control mode determination is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control system integrates multiple functions into a single automated brake control determination unit that handles mode selection, regenerative braking level adjustment, and hydraulic braking intervention decisions. This multi-functional approach maintains ease of operation by presenting a unified automated system to the driver while managing the inherent complexity through integrated control logic that responds to vehicle state and distance parameters.
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 solution simplifies driver operations by automating regenerative braking adjustments and interventions, enhancing safety and convenience by reducing the complexity of stopping and restarting processes.
Implementation Method 1
The regenerative braking refers to deceleration of a vehicle that results from an electric motor charging a battery using kinetic energy of a wheel
Implementation Method 2
a hydraulic braking technique that uses hydraulic braking
Data Source
AI summary
Proposed is an apparatus, software program, and a corresponding method of controlling driving of an electrified vehicle. The method includes increasing a level of regenerative braking on the basis of a remaining distance from the vehicle to a stop-event point when a brake control mode is entered, determining whether or not braking needs to be performed, on the basis of a stop approval signal when the remaining distance is equal to or less than a preset first distance in the brake control mode, and decreasing the level of regenerative braking when a distance of traveling of the vehicle from the stop-event point is equal or greater than a preset second distance in the brake control mode.