EV Drive Pedal Release Timing for Regenerative Braking
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Solution Overview
Problem
Existing electric vehicles do not optimally utilize regenerative braking, leading to inefficient energy recovery and reduced driving range due to suboptimal timing of drive pedal release by drivers.
Innovation Solution
A method that determines optimal positions and times for releasing the drive pedal based on upcoming speed reductions, using notification signals to inform the driver, thereby enhancing regenerative braking through a countdown signal pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the drive pedal is released to enable regenerative braking, then energy recovery is improved, but the timing accuracy deteriorates due to driver reaction time
Solution Approach 1:
The system performs preliminary calculation of the optimal release position based on upcoming speed reductions, and provides advance notification to the driver. This allows the driver to prepare mentally and physically for the precise moment when pedal release should occur, compensating for human reaction time delays and achieving more accurate timing for energy recovery.
Solution Approach 2:
The system continuously monitors vehicle speed, position, and deceleration requirements, then provides real-time feedback to the driver through notifications. This closed-loop feedback mechanism guides the driver to release the pedal at the optimal moment, transforming the open-loop human decision-making process into a controlled feedback system that maximizes energy recovery.
2Loss of energy
If advance notification is provided to the driver, then pedal release timing is improved, but the system complexity increases
Solution Approach 1:
The notification system leverages existing vehicle components (display screens, audio systems, haptic feedback mechanisms) that serve multiple functions. By repurposing these universal components for pedal release notification, the system achieves improved regenerative braking efficiency without adding significant complexity, as the same hardware is used for both original purposes and energy optimization guidance.
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
Enhances the use of regenerative braking, increasing the electric vehicle's driving range by ensuring timely and efficient energy recovery.
Implementation Method 1
the kinetic energy is transformed into electric energy being fed into the traction battery, i.e. the traction battery is charged
Data Source
AI summary
A method for operating an electric vehicle. The method includes receiving an information about an upcoming speed reduction (S1) and determining a release position or a release time at which a drive pedal of the electric vehicle is to be released, such that at a position corresponding to the speed reduction the electric vehicle travels at a speed corresponding to the speed reduction (S2). Moreover, a first notification position is determined for providing a first notification signal concerning the release of the drive pedal (S3). Alternatively or additionally a first notification time is determined for providing a first notification signal concerning the release of the drive pedal (S3). Furthermore, a data processing system is presented. including data processing means for carrying out the above method. Additionally, an electric vehicle including such a data processing system is explained. Also, a corresponding computer program product and a corresponding computer-readable medium are shown.