EV Pedal Control with Adaptive Regenerative Deceleration Modes
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Solution Overview
Problem
Electric vehicles with one-pedal functionality face challenges in maintaining optimal deceleration and regeneration rates, leading to increased driver stress, especially when transitioning between cruising and decelerating in response to surrounding vehicles.
Innovation Solution
A pedal control system for electric vehicles that includes a first mode without regenerative braking and a second mode with regenerative braking, featuring multiple sub-modes, where an electronic controller adjusts the operating mode based on driver selection and environmental conditions, such as the presence of lead vehicles, to optimize deceleration and regeneration rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If regenerative braking is enabled in one-pedal functionality, then energy recovery and deceleration control are improved, but driver stress increases due to difficulty in regulating deceleration rates
Solution Approach 1:
The system changes the regenerative braking parameter (deceleration rate) based on detected driving conditions. When a lead vehicle is detected, the system automatically adjusts the deceleration rate to match the lead vehicle's deceleration, thereby reducing driver stress while maintaining energy recovery efficiency.
2Speed
If the vehicle decelerates quickly when the accelerator pedal is released, then response time is improved, but driver control precision deteriorates
Solution Approach 1:
The system uses feedback from lead vehicle detection to automatically adjust deceleration rates. By monitoring the lead vehicle's deceleration and comparing it with the host vehicle's deceleration, the system maintains precise speed regulation while providing appropriate deceleration response.
3Adaptability or versatility
If multiple sub-modes are provided for different deceleration rates, then adaptability is improved, but device complexity increases
Solution Approach 1:
The system performs self-service by automatically selecting the appropriate sub-mode based on detected driving conditions. The electronic controller autonomously determines whether to apply strong or gentle deceleration based on lead vehicle detection, eliminating the need for manual mode selection and reducing operational complexity.
Data Source
AI summary
A pedal control system for an electric vehicle includes a pedal, a first switch, a second switch, and an electronic controller. The pedal is configured to be operated in a first mode or a second mode. The first mode does not include regenerative braking and the second mode includes regenerative braking. The second mode includes a plurality of sub-modes. The first switch is configured to switch between the first mode and the second mode. The second switch is configured to select one of the plurality of sub-modes when the second mode is selected. The electronic controller is configured to control an operating mode of the pedal when the second mode is selected. Each of the plurality of sub-modes has a different rate of deceleration and regeneration.