Single-Pedal Parking Control for Smooth EV Stopping
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Solution Overview
Problem
Existing new-energy vehicle technologies lack an effective strategy for deceleration control in single-pedal mode, which affects energy utilization and driving experience.
Innovation Solution
A method and device for parking control in single-pedal mode, utilizing a vehicle controller to coordinate the motor controller and electronic handbrake for smooth deceleration and parking, based on predefined conditions and driver intent recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the driver manually operates the brake pedal to prevent the vehicle from sliding down a slope during parking, then the vehicle stability is improved, but the driver's operation complexity and physical effort increase
Solution Approach 1:
The parking brake system automatically activates and maintains braking force without requiring continuous driver input. The system self-regulates the brake pedal position based on vehicle state and slope conditions, eliminating the need for manual pedal holding while maintaining vehicle stability on slopes.
Solution Approach 2:
The system continuously monitors vehicle state (acceleration, brake status, gear position) and automatically adjusts brake pedal position accordingly. This closed-loop feedback mechanism detects when braking intervention is needed and applies appropriate force, replacing manual driver judgment and adjustment with automated sensor-based control.
2Stability of the object's composition
If the brake pedal is held at a fixed position to maintain braking force, then the vehicle remains stable on slopes, but the braking system cannot respond to changing road conditions or vehicle states
Solution Approach 1:
The brake pedal position is dynamically adjusted based on real-time vehicle conditions including acceleration G-values, brake status, and gear position. The system transitions from static fixed-position braking to dynamic adaptive braking, automatically modifying pedal position to match changing road slopes, vehicle loads, and driving conditions.
Solution Approach 2:
The system changes the brake pedal position parameter according to detected vehicle state and road conditions. By varying the pedal position based on acceleration data and brake status, the system adapts braking force to match actual requirements, enabling response to changing conditions while maintaining stability.
3Device complexity
If no brake pedal operation is detected, then the system remains in normal state, but the vehicle may slide on slopes without automated braking intervention
Solution Approach 1:
The system proactively detects parking intent through acceleration G-value analysis and gear position monitoring, and automatically applies braking force before the driver would manually intervene. This preliminary automated action prevents vehicle sliding on slopes by anticipating parking scenarios and activating brake control in advance.
Solution Approach 2:
The system replaces manual mechanical brake pedal operation with automated electronic control based on sensor inputs (acceleration, gear position, brake status). This substitution of mechanical driver action with electronic detection and control enhances reliability while maintaining acceptable system complexity through integration with existing vehicle sensors.
Data Source
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AI summary
The present application relates to the field of new-energy vehicle technology, and provides a method and a device for parking control, a vehicle controller, and a new-energy vehicle. The method for parking control provided in the present application includes the following steps: determining whether a single-pedal mode is activated; determining whether conditions for deceleration control are met when the single-pedal mode is activated; controlling the new-energy vehicle to decelerate when the conditions for deceleration control are met; determining whether conditions for sending a brake request to a motor controller are met during a process of controlling the new-energy vehicle to decelerate; sending the brake request to the motor controller when the conditions for sending a brake request to the motor controller are met; and sending a parking request to an electronic handbrake when the new-energy vehicle is in the brake mode and the speed of the new-energy vehicle is smaller than the third preset value for a third preset time, enable the new-energy vehicle to enter in a parking mode. The present application enables smooth stopping and parking of the vehicle in single-pedal mode.