One-Pedal Deceleration Control Aligned With Brake Intent
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Solution Overview
Problem
Existing vehicle control systems in one-pedal mode often result in unintentional deceleration changes when the vehicle speed changes, leading to an uncomfortable driving experience due to unintended deceleration rate adjustments.
Innovation Solution
A vehicle control system that uses a controller to manage deceleration levels based on vehicle speed and brake pedal operations, updating deceleration levels when the brake pedal is manipulated to ensure deceleration aligns with the driver's intention, by setting different deceleration levels for various speed ranges and adjusting these levels based on the brake pedal's operation, including its returning speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the deceleration rate is adjusted according to vehicle speed in one-pedal mode, then the deceleration control is optimized for different speed ranges, but the deceleration changes unintentionally against the driver's intention when the driver uses the brake pedal
Solution Approach 1:
The patent applies the Dynamics principle by making the deceleration control system adaptable based on detected driver intention. The system dynamically switches between automatic deceleration rate adjustment (when accelerator pedal is used) and manual brake control (when brake pedal is detected), allowing the control strategy to change based on real-time operating conditions while maintaining optimized deceleration performance
Solution Approach 2:
The patent implements Feedback by detecting brake pedal operation and using this information to determine driver intention. The control system continuously monitors brake pedal status and adjusts deceleration control accordingly - when brake pedal is detected as operated, the system overrides automatic speed-based deceleration adjustments to maintain the deceleration rate that matches the driver's intended braking action
2Reliability
If the deceleration level is updated based on brake pedal operation, then the deceleration aligns with driver's intention, but the system complexity increases due to additional detection and control logic
Solution Approach 1:
The patent applies Universality by using the existing brake pedal detection capability for a new purpose - determining driver intention to override automatic deceleration control. The brake pedal sensor serves dual functions: normal braking activation and driver intention detection for deceleration level updates, eliminating the need for separate detection hardware while improving deceleration accuracy
Solution Approach 2:
The patent implements Parameter changes by modifying the deceleration level parameter based on brake pedal operation detection. When the brake pedal is detected as operated, the system changes the deceleration control parameter from automatic speed-based adjustment to manual driver-intention-based control, ensuring accurate deceleration response without requiring complex additional control mechanisms
Data Source
AI summary
A vehicle control system configured to control deceleration of a vehicle properly according to a driver's intention in one-pedal mode. In the one-pedal mode, a controller controls deceleration of the vehicle based on a deceleration level set in accordance with a speed of the vehicle. If the brake pedal is manipulated to decelerate the vehicle while the vehicle is operated in the one-pedal mode and an operating amount of an accelerator pedal falls within the decelerating range, the controller updates the deceleration level based on an operation of the brake pedal.