Vehicle Control Device for One-Pedal Braking Dynamics
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Solution Overview
Problem
Conventional single-pedal vehicle control systems compromise braking operability, leading to inadequate or excessive pedal operations, as drivers are unaccustomed to the unique operation of accelerating and decelerating with a single pedal.
Innovation Solution
A vehicle control device with a control unit that adjusts braking force based on the rate of change in pedal operation, featuring threshold values to manage braking force and damping suspension, along with attention-drawing announcements and lighting to enhance operability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single pedal is used for both acceleration and deceleration, then the number of pedals is reduced and vehicle control is simplified, but driver operability deteriorates and braking control becomes insufficient or excessive
Solution Approach 1:
The patent applies dynamics by making the braking force dynamically adjustable based on the rate of change of pedal operation amount. The control unit calculates the rate of change of pedal operation amount and adjusts braking force accordingly, allowing the braking system to adapt to different driving situations and driver intentions, thereby improving braking operability while maintaining single-pedal simplicity
Solution Approach 2:
The patent changes the parameter of braking force based on the rate of change of pedal operation amount. By monitoring how quickly the pedal operation amount changes and adjusting braking force as a corresponding parameter, the system provides more precise braking control, preventing both insufficient and excessive braking while maintaining the simplified single-pedal interface
2Speed
If braking force is increased in proportion to the rate of change of pedal operation, then braking responsiveness is improved, but the risk of excessive braking increases
Solution Approach 1:
The patent implements feedback by continuously monitoring the pedal operation amount and calculating its rate of change, then using this information to adjust braking force. This closed-loop control ensures that braking responsiveness is improved while maintaining control accuracy, as the system constantly adapts to the driver's input and prevents excessive braking through real-time adjustments
Data Source
AI summary
This vehicle control device is provided with: a control unit for executing one-pedal control, that is, the control for accelerating a vehicle when a single pedal is depressed from a predetermined reference point of a pedal stroke, and for decelerating the vehicle when the pedal is released from the reference point; and a determination unit for determining whether or not a rate of change in a pedal operation amount when the pedal is released is equal to or greater than a first threshold value. The control unit performs control for increasing a braking force when the rate of change is equal to or greater than the first threshold value.