Curve-Entry Vehicle Control Using Lateral Acceleration Deceleration Mapping
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Solution Overview
Problem
Existing vehicle control systems cause unnatural sensations for drivers when releasing the brake pedal and depressing the accelerator while turning, due to inadequate control of deceleration.
Innovation Solution
A vehicle control device that includes an accelerator pedal, a brake pedal, and a detection unit, which sets deceleration based on lateral gravitational acceleration to optimize the sense of deceleration during turns, using a pre-determined map relating lateral and front-rear gravitational acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle control system intervenes in driver operations to decelerate the vehicle when entry speed to a curve is predicted to be excessively great, then the vehicle safety is improved, but the driver experiences an unnatural sensation due to the sense of deceleration when releasing the brake pedal and depressing the accelerator pedal while turning
Solution Approach 1:
The patent applies parameter changes by adjusting the deceleration parameter based on lateral gravitational acceleration. When the driver releases the brake pedal and depresses the accelerator during a turn, the control unit sets the deceleration according to the detected lateral gravitational acceleration, thereby modifying the deceleration parameter dynamically to match the vehicle's turning state and eliminate the unnatural sensation
Solution Approach 2:
The patent implements feedback by using the detection unit to continuously monitor the vehicle's traveling state and driver operations, then feeding this information back to the control unit. The control unit adjusts the deceleration control based on the detected lateral gravitational acceleration and pedal operation status, creating a closed-loop control system that adapts to real-time driving conditions
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
The device effectively suppresses unnatural sensations for the driver by enabling optimal control of deceleration when switching from the brake to the accelerator pedal during turns, improving the driving experience.
Implementation Method 1
deceleration of the vehicle is set in accordance with a lateral gravitational acceleration of the vehicle detected by the detection unit at time of releasing the brake pedal
Data Source
AI summary
A vehicle control device includes: an accelerator pedal operated by a driver; a brake pedal operated by the driver to activate a braking device; and a detection unit that detects data related to an operation state of a vehicle by the driver, and a traveling state of the vehicle. The vehicle control device is configured to enable acceleration by the driver operating the accelerator pedal, and to enable braking by the driver operating the brake pedal. When the driver releases the brake pedal and depresses the accelerator pedal in a process of decelerating the vehicle at an entrance of a curve and then accelerating the vehicle while turning in the curve, deceleration of the vehicle is set in accordance with a lateral gravitational acceleration of the vehicle detected by the detection unit at time of releasing the brake pedal.