Curve-Approach Vehicle Speed Control With Driver Intent Feedback
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Solution Overview
Problem
Conventional vehicle control systems often fail to accurately control vehicle acceleration according to the driver's intention, particularly in situations involving curved roads, leading to potential safety and convenience issues.
Innovation Solution
A vehicle control device that acquires information about curved roads and deceleration operations, implementing a deceleration control strategy with varying deceleration rates and overriding mechanisms to ensure the vehicle decelerates in accordance with the driver's intentions, preventing unintended deceleration overrides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle automatically decelerates before entering a curve to ensure safety, then the safety is improved, but the driver's intention to accelerate may be overridden causing inconvenience
Solution Approach 1:
The control unit continuously monitors the driver's acceleration operation amount and uses this feedback to determine whether to override the automatic deceleration control. When the driver's acceleration input exceeds a threshold, the system detects this intention and adjusts its behavior accordingly, allowing the vehicle to accelerate despite the curve approaching. This feedback mechanism resolves the contradiction by making the safety system responsive to driver intent rather than rigidly enforcing predetermined deceleration.
Solution Approach 2:
The system dynamically adjusts the deceleration control based on real-time driver input conditions. Instead of applying fixed deceleration rules, the control unit modulates the deceleration behavior according to the driver's acceleration operation amount, which changes over time. This dynamic adjustment allows the system to switch between safety-oriented deceleration and driver-intention-following acceleration modes, resolving the contradiction between safety and driver control.
2Reliability
If the vehicle decelerates at a higher rate near the curve entrance to ensure safe speed, then the safety is improved, but the deceleration may be excessive when the driver intends to maintain speed causing inconvenience
Solution Approach 1:
The control unit uses feedback from the driver's acceleration operation to modulate the deceleration rate. When the driver applies sufficient acceleration input, the system detects this as an intention to maintain or increase speed and reduces or cancels the automatic deceleration, even when approaching the curve. This feedback loop ensures that the deceleration rate adapts to driver intent rather than being fixed, resolving the contradiction between safety and driver control.
Solution Approach 2:
The system changes the deceleration parameter (deceleration rate) based on driver input conditions. Instead of applying a constant high deceleration rate near curve entrances, the control unit adjusts the deceleration parameter dynamically according to the driver's acceleration operation amount. When driver input exceeds a threshold, the deceleration parameter is reduced or set to zero, allowing the vehicle to maintain speed despite the approaching curve, thus resolving the contradiction.
Data Source
AI summary
A vehicle control device includes a hardware processor, in which the hardware processor executes a program stored in a storage device, thereby acquiring first information related to a curved road that is present in a traveling direction of a vehicle, acquiring second information including an amount of a deceleration operation of a driver of the vehicle, performing, as a deceleration control that causes the vehicle to decelerate so that a speed of the vehicle approaches a target speed based on the first information when the vehicle is traveling in a section from an entrance of the curved road to a predetermined distance before the entrance or on the curved road, a deceleration control that causes the vehicle to decelerate at a first deceleration rate when the vehicle has reached a start point of the section, and causes the vehicle to decelerate at a second deceleration rate greater than the first deceleration rate when the vehicle has approached further toward the entrance of the curved road, referring to the second information during execution of the deceleration control, and stopping the deceleration control when the amount of a deceleration operation is equal to or greater than a predetermined amount, and in which the predetermined amount is set to be equal to or greater than the second deceleration rate.