Curve Speed Control Based on Steering Wheel Grip State
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Solution Overview
Problem
Existing vehicle travel control devices do not adequately account for the occupant's comfort and contribute insufficiently to the development of sustainable transportation systems by failing to provide appropriate information based on the driver's gripping state of the steering wheel during curve travel.
Innovation Solution
A control device and method that adjusts vehicle speed on curved roads based on whether the driver is gripping the steering wheel, allowing the vehicle to travel at higher speeds when the wheel is gripped and lower speeds when it is not, with specific speed adjustments determined by processor-executed computer-readable instructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated speed control maintains a set speed during curve travel, then productivity is improved, but occupant comfort deteriorates when the driver is not gripping the steering wheel
Solution Approach 1:
The control device dynamically adjusts the vehicle speed based on the driver's steering wheel gripping state. When the driver is gripping the steering wheel, the vehicle maintains the set speed; when the driver is not gripping, the vehicle reduces speed to a lower value. This dynamic adjustment resolves the contradiction by making the speed control adaptive to the driver's state, improving comfort without sacrificing productivity when appropriate.
Solution Approach 2:
The system changes the speed parameter based on the driver's gripping state. The target speed is set to a first value when the driver is gripping and a second (lower) value when not gripping. This parameter change approach allows the system to maintain high productivity when the driver is engaged while ensuring comfort when the driver is not gripping, thus resolving the technical contradiction.
2Productivity
If the vehicle travels at high speed on curved roads, then productivity is improved, but safety deteriorates when the driver is not gripping the steering wheel
Solution Approach 1:
The control device makes the vehicle speed dynamic based on the driver's gripping state. When the driver is not gripping the steering wheel during curve travel, the system automatically reduces the speed to a lower value, enhancing safety. When the driver is gripping, the system maintains the higher set speed for productivity. This dynamic response resolves the safety-productivity contradiction.
Solution Approach 2:
The control device continuously monitors the driver's steering wheel gripping state and uses this feedback to adjust the vehicle speed accordingly. The detection unit detects whether the driver is gripping the steering wheel, and based on this feedback, the control unit adjusts the target speed appropriately. This feedback mechanism ensures safety by reducing speed when the driver is not gripping, while maintaining productivity when the driver is engaged.
3Ease of operation
If the system provides information about steering wheel gripping proposals, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control device integrates multiple functions into a single system: it detects the driver's gripping state, determines the appropriate target speed based on this state, controls the vehicle speed accordingly, and provides information to the driver. By making the control device universal and multi-functional, the system improves ease of operation without requiring separate complex subsystems, thus resolving the contradiction between information provision and device complexity.
Data Source
AI summary
A control device acquires a target speed during traveling on a curved road located in front of a vehicle, determines whether or not a speed of the vehicle or an object speed is less than or equal to a predetermined value with respect to the target speed, wherein the object speed is a set speed of automated speed control for automatically controlling the speed of the vehicle, and suppresses a process of causing an output device to output information indicating a proposal for gripping a steering wheel of the vehicle to a driver of the vehicle when the object speed is less than or equal to the predetermined value with respect to the target speed.