Vehicle Speed Control Restart After Driver Brake Hold
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Solution Overview
Problem
Conventional adaptive cruise control systems require manual intervention to restart automatic speed control after the vehicle is stopped, which can be inconvenient and disrupt the driving experience.
Innovation Solution
A control device with a travel control unit that interrupts speed control when the driver operates the braking element and a proposal unit that offers a restart option to the driver, allowing the speed control to resume automatically when the driver agrees by terminating the braking operation, using a simple operation to restart the speed control function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the speed control function is interrupted when the driver operates the braking element, then the driver can stop the vehicle manually, but the automatic speed control cannot resume automatically when the vehicle is stopped
Solution Approach 1:
The system automatically detects when the vehicle has stopped and the braking operation has ended, then autonomously restarts the speed control function without requiring additional driver input. The travel control unit monitors vehicle stop status and braking element state, and automatically reactivates speed control when conditions are appropriate, making the system self-serve the restart function.
Solution Approach 2:
The system continuously monitors the state of the braking operation element and vehicle stop status, using this feedback information to determine when to restart the speed control function. The proposal unit provides feedback to the driver about the restart status, and the travel control unit adjusts its operation based on whether the driver agrees or disagrees with the restart proposal.
2Productivity
If a button operation is required to restart speed control, then the control logic remains simple, but the driver experience is disrupted
Solution Approach 1:
The system prepares for automatic restart by monitoring vehicle stop status and braking element state in advance. When the vehicle stops and the braking operation ends, the system has already detected these conditions and can immediately restart the speed control function without waiting for driver action, thus maintaining continuity of control.
Solution Approach 2:
The speed control system automatically manages its own restart process by detecting appropriate conditions (vehicle stopped, braking operation ended) and autonomously reactivating the control function, eliminating the need for manual button operation and maintaining continuous productivity of the speed control system.
3Ease of operation
If the speed control restarts automatically when the vehicle is stopped, then convenience is enhanced, but the system must monitor additional conditions
Solution Approach 1:
The travel control unit performs multiple functions: it controls vehicle speed, monitors braking element operation, detects vehicle stop status, and manages the restart logic. By consolidating these monitoring and control functions into a single multi-functional unit, the system enhances ease of operation without proportionally increasing the difficulty of detecting and measuring, as the same hardware and software resources handle multiple tasks.
Data Source
AI summary
A control device for a vehicle includes a travel control unit configured to provide a speed control function for automatically controlling a speed and configured to interrupt an operation of the speed control function in response to a braking operation element of the vehicle being operated by a driver during the operation of the speed control function, and a proposal unit configured to provide a restart proposal to the driver to restart the operation of the speed control function when the driver stops the vehicle while the operation of the speed control function is interrupted. When the driver agrees with the restart proposal, the travel control unit restarts the operation of the speed control function and keeps the vehicle stopped by the speed control function. The agreement with the restart proposal is made by the driver terminating an operation of the braking operation element.