Vehicle Idle Stop Notification Timing Control
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Solution Overview
Problem
Existing vehicle idle stop systems may fail to effectively notify drivers of the need to stop the engine due to short elapsed times between support information notification and brake pedal release, leading to potential misrecognition of the support information.
Innovation Solution
Implement a system where support information is notified to the driver either after a predetermined time has elapsed since vehicle stop or prior to this time when the brake operation decreases, using a vehicle information providing device with an idle stop control unit and information notification unit that manages the display of support information based on brake pedal operation and vehicle stop conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If support information notification is stopped when the driver operates to release the brake pedal, then notification suppression is improved, but the support information may not be recognized by the driver when the time elapsed is short
Solution Approach 1:
The notification control unit starts notifying support information before the driver releases the brake pedal, specifically when the brake operation amount decreases while the vehicle is stopped. This preliminary action ensures the driver has sufficient time to recognize the support information before the notification is stopped, resolving the contradiction between notification suppression and information recognition.
2Loss of energy
If support information is notified only after a predetermined time has elapsed since vehicle stop, then unnecessary notifications are reduced, but the driver may miss the support information when the time between vehicle stop and brake release is short
Solution Approach 1:
The notification timing is made dynamic rather than fixed. The notification control unit determines when to notify support information based on real-time brake operation amount and vehicle stop conditions. When the brake operation amount decreases during a vehicle stop, the system notifies support information, adapting the notification timing to the driver's actual behavior rather than using a predetermined fixed time delay.
3Loss of information
If the notification control unit continuously notifies support information, then information recognition is improved, but notification suppression deteriorates
Solution Approach 1:
The notification control unit uses feedback from the brake operation amount sensor and vehicle stop detection to control notification timing. The system continuously monitors brake operation and vehicle stop conditions, and only notifies support information when specific conditions are met (vehicle is stopped and brake operation amount decreases), thereby avoiding unnecessary notifications while ensuring timely information delivery.
Data Source
AI summary
In an information providing method for a vehicle, an engine is stopped automatically when a predetermined permission condition is satisfied in a state in which the vehicle is stopped by a brake operation executed by a driver. The permission condition is a brake operation amount of a brake having reached a predetermined brake operation amount. The driver is notified of support information prompting the driver to increase the brake operation amount when the permission condition is not satisfied after a predetermined time has elapsed since the vehicle was stopped. A braking force capable of maintaining a vehicle stop state is generated by a vehicle stop keeping control. The driver is notified of the support information when the brake operation amount decreases before the predetermined time has elapsed in a state in which the vehicle has been stopped by the brake operation and the vehicle stop keeping control is executed.