Portable Device Automated Driving System Power Management
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Solution Overview
Problem
The existing automated driving systems face challenges in efficiently managing vehicle travel conditions when a portable device cooperates with a travel control device, leading to increased power consumption and potential disruptions in vehicle control.
Innovation Solution
An automated driving system that includes a travel control device and a portable device, where the portable device transmits route data to the travel control device, sets event locations for changing travel conditions, and notifies the driver of these changes, while ignoring operational inputs to stop cooperation if within an automated-driving control area, and requests cooperative operation if not already performed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the portable device cooperates with the travel control device to automatically drive the vehicle, then the automated driving function is enhanced, but the power consumption of the portable device increases
Solution Approach 1:
The system performs preliminary actions by pre-setting event locations along the route and pre-notifying the driver of upcoming travel condition changes. This allows the automated driving to be enhanced without requiring continuous high-power processing, as the system prepares information in advance and only activates full cooperation when necessary.
Solution Approach 2:
The portable device cooperates with the travel control device in a periodic manner rather than continuously. The device transmits route data, receives event location information, and provides notifications at specific intervals or trigger points along the route, reducing overall power consumption while maintaining automated driving functionality.
2Use of energy by moving object
If the portable device stops the cooperative operation to save power, then the power consumption is reduced, but the automated driving control may be disrupted
Solution Approach 1:
The system incorporates feedback mechanisms where the portable device receives notification data from the travel control device about event locations and travel condition changes. This feedback loop allows the device to understand when automated driving control is active and make informed decisions about when to stop cooperation to save power without disrupting critical control functions.
Solution Approach 2:
The portable device autonomously determines when to stop or continue cooperative operation based on its own power status and the current driving context. The device can independently decide to suspend non-critical functions while maintaining essential automated driving control, achieving self-service power management without external intervention.
3Loss of information
If the portable device notifies the driver of travel condition changes, then the driver is informed, but the device complexity increases
Solution Approach 1:
The portable device acts as an intermediary between the travel control device and the driver. It receives notification data from the travel control device and presents it to the driver in an understandable format, simplifying the information flow and reducing the complexity burden on either end system while ensuring the driver is properly informed of travel condition changes.
Data Source
AI summary
The automated driving system automatically drives a vehicle by cooperative operation of a travel control device controlling travel of the vehicle and a portable device possessed by a driver of the vehicle. In the cooperative operation, the portable device transmits route data to the travel control device; the travel control device sets an event location on the route, based on the route data, controls travel of the vehicle in an automated-driving control area, based on the route data and circumstance data, and transmits notification data for notifying the driver of a change of a travel condition to the portable device; and the portable device notifies the driver of the change, based on the notification data. Upon receiving an operational input to stop the cooperative operation, the portable device notifies the driver of a warning message or ignores the received operational input if the event location is set in the area.