Vehicle Control System Transition Mode Notification

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Solution Overview

Problem

Existing vehicle control systems fail to notify drivers of the reason for switching from automatic or manual driving modes to a transition mode, leading to confusion and potentially unsafe driving practices.

Innovation Solution

A vehicle control system that includes an electronic control unit and notification device to inform drivers of the reason for switching to a transition mode based on vehicle or occupant states, with optional adjustments in notification style based on driver familiarity with the automatic driving mode.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the system switches to transition mode based on vehicle state, then the driving safety is improved, but the driver's understanding of the situation deteriorates due to lack of notification about the switching reason

Engineering Contradiction:
Improvedriving safetyVSAvoiddriver understanding
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

The notification device provides feedback to the driver about the reason for mode switching by displaying information about the vehicle state that triggered the transition from automatic to transition mode. This feedback loop ensures the driver understands why the system is requesting their attention, resolving the information loss while maintaining safety improvements.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The notification device acts as an intermediary between the electronic control unit and the driver. It translates the internal vehicle state data into comprehensible notifications that explain the reason for mode switching, bridging the gap between system decisions and driver understanding.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Loss of information

If the system provides detailed notification about mode switching reason, then the driver understanding is improved, but the device complexity increases due to additional notification functions

Engineering Contradiction:
Improvedriver understandingVSAvoidsystem complexity
Core Design Contradiction:
Loss of informationVSDevice complexity

Solution Approach 1:

The notification device performs multiple functions: it not only notifies the driver of mode switching but also provides the reason for switching by displaying vehicle state information. This multi-functionality approach avoids adding separate components, reducing overall system complexity while improving driver understanding.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The notification function and the reason-providing function are merged into a single notification device. Instead of having separate systems for alerting drivers and for displaying vehicle state information, the patent combines these functions, simplifying the overall device architecture.

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS10449970B2Vehicle control system
Publication Date: 2019.10.22 TOYOTA JIDOSHA KK
  • US10449970B2 patent drawing
  • US10449970B2 patent drawing
  • US10449970B2 patent drawing

AI summary

A vehicle control system is configured to switch a driving mode of a vehicle among an automatic driving mode, a transition mode, and a manual driving mode. The vehicle control system includes: a notification device and an electronic control unit. The notification device is configured to notify the driver of information. The electronic control unit is configured to recognize a vehicle state of the vehicle, and notify, by using the notification device, the driver of a reason for switching the driving mode to the transition mode, when the driving mode is switched from the automatic driving mode or the manual driving mode to the transition mode based on the vehicle state.