Vehicle Wake Control Using Park-and-Zero-Speed Validation

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Solution Overview

Problem

Existing vehicles with autonomous driving kits may change power modes inappropriately due to incorrect commands from the autonomous driving kit, leading to potential malfunctions.

Innovation Solution

A vehicle platform that includes a vehicle control interface box to communicate with both base vehicle and autonomous driving kit control devices, transitioning to a wake mode only when the shift lever indicates parking and vehicle speed is 0 km/h, ensuring appropriate power mode changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If the power mode is changed based on a command from the autonomous driving kit, then the autonomous driving function can be activated, but the vehicle may transition to wake mode inappropriately due to incorrect commands from the autonomous driving kit

Engineering Contradiction:

Improveautonomous driving activationVSAvoidpower mode transition reliability

Core Design Contradiction:

Extent of automationVSReliability

Solution Approach 1:

The vehicle control interface box checks the current vehicle state (shift lever position and vehicle speed) before executing the wake command from the autonomous driving kit. This feedback mechanism ensures that power mode transitions only occur when appropriate conditions are met (parking gear and zero speed), preventing inappropriate transitions due to incorrect commands while maintaining autonomous driving functionality

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The vehicle control interface box acts as an intermediary between the autonomous driving kit and the power supply system. It receives wake commands from the autonomous driving kit but mediates their execution by verifying vehicle state conditions first, thus preventing direct and potentially incorrect power mode transitions while enabling legitimate autonomous driving activation

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If the vehicle transitions to wake mode immediately upon receiving a wake command, then the response time is fast, but the vehicle may experience malfunctions due to inappropriate power mode changes

Engineering Contradiction:

Improvepower mode transition speedVSAvoidvehicle operation reliability

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The vehicle control interface box performs preliminary checks of the shift lever position and vehicle speed before transitioning to wake mode. This preliminary action ensures that the vehicle is in a safe state (parking gear and stopped) before activating power modes, preventing malfunctions while maintaining relatively fast transition speeds when conditions are met

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12472952B2Vehicle including a vehicle platform that transitions to a wake mode according to a wake command

Publication Date: 2025.11.18 TOYOTA JIDOSHA KK

AI summary

The vehicle includes a vehicle platform configured to be capable of receiving commands related to autonomous driving from the autonomous driving kit. The autonomous driving kit is configured to transmit a wake command to the vehicle platform requesting transition of the power mode of the vehicle platform to the wake mode. The vehicle platform transitions to the wake mode by the wake command only when the shift lever indicates parking and the vehicle speed is 0 km/h.