Cargo Compartment Door Control Using Digital Key Proximity

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Solution Overview

Problem

Existing vehicle door control systems for chassis-cab platform-based vehicles do not effectively utilize digital keys to automate the opening and closing of cargo compartment doors based on user proximity and vehicle conditions, leading to user inconvenience.

Innovation Solution

A vehicle door control method using short-range communication between a digital key and a mobile device to detect user proximity, determine cargo compartment presence, and automate door operations such as opening, closing, locking, and unlocking based on predefined conditions and flag values, with notifications to the user via the mobile device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If manual door control is used in chassis-cab vehicles, then system complexity is low, but user convenience and automation level are poor

Engineering Contradiction:

Improvedoor automation controlVSAvoidcontrol system complexity

Core Design Contradiction:

Extent of automationVSDevice complexity

Solution Approach 1:

The door control system operates autonomously by detecting user proximity through digital key signals and automatically executing door opening/closing operations without requiring manual intervention. The system serves itself by monitoring its own state (door position, vehicle motion) and making control decisions based on predefined conditions.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control system integrates multiple functions including proximity detection via digital key, door state monitoring, vehicle motion detection, and automated control execution within a single unified system, allowing one system to perform multiple door-related operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If digital key proximity detection is implemented, then user convenience is improved, but communication system requirements and energy consumption increase

Engineering Contradiction:

Improvedoor operation convenienceVSAvoidcommunication energy consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

The system performs periodic proximity detection by continuously monitoring digital key signals at predetermined intervals rather than maintaining constant active communication. This periodic approach reduces energy consumption while still providing responsive door control when the user approaches or leaves the vehicle.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system replaces traditional mechanical key insertion or physical door handling with wireless digital key communication, eliminating mechanical wear and reducing the energy required for physical manipulation while maintaining secure access control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Measurement precision

If comprehensive door control conditions are monitored (vehicle motion, door state, proximity), then control accuracy is improved, but system complexity and detection requirements increase

Engineering Contradiction:

Improvedoor control condition detectionVSAvoidmulti-parameter detection difficulty

Core Design Contradiction:

Measurement precisionVSDifficulty of detecting and measuring

Solution Approach 1:

The control system divides the overall door control function into separate detection modules: proximity detection (digital key signal), door state detection (open/closed position), and vehicle motion detection (moving/stopped status). Each module independently monitors its specific parameter and feeds information to the central control logic.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control system uses intermediate flag values as mediators to simplify the integration of multiple detection conditions. Each detection condition sets or clears specific flags, and the control logic makes decisions based on the combination of flag states, reducing the complexity of direct multi-parameter evaluation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Provides automated and convenient door control in chassis-cab platform-based vehicles, allowing doors to be automatically managed based on user behavior with a digital key, enhancing user experience without direct interaction.

Implementation Method 1

detecting whether a digital key is away from the vehicle by a predetermined distance or more via communication between a short range communication terminal provided in the vehicle and a mobile device used by a user of the vehicle as a digital key

Methodology Applied

Scientific EffectElectromagnetic radiation: Electromagnetic Induction

Data Source

PatentUS20250368161A1Method of controlling vehicle door

Publication Date: 2025.12.04 HYUNDAI MOTOR CO LTD

AI summary

A method of controlling a door of a cargo compartment mounted at the rear of a cab includes detecting whether a digital key is away from the vehicle by a predetermined distance or more via communication between a short range communication terminal provided in the vehicle and a mobile device used by a user of the vehicle as a digital key, setting a flag value when the digital key is away from the vehicle by the predetermined distance or more, and determining whether the cargo compartment is mounted at the rear of the cab, When it is determined that the cargo compartment is mounted at the rear of the cab, and when it is determined that the vehicle is stopped, the door is in the open state, and the flag value is set, closing the door. The method further includes notifying the user whether the door is closed.