Vehicle Door Detection Unit Power Segmentation for Remote Start
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Solution Overview
Problem
Existing vehicle door opening/closing systems fail to allow users to open doors when the vehicle's engine is started remotely, as the detection unit is unable to detect the user's presence due to the engine's operation state.
Innovation Solution
A vehicle door opening/closing device with a mobile device that transmits request signals for locking/unlocking and starting the engine, a detection unit that contactlessly detects user presence, an authentication unit for communication, and a power mode changeover switch that allows the detection unit to operate independently of the engine's state, enabling door opening even when the engine is started remotely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the engine is started remotely using a mobile device, then the engine can be driven to energize in-vehicle electric components, but the detection unit cannot detect the user's foot because the system recognizes an occupant is in the vehicle
Solution Approach 1:
The system segments the power supply control into distinct modes: remote start mode (where engine can be started without ACC power to detection unit) and normal operation mode (where ACC power is required). This segmentation allows the detection unit to operate independently during remote start, resolving the contradiction between remote start capability and detection accuracy.
Solution Approach 2:
The system dynamically adjusts the power supply state of the detection unit based on the engine start method. When remote start is detected, the system maintains detection unit operation; when normal start is detected, the system cuts power to prevent false detection. This dynamic adaptation resolves the contradiction by making the system behavior context-dependent.
2Adaptability or versatility
If the detection unit operates continuously to detect user presence, then door opening is enabled, but false detection occurs when engine is running with no occupant
Solution Approach 1:
The system uses feedback from the engine start detection mechanism to control detection unit operation. When remote start is detected, feedback signals maintain detection unit operation; when normal start is detected, feedback signals disable the detection unit. This feedback loop resolves the contradiction by using system state information to dynamically control detection behavior.
Solution Approach 2:
The system changes the operational parameter (power supply state) of the detection unit based on the engine start method. During remote start, the detection unit remains powered and operational; during normal start, it is powered down. This parameter change resolves the contradiction between maintaining door opening functionality and preventing false detection.
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
Enables users to open doors using the detection unit even when the engine is started remotely, maintaining security through authentication communication and ensuring the detection unit can operate in standby or non-operation states as needed.
Implementation Method 1
a detection unit provided on the vehicle and configured to contactlessly detect the presence of a user located near the door
Data Source
AI summary
In a state that an engine is started up by using a mobile device from outside a vehicle, a power mode changeover switch is switched from a fixed contact OFF to a fixed contact START while avoiding a fixed contact ACC and a fixed contact ON, and the power mode changeover switch is maintained at the fixed contact START even after the engine is placed in an operation state. When an electric power is not supplied through the fixed contact ACC, a detection unit places itself in a state in which a detection operation is possible, and when the electric power is supplied, the detection unit places itself in a detection operation prohibition state.