Autonomous Trunk Door Control With Door-Unlock Gating
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Solution Overview
Problem
During autonomous driving, the opening/closing action of a trunk door may occur at unexpected timings for the vehicle user, causing inconvenience.
Innovation Solution
A vehicle platform with an autonomous driving system that includes a vehicle control interface box to manage trunk door operations only when the entrance door is unlocked, allowing the user to anticipate the action and includes conditions for activating or reversing the trunk door operation based on specific commands and durations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the autonomous driving system activates the trunk door automatically during autonomous driving, then the trunk door can be opened/closed without user intervention, but the trunk door may activate at timing unexpected by the user
Solution Approach 1:
The system checks whether the entrance door is unlocked before accepting trunk operate commands. This preliminary condition check ensures that the trunk door is only activated when the user is likely to be present and anticipating the action, thereby maintaining user expectation while enabling automated operation.
2Speed
If the vehicle accepts trunk operate commands continuously, then the trunk door can be activated quickly when needed, but erroneous activation due to noise or interference may occur
Solution Approach 1:
The system requires that a trunk operate command be received and held for a predetermined period (e.g., 1 second) before activating the trunk door. This preliminary time-based verification filters out transient noise or erroneous signals while still enabling quick response to legitimate user commands.
Solution Approach 2:
The system continuously monitors the trunk operate command status and only triggers activation when the command persists for the predetermined period. This feedback mechanism ensures that activation occurs only when there is sustained intent, reducing erroneous activation while maintaining responsiveness.
3Reliability
If the trunk door activation is restricted to when the entrance door is unlocked, then erroneous activation is prevented, but the trunk door cannot be activated when the user is not present
Solution Approach 1:
The system applies different acceptance conditions for trunk operate commands based on the local state of the entrance door. When the entrance door is unlocked, the system accepts trunk commands; when locked, it does not. This localized condition-based approach ensures activation only when the user is likely present, balancing reliability with appropriate adaptability.
Data Source
AI summary
A body system determines whether or not entrance doors of all seats or entrance doors of rear seats are unlocked. When determination as YES is made, the body system determines whether or not a trunk operate command received by a VCIB from an ADK (ADS) indicates an “Open/Close Request” for a trunk door. When determination as YES is made, the body system determines whether or not it keeps receiving the “Open/Close Request” for one second. When determination as YES is made, the body system starts an action of the trunk door.