Vehicle Seat Walk-In Control for Erroneous Switch Filtering
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Solution Overview
Problem
Passengers in third-row seats often erroneously operate the walk-in switch during exit, causing the second-row seat to return, leading to potential injury from collision with the door or seat.
Innovation Solution
A method to control walk-in operations by determining the number of switch signal generations and signal duration, ensuring the operation only stops when intended by the user, preventing erroneous operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the walk-in switch is positioned at the upper end of the seatback for easy operation by third-row passengers, then the ease of operation is improved, but the risk of erroneous operation during disembarking increases
Solution Approach 1:
The seat controller monitors the operational state of the walk-in function and uses this feedback to determine whether a switch signal should be responded to. By checking if the seat is currently in walk-in mode before responding to a switch signal, the system provides contextual feedback that prevents erroneous operations during disembarking while maintaining easy access to the switch.
Solution Approach 2:
The system dynamically adjusts its response to switch signals based on the current operational state. When the walk-in function is active, the controller ignores additional signals to prevent harmful return operations. When the function is inactive, normal switch operation is enabled. This dynamic state-dependent behavior resolves the contradiction between accessibility and safety.
2Speed
If the seat controller responds to every walk-in switch signal during operation, then the responsiveness is improved, but the safety deteriorates due to potential return operations during disembarking
Solution Approach 1:
The controller continuously monitors the operational state of the walk-in function and uses this feedback to intelligently filter switch signals. When the seat is already in walk-in mode, the controller recognizes this feedback and suppresses responses to additional signals, preventing harmful return operations. This selective responsiveness maintains safety while preserving necessary functionality.
Solution Approach 2:
The seat controller acts as an intermediary between the walk-in switch and the drive mechanism. It mediates by intercepting switch signals and determining whether they should be transmitted to the motor based on current operational state. This intermediary function filters out harmful signals during disembarking while allowing legitimate operation signals to pass through.
3Adaptability or versatility
If the second-row seat returns to initial position during walk-in operation, then the walk-in function flexibility is improved, but the harmful effect of jamming passengers between door and seat increases
Solution Approach 1:
The system applies preliminary anti-action by preventing the return operation before it can occur. The controller detects when the seat is in walk-in mode and proactively blocks any switch signals that would trigger a return operation. This preemptive measure eliminates the harmful effect of jamming passengers while preserving the flexibility of the walk-in function for legitimate use cases.
Data Source
AI summary
The present invention relates to a method of controlling a walk-in operation of a vehicle seat, which determines whether a walk-in switch 70 erroneously operates in consideration of the number of times the signal is generated and a signal filtering time when an operation signal of the walk-in switch 70 is generated during a walk-in operation or a walk-in return operation of a seat, continuously performs the walk-in operation or the walk-in return operation in case of an erroneous operation, and stops the walk-in operation or the walk-in return operation only in case of a normal operation according to a user's intention.