Vehicle Door Controller Reversal Logic for Trapping Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vehicle opening/closing body control devices may lead to false user perceptions of the opening/closing body being fully closed when a foreign object is trapped, causing incomplete locking and potential re-trapping issues.
Innovation Solution
A vehicle opening/closing body control device that includes an opening/closing drive device, a position detector, a trapping detector, and a controller, which reverses and stops the opening/closing body at a predetermined distance to prevent re-trapping and ensure sufficient opening, thereby reducing false perceptions of a fully closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening/closing body is reversed by a predetermined distance when trapping is detected, then re-trapping is restrained, but the opening/closing body may stop in the vicinity of the fully closed position causing false user perception
Solution Approach 1:
The controller monitors the position of the opening/closing body during reversal operation and provides feedback to determine when to stop. When the body exits the specified range from the fully closed position, the controller stops the reversal, preventing false perception while ensuring re-trapping prevention. This feedback-based position control resolves the contradiction by dynamically adjusting the reversal distance based on real-time position information.
Solution Approach 2:
The system preliminarily determines a specified range from the fully closed position before reversal occurs. By pre-defining this safety zone, the system ensures that reversal operations will not cause the body to stop in a position that creates false user perception, while still maintaining effective re-trapping prevention through controlled reversal within acceptable parameters.
2Loss of information
If the opening/closing body is reversed to ensure sufficient opening distance, then user perception accuracy is improved, but the operation time increases
Solution Approach 1:
The system applies partial reversal action by reversing the opening/closing body only enough to exit the specified range from the fully closed position, rather than reversing to a fixed predetermined distance. This partial action ensures sufficient opening distance for accurate user perception while minimizing unnecessary reversal distance, thereby reducing operation time.
Data Source
AI summary
A vehicle opening and closing body control device includes an opening and closing drive device and a controller. When the opening and closing body is being closed, in a case where the position of the opening and closing body when a trapping of a foreign object is detected is outside a specified range between a fully closed position and a specified position, the controller controls the operation of the opening and closing drive device to reverse the opening and closing body to perform the opening operation by a predetermined opening-and-returning distance and then stop the opening and closing body. In a case where the position of trapping is in the specified range, the controller reverses the opening and closing body to perform the opening operation by the predetermined opening-and-returning distance or a greater distance and then stop the opening and closing body outside the specified range.