Vehicle Latch Controller Neutral Switch Position Detection
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Solution Overview
Problem
Existing vehicle opening/closing body controllers face challenges in executing reversing control of the pivot member after closing and releasing actions, particularly in accurately determining the pivot position to prevent unintended reversing actions.
Innovation Solution
A vehicle opening/closing body controller with a lock device and a controller that uses neutral switches to detect the pivot position of the pivot member, preventing reversing control when the pivot member is in the neutral range, and employing time-measuring counters to manage reversing actions based on the vehicle's state, ensuring safe and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reversing control is executed after closing control to return the pivot member to neutral position, then the latch mechanism can be prepared for next operation, but unintended reversing actions may occur when the pivot member is already in or near the neutral range
Solution Approach 1:
The position detector determines the pivot position before executing reversing control. If the pivot member is already in the neutral range, the reversing controller prevents execution of reversing control. This preliminary check avoids unintended reversing actions while ensuring the system is ready for next operation.
Solution Approach 2:
The neutral switch provides feedback on the pivot member's position to the position detector. This feedback mechanism enables the reversing controller to make informed decisions about whether to execute reversing control, preventing harmful unintended actions while maintaining reliable operation preparation.
2Device complexity
If a single neutral switch is used to detect pivot position, then the device complexity is reduced, but detection accuracy and reliability deteriorate due to inability to detect anomalies
Solution Approach 1:
The patent applies different functional qualities to different parts of the detection system. The first neutral switch detects normal pivot position changes, while the second neutral switch specifically monitors for anomaly conditions. This localized functional differentiation improves detection accuracy without significantly increasing overall system complexity.
Solution Approach 2:
The system changes the detection parameter by using two neutral switches with different monitoring functions. The first switch monitors normal operation ranges while the second switch monitors for anomaly conditions. This parameter differentiation enables more accurate pivot position detection and anomaly identification.
3Productivity
If reversing control is executed without checking pivot position, then the operation speed is improved, but the operational safety deteriorates due to potential unintended movements
Solution Approach 1:
The position detector performs a preliminary check of the pivot position before the reversing controller executes reversing control. This preliminary action ensures that reversing control is only executed when appropriate, preventing unintended movements while maintaining efficient operation through rapid position assessment and decision-making.
Data Source
AI summary
An opening/closing body control device for vehicles that comprises a lock device and a control device. The control device comprises: a reverse control unit that executes reverse control that rotates a rotating member in reverse, after closing control has been completed; and a position detection unit that detects the rotation position of the rotating member, on the basis of the on/off state of a neutral switch. The position detection unit is capable of detecting whether the rotation position of the rotating member is in a closed area, a release area, or a neutral area. The reverse control unit does not execute reverse control if the rotation position of the rotating member is in the neutral area, when the closing control has been completed.