Vehicle Door Controller Neutral Switch Segmentation for Reversing Control
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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, with existing solutions lacking reliability and accuracy in stopping reverse pivoting based on neutral switch states.
Innovation Solution
A vehicle opening/closing body controller that includes a lock device with a latch mechanism, utilizing first and second neutral switches to detect state changes and execute reversing control, with anomaly detection mechanisms to ensure accurate stopping of reverse pivoting and reliability in reversing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single neutral switch is used to detect pivot member position for reversing control, then the device complexity is reduced, but the reliability of reversing control deteriorates due to inability to detect anomalies
Solution Approach 1:
The single neutral switch is segmented into two separate neutral switches (first neutral switch and second neutral switch), each detecting different pivot positions. This segmentation allows independent monitoring of different states, improving reliability while maintaining manageable system complexity through modular detection points.
Solution Approach 2:
The controller compares the on/off states of both neutral switches to detect anomalies in reversing control. By implementing feedback through cross-monitoring of the two switches, the system can identify when one switch fails to change state properly, thereby detecting anomalies and improving overall reversing control reliability.
2Device complexity
If reversing control is executed without anomaly detection, then the device complexity is reduced, but the measurement precision of pivot member position deteriorates
Solution Approach 1:
The anomaly detection function is built into the existing neutral switch configuration without requiring additional sensors or measurement devices. By preliminarily establishing the comparison logic between the two neutral switches, the system achieves enhanced measurement precision using already-present components.
3Device complexity
If neutral switches are not used for stopping reverse pivoting, then the device complexity is reduced, but the reliability of reversing control deteriorates
Solution Approach 1:
The neutral switches serve dual functions: they detect pivot positions for control sequencing and simultaneously serve as the stopping mechanism for reverse pivoting. When a neutral switch changes state during reversing control, the controller stops the reverse pivoting action. This self-service approach eliminates the need for separate stopping mechanisms while improving reliability through the inherent position detection capability of the neutral switches.
Data Source
AI summary
This opening/closing body control device for vehicles comprises a lock device and a control device. The control device comprises: a reversal control unit; a reversal stopping unit; a first error detection unit that detects a first state change error in a first neutral switch, when reverse rotation of a rotating member has been stopped on the basis of a change in the on/off state of a second neutral switch during reverse control after closing control; and a second error detection unit that detects a second state change error in the first neutral switch, when reverse rotation of the rotating member is stopped on the basis of a change in the on/off state of the second neutral switch during reverse control after release control.