Vehicle Door Speed Control for Remote Operation Safety
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Solution Overview
Problem
Remote operation of open-close body driving devices in vehicles increases the risk of object entrapment or jamming due to the operator's inability to monitor the surroundings, leading to higher interference risks compared to normal operations.
Innovation Solution
An open-close body driving device with a controller that adjusts the movement speed based on the operation method, moving at normal speed when operated via vehicle switches and at slower speeds when operated remotely, with specific speed control patterns to reduce interference in the vicinity of the fully-closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the open-close body is moved at normal speed based on remote operating signal, then the operation efficiency is improved, but the risk of object entrapment or jamming increases
Solution Approach 1:
The patent applies dynamics by making the movement speed of the open-close body variable rather than fixed. The controller dynamically adjusts the speed based on the operating condition: using normal speed for vehicle-side operations and reduced speed for remote operations. This dynamic speed adjustment allows the system to maintain operational efficiency while adapting to different safety requirements, thereby resolving the contradiction between productivity and safety risks.
Solution Approach 2:
The patent changes the speed parameter based on the operation mode. By detecting whether the operating signal comes from the vehicle or a remote device, the controller modifies the movement speed parameter accordingly. This parameter change strategy enables the system to achieve both fast operation (when safe) and reduced interference risk (when remote), effectively resolving the technical contradiction.
2Object-affected harmful factors
If the open-close body moves at reduced speed during remote operation, then the risk of object interference is reduced, but the operation time is extended
Solution Approach 1:
The patent applies local quality by implementing speed control specifically in the shutting region rather than throughout the entire movement range. The controller maintains normal speed during most of the opening movement and only reduces speed when the open-close body enters the shutting region (within a predetermined dimension from the fully-closed position). This localized speed reduction minimizes the impact on overall operation time while still providing safety benefits where object interference is most likely to occur.
3Reliability
If the closing speed is reduced in the shutting region during remote operation, then the safety is improved, but the productivity is reduced
Solution Approach 1:
The patent segments the closing movement into two distinct phases: a normal speed phase for most of the closing distance and a reduced speed phase for the shutting region. By dividing the closing operation into these segments, the system can maintain high productivity during the majority of the movement while ensuring safety in the critical shutting region where object entrapment is most likely. This segmentation allows the system to achieve both safety and productivity simultaneously.
Data Source
AI summary
An open-close body driving device includes a motor configured to open and close an open-close body included in a vehicle and a controller controlling a movement speed of the open-close body driven by the motor. The controller is configured to move the open-close body at a normal speed based on a vehicle-side operating signal output by operation of an operating switch installed on the vehicle and at a speed lower than the normal speed based on a remote operating signal output by operation of a mobile device. The controller is configured so that in a shutting region having a predetermined dimension from a fully-closed position toward an open side, closing movement of the open-close body based on the remote operating signal is slower than closing movement of the open-close body based on the vehicle-side operating signal.