Vehicle Window Controller Foreign Matter Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle window opening devices face issues with erroneous entrapment detection and repetitive drawing of door belt moldings, which hinder the effective release of foreign matters and affect the performance of foreign matter detection.
Innovation Solution
A vehicle window opening device equipped with a controller, change detector, and drawing detector that restricts window opening after foreign matter detection, uses speed control zones, and adjusts threshold values to differentiate between foreign matter and door belt molding drawing, thereby preventing unnecessary entrapment and improving detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the window is closed at high speed to release drawn-in foreign matter, then the foreign matter can be quickly released, but a sudden load may be applied to the foreign matter causing erroneous entrapment detection
Solution Approach 1:
The patent applies dynamics by adjusting the window closing speed based on the detection state. When foreign matter drawing is detected, the closing speed is set to a predetermined low speed to avoid applying sudden load. When no drawing is detected, the closing speed returns to normal high speed, optimizing both release efficiency and detection accuracy dynamically.
Solution Approach 2:
The patent changes the speed parameter of window closing based on detection results. The control unit adjusts the closing speed from high to low when foreign matter drawing is detected, and from low to high when no drawing is detected, thereby resolving the contradiction between fast release and accurate detection.
2Reliability
If the entrapment prevention function is activated to detect foreign matter, then foreign matter can be detected, but door belt molding may be drawn in and cause repetitive false detections
Solution Approach 1:
The patent applies preliminary action by detecting foreign matter drawing before closing the window. The control unit detects if foreign matter is drawn in during window opening, and based on this preliminary detection, adjusts the closing speed to prevent false entrapment detections caused by door belt molding.
Solution Approach 2:
The patent uses feedback by continuously monitoring the window opening state to detect foreign matter drawing, then using this information to control the closing speed. This feedback mechanism distinguishes between actual foreign matter and door belt molding, reducing false detections.
3Reliability
If the window opening is restricted after foreign matter detection, then erroneous entrapment detection is prevented, but the window cannot be opened to release foreign matter
Solution Approach 1:
The patent applies dynamics by making the opening restriction conditional. The control unit restricts window opening only when foreign matter drawing is detected during closing, but allows opening when no drawing is detected, thereby maintaining both detection accuracy and operational flexibility.
Solution Approach 2:
The patent changes the opening permission parameter based on detection state. When foreign matter drawing is detected, opening is restricted to prevent false detections. When no drawing is detected, opening is permitted, balancing reliability and ease of operation.
Data Source
AI summary
A vehicle window opening device includes a controller, a change detector, and a drawing detector. The controller configured to control opening and closing of a vehicle window based on a drive force of a motor. The change detector is configured to detect a change in a state of movement of the vehicle window. A drawing detector is configured to detect drawing of a foreign matter by the vehicle window based on a change detected by the change detector. The controller is configured to restrict opening of the vehicle window after the drawing detection.