Vehicle Window Control Device Load Detection Sealing
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Solution Overview
Problem
Existing opening-closing control devices for vehicles, such as window lifting mechanisms, often result in uncomfortable impact noise and increased load on the drive system due to excess impact force during closure, leading to reduced sealing performance and potential water or wind infiltration.
Innovation Solution
An opening-closing control device equipped with a load detector and a drive-force stopping device that detects increased load on the opening-closing member near the fully closed position and stops the drive force supply just before reaching the mechanically limit position, ensuring complete contact between the opening-closing member and the elastic member for improved sealing and reducing impact noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening-closing member is driven until mechanically locked at the fully closed position, then the sealing performance is improved, but excess impact force is applied to the glass window, window frame and drive system
Solution Approach 1:
The control device performs preliminary action by detecting the load increase caused by contact between the opening-closing member and the elastic member before reaching the mechanically limit position. Based on this detection, the drive force is stopped in advance, allowing the elastic member to elastically deform and absorb the impact, ensuring both sealing performance and impact reduction
2Force
If the drive motor is stopped at the timing of contact of the opening-closing member with the elastic member, then the impact force is reduced, but a clearance is produced between the opening-closing member and the elastic member
Solution Approach 1:
The control device uses feedback by continuously monitoring the load on the opening-closing member during the closing operation. When the load increases due to contact with the elastic member, the system detects this change and adjusts the drive force stopping timing accordingly, ensuring the opening-closing member moves the elastic member to achieve complete contact and proper sealing while avoiding excessive impact
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents erroneous stopping of the opening-closing member, ensures complete contact for enhanced sealing performance, and reduces impact noise by stopping the drive force supply before reaching the mechanically limit position, thereby avoiding stress on the drive system.
Implementation Method 1
a load detector that detects an increase of load on the opening-closing member when the opening-closing member is located near a fully closed position
Implementation Method 2
an elastic member that is disposed on an end of the opening portion and is opposed to the opening-closing member in a moving direction of the opening-closing member
Data Source
AI summary
An opening-closing control device drives an opening-closing member with use of a drive device and controls the opening-closing member to open or close an opening portion. The opening-closing control device includes a load detector and a drive-force stopping device. The load detector detects an increase of load on the opening-closing member due to pressing of the opening-closing member against an elastic member that is disposed on an end of the opening portion and is opposed to the opening-closing member in a moving direction of the opening-closing member. The drive-force stopping device stops a drive force supplied to the drive device at a timing just before the opening-closing member reaches a mechanically limit position in a closing direction of the opening-closing member when the increase of load is larger than a predetermined threshold.