Frameless Door Window Indexing to Prevent Seal Clipping
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Solution Overview
Problem
Frameless-door window systems in motor vehicles are susceptible to wind noise due to aerodynamic forces causing the window glass to deflect outboard, and existing solutions require the door to be partially opened before indexing the window to clear the seal retainer, risking clipping if the door is opened quickly.
Innovation Solution
A frameless-door glass window operating system that includes a door actuator, door latch controller, and window controller, where a trigger signal is sent to index the window to a clearance position before the door is unlatched, ensuring the window clears the seal retainer prior to opening, using a signal line for communication between the controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the window is indexed after the door is partially opened (prior art approach), then the window clears the seal retainer for door opening, but the window may clip the seal retainer if the door is opened quickly
Solution Approach 1:
The window indexing action is performed in advance before the door unlatching begins. The control system detects the door opening initiation and triggers the window regulator to index the window to the clearance position prior to door movement, ensuring the window is already in the correct position before the door opens, thereby eliminating the clipping risk entirely
2Ease of operation
If the window is indexed before the door is opened, then the window clears the seal retainer simultaneously with door opening, but the control timing must be precisely coordinated
Solution Approach 1:
The control system uses feedback from the door latch controller to detect when the door opening action is initiated. This feedback signal triggers the window controller to begin indexing the window. The system continuously monitors the door latch status and window position to ensure proper coordination, adding complexity but ensuring reliable operation
Data Source
AI summary
A frameless-door window operating system is provided for a vehicle door. The system includes a door actuator, a door latch controller, a window controller and a door window displaceable between a closed position and an indexed position providing clearance to open the door.