Frameless Vehicle Door Window Position Control
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Solution Overview
Problem
Frameless vehicle doors with windows that extend upward into the vehicle frame when closed can suffer interference during opening or closing, potentially damaging the window, as existing systems lack a mechanism to automatically adjust the window position to prevent such interference.
Innovation Solution
A system comprising a regulator motor and controller that transitions the window pane between open and closed positions, with the controller programmed to move the window to a partially open position when the battery voltage drops below a threshold, ensuring clearance from the vehicle frame and minimizing exposure to external elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the window pane is designed to extend upward into the vehicle frame when closed, then interior isolation is improved, but interference during door operation occurs that can damage the window
Solution Approach 1:
The controller proactively lowers the window pane to a first intermediate position between the closed and fully open positions in response to detecting that the door is about to open. This preliminary action occurs before the door actually opens, preventing interference between the window pane and door components. The system monitors door status signals and triggers the window lowering action in advance, eliminating the risk of damage while maintaining the ability to extend upward for isolation when needed.
2Object-affected harmful factors
If the window pane remains in the closed position, then interior isolation is maintained, but the window may interfere with door operation when battery power is sufficient
Solution Approach 1:
The controller continuously monitors door status signals and battery voltage levels to determine the appropriate window position. When the door status indicates an opening condition and voltage is above the threshold, the controller commands the window to the first intermediate position. When voltage drops below the threshold and the door is closed, the controller commands the window to the second intermediate position. This feedback-based control dynamically adjusts the window position to balance isolation and operational ease based on real-time conditions.
3Reliability
If a controller system is added to automatically adjust window position, then window interference is prevented, but device complexity increases
Solution Approach 1:
The controller integrates multiple functions into a single device: it monitors door status signals, measures battery voltage levels, determines appropriate window positions based on combined conditions, and commands the regulator motor accordingly. This multi-functional approach prevents window interference while avoiding the need for separate sensors, voltage monitors, and control logic distributed across multiple components, thereby limiting the increase in overall system complexity.
Data Source
AI summary
A frameless vehicle door includes a window pane, a regulator motor, and a controller. The window pane is configured to being movable between at least a first and a second open position and a closed position. The window pane is configured to extend upward from a top of the door and into a vehicle frame when the window pane is in the closed position. The regulator motor is disposed within the door and is configured to transition the window pane between the open positions and the closed position. The controller is programmed to, in response to a voltage of a battery, that is configured to power the regulator motor, decreasing to less than a threshold and the window pane being in the closed position, transition the window pane to the second open position that is between the first open position and the closed position.