Heated Sliding Window Switch Circuit
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Solution Overview
Problem
Existing power operated sliding window assemblies in motor vehicles do not effectively disable the defrost current when the sliding window is opened, risking an electrical arc between the moving and fixed window contacts.
Innovation Solution
A heated sliding window assembly with a switch or sensor in the electrical circuit that cuts off current to the heater grid when the sliding window is moved, using a rail and drive mechanism to ensure safe operation by preventing contact disengagement and potential arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sliding window is opened while defrost current is active, then electrical arcs form between the contacts, but keeping the current disabled prevents arcing and ensures safe operation
Solution Approach 1:
The switch is activated in advance when the sliding window begins to move, cutting off the defrost current before the contacts separate. This preliminary action prevents the harmful electrical arc from forming when the window transitions from closed to open position.
Solution Approach 2:
The drive mechanism provides feedback about the sliding window's position and movement state to the switch. When the window starts moving, this feedback triggers the switch to open the electrical circuit, dynamically controlling the current based on the real-time operational state of the window.
2Reliability
If a switch is added to cut off current when the window moves, then arcing is prevented, but the device complexity increases
Solution Approach 1:
The switch is integrated with the existing drive mechanism of the sliding window. The same mechanical components that control window movement also control the electrical circuit, merging two functions into a unified system and avoiding the need for separate independent control mechanisms.
Solution Approach 2:
The drive mechanism serves dual purposes: it controls both the mechanical movement of the sliding window and the electrical switching of the defrost current. This multi-functionality reduces the need for additional dedicated components and simplifies the overall device architecture.
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 electrical arcs and ensures safe operation by disabling the defrost current as the sliding window opens, maintaining functionality and safety in motor vehicle window assemblies.
Implementation Method 1
the sliding window includes a heater grid and an electrical contact. An electrical circuit is included for carrying current to the heater grid
Implementation Method 2
A switch is disposed within the electrical circuit that cuts off current to the heater grid when the sliding window is moved
Data Source
AI summary
A heated sliding window assembly for a vehicle that includes at least one fixed window. A rail is attached to the at least one fixed window. The fixed window may include an electrical contact. A sliding window is moveable along the rail and is moveable between open and closed positions. The sliding window includes a heater grid and an electrical contact. A drive mechanism is attached to the sliding window for moving the sliding window between the open and closed positions. An electrical circuit is included for carrying current to the heater grid. A switch is disposed within the electrical circuit that cuts off current to the heater grid when the sliding window is moved.