power window for dummies
TRANSCRIPT
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Power window for dummies
Maarten Van Overbeke
Technological Design Engineering
Docent: Rino Versluys
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Short history...
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• 1940 : first power window for cars was introduced in the Packard 180 series
• It remained a luxury feature for many years. Most vehicles had windows that were operated by a hand- turned crank.
• 1980 : Slowly it became a standard feature . The development of new electric window systems increased.
• 2000 : Many vehicle manufacturers eliminated hand-cranked windows completely.
• 2010: Power windows have become so common that producers consider it as a standard option.
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Different types of window regulators...
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inn
ovati
on
Time
Manual window regulator
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Manual window regulator
Cross-arm window
regulator
inn
ovati
on
Time
electric
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cross-arm window regulator...
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Components & materials...
window motor: - small spur gear- spur gear - worm gear - DC motor
fixed bar + linkagegalvanized steel
car windowglass + polyvinyl butyral layer (PVB)
half spur gear + lang arm linkage
galvanized steel
roller guide galvanized steel
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Gear mechanism...
open
activate window motor by pushing : down
button
roller guide
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Gear mechanism...
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Gear mechanism...
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Window motor...
half spur geargalvanized steel
Small spur geargalvanized steel
DC motor
view: front
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Window motor...
DC motor (12V)
spur gearpolycarbonate (PC)injection molding
view: bottom
driving axis (also contect ed with small spur gear on the other side) stainless steel
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Window motor...
(stator)
(rotor)
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Window motor...
(stator)
(rotor)
Hall effect switch
thermal switch
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Hall-effect switch...
Hall sensor
1
0
control box signal
output signal
For instance: push window goes open
window motor
motor output = o
spur gear (PC)
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Active forces...
Fg1
Ff Ff
Ff : friction force
M1 : moment small gear
M1M2
M2 : moment big gear
Fg1 : gravitation force windowFg2 : gravitation force big gear
Fg2
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Manual window regulator
Cross-arm window
regulator
Track-guided window regulator
inn
ovati
on
Time
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track-guided window regulator...
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Manual window regulator
Cross-arm window
regulator
Track-guided window regulator
Double-guided window regulator
inn
ovati
on
Time
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double-guided window regulator...