Power window for dummies

Maarten Van Overbeke

Technological Design Engineering

Docent: Rino Versluys

Short history...

• 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.

Different types of window regulators...

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Manual window regulator

Manual window regulator

Cross-arm window

regulator

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electric

cross-arm window regulator...

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

Gear mechanism...

open

activate window motor by pushing : down

button

roller guide

Gear mechanism...

Gear mechanism...

Window motor...

half spur geargalvanized steel

Small spur geargalvanized steel

DC motor

view: front

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

Window motor...

(stator)

(rotor)

Window motor...

(stator)

(rotor)

Hall effect switch

thermal switch

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)

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

Manual window regulator

Cross-arm window

regulator

Track-guided window regulator

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track-guided window regulator...

Manual window regulator

Cross-arm window

regulator

Track-guided window regulator

Double-guided window regulator

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double-guided window regulator...