Thread: How much can the window assembly lift?
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Unread 23-06-2002, 22:59
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#0047 (ChiefDelphi)
  
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Figure it out...
Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 2/2/2000 6:06 PM MST


In Reply to: How much can the window assembly lift? posted by nuts4first on 2/2/2000 5:13 PM MST:



Window lift motor is about an 12 N-m motor (stall torque).

The tape drive pinion is about 1.5 inches in diameter, .75 inches in diameter (sorry, that is 0.019 meters in radius).

At that radius, it will take 12/.019 Newtons to stop the motor (630 Newtons = 141 lbs).

But...

The tape drive is not 100% efficient so you have to take that into account.

I would guess that in tension, the window lift units should be about 70% efficient.

So....

How about 100 lbs?

Close enough to what I remember.

The units put out less when the tape is in compression. Perhaps 20 lbs less, especially if you bend the channel.

I hope this helps.

Joe J.



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