07-25-2009, 06:22 PM
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#2 (permalink)
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A True Z Fanatic
Join Date: Mar 2009
Location: Charleston, SC
Posts: 15,181
Drives: '07 Z4 "M" Roadster
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Quote:
Originally Posted by kannibul
As I understand it, the throttle body is basically wide open all the time, and the engine is controlled completely by the VVEL system - where the intake timing/lift/duration is varied to increase/decrease to increase or decrease RPM and/or power.
So...with that, the VVEL system is powered by a DC motor...one for each bank of cylinders, where it controls the lift/duration/timing part of the whole equation (I there's an eccentric shaft that replaces the camshaft, I know...)
What happens if one (or both) DC Motor(s) fails and locks up, and say you're going 75MPH down the highway?
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You know, I have wondered that same question.
John
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