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Originally Posted by fishhouse4;
School me...how does the solenoid work exactly? Guessing it gets input from the wiring harness on the front (the part that sticks out)...but oil runs through the other end that is inside? For what purpose...like what does the solenoid do specifically to make all this fancy VVT function.
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A little bit of educated guess here because the solinoids are on/off as far as I can tell and the vanos is analog:
I am pretty sure the solinoids get a pwm signal to send a metered amount of oil pressure to the vanos. Internal to the vanos there are a set of internal helical gears that mesh in such a way that as oil pressure is applied it changes the relative angle between the input and output teeth.
The cam position sensors feedback where the cams are and the solinoids get more or less signal to advance or retard the cams to match the program for the current speed and load.