Re: VANOS

["Gary Derian" <gderian@xxxxxxxxxxxx>]

It changes the cam timing relative to the crankshaft angle.  The double
VANOS works on both cams.  In a nutshell it reduces overlap at idle and near
redline and increases overlap in the middle rpm ranges.

Gary Derian <gderian@domain.elided>



> Can anyone provide a modest summary of the VANOS system? As
> RPMs increase, does it change (1) valve opening time, (2)
> valve closing time, (3) valve lift? I would think that
> higher RPMs need (1) and (2), but cannot imagine a
> mechanical system that can do that, short of a variable cam
> lobe configuration. Thanks.
>

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