VANOS is a variator system that varies the timing of the valves by moving the position and the camshafts in relation to the drive gear. The relative timing between inlet and exhaust valves is changed.
At lower engine … See more

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The first-generation single VANOS system adjusts the timing of the intake camshaft to one of two positions — e.g. the camshaft is advanced at certain engine speeds. VANOS was first … See more

The second-generation double VANOS system adjusts the timing of the intake and exhaust camshafts with continuously variable adjustment, based on engine speed and throttle … See more