2.0 8v TS variable valve timing
So, ive done some searching on the net to better understand how this works and what it consits off, but i havnt found much only wikipedia,
This was the first production engine to use variable valve timing. The variable valve timing is done with a solenoid
the Alfa system varies the phase relationship between a camshaft and crankshaft (i.e. piston position). The Alfa system, on their twin cam engine, is only applied to the inlet camshaft, the exhaust camshaft being unaffected.
Alfa Romeo's variator is a cylindrical chamber that contains a pressure chamber and piston along with helical splines. Engine oil pressure, moves the internal piston which rotates slightly due to the helical splines and advances the inlet valve timing by 25 degrees. Oil flow to the variator is controlled by a solenoid valve. When engine speed reaches a certain speed, normally 1500-2000 rpm in the Twin Spark application, the solenoid energises, causing pressurised oil to be directed through the inlet camshaft into the variator. The inlet camshaft position is advanced 25 degrees, thus increasing valve overlap. It remains in this advanced state until about 5000 rpm when the solenoid switches off, and the variator piston returns the valve timing to its natural state
It sounds pretty good, does anyone know where it can be found in the engine?