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Originally Posted by caneswell
How is this different from BMW's valvetronic? They have been using throttle-less induction for quite a while.
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If I understood the official explanation correctly, this uniair system regulates the valve lift for each cylinder individually in order to regulate the intake air resonance interference between the different cylinders, where as BMW's Valvetronic changes the valve lift for all the cylinders together. So all the intake valves have always the same lift (expect with Valvetronic II, which has a built in difference between the two intake valves of each cylinder to improve in-cylinder flow at low and mid-range rpm).
Also the uniair system uses a different valve lift actuation system (hydraulic pressure vs an electric motor turning an eccentric shaft for the Valvetronic) and takes into account some more parameters (for example cylinder individual flow sensors).
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