Morning.

Been reading the latest Evo magazine, im which they looked at the new cloverleaf Alfa Mito which has a new 1.4 engine featuring what they call MultiAir. It features a head with vaves laid out like a DOHC head, it's only 1 camshaft though with lobes for both inlet and exhaust, sat above the exhaust valves.

It has a set of pushrods from the inlet lobes to the front of the head. These pushrods work on what is effectively a set of modified hydraulic tappets, there is an electronically controlled valve on each one.

The ECU releases oil from each tappet depending on load, revs, etc. This means that the lift and duration can be adjusted, as well as the timing of the opening, and does allow 2 seperate small valve openings per cycle if need be.

I think this is right, it's been a while since I read the article, but after speaking to Stu today I thought I'd post it up here....