It seems I am lacking one critical bit of information on this variable cam configuration. I don't understand how the cam "lifter" can be changed to allow a different duration/higher lift (whatever it is that happens). I do understand how a regular cam shaft works. What is the mechanical change that takes place and how is it actuated?
These diagrams are from a Porsche system however Elio Motors will be using essentially the same setup on each of the three intake valves. The computer uses a valve to allow oil pressure either lock or unlock the center pin so the valve is either activated by the dual outer cam lobes or the inner cam lobe which allows the intake valve to have two different lift/timing configurations depending on the load.
Great valve train pictures. An important thing not being shown, for non-gearheads, is that the entire valve train, from the camshaft bearings to those cams actually spinning on the valve set, are running in a constantly pressurized oil bath. This is good illustration of the importance of having very clean oil in your engine.
