Originally Posted by Gary F
I've also heard of development work on an electronic valve lift mechanism which will eliminate cams and the dreaded timing belts. The engine management system can control each valve independently in the same way it operates the fuel injectors and spark plaugs now. This would remove any compromises in the valve timing and setup.
And one more boring fact, did you know that not one honda VTEC engine has failed under warranty despite the extra complexity. Wish we could point to a similar Alfa feature !
Ah yes...sore point. Belive it or not i thought years ago about why dont they contorl valves hydraulically or elctrically etc and remove cames etc - the benfits less for engine to ddrive, less friction, heat, and you can have true continuously variable inlet and outlet valve control with associated precision and efficiency benefits.
Was discusing this with an engineer at work, and he scoffed at the idea. But would you adam and eve it, in Mays 'automotive engineering' magazine, one of the articles is just about exactly that an 'electromechanical valve actuation-equiped cylinder head', and though many OEM suppliers have dropped the idea for now, one is striding ahead, and recons it will be on production cars by 2010/12.
So I should of patented the idea years ago....damn.
But do you know what the real kick in the teeth is....this bloody company that is developing this is the one I (and said engineer) work for - Visteon.....b*stards!!
Anyway expect the end of cams, timing belts/chains, VVT etc in about 6 years - with appx improvement of 15% in economy, and 20-30% in torque + less noise.
Durability is the issue really at this time - wont bother AR boys, so get it on!!!!
Any way the mag has a whole load of stuff on the 2 systems - 2 stage and fully variable (phase or lift).
GM are set in introduce variable cam timing for both inlet and exhaust on its ecotec l4 engine, so maybe this will filter to AR 6 pots?
Hold the rear end slide....don't run wide!
156 2.0TS Veloce Lthr (02/02), silver, black Momo, BMC filter,V6 intake, DS2500 Front-DS Perf Rear pads, Conti sportcontacts, OMP strut Brace
Built in Italy, on the last Friday before (hic) Xmas........:-/