Soldato
And I thought VVT was pretty clever!
End of the CamShaft ?
- Thread starter Catanonia
- Start date
Soldato
So let me get this right! Koenigsegg did not invent this tech, SAAB did?
So Koenigsegg have picked up the ball and are going ahead with it all...
Im stunned! Surely SAAB was worth saving as a brand? They always did make good stuff, well until GM got their hands on em
So Koenigsegg have picked up the ball and are going ahead with it all...
Im stunned! Surely SAAB was worth saving as a brand? They always did make good stuff, well until GM got their hands on em
Soldato
I was under the impression that the tech belongs to Cargine?
Difficult to judge on a test mule like that though, don't forget he said it has just been fitted with the fifth generation system so how many miles any one unit has done is a mystery.
It looks like a fantastic technology and I look forward to seeing it implemented. I now also want a Koenigsegg really quite badly
Man of Honour
Formula one has been on a similar track for a while as it uses Pneumatic units to return the valves to their seats rather than valve springs, at least I know the Cosworth CA does
Associate
- Joined
- 6 Feb 2008
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- 1,750
Is that computer controlled though or just like the gas strut that opens your boot?
Associate
It's a fantastic idea, and could potentially lead to a map that good adjust itself throughout the rev range. So all the benefits of a high lift cam at high revs, with the smooth idle of a normal cam!
The pneumatic part just replaces the spring that's in a conventional set-up. (has been in F1 for quite a while, and Moto GP for some time)
From what i understood from the vid, it's only opened by the actuator, still closed by the pneumatic pressure.
Amazing concept though. Map in a cam profile!
Didn't Lotus have something similar a few years ago as a single cyl test motor?
Associate
This sort of thing has been going on for a fair while now on big diesels.
Associate
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- 30 Sep 2009
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- 431
I'm pretty sure Fiat are doing something along these lines with there twinair engine that's in lots of cars.
Soldato
Valeo has been developing and Electromagnetic camless setup for some time now http://green.autoblog.com/2006/12/1...-for-camless-engine-with-smart-valve-actuati/ the only difference is the use of Air rather than magnets, both of which have advantages and disadvantages. Both allow for a storage system under braking although one would be elctric motor hybrid for power rather than just an air engine.
Yes the Multiair system still uses cams and conventional valve springs. The difference is that there is a hydraulic system between the cam and the valve to delay opening or advance closing. It's a clever and (so far) reliable system, but doesn't give the flexibility that direct valve actuation would.
Could the manufacturers be holding this back for profits / lifespan / spares until forced to ?
/Grabs his tin foil hat.
/Grabs his tin foil hat.
Associate
Wouldn't be entirely surprising. Keep hold of it until fuel prices actually start to affect sales of IC engines, then oh look, we found 30% more fuel economy with our clever new design!
Caporegime
Everyone is fighting tooth and nail for fuel economy, there's no way every car manufacturer would hold back something that would give them a massive market lead.