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Re: Camless Saab.
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Posted by ELaw [Email] (#699) [Profile/Gallery] (more from ELaw) on Thu, 26 Feb 2015 17:06:00 Share Post by Email
In Reply to: Camless Saab., dmz789qqq, Thu, 26 Feb 2015 14:08:19
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Well... it's possible the claims are exaggerated but the underlying principles are sound.

The lift and timing of camshafts is a compromise - without variable valve timing, one set of values has to work for all combinations of load and RPM. VVT can help, but often has a limited range and in most implementations can't control duration.

While it's unclear whether it can control lift, the Koenigsegg system can infinitely and per-cylinder (per-valve actually!) control both valve opening and closing time - that's huge.

Although I will say I'm skeptical of the "2-stroke at some times and 4-stroke at other times" claim... there's more to the design of a 2-stroke engine than just valve manipulation.

And as far as one cylinder breaking and the engine keep running for years... that's fine but I don't think a 3-cylinder 9-5 would be the most enjoyable car to drive.

->Posting last edited on Thu, 26 Feb 2015 17:06:56.
_______________________________________
Eric Law

Current collection:
'12 Audi A4 quattro (self-tuned)
'14 Audi A6 quattro (also self-tuned)

Gone but not forgotten:
 '72 99, '77 99 (became a turbo, twice)
 '80 900T 5-door, '81 900T, '86 900S (became a turbo), '86 900 SPG
 '86 9000, '97 9000 Aero
 A bunch of Audis, '69 Firebird, '64 Toyota Corona (first car, cost $35 and worth every penny)

Be alert... America needs more lerts!
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