Camless gasoline engine technology
10/14/05, 08:51 AM
#3
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Seems they would use this technology only on a free running engine, not an interference one. At first at least. A hiccup in the electronics causing a valve crash would not be a cheap experience.
10/14/05, 09:26 AM
#4
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Originally posted by DiamondBlue@October 14, 2005, 9:54 AM
Seems they would use this technology only on a free running engine, not an interference one. At first at least. A hiccup in the electronics causing a valve crash would not be a cheap experience.
Seems they would use this technology only on a free running engine, not an interference one. At first at least. A hiccup in the electronics causing a valve crash would not be a cheap experience.
10/15/05, 10:02 AM
#5
Needs to be more Astony
I always liked this system... not having to worry about all the computerized electrical stuff and still see similar gains..
Coates Rotary Valve System
Coates Rotary Valve System
For instance: a static test of a five-litre poppet valve engine on an airflow machine produced a reading of 133 cubic feet per minute (CFM) with valve fully opened. The five-litre Coates Spherical Rotary Valve Engine on the same machine, however, produced a reading of 319 CFMs fully opened; a colossal advantage in airflow comparison. A five-litre poppet vavle engine tested on a dynomometer under the same loads and conditions at 5500 produced 480 BHP and 454 foot pounds of torque. The maximum RPMs on the poppet valve engine were 5700 RPMs; the Spherical Rotary Valve Engine in comparison reached 14,850 RPM's
10/15/05, 01:35 PM
#8
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Originally posted by Knight@October 15, 2005, 3:05 PM
The valve, spring, and all the indutries that make valve train probabaly had somthing to do with not making it happen.
The valve, spring, and all the indutries that make valve train probabaly had somthing to do with not making it happen.
Rotary valvetrains have been around for a very long time (since the first IC engines).
I'm guessing the longevity of the system isn't as great as they allude to. I know they say they ran it through durability tests, but something just doesn't add up. I suspect seals wear relatively quickly and there's leakage issues.
The electronic poppet valves have much more potential.
10/17/05, 02:40 AM
#9
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nice idea in theory. I do not imagine any reason why they cannot manage it technically. As for acceptance, I am already getting a little wary that computers now have too much input in an engine. I loved the days when you could take a spanner to your car and fix it!
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