On Mar 19, 1:34 pm, "jhon077" <u42257@[EMAIL PROTECTED]
> wrote:
> Hi All,
>
> I came across this website powerxtractor.com through a friend of mine
> and this new engine sounds pretty impressive, but I don't know enough
> myself. What do you all think, is it really good as my friend said?
>
> Thanks in advance for help
Interesting concept... but 2 stroke engines have been around a while..
Detroit Diesel 2 stroke engines have used pressurized scavenging
since, if I recall, the 1920's,
and there are probably dozens more from the early part of the 1900's.
For a regular car engine to be converted to 2 stroke would require a
complete redesign for any kind of longevity, as doubling the firing
events (which could conceivably double power output as well) would
double engine stresses and way more than double internal engine
temperatures.
It would also require direct injection to keep emissions down. The
Orbital engine from Australia in the late 1980's got a lot of
attention (and investment from auto makers) with their 2 stroke
engines but failed because of high emissions, (much like the Wankel
trails from the '70s.)
The elliptical crank idea appears to me to be interesting, but
essentially unworkable. Side thrust on the connecting rod/links would
be difficult to manage, castings would be very intricate and
expensive, and leverage between the rods and crank would seem to be
significantly lower than a conventional radial engine with a master/
link rod setup.Heat and higher order vibration would be issues as
well.
Rotary engines, Wankel engines, barrel engines, swashplate engines,
opposed piston engines, free piston engines, 6 stroke steam assist
engines, Atkinson cycle engines, gas turbine engines, sleeve valve
engines, radials, W and H engines... the history of engine development
is rich with novel approaches to the internal combustion engine.
Almost all of what we see now was tried by the '40's in aircraft
engines, including dual overhead cams and 4 valves per cylinder
(Peugeot 1906), supercharging and turbochargers ( WW1), Fuel injection
(Bendix 1930's) Direct Fuel injection (Daimler 1930's) Active
combustion monitoring (Sperry 1952) Variable compression engines (Sir
Harry Ricardo 1903), Opposed pistion 2 stroke supercharged diesel's
(Junkers Jumo 1930's and Napier Deltic 1950's) and no doubt many
others.
New ideas are always popping up, but almost none ever run, much less
reach production.
The basic 4 stroke car engine has the benefit of over 125 years of
development. It currently costs the automakers more to engineer a new
car door than it does an engine; they are cheap to make, with high
power, long life and very low emissions. It will take something
awfully special to replace it.
HTH,
Ben
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