A nice simple design eliminating valvegear. Could be a good engine used as a range extender powering a genny for hybrids. It is small, neat and smooth with no valvegear.
"how do you assemble the conrods to the crankshaft?"
The conrod big-end hole diameter is 52mm, the crankpin diameter is 48mm, the plain bearing is 2mm thick (from BMW1600). The conrod passes to its crankpin, then it is "locked" by the plain bearing.
"What do the 2 little pistons on the side do?"
They are the "cross-head" mechanism of the exhaust piston: they take the thrust loads. The PatOP uses one crankshaft for both pistons, while OPRE needs two.
u have the same amount of time for injection as any other engine, u can after all, only inject from just below tdc then until piston has travelled 1/3 to 1/2 way down cylinder, any more and the injectors become just flame throwers, any fuel then injected being wasted.
Electric is the future.
NocturneSonate 3 months ago
A nice simple design eliminating valvegear. Could be a good engine used as a range extender powering a genny for hybrids. It is small, neat and smooth with no valvegear.
NearAbbeyRoad 3 months ago
it would make one hell of a mess if it blew up lol
nice design, do u have a running prototype?
ismokewead420 5 months ago
because normal diesel engines don't have enough torque :P
megamonkeyathotmail 5 months ago
Been Following your projects with much interest since the variable lift valves times.
The big piston on the bottom, are you using it as a scanvange for the 2 stroke diesel cycle? would be great if you force fed that pump with a turbo!
WickedTRX 8 months ago
"how do you assemble the conrods to the crankshaft?"
The conrod big-end hole diameter is 52mm, the crankpin diameter is 48mm, the plain bearing is 2mm thick (from BMW1600). The conrod passes to its crankpin, then it is "locked" by the plain bearing.
"What do the 2 little pistons on the side do?"
They are the "cross-head" mechanism of the exhaust piston: they take the thrust loads. The PatOP uses one crankshaft for both pistons, while OPRE needs two.
Photos at the pattakon web site
pattakoncom 8 months ago
What do the 2 little pistons on the side do?
phoolosopher 8 months ago
how do you assemble the conrods to the crankshaft?
phoolosopher 8 months ago
Comment removed
phoolosopher 8 months ago
You are wrong.
There is some 35 to 40% additional time near the combustion dead center, as compared to the conventional of same con-rod to stroke ratio.
Think, for instance, the time the piston remains at the last 10% of the piston travel, as it approaches the TDC.
At 6000 rpm the time in the PatOP is the same with the time of the conventional running at 4500 rpm.
Visit the pattakon web site and see the plots. Also the "Fuel View Point" gif animation. You will understand.
Thank
pattakoncom 9 months ago
u have the same amount of time for injection as any other engine, u can after all, only inject from just below tdc then until piston has travelled 1/3 to 1/2 way down cylinder, any more and the injectors become just flame throwers, any fuel then injected being wasted.
tpvalley 9 months ago
DanFrederiksen : isn't it just a two stroke engine with needless complexity? how is it better than a normal one? vibration maybe
Please visit the pattakon dot com web site and read about the OPRE and then about the PatOP opposed piston engines.
pattakoncom 1 year ago
isn't it just a two stroke engine with needless complexity? how is it better than a normal one? vibration maybe
DanFrederiksen 1 year ago
k fadazome oti den xriazete kan to kolourokoniko sxima pleon sto emvolo pou apla olisthenei mesa tou to omoaksoniko komvio etsi?
SquadraCorseGr 1 year ago
Etsi.
Sto Youtube exei ki allo ena video pou to idio prototypo dοulevi me petreleo. Psaxe sto PatOP.
Ετσι.
Στο Youtube έχει κι άλλο ένα video που το ίδιο πρωτότυπο δουλεύει με πετρέλαιο. Ψάξε στο PatOP.
pattakoncom 1 year ago
That is truly amazing. Will you be selling these any time soon? I want one for a motorcycle.
FrankiePintado 1 year ago
That's pretty cool. It seems like at tdc, the pistons are almost touching. Is that going to work?
FrankiePintado 1 year ago
@FrankiePintado
It works.
Open the other PatOP engine video wherein the same prototype runs on Diesel fuel.
pattakoncom 1 year ago
This is really amazing! You are such a genius. I can't wait to see it working.
zooluwarrior 1 year ago