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OPOC Engine

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75Plus:
This video has been around since 2008 but I could not find any reference to it on the site so I am posting it.

The capabilities of this engine, if proven, are mind boggling. 325 HP from 2 cylinders with 4 pistons. Funny thing, I have often thought of an engine similar to this, 2 pistons in one cylinder, but never considered it as a 2 cycle, turbo charged, diesel.

http://www.engineeringtv.com/video/Opposed-Piston-Opposed-Cylinder

Joe

Bluechip:
Joe

Very interesting configuration, I wonder what the balance is like ??

Many other manufacturers have done the 2 pistons/ one cylinder concept though.

Here's 6 pistons in three cylinders .. and IIRC Junkers did a very slim aircraft diesel engine with the principle.

Would have to do a search for that one .. I may be wrong .. circa 1930's I think ..

http://en.wikipedia.org/wiki/Napier_Deltic

BC

EDIT  Oops, brain fart yet again... It looks like the Wiki link refers to the Junkers engine ... 

John Stevenson:
Commer built one for their trucks, 3 cylinder, 6 pistons, finished up at 3.53 Litres and 150 BHP

http://www.sa.hillman.org.au/TS3.htm

For some reason Wikipedia and this site are quoting the earlier engine.

Fitted in a 4 wheeler rated at 14 tons they would do 19 mpg, try asking someone with a 3.8 Jag to load 14 ton on the arse and get 19 to the gallon  :lol:

John S.

75Plus:

--- Quote from: Bluechip on March 06, 2011, 07:00:53 PM ---
Very interesting configuration, I wonder what the balance is like ??

BC

--- End quote ---

According to the designer balance is not a problem as the crankshaft is pushing one piston while pulling the other in each cylinder and the cylinders are 180 degrees out of phase.

Joe

Bernd:
This looks like a redesign of the Fairbanks-Morse diesel engine used in subs and railroad locomotives. They were two cycle opposed piston engines. I believe they had two crankshafts though.

Bernd

Edit: Just did a quick Wiki check. Nice cut away veiw of that engine. Here's the LINK.

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