| [ Total Views: 856 | Total Replies: 11 | Thread Id: 100730 ] |
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 DubbyFan
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| posted on February 2nd, 2013 at 08:48 PM |
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Horizontally opposed engine
A friend recently sent me this interesting story about a new type of horizontally opposed engine with a link to VW. Not all together new a chap in New
Zealand came up with a very similar engine in 1902, Richard Pearce but that is another story.
This is no wimp engine.
It's a two cylinder with four pistons delivering 300+ Horse Power It's extremely small and very efficient and is presently in use in test
applications. The configuration below is equivalent to a extremely ballsy four cylinder engine. When doubled, it's an extremely ballsy 600+ H.P.
engine
It’s called OPOC (Opposed Piston Opposed Cylinder), and it’s a turbocharged two-stroke, two-cylinder, with four pistons, two in each cylinder,
that will run on gasoline, diesel or ethanol. The two pistons, inside a single cylinder, pump toward and away from each other, thus allowing a cycle
to be completed twice as quickly as a conventional engine while balancing its own loads.
The heavy lifting for this unconventional concept was performed Prof. Peter Hofbauer. During his 20 years at VW, Hofbauer headed up, among other
things, development of VW’s first diesel engine and the VR6.
The OPOC has been in development for several years, and the company claims it’s 30 percent lighter, one quarter the size and achieves 50 percent
better fuel economy than a conventional turbo diesel engine.
They’re predicting 100 MPG in a conventional car.
For a good demo, See:
http://www.engineeringtv.com/video/Opposed-Piston-Opposed-Cylinder
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smithy68
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| posted on February 2nd, 2013 at 10:25 PM |
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Fantastic, great technical video, thanks.
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ClockworkMonkey
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| posted on February 3rd, 2013 at 09:47 AM |
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Very interesting!
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vwo60
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| posted on February 3rd, 2013 at 10:05 AM |
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Just a remake of the deltek, doxford and the engine used in the Commer knocker, the principal has been around as stated for years, but also in use,
there was no mention in the program about were it had been used before.
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bajachris88
A.k.a.: Chris Leete
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| posted on February 3rd, 2013 at 10:57 AM |
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The benefit of a Commer or this 'two cylinder' engine principal, is when it comes to registration, you register your vehicle based on the number of
cylinders not pistons :P.
SO if you had an 8 piston engine with the same setup (4 cylinders), you'd only register it as a 4 cylinder haha. brilliant!
(ô_!_/ô) (ô_!_/ô)
69' baja: kombi box, thing spindles, irs, disc front, type 3 rear drums, 2 inch lift kit, 31x10 rears. 
New engine in process: 94mm p&bs, 74mm C/w chomol Crank, 35.5x39 SP heads, turbo. Wierd combo, hopeful torque monsta! |
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Smiley
A.k.a.: Daniel Stephens
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| posted on February 3rd, 2013 at 11:36 AM |
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Looks pretty cool.
That video was from 2008, I wonder if anything has come of this?
Smiley 
If you said I was a Volkswagen man, you'd be right.
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ancientbugger
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| posted on February 3rd, 2013 at 02:31 PM |
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It'll probably go the way of the Sarridge (?) engine, bought out by some big manufacturer then put away somewhere where it'll not bother anyone.
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whathaveidone
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| posted on February 3rd, 2013 at 02:50 PM |
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Hopefully the new ones wont scream like the commers did!!!!
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vwo60
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| posted on February 3rd, 2013 at 04:01 PM |
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Its a two stroke so it probaly will.
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Lucky Phil
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| posted on February 3rd, 2013 at 07:21 PM |
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| Quote: | Originally
posted by ancientbugger
It'll probably go the way of the Sarridge (?) engine, bought out by some big manufacturer then put away somewhere where it'll not bother anyone.
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Saritch, I believe. Ralph Saritch from memory. Based in WA.
Developed the Orbital Engine. A new style of internal combustion engine and quite revolutionary.
He went on to develop a new style of 2 stroke engine for small cars.
Last I heard (around '88) he was about to sign a deal for using them in outboard boats.
Then nothing since.
Wonder where he is now?
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vlad01
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| posted on February 4th, 2013 at 08:32 PM |
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seen this video ages ago few years now.
no one mentioned the revetec?
there is no crank in these engine and that key to their effency and massive torque.
NA petrol version reached 39.5% effecient.
Now a diesl in the works. could reach 50 or 60% effciency
http://www.youtube.com/watch?v=Q57ugVBMEeg&feature=plcp
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE |
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vlad01
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| posted on February 4th, 2013 at 08:52 PM |
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| Quote: | Originally
posted by ancientbugger
It'll probably go the way of the Sarridge (?) engine, bought out by some big manufacturer then put away somewhere where it'll not bother anyone.
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just looked into this, aprently the engine design had too many fundimental problems to get to production stage.
after reading how it works, sounds crap to be honest.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE |
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