Found this quite interesting


http://blog.hemmings.com/index.php/2011/01/13/saving-the-world-two-strokes-at-a-time/


Oh look, it’s EcoMotors International, some new greenie-car startup company with a “revolutionary” engine design. I bet it’ll save all the polar bears while running on a blend of hemp oil, wildflowers and moonbeams.

Ha! Just what flavor of hippie vegetarian baloney is this? And what automotive genius is running this company? Let me guess: Al Gore? Ed Begley Jr? Henry David Thoreau?

Uh, well as it turns out the President and COO of EcoMotors is John Coletti, former director of Ford’s skunkworks performance division, SVT. Coletti is the guy who pushed for the Mustang to stay a rear-drive V-8 performance machine instead of becoming the forgettable front-drive that Ford sold as the unfortunately named Probe. Coletti was also on board during the 1999 SVT Cobra intake manifold debacle and the car’s subsequent comeback that culminated in the incredible 2003-’04 supercharged “Terminator” Cobra. SVT’s crowning achievement under Coletti’s watch was the Ford GT supercar – unbelievable as it seems today that Ford actually built it. Of course, there were also bread-and-butter rigs like the the SVT Contour, F-150 Lightning and SVT Focus, all excellent performance machines.

But if you think it’s nuts that a guy like Coletti has signed on with an outfit called EcoMotors, you’re really not going to believe the engine they hope to bring to market. 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.

The heavy lifting for this unconventional concept was performed not by Coletti, but by EcoMotors CEO, 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.

Hofbauer said he had the idea for the OPOC while working at VW, and was inspired by the original Beetle’s flat engine design as well as the opposed-piston, two-stroke, diesel Junkers “Jumo” aircraft engines.

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.

Earlier this year, the company received an injection of $23.5 million from Khosla Ventures and Bill Gates, and says it will have a vehicle engine ready for production by 2013.

They’re predicting 100 MPG in a conventional car.

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OBJECTS IN MIRROR ARE CLOSER THAN THEY APPEAR, ONLY IN A BENZ

89 560SEC
90 350SDL (Rudolph)
91 350SDL (300SDL drivetrain)
87 BMW 635CSi (Swanhild)
89 BMW M6 (euro)
99 Suzuki Hayabusa (Only the fastest thing ever)

sure, ok

EcoMotor's project has a turbocharger with an electric supercharger piggy backed. Zero lag

Not a new invention by any means

http://www.youtube.com/watch?v=e0sLp7wvq60
http://www.youtube.com/watch?v=p8k35_153Vw&feature=related

Also the Junkers Jumo airplane engine was famously an OPOC two stroke unit

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

"electric supercharger"

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

Paging Mr. Tucker. Paging Mr. Preston Tucker.

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)

Been discussed here before. Also see Deltic Diesel.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Gotta love how all the environmentalists jump on the bandwagon every time another "new idea" pops up.

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1982 300GD Carmine Red (DB3535) Cabriolet Parting Out
1990 300SEL Smoke Silver (Parting out)
1991 350SDL Blackberry Metallic (481)

"The thing is Bob, its not that I'm lazy...its that I just don't care."

As said above its not really new.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

there s a similar one in the Wright Patterson Airforce museum with a cutaway, was from the 40's or 50's I think.

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

Fairbanks-Morse and Junkers both made 2 stroke diesels with opposed pistons but with 2 crankshafts. I'm not sure how easy a 2 cylinder 325 hp diesel will be on the drive train.

You can get a good deal on one of those electric superchargers on ebay-and put in on your diesel! a cheapo compound setup.

I wonder how they seal the connection between the piston and the connecting rod on the "outer" piston.

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Jim

No seal is needed as the outer piston has rings just like the inner piston.

The piston "pin" on the outermost piston has got to be sealed someway over it full range of travel.

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Jim