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Old Apr 10, 2012, 02:44 PM
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Re inventing the internal combustion engine

Claims up to 50% reduction in fuel consumption.

This actually looks like it would work.

http://video.foxnews.com/v/3929622/r...ing-the-engine
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Old Apr 10, 2012, 02:54 PM
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I am curious about the power output compared to a "conventional" engine as well as the lifespan comparison.
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Old Apr 10, 2012, 03:49 PM
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Ancient - Puch (Austrian company who made a lot of bikes) had a 'split single' two-stroke eons ago!

There you go - it's all here http://en.wikipedia.org/wiki/Split-single
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Old Apr 10, 2012, 03:52 PM
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Originally Posted by ENGINETORQUE View Post
Ancient - Puch (Austrian company who made a lot of bikes) had a 'split single' two-stroke eons ago!

There you go - it's all here
The guy in the video said it was not an original idea, just that his father had made some "innovative" improvements.

Modern refinements might make it worth looking into once again, no?
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Old Apr 10, 2012, 03:56 PM
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Originally Posted by P-51C View Post
The guy in the video said it was not an original idea, just that his father had made some "innovative" improvements.

Modern refinements might make it worth looking into once again, no?
Yep I did catch that

Well if you check out some of the big beastly outboard motor two-strokes - same thing, with sofware controlling the injection and ignition Mercury have done some amazing things with the two-stroke engine.

It's interesting but internal combustion engines are at their peak development and we're still stuck on 4 stroke valved engines - even formula one!
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Old Apr 10, 2012, 06:36 PM
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Originally Posted by ENGINETORQUE View Post
Ancient - Puch (Austrian company who made a lot of bikes) had a 'split single' two-stroke eons ago!

There you go - it's all here http://en.wikipedia.org/wiki/Split-single
Who could forget the twingle?
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Old Apr 10, 2012, 07:03 PM
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It looks like a supercharged two-stroke diesel, but one cylinder is the supercharger instead of a Roots blower.

Is it gasoline fueled?
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Old Apr 10, 2012, 09:04 PM
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maine
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Figures the american car companies aren't interested.
Boy if that type engine can deliver. People wouls save a great deal. Just think less fuel used and bought , less in taxes paid.and less polution. "Our gov't will have none of this"!...It will hurt our oil companies profit margins and might help us get away from those crazy people in the middleast. we cant have that now can we.
Besides, the american car companies can just ask for another Bailout when needed....
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Old Apr 11, 2012, 04:51 AM
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Figures the american car companies aren't interested.
Boy if that type engine can deliver. People wouls save a great deal. Just think less fuel used and bought , less in taxes paid.and less polution. "Our gov't will have none of this"!...It will hurt our oil companies profit margins and might help us get away from those crazy people in the middleast. we cant have that now can we.
Besides, the american car companies can just ask for another Bailout when needed....
I don't think that's the bottom line - most of the Euro hatchback Diesels now turn nearly 70 MPG from 2 litres and 150 BHP, so efficiency is way up compared with the V8 petrols of a few years back!

Hybrids are making progress too - Diesel Hybrids now from France!

At the end of the day any I/C engine is simply a pump - fewer moving parts mean less friction to sap power - containing the heat means less loss thermally, the answer for I/C engine efficiency is to run the engine as hot as possible and reduce the frictional losses - I don't see this engine achieving either!
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Old Apr 11, 2012, 05:40 AM
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It's still inherently a two stroke, with a possibly higher specific output than an equivalent four stroke, but with the disadvantages of lower fuel efficiency and dirtier emissions.
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Old Apr 11, 2012, 06:24 AM
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It's still inherently a two stroke, with a possibly higher specific output than an equivalent four stroke, but with the disadvantages of lower fuel efficiency and dirtier emissions.
The emmissions thing shouldn't be worse than a four-stroke if the burn is achieved as envisaged - the only reason piston ported two strokes are so messy is that A - they are 'lubricated by accident' and B the overlap with the porting and tuned exhaust system means that effectively (efficiency wise) they are a one speed device!

A great deal of the fuel put through a two-stroke is donated to the atmosphere from the exhaust and never gets burned - in essence an engine that fires every stroke should be able to outperform one that fires every other!

Interesting stuff - I've been 'messing' with the subject for decades and still the poppet valved four-stroke remains king and that's a 'rubbish' idea mechanically!
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