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Post by pdxjim on Jan 10, 2020 20:58:19 GMT 1
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Post by kostas on Jan 10, 2020 22:18:15 GMT 1
Does this mean that current teenagers will be riding 4 stroke bikes 20 years from now and get the usual “what a f**k is that!!! you are killing the planet mate!’’ at the traffic lights...??
Kostas
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Post by steve h on Jan 10, 2020 22:30:29 GMT 1
 Its just a matter of cleaning emissions... and time and money and tech and research.. etc.
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Post by pdxjim on Jan 10, 2020 22:34:48 GMT 1
Cleaning up emissions by going to 2Ts!
What will they think of next? 🤣
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Mad Biker
Drag-strip hero
We lead others try and follow.
Posts: 243
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Post by Mad Biker on Jan 10, 2020 22:44:51 GMT 1
I bet Honda wont like that!
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Post by earthman on Jan 10, 2020 22:45:26 GMT 1
Cleaning up emissions by going to 2Ts! That just doesn't make sense does it?  |
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Post by steve h on Jan 10, 2020 23:44:24 GMT 1
I bet Honda wont like that! They'll come round to it... just like after the NR500... The article might be a leaked april fools joke or someone has found new materials that require a very small amount of lubrication or developed a 2t diesel? (old hat.. refined might be more fitting!) |
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Post by cb250g5 on Jan 11, 2020 10:20:39 GMT 1
Modern, direct injection, 2 strokes are pretty clean. You can blow the air in, rather than compress it in the crankcases and use a fuel injector. Or simpler, just use crankcase compression for the air & use a computer controlled oil pump to add the right amount of oil direct to the bottom end.
In either case you don't add fuel until after the exhaust port has closed, so no unburnt hydrocarbons going straight through to the exhaust.
My 1927 Scott has deflector pistons. A bit like a ski ramp on top of the pistons, so the incoming charge gets sent up into the dome of the head, rather than rushing across the piston and out the exhaust. Designed long before they understood about tuned length exhausts etc.
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Deleted
Deleted Member
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Post by Deleted on Jan 13, 2020 14:31:06 GMT 1
Evinrude E-tec, Mercury Optimax outboards have a similar system
Most of it stemmed from the Orbital Engine Company started by Ralph Sarich in 1972 Perth W Australia
it was based on the Wankel Rotary engine found in RX-5, 7 etc, an engine was not really produced, the engine could never be properly lubricated or cooled, it could also be driven by air or steam and used as a pump, however the combustion process Orbital Combustion Process was produced
OCP was fitted to the 3 cylinder Suzuki 2 stroke car engines, after that Sarich built his own engine, it produced 67kW but only weighed 41kg, it produced more power than GM's 1.6L 4 stroke J engine that weighed 128kg
From memory he sold off the rights to Mercury Marine, OMC (Evinrude/Can Am if you like), VW did some trials as did Fiat, the OCP was also installed in Aprilia two stroke scooters
The intellectual property made Sarich a very rich man, as far as I know no reliable Orbital engine was ever produced
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Post by steven on Jan 14, 2020 9:30:59 GMT 1
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Post by cb250g5 on Jan 14, 2020 10:32:22 GMT 1
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Post by earthman on Jan 20, 2020 22:19:21 GMT 1
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