2 Stroke Tech

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1/22/2019 5:16 PM

May not be Moto related but..
I saw an interesting technical paper presentation today at the SAE Powertrains, Fuels, and Lubricants Conference in San Antonio. The research done by the University of Bath in UK studied 6 types of 2 stroke scavenging applications for automotive purpose. They found that the opposed piston two stroke (OP2S) was the most ideal for light/medium duty applications. This type of engine is already very popular in the heavy duty diesel world. Would be cool to see a single cylinder, dual piston/crank motocross bike, though probably not worth the trouble developing. Thought some of you jerkies might be interested...

SAE Paper 2019-01-0071
https://www.sae.org/publications/technical-papers/content/2019-01-0071/

Achates Opposed Piston



Scuderi 2 stroke (though R&D stopped on this years ago it's still interesting)
https://en.wikipedia.org/wiki/Scuderi_engine

Burt-McCollum Sleeve Valve (A sleeve between the piston and cylinder that moves relative to each and opens ports at ideal times.)
https://en.wikipedia.org/wiki/Sleeve_valve

Sleeve valve 12 cylinder DI Rolls Royce
https://en.wikipedia.org/wiki/Rolls-Royce_Crecy
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1/22/2019 5:48 PM

This is by far the most educational post I’ve ever seen on this website. Unfortunately people don’t come here to learn.

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1/22/2019 6:02 PM

The concept of the Achates Engine is pretty amazing. Some new technology that hopefully breaks through to the masses.

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1/22/2019 6:02 PM
Edited Date/Time: 1/22/2019 6:04 PM

ktmdan wrote:

May not be Moto related but..
I saw an interesting technical paper presentation today at the SAE Powertrains, Fuels, and Lubricants Conference in San Antonio. The research done by the University of Bath in UK studied 6 types of 2 stroke scavenging applications for automotive purpose. They found that the opposed piston two stroke (OP2S) was the most ideal for light/medium duty applications. This type of engine is already very popular in the heavy duty diesel world. Would be cool to see a single cylinder, dual piston/crank motocross bike, though probably not worth the trouble developing. Thought some of you jerkies might be interested...

SAE Paper 2019-01-0071
https://www.sae.org/publications/technical-papers/content/2019-01-0071/

Achates Opposed Piston



Scuderi 2 stroke (though R&D stopped on this years ago it's still interesting)
https://en.wikipedia.org/wiki/Scuderi_engine

Burt-McCollum Sleeve Valve (A sleeve between the piston and cylinder that moves relative to each and opens ports at ideal times.)
https://en.wikipedia.org/wiki/Sleeve_valve

Sleeve valve 12 cylinder DI Rolls Royce
https://en.wikipedia.org/wiki/Rolls-Royce_Crecy

ktmdan, had sent you a pm in another thread on the Christini
Email me at: deanulve@gmail.com
Thanks, Dean

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What can be asserted without evidence can also be dismissed without evidence.

1/22/2019 6:22 PM

ktmdan wrote:

May not be Moto related but..
I saw an interesting technical paper presentation today at the SAE Powertrains, Fuels, and Lubricants Conference in San Antonio. The research done by the University of Bath in UK studied 6 types of 2 stroke scavenging applications for automotive purpose. They found that the opposed piston two stroke (OP2S) was the most ideal for light/medium duty applications. This type of engine is already very popular in the heavy duty diesel world. Would be cool to see a single cylinder, dual piston/crank motocross bike, though probably not worth the trouble developing. Thought some of you jerkies might be interested...

SAE Paper 2019-01-0071
https://www.sae.org/publications/technical-papers/content/2019-01-0071/

Achates Opposed Piston



Scuderi 2 stroke (though R&D stopped on this years ago it's still interesting)
https://en.wikipedia.org/wiki/Scuderi_engine

Burt-McCollum Sleeve Valve (A sleeve between the piston and cylinder that moves relative to each and opens ports at ideal times.)
https://en.wikipedia.org/wiki/Sleeve_valve

Sleeve valve 12 cylinder DI Rolls Royce
https://en.wikipedia.org/wiki/Rolls-Royce_Crecy

ChristopherHitchens wrote:

ktmdan, had sent you a pm in another thread on the Christini
Email me at: deanulve@gmail.com
Thanks, Dean

Oh dang it. I've been on here over ten years, since motodrive days, and I still don't know how to get to my PMs. I'll shoot you an email after I finish my honey do's this evening.

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1/22/2019 7:18 PM

ktmdan wrote:

Oh dang it. I've been on here over ten years, since motodrive days, and I still don't know how to get to my PMs. I'll shoot you an email after I finish my honey do's this evening.

K, Thnx!

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What can be asserted without evidence can also be dismissed without evidence.

1/22/2019 8:12 PM

When we were all on 2 strokes....we were doin' it right!! Till the OEM's brought in the fart boxes and eff'd the rules and everything else up!! Don't dare bring in logic on the mechanical's of how motors work in the real world......has a tendency to ruffle all the feather's who believed everything the OEM's forced down our throats! Well.....most of us anyways.

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And there goes Jeffro. One of God's own prototypes. A super high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.

Pimpin' Ho's , Rollin' fatty's......drinkin' beers , beers , beers!! ~ Ja

1/22/2019 8:53 PM

Dude what a solid post, I love the Engineering Explained channel

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If it can't be fixed with a hammer, it's an electrical problem.

1/22/2019 9:09 PM

There's been a similar conversation on TT Beta this week:

Photo

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2015 Beta 500 RS, history: 99 KTM 300, 87 CR250, 84 KLR 600, 82 GPZ 550, 81 KX 250, 80 KX 250, 79 Montesa 414 VE, 78 250 VB, 77 360 VB, 76 360 VA, 75 YZ 125, 74 TM 125, 72 TS 125, 60's West Bend Go Boy Kart