An engine design they think is new 3

[enginesrus]

https://www.youtube.com/watch?v=Ov73-okhkG0

I wonder if Fairbanks Morse knows about this? They still make the OP engines, and have been using this architecture for I don't know how many years. And why would they say the idea was abandoned in the 40's? The hype for some of these supposed great IC engine ideas is just getting old.

 

[Marquis]

Hi Hemi, how are you?

I agree, Ive often seen ego-centric 'larger than life' characters starting up these Start up companies who schmooze the VC companies and bowl them over. Unfortunately , good engineers are more often than not more data driven, balanced, transparent with less emphasis on Ego....

It would need to be an OEM with a long term view and a horizon much longer than the next quarter!

http://www.auto-scape.com

Sideways To Victory!

 

[Lou Scannon]

I'm well thank-you. I landed on my feet with a major turbocharging mfr after 6 months unemployment in 2012-2013. Maybe see you in the pub as well?

"Schiefgehen wird, was schiefgehen kann" - das Murphygesetz

 

[RodRico]

Well, if Achates opposed-piston is a hoax, they fooled Cummins and the US Army. See "Cummins developing revolutionary new diesel engine for U.S. Army" at

http://www.foxnews.com/auto/2017/10...lutionary-new-diesel-engine-for-u-s-army.html

 

[gruntguru]

The "Achates" engine version being developed with Cummins is just a 3 cylinder Junkers Jumo (OP 2 stroke diesel with geared crankshafts). Conceived over 100 years ago. I don't think Achates have done much beyond incorporating the latest management and injection technology. The Jumo 204 had BSFC of 212 g/kW.hr in 1932. Marquis says above that Achates were at 194 g/kW.hr.

je suis charlie

 

[enginesrus]

And wow that news head line. Revolutionary design?????? Come on Fairbanks Morse has and still is making this design, it is NOTHING NEW. The only thing new is a much cheaper upper crankshaft drive system. I wonder how durable it is?

 

[BrianPetersen]

A lot of those projects exist to milk research money out of various government programs, not to actually produce anything useful as an end result. Once in a while, something useful actually does come out of such research.

... but not very often.

 

[CWB1]

Agreed. I helped coordinate quite a few of both government and collegiate "research" projects for a major OEM. As mentioned above they're usually all about the money and not the technology, either collecting grants or tax write-offs. The ironic part for me was cross-referencing these projects with older work documented in private corporate archives, several led to patents and papers that would've been someone else's previously had the original project actually led to something worthwhile.

 

[Marquis]

For a military application where high specific output is a priority along with compact size, and less heat rejection to coolant (the Opposed Piston engine tends to reject more heat to exhaust than coolant). Its no surprise its been selected. The military doesn't require particularly high durability either.
It also has an inherent transient response advantage- if that was a priority for big trucks.
I don't see this solution sweeping the nation of our line haul applications.

I could be wrong- whereby high BHP/litre becomes a priority in trucks over high efficiency and durability lol

http://www.auto-scape.com

Sideways To Victory!

 

[enginesrus]

I predict 2 stroke diesel engines will make a come back. In my opinion Fairbanks Morse is the best of the best, now
reporting 50% efficiency. And in the reciprocating world only 2 strokes do that as far as I know. I wonder how many copy cats like the one this thread is about that will be made?

 

[RodRico]

They're all "copycats" of Junkers' well known Jumo-205 engine introduced in 1932 (

https://en.wikipedia.org/wiki/Junkers_Jumo_205).

Because the architecture is well established prior art, Achates's patents are founded on design details rather than the concept.

 

[Gary_321]

Deltic locomotives took opposed piston engines to a whole new level...

[URL unfurl="true"]https://www.youtube.com/watch?v=D3bj47TAYiU[/url]

Not very practical for automobiles, but an interesting engine to see in action.

 

[waross]

We can't forget the Commer Knocker.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[MikeHalloran]

Find lots of Deltic info starting at:
ptfnasty.com
... some links lead to audio recordings of Deltic-powered locomotives.
The sound is haunting.
No way would they meet modern emissions requirements.


Mike Halloran
Pembroke Pines, FL, USA

 

[waross]

And do't forget the Detroit Diesel 2-51 and 4-51.
Theses were valveless engines with one piston per cylinder.
Both the intake and the exhaust were ported.

Bill
--------------------
"Why not the best?"
Jimmy Carter