Achates they really came with 44 mpg at 6 Nov 2018

[CGiron]

https://www.youtube.com/watch?v=usmauFigpzk&feature=youtu.be

44 mpg, 270 hp and some 479 lb/ft of heavy torque

From NAIAS 2018
But the bigger bombshell was his announcement that of the nine automakers who have signed on as development partners, at least one of them has begun tooling up to build an opposed-piston engine in volume.
GM or Ford?

 

[2004LB7]

Here is a good review and explanation of the engine. Unfortunately like many other concepts and prototypes it has a low probability of actually making it into a production vehicle

https://youtu.be/UxON-HIlz5E

PS: this thread is likely in the wrong location

 

[DAVe3283]

If someone is actually tooling up to build that design it probably won't be GM. GM has managed to stay competitive with every engine technology change while still using the same basic push-rod design. It is kind of impressive, really.

The part I really want to know is how they are dealing with NOx emissions. They admit super high combustion and exhaust temperatures (hence the high fuel economy), but than means high NOx. I bet they use a SCR system like the 2011+ diesels. Diesel Exhaust Fluid: now for your gas truck!

Sorry if I seem cynical, but I have yet to see any evidence this will do what they say while meeting emissions, let alone longevity, production costs, etc. But we will see, maybe I'll eat my words.

 

[LBZ]

That thing sounds hideous. I can’t see it making it to production like that.

 

[2004LB7]

Kind of sounds like a lawnmower

 

[PureHybrid]

If someone is actually tooling up to build that design it probably won't be GM. GM has managed to stay competitive with every engine technology change while still using the same basic push-rod design. It is kind of impressive, really.

The part I really want to know is how they are dealing with NOx emissions. They admit super high combustion and exhaust temperatures (hence the high fuel economy), but than means high NOx. I bet they use a SCR system like the 2011+ diesels. Diesel Exhaust Fluid: now for your gas truck!

Sorry if I seem cynical, but I have yet to see any evidence this will do what they say while meeting emissions, let alone longevity, production costs, etc. But we will see, maybe I'll eat my words.

The guy states high in-cylinder egr

 

[NC-smokinlmm]

Sounds awful...

 

[darkness]

Sounds like a 2-stroke diesel lol.

 

[SmokeShow]

I'd drive it.

 

[Mike L.]

I'd drive it.

Me too. If they build it; it might be my next truck.:coolspot:

 

[2004LB7]

Me too. If they build it; it might be my next truck.:coolspot:

I would have no problem driving one either

If the HP and torque numbers are what they say and the MPG is true, it would make a great daily driver

 

[NC-smokinlmm]

I'd guess ford bc the test bed is an F150 and I'd bet they needed help with systems integration...

 

[Utahski]

Achates used to make injectors for a British diesel manufacturer, and do dyno testing for different companies. I'm surprised to see that opposed cylinder thing actually driving around. A good friend worked at Achates for several years some time back when they were developing it. He was the guy who put it together and then took it apart when it broke. Then put the "fixes" back together, then took it apart when the "fixes" didn't work. Did this for 4yrs. He's a very savvy engine guy and said the whole thing was a goatf#ck, frustrated the hell out of him to see what was going on. One problem after another and one bs fix after another. The project was funded (back then) by venture capital. At that time the whole purpose was never to produce an engine, rather to sell the engine rights to someone else and create patents along the way. The head of the company is a very convincing sales guy and was able to keep money flowing from investors. Took forever to actually get a running engine. It actually made decent power. They could keep one running long enough to show but never keep it going with much longevity. I'd take the 44mpg gallon claim with a big dose of skepticism. The thing sure sounds crappy.