| 1 MINUTE READ

Opposed-Piston Engine Developer Touts 2027 Diesel Emissions Capabilities

Achates moves closer to production, starting with commercial vehicles

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

“At a time when the industry is contemplating many technology options to address clean energy, it’s important to have pragmatic solutions in the conversation that can have more immediate impact, and meeting or beating the most stringent regulations with less cost and complexity and no reliance on enabling infrastructure is compelling,” asserts David Crompton, president and CEO of San Diego-based Achates Power.

The Engine

Achates 3-cylinder 10.6-liter diesel (Image: Achates)

In this case, the pragmatic solution Crompton is referring to is Achates’ opposed-piston engine, which promises to meet more stringent emissions requirements with current aftertreatment systems—and without having to switch to electrified drivetrains.

The Tests

Crompton is celebrating recent tests that showed Achates’ 3-cylinder 10.6-liter opposed-piston diesel engine complies with pending 2027 emissions requirements.

The Results

In the tests, which were conducted in San Diego and Detroit, the heavy-duty diesel mill measured:

  • 0.02 grams per brake hp-hour of nitrogen oxide emissions, meeting 2027 California requirements that cut NOx levels by 90%
  • 422 g of carbon dioxide, which is 8% below the current U.S. Environmental Protection Agency standard of 460 g CO2 and 2% under 2027 targets

Why It Matters

The results were achieved with a conventional exhaust fluid injection aftertreatment system, which Achates boasts is more efficient, cheaper and less complex than conventional engines and aftertreatment approaches.

What’s Next?

Achates has been developing the technology, which eliminates the cylinder head and valve train, since 2004. (Others have been at it since the 1930s.)  

The tests results are another step in the validation and commercialization processes.

In addition to commercial vehicles, Achates is working on applications for passenger cars, military vehicles and stationary applications. 

RELATED CONTENT

  • Building by Bonding: BMW, the i3 and Carbon Fiber

    BMW brings carbon fiber into mass production: reducing vehicle weight, parts, and production time.

  • Can You Glue A Car Together?

    I'm not talking about a plastic Revell model of a '57 Chevy, but a real vehicle, one that rolls off an assembly line in 1999 with another 99,999 just like it right behind. Is it possible, or is this just a fantasy of the marketing department at Elmer's?

  • The Lexus GX 470: You Want Me To Drive This Where?

    According to Kunihiro Hoshi, chief engineer for the GX 470: “Three of my top goals were to create a body-on-frame vehicle with sweeping off-road performance and unibody-like on-road capability, and, of course, it had to meet the Lexus quality standard.” He met his goals. But why would anyone want to bang this vehicle around on rocks?