The global need for clean and fuel-efficient engines continues to increase, which is why Achates Power has developed a two-stroke, opposed-piston engine that is not only dramatically more fuel efficient, but also clean--meeting EPA 2010 and  Euro 6 standards--and low cost.  Unlike its four-stroke counterparts, the Achates Power engine benefits from several fundamental design advantages, including:

• Opposed-Piston Architecture
  Eliminating the engine's cylinder heads by positioning two pistons per cylinder working in opposite, reciprocating motion reduces the surface area-to-volume ratio compared to conventional engines.  This reduces energy lost via heat transfer and, in turn, increases thermal efficiency. 

• Optimal Stroke-to-Bore Ratio
  A longer stroke-to-bore ratio improves scavenging and minimizes pumping losses as well as results in reduced heat transfer, which increases thermal efficiency and decreases heat rejection to coolant.

• Three-Cylinder Configuration
  A three-cylinder configuration maintains turbocharger energy while eliminating negative cross-charging effects.

• Patented Combustion System
  The patented Achates Power combustion system--including fuel injector design and configuration, piston bowl design and port design--is proven to have a short burn duration, high indicated thermal efficiency and low pumping losses.

For more information, read our technical papers or visit our blog.  

You can also attend today's presentation at the Ground Vehicle Systems Engineering & Technology Symposium (GVSETS):  Modernizing the Opposed-Piston Engine for More Efficient Military Ground Vehicle Applications.

Intake and exhaust events occur simultaneously in two-stroke engines. However, by using advanced engineering tools, Achates Power optimizes the scavenging process to take advantage of the inherent uniflow scavenging and long stroke-to-bore ratio of our opposed-piston engine architecture. Watch the video.

• Ground Vehicle Systems Engineering & Technology Symposium
  August 15 at 4:00 p.m. in Dearborn, MI
  Presenting: Modernizing the Opposed-Piston Engine for More Efficient Military Ground Vehicle Applications
   
• SAE 2012 Heavy Duty Vehicles Symposium
  September 30 - October 1 in Chicago, IL
  Presenting: Modernizing the Opposed-Piston, Two-Stroke Diesel Engine for Clean, Efficient Transportation
   
• 7th International MTZ Conference Heavy-Duty, On- and Off-Highway Engines
  November 6 at 3:30 p.m. in Nuremberg, Germany
  Presenting: Modernizing the Opposed-Piston, Two-Stroke Diesel Engine for More Efficient Commercial Vehicle Applications
   
• SIAT 2013
  January 9 - 12 in Pune, India
  Presenting:  Modernizing the Opposed-Piston, Two-Stroke Diesel Engine for Clean, Efficient Transportation