On display at ACT Expo in Las Vegas this week is what Achates Power, Inc. (API) described as the cleanest and most efficient internal combustion engine (ICE) architecture demonstrated to date.
Achates Power opposed piston engine architecture. (Photo: Achates Power)API said it has demonstrated the opposed-piston (OP) architecture is capable of using today’s aftertreatment systems to meet future ultra-low NOx emissions standards with compliance through the 800,000-mile useful life requirements. It also offers low-load, idle and off-cycle emissions capability.
In a joint demonstration with CALSTART and Walmart, an API 10.6 L engine was retrofitted into a production Class 8 truck to meet the proposed 2027 ultra-low NOx emissions standard and with an off-the-shelf current production one-box aftertreatment system, Achates noted. The company reported testing in California achieved up to 10.8 mpg on a 389-mile delivery route averaging 10% better fuel economy than baseline, with the advantage increasing to 22% on some routes.