Results from the demonstration indicate that the technology would offer broad application, and the ability to meet the California Air Resources Board’s 2027 ultralow NO x regulations by a substantial margin.
Walmart will be piloting the engine in a Peterbilt 579 truck for their California operations later this year, and Achates Power is already working with a group of organizations to commercialize a heavy duty engine for series production in 2027.
Achates Power successfully built and tested four 10.6L opposed-piston engines for the Heavy Duty Diesel Demonstration Programme, an initiative funded by various agencies in California. Measured results from the demonstrations show the engines achieving a 96% reduction in tailpipe NOx, a 75% reduction in engine-out particle matter compared to benchmark diesel engines, and a 7% reduction in carbon dioxide compared to U.S. regulatory standards.
The results were achieved with conventional, underfloor aftertreatment systems, making them significantly cheaper and less complex than other solutions.