First 2027 CARB NOx-regs-compliant diesel engine put into service

April 8, 2022

Achates Power has announced that the heavy-duty diesel engine it developed in a project funded by the California Air Resources Board (CARB) and several partners has entered fleet service with Walmart in a Peterbilt 579 tractor.

The company says this is the only diesel engine operating on the road capable of meeting CARB’s 2027 regulation, which requires a 90% reduction in emissions of nitrogen oxide (NOx) compared to current standards.

The project team also demonstrated that the engine, known as a heavy-duty opposed-piston diesel engine, reduces carbon dioxide (CO2) by 10%. The Achates Power ultra-low-NOx engine is engineered to achieve superior fuel efficiency because of its lower heat losses, improved combustion and reduced pumping losses, the company adds.