Hydrogen combustion demonstration using opposed-piston compression ignition

National laboratory research

National laboratory research

Energy policy and regulation

Engine design and development

A combustion cycle that completes in two strokes of the piston, combined with compression ignition technology. When applied to hydrogen fuel, this approach leverages hydrogen's low ignition energy and high reactivity.

A type of engine that burns hydrogen as fuel, similar to traditional internal combustion engines but with challenges related to fuel storage and efficiency.

An engine design featuring two pistons operating in opposition within a single cylinder, eliminating the need for cylinder heads. This design was originally developed over a century ago and is now being adapted for hydrogen combustion in long-haul vehicles.

United States

A collaborative research project between Achates Power and Argonne National Laboratory to develop a hydrogen-powered engine using opposed-piston, two-stroke compression ignition technology customized for commercial long-haul vehicles that are difficult to electrify.

A hydrogen-powered internal combustion engine using opposed-piston, two-stroke compression ignition technology designed for commercial long-haul vehicles. The design eliminates cylinder heads, reduces heat loss and inefficiency, and offers lighter weight and simpler construction compared to conventional engines.