Opposed Piston 2-Stroke Engine

• Potential for Hydrogen operation - [1]
• In July 2021, Cummins was awarded an $87M contract by the United States Army to complete the development of the Advanced Combat Engine (ACE), a modular and scalable diesel engine solution that uses opposed-piston technology. [2]
• Typical 4 stroke fuel-specific oil consumption is .1 percent, and opposed piston engines need to match this to be competitive

OSE Proposal for Hydrogen Hydraulic Engine

• Piston-ported exhaust with overhead valve with direct hydraulic pumping on the opposite side, with pilot-flow cylinder return. May need Hydraulic Accumulator for smoothing.
• Lubrication is via hydraulic fluid, which addresses the lubrication and oil-burn issue of regular 2-strokes, as no oil is used in the fuel