HIGH POWER, ULTRA-LOW EMISSIONS HD H2 ENGINE THIS PROJECT AIMS TO DEVELOP A HYDROGEN (H2) FUELED HEAVY-DUTY (HD) INTERNAL COMBUSTION ENGINE (ICE) WHICH WILL ENABLE HIGH SPECIFIC POWER (>100% DIESEL ENGINE POWER), HIGH EFFICIENCY (PARITY WITH DIESEL ICE BASELINE; =44%), AND ULTRA-LOW EMISSIONS (<0.04 G/KWH NRTC NOX). THIS WILL BE DONE BY MODIFYING AN EXISTING OFF-ROAD DIESEL ICE PLATFORM FOR H2 COMBUSTION USING A SUITE OF ENGINE COMPONENTS THAT INTO ACCOUNT THE MATERIAL COMPATIBILITY, DURABILITY, WATER MANAGEMENT, THERMAL MANAGEMENT, AND SEALING REQUIREMENTS OF H2 SYSTEMS.