DEVELOPMENT AND DEMONSTRATION OF A HEAVY-DUTY HYDROGEN INTERNAL COMBUSTION ENGINE THE OBJECTIVE OF THIS PROJECT IS TO DELIVER A DIRECT INJECTION, LEAN-BURN, SPARK-IGNITED HYDROGEN FUELED HEAVY DUTY INTERNAL COMBUSTION ENGINE (H2-ICE) THAT IS ULTRA-LOW OXIDES OF NITROGEN (NOX) COMPLIANT TO THE USEPA 2027 STANDARDS USING AN H2 BASED SELECTIVE CATALYST REDUCTION (SCR).