R&D of High Pressure Direct Injection Hydrogen Engine SYstems for Heavy Duty Vehicles

Abstract

By applying high pressure direct injection of 20 MPa in SI hydrogen engines, high output power compatible to conventional natural aspirated diesel engine and low NOx emissions were achieved in addition to CO2 emissions and PM free which is the feature of the engine system. It was also predicted by driving mode trace simulation that NOx level of a quarter of the new-long-term regulation target by JE05 driving mode would be realized with combination of EGR and NSR catalyst(NOx Storage and Reduction catalyst).