MULTIPLE MODE OPERATION OF HYDROGEN-FUELED INTERNAL COMBUSTION ENGINE

A method of operating a hydrogen-fueled internal combustion engine 100. The engine 100 is determined to have a mode control value, which represents a threshold torque. During operation of the engine 100, a demanded torque of the internal combustion engine 100 is determined and compared to the threshold torque. If the demanded torque is less than the threshold torque, the engine 100 is operated in a low load mode that uses spark ignition and pre-mixed combustion. If the demanded torque is greater than the threshold torque, the engine 100 is operated in a high load mode that uses compression ignition and diffusion combustion.