Abstract: A method of operating a hydrogen internal combustion engine having at least one cylinder with an intake valve and a direct injector for injecting hydrogen fuel directly into the cylinder. The method comprises performing a plurality of hydrogen fuel injections before an ignition during an engine cycle, wherein a first injection, with a first injection amount m1 and a first injection time t1 as first injection parameters, is performed before the intake valve is closed and a second injection, with a second injection amount m2 and a second injection time t2 as second injection parameters, is performed by the direct injector after the intake valve has been closed and before an ignition is performed. The method further comprises performing an adjustment process.

Abstract: A hydrogen regulation module for a hydrogen internal combustion engine includes a common body that defines therein a gas flow path for a hydrogen stream, the gas flow path extending from an inlet port to an outlet port the common body integrating: a shut off valve to selectively open or close the flow of hydrogen through the gas flow path; a pressure regulating valve configured to regulate the pressure of the hydrogen stream towards the outlet; a purge valve configured to allow purging the gas flow path downstream of the shut off valve; a first pressure relief valve in fluid communication with the gas flow path downstream of the shut off valve and of the pressure regulating valve; and a filter unit to retain particles beyond a predetermined particle size, arranged upstream of the shut off valve and pressure regulating valve. A temperature sensor and a pressure sensor on the hydrogen stream are upstream of the shut off valve and of the pressure regulating valve.

Abstract: A method of operating a hydrogen internal combustion engine having at least one cylinder with an intake valve and a direct injector for injecting hydrogen fuel directly into the cylinder. The method comprises performing a plurality of hydrogen fuel injections before an ignition during an engine cycle, wherein a first injection, with a first injection amount m1 and a first injection time t1 as first injection parameters, is performed before the intake valve is closed and a second injection, with a second injection amount m2 and a second injection time t2 as second injection parameters, is performed by the direct injector after the intake valve has been closed and before an ignition is performed. The method further comprises performing an adjustment process.

Abstract: A method of operating a water injection system for a combustion engine, the system comprising an injector for injecting water at least indirectly into the combustion engine and a pump for pumping water from a tank through a feed line to the injector. In order to improve the dynamic performance of a water injection system for a combustion engine, the invention provides that the method comprises the steps of: determining if there is a current demand for water injection; if there is no current demand, checking at least one predefined standby condition to determine if, starting from a current pump performance, it is possible to meet a potential future demand for water injection; and increasing the pump performance if at least one standby condition is fulfilled and decreasing or deactivating the pump if no standby conditions are fulfilled.

Abstract: A method of operating a water injection system for a combustion engine, the system comprising an injector for injecting water at least indirectly into the combustion engine and a pump for pumping water from a tank through a feed line to the injector. In order to improve the dynamic performance of a water injection system for a combustion engine, the invention provides that the method comprises the steps of: determining if there is a current demand for water injection; if there is no current demand, checking at least one predefined standby condition to determine if, starting from a current pump performance, it is possible to meet a potential future demand for water injection; and increasing the pump performance if at least one standby condition is fulfilled and decreasing or deactivating the pump if no standby conditions are fulfilled.