Method of operating a hydrogen internal combustion engine
AssigneePhinia Delphi Luxembourg Sarl
InventorsGavin Dober, Walter Piock
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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.
Claims13
A method of operating a hydrogen internal combustion engine which is adapted to burn hydrogen fuel with oxygen to generate mechanical energy, the hydrogen internal combustion engine having at least one cylinder with an intake valve and a direct injector for injecting the hydrogen fuel directly into the cylinder, which hydrogen fuel is a gaseous fuel that comprises at least 90% of hydrogen in elementary form, wherein 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 comprising performing an adjustment process that includes, if a pre-ignition is detected in one cylinder in one engine cycle, adjusting at least one injection parameter, which is one of said first and second injection parameters, for a following engine cycle and/or for another cylinder, wherein the at least one injection parameter is adjusted so that a total injection amount that is injected during one engine cycle is maintained constant.
An engine system with an hydrogen internal combustion engine which is adapted to burn hydrogen fuel with oxygen to generate mechanical energy, which hydrogen fuel is a gaseous fuel that comprises at least 90% of hydrogen in elementary form, the engine having at least one cylinder with an intake valve and a direct injector for injecting hydrogen fuel directly into the cylinder and an engine control unit configured to control the engine to perform a plurality of hydrogen fuel injections before an ignition during an engine cycle so that 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 engine control unit further being configured to perform an adjustment process that includes, if a pre-ignition is detected in one cylinder in one engine cycle, adjusting at least one injection parameter, which is one of said first and second injection parameters, for a following engine cycle and/or for another cylinder, wherein the at least one injection parameter is adjusted so that a total injection amount that is injected during one engine cycle is maintained constant.
Dependencies are inferred from the claim text.