Fuel injection system for hydrogen gas
AssigneePhinia Delphi Luxembourg Sarl
InventorsAnthony John Williams, Nicholas More, Daniel Pearce
Life of this patent
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Abstract
A controller for determining an injection strategy for a fuel injector within a hydrogen fuel injection system within an engine, the controller comprising: an input arranged to receive an engine operating parameter and a pressure signal associated with the pressure of hydrogen fuel available for injection from the injector in the fuel injection system; a processor arranged to determine an injection strategy for the injector in dependence on the received pressure signal and engine control parameter, the determined injection strategy comprising one or more injector control signals to control operation of the fuel injector; an output arranged to output the one or more control signals to the fuel injector.
Claims12
A controller for determining an injection strategy for a fuel injector within a hydrogen fuel injection system within an engine, the controller comprising:
- an input arranged to receive an engine operating parameter and a pressure signal associated with the pressure of hydrogen fuel available for injection from the injector in the fuel injection system;
- a processor arranged to determine an injection strategy for the injector in dependence on the received pressure signal and engine control parameter, the determined injection strategy comprising one or more injector control signals to control operation of the fuel injector;
- and
- an output arranged to output the one or more control signals to the fuel injector,
- wherein the engine comprises an engine cylinder having a cylinder piston which is driven by means of a crankshaft between bottom dead center (BDC) and top dead center (TDC) to perform a compression stroke, the determined injection strategy comprising, in dependence on the received pressure signal, one or more of:
- a pilot injection of hydrogen fuel into the combustion chamber late in the compression stroke;
- a pilot injection of hydrogen fuel into the combustion chamber followed by a main injection of hydrogen fuel into the combustion chamber late either side of top dead center (TDC);
- and
- a pilot injection of hydrogen fuel into the combustion chamber early in the compression stroke.
A method for determining an injection strategy for a fuel injector within a hydrogen fuel injection system within an engine, the engine comprising an engine cylinder having a cylinder piston which is driven by means of a crankshaft between bottom dead center (BDC) and top dead center (TDC) to perform a compression stroke, the method comprising:
- receiving an engine operating parameter and a pressure signal associated with the pressure of hydrogen fuel available for injection from the injector in the fuel injection system;
- determining an injection strategy for the injector in dependence on the received pressure signal and engine control parameter, the determined injection strategy comprising one or more injector control signals to control operation of the fuel injector;
- and
- outputting the one or more control signals to the fuel injector, wherein the determined injection strategy comprising, in dependence on the received pressure signal, one or more of:
- a pilot injection of hydrogen fuel into the combustion chamber late in the compression stroke;
- a pilot injection of hydrogen fuel into the combustion chamber followed by a main injection of hydrogen fuel into the combustion chamber late either side of top dead center (TDC);
- and
- a pilot injection of hydrogen fuel into the combustion chamber early in the compression stroke.
Dependencies are inferred from the claim text.