| CPC F02D 41/0027 (2013.01) [F02D 41/068 (2013.01); F02D 2200/021 (2013.01); F02D 2200/023 (2013.01); F02D 2200/0611 (2013.01)] | 7 Claims |
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1. A hydrogen-diesel dual-fuel engine, comprising:
an engine block, comprising;
a cylinder, wherein the cylinder is outfitted with at least two hydrogen fuel injectors; and
a piston, wherein the piston is enclosed by the cylinder and wherein the piston comprises a piston crown;
an air-handling system, comprising:
an intake manifold;
an intake pipe, wherein the intake pipe receives air through an air inlet and carries the air to the intake manifold;
an exhaust pipe, wherein the exhaust pipe receives exhaust gases and expels, at least a portion, of the exhaust gases;
a variable geometry turbocharger coupled to the intake pipe and the exhaust pipe; and
an exhaust gas recirculation system configured to recirculate exhaust gases from the exhaust pipe to the intake manifold;
a two-step camshaft, wherein the two-step camshaft is configured with the air-handling system for exhaust re-breathing and late intake valve closing;
a port fuel injector system directly integrated with the intake manifold, wherein the port fuel injector system provides hydrogen gas to the at least two hydrogen fuel injectors;
a diesel injector configured to inject diesel into the cylinder;
a common-rail fuel injection system configured to supply diesel to the diesel injector;
a plurality of sensors, comprising:
a temperature sensor, and
a tachometer; and
a controller configured to receive engine data from the plurality of sensors and to control operation of the hydrogen-diesel dual-fuel engine,
wherein the controller is configured to collectively operate the two-step camshaft, exhaust gas recirculation system, and variable geometry turbocharger to maintain the production of NOx below 2 g/kWh.
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