Abstract: An ignition system for an internal combustion engine includes an igniter having an igniter housing with a combustion prechamber formed therein, and a piston movable within the igniter housing to increase a pressure of an ignition charge of fuel and air within the combustion prechamber to an autoignition threshold. The ignition system includes a hydraulic actuator to apply an actuating force to the piston. Related methodology is disclosed.

Abstract: A controller for an internal combustion engine is configured to operate the engine at a desired output power and at a desired air/fuel ratio provided in the cylinder, the desired air/fuel ratio depending on an amount of air, the primary fuel, and the secondary fuel provided to the cylinder selectively; gradually increase a power output of the engine during a transient event from an initial power output, to an intermediate power output, and then to a final power output; during the transient event, simultaneously with the power output increase, increase the amount of the primary fuel and the secondary fuel to produce a rich air/fuel ratio in the cylinder.

Abstract: An ignition system for an internal combustion engine includes an igniter having an igniter housing with a combustion prechamber formed therein, and a piston movable within the igniter housing to increase a pressure of an ignition charge of fuel and air within the combustion prechamber to an autoignition threshold. The ignition system includes a hydraulic actuator to apply an actuating force to the piston. Related methodology is disclosed.

Abstract: A controller for an internal combustion engine is configured to operate the engine at a desired output power and at a desired air/fuel ratio provided in the cylinder, the desired air/fuel ratio depending on an amount of air, the primary fuel, and the secondary fuel provided to the cylinder selectively; gradually increase a power output of the engine during a transient event from an initial power output, to an intermediate power output, and then to a final power output; during the transient event, simultaneously with the power output increase, increase the amount of the primary fuel and the secondary fuel to produce a rich air/fuel ratio in the cylinder.

Abstract: An ignition system for an engine is disclosed. The ignition system may have an igniter connected to selectively ignite a fuel mixture within the engine, at least one sensor configured to sense operation information of the engine and generate corresponding signals, and a controller in communication with the igniter and the at least one sensor. The controller may be configured to cause a first striking of the igniter to ignite the fuel mixture, make a determination that the fuel mixture has been ignited by the igniter based on the signals, and selectively cease striking of the igniter based on the determination.

Abstract: An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.

Abstract: An ignition system for an engine is disclosed. The ignition system may have an igniter connected to selectively ignite a fuel mixture within the engine, at least one sensor configured to sense operation information of the engine and generate corresponding signals, and a controller in communication with the igniter and the at least one sensor. The controller may be configured to cause a first striking of the igniter to ignite the fuel mixture, make a determination that the fuel mixture has been ignited by the igniter based on the signals, and selectively cease striking of the igniter based on the determination.

Abstract: An engine having at least a primary and secondary fuel supplies is configured to operate by determining a fueling mode for each of first and second groupings of cylinders, independently. A method, therefore, for operating the engine includes monitoring engine operating parameters with an electronic controller, determining an engine operating point based on the engine operating parameters, calculating a first operating mode of a first cylinder grouping based on the engine operating point, calculating a second operating mode of a second cylinder grouping based on the engine operating point, and selectively activating at least one of a diesel injector, a gaseous fuel injector and a spark device in each engine cylinder separately and selectively for each cylinder of the first and second cylinder grouping based on the engine operating point.

Abstract: The disclosure describes a system for pressurizing a fluid. The system includes a source of liquid fuel, a pressure build chamber in fluid communication with the source of liquid fuel such that the pressure build chamber is configured to receive a volume of liquid fuel from the source, wherein the pressure build chamber is configured to heat a portion of the volume of liquid fuel to a sufficient temperature to convert the portion of the volume of liquid fuel into a gaseous fuel or supercritical fluid, and wherein the pressure build chamber is configured to increase a pressure of a fluid in the pressure build chamber to a threshold pressure to inject the gaseous fuel or supercritical fluid into an engine.

Abstract: A NOx control system includes a lean NOx catalyst and an alcohol generator. The lean NOx catalyst includes a substrate and a hydrocarbon selective catalytic reduction (HC-SCR) catalyst disposed on the substrate. The HC-SCR catalyst catalyzes a reduction of NOx with an alcohol. The alcohol generator generates the alcohol.

Abstract: A NOx control system includes a lean NOx catalyst and an alcohol generator. The lean NOx catalyst includes a substrate and a hydrocarbon selective catalytic reduction (HC-SCR) catalyst disposed on the substrate. The HC-SCR catalyst catalyzes a reduction of NOx with an alcohol. The alcohol generator generates the alcohol.

Abstract: The disclosure describes a system for pressurizing a fluid. The system includes a source of liquid fuel, a pressure build chamber in fluid communication with the source of liquid fuel such that the pressure build chamber is configured to receive a volume of liquid fuel from the source, wherein the pressure build chamber is configured to heat a portion of the volume of liquid fuel to a sufficient temperature to convert the portion of the volume of liquid fuel into a gaseous fuel or supercritical fluid, and wherein the pressure build chamber is configured to increase a pressure of a fluid in the pressure build chamber to a threshold pressure to inject the gaseous fuel or supercritical fluid into an engine.

Abstract: A control system for an engine including a fuel delivery system and an ignition source is provided. The control system includes a detector, a processor, and at least one actuator. The detector is configured to sense a signal to change from a compression ignited fuel to a spark ignited fuel. The processor is configured to receive the signal from the detector and generate an actuation signal. The actuator is configured to receive the actuation signal, vary an operating speed of the engine, and selectively control at least one of the fuel delivery system and the ignition source.

Abstract: A control system for a dual-fuel engine is disclosed. The control system may have a gaseous fuel injector having a nozzle located at a first air intake port of a cylinder of the engine and configured to inject a variable amount of gaseous fuel radially into the cylinder based on at least one of a load and speed of the engine. The control system may also have a liquid fuel injector configured to inject a fixed amount of liquid fuel axially into the cylinder based on the at least one of the load and speed of the engine. The control system may additionally have a regulator configured to selectively adjust a flow of gaseous fuel to the gaseous fuel injector and at least one sensor configured to generate a signal indicative of a performance parameter of the engine. The control system may also have a controller in communication with the regulator and the at least one sensor. The controller may be configured to selectively cause the regulator to adjust the flow of gaseous fuel based on the signal.

Abstract: A dual fuel engine system is provided. The dual fuel engine system includes a dual fuel engine. The dual fuel engine system also includes a turbocharger connected to the dual fuel engine having a turbine portion and a compressor portion. The dual fuel engine system further includes a methane reduction module positioned downstream of the turbocharger. The methane reduction module is configured to receive a flow of exhaust gas from the turbine portion of the turbocharger. The methane reduction module includes a combustor. The methane reduction module is adapted to increase a temperature of the exhaust gas flow received from the turbine portion of the turbocharger. The methane reduction module is also adapted to combust methane constituents present in the exhaust gas based on the increase in the temperature.

Abstract: A fuel system for an engine is disclosed. The fuel system may have a first fuel injector configured to inject a first stream of gaseous fuel radially into a combustion chamber of a cylinder of the engine through a first air intake port. The fuel system may also have a second fuel injector configured to inject a second stream of gaseous fuel radially into the combustion chamber through a second air intake port to collide with the first stream of gaseous fuel.

Abstract: A fuel system for an engine is disclosed. The fuel system may have a gaseous fuel injector configured to inject gaseous fuel radially into a cylinder of the engine. The fuel system may also have a primary cooling line configured to circulate coolant through the engine. The fuel system may also have an auxiliary cooling line fluidly connecting the primary cooling line with the gaseous fuel injector.

Abstract: An internal combustion engine operates on a six-stroke combustion cycle including a first compression stroke, a first power stroke, a second compression stroke, and a second power stroke. A first fuel charge is introduced to a combustion chamber of the engine at a first fuel rate during the first compression and/or first power stroke to produce lean exhaust gasses. A second fuel charge is also introduced to the combustion chamber during the second compression and/or second power stroke to normally produce lean exhaust gasses. Periodically, the second fuel charge can be increased to a second fuel rate to produce stoichiometric rich exhaust gasses. A lean nitrogen oxide trap can be disposed in an exhaust system associated with the engine to temporarily trap nitrogen oxides. Once saturated, the LNT can be periodically regenerated by production of the rich exhaust gasses.

Abstract: An internal combustion engine includes at least one cylinder having a reciprocable piston, an intake system directing intake air to the at least one cylinder, and an exhaust system directing exhaust gasses from the at least one cylinder. A first fuel injector disposed to inject a first fuel into the cylinder, and a second fuel injector disposed to inject a second fuel into said cylinder. At least one intake valve of said cylinder is configured to open and close with a variable timing in accordance with a Miller thermodynamic cycle. An exhaust gas recirculation system, provides exhaust gas to said cylinder through the intake valve. An electronic controller is disposed to monitor and receive at least one input signal indicative of the operating conditions of the internal combustion engine, and adjusts at least the amount of exhaust gas recirculation.

Abstract: A six-stroke engine system including an engine with a combustion chamber including an exhaust valve that expels exhaust gasses during an exhaust stroke, and a blowdown exhaust valve that expels blowdown exhaust gasses during recompression. An intake line directs air into the combustion chamber, and an exhaust line directs exhaust gasses from combustion chamber. A blowdown exhaust line directs blowdown exhaust gasses out of the combustion chamber and into the intake line. The blowdown exhaust gasses are expelled through the blowdown exhaust valve during recompression, and exhaust gasses are expelled through the exhaust valve during the exhaust stroke.