Abstract: A reciprocating engine system includes a turbocharger system including a mechanically driven compressor, an electrically driven compressor, and a compressor bypass valve. A control system is programmed for generating control signals for: under nominal full load operating conditions, minimizing gas flow through the compressor bypass valve and compressing gas within the electrically driven compressor to maintain a speed set point or a full load power set point of the reciprocating engine system, under off nominal full load operating conditions wherein an efficiency of the mechanically driven compressor is reduced, compressing gas within the electrically driven compressor to compensate for the reduced efficiency of the mechanically driven compressor and to maintain the speed set point or the full load power set point of the reciprocating engine system, and under partial load operating conditions, partially diverting the gas flow through the compressor bypass valve in response to the reduced load.

Abstract: A reciprocating engine system includes a turbocharger system including a mechanically driven compressor, an electrically driven compressor, and a compressor bypass valve. A control system is programmed for generating control signals for: under nominal full load operating conditions, minimizing gas flow through the compressor bypass valve and compressing gas within the electrically driven compressor to maintain a speed set point or a full load power set point of the reciprocating engine system, under off nominal full load operating conditions wherein an efficiency of the mechanically driven compressor is reduced, compressing gas within the electrically driven compressor to compensate for the reduced efficiency of the mechanically driven compressor and to maintain the speed set point or the full load power set point of the reciprocating engine system, and under partial load operating conditions, partially diverting the gas flow through the compressor bypass valve in response to the reduced load.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: A system includes an air source, an internal combustion engine, a first turbocharger, a second turbocharger, and a third turbocharger. The first turbocharger includes a first turbine and a first compressor, the second turbocharger includes a second turbine and a second compressor, and the third turbocharger includes a third turbine and a third compressor. The third compressor is fluidly coupled to the air source and is fluidly coupled to one of the first compressor and the second compressor. The first compressor is fluidly coupled upstream of the second compressor, and the second compressor is fluidly coupled upstream of the third turbine. The third turbine is fluidly coupled upstream of the internal combustion engine.

Abstract: An assembly of a cylinder head and a fuel injector with an injector tip for an internal combustion engine with at least one combustion chamber, wherein the fuel injector at the end facing a combustion chamber of the internal combustion engine is at least partially surrounded by a heat shield, wherein in the region of the heat shield a heat dissipation device is provided, through which heat can be dissipated from the combustion chamber of the internal combustion engine, wherein the heat shield surrounds the fuel injector as far as the injector tip, wherein the heat shield is designed as a tapering collar towards the injector tip and is integrated into an injector sleeve or into the cylinder head.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: A dual-fuel internal combustion engine with a device for regulating the internal combustion engine, with at least two piston-cylinders, a fuel injector assigned to the piston-cylinder units for a liquid fuel, which has an injector needle. Each piston-cylinder unit has a gas supply device for fuel, wherein the regulating device controls the fuel injector and the at least one gas supply device individually for metering of the quantity of the liquid or gaseous fuel supplied to each piston-cylinder unit. At least one needle sensor is connected to the regulating device and assigned to the respective piston-cylinder unit, which detects a characteristic signal of the needle position in the ballistic range, so that the fuel injector can be operated with individual controllability for each of the at least two piston-cylinder units for the regulation of the supplied fuel quantity in the ballistic range.

Abstract: System for controlling an injection of fuel in an engine is disclosed. The engine includes a cylinder and a first fuel injector to inject a first fuel in the cylinder. The system includes a sensor disposed on or proximate to the first fuel injector and configured to generate an electrical signal indicative of at least one of a start of the injection and an end of the injection of the first fuel. The system further includes a controller configured to adjust at least one of a mass and the start of injection of the first fuel to be injected by the first fuel injector based on the electrical signal. A dual-fuel engine employing the system for controlling an injection of fuel in an engine is also disclosed. Moreover, method and non-transitory computer readable media for controlling an injection of the fuel are also disclosed.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: A system includes an air source, an internal combustion engine, a first turbocharger, a second turbocharger, and a third turbocharger. The first turbocharger includes a first turbine and a first compressor, the second turbocharger includes a second turbine and a second compressor, and the third turbocharger includes a third turbine and a third compressor. The third compressor is fluidly coupled to the air source and is fluidly coupled to one of the first compressor and the second compressor. The first compressor is fluidly coupled upstream of the second compressor, and the second compressor is fluidly coupled upstream of the third turbine. The third turbine is fluidly coupled upstream of the internal combustion engine.

Abstract: An assembly of a cylinder head and a fuel injector with an injector tip for an internal combustion engine with at least one combustion chamber, wherein the fuel injector at the end facing a combustion chamber of the internal combustion engine is at least partially surrounded by a heat shield, wherein in the region of the heat shield a heat dissipation device is provided, through which heat can be dissipated from the combustion chamber of the internal combustion engine, wherein the heat shield surrounds the fuel injector as far as the injector tip, wherein the heat shield is designed as a tapering collar towards the injector tip and is integrated into an injector sleeve or into the cylinder head.

Abstract: A dual-fuel internal combustion engine with a device for regulating the internal combustion engine, with at least two piston-cylinders, a fuel injector assigned to the piston-cylinder units for a liquid fuel, which has an injector needle. Each piston-cylinder unit has a gas supply device for fuel, wherein the regulating device controls the fuel injector and the at least one gas supply device individually for metering of the quantity of the liquid or gaseous fuel supplied to each piston-cylinder unit. At least one needle sensor is connected to the regulating device and assigned to the respective piston-cylinder unit, which detects a characteristic signal of the needle position in the ballistic range, so that the fuel injector can be operated with individual controllability for each of the at least two piston-cylinder units for the regulation of the supplied fuel quantity in the ballistic range.

Abstract: A system includes a controller that has a processor configured to receive a first signal from a first oxygen sensor indicative of a first oxygen measurement, wherein the first oxygen sensor is disposed upstream of a catalytic converter system; and to receive a second signal from a second oxygen sensor indicative of a second oxygen measurement, wherein the second oxygen sensor is disposed downstream of the catalytic converter system; and to execute a catalyst estimator system, wherein the catalyst estimator system is configured to derive an oxygen storage estimate based on the first signal, the second signal, and a catalytic converter model. The processor is configured to derive a system oxygen storage setpoint for the catalytic converter system based on the catalytic converter model and the oxygen storage estimate.

Abstract: A system includes a controller that has a processor configured to receive a first signal from a first oxygen sensor indicative of a first oxygen measurement, wherein the first oxygen sensor is disposed upstream of a catalytic converter system; and to receive a second signal from a second oxygen sensor indicative of a second oxygen measurement, wherein the second oxygen sensor is disposed downstream of the catalytic converter system; and to execute a catalyst estimator system, wherein the catalyst estimator system is configured to derive an oxygen storage estimate based on the first signal, the second signal, and a catalytic converter model. The processor is configured to derive a system oxygen storage setpoint for the catalytic converter system based on the catalytic converter model and the oxygen storage estimate.

Abstract: System for controlling an injection of fuel in an engine is disclosed. The engine includes a cylinder and a first fuel injector to inject a first fuel in the cylinder. The system includes a sensor disposed on or proximate to the first fuel injector and configured to generate an electrical signal indicative of at least one of a start of the injection and an end of the injection of the first fuel. The system further includes a controller configured to adjust at least one of a mass and the start of injection of the first fuel to be injected by the first fuel injector based on the electrical signal. A dual-fuel engine employing the system for controlling an injection of fuel in an engine is also disclosed. Moreover, method and non-transitory computer readable media for controlling an injection of the fuel are also disclosed.

Abstract: Systems and methods are provided for controlling exhaust gas recirculation (EGR). In one example, an engine system includes a first EGR valve coupling an exhaust manifold to an engine exhaust system, a second EGR valve coupling the exhaust manifold to an engine intake system, and a control unit. The control unit selectively adjusts a position of the first EGR valve based on a target amount, and adjusts a position of the second EGR valve based on the target amount and a position of the first EGR valve. Responsive to a first degradation condition of the first EGR valve, the control unit adjusts the position of the second EGR valve based on the target amount and based on a pressure of the first exhaust manifold, and responsive to a second degradation condition of the first EGR valve, adjusts the position of the second EGR valve based on the target amount.

Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.

Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.

Abstract: An exemplary turbocharger system for an internal combustion engine is provided. The turbocharger system includes a first turbine and a second turbine. The first turbine is in fluid communication with the internal combustion engine. The first turbine receives a first portion exhaust gas discharged from the internal combustion engine and provides a first turbine exhaust gas. The second turbine is in fluid communication with the first turbine via an inter-stage channel. The inter-stage channel transports the first turbine exhaust gas from the first turbine to the second turbine. The inter-stage channel is in thermal connection with an exhaust gas recirculation channel defined between an inlet and an outlet of the internal combustion engine. The first turbine exhaust gas flowing through the inter-stage channel is capable of being heated by a second portion exhaust gas discharged from the internal combustion engine and flowing through the exhaust gas recirculation channel.

Abstract: Various methods and systems for an engine driving an electrical power generation system are provided. In one embodiment, an example method for an engine driving an electrical power generation system includes adjusting an engine speed in response to a relationship between oxygen and fuel while maintaining a power transmitted to the electrical power generation system.