Abstract: An engine system includes a plurality of cylinders including one or more donating cylinders and one or more non-donating cylinders. A control module controls an operation of the one or more donating cylinders relative to, or based on, the operation of the one or more non-donating cylinders.

Abstract: An engine system includes a plurality of cylinders including one or more donating cylinders and one or more non-donating cylinders. A control module controls an operation of the one or more donating cylinders relative to, or based on, the operation of the one or more non-donating cylinders.

Abstract: Exhaust gas recirculation (EGR) systems and methods are provided. In one embodiment, a method for controlling an engine includes providing a first EGR gas flow to an intake manifold of the engine by closing a first EGR valve or a second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve, wherein the first and second EGR valves are respectively positioned in first and second EGR passages respectively coupled between first and second donor cylinder groups and an intake manifold, and providing a second EGR gas flow that is higher than the first EGR gas flow to the intake manifold by fully opening the first EGR valve or the second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve.

Abstract: A diesel engine system includes a cylinder, an exhaust manifold, an exhaust gas recirculation (EGR) manifold, and a valve. The exhaust manifold is fluidly coupled with the cylinder and directs exhaust generated in the cylinder to an exhaust outlet that delivers the exhaust to an external atmosphere. The EGR manifold is fluidly coupled with the cylinder and recirculates the exhaust generated in the cylinder back to the cylinder as at least part of intake air that is received by the cylinder. The valve is disposed between the cylinder and the exhaust manifold and between the cylinder and the EGR manifold. The valve has a donating mode and a non-donating mode. The valve fluidly couples the cylinder with the EGR manifold when the valve is in the donating mode and fluidly couples the cylinder with the exhaust manifold when the valve is in the non-donating mode.

Abstract: Various methods and systems are provided for an engine. In one example, the system includes a two-stage turbocharger which has first turbocharger with a first turbine and a first compressor and a second turbocharger with a second turbine and a second compressor, where the first turbine and the second turbine are arranged in parallel and the first compressor and the second compressor are arranged in series. The system may include a duct coupling turbine inlets of the first and second turbine, and a valve coupled between the duct and the inlet of the first turbine to throttle flow to first turbine.

Abstract: Exhaust gas recirculation (EGR) systems and methods are provided. In one embodiment, a method for controlling an engine includes providing a first EGR gas flow to an intake manifold of the engine by closing a first EGR valve or a second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve, wherein the first and second EGR valves are respectively positioned in first and second EGR passages respectively coupled between first and second donor cylinder groups and an intake manifold, and providing a second EGR gas flow that is higher than the first EGR gas flow to the intake manifold by fully opening the first EGR valve or the second EGR valve and at least partially opening the other of the first EGR valve and the second EGR valve.

Abstract: An engine system is provided. The engine system includes a plurality of cylinders including one or more donating cylinders and one or more non-donating cylinders. A control module controls an operation of the one or more donating cylinders relative to, or based on, the operation of the one or more non-donating cylinders.

Abstract: A diesel engine system includes a cylinder, an exhaust manifold, an exhaust gas recirculation (EGR) manifold, and a valve. The exhaust manifold is fluidly coupled with the cylinder and directs exhaust generated in the cylinder to an exhaust outlet that delivers the exhaust to an external atmosphere. The EGR manifold is fluidly coupled with the cylinder and recirculates the exhaust generated in the cylinder back to the cylinder as at least part of intake air that is received by the cylinder. The valve is disposed between the cylinder and the exhaust manifold and between the cylinder and the EGR manifold. The valve has a donating mode and a non-donating mode. The valve fluidly couples the cylinder with the EGR manifold when the valve is in the donating mode and fluidly couples the cylinder with the exhaust manifold when the valve is in the non-donating mode.

Abstract: A system and method for waste heat recovery in exhaust gas recirculation is disclosed. The system includes an engine having an intake manifold and an exhaust manifold, an exhaust conduit connected to the exhaust manifold, and a turbocharger having a turbine and a compressor, the turbine being connected to the exhaust conduit to receive a portion of the exhaust gas from the exhaust manifold. The system also includes an EGR system connected to the exhaust conduit to receive a portion of the exhaust gas, with the EGR system including an EGR conduit that is connected to the exhaust conduit to receive a portion of the exhaust gas, a heat exchanger connected to the EGR conduit and being configured to extract heat from the exhaust gas, and a waste heat recovery system connected to the heat exchanger and configured to capture the heat extracted by the heat exchanger.

Abstract: Various embodiments of the invention relate to an intake channel of an internal combustion engine in which an adjustable position guide vane is configured to modify the velocity distribution inside the intake channel in order to vary the mean swirl number generated by the channel. The intake channel may comprise a combination of two or more ports, which can be helical or tangential, depending on their shape. By varying the velocity distribution inside the intake channel it is possible to vary the mean swirl number in an internal combustion engine. Contrary to existing systems to vary the swirl in internal combustion engines, the invention proposed does not require the separation of both ports inside the intake channel by a wall in order to achieve a variation in the swirl.

Abstract: Various embodiments of the invention relate to an intake channel of an internal combustion engine in which an adjustable position guide vane is configured to modify the velocity distribution inside the intake channel in order to vary the mean swirl number generated by the channel. The intake channel may comprise a combination of two or more ports, which can be helical or tangential, depending on their shape. By varying the velocity distribution inside the intake channel it is possible to vary the mean swirl number in an internal combustion engine. Contrary to existing systems to vary the swirl in internal combustion engines, the invention proposed does not require the separation of both ports inside the intake channel by a wall in order to achieve a variation in the swirl.

Abstract: A fuel injector (10) for an internal combustion engine (88) includes a centerbody (12) and a casing (14) disposed radially outward of the centerbody to define an annular mixing section (16) between the centerbody and the casing. The fuel injector also includes an air inlet (e.g., 18) of the mixing section for injecting a first portion (22) of combustion air into the mixing section. A fuel inlet (32) is disposed in the centerbody for injecting fuel (34) into the mixing section. A fuel conduit (48) disposed in the centerbody conducts the fuel to the fuel inlet and a valve (50) disposed in the fuel conduit selectively controls fuel injection into the mixing section. The valve may be positioned sufficiently close to the fuel inlet to provide the desired accurate timed injection. The injector also includes an outlet (19) of the mixing section for discharging a fuel/air mixture (60).

Abstract: A combustor for a gas turbine engine comprises a housing, and a swirler assembly disposed in physical communication with the housing. The swirler assembly comprises a first stage comprising a plurality of first vanes, a second stage comprising a plurality of second vanes, and a third stage comprising a plurality of third vanes. The second stage is disposed downstream of, in fluid communication with, and in physical communication with the first stage. The third stage is disposed downstream of, in fluid communication with, and in physical communication with the second stage.

Abstract: A futel injector (10) for an internal combustion engine (88) includes a centerbody (12) and a casing (14) disposed radially outward of the centerbody to define an annular mixing section (16) between the centerbody and the casing. The futel injector also includes an air inlet (e.g., 18) of the mixing section for injecting a first portion (22) of combustion air into the mixing section. A fuel inlet (32) is disposed in the centerbody for injecting fuel (34) into the mixing section. A fuel conduit (48) disposed in the centerbody conducts the fuel to the fuel inlet and a valve (50) disposed in the fuel conduit selectively controls fuel injection into the mixing section. The valve may be positioned sufficiently close to the fuel inlet to provide the desired accurate timed injection. The injector also includes an outlet (19) of the mixing section for discharging a fuel/air mixture (60).

Abstract: A combustor is provided. The combustor includes a combustor liner and a swirl premixer disposed on a head end of the combustor liner and configured to provide a fuel-air mixture to the combustor. The combustor also includes a plurality of tangentially staged injectors disposed downstream of the swirl premixer on the combustor liner, wherein each of the plurality of injectors is configured to introduce the fuel-air mixture in a transverse direction to a longitudinal axis of the combustor and to sequentially ignite the fuel-air mixtures from adjacent tangential injectors.