Abstract: An aftertreatment system for a diesel engine is disclosed. The aftertreatment system may include a first flow conduit configured to convey an exhaust gas stream, and a first diffuser assembly positioned fluidly downstream of the first flow conduit and be configured to increase flow uniformity of the exhaust gas stream. The first diffuser assembly may include a first disperser having a honeycomb structure surrounded by a first outer frame. The first disperser may have a number of cells per square inch defining a first cell density. The aftertreatment system may also include a first selective catalytic reduction cassette positioned fluidly downstream of the first diffuser assembly, and the first selective catalytic reduction cassette may include a selective catalytic reduction catalyst.

Abstract: An aftertreatment system for a diesel engine is disclosed. The aftertreatment system may include a first flow conduit configured to convey an exhaust gas stream, and a first diffuser assembly positioned fluidly downstream of the first flow conduit and be configured to increase flow uniformity of the exhaust gas stream. The first diffuser assembly may include a first disperser having a honeycomb structure surrounded by a first outer frame. The first disperser may have a number of cells per square inch defining a first cell density. The aftertreatment system may also include a first selective catalytic reduction cassette positioned fluidly downstream of the first diffuser assembly, and the first selective catalytic reduction cassette may include a selective catalytic reduction catalyst.

Abstract: A packaging system for enclosing an aftertreatment module associated with an engine is described. The packaging system includes a housing structure configured to enclose the aftertreatment module therein, the housing structure being coupled to an exhaust conduit of the engine. The housing structure includes a base portion and a plurality of side portions extending from the base portion. The base portion and the plurality of side portions define a chamber for receiving the aftertreatment module therein. Further, the packaging system includes a equipment rack configured to receive one or more components of the accessory system. The equipment rack includes a top end and a bottom end, the top end being distal from the bottom end and configured to couple with the base portion of the housing structure. The bottom end of the equipment rack is supported on a floor.

Abstract: An engine system includes an internal combustion engine having an exhaust system with an SCR aftertreatment mechanism and a urea injector upstream the aftertreatment mechanism. A mixing mechanism is positioned fluidly between the urea injector and the aftertreatment mechanism and includes a turbulator and a swirler structured to increase mixing of the urea and exhaust gases. Related methodology is also disclosed.

Abstract: A fuel system for an engine has a cylinder with an inlet air port, an air box surrounding the inlet air port, and a gaseous fuel injector positioned in the air box and having a nozzle located at the inlet air port. The fuel system also has a gaseous fuel control valve, a fuel supply line fluidly extending from the gaseous fuel control valve to the gaseous fuel injector, a purge valve, and a purge fluid supply line fluidly extending from the purge valve to at least one of the fuel supply line and the gaseous fuel injector. The fuel system also has a return valve and a return line fluidly extending from at least one of the fuel supply line and the gaseous fuel injector.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. Further, the engine system may have a nozzle configured to selectively inject gaseous fuel into the at least one cylinder of the engine. The engine system may also have an intake port configured to direct air for combustion to the at least one cylinder. In addition, the engine system may have exhaust valves associated with the at least one cylinder. The exhaust valves may be configured to direct exhaust from the cylinder to an atmosphere. The exhaust valves may also be configured to close at different times.

Abstract: A control system for an engine includes a variable valve timing device configured to selectively adjust opening and closing of an exhaust valve of the engine, a sensor configured to generate a signal indicative of a condition associated with pre-ignition of air and fuel in a cylinder of the engine, and a controller in communication with the variable valve timing device and the sensor. The controller is configured to control the variable valve timing device to selectively initiate a conventional valve timing or a quick-open valve timing based on the signal. In the quick-open valve timing the exhaust valve is moved from a closed position to a maximum lift position in a shorter amount of time than in the conventional valve timing.

Abstract: An engine system is disclosed for use with an engine having at least a first cylinder and a second cylinder. The engine system may have a first exhaust manifold fluidly connected to the first cylinder, a second exhaust manifold fluidly connected to the second cylinder, and a recirculation passage extending from the first exhaust manifold to at least one of the first and second cylinders. The engine system may also have a restricted orifice connecting the first exhaust manifold to the second exhaust manifold, a pressure relief passage extending from the first exhaust manifold, and a valve disposed within the pressure relief passage and movable to selectively reduce a back pressure of the first exhaust manifold.

Abstract: An airbox for an engine is provided. The airbox includes a first cylinder bank including a plurality of first cylinder sections. The airbox also includes a second cylinder bank including a plurality of second cylinder sections. The airbox further includes an isolation assembly provided in association with the first cylinder bank and the second cylinder bank. The isolation assembly is configured to isolate at least one first cylinder section of the plurality of first cylinder sections from another first cylinder section of the plurality of first cylinder sections, at least one second cylinder section of the plurality of second cylinder sections from another second cylinder section of the plurality of second cylinder sections, and the first cylinder bank from the second cylinder bank.

Abstract: A packaging system for enclosing an aftertreatment module associated with an engine is described. The packaging system includes a housing structure configured to enclose the aftertreatment module therein, the housing structure being coupled to an exhaust conduit of the engine. The housing structure includes a base portion and a plurality of side portions extending from the base portion. The base portion and the plurality of side portions define a chamber for receiving the aftertreatment module therein. Further, the packaging system includes a equipment rack configured to receive one or more components of the accessory system. The equipment rack includes a top end and a bottom end, the top end being distal from the bottom end and configured to couple with the base portion of the housing structure. The bottom end of the equipment rack is supported on a floor.

Abstract: A nozzle for a gaseous fuel injector has a converging portion, a tip connected to the converging portion, and an anti-leakage device disposed at the tip to selectively inhibit leakage of a residual gaseous fuel from the nozzle.

Abstract: A nozzle for a fuel injector is disclosed. The nozzle may have a body having a base end, a tip end, and a central bore extending from the base end to the tip end. The nozzle may also have a sac located within the central bore at the tip end. Further, the nozzle may have an orifice located within the tip end and in communication with the sac. The orifice may be skewed at an azimuthal angle relative to a radial direction of the central bore.

Abstract: A fuel system for an engine has a cylinder with an inlet air port, an air box surrounding the inlet air port, and a gaseous fuel injector positioned in the air box and having a nozzle located at the inlet air port. The fuel system also has a gaseous fuel control valve, a fuel supply line fluidly extending from the gaseous fuel control valve to the gaseous fuel injector, a purge valve, and a purge fluid supply line fluidly extending from the purge valve to at least one of the fuel supply line and the gaseous fuel injector. The fuel system also has a return valve and a return line fluidly extending from at least one of the fuel supply line and the gaseous fuel injector.

Abstract: A nozzle for a gaseous fuel injector has a converging portion, a tip connected to the converging portion, and an anti-leakage device disposed at the tip to selectively inhibit leakage of a residual gaseous fuel from the nozzle.

Abstract: An engine system is disclosed. The engine system may have an engine including at least one cylinder. Further, the engine system may have a nozzle configured to selectively inject gaseous fuel into the at least one cylinder of the engine. The engine system may also have an intake port configured to direct air for combustion to the at least one cylinder. In addition, the engine system may have exhaust valves associated with the at least one cylinder. The exhaust valves may be configured to direct exhaust from the cylinder to an atmosphere. The exhaust valves may also be configured to close at different times.

Abstract: A nozzle assembly for a gaseous fuel injector of an engine is disclosed. The nozzle assembly may include a gaseous fuel injector having a nozzle with a tip end. The nozzle assembly may also include a blocking member having an inner contact surface configured to receive a periphery of the nozzle at the tip end, and an outer contact surface configured to engage an air intake port of a cylinder and create a hermetic seal between the gaseous fuel injector and the air intake port.

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: An airbox for an engine is provided. The airbox includes a first cylinder bank including a plurality of first cylinder sections. The airbox also includes a second cylinder bank including a plurality of second cylinder sections. The airbox further includes an isolation assembly provided in association with the first cylinder bank and the second cylinder bank. The isolation assembly is configured to isolate at least one first cylinder section of the plurality of first cylinder sections from another first cylinder section of the plurality of first cylinder sections, at least one second cylinder section of the plurality of second cylinder sections from another second cylinder section of the plurality of second cylinder sections, and the first cylinder bank from the second cylinder bank.

Abstract: An engine system is disclosed. The engine system may have an engine with a plurality of cylinders, and at least one injector associated with each of the plurality of cylinders and configured to inject liquid fuel and gaseous fuel. The engine system may also have a turbocharger driven by exhaust from the plurality of cylinders to pressurize a flow of air directed into the plurality of cylinders, and a valve disposed inline with the turbocharger and configured to selectively increase an exhaust backpressure. The engine system may further have a controller configured to selectively cause movement of the valve toward a flow-restricting position only when the at least one injector is injecting gaseous fuel.

Abstract: An engine system for a machine is disclosed. The engine system may have a first intake manifold configured to distribute air into a first cylinder bank of an engine. The engine system may also have a second intake manifold configured to distribute air into a second cylinder bank of the engine. The engine system may have a first exhaust manifold configured to discharge exhaust from the first cylinder bank to the atmosphere. The engine system may further have a second exhaust manifold configured to discharge exhaust from non-donor cylinders in the second cylinder bank to the atmosphere. In addition, the engine system may have a third exhaust manifold separate from the first and second exhaust manifolds and configured to recirculate exhaust from donor cylinders in the second cylinder bank to the first and second intake manifolds.