Abstract: A fuel injector assembly for a fuel-actuated fuel injector includes an injector body, and an injection control valve assembly. The injector body includes therein a low-pressure fuel passage extending from a clamping face to an armature cavity to convey spent actuating fuel to the armature cavity. The fuel injector assembly also includes a flushing drain formed by the injector body and fluidly connected to at least one of a valve pin bore in the injector body or the armature cavity. The flushing drain forms, together with the low-pressure fuel passage and the armature cavity, a cooling circuit for the spent actuating fuel. The flushing drain extends to a drain opening formed in an outer body surface of the injector body. Related methodology is also disclosed.

Abstract: A valve assembly for a fuel pump is provided. The valve assembly may include an inlet valve limited to a first range of travel extending between a fully closed position and a fully opened position of the inlet valve, a valve pin coupled to the inlet valve, an armature pin selectively engaging the valve pin, and an armature coupled to the armature pin and limited to a second range of travel extending between an engaged position and a disengaged position that is less than the first range of travel.

Abstract: A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.

Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.

Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.

Abstract: A valve assembly for a fuel pump is provided. The valve assembly may include an inlet valve limited to a first range of travel extending between a fully closed position and a fully opened position of the inlet valve, a valve pin coupled to the inlet valve, an armature pin selectively engaging the valve pin, and an armature coupled to the armature pin and limited to a second range of travel extending between an engaged position and a disengaged position that is less than the first range of travel.

Abstract: A pumping mechanism is disclosed. The pumping mechanism may include a barrel formed of a barrel substrate and including a first end surface, a second end surface opposite the first end surface, and a bore between the first and second end surfaces. Each of the first and second end surfaces and the bore is coated with a metal plating. The pumping mechanism may further include a plunger formed of a plunger substrate and configured to be slidably disposed in the bore in barrel, the plunger substrate having a tribological coating.

Abstract: An actuator for a fuel injector provided. The actuator includes an armature that defines a socket. Further, the armature includes an end wall. The actuator also includes a pin that includes a first end and a second end. The first end is slidably received within the socket of the armature, and the second end is in contact with a valve element. The actuator further includes a first stop positioned within the socket between the first end and the end wall. The actuator includes a second stop disposed about a second end of the pin outside of the socket.

Abstract: An after-treatment device that includes a diesel particulate filter (DPF) requiring periodic regeneration includes a sensor providing a signal indicative of a soot accumulation and at least one device providing an operating parameter indicative of a work mode of the machine. A controller determines a soot level and a readiness level based on the work mode of the machine, and further classifies the soot level relative to a desired range for initiating a regeneration event and initiates the regeneration event when the soot level falls within the desired range.

Abstract: A dual fuel system includes liquid and gaseous fuel supplies and a fuel injector in fluid communication therewith. A gaseous fuel check in the fuel injector forms a leak path with a fuel injector body between gaseous and liquid fuel passages, and a leakage limiting seal is positioned about the gaseous fuel check and deformable into sealing contact with the gaseous fuel check responsive to an increase in a pressure drop from the liquid fuel passage to the gaseous fuel passage in the fuel injector.

Abstract: A dual fuel system includes liquid and gaseous fuel supplies and a fuel injector in fluid communication therewith. A gaseous fuel check in the fuel injector forms a leak path with a fuel injector body between gaseous and liquid fuel passages, and a leakage limiting seal is positioned about the gaseous fuel check and deformable into sealing contact with the gaseous fuel check responsive to an increase in a pressure drop from the liquid fuel passage to the gaseous fuel passage in the fuel injector.

Abstract: A fluid injector unit for use in an exhaust treatment system includes; a fluid injector having a fluid receiving end and a fluid injecting end, a heater disposed about the fluid injecting end of the fluid injector, an electrical contact member electrically connected to the heater, and a thermal ground disposed about a distal end of the electrical contact member from the heater.

Abstract: A method of introducing a reducing agent into an exhaust stream may include injecting the reducing agent into the exhaust gas stream using a reducing agent injector. The method may further include selectively heating a nozzle of the reducing agent injector to reduce residue on the nozzle.

Abstract: An exhaust treatment device for a combustion system is disclosed. The exhaust treatment device may have a housing, and an injector disposed within the housing to deliver an injection fluid into a flow of exhaust. The exhaust treatment device may also have at least one fluid supply passage that is disposed within the housing and being in fluid communication with the injector to supply the injector with injection fluid. The exhaust treatment device may further have at least one purge passage disposed within the housing and in fluid communication with the injector to supply the injector with a purge fluid. The exhaust treatment device may additionally have a first valve element that is mounted to the housing and disposed at an entrance of the at least one purge passage The first valve element may be configured to provide a unidirectional flow of purge fluid to the at least one purge passage.

Abstract: A method of retrofitting an engine with an exhaust system is disclosed. The method may include placing an exhaust treatment device in an exhaust duct of the engine, and placing an exhaust heater in fluid communication with the exhaust duct of the engine at a location upstream of the exhaust treatment device. The method may further include connecting an air supply passage at a first end to an inlet duct of the engine at a location downstream of a compressor and at a second end to the exhaust heater. The method may additionally include placing a restrictor valve in the inlet duct of the engine at a location downstream of the first end of the air supply passage.

Abstract: A regeneration device for use in an exhaust treatment system is disclosed. The regeneration device has a first housing with a plurality of passages configured to receive coolant and injection fluid. A second housing is secured to the first housing and configured to receive coolant and injection fluid. The second housing has at least one cooling recess annularly disposed within the second housing to receive and circulate coolant in proximity to a tip end of the second housing.

Abstract: A regeneration device is disclosed. The regeneration device may include a housing and a perforated plate. The housing may have a passage configured to receive a flow of combustion air, and a separate bore configured to receive an electrical device. The perforated plate may be mounted to the housing to at least partially define an air chamber. Furthermore, the regeneration device may include at least one purge passageway located to communicate combustion air from the air chamber with the bore.

Abstract: An after-treatment device that includes a diesel particulate filter (DPF) requiring periodic regeneration includes a sensor providing a signal indicative of a soot accumulation and at least one device providing an operating parameter indicative of a work mode of the machine. A controller determines a soot level and a readiness level based on the work mode of the machine, and further classifies the soot level relative to a desired range for initiating a regeneration event and initiates the regeneration event when the soot level falls within the desired range.

Abstract: A method of introducing a reducing agent into an exhaust stream may include injecting the reducing agent into the exhaust gas stream using a reducing agent injector. The method may further include selectively heating a nozzle of the reducing agent injector to reduce residue on the nozzle.

Abstract: A regeneration device is disclosed. The regeneration device may include a housing and a perforated plate. The housing may have a passage configured to receive a flow of combustion air, and a separate bore configured to receive an electrical device. The perforated plate may be mounted to the housing to at least partially define an air chamber. Furthermore, the regeneration device may include at least one purge passageway located to communicate combustion air from the air chamber with the bore.