摘要:
The present disclosure relates to fuel systems. Some embodiments of the teachings may include a fuel pump comprising: a pump piston having a longitudinal centerline; a camshaft with at least one cam; a roller tappet arranged between the pump piston and the cam; and a tappet body and a roller rotatably held on the roller tappet. The pump piston and the tappet body may be movement-coupled with regard to movements in directions parallel to the piston longitudinal centerline. The roller may be in contact with the cam. The longitudinal centerline may intersect a geometric axis of rotation of the roller. The tappet body defines a tappet body longitudinal centerline parallel to the piston longitudinal centerline. The tappet body longitudinal centerline, in a projected view oriented parallel to the geometric axis of rotation of the roller, runs with a lateral spacing to the piston longitudinal center line.
摘要:
A fuel injector includes an injection-port forming member, a passage forming member, and a positioning member. The passage forming member is in contact with the injection-port forming member. The positioning member that is a partially ring shape spans and is externally fitted to the injection-port forming member and the passage forming member, and executes a positioning between the injection-port forming member and the passage forming member. The injection-port forming member and the passage forming member include continuous flat surfaces that can be connected with each other, respectively. The positioning member includes an opposite flat surface that faces both the continuous flat surfaces in a case where the positioning member is externally fitted to the injection-port forming member and the passage forming member, and a pressing portion that inwardly presses the outer peripheral wall portions such that the continuous flat surfaces are in contact with the opposite flat surface.
摘要:
A fuel injector includes a body, filter, and damper member. The body extends along a longitudinal axis between an inlet end and an outlet end and has a wall defining a flow passage extending therebetween. The filter is disposed in the flow passage proximate the inlet end. The damper member is secured to the flow passage between the inlet end and the filter. The damper member has outer and inner surfaces surrounding the longitudinal axis, the outer surface being contiguous to the wall of the flow passage to define at least one circumferential band about the longitudinal axis in the flow passage. The inner surface defines an aperture that extends through the damper member to permit fluid communication between the inlet end and the filter. A damper member is also shown and described. A method of reducing sound in the valve group subassembly is also disclosed.
摘要:
Provided is a high-pressure fuel supply pump capable of fixing a cylinder to a pump body with excellent sealability in a simple structure even at a high fuel pressure.A high-pressure fuel supply pump including a pump body in which a pressurizing chamber is formed, and a cylinder inserted into a hole formed in the pump body and formed in a cylindrical shape, the high-pressure fuel supply pump including: a protrusion disposed at an end portion of the pump body opposite to the pressurizing chamber, formed from an outer peripheral side to an inner peripheral side with respect to an inner peripheral surface opposite to an outer peripheral surface of the cylinder, and protruding toward the cylinder, wherein the protrusion is formed so as to protrude to a side opposite to the pressurizing chamber with respect to a flat portion of the end portion of the pump body, and the protrusion is formed so as to support the cylinder from a side opposite to the pressurizing chamber.
摘要:
A fuel rail assembly for an internal combustion engine is disclosed. It includes a main gallery and a plurality of fuel delivery outlets. Each fuel delivery outlet has an injector cup and an injector cup mounting connection arranged between the main gallery and the injector cup. A fixing bracket is adapted to fasten the main gallery to the engine. The fixing bracket is spaced apart from the injector cup and secured to the main gallery. A fastening element is provided to secure the fixing bracket to the engine. A rigid connection member is coupled to the fixing bracket extends between the fixing bracket and one of the injector cup and the injector cup mounting connection.
摘要:
A fuel injection system for an internal combustion engine may include at least one distributor unit to supply liquid fluid and a plurality of preheating systems each connected to the distributor unit. The respective preheating systems may have a preheating chamber and at least one heating element. A plurality of connection nozzles may each be connected to respective preheating systems. A fuel path may lead from the distributor unit through the respective preheating chambers to the respective injection nozzles of the plurality of preheating systems. The respective preheating systems may include a housing having an inlet and an outlet. The housing may be connected via a plug-in connection on the inlet to the distributor unit and via a plug-in connection on the outlet to the respective injection nozzle.
摘要:
A fuel injector, including a valve insert and a plug extrusion coating, is described, the valve insert including a valve seat and a valve housing. The valve housing has an alignment device, which is equipped to align the valve insert in an injection molding die, and the plastic extrusion coating has a second alignment device which is equipped to align the fuel injector during assembly in an internal combustion engine.
摘要:
A fuel injector which includes an actuator having an electrical contact element, a plug, a fuel supply pipe, and an injection-molded housing part. The plug has a base body, an electrical connection element for an electrical connection with the electrical contact element of the actuator, and a rib which projects from the base body, the injection-molded housing part surrounding the electrical connection element of the plug and being injection-molded on the rib of the plug and the fuel supply pipe.
摘要:
A fuel injector assembly for an emissions-based EMD 710 locomotive dieselengine. The fuel injector assembly includes a needle slidably positioned within a bore of a valve body of the injector assembly, where fuel pressure introduced into a bore chamber causes the needle to open a spray tip. A spring mounted within the bore forces the needle to close the spray tip when the fuel is not being applied. The spring is a dead coil spring including inactive coils where at least portions of the coils at both ends of the spring are in intimate contact with each other so as to reduce spring wear during operation of the assembly. Because the dead coil spring has reduced wear, the VOP set point of the fuel injector assembly can be reduced, which reduces NOx emissions.
摘要:
A fuel injection valve for internal combustion engines, having a valve body that has a guide bore, in which a valve member is axially displaceably guided for controlling an injection cross section, and that is braced with its end face remote from the combustion chamber axially against a valve holding body via an intermediate disk, and a pressure chamber, formed by a cross-sectional enlargement of the guide bore, is provided in the valve body and can be filled with high fuel pressure via a pressure conduit that penetrates the valve body, the intermediate disk, and the valve holding body. The portion of the pressure conduit extending within the valve body is embodied as an oblique bore, which has an angle of inclination of between 15 and 35° to the longitudinal axis of the fuel injection valve.