In one aspect, a system for coupling a fuel rail of a common rail fuel system to an internal combustion engine may include an engine wall having a plurality of openings. The fuel rail may have a main pipe portion located outside the engine wall, and a plurality of outlet pipes monolithically formed with the main pipe portion, each of the plurality of outlet pipes extending into a corresponding one of the plurality of openings of the engine wall. The system may further include a seal located in sealing engagement with each of the plurality of openings and a corresponding outlet pipe.

A pipe section of a common rail line is provided for the high-pressure injection of a fluid. The pipe section has at least a first pipe and an adapter in which the first pipe has a wall and extends at least along an axial direction. The wall has an inner circumferential surface and an outer circumferential surface and encloses a first line. The adapter has a connector piece and a second pipe. The connector piece extends annularly around the first pipe and is situated on the outer circumferential surface. A second line that is formed by the second pipe is fluidically connected to the first line via a first opening in the first pipe and a second opening in the connector piece. At least the adapter is manufactured by a metal powder injection molding process. Two methods for manufacturing a pipe section are also provided.

A connection assembly is used to connect a first body to a second body. The first body includes a bore that is coaxial with a first axis, and a retainer opening that extends coaxially with a second axis. The second axis is perpendicular to the first axis and offset relative to the first axis. In addition, a portion of the retainer opening intersects the bore. The second body includes an insertion portion that is disposed in the bore, a fluid passage that extends through the insertion portion and communicates with the bore, and an outer surface of the second body has a channel. The connection assembly employs an elastic retaining pin that retains the insertion portion within the bore. The retaining pin is disposed in the retainer opening such that a portion of the retaining pin resides in the channel, and the retaining pin is self-aligning and self-retaining.

A fuel conduit connection assembly for interconnecting fuel system components of an internal combustion engine (ICE) system. The fuel conduit connection assembly includes a mounting structure for fastening a portion of the assembly to an ICE external structure; a fuel receiving conduit portion having a plurality of inlet fuel duct connections for connecting to a plurality of corresponding fuel channels of a fuel system component outside the ICE external structure, respectively; a single fuel feeding conduit portion for connecting to a fuel system component internal the ICE external structure; and a sealing arrangement arranged on an outer circumferential surface of the assembly and configured to provide sealing between a first environment and a second environment in an assembled state with the ICE external structure.

The flexibility of the attachment angle and attachment interval of the member (e.g., injector) attached to the joint member is increased to improve the flexibility of layout even in the case of the forged rail for high-pressure direct injection. In addition, the manufacturing cost can be reduced while keeping high strength of the joint portion. A rail body 1 manufactured by forging, the rail body 1 having a through hole 4 opened on a wall surface 3 for communicating a fuel passage 2 extending in an axial direction with an outside; and a tubular joint member 6 manufactured separately from the rail 1 body and fixed to the rail body 1 at a position of the through hole 4 for allowing a fuel to flow from the fuel passage 2 through the through hole 4 are provided.

A monolithic fuel rail structure is configured to receive and support a fuel injector, and includes a log, an injector cup that protrudes integrally from an outer surface of the log, and a fuel passage. An inner surface of the log defines a main fuel channel, and the injector cup includes a bore that opens at one end of the injector cup. An inlet end of the fuel injector is received in the bore. The fuel passage provides fluid communication between the bore and the main fuel channel, and the fuel passage corresponds to a portion of a hole that extends through the injector cup on each of opposed sides of the injector cup.

A connection assembly is used to connect a first body to a second body. The first body includes a bore that is coaxial with a first axis, and a retainer opening that extends coaxially with a second axis. The second axis is perpendicular to the first axis and offset relative to the first axis. In addition, a portion of the retainer opening intersects the bore. The second body includes an insertion portion that is disposed in the bore, a fluid passage that extends through the insertion portion and communicates with the bore, and an outer surface of the second body has a channel. The connection assembly employs an elastic retaining pin that retains the insertion portion within the bore. The retaining pin is disposed in the retainer opening such that a portion of the retaining pin resides in the channel, and the retaining pin is self-aligning and self-retaining.

A fastener assembly for connecting a fuel pipe to an engine component. The fastener assembly includes a housing and a fastener positioned within the housing. The housing has an end surface with an aperture for receiving a fuel pipe therethrough. At least one side wall extends from the end surface to define a recess for receiving a fastener therein. The fastener has a pipe inlet for receiving a fuel pipe therethrough, and a connecting arrangement for connecting the fastener to an engine component.

A fuel injector includes an injector housing defining a longitudinal axis, and including a body piece having formed therein a fuel inlet defining a transverse axis intersecting the longitudinal axis. The injector housing further includes a nozzle having formed therein a plurality of spray outlets, and including a nozzle terminal tip. The injector housing further includes a locating surface axially inward of the nozzle terminal tip and extending circumferentially around the nozzle. A first axial distance (AD) is defined between an intersection of the transverse axis and the longitudinal axis, and the nozzle terminal tip. An exposed tip length axial distance (TL) is defined between the locating surface and the nozzle terminal tip. A ratio of AD to TL is from 8.06 to 8.34.

A fuel injector includes an injector housing having a fuel connector, and an outer housing surface extending around a longitudinal axis of the injector housing. The outer housing surface includes a cylindrical upper section, a cylindrical lower section, and a middle section. The fuel connector defines a connector axis oriented normal to a longitudinal axis of the injector housing and extending between a first connector end attached to the middle section, and a terminal connector end radially outward of the outer housing surface and having therein a fuel inlet. The fuel connector includes an outer connector surface having an unthreaded base section, and an externally threaded end section adjacent to the terminal connector end.