A fuel injector includes an injector body and a valve stack within the injector body that includes a valve seat plate. The valve seat plate includes a pressure control passage for controlling fuel injection, and a valve seat positioned fluidly between the pressure control passage and a low-pressure drain. The valve seat plate includes a pressure-limiting annular groove that extends circumferentially around the valve seat and axially inward from a side of the valve seat plate where the valve seat is located. The groove enables deformation in response to pressure differences across the valve seat plate in a manner that limits stress concentrations.

Disclosed herein is a pulsation damper using a single-sided corrugated disk spring. In the pulsation damper using a single-sided corrugated disk spring, a section-expanded fuel rail inlet expanded to be equal to a section of a high-pressure fuel pipe is formed in an inlet-expanded fuel rail and a single-sided corrugated spring pulsation damper is attached to the inlet-expanded fuel rail, so that high-pressure fuel pump pulsating waves generated in the inlet-expanded fuel rail by a high-pressure fuel pump and injector pulsating waves generated in a fuel injector are mixed with each other and mixed pulsating waves generated in the inlet-expanded fuel rail are reduced.

The invention relates to a high-pressure fuel pump for supplying fuel to a first injection device of an internal combustion engine, in particular of a motor vehicle, having at least one first low-pressure port, via which the fuel can be fed to the high-pressure fuel pump from a low-pressure fuel pump for conveying the fuel, having at least one low-pressure chamber, to which at least a part of the fuel fed to the high-pressure fuel pump via the first low-pressure port can be fed, having at least one second low-pressure port, for conducting the fuel conveyed by means of the low-pressure fuel pump and fed to the high-pressure fuel pump away from the high-pressure fuel pump to a second injection device provided in addition to the first injection device.

A ring installation device for installing a ring to a part includes an inner mandrel which is tapered in order to expand the ring. An outer mandrel is tubular such that the inner mandrel is received within the outer mandrel and such that the inner mandrel is moveable within the outer mandrel along an axis. A ring stripper is tubular such that the outer mandrel is receive within the ring stripper and such that the outer mandrel is moveable within the inner mandrel along the axis. The inner mandrel is moveable along the axis relative to the outer mandrel and the ring stripper from an inner mandrel first position to an inner mandrel second position. The outer mandrel is moveable by the inner mandrel along the axis relative to the ring stripper from an outer mandrel first position to an outer mandrel second position.

A sealing cartridge (18) for an injector of an internal combustion engine seals a medium-filled first chamber (6) and a medium-filled second chamber (7). The chambers (6, 7) are between an injector (1) that is movable axially along an injector axis (9) and a housing (2) receives the injector (1). The sealing cartridge (18) is configured to receive the injector (1). The sealing cartridge (18) has at least one seal (11; 20) disposed in a receptacle housing (19) of the sealing cartridge (18). The receptacle housing (19) has a first housing portion (29) configured to receive the seal (11; 20) on the shell face (31) of the receptacle housing (19), and a second housing portion (30) configured to receive the seal (11; 20) on an internal face (25). An injector assembly (38) also is provided and has an injector (1) that is received in the sealing cartridge (18).

In metal-on-metal sealing structures, the sealing criteria employed for high pressure liquid fuel does not work when sealing gaseous fuels. A technique for sealing a gaseous fuel between gaseous fuel conduits in an internal combustion engine includes forming a contact band between two surfaces of a sealing structure between a first conduit and a second conduit. A width of the contact band is at least equal to the larger of a minimum contact pressure width where contact pressure is at least equal to a predetermined minimum contact pressure; and a minimum yield zone width where at least one of the two surfaces have plastically deformed.

A fuel injector includes an injector body and a valve stack within the injector body that includes a valve seat plate. The valve seat plate includes a pressure control passage for controlling fuel injection, and a valve seat positioned fluidly between the pressure control passage and a low-pressure drain. The valve seat plate includes a pressure-limiting annular groove that extends circumferentially around the valve seat and axially inward from a side of the valve seat plate where the valve seat is located. The groove enables deformation in response to pressure differences across the valve seat plate in a manner that limits stress concentrations.

An arrangement for supplying fuel from a fuel pressure source located on an outside of an engine enclosure to a fuel injector located on an inside of the engine enclosure includes a fuel pipe for transporting fuel from the fuel pressure source to the fuel injector via an opening in the engine enclosure, and a seal for sealing the fuel pipe at the opening. The seal includes a first part configured for a sealing contact around the fuel pipe and a second part configured for a sealing contact around a sleeve extending around the opening. An internal combustion engine provided with such an arrangement and a method for providing an internal combustion engine with such an arrangement are also provided.

A fuel line for use in a fuel-carrying vehicle designed as a one-piece multi-chamber line having at least two separate fuel-carrying lines each forming a chamber. A first chamber carries fuel in a first flow direction and a second chamber carries fuel in the first or a second flow direction. Also proposed is a correspondingly adapted connection piece for joining to such a multi-chamber line.

A connector includes: a connector body formed in a tubular shape; a valve housing formed in a tubular shape and provided inside the connector body with a seal structure interposed therebetween, the seal structure restricting flow of fuel between the valve housing and an inner circumferential surface of the connector body; and a valve body stored inside the valve housing, the valve body being configured to, when high-pressure fuel does not flow back, come into a first state in which a forward flow path is formed between the valve body and an inner circumferential surface of the valve housing by a pressure of low-pressure fuel, and when the high-pressure fuel flows back, come into a second state in which an orifice flow path having a smaller flow path sectional area than the forward flow path is formed between the valve body and the inner circumferential surface of the valve housing.