A fuel injection system for fuel metering may include an injection nozzle, which includes a nozzle body, a nozzle needle, and a nozzle orifice, wherein nozzle needle is disposed in the nozzle body; a control piston configured to mechanically and electrically contact the nozzle needle in an axial direction opposite to the nozzle orifice; a transmitter configured to communicate with a controller and electrically contact the nozzle needle via the control piston; wherein the controller is configured to determine an open state and a closed state between the nozzle needle and the nozzle body via an electrical signal detected by the transmitter; and wherein the controller is configured to adjust the open state and the closed state in correlation with a fuel injection quantity.

A gas injector for injecting a gaseous fuel, in particular directly into a combustion chamber of an internal combustion engine, including: a valve closing element for opening or closing a pass-through opening, a valve body, and a sealing seat between the valve body and the valve closing element, in the case of a maximum lift of the valve closing element a flow cross section between the valve body and the valve closing element being smaller in the flow direction upstream from the sealing seat than a flow cross section between the valve closing element and the sealing seat and being smaller than a flow cross section in the flow direction downstream from the sealing seat.

A valve having an elongated main body and a substantially flat area defined within the valve between its first and second ends; wherein a stopping screw is received in said flat area so as to prevent extraction of the valve from a casing by applying a force against a portion of the valve once the valve is moved a predetermined number of turns. A method for inhibiting the turning of a valve having the steps of installing a threaded portion of a valve in a first threaded aperture through a casing, where the first threaded aperture receives the threads of the threaded portion of the valve; and threading a screw through a second threaded aperture in an exterior of the casing, where the screw, is disposed in a position to come into direct contact with the valve after a predetermined number of turns.

An internal combustion engine includes a fuel injection nozzle provided with a nozzle hole for injecting fuel, the nozzle hole exposed from a cylinder head of the internal combustion engine to a combustion chamber, and a hollow duct, an inlet and an outlet of which are exposed to the combustion chamber. The duct is provided in a manner allowing fuel spray injected from the nozzle hole of the fuel injection nozzle to pass through from the inlet to the outlet. The fuel injection nozzle and the duct are configured such that a part of fuel spray that is injected in pilot injection that is performed before main injection directly adheres to an inner wall surface of the duct.

An assembly at least comprising a fuel injector for dual fuel operation of an internal combustion engine. The assembly includes a nozzle holder defining a fuel circuit and provided with a nose adapted in use to be in connection with a combustion space of an internal combustion engine, and first and second nozzles in communication with the fuel circuit in the nozzle holder for directly injecting liquid fuel into the combustion space of the internal combustion engine for ignition of a combustible mixture present in the combustion space. The first and second nozzles adjacent to the nose of the nozzle holder are interconnected by a cooling channel. At each actuation of a fuel pump upstream of the first and second nozzles, substantially a full volume of fuel pumped during actuation of the fuel pump is allowed to flow through the cooling channel and via the first and second nozzles.

A valve assembly is provided with a valve body, a valve needle and an armature. An actuator assembly surrounds the valve assembly. The actuator assembly includes a housing and a coil. The coil can be energized so as to induce a force for axially displacing the armature. A flow characteristic of fluid to be injected by the injector is adjusted by axially shifting the valve assembly and the actuator assembly relative to one another.

The invention provides a valve having an elongated main body and a substantially flat area defined within the valve between its first and second ends; wherein a stopping screw is received in said flat area so as to prevent extraction of the valve from a casing by applying a force against a portion of the valve once the valve is moved a predetermined number of turns. The invention also provides a method for inhibiting the turning of a valve having the steps of installing a threaded portion of a valve in a first threaded aperture through a casing, where the first threaded aperture receives the threads of the threaded portion of the valve; and threading a screw through a second threaded aperture in an exterior of the casing, where the screw, is disposed in a position to come into direct contact with the valve after a predetermined number of turns.

An inner side wall surface of a gap forming member, which is opposed to a flange outer wall surface of a flange of a needle, is slidable relative to the flange outer wall surface. Also, an outer side wall surface of the gap forming member, which is opposed to a stationary core inner wall surface of a stationary core, is slidable relative to the stationary core inner wall surface. The flange outer wall surface and the outer side wall surface are curved to project in a radially outer direction of a housing in a cross section thereof taken along an imaginary plane, which includes an axis of the housing.

A fuel injection system for fuel metering may include an injection nozzle, which includes a nozzle body, a nozzle needle, and a nozzle orifice, wherein nozzle needle is disposed in the nozzle body; a control piston configured to mechanically and electrically contact the nozzle needle in an axial direction opposite to the nozzle orifice; a transmitter configured to communicate with a controller and electrically contact the nozzle needle via the control piston; wherein the controller is configured to determine an open state and a closed state between the nozzle needle and the nozzle body via an electrical signal detected by the transmitter; and wherein the controller is configured to adjust the open state and the closed state in correlation with a fuel injection quantity.

An assembly at least comprising a fuel injector for dual fuel operation of an internal combustion engine. The assembly includes a nozzle holder defining a fuel circuit and provided with a nose adapted in use to be in connection with a combustion space of an internal combustion engine, and first and second nozzles in communication with the fuel circuit in the nozzle holder for directly injecting liquid fuel into the combustion space of the internal combustion engine for ignition of a combustible mixture present in the combustion space. The first and second nozzles adjacent to the nose of the nozzle holder are interconnected by a cooling channel. At each actuation of a fuel pump upstream of the first and second nozzles, substantially a full volume of fuel pumped during actuation of the fuel pump is allowed to flow through the cooling channel and via the first and second nozzles.