An injector for injecting fuel including an injector housing, a movable nozzle needle with a nozzle needle tip arranged in the injector housing, and a nozzle needle seat for receiving the nozzle needle tip. A contact pairing of the nozzle needle and the nozzle needle seat here represents a mechanical switch that adopts a closed state upon contact of the nozzle needle tip with the nozzle needle seat and an open state upon interruption of the contact. Provision is additionally made that the injector has an input line and an output line for controlling movement of the nozzle needle, the switch has a first connector connected to the input line and a second connector connected to the injector housing, and a resistor connected between the first connector of the switch and the input line.

An injector for injecting fuel including an injector housing, a movable nozzle needle with a nozzle needle tip arranged in the injector housing, and a nozzle needle seat for receiving the nozzle needle tip. A contact pairing of the nozzle needle and the nozzle needle seat here represents a mechanical switch that adopts a closed state upon contact of the nozzle needle tip with the nozzle needle seat and an open state upon interruption of the contact. Provision is additionally made that the injector has an input line and an output line for controlling movement of the nozzle needle, the switch has a first connector connected to the input line and a second connector connected to the injector housing, and a resistor connected between the first connector of the switch and the input line.

A fuel injector for an internal combustion engine of a motor vehicle. The fuel injector including the following: (a) a pole piece, (b) an armature which can be moved along a movement axis, (c) a coil and (d) a permanent magnet, wherein the movable armature has at least one electrically insulating element which is designed to reduce eddy currents in the armature, and wherein the permanent magnet is fitted such that it generates a magnetic field which produces a force which acts on the armature in the direction of the pole piece. The invention also describes a method for ascertaining a position of a movable armature in a fuel injector and also an engine controller.

The magnetic valve recoil device is intended for a valve-type ignition pre-chamber having a stratification cavity connected by a stratification pipe, which a stratification valve can close, to a combustion chamber housing a primary charge, a stratification injector, and an ignition unit leading to the cavity in order to inject and ignite an initiator charge so as to ignite the primary charge via a torch ignition pre-chamber formed by the stratification valve with the stratification pipe when it is not closing the latter, the valve being otherwise kept in contact with the pipe by a magnetic field created by a magnetic field source.

The magnetic valve recoil device is intended for a valve-type ignition pre-chamber having a stratification cavity connected by a stratification pipe, which a stratification valve can close, to a combustion chamber housing a primary charge, a stratification injector, and an ignition unit leading to the cavity in order to inject and ignite an initiator charge so as to ignite the primary charge via a torch ignition pre-chamber formed by the stratification valve with the stratification pipe when it is not closing the latter, the valve being otherwise kept in contact with the pipe by a magnetic field created by a magnetic field source.

A valve assembly for an injection valve includes a valve body having a central longitudinal axis and a cavity with a fluid inlet portion and a fluid outlet portion, a valve needle axially movable in the cavity to prevent a fluid flow through the fluid outlet portion in a closing position and to allow fluid flow through the fluid outlet portion in further positions, and a guiding device arranged in the cavity and configured to guide the valve needle relative to the valve body. The guiding device has a first guide element fixedly coupled to the valve body and a second guide element fixedly coupled to the valve needle. The first guide element includes a magnetic material with a first magnetic field and the second guide element includes a magnetic material with a second magnetic field, the first and second magnetic fields being orientated in opposite directions.

A fuel injection valve includes a housing with a cavity, a valve needle, an actuator including a magnetic coil arranged in a coil casing, and an armature in the cavity. The housing includes a separation ring positioned between the armature and the coil casing and configured to lead the electromagnetic flux to the armature. The separation ring includes a first part and a second part. The first part is made of a first material and the second part is made of second material that differs from the first material. The first material and the second material are magnetic materials.

This description presents liquid filter comprising filter housing containing all parts of the filter; filtering element trapping impurities present in liquid being filtered; solid support element preventing filtering element from getting deformed, filter housing cover, and other components.

The most important element presented in this description is filter support stem enabling the use of filter with extreme pressure levels of the filtered liquid (up to 300 MPa) and sudden changes to these levels. The support stem prevents filtering element from getting deformed to the extent that would render it unfunctional.

One of the possible applications of the filter presented herein is filtering high-pressure diesel fuel between high-pressure pump and injectors.

An important feature of this liquid filter is that it is not integrated into other standard parts of fuel system, but added to fuel system as separate component that can be easily replaced without replacing other parts of the system.

To improve durability and ensure reusability of filtering element of liquid filter this element is made of metal or other material possessing similar properties.

A fuel injector for an internal combustion engine of a motor vehicle. The fuel injector including the following: (a) a pole piece, (b) an armature which can be moved along a movement axis, (c) a coil and (d) a permanent magnet, wherein the movable armature has at least one electrically insulating element which is designed to reduce eddy currents in the armature, and wherein the permanent magnet is fitted such that it generates a magnetic field which produces a force which acts on the armature in the direction of the pole piece. The invention also describes a method for ascertaining a position of a movable armature in a fuel injector and also an engine controller.

A solenoid-based fuel injector is described. The fuel injector comprises a tubular body (48) comprising a magnetic material and an armature (16) disposed inside the tubular body. The tubular body has an integrally-formed, inwardly-projecting shelf (52) configured to provide a pole piece.