A gas injector for injecting a gaseous fuel. The gas injector includes a magnetic actuator having an armature, an inner pole, and a coil, a closing element which opens and closes off a gas path at a sealing seat, the armature being operatively connected to the closing element, a sealed lubricant chamber filled with a lubricant and in which the armature is arranged, wherein the lubricant ensures lubrication of the armature, and a brake device which is arranged in the lubricant chamber and is designed to brake the closing element when the gas injector is reset from the open state to the closed state. The brake device has a brake pin, a damping chamber filled with lubricant and fluidically connected to the lubricant chamber via a first fluid path, a resilient brake element, an armature pin which is operatively connected to the armature and includes a guide disk.

A fuel injection valve includes a valve body, a coil, an inner fixed iron core that is arranged on an inner peripheral side of the coil, and an outer fixed iron core that is arranged on an outer peripheral side of the coil. The fuel injection valve also includes a movable element that is configured to be attracted to the inner fixed iron core and the outer fixed iron core, wherein the movable element is configured to be separable from the valve body and is configured to move the valve body.

An inside projection is formed in one piece with a second tubular member and projects in a tubular form toward a third tubular member, and an outside projection is formed in one piece with the third tubular member and projects in a tubular form toward the second tubular member, while an inner wall of the outside projection is engaged with an outer wall of the inside projection. Another inside projection is formed in one piece with the second tubular member and projects in a tubular form toward a first tubular member, and another outside projection is formed in one piece with the first tubular member and projects in a tubular form toward the second tubular member, while an inner wall of the outside projection is engaged with an outer wall of the inside projection.

A bush is disposed on an inner wall of a fixed core. A second spring, which biases a movable core in a valve-closing direction, has one end abutting the bush. The bush is formed separately from the fixed core, and is formed to be movable relative to the fixed core when adjusting a biasing force of the second spring. When a needle is abutting a valve seat, a gap is formed between a movable core first abutting face of the movable core and a flange end face of a flange portion included in the needle. Accordingly, during valve-opening, a relatively large force in a valve-opening direction is applied to the needle. Further, by changing the position of the bush relative to the movable core, the biasing force of the second spring may be adjusted without changing a length of the gap in a central axis direction.

A fuel injector is provided. A movable iron core is provided relatively displaceable to a valve body. A fixed iron core is opposed to the movable iron core. A first spring member energizes the valve body in a valve closing direction. A second spring member energizes the movable iron core in a valve closing direction. Contact portions are in contact with each other in a case where the movable iron core displaces in a valve opening direction with respect to the valve body. A gap is formed between the contact portions in a valve closing state. In a state in which the movable iron core and the valve body move in different directions after the movable iron core collides with the fixed iron core while a valve is opened, a spring force is not applied between the movable iron core and the valve body.

There is provided a solenoid pipe including a pipe formed of a ferromagnetic material containing 15 mass % or more to 18 mass % or less of Cr, an electromagnetic coil, and a valve body. A part of the pipe includes a reform portion, and the reform portion has a composition in which a component of the ferromagnetic material is mixed with a component of a Ni-containing material. e/d which is a ratio of a maximum deformation amount e of an outer circumferential surface side of the reform portion of the pipe with respect to a thickness d of the pipe near the reform portion is 0.5 or less, and c/d which is a ratio of a maximum deformation amount c of an inner circumferential surface side of the reform portion of the pipe with respect to the thickness d of the pipe is 0.5 or less. Accordingly, it is possible to obtain a locally feeble magnetized pipe with high dimensional accuracy and the solenoid valve using the pipe.

The present disclosure relates to actuators. Various embodiments may include a laminated magnet armature for an electromagnetic actuating device, an injection valve for metering a fluid, and/or an electromagnetic actuating device having a laminated magnet armature. For example, a laminated magnet armature for an electromagnetic actuating device wherein the magnet armature is displaceable along an axis A in a movement direction may include: a multiplicity of interconnected laminations. The laminations are oriented perpendicular to the axis A and are stacked in a movement direction of the magnet armature to form a lamination stack with a bottom side and a top side. Each lamination includes at least one recess open toward an edge of the lamination. The laminations are arranged within the lamination stack so the recesses form at least one duct extending through the lamination stack from the bottom side to the top side.

A method actuates a fuel injector having a coil drive with a solenoid and a magnet armature. The magnet armature can be moved along a longitudinal axis by a magnetic field generated by the solenoid. In the method, an amplification voltage is applied to the solenoid at a predefined point in time to move the magnet armature from a closed position into an open position. The amplification voltage is made available by a voltage-regulated direct voltage transformer from a supply voltage. The direct voltage transformer has a storage capacitor for supporting the voltage made available at the output of the direct voltage transformer. The storage capacitor is charged to a pilot control voltage by the amplification voltage before the given point in time, with the result that the voltage present at the solenoid is higher than the amplification voltage at the predefined point in time.

There is provided a hollow composite magnetic member obtained by partially reforming a hollow member which is formed of a ferromagnetic material containing Cr of 15 mass % or more and 18 mass % or less, in which the reformed portion includes an alloy containing Cr of 8 mass % or more and 18 mass % and Ni of 6.5 mass % or more and 50 mass % or less. Accordingly, a hollow composite magnetic member having a small width of the nonmagnetic portion and a fuel injection valve having the same can be provided.

An inside projection is formed in one piece with a second tubular member and projects in a tubular form toward a third tubular member, and an outside projection is formed in one piece with the third tubular member and projects in a tubular form toward the second tubular member, while an inner wall of the outside projection is engaged with an outer wall of the inside projection. Another inside projection is formed in one piece with the second tubular member and projects in a tubular form toward a first tubular member, and another outside projection is formed in one piece with the first tubular member and projects in a tubular form toward the second tubular member, while an inner wall of the outside projection is engaged with an outer wall of the inside projection.