The present disclosure relates to fuel injection systems. The teachings thereof may be embodied in an adjustment device for a fuel injection valve including a ring element to fit a recess of the cylinder head between a valve housing and the cylinder head to align the valve relative to the recess. The ring element may include a metallic coil spring and an elastomeric component surrounding and completely enveloping the metallic component.

A decoupling element for a fuel-injection device has a low-noise and pivotable construction. The fuel-injection device includes at least a fuel injector and a receiving bore in a cylinder head for the fuel injector as well as the decoupling element between a valve housing of the fuel injector and a wall of the receiving bore. The decoupling element is in the form of a ring, in particular a closed ring, which has a lower end face that sits on a shoulder of the receiving bore, and which has an upper end face that rises conically from radially outside toward radially inside and is in intimate contact with a spherically curved shoulder area of the valve housing of the fuel injector. The fuel-injection device is particularly suitable for the direct injection of fuel into a combustion chamber of a mixture-compressing combustion engine having externally supplied ignition.

A fuel supply device includes an injector, a fuel pressurization device and an ECU. The fuel pressurization device includes an electromagnetic valve. The fuel pressurization device is configured to pressurize a fuel in accordance with opening/closing of the electromagnetic valve and discharge the fuel toward the injector. The ECU is configured: to control the opening/closing of the electromagnetic valve to adjust the fuel amount discharged toward the injector; to execute an operation sound suppression control during a low-load operation of an engine by reducing an opening/closing frequency of the electromagnetic valve and increasing the fuel amount discharged for each opening/closing of the electromagnetic valve; not to execute the operation sound suppression control when a partial lift injection is in progress; and to execute the operation sound suppression control when the partial lift injection is not in progress.

An apparatus and method for operating a fuel injector of an internal combustion engine is disclosed. A first energizing electrical current is supplied to an injector solenoid, causing the opening of an injector control volume and a pressure reduction in said injector control volume, for a first energizing time. The first energizing time is predetermined to avoid that the pressure in the injector control volume approximates a value which would cause an injector needle to raise up and a fuel injection to start. After the predetermined time interval, a second energizing electrical current is supplied to the injector solenoid for a predetermined second energizing time, which is a function of a rail pressure (p.sub.rail) and a fuel injection quantity.

The present disclosure relates to the field of motor vehicles. The teachings thereof may be embodied in a self-locking internal damper comprising: a damper body with a closed chamber; each of two ends of the closed chamber in the length direction including a straight plate section projecting therefrom, with a center line of the straight plate section passing through a center point of the closed chamber; two connecting portions located at ends of the two straight plate sections, respectively; and at least one of the two connecting portions including a bent structure formed by extending and bending one of the straight plate sections.

A control valve is provided, in particular for metering in a fluid for a delivery pump which is arranged downstream. The control valve has a flow channel, an axially movable valve needle, and a valve element which can be loaded by the valve needle in an opening direction and is arranged in the flow channel. If the valve element is actuated in the opening direction by the valve needle, the fluid can flow back through the flow channel at least temporarily counter to the opening direction of the valve element. Upstream of the valve element as viewed in the backflow direction, the flow channel has a fluidically active shield which keeps the backflow at least partially free of a face of the valve element.

A valve for injecting fuel, including a valve positioning element, an armature connected to the valve positioning element, a stop that limits a movement of the armature, and a damping element provided between the armature and the stop, the damping element being applied as a damping layer on at least one part of the armature and/or on at least one part of the stop.

A connecting device for fuel injection systems is used for joining a fuel injector to a cup and to a fuel-conveying component. In this context, connecting elements are provided, which are insertable into the cup in such a manner, that they are situated at least approximately in one plane, which is oriented perpendicularly to a longitudinal axis of a cup. Connecting elements take the form of pin-shaped connecting elements. In addition, the connecting elements are formed in such a manner, that they are inserted into the cup, inside an outer cross-section of the cup. A securing element is also provided for securing the connecting elements. Furthermore, a fuel injection system having such a connecting device is provided.

The present disclosure relates to a device for a high-pressure pump for a motor vehicle comprising a valve housing and an actuator assembly arranged substantially along the central axis of the valve housing. The actuator assembly may include a recess extending from a first end. The actuator assembly may include at least one hydraulic compensation opening extending through a wall of the actuator assembly from the recess into an exterior region. It may also include a volume body in the actuator recess spaced apart from the actuator assembly and extending into a region of the at least one hydraulic compensation opening. The volume body may be immovable relative to the valve housing. The actuator assembly may move along the central axis relative to the valve housing and relative to the volume body.

An outlet and pressure relief valve assembly for a fuel pump includes a housing which extends along an axis from an inner end to an outer end. The housing has a bore which extends thereinto along the axis from the inner end. A valve seat is located within the bore and has an end wall which is transverse to the axis and also has a sidewall which is annular in shape and extends away from the end wall. An outlet flow passage extends through the end wall such that the outlet flow passage is centered about the axis. A pressure relief flow passage extends through the end wall such that the pressure relief flow passage is laterally spaced from the outlet flow passage. An outlet valve member is located within the valve seat sidewall and a pressure relief valve member is located between the valve seat and the inner end.