Abstract: A bearing bush is for a holder, which is for fastening a component, particularly of a fuel distributor, to an add-on structure. The bearing bush has an inner bush part, which is made of a metallic material, and an outer bush part, which is made of a metallic material, and an elastically deformable damping element. The outer bush part has a continuous recess, in which the inner bush part is situated. The damping element is situated between the inner bush part and the outer bush part. A holder having such a bearing bush is also specified. In addition, a fuel-injection system having a fuel distributor and at least one holder is specified, which is used for fastening the fuel distributor on an internal combustion engine.

Abstract: In a method for actuating a switch element of a valve device between a first end position and a second end position, in a normal mode within a cycle following an end of a first energization, a movement of the switch element in a first direction effected by the loading device is retarded in a first direction by a brief second energization (“braking pulse”) that is introduced within the cycle once a pause period has ended following a characteristic point in time. It is provided that the optimum pause period and/or the optimum variable characterizing the braking pulse be ascertained in an adaptation mode.

Abstract: A method for operating a fuel system for an internal combustion engine having a metering device, an electrical actuating device, and a valve element includes: activating the electrical actuating device in at least one first cycle in such a way that the valve element switches into a second position corresponding to an open metering device; activating the electrical actuating device in at least one second cycle in such a way that the electrical actuating device is activated from activation to activation, with activation energy which decreases gradually, until a limiting case is reached in which the valve element only just or just no longer switches into the second position; ascertaining a first activation energy, which corresponds to the limiting case; and subsequently activating the actuating device, taking the first activation energy into account.

Abstract: A bearing sleeve for a holder, which is used for fastening a fuel distributor on an add-on structure, includes a first sleeve part and a second sleeve part. The first sleeve part has a rigid sleeve body and a damping element which is integrally connected to the sleeve body of the first sleeve part. The second sleeve part has a rigid sleeve body and a damping element which is integrally connected to the sleeve body of the second sleeve part.

Abstract: A system, which is used in particular as a fuel injection system for the high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each fuel injector is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a holding element, which has a supporting surface. The cup has a contact surface on an underside, by way of which the cup is supported at the supporting surface of the holding element by a damping layer. The holding element is attached to the cup. In addition, the fuel injector has a collar, which is braced on the holding element. Because of the damping layer, vibrations are able to be dampened, and the noise transmissions is able to be reduced.

Abstract: In a method for controlling a quantity control valve, at least two parameters characterizing the quantity control valve are utilized. A control signal supplied to the quantity control valve is defined by the at least two parameters. At least one parameter is ascertained based on the result of a first adaptation and a second adaptation, or based on the result of a first adaptation and the other parameter.

Abstract: A fuel injection system has a fuel distributor and multiple fuel injection valves each disposed on a cup of the fuel distributor. At least one injection valve is mounted on the associated cup by way of at least one holding element. An abutment surface is provided on the outer side of the cup. A support surface is configured on the underside of the cup. The holding element is moreover configured as a holding clamp. An abutment surface is provided on an outer side of the fuel injection valve. The holding clamp engages on the one hand behind the abutment surface of the cup and on the other hand behind the abutment surface of the fuel injection valve. The holding clamp furthermore pushes the fuel injection valve toward the support surface.

Abstract: A fuel injection system for high-pressure injection in internal combustion engines includes: a fuel distributor; and at least one holder which is used for fastening the fuel distributor to an add-on structure. The holder includes a holder body which has a first layer, a second layer, and an elastically deformable damping layer. The first layer and the second layer are made from a metallic material. The elastically deformable damping layer is disposed between the first layer and the second layer. The holder body is connected to the fuel distributor by laser welding. The damping layer is made of a visco-elastic material.

Abstract: A system, which in particular is used as a fuel injection system for high-pressure injection in internal combustion engines, includes a fuel distributor and a plurality of fuel injectors. Each of the fuel injectors is situated on a cup of the fuel distributor. At least one of the fuel injectors is fastened to the associated cup by a retaining clip. The retaining clip has at least one clip section which is situated between an inner side of the cup and an outer side of the fuel injector. Furthermore, at least one damping composite element is provided, which is situated between the clip section of the retaining clip and the outer side of the fuel injector. The damping composite element has an elastically deformable damping layer. A decoupling is thus realized, which acts to damp vibrations and consequently to reduce noise.

Abstract: A quantity control valve comprises a valve needle configured to move in an axial direction, a damping chamber having a wall, and a valve element delimiting the damping chamber. The valve needle is configured to move the valve element in an opening direction. A gap is defined between the wall of the damping chamber and the valve element. The gap has at least one recess and connects the damping chamber to a flow duct.

Abstract: A fuel injection system of an internal combustion engine delivers fuel into a fuel rail via a high-pressure pump. The quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device.

Abstract: A method for regulating a fuel injection system of an internal combustion engine, wherein the fuel injection system includes a high-pressure pump which is associated with a quantity control valve having a solenoid valve electromagnetically operable by a coil for supplying fuel, the quantity control valve regulating the fuel quantity pumped by the high pressure pump and the coil of the solenoid valve being energized according to a setpoint current value in order to close the valve for supplying fuel to the high-pressure pump; when the solenoid valve closes, the setpoint current value is reduced from a first current setpoint value to a second current setpoint value so that an emission of audible noise generated when the solenoid valve closes during operation of the internal combustion engine is at least partially reduced.

Abstract: A system, which may be embodied particularly as a fuel injection system for high pressure injection in internal combustion engines, includes a fuel distributor and a mounting support, which is used for fastening the fuel distributor to an externally-mounted structure, particularly a cylinder head, of an internal combustion engine. In this case, a damping composite element is provided, which is connected to the mounting support and/or the fuel distributor. The damping composite element includes at least one metal layer, which is formed at least essentially of a metallic material, and at least one elastically deformable damping layer.

Abstract: In a fuel injection system of an internal combustion engine, fuel is delivered from a high-pressure pump into a fuel rail. The quantity of the delivered fuel is influenced by a quantity control valve which is activated by an electromagnetic actuating device. The level of control of the quantity control valve during the transition from the closed state to the open state of the quantity control valve is provided in the form of a sufficiently flat, descending progression which allows a robust control of the opening motion with regard to the varying specimen properties.

Abstract: In a method for controlling a quantity control valve, at least two parameters characterizing the quantity control valve are utilized. A control signal supplied to the quantity control valve is defined by the at least two parameters. At least one parameter is ascertained based on the result of a first adaptation and a second adaptation, or based on the result of a first adaptation and the other parameter.

Abstract: A method for regulating a fuel injection system of an internal combustion engine, wherein the fuel injection system includes a high-pressure pump which is associated with a quantity control valve having a solenoid valve electromagnetically operable by a coil for supplying fuel, the quantity control valve regulating the fuel quantity pumped by the high pressure pump and the coil of the solenoid valve being energized according to a setpoint current value in order to close the valve for supplying fuel to the high-pressure pump; when the solenoid valve closes, the setpoint current value is reduced from a first current setpoint value to a second current setpoint value so that an emission of audible noise generated when the solenoid valve closes during operation of the internal combustion engine is at least partially reduced.

Abstract: A fuel injection system of an internal combustion engine delivers fuel into a fuel rail via a high-pressure pump. The quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device.

Abstract: In a fuel injection system of an internal combustion engine fuel is delivered into a fuel rail by a high-pressure pump. The quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device. At least one parameter of a braking pulse of the electromagnetic actuating device depends on an efficiency of the electromagnetic actuating device and/or on a supply voltage of a voltage source and/or on a temperature, in particular of a component of the fuel injection system or of the internal combustion engine.

Abstract: The invention relates to a fuel pump for a fuel system of an internal combustion engine, having a housing and a housing cap joined to the housing. In order to create a fuel pump which in its operation generates little airborne sound, structure-borne sound (vibration amplitudes) and pulsations in a low-pressure region of the fuel pump, it is proposed that the housing cap has at least one damping element, which is embodied as a sandwich construction having at least a first cover layer, a second cover layer, and a damping connection layer disposed between them. The damping connection layer has a markedly higher elasticity and/or higher material damping than the two cover layers, which may be constructed of sheet metal or the housing cap itself.

Abstract: The invention relates to a fuel pump for a fuel system of an internal combustion engine, having a housing and a housing cap joined to the housing. In order to create a fuel pump which in its operation generates little airborne sound, structure-borne sound (vibration amplitudes) and pulsations in a low-pressure region of the fuel pump, it is proposed that the housing cap has at least one damping element, which is embodied as a sandwich construction having at least a first cover layer, a second cover layer, and a damping connection layer disposed between them. The damping connection layer has a markedly higher elasticity and/or higher material damping than the two cover layers, which may be constructed of sheet metal or the housing cap itself.