Abstract: A piston fuel pump for an internal combustion engine includes a pump cylinder and a pump piston slidably accommodated in the pump cylinder. The piston fuel pump has a supporting and sealing assembly for the pump piston. The supporting and sealing assembly includes a guiding region configured to axially guide the pump piston in the pump cylinder and a sealing region having a sealing lip.

Abstract: A fuel injector for direct injection of fuel into a combustion chamber includes: a housing having at least one combustion chamber-side injection aperture; a linearly movable valve needle for opening and closing the injection aperture; a solenoid; an armature which is linearly movable by the solenoid; and a first sleeve attached to the armature. A first stop surface facing away from the combustion chamber is formed on the first sleeve, and a second stop surface facing the combustion chamber is formed on the valve needle, the first and second stop surfaces striking one another when the valve needle and/or the armature is/are moved linearly.

Abstract: In a method for controlling a valve which injects fuel into a combustion chamber of an engine and which has a valve member which closes a valve opening, and an electric actuator which drives the valve member to carry out strokes for releasing the valve opening and to which electrical control signals are applied for triggering valve member strokes of a defined stroke size, in order to compensate for an age-related stroke reduction of the valve member and deteriorated metering of the injected fuel related thereto, a stroke loss model into which temperature and temperature changes at the valve as well as the number of strokes carried out by the valve member are continuously incorporated is used to predict a reduction of the stroke size as a stroke loss and to correct the control signals using the predicted stroke loss.

Abstract: A piston fuel pump for an internal combustion engine includes a pump cylinder and a pump piston slidably accommodated in the pump cylinder. The piston fuel pump has a supporting and sealing assembly for the pump piston. The supporting and sealing assembly includes a guiding region configured to axially guide the pump piston in the pump cylinder and a sealing region having a sealing lip.

Abstract: In a method for controlling a valve which injects fuel into a combustion chamber of an engine and which has a valve member which closes a valve opening, and an electric actuator which drives the valve member to carry out strokes for releasing the valve opening and to which electrical control signals are applied for triggering valve member strokes of a defined stroke size, in order to compensate for an age-related stroke reduction of the valve member and deteriorated metering of the injected fuel related thereto, a stroke loss model into which temperature and temperature changes at the valve as well as the number of strokes carried out by the valve member are continuously incorporated is used to predict a reduction of the stroke size as a stroke loss and to correct the control signals using the predicted stroke loss.

Abstract: A fuel injector, in particular for direct injection of fuel into a combustion chamber, including a housing having one combustion-chamber side injection aperture, a valve needle which is linearly movable in the housing and outwardly opening for opening and closing the injection aperture, a piezoelectric actuator for moving the valve needle, a first stop surface on the valve needle facing the combustion chamber, and a second stop surface on the housing diametrically opposed to the first stop surface. The first stop surface makes an impact on the second stop surface in the case of a maximally possible movement of the valve needle in the direction of opening with the aid of the piezoelectric actuator.

Abstract: A fuel injector for direct injection of fuel into a combustion chamber includes: a housing having at least one combustion chamber-side injection aperture; a linearly movable valve needle for opening and closing the injection aperture; a solenoid; an armature which is linearly movable by the solenoid; and a first sleeve attached to the armature. A first stop surface facing away from the combustion chamber is formed on the first sleeve, and a second stop surface facing the combustion chamber is formed on the valve needle, the first and second stop surfaces striking one another when the valve needle and/or the armature is/are moved linearly.