Abstract: A method for activating an injector for injecting fuel into an internal combustion engine, in which a nozzle needle of the injector moves from a closed position in the direction of an open position as long as an activation signal is applied to the injector. The nozzle needle of the injector moves from the open position into the closed position when the activation signal is absent. The duration of the activation signal is selected in such a way that the nozzle needle does not reach its completely open position. In specific operating states, a second activation signal is applied to the injector before reaching the closed position of the injector, which has the result that the nozzle needle of the injector moves back in the direction of the open position.

Abstract: A method for activating an injector for injecting fuel into an internal combustion engine, in which a nozzle needle of the injector moves from a closed position in the direction of an open position as long as an activation signal is applied to the injector. The nozzle needle of the injector moves from the open position into the closed position when the activation signal is absent. The duration of the activation signal is selected in such a way that the nozzle needle does not reach its completely open position. In specific operating states, a second activation signal is applied to the injector before reaching the closed position of the injector, which has the result that the nozzle needle of the injector moves back in the direction of the open position.

Abstract: A method is described for supplying a rail pressure sufficient for a restart of a common rail internal combustion engine. The internal combustion engine is operated in a start/stop operation in which the internal combustion engine is stopped in response to a stop request and is started up again in response to a subsequent start request. The rail pressure is reduced by a presettable amount after a start request.

Abstract: The invention relates to a pressure regulating valve for opening and closing a drain of a high-pressure accumulator (12) for an injection device for an internal combustion machine. The pressure regulating valve comprises a valve element (18) having a closing element (29) and a magnetic actuator (17) having an armature (32), wherein the armature (32) acts on the closing element (29), which closes or opens a hydraulic connection from the high-pressure accumulator (12) to a valve chamber (26). The armature (32) comprises an armature plate (33) and an armature pin (34), wherein the armature pin (34) is axially guided in a valve housing (20). The armature pin (34) is implemented in two parts and has a transfer rod (51) and a pressure piece (52). The pressure piece (52) is disposed on the transfer rod (51) in a radially displaceable manner at an axial offset V.

Abstract: Proposed is a pressure regulating valve (10) for opening and closing an outlet of a high-pressure accumulator (12) for an injection device for internal combustion engines. The pressure regulating valve (10) has a valve element (18) which can be actuated by a magnet actuator (17). The magnet actuator (17) acts, by means of an armature (31), on a closing element (29) which closes off or opens up a hydraulic connection from the high-pressure accumulator (12) to a valve chamber (26), wherein the valve chamber (26) is hydraulically connected to a low-pressure port (15). The armature (31) has an armature plate (32) and an armature pin (33), wherein the armature plate (32) is arranged in a movable manner in an armature chamber (44). The armature chamber (44) is hydraulically connected via a return connection (50) to the valve chamber (26).