Abstract: An ignition laser for an internal combustion engine is provided, wherein the combustion chamber window is connected to a housing of the ignition laser in a gas-, pressure-, and temperature-resistant manner.

Abstract: A method is described for operating an ignition device, in particular in an internal combustion engine, having a combustion chamber window for optically connecting the ignition device to a combustion chamber. An optical signal which may be detected in the region of the combustion chamber window is evaluated to deduce a state of the combustion chamber window. In particular, soiling of the combustion chamber window may be identified in this manner.

Abstract: In a method and an apparatus for detecting a continuous ingress of fuel into the lubricating oil of an internal combustion engine, that is to say oil dilution, in particular of a motor vehicle during cold starting, there is provision, in particular, for the continuous ingress of fuel to be detected by means of a lambda control. The continuous ingress of fuel is preferably determined using the outgassing of fuel from a crankcase of the internal combustion engine, wherein the depletion is based on adaptation values of the lambda control.

Abstract: An internal combustion engine is operated with direct fuel injection into the combustion chambers. Furthermore, the internal combustion engine is operated with sub-optimum ignition angle efficiency and an apportionment of a fuel quantity, which is to be injected before the start of a combustion, into at least two partial injections. A torque loss which results from the sub-optimum ignition angle efficiency and/or from the apportionment of the fuel to be injected is compensated by means of an increased charge of the combustion chambers. The fuel quantity and the charge are coordinated with one another in such a way that the air ratio lambda of the combustion chamber charges is greater than 1.

Abstract: In an internal combustion engine, fuel is directly injected into at least one combustion chamber at least during a compression stroke in such a way that a stratified mixture is present in the combustion chamber. This mixture is then externally ignited. The fuel is introduced during the compression stroke by at least one main injection and an ignition injection, the ignition injection taking place immediately before an ignition and producing at least essentially no torque.

Abstract: Suggested is a procedure for heating up a catalyst in the exhaust gas system of a charged combustion engine by adding air to the exhaust gas system, whereby the added air is taken from a suction system of the combustion engine in the direction of the air current behind a compressor of an exhaust gas turbo charger that is arranged in the suction system. The procedure distinguishes itself thereby that the combustion engine is driven with a direct injection of fuel in its combustion chambers, whereby it is driven after a start-up with an apportionment of a fuel amount, which has to be injected before the beginning of a combustion, into at least two partial injections per ignition, and with a suboptimal ignition angle efficiency. A second independent claim concerns a control unit, which is customized for controlling the course of the procedure.

Abstract: Suggested is a procedure for heating a catalyst in the exhaust gas system of a supercharged combustion engine with direct fuel injection and variable gas exchange valve control by producing a reactive exhaust gas fuel/air mixture in the exhaust gas system, whereby an air percentage of the reactive fuel/air mixture is thereby produced that air is rinsed from a suction system of the combustion engine over its combustion chambers into the exhaust gas system. The invention distinguishes itself thereby that the combustion engine is operated in idle mode after a cold start with a greater valve overlap and/or a greater valve overlap profile than in a normal operation where the catalyst is already heated as well as with an apportionment of a fuel amount that has to be injected before a combustion into at least two partial injections per ignition and combustion chamber and with a suboptimal ignition angle efficiency.

Abstract: A fuel injector for fuel-injection systems of internal combustion engines includes a solenoid coil, a valve needle that is in operative connection with the solenoid coil and acted upon by a restoring spring in a closing direction in order to actuate a valve-closure member which forms a sealing seat together with a valve-seat surface formed at a valve-seat member, and at least two spray-discharge orifices, which are formed in the valve-seat member. In a discharge region, the spray-discharge orifices are in connection with capillaries formed in the end face of the valve-seat member.

Abstract: A method for operating an internal combustion engine having a first fuel injection system for injecting fuel into a combustion chamber of a cylinder of the internal combustion engine, and having a second fuel injection system for intake manifold injection, an injected fuel mass being corrected for the adaptation of an air/fuel mixture ratio; and at least one first adaptation value for the first fuel injection system being used and at least one second adaptation value for the second fuel injection system being used. The first and the second adaptation value are evaluated in order to conclude whether there is an error in an air system of the internal combustion engine.

Abstract: A method for operating an internal combustion engine having a first fuel injection system for injecting fuel into a combustion chamber of a cylinder of the internal combustion engine, and having a second fuel injection system for intake manifold injection, an injected fuel mass being corrected for the adaptation of an air/fuel mixture ratio; and at least one first adaptation value for the first fuel injection system being used and at least one second adaptation value for the second fuel injection system being used. The first and the second adaptation value are evaluated in order to conclude whether there is an error in an air system of the internal combustion engine.

Abstract: A fuel injector (1) for direct injection of fuel into the combustion chamber of internal combustion engines having an actuator (10), a valve needle (3) operable by the actuator (10) for actuation of a valve closure member (4) which, together with a valve seat face (6) on a valve seat member (5), forms a sealing seat, and at least one spray discharge orifice (7), which is formed downstream from the valve seat (6). A flame protection cone (34) is provided on a downstream end (35) of the fuel injector (1).

Abstract: A fuel injector for fuel-injection systems of internal combustion engines includes a solenoid coil, a valve needle that is in operative connection with the solenoid coil and acted upon by a restoring spring in a closing direction in order to actuate a valve-closure member which forms a sealing seat together with a valve-seat surface formed at a valve-seat member, and at least two spray-discharge orifices, which are formed in the valve-seat member. In a discharge region, the spray-discharge orifices are in connection with capillaries formed in the end face of the valve-seat member.

Abstract: A fuel-injection system for internal combustion engines has at least one fuel injector injecting fuel into a combustion chamber, which is delimited by a cylinder wall in which a piston is guided. A spark plug projects into the combustion chamber, and the fuel injector is located in the combustion chamber in the region of a gas-intake valve toward the cylinder wall. The fuel injector produces a plurality of fuel jets at least one of these fuel jets being tangentially oriented to the region of the spark plug.

Abstract: A fuel-injection system for an internal combustion engine comprises a fuel injector for injecting fuel into a combustion chamber, which is inserted in a receiving bore of a cylinder head of the internal combustion engine and sealed from the combustion chamber by a seal, a flame-proofing screen being arranged on the discharge-side of the fuel injector in the receiving bore, which shields spray-discharge orifices of the fuel injector from the combustion chamber of the internal combustion engine. The flame-proofing screen is arranged at a discharge-side end of the fuel injector or on a wall of the receiving bore of the cylinder head on the discharge-side of the fuel injector.

Abstract: A fuel injector (1) for direct injection of fuel into the combustion chamber of internal combustion engines having an actuator (10), a valve needle (3) operable by the actuator (10) for actuation of a valve closure member (4) which, together with a valve seat face (6) on a valve seat member (5), forms a sealing seat, and at least one spray discharge orifice (7), which is formed downstream from the valve seat (6). A flame protection cone (34) is provided on a downstream end (35) of the fuel injector (1).