Abstract: A method of operating an internal combustion engine, wherein a fuel-air mixture is burnt in the internal combustion engine and the internal combustion engine drives a generator, wherein the generator is connected to a power supply network and delivers power to the power supply network and wherein upon or after detection of a dynamic network fault by which the power delivery of the generator into the power supply network is reduced acceleration of the internal combustion engine is prevented or limited, wherein upon or after the detection of the network fault in the power supply network the fuel feed to the internal combustion engine is increased.

Abstract: A piston for an internal combustion engine with a piston crown and a circumferentially arranged crown edge, whereby, near the periphery of the crown edge, a thermal barrier coating is applied, whereby the thermal barrier coating tapers off before the periphery of the crown edge.

Abstract: An internal combustion engine is provided. The internal combustion engine includes a control device, and at least one injector for liquid fuel. The injector(s) can be controlled by the control device via an actuator control signal. The injector(s) include an injector outlet opening for the liquid fuel which can be closed by a needle. A sensor is also provided for measuring a measurement variable of the injector(s). The sensor is or can be in a signal connection with the control device. An algorithm is stored in the control device, which algorithm calculates a state of the injector(s) based on input variables and an injector model, compares the state calculated via the injector model with a target state, and produces a state signal in accordance therewith. The state signal is characteristic of a change in the state of the injector(s) that occurs during intended use of the injector(s) and/or an unforeseen change in the state of the injector(s).

Abstract: A method for detecting the quantity of gas (m) which is supplied by means of a gas supply device to an antechamber of an internal combustion engine, whereby a targeted disturbance (?u) of the gas quantity (m) supplied by the gas supply device is performed and a change (?T) resulting from the target disturbance (?u) in an exhaust gas temperature (T) of an exhaust gas generated in a combustion chamber connected to the antechamber is measured, whereby, by comparison with a target value of the change (?Ttarget) of the exhaust gas temperature (T), the gas quantity (m) supplied by means of the gas supply device is deduced.

Abstract: A cylinder head comprising at least one pre-chamber, at least one spark plug projecting into the pre-chamber, and at least one pre-chamber gas valve opening into the pre-chamber, wherein the spark plug and the pre-chamber gas valve are arranged in a common cavity of the cylinder head, wherein the spark plug and the pre-chamber gas valve are arranged in bores which mutually pass through each other.

Abstract: An internal combustion engine is provided, which includes at least one combustion chamber, and a turbocharger with an exhaust gas turbine and an exhaust gas after-treatment device. The exhaust gas after-treatment device has a first catalytic converter arranged aerodynamically between the at least one combustion chamber and the exhaust gas turbine. A second catalytic converter is arranged aerodynamically between the first catalytic converter and the exhaust gas turbine, and at least one partial oxidation chamber is arranged aerodynamically between the first catalytic converter and the second catalytic converter. Also provided is a method for reducing exhaust gas emissions of an internal combustion engine.

Abstract: A pre-chamber gas valve including a valve body, at least one valve spring and at least one valve needle, wherein the valve body has a lower space which is acted upon with gas in the operating condition and an upper space in which the valve spring is arranged, wherein the upper space is closed by way of a pressed plug.

Abstract: A method of operating an internal combustion engine, in particular a gas engine, comprising at least one combustion chamber to which a charge air is fed with a variable charge pressure and/or a variable amount of charge air, wherein a cylinder pressure value is ascertained from at least one measurement value of a sensor arranged in the at least one combustion chamber, wherein the cylinder pressure value is regulated by altering the charge pressure and/or by altering the amount of charge air as a setting value or values to a cylinder pressure target value, wherein the cylinder pressure target value is selected in dependence on a power of the internal combustion engine.

Abstract: An internal combustion engine with a regulating device, whereby a fuel-air mixture is burned in the internal combustion engine with a combustion air ratio controllable by the regulating device, whereby the regulating device comprises an emission control loop, which is designed to control the charge-air pressure as a substitute variable for the NOx emission by the actuators influencing the charge-air pressure via a functional relationship, such that, for each target power or actual power of the internal combustion engine, a charge-air pressure target value can be set, and whereby the internal combustion engine further comprises a variable valve train, by means of which an operating characteristic of at least one inlet valve can be varied, whereby the functional relationship takes into account the influence of an adjustment of the operating characteristic of the at least one inlet valve.

Abstract: A cylinder head comprising a cavity for receiving a pre-chamber gas valve, wherein an opening extending substantially or completely around the pre-chamber gas valve forms an annular passage with a wall of the cavity, that surrounds the pre-chamber gas valve, wherein the annular passage is connected to at least one gas feed passage for supplying the pre-chamber gas valve with combustion gas, wherein the annular passage with at least one inclined gas passage is connected with the lower cavity of the pre-chamber gas valve.

Abstract: An internal combustion engine (1) having a regulating device (C) wherein an air-fuel mixture with a combustion air ratio (?) which is adjustable by the regulating device is burnt in the internal combustion engine, wherein the regulating device (C) has a power output regulating circuit adapted to adapt an actual output (Pg) of the internal combustion engine (1) to a reference power output (Pdg) of the internal combustion engine (1) by way of an adjustment of the combustion air ratio (?), and a NOx emission regulating circuit adapted by way of a functional relationship (2) to actuate actuators influencing a charge pressure as an alternative parameter for the NOx emission by the charge pressure such that a charge pressure reference value (pdim) can be set for each reference power output (Pdg) of the internal combustion engine.

Abstract: A filter insert is useful for the separation of liquid droplets from a gas flow, particularly a gas flow from an internal combustion engine. The filter insert includes a media packet with layered portions of filter media. The media packet includes at least one layer of filter media with capillary effect to close the media packet to gas passage.

Abstract: A method for operating an internal combustion engine, in particular a gas engine having at least two cylinders, includes acquiring a cylinder-specific first cylinder signal (pmax, E) from each cylinder. At least one combustion parameter (Q, Z) of the corresponding cylinder is controlled as a function of the first cylinder signal (pmax, E), and a cylinder-specific reference cylinder value (pmax?, E?) is set for the first cylinder signal (pmax, E) for each cylinder. The at least one combustion parameter (Q, Z) of the cylinder is adjusted as a function of the deviation of the first cylinder signal (pmax, E) from the reference cylinder value (pmax?, E?), and the first cylinder signal (pmax, E) tracks the reference cylinder value (pmax?, E?).

Abstract: A method of operating an internal combustion engine with at least one piston-cylinder unit, and preferably a plurality of the piston-cylinder units, whereby, in a detection mode of the internal combustion engine one or more knock-promoting measures are taken until knocking has occurred in at least one piston-cylinder unit, and the measure(s) is/are intensified until a termination criterion is reached, whereby it is detected in which of the piston-cylinder units knocking has occurred, and whereby, in piston-cylinder units detected as knocking, the ignition time for a normal operating mode of the internal combustion engine is retarded.

Abstract: In a method of controlling a dual fuel engine in which power in the form of a first gaseous fuel and in the form of a self-igniting second fuel is fed to at least one combustion chamber, a knock signal representative of the combustion chamber is detected. When a knock signal indicating a knock of at least a first intensity is detected, the amount of first fuel fed to the combustion chamber of the engine is increased, the increased introduction of power into the combustion chamber caused by the increase in the amount of first fuel being compensated by a corresponding reduction in the power contribution of the second fuel. When a knock signal indicating a knock of at least a second intensity greater than the first intensity is detected, the amount of first fuel is reduced.

Abstract: A filter for an internal combustion engine is used to separate liquid suspended particles from a gas discharged from a crankcase of the internal combustion engine to avoid a rise in engine crankcase pressure. The filter includes at least one filter portion for coarse separation, at least one filter portion for fine separation, and at least one drainage layer arranged within the at least one filter portion for fine separation.

Abstract: A fuel injector has a storage volume, wherein the storage volume is variable in operation by a control signal.

Abstract: A method involves operating an internal combustion engine connected to an electric generator, in particular a synchronous generator, during a network fault, in particular during an electric short-circuit, in a power supply network connected to the generator. A mechanical power delivered by the internal combustion engine is introduced into the generator and converted into electric power in the generator. The electric power is delivered to the power supply network, and the mechanical power delivered by the internal combustion engine is at least temporarily increased depending on the value of at least one operating parameter of the generator and/or the internal combustion engine prior to the network fault and/or during the network fault, preferably by an amount of a fuel introduced into the internal combustion engine being increased.

Abstract: An internal combustion engine, in particular a stationary gas engine, includes a combustion chamber to which a propellant can be fed from a first propellant source via a combustion chamber pipe, and a pre-combustion chamber to which a flushing gas can be fed via a flushing gas pipe. A flushing gas mixer, in which a propellant to be fed via a propellant pipe from the first propellant source or from a second propellant source, and a synthesis gas to be fed via a synthesis gas pipe, can be mixed is provided. A mixer outlet opens into the flushing gas pipe, and the synthesis gas can be generated by a reformer to which a fuel can be fed from a fuel source via a reformer feed pipe. The reformer outlet of the reformer opens into the synthesis gas pipe, and a cooling device for cooling the synthesis gas is provided.

Abstract: In a method of starting an internal combustion engine having a plurality of piston-cylinder units wherein there are dead volumes upstream of the piston-cylinder units, wherein upon an attempt at starting the internal combustion engine, the pistons are driven in the cylinders by an auxiliary motor. The maximum permissible duration of a starting attempt is restricted by a predetermined starting time (ts) of the internal combustion engine. The starting time (ts) is calculated and predetermined prior to or at the beginning of a starting attempt of the internal combustion engine depending on a state of the internal combustion engine and/or the auxiliary motor.