Abstract: In a method and a device for operating an electrical supercharger, the electrical supercharger is actuated for cooling and/or diagnostic purposes in the non-combustion operation of the internal combustion engine.

Abstract: The invention is directed to a method and an arrangement for controlling an internal combustion engine (20) which achieve an optimal efficiency in different operating states. An opening time of an inlet valve (5) of a cylinder (1) of the engine (20) is variably adjusted. Depending upon an operating variable, especially the engine speed, two operating states of the engine (20) are distinguished. In a first operating state, during an intake operation, an opening of the inlet valve (5) is delayed. In a second operating state, a closing of the inlet valve is delayed and carried out during a compression operation.

Abstract: A method and a device for controlling knock in response to the failure of a phase detector are described, which implement the normal, cylinder-selective knock control under the condition, that the dual ignition is not activated. If the dual ignition is activated when the phase detector fails, then the knock control is carried out, using a non-cylinder-selective measure. Such a non-cylinder-selective measure could include safety-ignition retard or knock control, using one knock-detection threshold value for all of the cylinders.

Abstract: An internal combustion engine, especially for a motor vehicle, is described which is provided with a combustion chamber wherein fuel can be injected directly by an injection valve in a first operating mode during an induction phase, in a second operating mode during a compression phase or in a third operating mode during the induction phase and during the compression phase and can be ignited by a spark plug. In the third operating mode, the mass of the fuel, which is injected during the induction phase, is reduced (32) by the control apparatus.

Abstract: The invention is directed to a method for protecting a catalytic converter in the exhaust gas of an internal combustion engine in a starting operation of the engine. An index is formed for the quantity of an air/fuel mixture which will first react exothermally in the catalytic converter downstream of the engine. The index is compared to a predetermined threshold value and fuel metering is cut off when the threshold value is exceeded.

Abstract: An air mass is supplied to the combustion chambers by an intake manifold (12) in an internal combustion engine (10). An underpressure store (18) of a servo system (20) can be subjected to an underpressure via this intake manifold (12). The air mass flow in the inlet region (30) of the intake manifold (12) is determined by a sensor (32) and is supplied to an electronic control unit (26) for the fill computation. The actuation of the servo system (20) is detected and the determined air mass flow is corrected with or directly after a detected actuation of the servo system (20).

Abstract: The present invention relates to a method for starting a combustion engine that is equipped with a starter and a speed sensor which supplies an output signal as a function of the speed. Furthermore, a device for measuring the vehicle system voltage is provided which records the characteristic curve (3) of the battery voltage during starting phase (1) and after the starting phase (1). The crankshaft position is ascertained from the characteristic curve (3) of the battery voltage during the starting phase (1) of the combustion engine in starter operation.

Abstract: The invention relates to a method for knock control of an internal combustion engine, a knock detection being carried out on the cylinders of the internal combustion engine and a moment of ignition being retarded by a specifiable value as a function of detected knocking combustion in at least one of the cylinders, the system including at least two evaluation electronics and at least one cylinder being assigned to each of these evaluation electronics, and the knock sensor signals assigned to the cylinders being evaluated by the evaluation electronics assigned in each case, and the knock detection and the specification of the moment of ignition being effected by a control electronics, and the evaluation electronics being monitored for functionality.

Abstract: The invention is directed to a method and an arrangement (10) for controlling an electrically operated charger (1), which essentially prevent a sudden drop in voltage with the run-up of the electric charger. A drive signal (AS) is formed, which drives the electric charger (1). The rate of change of speed for an increase of the rpm of the electric charger (1) is pregiven in dependence upon the instantaneous supply voltage (UV).

Abstract: The invention is directed to a method and an arrangement for controlling a charger (2000, 1000) which make possible a reduction of the load on the on-board electrical system especially during run-up of the charger (2000, 1000). A drive signal is formed which drives the charger (2000, 10000. In dependence upon a first operating state of the engine (1005) which directly precedes an increase of the driver command torque, the drive signal is so formed that the charger (2000, 1000) increases its rpm already during this first operating state.

Abstract: The invention is directed to a method and an arrangement for controlling the charging pressure of an exhaust-gas turbocharger (1) wherein a charging pressure actual value (pvdkds) is tracked to a charging pressure desired value (plsoll). The charging pressure of the exhaust-gas turbocharger (1) is controlled in dependence upon a characteristic variable of an electric auxiliary charger (5). The electric auxiliary charger (5) coacts with the exhaust-gas turbocharger (1) for compressing the inducted air. In this way, an unnecessary opening of a bypass valve of the exhaust-gas turbocharger (1) is avoided.

Abstract: The invention relates to an electrically operated charge-air compressor, for connection to an internal combustion engine, which includes an electric motor with a stator and a rotor for driving a compressor impeller; the compressor impeller is disposed in a compressor housing that is provided with at least one air inlet and one air outlet, and the air inlet and the air outlet communicate via a flow conduit extending in the compressor housing, and by rotation of the compressor impeller in a compression portion of the flow conduit, a compression of the charge air is attainable. It is proposed that the charge-air compressor be refined such that the compressor impeller can be displaced in the compressor housing out of a working position into a position of repose and back again, and the compressor impeller upon a displacement into the position of repose is moved at least partway away from the compression portion.

Abstract: A method for knock detection in an internal combustion engine is disclosed, in which the output signal of at least one knock sensor, which is associated with the engine, is evaluated with the aid of an evaluation device. Knocking is detected when the prepared signal of the knock sensor exceeds a predeterminable reference level. The calculation of the input signal of the reference level tracking takes place as a function of whether the internal combustion engine is in a dynamic operating state or not, wherein in order to calculate the reference level in the event of dynamics, measurement values are also used which were determined when knocking was detected.

Abstract: The invention is based on a heating system for a motor vehicle, which is driven by an internal combustion engine (10), in which a heater (30) includes a combustion chamber (32) with a fuel injection device (34) and an ignition device (35) and also includes an air blower (40), and is triggered as a function of operating parameters and/or ambient parameters of the motor vehicle and/or of the internal combustion engine (10) or by actuating signals. It is proposed that the combustion chamber (32) is connected to the exhaust system (62) of the internal combustion engine (10) in the region of an exhaust manifold (62) of the internal combustion engine (10), between outlet valves (24) and a exhaust gas catalytic converter (56), via an exhaust line (42).

Abstract: A method and an arrangement serve to operate an internal combustion engine equipped with an exhaust-gas turbocharger. An after-injection takes place with the overlapment of the opening angle of the inlet and outlet valves of a cylinder. The after-injection leads to an air/fuel mixture in the exhaust-gas system which is combustible. This mixture is combusted by driving an additional ignition device in the exhaust-gas system.

Abstract: An internal combustion has an exhaust gas line, an exhaust gas heat exchanger through which exhaust gas withdrawn through the exhaust gas line passes so as to take heat energy, a heating heat exchanger to which the withdrawn heat energy is made available and which is connected to a cooling fluid circuit of the internal combustion engine, an exhaust gas turbocharger provided with a turbine housing and a turbine wheel rotatable in the latter, the exhaust gas turbocharger being arranged in the exhaust gas line, the exhaust gas heat exchanger being connected heat conductively with the turbine housing of the exhaust gas turbocharger for withdrawing of heat from the exhaust gas which passes through the turbine wheel.

Abstract: A device for suppressing engine knocks in an internal combustion engine, using a detection device for the detection of the respective operating parameters of the internal combustion engine; a control unit for determining manipulated variables for the injection and ignition on the basis of the acquired operating parameters; a dynamic phase detection device for acquiring a dynamic phase of the internal combustion engine; and a correction device for correcting the manipulated variables for the ignition, which is constructed so that for knock suppression, the ignition control quantity, given a dynamic phase acquired by the dynamic phase detection device, can be adjusted in the late direction by a dynamic lead that is dependent on a predicted load difference, and at the end of the dynamic phase can be brought step-by-step back to the manipulated variable determined by the control unit.

Abstract: In a method and a device for operating an electrical supercharger, the electrical supercharger is actuated for cooling and/or diagnostic purposes in the non-combustion operation of the internal combustion engine.

Abstract: The invention is based on a heating system for a motor vehicle, which is driven by an internal combustion engine (10), in which a heater (30) includes a combustion chamber (32) with a fuel injection device (34) and an ignition device (35) and also includes an air blower (40), and is triggered as a function of operating parameters and/or ambient parameters of the motor vehicle and/or of the internal combustion engine (10) or by actuating signals.

Abstract: A method checks the effectiveness of at least one measure (M) for heating a catalytic converter in the exhaust-gas system of an internal combustion engine. A measure (M) is activated and a signal (SA) in the exhaust-gas system of the engine is detected. The signal (SA) is evaluated to determine an index (Tact) for an increase in temperature of the catalytic converter after activating the measure (M). An expectation value (Tmodel) is determined for the increase of the temperature from operating characteristic variables of the engine and a temperature model. The index (Tact) is compared to the expectation value (Tmodel). The measure (M) is evaluated as ineffective when the index (Tact) is clearly less than the expectation value (Tmodel) with the expectation value (Tmodel) having been formed under the expectation of an effective heating measure.