Abstract: A method and a device for operating a drive unit having internal combustion engine, in particular of a vehicle, making an expansion of the adjusting range of a regulator possible without significant additional complexity. In at least one operating state a setpoint value for at least one manipulated variable of the drive unit) is predefined by the regulator to correct an actual value of a performance quantity of drive unit to a setpoint value of the performance quantity. To set one or more manipulated variables a compressor in an air intake to the internal combustion engine is activated if the setpoint value of the one or more manipulated variables exceeds a predefined threshold.

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: An arrangement for monitoring an air-mass measuring device (1) includes an electrically driven compressor (10) in an air supply of an internal combustion engine (5). The arrangement makes possible a precise modeling of the air mass flow. An air mass flow in the air supply is modeled in dependence upon a compressor rpm and a compressor pressure ratio and is compared to an air mass flow measured by the air-mass measuring device (1). The invention is also directed to a method for monitoring the air-mass measuring device (1).

Abstract: A method for regulating the supercharging of an internal combustion engine is provided, which method does not require adaptation offset. A manipulated variable is formed from the deviation between a setpoint value of an operating parameter of the internal combustion engine and an actual value of this operating parameter, the manipulated variable having at least one component supplied by an integral action controller. For the integral component, a limit value is specified which is determined from multiple operating parameters of the internal combustion engine. The limit value is adapted by adaptively determining a first of the operating parameters used for determining the limit value as a function of a second operating parameter.

Abstract: A method for operating an internal combustion engine by introducing air, in which the air is conducted into the induction region of the internal combustion engine following shutoff of the internal combustion engine. If necessary, the intake valves and the exhaust valves of at least one cylinder are moved into a position in which at least one intake valve and one exhaust valve of a combustion chamber of the internal combustion engine are open simultaneously. The method may be used in for an internal combustion engine having an electric turbocharger for the introduction of air.

Abstract: A method for controlling the compression ratio ? in a supercharged combustion engine. The latter is provided with a control device in which a maximum final compression temperature T2,max is ascertained, and, within the framework of a precontrol, an optimum efficiency compression ratio ?opt is ascertained. The knock limit is determined from the compression ratio ?, to which it corresponds, and which is ascertained from the precontrol. As a function of the efficiency curve in the characteristics map ?=f, a further change occurs in compression ratio ? or a setting back of the change in compression ratio ?. The values learned for ? and the ignition angle as a function of the operating point are permanently stored in a characteristics map to which the engine control has access.

Abstract: An internal combustion engine has a turbocharger system that includes an exhaust gas turbocharger and an auxiliary compressor and is connected to an engine control system via which it is controlled as a function of engine operating parameters. This provides a relatively low-cost method for precisely controlling or regulating the secondary air by integrating the auxiliary compressor into a secondary air provision system that is operable by the control system within a load and/or rotational speed range below the boost range during a warm-up phase.

Abstract: The present invention creates a method and an apparatus for blanking out interfering noise in connection with detecting knocking in an internal combustion engine. The following functions are performed: Forming a sensor signal integral value (KI) during a measurement time slot (MF) of the sensor signal of a knocking sensor; forming a correction value (DKI) for the sensor signal integral value (KI) corresponding to an interfering noise during the measurement time slot (MF); and subtracting the correction value (DKI) from the sensor signal integral value (KI) for forming a corrected sensor signal integral value (KI′) with the interfering noise blanked out.

Abstract: A method and a device for operating a drive unit having internal combustion engine, in particular of a vehicle, making an expansion of the adjusting range of a regulator possible without significant additional complexity. In at least one operating state a setpoint value for at least one manipulated variable of the drive unit) is predefined by the regulator to correct an actual value of a performance quantity of drive unit to a setpoint value of the performance quantity. To set one or more manipulated variables a compressor in an air intake to the internal combustion engine is activated if the setpoint value of the one or more manipulated variables exceeds a predefined threshold.

Abstract: A method and a device are provided for diagnosing operation of an internal combustion engine having a compressor for compressing air supplied to the internal combustion engine, which method and device permit diagnosis of as many error patterns in the compressor operation as possible without the use of additional sensors. An actual pressure ratio across the compressor is measured for a compression diagnosis. The measured actual pressure ratio is compared with a predetermined reference value, and an error is detected as a function of the result of the comparison.

Abstract: A method and a device for controlling an electrically operated supercharger are proposed, which cooperates with an exhaust-gas turbocharger for compressing the air supplied to the internal combustion engine. The controlling of the electrical supercharger (ES) is implemented via a control signal, which is generated as a function of a predefined value for the compressor-pressure ratio of the electrical supercharger.

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 1000). 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: In a method for performing a functional diagnosis on a ventilation system of a crankcase of an internal combustion engine, a pulse valve is situated in a vent line. The pulse valve is controlled as a function of the pressure in the crankcase, the pressure being determined by a pressure sensor. In response to a high pressure, the pulse valve is opened to allow the vapors to be discharged via an intake pipe. In this context, the pulse valve is controlled as a function of operating requirements, exhaust gas requirements, and/or load conditions. Based on the pressure characteristic, it can be detected, for example, whether the oil level is sufficient, whether there is a leak in the closed ventilation system, or whether the internal combustion engine exhibits increased wear. As a result of an optimized operating method, blowby gases can be reduced, as well as emissions, and friction losses in the crankcase.

Abstract: 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. It is provided that, upon detection of a malfunction of at least one of the evaluation electronics, the at least one cylinder assigned to this evaluation electronics is linked to the control of at least one cylinder having intact evaluation electronics.

Abstract: A method for regulating the supercharging of an internal combustion engine is provided, which method does not require adaptation offset. A manipulated variable is formed from the deviation between a setpoint value of an operating parameter of the internal combustion engine and an actual value of this operating parameter, the manipulated variable having at least one component supplied by an integral action controller. For the integral component, a limit value is specified which is determined from multiple operating parameters of the internal combustion engine. The limit value is adapted by adaptively determining a first of the operating parameters used for determining the limit value as a function of a second operating parameter.

Abstract: A device and a method for storing and/or analyzing data in a memory in a motor vehicle is described, the data being transmitted in the vehicle over a data bus to which are or can be connected components such as vehicle systems, sensors, actuators and other vehicle components. The memory is designed as a central memory medium for the components connected to the data bus, and it is also connected to the data bus in the vehicle. The data is stored permanently in the memory medium for the entire service life of the vehicle. In addition, the data is interpreted by analyzing arrangements connectable to the memory medium, preferably in such a manner that a measure of the usage and/or wear of the vehicle and/or its components is obtained.

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: A method for starting a combustion engine including a starter and a speed sensor that supplies an output signal as a function of speed, and a device for measuring the vehicle system voltage to record a characteristic curve of the battery voltage during a starting phase and after the starting phase. The crankshaft position is ascertained from the characteristic curve of the battery voltage, during the starting phase of the combustion engine, in starter operation.

Abstract: Devices and methods for knock detection and knock control are described, in which, in addition to the customary component parts, the knock-detection circuit has a filter with switchable filter characteristic. The switchover of the filter characteristic, i.e. the shift, for example, of the mid-frequency of the filter, is carried out taking into consideration specifiable quantities or parameters, for instance, as a function of rotational speed. During the switchover of the filter characteristic, i.e. the shift of the mid-frequency, problems could occur in the knock detection; that is why measures are proposed which carry out the knock detection according to a special knock-detection algorithm during a switchover phase lasting a specifiable time.

Abstract: A method for controlling the compression ratio &egr; in a supercharged combustion engine. The latter is provided with a control device in which a maximum final compression temperature T2,max is ascertained, and, within the framework of a precontrol, an optimum efficiency compression ratio &egr;opt is ascertained. The knock limit is determined from the compression ratio &egr;, to which it corresponds, and which is ascertained from the precontrol. As a function of the efficiency curve in the characteristics map &eegr;=f, a further change occurs in compression ratio &ggr; or a setting back of the change in compression ratio &egr;. The values learned for &egr; and the ignition angle as a function of the operating point are permanently stored in a characteristics map to which the engine control has access.