Abstract: A method and a device for operating an internal combustion engine improve the response of the internal combustion engine and increase its torque. An exhaust valve of the combustion chamber of the internal combustion engine is opened during a discharge phase of the internal combustion engine for discharging exhaust gas, generated via combustion, from a combustion chamber into an exhaust system of the internal combustion engine. The exhaust valve is closed again and re-opened during this discharge phase.

Abstract: A pulse supercharger for internal combustion engines, in which the pulse supercharger is situated in a charge air duct. The flow cross-section of the charge air duct for a charge air flow is opened or closed via the pulse supercharger. The pulse supercharger includes two synchronously operatable rotary slide elements.

Abstract: In an automotive drive, at least one dynamic characteristic of a bearing by which the automotive drive is supported on a beam is selectively influenced during operation of the automotive drive (active bearing). It is provided that a change in an instantaneous operating variable of the automotive drive is determined from a change in a state variable of the active bearing that influences its dynamic characteristic.

Abstract: A method for determining the rotary speed of a compressor, e.g., a turbocharger of an internal combustion engine, includes detecting the pressure in a region that is downstream from the compressor and generating a corresponding pressure signal. The rotary speed of the compressor is obtained from periodic fluctuations of at least one component of the pressure signal.

Abstract: A method and a device for operating an internal combustion engine improve the response of the internal combustion engine and increase its torque. An exhaust valve of the combustion chamber of the internal combustion engine is opened during a discharge phase of the internal combustion engine for discharging exhaust gas, generated via combustion, from a combustion chamber into an exhaust system of the internal combustion engine. The exhaust valve is closed again and re-opened during this discharge phase.

Abstract: A method and a device for operating an internal combustion engine improve the response of the internal combustion engine and increase its torque. An exhaust valve of the combustion chamber of the internal combustion engine is opened during a discharge phase of the internal combustion engine for discharging exhaust gas, generated via combustion, from a combustion chamber into an exhaust system of the internal combustion engine. The exhaust valve is closed again and re-opened during this discharge phase.

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: 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 for determining the rotary speed of a compressor, e.g., a turbocharger of an internal combustion engine, includes detecting the pressure in a region that is downstream from the compressor and generating a corresponding pressure signal. The rotary speed of the compressor is obtained from periodic fluctuations of at least one component of the pressure signal.

Abstract: A device for the voltage supply for a heavy power consumer, e.g., an electric auxiliary compressor in a motor vehicle, in which the electric auxiliary compressor is supplied with voltage with the aid of two ultracaps and one high current diode. The voltage supply via the high current diode takes place starting from the battery of the vehicle electrical system, while the ultracaps provide high electric power for a short time during the starting phase of the electric auxiliary compressor at a voltage level which is doubled vis-a-vis the voltage level of the vehicle electrical system.

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 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: An impulse turbocharger for an internal combustion engine. The impulse turbocharger is adapted to be used for controlling the air flow of an air supply conduit on the intake side of an internal combustion engine. The impulse turbocharger has a rotary valve which is connected by an elastic coupling to a rotary actuator.

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 fuel cell system has a fuel cell unit including an anode, and a recirculation unit for recirculating hydrogenous operating material flowing out of the fuel cell unit back into the fuel cell unit, wherein the recirculation unit has at least one drive unit for driving a flow of an operating material, and the drive unit is configured as a pneumatic drive unit or hydraulic drive unit for utilizing an energy of a fluid.

Abstract: The invention relates to a heating and/or cooling system (2) for a motor vehicle with a combustion engine (4) and a catalytic converter (8) arranged in the exhaust gas path (6) of the combustion engine (4), comprising a burner (10) attached before the catalytic converter (8) to the exhaust gas path (6) as well as a heat exchanger (12) for transmitting heat generated in the burner (10) to a heating and/or cooling circuit (28) of the motor vehicle. It is proposed that the heat exchanger (12) be arranged behind the catalytic converter (8) in the exhaust gas path (6) of the combustion engine (4) and can be acted upon through the catalytic converter (8) with hot combustion gases from the burner (10).

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: An impulse turbocharger for an internal combustion engine. The impulse turbocharger is adapted to be used for controlling the air flow of an air supply conduit on the intake side of an internal combustion engine. The impulse turbocharger has a rotary valve which is connected by an elastic coupling to a rotary actuator.

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 an internal combustion engine improve the response of the internal combustion engine and increase its torque. An exhaust valve of the combustion chamber of the internal combustion engine is opened during a discharge phase of the internal combustion engine for discharging exhaust gas, generated via combustion, from a combustion chamber into an exhaust system of the internal combustion engine. The exhaust valve is closed again and re-opened during this discharge phase.