Abstract: A method and a device for regulating the boost pressure of an internal combustion engine having a compressor, which set a setpoint boost pressure in a rapid manner and without overshooting. An actuator is provided by which the boost pressure of the compressor is set. An actuating variable for the actuator is determined as a function of a rotational speed of the compressor.

Abstract: A method for sound control in a unit of the engine periphery of an internal combustion engine of a vehicle, in particular in an exhaust system of the internal combustion engine, a sound control signal being generated based on a detected sound emission of the unit and injected into the unit, and the sound control signal is also generated as a function of the operating mode of the internal combustion engine.

Abstract: A method for correcting a measured cylinder pressure of an internal combustion engine, in which a cylinder pressure sensor (16) is connected to a combustion chamber (4) via a duct (21), disturbing portions resulting from whistle oscillations being suppressed by determining an oscillation frequency of a gas oscillation caused in the duct (21) during a power stroke and filtering the measurement values of the cylinder pressure sensor (16) using a band-stop filter having the previously determined oscillation frequency.

Abstract: A method for coding an output signal of a sensor of an apparatus for determining a rotation angle of a shaft, in particular of a crankshaft of an internal combustion engine, the shaft being joined to a sensor wheel having teeth and tooth gaps having an asymmetrical pitch, and the sensor wheel having associated with it at least one differential sensor encompassing two sensor elements, the differential sensor generating an output signal that is a difference of signals of the two sensor elements, the output signal being a square-wave signal that can assume a first value or a second value. The rotation direction of the shaft, as well as a pitch ratio of a tooth sweeping past the sensor with respect to an adjacent tooth gap, are ascertained from the signals of the two sensor elements, and the rotation direction as well as the pitch are coded as a pulse width coded output signal.

Abstract: A method for determining the rotation speed of a rotating shaft that has associated with it a means that has markings which produce an electrical signal upon being carried past a sensor element of a sensor, the sensor encompassing an evaluation device that counts the markings carried past the sensor element within a gate time and transfers them to a control unit as a numerical value. The gate time is derived from a time increment, and a pulse having an actual time duration derived from the time increment is transferred to the control unit and is compared by the control unit with a target time duration, the numerical value being corrected using a correction value that is ascertained from a comparison of the actual time duration with the target time duration.

Abstract: A method for influencing sound in an aggregate in the periphery of an internal combustion engine of a vehicle, particularly in an exhaust system of the internal combustion engine, a sound-influencing signal being generated on the basis of a detected sound emission of the aggregate and being injected into the aggregate, in which additionally, the sound-influencing signal is generated as a function of a parameter that is independent of the operating point of the internal combustion engine.

Abstract: A method and a device for analyzing a sensor element are described, which allow a temperature dependence of the sensor element to be considered without an additional temperature sensor in particular. The sensor element outputs a signal as a function of a measured variable. The signal of the sensor element is analyzed in a first analysis operating mode to detect the measured variable. The signal of the sensor element is analyzed in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable.

Abstract: A method for diagnosing an internal combustion engine including at least one microphone associated with the internal combustion engine, the sound of the internal combustion engine being recorded and converted into an electrical signal. The electrical signal representing the sound is used for the diagnosis of the operating state of the internal combustion engine.

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: An internal combustion engine includes a charge motion flap which influences the combustion in at least one combustion chamber of the internal combustion engine. The function of the charge motion flap is monitored. At least one actual value of a variable characterizing the combustion in the combustion chamber is evaluated and the evaluation result is used for function monitoring of the charge motion flap.

Abstract: The invention relates to a method and a device (1) for controlling an internal combustion engine upon starting, having a detection means (420) which detects operating parameters of the engine, in which a calculation means (410), taking the detected operating parameters before the start of the engine into account, specifies a starting strategy, and the calculation means (410), as a function of the specified starting strategy, defines control parameters for controlling a runup to engine operating speed, and a control means (430) monitors the runup to engine operating speed, and in the event of a runup to engine operating speed that deviates from the starting strategy, the control means (430), adapts the control parameters accordingly.

Abstract: An internal combustion engine includes a charge motion flap which influences the combustion in at least one combustion chamber of the internal combustion engine. The function of the charge motion flap is monitored. At least one actual value of a variable characterizing the combustion in the combustion chamber is evaluated and the evaluation result is used for function monitoring of the charge motion flap.

Abstract: A method for monitoring the exhaust gas recirculation of an internal combustion engine by pressure sensing, in which exhaust gas is recirculated from an outlet side of a combustion chamber assemblage via an exhaust gas recirculation conduit to an inlet side of the combustion chamber assemblage. Reliable monitoring of the exhaust gas recirculation with relatively little complexity is achieved by the fact that a pressure curve is sensed in at least one combustion chamber and a thermodynamic parameter is ascertained therefrom as an actual value; that a setpoint value of the parameter, which setpoint value takes into account the current operating point of the internal combustion engine, is made available, and a deviation between setpoint value and actual value is determined; and that a datum regarding the current exhaust gas recirculation state, as compared with its normal state, is obtained from the deviation.

Abstract: A method is provided for engaging a starter pinion of a starter with a starter ring gear of an internal combustion engine during the running-down of the internal combustion engine, which internal combustion engine has an arrangement for determining rotational speed and rotational direction of a crankshaft. The starter pinion is engaged with the starter ring gear when the following conditions are satisfied: a) the speed of the internal combustion engine is below a maximum speed and above a minimum speed; and b) the rotational direction corresponds to the forward rotational direction of the crank shaft.

Abstract: In a method for starting an internal combustion engine having a sensor disk which is coupled to a crankshaft of the engine, the sensor disk having a marking via an alternating arrangement of teeth and tooth spaces, and a first sensor and a second sensor each capable of generating an electric signal which may assume at least two signal levels, being associated with the sensor disk, one of the signal levels being associated with a tooth and the other signal level with a tooth space, a rising or falling signal edge of the one signal and the signal level of the other signal being used for determining the direction of rotation and increment of the angle of rotation of the crankshaft, the starting characteristics are improved in that the absolute crankshaft angle position is saved in a non-volatile memory when the engine is shut off.

Abstract: A method for ascertaining valve timing for gas exchange valves of an internal combustion engine in which a combustion chamber pressure characteristic is determined, a state function being calculated from the combustion chamber pressure characteristic and a combustion chamber volume characteristic, and the timing of the gas exchange valves is determined by analyzing the state function.

Abstract: A method for ascertaining valve timing for gas exchange valves of an internal combustion engine in which a combustion chamber pressure characteristic is determined, a state function being calculated from the combustion chamber pressure characteristic and a combustion chamber volume characteristic, and the timing of the gas exchange valves is determined by analyzing the state function.

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 is provided for engaging a starter pinion of a starter with a starter ring gear of an internal combustion engine during the running-down of the internal combustion engine, which internal combustion engine has an arrangement for determining rotational speed and rotational direction of a crankshaft. The starter pinion is engaged with the starter ring gear when the following conditions are satisfied: a) the speed of the internal combustion engine is below a maximum speed and above a minimum speed; and b) the rotational direction corresponds to the forward rotational direction of the crank shaft.

Abstract: An internal combustion engine includes a charge motion flap which influences the combustion in at least one combustion chamber of the internal combustion engine. The function of the charge motion flap is monitored. At least one actual value of a variable characterizing the combustion in the combustion chamber is evaluated and the evaluation result is used for function monitoring of the charge motion flap.