Abstract: A method and a device for monitoring the intake manifold pressure of an internal combustion engine in which a measured signal for the intake manifold pressure is compared with a reference signal for the intake manifold pressure. For a deviation of the measured signal for the intake manifold pressure from the reference signal for the intake manifold pressure, a tolerance range is predefined for error-free operation of the intake and/or exhaust valves of at least one cylinder of the internal combustion engine. A check is made whether the measured signal for the intake manifold pressure deviates from the reference signal for the intake manifold pressure by more than a predefined tolerance range. In this case an erroneous operation of the intake and/or exhaust valves is detected; otherwise an error-free operation of the intake and/or exhaust valves is detected.

Abstract: A method and a device for operating an internal combustion engine including at least one cylinder are described, the at least one cylinder including at least one intake valve and at least one exhaust valve and a diagnosis of at least one erroneous intake valve or at least one erroneous exhaust valve is made possible without using a position acknowledgment. A gas exchange of the at least one cylinder is diagnosed thereby.

Abstract: A method and a device as well as a computer program for controlling an internal combustion engine are provided, a torque model being used within the framework of calculating instantaneous variables and/or actuating variables. A correction of a basic value determined under standard conditions takes place in the process. In addition, to further improve the accuracy of the model, the efficiency for the conversion of the chemical into mechanical energy by which the optimum torque value is corrected, is determined at least as a function of a variable characterizing the combustion center point and a variable characterizing the opening instant of a discharge-side gas-exchange valve.

Abstract: A method and a device for operating a drive unit provide a switch between half-engine operation and full-engine operation. A switch takes place between two operating states of a first component of the drive unit as a function of a first performance quantity of the drive unit. A switch takes place between two operating states of a second component of the drive unit as a function of a second performance quantity of the drive unit. A check is performed whether switching between two operating states of the second component results in a shift of the first performance quantity over a switching threshold for switching between two operating states of the first component, and if so, the switch between the two operating states of second component is delayed until a switch between the two operating states of first component has occurred.

Abstract: A method and a device for operating an internal combustion engine having a plurality of cylinder banks which allow a simple diagnosis of a faulty deactivation of the gas exchange of at least one cylinder bank, or a simple determination of the ambient pressure. In the process, in addition to at least one first cylinder bank having activated gas exchange of at least one cylinder, a deactivation of the gas exchange of all cylinders of at least one second cylinder bank is initiated in at least one operating state of the internal combustion engine. The at least one second cylinder bank is assigned a separate intake tract. In the at least one operating state, a variable that is characteristic for the pressure in the intake tract of the at least one second cylinder bank is measured and evaluated for the presence of undesired pressure pulsations.

Abstract: In order to achieve at least a short-term reduction of the torque of an internal combustion engine (2), which comprises a range as widely adjustable as possible, causes a slight as possible thermal stress on the components of the attached exhaust gas system (5) and allows for a reduction of the fuel consumption, it is proposed that in addition to the cut off of the fuel-delivery control phase of a cylinder (4), an intake valve (17) associated with the cylinder is cut off.

Abstract: Operation of an internal combustion engine with oil lubrication and electronic fuel injection, includes the steps of determining a flow of fuel mass (mkp_ausg) evaporating out of oil, and determining a setpoint injected-fuel quantity (rk_ev) with taking into account the determined flow of fuel mass.

Abstract: A control unit for a system and a method of operating a control unit have modules that are activated. Before activation of a certain module, inquiries are made to detect cross-dependencies with other modules that have already been activated. To do so, a first storage device and a second storage device containing this information are provided. A scheduler prevents modules which interfere with one another from being activated simultaneously.

Abstract: A method and a device for operating an internal combustion engine (1) having an exhaust gas treatment system (45), in particular in a non-firing operation of the internal combustion engine (1) are described, which make it possible to implement a different request for change in the temperature gradient of the exhaust gas treatment system (45), in particular via switchover from half-engine operation to full-engine operation. In the event of a request for a change in the temperature gradient of the exhaust gas treatment system (45), a charge cycle state of at least one cylinder (11, 12, . . . 18) of the internal combustion engine (1) is modified.

Abstract: A method and a device for operating a drive unit provide a switch between half-engine operation and full-engine operation. A switch takes place between two operating states of a first component of the drive unit as a function of a first performance quantity of the drive unit. A switch takes place between two operating states of a second component of the drive unit as a function of a second performance quantity of the drive unit. A check is performed whether switching between two operating states of the second component results in a shift of the first performance quantity over a switching threshold for switching between two operating states of the first component, and if so, the switch between the two operating states of second component is delayed until a switch between the two operating states of first component has occurred.

Abstract: A method for controlling the opening of at least one intake valve of a combustion chamber in a periodically working piston engine, at least one intake valve of the combustion chamber being opened during a first partial period of a working period of the piston engine for charging the combustion chamber; and at least one intake valve of the combustion chamber being opened during a second partial period of the working period, wherein the second partial period begins after the combustion of the combustion chamber charge and has no overlap with the first partial period.

Abstract: Disclosed is a simple, easy-to-produce, and reliable connection between a shaft of a gas exchange valve and an actuator. This connection is detachable and, as a result, can be connected and disconnected multiple times. It is also possible to dispose the coupling piece on the shaft of the gas exchange valve and provide circumferential grooves on the control element of the actuator.

Abstract: A method and a device for operating an internal combustion engine having a plurality of cylinders are described, each cylinder having at least one intake valve and one exhaust valve having fully variable valve control, a fuel feed to at least one first cylinder of the plurality of cylinders being deactivated, a first quantity of fresh air being drawn in by opening the at least one intake valve of the at least one first cylinder in a first downward movement of the piston of the at least one first cylinder, and a second quantity of fresh air being ejected by opening the at least one exhaust valve with a first upward movement of the piston of the at least one first cylinder.

Abstract: The present invention relates to a method for operating an internal combustion engine with oil lubrication and electronic fuel injection, characterized by the fact that a flow of fuel mass (mkp_ausg) evaporating out of the oil is determined and taken into account in the calculation of the injected-fuel quantity (rk_ev).

Abstract: An internal combustion engine includes at least one inlet valve whose operation can be described at least by the parameters: opening angle, closing angle, valve stroke curve (H1, H2) and phase position (pn) of the valve stroke curves (H1, H2). At least one of the parameters (pn) can be continuously shifted and at least one other parameter (H1, H2) can be switched stepwise. In order to avoid jumps of the torque generated by the engine when switching over, it is suggested that, in advance of a switchover (74) of the step-wise switchable parameter (H1, H2), the continuously shiftable parameter (pn) is so adjusted (72) that, with the switchover (74) of the stepwise switchable parameter (H1, H2), at least one condition variable (rl) of the combustion of a combustion chamber assigned to the inlet valve is not changed or not significantly changed.

Abstract: A method, a device and a computer program for controlling an internal combustion engine, in which a torque model is used within the framework of calculating instantaneous variables and/or actuating variables. In doing so, a basic value ascertained under standard conditions is corrected as a function of the inert-gas rate and/or the valve-overlap angle. Moreover, to further improve the accuracy of the model, the efficiency for the conversion of the chemical energy into mechanical energy by which the optimum torque value is corrected, is determined as a function of the deviation between optimum ignition angle and an instantaneous ignition angle as well as an additional variable representing the combustion performance of the mixture. The latter is the optimum ignition angle.

Abstract: A method for determining the phase position of at least one camshaft of an internal combustion engine, the phase position for at least one camshaft being determined on the basis of operating variables of the air system.

Abstract: A method and an arrangement as well as a computer program for controlling an internal combustion engine are suggested. A torque model is utilized in the context of the computation of actual quantities and/or actuating quantities. In the context-of the torque model computation, the combustion center is considered which describes the angle at which a specific portion of the combustion energy is converted.

Abstract: An internal combustion engine (10) is operated in dependence upon operating characteristic variables such as rpm (nmot) of a crankshaft (18), temperature (Tmot) of the internal combustion engine (10) and/or temperature of the intake air (Taev). In the method, a temperature (Taevk) of the inducted air in the combustion chamber (16) is, at least in approximation, obtained from a detected or modeled temperature (Taev) of the inducted air in a region remote from the combustion chamber.

Abstract: Disclosed is a simple, easy-to-produce, and reliable connection between a shaft of a gas exchange valve and an actuator. This connection is detachable and, as a result, can be connected and disconnected multiple times. It is also possible to dispose the coupling piece on the shaft of the gas exchange valve and provide circumferential grooves on the control element of the actuator 5.