Robert Boschgmbh

Matthias Heinkele

Michael Drung

Patrick Menold

Lutz Reuschenbach

Soenke Mannal

Christof Thiel

Andreas Bethmann

Kai Jakobs

Alexander Kaisser

Martin Kroener

A method for adapting a valve actuating variable for controlling an intake and/or an exhaust valve of an internal combustion engine, including setting a predetermined operating state of the internal combustion engine; determining a charge specification, which specifies an instantaneous air charge in one of the cylinders of the internal combustion engine, in the predetermined operating state; and adapting the valve actuating variable as a function of the charge specification.

Method and device for adapting a valve actuating variable for an intake and/or exhaust valve of an internal combustion engine

In a method for diagnosing a valve in a fluid supply line to a suction line of an air system of a combustion engine, the fluid supply line being is part of an exhaust-gas recirculation system or a crankcase ventilation system, when the valve is actuated, a first pressure in the suction line is monitored for change, and an error of the valve is detected if the change of the first pressure lies outside a specific reference range when the valve is actuated.

Method for diagnosing a valve of a fluid supply line to a line of an air system of a combustion engine

In a method for operating an internal combustion engine having a compressor, the diagnosing of a clutch of the compressor is achieved without an additional sensor system. The compressor is turned on via the clutch, and a variable characterizing the air-mass flow to the internal combustion engine is ascertained. A first value of the variable characterizing the air mass flow before turning on the compressor is compared to a second value of the variable characterizing the air mass flow after turning on the compressor by closing the clutch, and an error is detected as a function of a deviation between the first value and the second value of the variable characterizing the air mass flow.

Method and device for operating an internal combustion engine having a compressor for compressing the air supplied to the internal combustion engine

A method for providing a characteristic quantity for a state of an air system of a supercharged internal combustion engine includes: detecting a characteristic quantity measured value as characteristic quantity information with the aid of a sensor; providing a characteristic quantity model, using which a characteristic quantity model value is computed on the basis of one or more quantities different from the characteristic quantity measured value; and providing the characteristic quantity either based on the characteristic quantity measured value or on the characteristic quantity model value computed by the characteristic quantity model, as a function of a state of the air system.

Method and device for providing air mass flow information in a supercharged internal combustion engine

A method for operating an internal combustion engine, in which at least one first influence variable influences a state variable of the air in the intake manifold. The state variable of the air in the intake manifold is ascertained while taking into account a plurality of influence variables, which influence the state variable, while using a first physical relationship. The same state variable is ascertained while taking into account a plurality of influence variables, which influence the state variable of the air in the intake manifold while using a second physical relationship. A specific adjusting parameter, which represents a specific error in the influence variable, is linked to each influence variable. The adjusting parameters are learned and monitored in the operation of the internal combustion engine. A certain adjusting parameter is learned and monitored in an operating range of the internal combustion engine in which the other adjusting parameters have a lesser influence on the state variable than that certain adjusting parameter, and in this context, the certain adjusting parameter is adjusted in such a way that the state variable ascertained by using the first physical relationship is at least approximately equal to the state variable ascertained by using the second physical relationship.

Method for operating an internal combustion engine

A method for diagnosing an electrically controllable pop-off valve of a turbo-charging device of an internal combustion engine, which pop-off valve is situated in a pop-off pipe bypassing the compressor, includes: providing a reading regarding an air mass flow supplied by an air supply channel to the internal combustion engine; after the activation of the pop-off valve in order to switch over the pop-off valve, analyzing the time curve of the air mass flow reading in order to determine, within a specified time after the beginning of the activation of the pop-off valve, a local maximum of the air mass flow indicated by the air mass flow reading; and detecting a fault of the electrically controllable pop-off valve if the local maximum of the air mass flow is not able to be determined within the specified time.

Method and device for diagnosing a pop-off valve of a turbocharger

In a method and a device for operating an internal combustion engine, a first variable characterizing the air-mass flow to the internal combustion engine is determined, and a second variable characterizing the air-mass flow is determined. The second variable characterizing the air-mass flow is used to derive a third variable characterizing the air-mass flow, which is delayed in time with respect to the second variable characterizing the air-mass flow. A difference is formed between the second variable characterizing the air-mass flow and the third variable characterizing the air-mass flow. The first variable characterizing the air-mass flow is corrected by the difference.

Method and device for operating an internal combustion engine

In a method for operating an internal combustion engine, a sensor for detecting and/or an actuator for setting a performance quantity of the internal combustion engine is/are monitored for the presence of a malfunction. Monitoring is performed at a first operating point of the internal combustion engine at a lower load and at an operating point of the internal combustion engine at a higher load. The two operating points are set alternatingly, and at least one of the two operating points is set multiple times for a single monitoring operation.

Method for operating an internal combustion engine, computer program product, computer program, and control and/or regulating device for an internal combustion engine

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Weil der Stadt, Germany

Matthias Heinkele