Robert Boschgmbh

Michael Drung

Lutz Reuschenbach

Matthias Heinkele

Patrick Menold

Georg Mallebrein

Soenke Mannal

Eberhard Klein

Jochen Gross

Lionel Martin

Ernst Wild

Ruediger Weiss

Andreas Roth

Alex Grossmann

Dirk Hartmann

Andreas Schmidt

Jochen Laubender

Alexandre Wagner

Torsten Baumann

Karsten Kroepke

Rainer Maier

Markus Deissler

Oliver Krannich

Sabine Wegener

Manfred Dietrich

Benedikt Alt

Thomas Baumann

Elias Calva

Rainer Hild

Kristina Milos

Jean-Marc Tonye Djon

Christoph Schweizer

Frank Schiller

Martin Kroener

Nicolas Ide

Fabian Straub

Tobias Zolg

A method for the operation of a particulate filter in an exhaust aftertreatment system of a combustion engine () with the following steps: set up () a pressure difference model, which models a measured pressure difference (&#x394;p) which drops across the particulate filter () as a function () of a volume flow ({dot over (V)}) through the particulate filter () with an offset value (a, C); measure () multiple measurement values () for the pressure difference (&#x394;p) at different volume flows ({dot over (V)}) and solve () the pressure difference model as a function of the pressure difference (&#x394;p), whereby the offset value (a, C) is also determined.

Method for operating a particulate filter in an exhaust aftertreatment system of a 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 and a device for operating an internal combustion engine having a mass-flow line are provided, which allow the actual charge to be adapted to the setpoint charge of the internal combustion engine at a desired dynamic. A mass flow is supplied to the internal combustion engine via the mass-flow line. A setpoint value is specified for a characteristic quantity of the mass flow to the internal combustion engine. The setpoint value of the characteristic quantity of the mass flow is formed starting from a balance of the mass flow flowing into the mass flow line and the mass flow discharged from the mass flow line according to a predefined time characteristic.

Method and device for operating an internal combustion engine having a mass flow line

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

A method and a device are provided for operating an internal combustion engine which allow for an improved diagnosis of the valve mechanism of cylinders of the internal combustion engine. For this purpose, a variable characteristic of a suction performance of a cylinder of the internal combustion engine is ascertained. The variable characteristic of the suction performance is ascertained as a function of the mass flow flowing into an intake manifold of the internal combustion engine and of a change of the intake manifold pressure during an intake phase of the cylinder.

Method and device for operating an internal combustion engine

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.

In a method for operating a direct-injection internal combustion engine, a position of at least one piston inside a cylinder in which the combustion engine is at a standstill is determined; and a starting cylinder into which fuel is injected first is selected for a start following the standstill. An instantaneous charge of the starting cylinder is determined as a function of a duration of the standstill of the combustion engine. A distance (d) between the piston of the starting cylinder and a specified position of the piston is calculated. A minimum distance of the piston of the selected cylinder is determined as a function of the instantaneous charge; and another cylinder is selected as starting cylinder if the distance (d) between the piston of the starting cylinder and the specified position is less than the minimum distance.

Method for operating an internal combustion engine, and control or regulating device for an internal combustion engine

A method and a device are provided for operating an internal combustion engine, which make possible an improved characteristics curve correction of an actuator in an air supply of the internal combustion engine. In the process, an air mass flow supplied to the internal combustion engine is influenced via the actuator in an air supply. For the setting of an actuating position of the actuator having a specified, e.g., minimum, air mass flow, starting from a specified actuating position, the actuator is moved by an offset value of the actuating position. The offset value of the actuating position is corrected as a function of an offset value for the air mass flow.

A method and a device for operating an internal combustion engine having exhaust-gas recirculation are provided, which make it possible to dispense with an ambient-pressure sensor. In this context, an intake-manifold pressure and an ambient pressure are modeled. The intake-manifold pressure is modeled as a function of the modeled ambient pressure. The intake-manifold pressure is also measured. The modeled intake-manifold pressure is compared to the measured intake-manifold pressure. The modeled ambient pressure is adapted as a function of the comparison result. The modeled ambient pressure is adapted only when the exhaust-gas recirculation is inactive.

Method and device for operating an internal combustion engine having exhaust-gas recirculation

An internal combustion engine () is operated in dependence upon operating characteristic variables such as rpm (nmot) of a crankshaft (), temperature (Tmot) of the internal combustion engine () and/or temperature of the intake air (Taev). In the method, a temperature (Taevk) of the inducted air in the combustion chamber () 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. To simplify the programming, it is suggested that the determination of the temperature (Taevk) of the inducted air in the combustion chamber () takes place under the assumption that the inducted air has a modeled or detected initial temperature (Taev) and that the intake air comes into thermal contact with a typical component () during a contact time (tcontact) which is typical for a type of the internal combustion engine () and for an operating state of the internal combustion engine () and the typical component has a modeled or detected temperature (Tev).

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

An internal combustion engine includes a combustion chamber, a crankshaft and inlet and outlet valves. The engine is operated with a method wherein a fresh air charge (rl) of the combustion chamber and the engine rpm (nmot) are considered when computing a pressure (ps) in a region lying upstream of the inlet valve. The computation is done by utilizing at least one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine. Or, a pressure (ps) in the above region and the rpm (nmot) of the crankshaft are considered when computing the fresh air charge (rl) of the combustion chamber by utilizing one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine.

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Muehlacker, Germany

Michael Drung