Robert Boschgmbh

Lutz Reuschenbach

Ernst Wild

Georg Mallebrein

Werner Hess

Eberhard Schnaibel

Christian Koehler

Michael Drung

Werner Mezger

Michael Oder

Juergen Pantring

Roland Herynek

Kristina Eberle

Nikolaus Benninger

Dieter Volz

Hans Veil

Gudrun Menrad

Thorsten Fritz

Mirjam Steger

Hong Zhang

Manfred Pfitz

Detlef Heinrich

Patrick Menold

Sabine Wegener

Harald Von Hofmann

Erich Schneider

Andreas Roth

Matthias Heinkele

Soenke Mannal

Oliver Krannich

Eberhard Klein

Hendrik Koerner

Kristina Milos

Jochen Gross

Oliver Schlesiger

Lionel Martin

Andreas Blumenstock

Winfried Moser

Gholamabas Esteghlal

Udo Diehl

Stefan Reimer

Karsten Mischker

Volker Beuche

Bernd Rosenau

Joachim Luh

Hermann Gaessler

Christian Grosse

Juergen Schiemann

Ruediger Weiss

Martin Klenk

Rainer Walter

Alex Grossmann

Lothar Raff

Dirk Hartmann

Karl-Heinz Senger

Helmut G Schwegler

Torsten Baumann

Holger Bellmann

Klaus Hirschmann

Andreas Baumann

Ulrich Kuhn

Ralf Buehrle

Rolf-Hermann Mergenthaler

Andreas Lassl

Frank Blischke

Hans Hillner

Stephan Uhl

Markus Deissler

Axel Stuber

Michael Nicolaou

Bernd Roos

Christian Klinke

Lanouar Chouk

Juergen Ulm

Eberhard Frech

Joerg Kerner

Rine Pelders

Michael Hermann

Frank Schiller

Wilfried Tuleweit

Werner Jaksch

Alois Moser

Johan Luyckx

Lothar Gamer

Bernhard Ebinger

Eduard Weiss

Martin Froehlich

Thomas Hotz

Nicolas Ide

Miriam Steger

Franco Baiocchi

Michael Order

Klaus Benninger

Peter-Juergen Schmidt

Werner Krauss

Faouzi Takni

A method is described for monitoring a camshaft adjustment of an internal combustion engine in a first operating mode, in which, depending on a time characteristic of an actual value of the angular position of the camshaft adjustment and a time characteristic of a first setpoint value of the angular position of the camshaft adjustment, a decision is made that there are errors in the camshaft adjustment, the decision also depending on a time characteristic of a second setpoint value of the angular position of the camshaft adjustment, the first setpoint value and the second setpoint value each being ascertained at the same operating point of the internal combustion engine, and the first setpoint value for operating the internal combustion engine being ascertained in the first operating mode and the second setpoint value for operating the internal combustion engine being ascertained in a second operating mode.

Method and device for controlling an 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 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 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.

A method for diagnosing a diverter valve of an internal combustion engine having a compressor is provided, for which diagnosis a variation over time of a charging pressure of the internal combustion engine as a result of a predefined triggering of the diverter valve is analyzed, the triggering of the diverter valve taking place in such a way that a diverter valve moved in the direction of its closing position is expected. Depending on the resulting variation over time of the charging pressure, an open jamming diverter valve is diagnosed if the variation over time of the charging pressure is not plausible with an expected variation over time for a diverter valve moved in the direction of its closing position.

Method and device for diagnosing a diverter valve of an internal combustion engine having a compressor

A method for setting a mass flow rate of air to be provided in a charging mode; in the charging mode (where a throttle valve is open), the pressure prevailing in an induction pipe only being set via an adjustable mass flow rate of supplied air; a requested torque corresponding to a mass flow rate of air into a cylinder, the mass flow rate of air into the cylinder being adjustable via the pressure in the induction pipe; to set the mass flow rate of air into the cylinder, the pressure in the induction pipe being adjusted by a control system in accordance with a specifiable dynamic charge response characteristic.

Method and device for controlling a charging device of an internal combustion engine during a charging mode

In a method for monitoring a camshaft adjustment of an internal combustion engine in which a setpoint value of an angular position is compared with an actual value of the angular position, a more differentiated fault diagnosis is achieved in that at least two fault types are able to be detected on the basis of the profile of the actual value over time.

Method for monitoring a camshaft adjustment of an internal combustion engine

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.

Method and device for controlling the opening of an intake valve of an internal combustion engine

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

A method and a device are proposed for controlling and/or diagnosing a control system influencing a mass flow. In this context, a correction value is calculated, which corrects the controlling, or is evaluated for diagnostic purposes. The correction value, in this context, is derived from the line resistance of the mass flow line.

Method and device for controlling and/or diagnosing a control system that influences a mass flow

The invention is directed to a method and an arrangement for determining a fuel wall film mass in an internal combustion engine () having intake manifold injection. The method and arrangement provide a precise as possible transition compensation also for the case wherein the fuel injection into the open inlet valve () of a cylinder () takes place. The fuel wall film mass is determined starting from a fuel injection which takes place completely in advance of opening of the inlet valve () of the cylinder () of the internal combustion engine () into the intake manifold (). The value so determined for the fuel wall film mass is corrected in dependence upon the ratio between the fuel mass, which is injected via the open inlet valve () into the combustion chamber () of the cylinder (), and the total injected fuel mass.

Method and arrangement for determining a fuel wall film mass

A method detects mass flows to the intake manifold of an internal combustion engine having a device for controlling the air supply to the intake manifold and having a sensor for detecting the intake manifold pressure and having a control apparatus for evaluating a trace of the intake manifold pressure. In the context of the method, when the internal combustion engine is switched off, the supply of air to the intake manifold is reduced in a predetermined manner and the trace of the intake manifold pressure, which adjusts thereupon, is evaluated for detecting the mass flows.

Method for determining mass flows into the inlet manifold of an internal combustion engine

A method for operating an internal combustion engine. The latter has at least one combustion, one induction pipe, and one throttle valve. From the actual position of the throttle valve, a gas charge of the combustion chamber is defined. To improve the emissions and fuel consumption characteristics of the internal combustion engine, the minimum gas pressure is measured that exists in the induction pipe assigned to the combustion chamber at the end of the intake stroke. From this gas pressure, a value is determined which more closely approximates the actual gas charge of the combustion chamber.

Method, a computer program, and a control and regulating unit for operating an internal combustion engine

The pressure in an underpressure store of a pneumatically operated servo system is controlled by a method wherein the underpressure store is charged with an underpressure via a suction line. A higher desired pressure for the underpressure store is pregiven in a rest state of the servo system wherein the system is not actuated and no actuation is expected. A lower desired pressure for the underpressure store is preset in a state wherein the servo system is actuated or an actuation is expected.

Method, computer program and arrangement for controlling the pressure in an underpressure store of a pneumatically operated servo system

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Stuttgart, Germany

Lutz Reuschenbach