Robert Boschgmbh

Eberhard Klein

Georg Mallebrein

Gholamabas Esteghlal

Patrick Hochstrasser

Lutz Reuschenbach

Michael Drung

Christina Sauer

Jochen Gross

Lionel Martin

Juergen Schiemann

Alex Grossmann

Johannes Meiwes

Torsten Baumann

Manfred Kirschner

Reiner Schweinfurth

Bernd Tepass

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.

Method and device as well as computer program for controlling an internal combustion engine

An electronic circuit for detecting measured quantities has a sensor unit for generating an analog measurement signal and a signal detecting unit () with a first analog/digital converter for digitizing the analog measurement signal. Differences in the fluctuations of the supply voltages that are supplied to the sensor unit and the signal detecting unit essentially result in the generation of undesirable fluctuations in the measurement signal. To minimize these effects or compensate for them, the digitized measurement signal is corrected In response to a voltage signal (U) that represents the imprecision xof the first supply voltage (VS).

Electronic circuit for measured parameter recording

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.

Method and device for controlling an internal combustion engine

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.

Method, device and computer program for controlling 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

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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Plochingen, Germany

Eberhard Klein