Robert Boschgmbh

Lionel Martin

Georg Mallebrein

Lutz Reuschenbach

Michael Drung

Eberhard Klein

Jochen Gross

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.

Growing community of inventors

Ludwigsburg, Germany

Lionel Martin