Method and device for estimation of combustion chamber pressure

US7292926B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Thorsten Schmidt · Milpitas, US
• Winfried Schultalbers · Meinersen, DE
• Henning Rasche · Gaimersheim, DE
• Hermann Fehrenbach · Herxheim, DE
• Joachim Scheu · Bad Wimpfen, DE

Key dates

• Filing date: Nov 5, 2003
• Grant date: Nov 6, 2007
• Expiry date: Jan 8, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/1004
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

It is claimed that statements regarding cylinder pressure are obtained for optimization of the combustion process in internal combustion engines. The internal combustion engine is modeled with a plurality of model parameters (1 to 5) for this purpose. Once it has been acquired, a model alternating torque (MW) is compared to an actual alternating torque (IW). The model parameters are modified in accordance with the result of the comparison. The model yields realistic values of the combustion chamber value on the basis of the modified model parameters.