Method and device for controlling an internal combustion engine

US7051710B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Patrick Hochstrasser · Tamm, DE
• Christina Sauer · Memmingen, DE
• Gholamabas Esteghlal · Ditzingen, DE
• Georg Mallebrein · Stuttgart, DE
• Eberhard Klein · Plochingen, DE

Key dates

• Filing date: Sep 6, 2002
• Grant date: May 30, 2006
• Expiry date: Sep 6, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

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.