Method for operating an internal combustion engine

US8275535B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Matthias Heinkele · Weil der Stadt, DE
• Lutz Reuschenbach · Stuttgart, DE
• Michael Drung · Rochlitz, DE
• Soenke Mannal · Pfalzgrafenweiler, DE

Key dates

• Filing date: Jul 22, 2009
• Grant date: Sep 25, 2012
• Expiry date: Mar 18, 2031

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 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 …