Method of operating an internal combustion engine

US6925864B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hans-Ernst Beyer · Sachsenheim, DE
• Frank Kastner · Schwieberdingen, DE

Key dates

• Filing date: Jan 12, 2004
• Grant date: Aug 9, 2005
• Expiry date: Feb 22, 2024

Classification

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

Abstract

The invention is directed to a method for operating an internal combustion engine including an actuating member in an air supply for adjusting an air mass to be supplied to the engine. In the method, a position of the actuating member is adapted to an instantaneous operating state by a short-time adaptation and a position of the actuating member is adapted by a long-time adaptation to compensate for longer term influences on the position of the actuating member. For a long-time adaptation, a long-time adaptation value is formed for the position of the actuating member in dependence upon a minimum short-time adaptation value for the position of the actuating member which was formed during the short-time adaptation. A leakage in the air supply is diagnosed in dependence upon the long-time adaptation value.