Method and device for diagnosing an intake tract of an internal combustion engine

US8463490B2 · kind B2 · utility

Assignee

• CONTINENTAL AUTOMOTIVE GMBH · DE

Inventors

• Thomas Burkhardt · Cary, US
• Jürgen Dingl · Regensburg, DE

Key dates

• Filing date: May 27, 2009
• Grant date: Jun 11, 2013
• Expiry date: Jun 11, 2030

Classification

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

Abstract

An internal combustion engine has an intake tract having a compressor. A verification is performed as to whether at least one predefined activation condition is met. A boost pressure (PUT) downstream of the compressor is sensed or determined. An adaptation characteristic curve or adaptation characteristic map (KF_AD) is adapted as a function of a rotational speed (N) of the internal combustion engine and the boost pressure (PUT) if the at least one actuation condition is met. A gradient is determined that is representative of a gradient of the adaptation characteristic curve or adaptation map (KF_AD). From the determined gradient, conclusions are drawn with respect to a fault in the intake tract of the internal combustion engine.