Method and device for operating an internal combustion engine

US7080547B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

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

Key dates

• Filing date: May 5, 2004
• Grant date: Jul 25, 2006
• Expiry date: Jul 1, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16N2250/05
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method and a device for operating an internal combustion engine having an intake manifold and a ventilation system may allow a reliable and fault-free diagnosis of a fault in the ventilation. The ventilation system may be a tank ventilation or a crankcase ventilation. The ventilation duct is conducted to the intake manifold of the internal combustion engine. At least one pressure differential may be determined between an intake-manifold pressure or an ambient pressure, on the one hand, and a pressure in the ventilation duct, on the other hand. A fault in the ventilation may be diagnosed as a function of the at least one pressure differential.