Device and method for monitoring the intake manifold pressure of an internal combustion engine

US7634940B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Dirk Hartmann · Aßling, DE
• Georg Mallebrein · Stuttgart, DE
• Werner Mezger · Weinsberg, DE
• Henri Barbier · Schwieberdingen, DE
• Soenke Mannal · Pfalzgrafenweiler, DE

Key dates

• Filing date: Mar 19, 2008
• Grant date: Dec 22, 2009
• Expiry date: Mar 19, 2028

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 and a device for monitoring the intake manifold pressure of an internal combustion engine in which a measured signal for the intake manifold pressure is compared with a reference signal for the intake manifold pressure. For a deviation of the measured signal for the intake manifold pressure from the reference signal for the intake manifold pressure, a tolerance range is predefined for error-free operation of the intake and/or exhaust valves of at least one cylinder of the internal combustion engine. A check is made whether the measured signal for the intake manifold pressure deviates from the reference signal for the intake manifold pressure by more than a predefined tolerance range. In this case an erroneous operation of the intake and/or exhaust valves is detected; otherwise an error-free operation of the intake and/or exhaust valves is detected.