Method for checking the operability of an ambient pressure sensor of an internal combustion engine

US7133765B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hans-Ernst Beyer · Sachsenheim, DE
• Uwe Dworzak · Stuttgart, DE
• Frank Kastner · Schwieberdingen, DE
• Taskin Ege · Tamm, DE
• Denis Kraemer · Markgröningen, DE

Key dates

• Filing date: Jun 12, 2003
• Grant date: Nov 7, 2006
• Expiry date: Jun 12, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating an internal combustion engine is described, in which the ambient pressure is determined by an ambient pressure sensor and the pressure in an intake manifold of the internal combustion engine is determined by an intake manifold pressure sensor. In this method the reliability performance of the ambient pressure sensor is checked by comparing the ambient pressure to a starting value that is obtained by the intake manifold pressure sensor before a starting process of the internal combustion engine. The comparison is only performed if a preceding check of the intake manifold pressure sensor yields the result that it is operational.