Method and device for calibrating a pressure sensor

US6802209B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Joos · Walheim, DE
• Jens Wolber · Gerlingen, DE
• Thomas Frenz · Nördlingen, DE
• Hansjoerg Bochum · Leinfelden, DE
• Matthias Kuesell · Kornwestheim, DE
• Markus Amler · Rutesheim, DE

Key dates

• Filing date: Sep 5, 2002
• Grant date: Oct 12, 2004
• Expiry date: Jan 9, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/31
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method and an arrangement for calibrating a pressure sensor (7) of a fuel-metering system of an internal combustion engine wherein the fuel-metering system includes: a high-pressure pump (2) for pumping fuel from a low-pressure region (ND) into a high-pressure region (HD) injectors (5) for metering the fuel from the high-pressure region (HD) into combustion chambers (6) of the internal combustion engine with the injectors (5) being drivable in dependence upon operating characteristic variables, and the pressure sensor (7) for measuring the pressure in the high-pressure region (HD). To calibrate the pressure sensor (7) so that the offset error is minimized, it is suggested that a pressure, which is present in the high-pressure region (HD), is applied as a reference pressure; that the pressure, which is present in the high-pressure region (HD), is measured as the sensor pressure by the pressure sensor (7); and, that the characteristic line of the pressure sensor (7) is so corrected that the difference of reference pressure and sensor pressure is minimized.