Method for operating an internal combustion engine

US7568468B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jens Wolber · Gerlingen, DE
• Thomas Frenz · Nördlingen, DE
• Karsten Hinn · Gießen, DE
• Timm Hollmann · Benninger Einöde, DE
• Christian Wiedmann · Redwood City, US
• Stefan Smetana · Ludwigsburg, DE
• Laurent Nack · Stuttgart, DE

Key dates

• Filing date: Mar 31, 2004
• Grant date: Aug 4, 2009
• Expiry date: Jan 13, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M63/0225
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method for operating an internal combustion engine having a fuel pump with a drive shaft is provided, the fuel pump conveying fuel into at least one fuel-collection line, the fuel being subsequently conveyed to at least one combustion chamber via at least one fuel-injection device. In the method, a quantity of the fuel conveyed by the fuel pump into the fuel-collection line is set by means of a valve device. The valve device is configured to selectively connect a discharge side of the fuel pump to a low-pressure region of the fuel pump (during deactivation phase), and selectively disconnect the discharge side from the low-pressure region (during supply phase). In supplying the quantity of fuel, a supply rate, defined as the number of supply phases of the fuel pump per rotation of the drive shaft, is determined as a function of at least one operating parameter of the internal combustion engine.