Method and device for injecting fuel in an internal combustion engine

US6698396B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andreas Pfaeffle · Löwenstein, DE
• Juergen Biester · Eppelheim, DE
• Martin Grosser · Stuttgart, DE
• Peter Schubert · Kaarst, DE
• Juergen Hammer · Fellbach, DE
• Samuel McCaig · Eßlingen, DE

Key dates

• Filing date: Dec 12, 2001
• Grant date: Mar 2, 2004
• Expiry date: Dec 12, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a device and a method for dividing up a total fuel amount, which is to be injected into the combustion chamber of a cylinder during a combustion cycle, into a plurality of injections. To this end, a first fuel amount, which is to be injected during a first injection is determined, a fourth, minimum fuel amount for a third injection is determined, and the total fuel amount minus the first fuel amount is compared to the fourth, minimum fuel amount. When the total fuel amount minus the first fuel amount is greater than or equal to the fourth, minimum fuel amount, the first fuel amount and a second fuel amount, which is to be injected into the combustion chamber of the cylinder during a second injection, are set to zero, and a third fuel amount, which is to be injected during a third injection, is set to the total fuel amount.