Method and arrangement for controlling the injection of fuel in an internal combustion engine

US5070836A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Josef Wahl
• Alf Loffler · Markgröningen, DE
• Hermann Grieshaber · Ingolstadt, DE
• Wilhelm Polach · Asperg, DE
• Ewald Eblen · Stuttgart, DE
• Joachim Tauscher · Stuttgart, DE
• Helmut Laufer · Gerlingen, DE
• Ulrich Flaig
• Johannes Locher · Stuttgart, DE
• Manfred Birk · Oberriexingen, DE
• Gerhard Engel · Stuttgart, DE
• Alfred Schmitt · Ditzingen, DE
• Pierre Lauvin · Francheville, FR
• Fridolin Piwonka · Asperg, DE
• Anton Karle · Villingen-Schwenningen, DE
• Hermann Kull · Stuttgart, DE

Key dates

• Filing date: Sep 5, 1990
• Grant date: Dec 10, 1991
• Expiry date: Sep 5, 2010

Classification

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

Abstract

The invention is directed to a method and an arrangement for controlling the fuel injection in a high-pressure fuel pump. Magnetic valves determine the fuel quantity to be injected into the engine. The magnetic valve is controlled during the pumping phase of the pumping element in such a manner that first a preinjection and then a main injection is carried out. In specific operating conditions, the control apparatus determines the duration of the drive pulses for the magnetic valve at which a preinjection just takes place. With the duration of the drive pulses as a basis, the control apparatus forms compensating signals for the drive pulses which effect preinjection and stores the same.