Method and arrangement for controlling the fuel metered in a diesel engine

US5235949A · 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: Jul 26, 1990
• Grant date: Aug 17, 1993
• Expiry date: Jul 26, 2010

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2250/32
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method and arrangement for preparing a fuel-metering signal M for a diesel engine starting with measured variables such as accelerator pedal position, rotational speed, lambda, exhaust gas temperature or torque. A fuel quantity request MW is pregiven in dependence upon the position of the accelerator pedal. This quantity request MW is supplied to a minimum selector together with a second signal. The output signal M of the minimum selector, in turn, determines the metered fuel. The second signal derives from a precontrol characteristic field 50 in dependence upon the speed. The output signal of the precontrol characteristic field MV is influenced by the controller output signal MR in specific operating conditions.