Method for forming a fuel-metering signal for an internal combustion engine

US6029642A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ernst Wild · Oberriexingen, DE
• Klaus Joos · Walheim, DE
• Werner Mezger · Weinsberg, DE
• Klaus Hirschmann · Leonberg, DE
• Thomas Oelker · Rochlitz, DE
• Nikolaus Benninger · Lambach, DE
• Werner Hess · Stuttgart, DE
• Christian Tischer · Hemmingen, DE
• Georg Mallebrein · Stuttgart, DE

Key dates

• Filing date: Nov 30, 1998
• Grant date: Feb 29, 2000
• Expiry date: Nov 30, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/1475
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a method for computing a fuel-metering signal for adjusting a pregiven lambda value for the composition of the air/fuel mixture of an internal combustion engine. In the method, a first signal is formed which represents the air quantity flowing into the engine and a second signal is formed on the basis of the first signal so that a first lambda desired value adjusts when using its second signal as a fuel-metering signal. Various additional second lambda desired values are formed as a function of operating parameters of the engine. A selection is made of those second lambda desired values having the highest priority and the fuel-metering signal is formed by weighting the second signal with the second lambda desired value of the highest priority.