Regulating device for a fuel metering system of an internal combustion engine

US4461258A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfram Becker · Eberdingen, DE
• Albrecht Clement · Kornwestheim, DE
• Rolf Daumer · Laichingen, DE

Key dates

• Filing date: Sep 9, 1981
• Grant date: Jul 24, 1984
• Expiry date: Sep 9, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2041/1422
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A regulating device is proposed for a fuel metering system of an internal combustion engine having .lambda. regulation. The regulating device includes a P-I regulator, and the individual control variables of the regulator are stored in memory and are capable of being recalled in accordance with operating characteristics. By means of asymmetrical P and I components that is, different values at the transition from a lean to a rich mixture or vice versa, the average value for .lambda. can be shifted in a clearly-defined manner, so that the individual exhaust gas components are substantially adapted to the desired values at all operational points. The individual P and I components or regulator control variables are stored in memory in performance graphs, which preferably permit finely-distinguished regulator control during partial-load operation.