Lambda control method

US5787867A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Eberhard Schnaibel · Hemmingen, DE
• Lothar Raff · Waiblingen, DE
• Ernst Wild · Oberriexingen, DE
• Klaus Hirschmann · Leonberg, DE
• Frank Blischke · Stuttgart, DE

Key dates

• Filing date: Mar 13, 1997
• Grant date: Aug 4, 1998
• Expiry date: Mar 13, 2017

Classification

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

Abstract

The invention is directed to a method for controlling the composition of the air/fuel mixture for an internal combustion engine. In the method, the mean value of the control oscillation is influenced via a change of the delay times tv with which a sign reversal of the actuating variable change is delayed. The dead time of the control is determined from the time-dependent performance of the control actuating variable and is considered for the change of the delay times tv.