Method of controlling the temperature of an exhaust gas probe

US5167120A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Erich Junginger · Stuttgart, DE
• Lothar Raff · Waiblingen, DE
• Eberhard Schnaibel · Hemmingen, DE

Key dates

• Filing date: Feb 25, 1992
• Grant date: Dec 1, 1992
• Expiry date: Feb 25, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/1494
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention is directed to a method for the temperature open-loop control and closed-loop control of exhaust gas probes for mixture control systems having several heatable exhaust gas probes. For this purpose, the temperature of one exhaust gas probe is closed-loop controlled in a control loop and the heaters of other exhaust gas probes are open-loop controlled. The closed-loop controlled exhaust gas probe controls the open-loop controlled exhaust gas probes insofar as the actuating variable of the temperature control loop is used as the output value for the temperature open-loop control of the other exhaust gas probes.