Combination of lambda probes

US5658445A · kind A · utility

Inventors

• Edelbert Hafele · Karlsruhe, DE
• Ulrich Schonauer · Karlsruhe, DE
• Jorg Huber · Durmersheim, DE

Key dates

• Filing date: Aug 28, 1995
• Grant date: Aug 19, 1997
• Expiry date: Aug 28, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/1441
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a combination of a heated lambda sensor with a stepped or binary sensor characteristic and another heated lambda sensor to determine the lambda value in a gas mixture, e.g. in the exhaust gas preferably of internal combustion engines, the output signal from one lambda sensor being used to calibrate the other one, and the two lambda sensors are arranged closely beside each other, the other lambda sensor having a wide-baud sensor characteristic.