Temperature Sensitivity Mapping of the Zirconia Oxygen Sensor: Engine Test Results

Format:

Conference/Event

Author/Creator:

Fleming, William J., author.

Conference Name:

1976 Automotive Engineering Congress and Exposition (1976-02-23 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1976

Summary:

A closed loop control system for regulation of engine air-fuel ratio at the stoichiometric value is required for effective operation of a three-way catalytic converter. System performance depends directly on accuracy of the zirconia oxygen sensor which generates a feedback signal for the system. The sensor voltage signal is known to be sensitive to exhaust temperature. In the present investigation, temperature sensitivity of the oxygen sensor was measured over a wide range of engine operating conditions.Sensor data were plotted in the form of contour lines of constant sensor voltage as a function of engine air-fuel ratio and exhaust temperature, thereby mapping sensor performance. It was found that, depending on the sensor, a fixed level of sensor voltage shifted from 0.1 to 0.7 ratios towards air-fuel ratios slightly rich of the stoichiometric ratio as exhaust temperature increased from 500°C to 700°C

Notes:

Vendor supplied data

Publisher Number:

760379

Access Restriction:

Restricted for use by site license