This paper describes the design and operation of a thick-film zirconia air-fuel ratio sensor with a heater. This sensor is composed of two zirconia plate cells, a stoichiometric cell and a lean cell, laminated on the platinum heater. It is fabricated as one body using a thick-film process. The pair of cells has a gas diffusion chamber and a slit type gas diffusion aperture.The sensing principle is based on the rate-determining diffusion of oxygen molecules at the gas diffusion aperture. By using an oxygen pumping phenomenon, air-fuel ratios of the stoichiometric and lean regions can be detected.As this sensor is heated to a high constant temperature, it has sufficient accuracy without any additional temperature compensation. Its starting time is short and response time is very quick.
Thick-Film Zirconia Air-Fuel Ratio Sensor with a Heater for Lean Mixture Control Systems
Sae Technical Papers
SAE International Congress and Exposition ; 1985
1985-02-01
Conference paper
English
Thick-Film Zirconia Air-Ratio Sensor with a Heater for Lean Mixture Control Systems
Automotive engineering | 1985
|A Zirconia-Based Lean Air-Fuel Ratio Sensor
SAE Technical Papers | 1978
|Development of Thick Film Type Air-Fuel Ratio Sensor
British Library Conference Proceedings | 2002
|Development of thick film type air-fuel ratio sensor
Automotive engineering | 2002
|SAE Technical Papers | 1985
|