Thick-film zirconia air-fuel ratio sensor with a heater for lean mixture control systems

Book · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5042079

Suzuki, S; Sasayama, T; Miki, M; Yokono, H; Iwanaga, S; Veno, S

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.

• Research Organization: Hitachi Research Lab., Hitachi, Ltd.
• OSTI ID: 5042079
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACCURACY
APERTURES
CHALCOGENIDES
DESIGN
EFFICIENCY
ELEMENTS
ENGINES
FABRICATION
FLOWMETERS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
HEATERS
INTERNAL COMBUSTION ENGINES
LAYERS
MEASURING INSTRUMENTS
METALS
METERING
METERS
MONITORING
NONMETALS
OPENINGS
OPERATION
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
PUMPING
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES