Air-fuel ratio detector and method of measuring air-fuel ratio

Patent · Tue Mar 11 04:00:00 EST 1986

OSTI ID:5900010

Sakurai, S; Kamo, T; Ikai, T

An air-fuel ratio detector is described for detecting oxygen density in exhaust gas emitted from an engine which consists of: a DC constant-current supply and constant voltage supply; a tubular body; first and second partition members hermetically contacting an inner peripheral surface of the tubular body transversely of an axis of the tubular body, wherein at least the first partition member further comprises a solid electrolyte permeable to oxygen ions; gas dispersion means communicating a space between the partition members with the exhaust gases for introducing gas to be detected and dispersing the gas into a space defined between the first and second partition members; a first pair of electrodes separately mounted on opposite sides of the first partition member and connected to the DC constant-current supply for introducing oxygen ions by permeating into the space through the solid electrolyte; a second pair of electrodes separately mounted on opposite sides of one of the first and second partition members and connected to the DC constant-voltage supply, and means for measuring an air-fuel ratio in the gas based on a current generated between the second pair of electrodes.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Toyota
• Patent Number(s): US 4574627
• OSTI ID: 5900010
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CURRENTS
DENSITY
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRODES
ELECTROLYTES
ENGINES
EXHAUST GASES
FLUID FLOW
FLUIDS
FUEL-AIR RATIO
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METERS
MONITORING
OXYGEN METERS
PERMEABILITY
PHYSICAL PROPERTIES
SOLID ELECTROLYTES
SPACE DEPENDENCE
WASTES