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

Patent · Tue Feb 18 04:00:00 EST 1986

OSTI ID:6069451

Sakurai, S; Ikai, T

This patent describes an air-fuel ratio detector for detecting oxygen density in exhaust gas emitted from an engine, which consists of: a DC power supply; a circuit for detecting an electromotive force; 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. The first partition member consists of a solid electrolyte permeable to oxygen ions; a gas dispersion device operatively associated with the solid electrolyte for communicating the gas to the solid electrolyte; first and second pairs of spaced apart gas-permeable thin-film electrodes separately mounted on opposite sides of the solid electrolyte. The first pair of electrodes is connected to the circuit for detecting an electromotive force and the second pair of electrodes is connected to the DC power supply.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Toyota
• Patent Number(s): US 4570479
• OSTI ID: 6069451
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CURRENTS
DENSITY
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRODES
ELECTROLYTES
ELECTROMOTIVE FORCE
ENGINES
EXHAUST GASES
FLUIDS
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
MEASURING METHODS
METERS
OXYGEN METERS
PERMEABILITY
PHYSICAL PROPERTIES
SOLID ELECTROLYTES
WASTES