Air/fuel ratio detector

Patent · Tue Dec 15 04:00:00 EST 1987

OSTI ID:5313126

Ikai, T; Kamo, T

An air/fuel ratio detector is described comprising: a first element of tubular shape made of an oxygen ion permeable solid electrolyte and having one end closed and inner and outer sides formed with electrodes which are connected with a d.c. power source to form an oxygen pump; a second element of tubular shape made of an oxygen ion permeable solid electrolyte and having one end formed with gas diffusion means, inner and outer sides of the second element being formed with electrodes which are connected with a voltage source to form a limit current type oxygen sensor; and a tubular heater having a heating element therein. The first element is inserted into the second element such that a first space is formed between an outer side of the first element and an inner side of the second element. The second element is inserted into the tubular heater such that a second space is formed between the outer side of the second element and the inner side of the tubular heater. One end of the second element and an end of the tubular heater include means to seal the second space.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Tokyo
• Patent Number(s): US 4712419
• OSTI ID: 5313126
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
DESIGN
ELECTROLYTES
ELECTRONIC EQUIPMENT
ENGINES
EQUIPMENT
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
HEATERS
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
METERS
MONITORING
MONITORS
POWER SUPPLIES
SOLID ELECTROLYTES