Air-fuel ratio control device of an internal combustion engine

Patent · Tue Jul 27 04:00:00 EDT 1982

OSTI ID:6716100

Hagino, I; Ishikawa, N; Obata, H; Onaka, H; Tanahashi, T; Tate, T

An air-fuel ratio control device of an internal combustion engine having a carburetor. An air bleed passage is connected to a fuel outflow passage of the carburetor, and an electromagnetic control valve is arranged in the air bleed passage. The control valve is controlled by the detecting signal of an oxygen concentration detector arranged in the exhaust passage so that the air-fuel ratio of a mixture fed into the cylinder of an engine becomes equal to the stoichiometric air-fuel ratio. After the completion of the warm-up of an engine, the opening area of the control valve is maintained within a fixed range. Before the completion of the warm-up of an engine, the opening degree of the control valve becomes larger than the above-mentioned fixed range.

• Assignee: Toyota Jidosha Kogyo K K (Japan)
• Patent Number(s): US 4341190
• OSTI ID: 6716100
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CARBURETORS
COMPARATOR CIRCUITS
CONTROL EQUIPMENT
DESIGN
DETECTION
ELECTRONIC CIRCUITS
ELEMENTS
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NONMETALS
OPERATION
OXYGEN
POLLUTION CONTROL EQUIPMENT
VALVES