Apparatus for learning control of air-fuel ratio of airfuel mixture in electronically controlled fuel injection type internal combustion engine

Patent · Tue Oct 07 00:00:00 EDT 1986

OSTI ID:5067083

Tomisawa, N

This patent describes an apparatus for learning control of an air-fuel ratio of air-fuel mixture in an electronically controlled fuel injection type internal combustion engine. The apparatus comprises means for detecting a driving state of the engine, which includes at least first detecting means for detecting a flow quantity Q of air sucked in the engine, second-detecting means for detecting a rotation speed N of the engine and third detecting means for detecting a concentration of the exhaust component so as to detect the actual air-fuel ratio lambda of the air-fuel mixture sucked in the engine based on the detected concentration of the exhaust component. A fuel injection means exists for injecting and supplying a fuel to the engine in an on-off manner in response to a driving pulse signal, basic fuel injection quantity operating means for operating a basic fuel injection quantity Tp of the fuel to be supplied to the engine based on the flow quantity Q of air sucked in the engine, which is put out by the first detecting means, and the engine rotation speed N put out by the second detecting means. The apparatus includes a random access memory means in which the learning correction coefficient ..cap alpha..o for correcting the basic fuel injection quantity Tp is pre-stored in advance according to the driving state of the engine.

• Assignee: Japan Electronic Control Systems Co., Ltd.
• Patent Number(s): US 4615319
• OSTI ID: 5067083
• Resource Relation: Patent File Date: Filed date 26 Apr 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
COMPUTERIZED CONTROL SYSTEMS
FUEL INJECTION SYSTEMS
AIR FLOW
CORRECTIONS
EXHAUST GASES
FEEDBACK
FUEL-AIR RATIO
INFORMATION RETRIEVAL
MEMORY DEVICES
MIXTURES
ROTATION
SIGNALS
VELOCITY
CONTROL SYSTEMS
DISPERSIONS
ENGINES
FLUID FLOW
FLUIDS
FUEL SYSTEMS
GAS FLOW
GASEOUS WASTES
GASES
HEAT ENGINES
MOTION
WASTES
330100* - Internal Combustion Engines