Method and apparatus for controlling air-fuel ratio in internal combustion engine

Patent · Tue May 26 04:00:00 EDT 1987

OSTI ID:6423623

Kinugasa, Y

A method is described for controlling the air-fuel ratio in an internal combustion engine comprising the steps of: calculating a base fuel amount in accordance with predetermined engine operating parameters; determining whether or not the engine is in an acceleration state; calculating an air-fuel ratio deviation from the optimum air-fuel ratio when the engine is in an acceleration state; and calculating a synchronous fuel amount in accordance with the base fuel amount. An apparatus is described for controlling the air-fuel ratio in an internal combustion engine comprising: means for calculating a base fuel amount in accordance with predetermined engine operating parameters; means for determining whether or not the engine is in an acceleration state; means for calculating an air-fuel ratio deviation from the optimum air-fuel ratio when the engine is in an accelration state; and means for calculating a synchronous fuel amount in accordance with the base fuel amount.

• Assignee: Toyota Jidosha Kabushiki Kaisha, Aichi
• Patent Number(s): US 4667631
• OSTI ID: 6423623
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ACCELERATION
COMPUTER CALCULATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ENGINES
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPTIMIZATION
SYNCHRONIZATION
VEHICLES