Air-fuel ratio control system in internal combustion engine

Details Air-fuel ratio control system in internal combustion engine Air-fuel ratio control system in internal combustion engine

1979-08-03

1980-12-23

Cox, Ronald B.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02B 300

Patent

active

042403901

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine which includes a carburetor in which the air-fuel ratio is set on the lean side rather than at a controlled air-fuel ratio. Fuel injection valves are provided for injecting additional fuel so that the air-fuel ratio is controlled to a correct value. A control circuit is provided for basically controlling the fuel injection rate in accordance with the RPM of the engine and the air intake pressure. The control circuit also corrects and controls the fuel injection rate in accordance with transient operating conditions of the engine.

REFERENCES:
patent: 4169441 (1979-10-01), Hirano

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