Fuel control system for automobile engine

Details Fuel control system for automobile engine Fuel control system for automobile engine

1990-07-09

1991-07-23

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, F02M 5100

Patent

active

050334360

ABSTRACT:
A fuel control system for an internal combustion engine of an automotive vehicle controls an air-fuel ratio using feedback so as to determine a proper air-fuel ratio by constantly monitoring the exhaust to verify the accuracy of an air-fuel mixture setting. The fuel control system halts the feedback fuel control and forcibly causes an increase of fuel so as to enrich an air-fuel mixture setting when an engine operating condition shifts into a specific zone of engine load in which the engine operates at high loads. The forced increase of fuel is delayed for a predetermined time period when the engine operates at speeds within a specific speed zone in the specific load zone, the time period being changed so as to be longer or shorter according to engine speeds in the specific speed zone.

REFERENCES:
patent: 4488529 (1984-12-01), Nishida et al.
patent: 4561403 (1985-12-01), Oyama et al.
patent: 4763629 (1988-08-01), Okazaki et al.
patent: 4877006 (1989-10-01), Norton et al.
patent: 4913120 (1990-04-01), Fujimoto et al.
patent: 4936278 (1990-06-01), Umeda

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