Air/fuel ratio feedback control system adapted to obtain stable

Details Air/fuel ratio feedback control system adapted to obtain stable Air/fuel ratio feedback control system adapted to obtain stable

1983-05-06

1985-02-12

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

F02M 5100

Patent

active

044984456

ABSTRACT:
An air/fuel ratio feedback control system adapted to control the air/fuel ratio of an air/fuel mixture being supplied to an internal combustion engine, by the use of a coefficient having a value variable in response to actual exhaust gas concentration. The system is operable to calculate the mean value of values of the aforesaid coefficient for each of a plurality of subregions of the feedback control region when the engine is operating in such subregion. When the engine is operating in one of a plurality of particular operating regions other than the feedback control region, control of the air/fuel ratio is effected by the use of one of such mean values, selected from among the mean values so calculated for each of such particular operating regions, in place of the aforementioned coefficient.

REFERENCES:
patent: 4391256 (1983-07-01), Sawada et al.
patent: 4397279 (1983-08-01), Iida
patent: 4445482 (1984-05-01), Hasegawa et al.

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