Fuel supply control method for internal combustion engines at op

Details Fuel supply control method for internal combustion engines at op Fuel supply control method for internal combustion engines at op

1987-05-18

1988-06-21

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123491, 123489, F02M 700, F02D 502

Patent

active

047519096

ABSTRACT:
A fuel supply control method for controlling the quanity of fuel being supplied to an internal combustion engine, in a feedback manner responsive to the output of a means for detecting the concentration of an ingredient in exhaust gases emitted from the engine. When the engine is operating in a predetermined low speed operating region wherein the rotational speed of the engine is lower than a predetermined speed higher than the idling speed and the intake pipe absolute pressure is higher than a predetermined value higher than a value normally assumed at idle of the engine, the above feedback control is interrupted and the fuel quantity is increased by a predetermined amount so as to make the air/fuel ratio of a mixture being supplied to the engine richer than a theoretical mixture ratio. Preferably, the above predetermined speed and predetermined intake pipe absolute pressure applied for determination of the operating condition of the engine in the predetermined low speed operating region are each set to different values between when the operation of the engine enters the predetermined low speed operating region and when it leaves the same region.

REFERENCES:
patent: 4201161 (1980-05-01), Sasayaura et al.
patent: 4348727 (1982-09-01), Kobayashi et al.
patent: 4389997 (1983-06-01), Nakanu et al.
patent: 4393842 (1983-07-01), Oteuka et al.
patent: 4399792 (1983-08-01), Oteuka et al.
patent: 4401087 (1983-08-01), Ikaura
patent: 4413602 (1983-11-01), Inoue et al.

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