Fuel injection system

Details Fuel injection system Fuel injection system

1983-06-30

1985-10-15

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123492, 123442, 123478, F02M 5100

Patent

active

045467480

ABSTRACT:
A fuel injection system for an internal combustion engine has a fuel injector disposed in a main air passage upstream of a throttle valve. A part of air flowing through the main air passage is caused to flow through a by-pass air passage having outlet ports open to the main air passage upstream of the injection orifice of the injector. A thermal type air flow meter measures the rate of air flow through the by-pass air passage. In order to prevent whirling-up of injected fuel and resultant adhesion of the fuel to walls adjacent to the by-pass air passage outlet ports, the cross-sectional area of the main air passage adjacent to the by-pass air passage outlet ports is determined to be greater than that of the main air passage around the throttle valve when in its fully open position.

REFERENCES:
patent: 3721428 (1973-03-01), Gelo et al.
patent: 3747577 (1973-07-01), Mauch et al.
patent: 3776208 (1973-12-01), Stumpp
patent: 4303048 (1981-12-01), Nishio
patent: 4351304 (1982-09-01), Schweizer
patent: 4389996 (1983-06-01), Yaegushi et al.
patent: 4404846 (1983-09-01), Tamauchi et al.
patent: 4416241 (1983-11-01), Knapp et al.
patent: 4417558 (1983-11-01), Osuga et al.
patent: 4484551 (1974-11-01), Choma et al.

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