Air supply system preventing backflow

Details Air supply system preventing backflow Air supply system preventing backflow

1995-02-27

1996-04-23

Kamen, Noah P.

Internal-combustion engines

Charge forming device

Auxiliary air or oxygen added to combustible mixture

123586, 123587, 123531, F02B 2300

Patent

active

055093973

ABSTRACT:
A fuel injection system for an internal combustion engine having an air supply passage for supplying air to a point close to the fuel injection hole of a fuel injector to realize good atomization of the injected fuel. The system comprises an air supply passage, a control valve arranged therein, an opening passage for opening the air supply passage downstream of said control valve into the atmosphere, and a normally closed valve arranged therein. The normally closed valve is opened when an increased amount of pressure for a predetermined period in the intake passage downstream of the throttle valve becomes larger than a predetermined value. Accordingly, the pressure in the air supply passage does not become lower than that in the intake passage downstream of the throttle valve so that a back-flow of intake air can be prevented.

REFERENCES:
patent: 5172674 (1992-12-01), Horie et al.

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