Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – And valving means controlling flow for combining
Patent
1991-10-09
1993-05-04
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
And valving means controlling flow for combining
2394173, 239434, 23953312, 123531, 123585, B05B 712, F02M 6116
Patent
active
052073831
DESCRIPTION:
BRIEF SUMMARY
STATE OF THE ART
The invention is based on a device for injecting a fuel/air mixture. A device is already known for injecting a fuel/air mixture (DE-Offenlegungsschrift 3,240,554); this involves an injection valve with a gas guidance sleeve, the injection valve opening being surrounded in its immediate vicinity by a gas annular gap connected to a gas annular duct, on the gas guidance sleeve. It is only possible to match the gas annular gap to the requirements of the internal combustion engine and the different types of injection valves by displacing or bending the gas guidance sleeve; this involves great complexity so that the manufacture of this known device by mass production causes large costs due to the optimisation of the gas annular gap.
ADVANTAGES OF THE INVENTION
The device, according to the invention, for injecting a fuel/air mixture has, in contrast, an advantage that an envelope of air can be produced on a fuel injection valve in a simple manner and at favourable cost without adjustment of the gas annular gap being necessary during assembly because this gas annular gap is fixed by selecting an air envelope bush which is designed to suit the particular requirements. The use of different air envelope bushes permits the air quantity to be matched to the particular requirements of the internal combustion engine without any further adjustment being necessary.
Exact maintenance of the defined air gap is ensured, without an adjustment procedure, exclusively by directly supporting the air envelope bush on the injection end of the fuel injection valve. The small height of the air gap ensures that the induction air is accelerated to approximately sonic velocity and the fuel sprayed from the fuel spray openings is therefore finely atomised.
The simple construction of the air envelope bush, in association with different fuel injection valves, leads to favourable manufacturing costs.
Advantageous extensions and improvements to the device are possible by means of the measures set forth hereinafter.
It is particularly advantageous for the mixture spray opening to expand a funnel shape away from the injection end so that fuel emerging from the fuel injection opening cannot wet the mixture spray opening wall even in the case of erroneous air preparation.
It is also advantageous for at least one air supply opening to be formed in the cylindrical part of the air envelope bush, this air supply opening permitting a radial air supply, for example from an air duct formed in the induction pipe of the internal combustion engine, in the direction of the annular surface of the bottom part.
The formation of a defined air gap between the annular surface and the injection end requires an accurately maintained location between the fuel injection valve and the air envelope bush. For this reason, it is advantageous for the stop surfaces to be formed by an external, interrupted annular protrusion of the bottom part, which annular protrusion, because of the numerous stop surfaces protruding by a predetermined distance above the annular surface, not only permits exact contact between the air envelope bush and the fuel injection valve but also permits a reliable air supply to the annular surface by means of the recesses formed in the interrupted annular protrusion.
So that the air gap formed between the annular surface of the air envelope bush and the injection end of the fuel injection valve can be modified in a simple manner and at favourable cost for different cylinders of an internal combustion engine with externally induced ignition or even internal combustion engines, it is advantageous for at least one distance piece to be arranged between the injection end and the contact surfaces of the air envelope bush.
It is also advantageous for the annular surface to be formed by an inner annular protrusion which has a predetermined axial distance from the injection end and thus permits the simple formation of a narrow air gap.
In order to even out the air supply to the air gap and to avoid disturbing turbulence, it is advantageou
REFERENCES:
patent: 3272441 (1966-09-01), Davis, Sr. et al.
patent: 3656693 (1972-04-01), Eckert
patent: 4434766 (1984-03-01), Matsuoka et al.
patent: 4519370 (1985-05-01), Iwata
patent: 4545354 (1985-10-01), Jaggle et al.
patent: 4566634 (1986-01-01), Wiegand
patent: 4957241 (1990-09-01), Roger
patent: 4982716 (1991-01-01), Takeda et al.
patent: 5035358 (1991-07-01), Katsuno et al.
Hans Waldemar
Kirsche Ingo
Greigg Edwin E.
Greigg Ronald E.
Kashnikow Andres
Robert & Bosch GmbH
Trainor Christopher G.
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