Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Patent
1990-03-01
1991-01-22
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
23953312, F02M 6118, F02M 5108
Patent
active
049864785
DESCRIPTION:
BRIEF SUMMARY
The invention is directed to an injection valve for injecting fuel into an intake line of an internal combustion engine, wherein the valve includes a valve body that has an annular valve seat at the inside of the injection valve that is concentric with a principle axis, has a closing part that is arranged displaceable along the principle axis, that is pressed against the valve seat by a spring and that is lifted off from valve seat with an electro magnet. A cylindrical line or conduit bore that penetrates the valve body from inside the valve seat from inside to outside and that discharges at the outside into a nozzle opening is also provided. For example, German published application No. 34 11 337 discloses such an injection valve. The fuel is thereby conducted via fuel delivery bores to a concentrating bore that has a significantly larger diameter and volume than the fuel delivery bores. The fuel should thereby emerge from the fuel delivery bores without wall contact and should subsequently impact onto the wall of the concentrating bore in order to flow to the end of the concentrating bore over this distributed film-shaped in roughly the shape of a parabola. A further concentrating bore following thereupon is executed such that its diameter diminishes to form an ejection section. The ejection section also has teeth directed toward the ejection end.
This embodiment is intended to avoid the formation of larger droplets of fuel, so that the fuel ejection ensues uniformly.
Further, German published application No. 34 15 905 discloses an apertured nozzle for internal combustion engines. The nozzle bore having a cylindrical shape is provided with a surface at a distance from its region at the intake side, this surface deviating from the cylindrical shape and acting as a disturbance for the fuel jet to be sprayed in order to thereby achieve a reduction of the combustion noises.
In comparison thereto, the object of the invention is to fashion an injection valve such that the quantity of ejected fuel evaporates better and faster.
The inventive solution of this object is achieved by an injection valve of the type first described above which has a closing part that is flat, a line or conduit that is cylindrical and has a constant diameter, and a nozzle opening that is formed by a central opening and by peripheral openings that surround the central opening, expand toward the outside, and are separated from one another by guide tabs. The peripheral openings and the guide tabs lie in an annular zone that is arranged between the central opening and the end of the line or conduit and that describes an acute angle of inclination of less than 90.degree. with the principle axis. It is based on a special design of the nozzle opening on the basis whereof one succeeds in lending the ejected fuel jet a highly articulated and, thus, extremely large surface that promotes the evaporation of the fuel.
Advantage developments of the invention are achieved in an injection valve in which the guide tabs occupy at least a 30% of the area of the annular zone. Such injection valve preferably has the nozzle opening lying co-axially with the principle axis. In such injection valve, every peripheral opening is symmetrical relative to a secondary axis and the secondary axes of all peripheral openings proceed from the principle axis and have the same angular spacing from one another. Such angular spacing is of about 120.degree. and there are three such peripheral openings. Another feature of the injection valve is that the end of every peripheral opening is limited by a semi-circular end wall or piece. In such injection valve to, lateral edges lying opposite one another proceed between the end wall of every peripheral opening and the central opening. Such injection valve has the lateral edges proceeding straight and two lateral edges of neighboring peripheral openings intersecting in a point on the circular central opening.
An alternate injection valve has the lateral edges as circular arches and the lateral edges of neighboring peripheral open
REFERENCES:
patent: 4099494 (1978-07-01), Goloff et al.
patent: 4339082 (1982-07-01), Radaelli et al.
patent: 4666088 (1987-05-01), Krauss et al.
Kashnikow Andres
Morris Lesley
Siemens Aktiengesellschaft
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