Fluid sprinkling – spraying – and diffusing – Including valve means in flow line – Reciprocating
Patent
1998-11-05
2000-02-22
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Including valve means in flow line
Reciprocating
239900, 25112915, B05B 130
Patent
active
060270497
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND INFORMATION
U.S. Pat. No. 5,156,124 describes a fuel injection valve that is electromagnetically actuatable. For this purpose, the fuel injection valve has the usual components of an electromagnetic circuit, such as a magnet coil, an internal pole, and an external pole. This known injection valve is a so-called side-feed injection valve, in which fuel delivery is accomplished largely below the magnetic circuit. Proceeding from the magnet coil, contact pins project out from the fuel injection valve; these have plastic insert-molded around them over a certain length, and are embedded therein. The insert-molded plastic is applied at one end of the fuel injection valve and does not constitute an independent component of the injection valve. The same applies for the fuel injection valve described in German Patent Application No. 34 39 672. In this German Application, contact pins proceeding from the magnet coil project to an electrical connector plug which is made from plastic and partially surrounds the contact pins behind the magnet coil. The insert-molded plastic constituting the connector plug is molded onto the metal valve housing.
European Patent Application No. 0 690 224 describes a fuel injection valve which possesses a nozzle opening that, with the valve in the installed state, is already located in the interior of an intake conduit, so that spray discharge can be accomplished in largely direct fashion onto an intake valve of an internal combustion engine, avoiding any wall wetting. Corresponding spray directions can be achieved by the fact that the nozzle opening of the injection valve extends along an axis which has no parallelism with the axis of the injection valve. A comparable fuel injection valve is also described in German Patent Application No. 40 32 425.
SUMMARY OF THE INVENTION
The fuel injection valve according to the present invention, has the advantage that it can be easily and economically manufactured and installed. In addition, variations in the configuration of the fuel injection valve can very easily be undertaken. According to the present invention, this is achieved in that two assemblies of the fuel injection valve, a functional part and a connector part, are preassembled and adjusted separately from one another. In this context, the functional part substantially an electromagnetic circuit and a sealing valve that is constituted from a valve seat element and valve closure element. The electrical and hydraulic connections of the injection valve are provided, on the other hand, in the connector part. All the exemplary embodiments of the fuel injection valve possess the advantage of being economical to manufacture with very many variant configurations. Functional parts produced in large volumes, of substantially identical design (differences, for example, in the magnitude of the valve needle stroke or the number of turns in the magnet coil), can be connected to very many different connector parts, which differ, for example in size and shape, in the configuration of the electrical connector plug, in the embodiment of the lower end surface of the connector part, or in terms of their color, markings, labeling, or some other identification. The fundamental logistics for the manufacture of fuel injection valves are thus simplified.
The separation into two assemblies yields the advantage that all negative influences associated with the manufacture of the connector part that is largely made of plastic (high insert-molding pressures, application of heat) are kept away from the components of the functional part which perform the important valve functions. The relatively dirty insert-molding operation can advantageously be performed away from the assembly line for the functional part.
According to the present invention, the functional part, which performs all the important valve functions, can be very short. The advantageous result is simplified access to the components of the injection valve which require adjustment. The principal result is greatly shortened distances for the in
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Douglas Lisa Ann
Kashnikow Andres
Robert & Bosch GmbH
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