Solenoid valve with multiple-part armature without armature guide

Abstract

The invention relates to a solenoid valve (16, 36) for actuating a fuel injector (10). The latter comprises a valve piece (14), in which a control chamber (86) is formed. Its outlet (82) can be opened or closed by way of a closing element (22) which can be actuated via the solenoid valve (16, 36). An armature plate (18) is received in a hydraulically damped manner (72, 56, 73) on an armature pin (20) which has a central outlet (62).

Description

Background technique [0001] DE 196 50 865 A1 describes a solenoid valve for controlling the fuel pressure in a control chamber of an injection valve of, for example, a common rail injection system. The stroke movement of the valve piston is controlled by the fuel pressure in the control chamber, and the injection orifice of the injection valve is opened or closed by the valve piston. The solenoid valve comprises an electromagnet, a moving armature and a valve element which moves with the armature and is loaded in the closing direction by the valve closing spring, which cooperates with the valve seat of the solenoid valve and thereby controls the flow from the control chamber. fuel drain. [0002] In the known solenoid valves, vibrations of the armature and / or bounce of the valve part that occur during operation have a disadvantageous effect. According to the solutions of DE 196 50 865 A1 and DE 195 08 104 A1, the armature of the solenoid valve is constructed as a two-part so...

AI Technical Summary

Problems solved by technology

The disadvantage is that the number of components to be assembled increases and therefore the tolerance chain increases

In order to adjust a given stroke, the tolerances of the elements to be connected (cooperating pin, armature pin and armature plate and receiving hole for cooperating pin) have to be kept very narrow, and moreover result in a very laborious assembly

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