Hydraulic coupling

摘要

A hydraulic coupling is specified, particularly for fuel injectors, which has a housing pot having a pot bottom and a lateral pot surface, a piston guided axially displaceably in the housing pot, a fluid-filled coupling gap that is provided between the piston and the pot bottom, diaphragm situated on the outer side of the housing pot facing away from the piston, a compensation chamber that is bordered by the diaphragm and flow-connected to the coupling gap, and a spring element acting upon the diaphragm with an axially directed spring force. In order to achieve a low overall stiffness of the hydraulic coupling at the required specified coupling force, the spring element is developed as a spring bracket fixed to the housing pot, which lies against the diaphragm with axial prestressing in the region of the pot bottom.

主权项

1. A hydraulic coupling for fuel injectors, comprising:
a housing pot having a pot bottom and a lateral pot surface, a piston guided axially displaceably in the housing pot, a fluid-filled coupling gap that is present between the piston and the pot bottom, a diaphragm situated on an outer side of the housing pot facing away from the piston, which diaphragm borders a compensation chamber that is flow-connected to the coupling gap, and a spring element acting, using an axially directed spring force, upon the diaphragm, wherein the spring element is adapted as a spring bracket fixed to the housing pot, the spring bracket presses against the diaphragm in a region of the pot bottom, and the spring bracket is axially prestressed; and wherein the spring bracket has spring legs overlapping the lateral pot surface, and a spring bridge that connects the spring legs to each other, which lies against the diaphragm using a central region.