Devices and metal-sealed connection assemblies for fuel injection equipment

Abstract

The invention relates to a metal-tight connection assembly (4). The arrangement of the fuel injection system has a fuel-conducting part ( 2 ) and a connecting piece ( 3 ). The connection assembly includes a first metal connection counterpart (6) and a metal second connection counterpart (5). The metallic connection partners ( 5 , 6 ) can be connected to each other about the axis ( 12 ), wherein a conical sealing surface ( 15 ) is formed on the first connection partner ( 6 ), wherein at the A sealing contour ( 19 ) associated with the conical sealing surface ( 15 ) of the first connection partner ( 6 ) is formed on the second connection partner ( 5 ). The sealing contour (19) of the second connection partner (5) in the initial state has a bead (18) running around the axis (12), said bead facing the first connection partner (6 ) of the conical sealing surface (15), wherein the sealing profile (19) of the second connection partner (5) is configured such that between the first connection partner (6) and the When the second connection partner (5) is tightened, the surrounding bulge (18) of the second connection partner (5) is at least partially plastically deformed so that the first connection partner (6) A metallic seal is formed between the conical sealing surface (15) of the second connection partner (5) and the protrusion (18) of the second connection partner (5), which is at least partially deformed in the screwed-on state.

Description

technical field [0001] The invention relates to a metal-tight connection assembly and to an arrangement of a fuel injection system having the metal-tight connection assembly. The invention relates in particular to the field of fuel injection systems for internal combustion engines. Background technique [0002] A rail arrangement for a fuel injection system is known from DE 10 2008 035 492 A1. The rail assembly is used in particular for an internal combustion engine of a motor vehicle. In this case, a supply line is provided for conveying and supplying fuel under pressure, and a plurality of branches fastened to the supply line are provided for fluidly connecting the supply line to a fuel injector in each case. Furthermore, at its axial end, the supply pipe has an inner contour, into which the pressure sensor connection is plugged, which is conical in shape complementary to the outer contour of the use section. Here too, the conical inner contour with an outwardly widenin...

AI Technical Summary

Problems solved by technology

[0003] The rail assembly known from DE 10 2008 035 492 A1 and the connection provided here by means of an axial press-in configuration have the disadvantage that the pretensioning forces occurring on the connection are not determined to a large extent

However, the problem arises here that due to torque-controlled assembly large deviations in the behavior of the sealing position can occur due to various influences

This is particularly disadvantageous, because in order to ensure minimum deformation or preload force, a very large safety factor must be applied when designing the connection partner

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