Water Delivery Module

Abstract

A water-conveying module for injecting water into a combustion chamber of an internal combustion engine, having a conveying unit, which has a pump for conveying the water from a tank. The water can be conveyed by the pump to an injection point along a dosing line. The conveying unit has a water outlet through which water is conveyed out of the conveying unit. The water outlet is formed by a connection plug onto which the dosing line can be plugged, Water can be conveyed from the conveying unit into the dosing line along the connection plug that has a section which can be flowed through by the water and which is part of the fluid line from the conveying unit to the dosing line.

Claims

1.-8. (canceled)

9. A water-conveying module configured to inject water into or upstream of a combustion chamber of an internal combustion engine, comprising: a conveying unit, comprising: a pump configured to convey the water from a tank to an injection point along a dosing line; and a water outlet through which water can be conveyed out of the conveying unit, wherein the water outlet is a connection plug onto which the dosing line can be plugged, wherein water can be conveyed from the conveying unit into the dosing line along the connection plug, wherein the connection plug has a through-flowable section which can be flowed through by the water and which is part of a fluid line from the conveying unit to the dosing line.

10. The water-conveying module as claimed in claim 9, wherein the through-flowable section has a cross section that varies along a throughflow direction.

11. The water-conveying module as claimed in claim 10, wherein the through-flowable cross section of the through-flowable cross section narrows from the dosing line toward the conveying unit.

12. The water-conveying module as claimed in claim 10, wherein the through-flowable section has, in a flow direction from the conveying unit toward the dosing line, a line cross section that repeatedly narrows and increases again.

13. The water-conveying module as claimed in claim 10, wherein the through-flowable section has a sawtooth-like contour in a longitudinal section.

14. The water-conveying module as claimed in claim 10, wherein the through-flowable section has a contour that increases a flow resistance more greatly in a flow direction from the dosing line toward the conveying unit than along a flow direction from the conveying unit toward the dosing line.

15. The water-conveying module as claimed in claim 10, wherein the through-flowable section forms a filter element for fluid which can flow through the through-flowable section, the filter element formed by serrated pockets at a wall which outwardly delimits the through-flowable section.

16. The water-conveying module as claimed in claim 10, wherein a minimum line cross section of the through-flowable section is smaller than a line cross section on a side of the conveying unit and is smaller than a line cross section of the dosing line.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The invention will be discussed in detail below on the basis of exemplary embodiments with reference to the drawings. In the drawings:

[0027] FIG. 1 is a perspective view of the assembly formed by the conveying unit, the filter and the control electronics, wherein in particular the forwardly projecting connection plug can be seen; and

[0028] FIG. 2 is a view of a longitudinal section through the connection plug, wherein in particular the through-flowable section of the connection plug is shown.

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS

[0029] FIG. 1 shows an assembly 1 of the water-conveying module, which assembly has a conveying unit, a filter element, control electronics, and electrical connections. For example, a tank into which the assembly shown can be inserted is not shown. The connection plug 2 is arranged downstream of the conveying unit in the main conveying direction. The connection plug 2 is formed as an injection-molded part from a plastic with the base assembly of the assembly 1 and projects therefrom.

[0030] A dosing line (not shown) can be plugged onto the connection plug 2 and connected to the connection plug. The connection plug 2 has a smooth outer surface, over which the dosing line can be pushed. Within the connection plug 2, there is formed a through-flowable section, which can be flowed through by the water conveyed from the conveying unit.

[0031] FIG. 2 shows a longitudinal section through the connection plug 2. In FIGS. 1 and 2, the arrow 3 indicates the water flow direction along which a water flow can arise as a consequence of freezing of the water in or on the connection plug. This is opposite to the normal conveying direction.

[0032] In FIG. 2, the configuration of the inner wall of the connection plug 2 can be seen. The line cross section varies along the extent of the connection plug. The inner wall has a serrated contour, whereby a sawtooth-like structure is created. As viewed along the main conveying direction, the line cross section decreases by way of a sloping flank 4 before the line cross section increases again along the flank 5 which is perpendicular to the outer wall. This profile is repeated four times by way of example in the illustration in FIG. 2.

[0033] The minimum line cross section 6 is smaller than the line cross section of the outlet channel or of the dosing line, neither of which is illustrated in FIG. 2.

[0034] In particular as viewed along the arrow 3, the inner contour of the connection plug constitutes a mechanical filter which, in particular by way of the perpendicular flanks 5 projecting steeply into the through-flowable cross section, can mechanically block solids situated in the water, such as for example ice. The lining-up of said sawtooth-like structures allows the filter path to be lengthened or shortened as desired. A decrease in the minimum line cross section 6 from one sawtooth-like structure to the next is also advantageous, this making it possible for the pressure loss generated by way of the connection plug or the inner structure of the connection plug to also be additionally influenced, whereby the filtering action is further improved.

[0035] The different features of the individual exemplary embodiments can also be combined with one another.

[0036] The exemplary embodiments in FIGS. 1 and 2 are in particular not of a limiting nature and serve for illustrating the concept of the invention.

[0037] Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto