This application is the U.S. National Phase Application of PCT International Application No. PCT/EP2017/072148, filed Sep. 5, 2017, which claims priority to German Patent Application No. 10 2017 209 582.2, filed Jun. 7, 2017, and German Patent Application No. 10 2016 218 330.3, filed Sep. 23, 2016, the contents of such applications being incorporated by reference herein.
The invention relates to an electromagnetic valve, in particular for slip-controlled motor vehicle brake systems.
DE 10 2012 206 282 A1, incorporated herein by reference, has already disclosed an electromagnetic valve of the stated type, having a valve closing element which is arranged in a valve housing and which is capable of opening or closing a valve passage in the valve housing, having a magnet armature for actuating the valve closing element, which is designed to be relatively movable within the range of a defined working stroke, having a restoring spring which acts on the magnet armature, and having a preferably block-shaped valve carrier in whose valve holding bore the valve housing and a filter element are introduced, the latter establishing along the shortest route a hydraulic connection between an inlet duct and an outlet duct which open out into the valve holding bore. As a result of the selected direct flow guidance, undesirable flow noises can be generated.
An aspect of the invention is an inexpensive design of an electromagnetic valve of the stated type with the simplest possible functional means, and an improved electromagnetic valve such that undesirable flow noises are avoided.
Further features and advantages of aspects of the invention will emerge below from the description of several drawings.
In the drawings:
The electromagnet valve is closed in the position of no electromagnetic excitation, for which purpose the restoring spring 17, arranged above the magnet armature 16, pushes the valve closing element 14, connected to the magnet armature 16, onto the valve seat 20, whereby the valve passage 15 in the valve seat 20 is blocked.
In the present exemplary embodiment, the magnet core 18 is, as a closure plug, pressed into an austenitic housing portion of the valve housing 8, which housing portion is, as a thin-walled sleeve part, welded to a thick-walled tube body 21. It goes without saying that, if desired or required, other embodiments of the upper housing portion are also possible.
In the present exemplary embodiment, the valve housing 8 consists of the sleeve part carrying the magnet core 18, the thick-walled tube body 21, which is fixed in the valve carrier 4, and a pot-shaped sleeve 22, which is connected fixedly to the tube body 21 and which has the valve passage 15 in the pot base. The sleeve 22 preferably consists of a hardened ferritic material in order for it to be possible for the valve seat 20, which is manufactured in a deep-drawing process, to be designed to be as free from wear as possible.
As emerges clearly from
As per the electromagnetic valve according to
According to an aspect of the invention, for targeted flow diversion within the valve holding bore 3, both the inlet and outlet ducts 1, 2 are oriented transversely with respect to the valve holding bore 3 in the valve carrier 4, wherein the outlet duct 2 opens out, at a distance from the discharge of the filter element 5, into a portion of the valve holding bore 3 in which the filter element 5 has a closed sleeve portion 6.
In terms of construction, the discharge region of the filter element 5 is arranged between the closed sleeve portion 6 and the base of the valve holding bore 3, said discharge region being provided with a fine filter fabric 10. For the purpose of fixing and supporting the fine filter fabric 10, the sleeve portion 6 has multiple webs 11 or ribs in the axial direction, wherein, along the webs 11, the fine filter fabric 10 forms a lateral surface for radial discharge from the filter element 5.
Since an annular space 7 is provided between the filter element 5 and the valve holding bore 3 and extends from the base of the valve holding bore 3 to a sealing region 9 formed on the pot-shaped sleeve 22 of the valve housing 8, in the position lifted off from the valve seat 20 of the valve closing element 14, the pressure medium stream firstly passes, within the closed sleeve portion 6, to the fine filter fabric 10 in a vertically directed manner and, there, following radial discharge, impinges on the wall of the valve holding bore 3, whereby the flow is diverted vertically upward via the annular space 7 and, at the height of the sleeve portion 6, undergoes a horizontal direction reversal in the direction of the outlet duct 2. Thus, as a result of the covering of the outlet duct 2 and the dimensioning of the annular space 7, the sleeve portion 6 on the rod-shaped filter element 5 brings about a homogenization of the flow at the outlet of the electromagnetic valve with the effect that no locally occurring, very high flow speeds, which incite vibration in adjoining lines and are consequently perceived acoustically, are observed.
The filter element 5 is distinguished by a slender design which, in the region of the fine filter fabric 10, has particularly low resistance in terms of flow, wherein, as a result of its complete coverage of the outlet duct, the sleeve portion 6 situated in front of the fine filter fabric 10 reliably prevents a direct (short-circuit) hydraulic stream in the direction of the outlet duct 2.
Number | Date | Country | Kind |
---|---|---|---|
10 2016 218 330.3 | Sep 2016 | DE | national |
10 2017 209 582.2 | Jun 2017 | DE | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/EP2017/072148 | 9/5/2017 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2018/054674 | 3/29/2018 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
5005919 | Shuey | Apr 1991 | A |
5163474 | Rizk | Nov 1992 | A |
5810330 | Eith | Sep 1998 | A |
6003838 | Beck | Dec 1999 | A |
6099608 | Harms et al. | Aug 2000 | A |
6254199 | Megerle | Jul 2001 | B1 |
6318703 | Goossens | Nov 2001 | B1 |
6427972 | Kirschner | Aug 2002 | B1 |
6627077 | Fritsch | Sep 2003 | B2 |
6637724 | Mayer | Oct 2003 | B1 |
6644623 | Voss | Nov 2003 | B1 |
6659421 | Goossens | Dec 2003 | B1 |
6846049 | Obersteiner | Jan 2005 | B2 |
6846408 | Knight | Jan 2005 | B2 |
7325563 | Seko | Feb 2008 | B2 |
7341320 | Otsuka | Mar 2008 | B2 |
8127788 | Yamashita | Mar 2012 | B2 |
8132779 | Lee | Mar 2012 | B2 |
8322684 | Otsuka | Dec 2012 | B2 |
8733397 | Otsuka | May 2014 | B2 |
8985549 | Ferguson | Mar 2015 | B2 |
9016660 | Leventhal | Apr 2015 | B2 |
9038984 | Voss | May 2015 | B2 |
9090236 | Fricke-Schmidt | Jul 2015 | B2 |
9457784 | Tokoi | Oct 2016 | B2 |
20020074273 | Golovatai-Schmidt | Jun 2002 | A1 |
20020100890 | Moreno | Aug 2002 | A1 |
20030213928 | Masuda | Nov 2003 | A1 |
20040232763 | Otsuka | Nov 2004 | A1 |
20050173979 | Voss | Aug 2005 | A1 |
20090095929 | Lee | Apr 2009 | A1 |
20100059698 | Guggenmos | Mar 2010 | A1 |
20130056662 | Otsuka et al. | Mar 2013 | A1 |
20130092113 | Bohner | Apr 2013 | A1 |
20160230896 | Godbillon | Aug 2016 | A1 |
Number | Date | Country |
---|---|---|
203442288 | Feb 2014 | CN |
10046046 | Aug 2001 | DE |
10342156 | Jun 2004 | DE |
102005014100 | Feb 2006 | DE |
102005048880 | Mar 2007 | DE |
102012206282 | Nov 2012 | DE |
102011087896 | Jun 2013 | DE |
102013204973 | Sep 2014 | DE |
102013204973 | Sep 2014 | DE |
102013216568 | Feb 2015 | DE |
102014209317 | Nov 2015 | DE |
102017206639 | Oct 2018 | DE |
0108043 | May 1984 | EP |
488994 | Jul 1938 | GB |
2002521643 | Jul 2002 | JP |
101383020 | Apr 2014 | KR |
WO-2012156341 | Nov 2012 | WO |
Entry |
---|
English translation of DE 102011087896A1 (Year: 2013). |
English translation of Schulz (Year: 2012). |
Korean Notification of Reason for Refusal for Korean Application No. 10-2019-7006882, dated Mar. 31, 2020, with translation, 11 pages. |
German Search Report for German Application No. 10 2017 209 582.2, with partial trannslation, dated Feb. 8, 2018—9 pages. |
International Search Report and Written Opinion for Application No. PCT/EP2017/072148, dated Nov. 16, 2017—9 pages. |
Chinese Office Action for Chinese Application No. 201780057943.X, dated Oct. 10, 2020, 6 pages. |
Chinese Office Action for Chinese Application No. 201780057943.X, dated Jul. 14, 2021 with translation, 12 pages. |
Number | Date | Country | |
---|---|---|---|
20190256067 A1 | Aug 2019 | US |