The present disclosure relates to an oil return valve for a crankcase ventilation system of an internal combustion engine, in particular a hydrostatic oil return valve.
Oil return valves of this type are known from DE 202007011585 U1.
A further method for feeding back oil deposited in the exhaust filter of a pump into the oil container of a pump is provided in DE 1403999 A1.
A check valve for an oil circuit in the crankcase ventilation is shown in DE 102013212104 A1.
The return oil of the oil separated by the oil separator generally requires a valve core to prevent blow-by gas from the inside of the crankcase from entering the return line. This valve mechanism may be structurally implemented with the aid of a line profile designed as a siphon at the end of the return line, ball check valves or diaphragm valves, and other specific embodiments. The above-mentioned variants have the following disadvantages with regard to the novel approach:
Line end including a siphon: to implement the siphon, in known approaches a U-shaped line end is used or the downspout ends in a pot-shaped container. The known specific embodiments require a relatively large amount of space inside the crankcase.
Ball check valve: it is possible that the ball jams due to sooting.
Diaphragm valve: the diaphragm made of elastomer is sensitive to high oil temperatures and aggressive media in the oil. The risk of damaging the diaphragm when inserting the valve body and when installing the valve in the crankcase is high. The seat of the diaphragm furthermore requires a high quality surface, thus resulting in increased costs.
The disadvantage here is that the above-described variants are bulky and expensive.
It is an object of the present disclosure to provide an oil return valve for a crankcase ventilation system that represents a variant for an internal combustion engine that is optimized in terms of installation space and is cost-effective.
The present disclosure provides an oil return valve for a crankcase ventilation system of an internal combustion engine that is essentially situated in the crankcase, including a valve cylinder and at least one valve pipe. The novel approach provides a hydrostatic oil return valve including corresponding installation and functional bores that are inserted into the crankcase (KG), the cylinder crankcase, the cylinder head and/or other components, it being advantageous in this case that it may be implemented cost-effectively and in an optimized manner in terms of installation space.
Further advantageous embodiments of the present disclosure may be derived from the description of the drawing, in which the exemplary embodiments illustrated in the figures are described in greater detail.
The principle here is the siphon principle (see
The special characteristic of the novel approach is initially the simple manner, in which the first chamber and the second chamber are structurally formed. Here, it is differentiated in the following between a standing arrangement of the valve core and a suspended arrangement.
The particularly simple installation of the valve core according to
Number | Date | Country | Kind |
---|---|---|---|
102019004377.4 | Jun 2019 | DE | national |
Filing Document | Filing Date | Country | Kind |
---|---|---|---|
PCT/EP2020/000095 | 5/13/2020 | WO |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2020/253979 | 12/24/2020 | WO | A |
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11280233 | Isoshima | Mar 2022 | B2 |
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20170362975 | Konishi | Dec 2017 | A1 |
Number | Date | Country |
---|---|---|
202900372 | Apr 2013 | CN |
205532772 | Aug 2016 | CN |
1403999 | Nov 1968 | DE |
3938919 | Dec 1990 | DE |
4420066 | Jul 1995 | DE |
19632931 | Feb 1998 | DE |
202007011585 | Oct 2007 | DE |
102006029681 | Jan 2008 | DE |
102010027783 | Oct 2011 | DE |
102011008537 | Jul 2012 | DE |
102013212104 | Jan 2015 | DE |
102013012786 | Feb 2015 | DE |
3009620 | Apr 2016 | EP |
2868468 | Oct 2005 | FR |
1135037 | Nov 1968 | GB |
H09236054 | Sep 1997 | JP |
2000-087720 | Mar 2000 | JP |
2001234725 | Aug 2001 | JP |
2009-293499 | Dec 2009 | JP |
Entry |
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International Search Report for PCT/EP2020/000084, dated Aug. 11, 2020. |
Number | Date | Country | |
---|---|---|---|
20220397046 A1 | Dec 2022 | US |