CN111980773A - Hydraulic support element without pressure oil port - Google Patents
Hydraulic support element without pressure oil port Download PDFInfo
- Publication number
- CN111980773A CN111980773A CN202010401282.1A CN202010401282A CN111980773A CN 111980773 A CN111980773 A CN 111980773A CN 202010401282 A CN202010401282 A CN 202010401282A CN 111980773 A CN111980773 A CN 111980773A
- Authority
- CN
- China
- Prior art keywords
- housing
- support element
- oil
- pressure piston
- cylinder head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003921 oil Substances 0.000 claims abstract description 36
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 9
- 239000003595 mist Substances 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L2001/2433—Self contained, e.g. sealed hydraulic lash adjusters
Abstract
A hydraulic support element (3) without pressure oil ports, a pressure piston (6) being inserted in a bore (4) of a housing (5) of the support element, said pressure piston extending with a top (7) from an edge (8) of the housing and from an interface (9) of a cylinder head (2) facing away from the combustion chamber, a high-pressure chamber (12) for hydraulic oil being present axially below a bottom (10) of the pressure piston between said pressure piston and the housing bottom (11), said high-pressure chamber being supplied by an oil reservoir (15) via a non-return valve (14) applied to a wall region (13) of the high-pressure chamber, the housing being placed directly by its outer side (16) in a receptacle (1) of the cylinder head, the oil reservoir (15) being a separate collection bore for oil/oil spray which is laterally offset from the receptacle and which starts from the interface of the cylinder head, the collection bore being connected to a path (17) for hydraulic oil on the outer side of the housing which leads to, the path begins with an annular constriction (18) on the outside of the housing adjacent the base of the housing.
Description
Technical Field
The invention relates to a hydraulic support element without a pressure oil port, which is arranged in a receptacle of a cylinder head of an internal combustion engine, wherein a pressure piston which can be moved axially relative thereto is inserted into a bore of a housing of the support element, the pressure piston protruding with a top from an edge of the housing and a boundary surface of the cylinder head facing away from a combustion chamber, wherein a high-pressure chamber for hydraulic oil is present axially below a bottom of the pressure piston, which is remote from the top, between the bottom and the bottom of the housing, the high-pressure chamber being supplied by an oil reservoir via a check valve which is applied to a wall region of the high-pressure chamber.
Background
DE 102017117946B 3 is considered the closest prior art. A support element is known which is seated in a receptacle of the cylinder head and has no external pressure oil supply. The housing is surrounded by a separate sleeve with an oil reservoir.
See also DE 102016200625 a1 and unpublished DE 102018108287.8.
Disclosure of Invention
The object of the invention is to provide a hydraulic support element in a cylinder head which does not require an external pressure oil supply, which support element is inexpensive and in which air suction is reliably avoided.
According to the invention, this object is achieved by: the housing is placed directly by its outer side in a receptacle of the cylinder head, wherein the oil reservoir is a separate collecting opening laterally offset from the receptacle, starting from the separating plane of the cylinder head, for the oil/oil mist, which collecting opening is connected to a path for the hydraulic oil on the outer side of the housing, which path starts from an annular constriction on the outer side of the housing, adjacent to the bottom of the housing, to the high-pressure chamber.
The receptacle in the cylinder head for the hydraulically self-sufficient support element therefore does not have to be enlarged, since an additional "encapsulation" of the housing for providing the oil reservoir for the hydraulic oil is dispensed with. A wraparound enlargement of the receptacle would not be possible in most modern internal combustion engines of compact construction, since other head components, such as oil or gas passages, spark plug shafts, etc., would be cut away.
The support element itself likewise only needs to be slightly modified. In any case, it is basically possible to use a series of designs of the support element with an external pressure oil supply.
In the simplest case, the proposed collection opening for the oil/oil mist next to the receptacle for the support element is an additional opening which, geodetically, intersects the "lower" edge region of the support element at a great depth. Each support element therefore preferably has a collecting opening assigned to it, which can also be configured like a trough or the like. Alternatively, one collecting hole can also supply two support elements. Of course, the term "hole" should generally be understood as a recess, which may also have a different geometry than the cylindrical shape.
The protection scope of the invention also comprises the following technical scheme: wherein the collecting hole does not intersect the receptacle for the support element. The axis of the collecting opening can thus extend, for example, perpendicularly to the upper dividing plane of the cylinder head. In this case, a transverse path is provided for connecting these components.
According to the invention, the transfer of the hydraulic oil accumulated in the collecting hole into the support element is solved very simply. In this case, the housing of the preferably obliquely built support element (alternatively the obliquely introduced collecting hole or both elements are "oblique") has an annular constriction (diameter reduction) at its bottom. The hydraulic oil is thus "tapped" in the direction of the support element by the ring segment of the support element which projects with the edge region into the collecting opening. It is therefore not necessary to place the support element in alignment in its receptacle.
According to a suitable embodiment of the invention, the bottom of the collecting opening, viewed in the direction of gravity, is "deeper" than the edge region mentioned above. Thus, in this section, dirt (original impurities, abrasive dust, soot particles, etc.) from the hydraulic oil can be collected without being sucked into the support element.
Alternatively or in combination therewith: in the collecting bore, a filter element is arranged close to the upper boundary surface of the cylinder head for removing undesired oil particles. This may be a filter element or the like.
The other dependent claims relate to suitable measures for conveying the hydraulic oil from the annular constriction of the support element on the outer side to the high-pressure chamber of the support element.
In this way, according to one variant, it is provided that hydraulic oil is sucked into the high-pressure chamber via the bottom of the housing ("bottom suction"). To this end, the bottom has a surrounding ring which preferably has a plurality of crown openings which are in fluid connection with the annular constriction. The non-return valve is here applied to a central axial depression of the bottom.
According to an embodiment of this, an additional oil reservoir is provided axially below the bottom of the housing. This may be a simple recess/groove/hole which is in fluid connection with the annular constriction.
According to an alternative embodiment, the outer lateral surface of the housing, starting from the annular constriction, has at least one rising channel which is connected to the usual annular groove-bore-radial leadthrough in the housing and in the pressure piston. In this case, the radially inner passage in the pressure piston opens into a reservoir chamber of the pressure piston, in which the non-return valve is located on its bottom remote from the top.
Drawings
With respect to the drawings:
figure 1 shows a partial view of a cylinder head with a support element and a collecting hole;
fig. 2 shows a construction variant as before, but with alternatively constructed support elements;
fig. 3 shows the support element according to fig. 2 in a spatial view; and is
Fig. 4 shows a cylinder head in which one collecting hole intersects two receiving portions.
Detailed Description
Fig. 1 and 2 each disclose a section of a cylinder head 2 of an internal combustion engine, which has a receptacle 1, which is placed obliquely with respect to a separating plane 9 of the cylinder head 2 remote from the combustion chamber and in which a hydraulic support element 3, which does not require an external pressure oil supply, is placed.
A pressure piston 6, which projects with a top 7 for bearing the rocker arm from an edge 8 of the housing 5 and an interface 9 of the cylinder head 2, extends telescopically in the bore 4 of the housing 5 of the support element 3. Below the bottom 10 of the pressure piston 6 remote from the top, a high-pressure chamber 12 for hydraulic oil is situated axially between this bottom and the bottom 11 of the housing 5. According to two embodiments (fig. 1, 2), a non-return valve 14 is used in the wall region 13 of the high-pressure chamber 12, which is supplied by a separate oil reservoir 15 of the cylinder head 2, to open the high-pressure chamber.
The aforementioned oil reservoir 15 is laterally offset from the receptacle 1 for the support element 3 and, like the receptacle 1, starts from the separating plane 9 of the cylinder head 2. In this oil reservoir 15 (also referred to as a collecting bore), an oil/oil mist is accumulated which is present above the separating plane 9 in the space reserved for the (D) OHC-vehicle valve control when the internal combustion engine is running. It can be seen that: in both solutions, the receptacle 1 intersects the collecting opening 15 in the lower edge region 19 of the support element 3 between the base surface 20 and the axial section at the bottom annular constriction 18. In brief, the support element 3 therefore projects obliquely into the collection opening 15 and sucks hydraulic oil from the collection opening from a relatively deep location during operation.
As shown in fig. 1 in this case, the bottom 11 of the housing 5 of the support element 3 is stepped. The bottom has a radially outer ring 23 with crown-shaped radial through-openings 24 and a central axial recess 25 coupled radially inside to the ring 23, which central axial recess has the non-return valve 14. All elements 18, 24, 25 are part of the path 17 for conducting hydraulic oil into the high-pressure chamber 12.
Also seen in fig. 1 are: the bottom surface 20 of the housing portion 1 has a hollow 26 facing the axial recess 25. There is therefore an additional reservoir.
Fig. 2 discloses a slightly modified solution with respect to fig. 1. According to this solution, the non-return valve 14 rests on the bottom 10 of the pressure piston 6 of the support element 3, remote from the top. An axial channel 27 starting from the annular constriction 18 is shown on the outer lateral surface 16 of the housing 5 (see also fig. 3). This axial channel is guided in the direction of the head and is connected to annular groove/bore/radial passages 28, 29 in the housing 5 and the pressure piston 6. A radially inner radial passage 29 in the pressure piston 6 leads into a storage chamber 30 for hydraulic oil, which is axially enclosed by the pressure piston 6 between the top 7 and the bottom 10 of the pressure piston remote from the top. Here, the annular constriction 18, the axial channel 27 and the radial passages 28, 29 are also part of the path 17.
As can be seen from fig. 1 and 2, the bottom 21 of the collecting opening 15 is geodetically deeper than the intersection between the receptacle 1 and the collecting opening 15. In this deep region, therefore, a reservoir 22 for dirt in the hydraulic oil is formed.
In order to prevent foreign particles entrained in the hydraulic oil from being sucked into the high-pressure chamber, according to both figures, a filter element 31 (sieve) is applied at the input of the collecting opening 15.
List of reference numerals
1 accommodating part
2 Cylinder cover
3 support element
4 holes
5 casing
6 pressure piston
7 top part
8 edge
9 interface plane
10 bottom of pressure piston
11 bottom of the housing
12 high pressure chamber
13 wall region
14 check valve
15 oil reservoir, collecting hole
16 lateral surface
17 route
18 ring-shaped constriction
19 edge region
20 bottom surface
21 bottom of the collecting well
22 storage chamber
23 Ring
24 radial through part
25 axial recess
26 hollow part
27 axial channel
28 radial through part of casing
29 radial through part of pressure piston
30 storage chamber
31 Filter element
Claims (7)
1. A hydraulic support element (3) without a pressure oil port, which is arranged in a receptacle (1) of a cylinder head (2) of an internal combustion engine, wherein a pressure piston (6) which is axially movable relative thereto is inserted into a bore (4) of a housing (5) of the support element (3), said pressure piston projecting with a top (7) from an edge (8) of the housing (5) and from a boundary surface (9) of the cylinder head (2) facing away from a combustion chamber, wherein a high-pressure chamber (12) for hydraulic oil is present axially below a bottom (10) of the pressure piston (6) remote from the top between said bottom and a bottom (11) of the housing (5), said high-pressure chamber being supplied by an oil reservoir (15) via a non-return valve (14) applied to a wall region (13) of the high-pressure chamber (12), characterized in that the housing (5) is arranged directly in the receptacle (1) of the cylinder head (2) via an outer side (16) thereof, wherein the oil reservoir (15) is a separate collection opening laterally offset from the receptacle (1) from the separating surface (9) of the cylinder head (2) for the oil/oil mist, which collection opening is connected to a path (17) for hydraulic oil on the outer side (16) of the housing (5) leading to the high-pressure chamber (12), which path (17) starts from an annular constriction (18) on the outer side (16) of the housing (5) adjacent to the bottom (11) of the housing.
2. The support element according to claim 1, characterized in that at least one of the receptacles (1)/collecting bores (15) is placed obliquely with respect to the separating plane (9) of the cylinder head (2), wherein the receptacles (1) intersect the collecting bores (15) in a lower edge region (19) of the support element (3) between a base surface (20) and an axial section at the annular constriction (18).
3. The support element according to claim 2, characterized in that the bottom (21) of the collecting hole (15) is deeper than the intersection between the receptacle (1) and the collecting hole (15), so that a reservoir (22) for dirt in the hydraulic oil is formed below the intersection.
4. The support element according to any one of the preceding claims, characterized in that the base (11) of the housing (5) of the support element (3) is stepped in at least two steps and a) consists of a ring (23) placed in a radially outer edge region (19) at the annular constriction (18) with one or more crown-shaped radial penetrations (24) as a component of the path (17) and b) consists of a central axial recess (25) with the check valve (14) as another component of the path (17) coupled radially inside to the ring (23).
5. Support element according to claim 4, characterized in that the bottom surface (20) of the housing (1) has a recess (26) opposite the axial recess (25) for forming an additional oil reservoir.
6. The support element according to any one of claims 1 to 3, characterized in that the non-return valve (14) rests on a bottom (10) of the pressure piston (6) of the support element (3) remote from the top, wherein at least one axial channel (27) starting from the annular constriction (18) and forming part of the path (17) is guided in the outer lateral surface (16) of the housing (5) in the top direction and leading to an annular groove-bore-radial run-through (28, 29) in the housing (5) and the pressure piston (6) forming part of the path (17), and wherein the radial run-through (29) in the pressure piston (6) opens into a groove, bore-radial run-through (28, 29) axially enclosed by the pressure piston (6) between the top (7) and the bottom (10) remote from the top of the pressure piston, A storage chamber (30) for hydraulic oil as a further component of the path (17).
7. Support element according to any one of the preceding claims, characterized in that a filter element (31) is placed at the input of the collecting hole (15) for removing dirt entrained in the hydraulic oil [ oil/oil mist ].
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019113959.7A DE102019113959A1 (en) | 2019-05-24 | 2019-05-24 | Hydraulic support element seated in a receptacle of a cylinder head of an internal combustion engine, without pressure oil connection |
| DE102019113959.7 | 2019-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111980773A true CN111980773A (en) | 2020-11-24 |
Family
ID=73052761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010401282.1A Pending CN111980773A (en) | 2019-05-24 | 2020-05-13 | Hydraulic support element without pressure oil port |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111980773A (en) |
| DE (1) | DE102019113959A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080073608A1 (en) * | 2006-09-22 | 2008-03-27 | Donald Haefner | Hydraulic valve play compensating element |
| CN101932798A (en) * | 2008-02-13 | 2010-12-29 | 欧德克斯有限公司 | Lash adjuster |
| CN102482954A (en) * | 2009-09-08 | 2012-05-30 | 谢夫勒科技股份两合公司 | Assembly For A Valve Drive Of An Internal Combustion Engine |
| WO2017032364A1 (en) * | 2015-08-26 | 2017-03-02 | Schaeffler Technologies AG & Co. KG | Hydraulic compensating element of a valve train |
| DE102016205498A1 (en) * | 2016-04-04 | 2017-10-05 | Schaeffler Technologies AG & Co. KG | Hydraulic lash adjuster |
| DE102017117946B3 (en) * | 2017-08-08 | 2018-08-23 | Schaeffler Technologies AG & Co. KG | Hydraulic support for a valve train of an internal combustion engine |
| DE102017115097A1 (en) * | 2017-07-06 | 2019-01-10 | Schaeffler Technologies AG & Co. KG | Hydraulic support element |
-
2019
- 2019-05-24 DE DE102019113959.7A patent/DE102019113959A1/en active Pending
-
2020
- 2020-05-13 CN CN202010401282.1A patent/CN111980773A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080073608A1 (en) * | 2006-09-22 | 2008-03-27 | Donald Haefner | Hydraulic valve play compensating element |
| CN101932798A (en) * | 2008-02-13 | 2010-12-29 | 欧德克斯有限公司 | Lash adjuster |
| CN102482954A (en) * | 2009-09-08 | 2012-05-30 | 谢夫勒科技股份两合公司 | Assembly For A Valve Drive Of An Internal Combustion Engine |
| WO2017032364A1 (en) * | 2015-08-26 | 2017-03-02 | Schaeffler Technologies AG & Co. KG | Hydraulic compensating element of a valve train |
| DE102016205498A1 (en) * | 2016-04-04 | 2017-10-05 | Schaeffler Technologies AG & Co. KG | Hydraulic lash adjuster |
| DE102017115097A1 (en) * | 2017-07-06 | 2019-01-10 | Schaeffler Technologies AG & Co. KG | Hydraulic support element |
| DE102017117946B3 (en) * | 2017-08-08 | 2018-08-23 | Schaeffler Technologies AG & Co. KG | Hydraulic support for a valve train of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019113959A1 (en) | 2020-11-26 |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240320 Address after: 1st Floor, Building 2, No. 1 Antuo Road, Anting Town, Jiading District, Shanghai Applicant after: SCHAEFFLER HOLDING(CHINA) Co.,Ltd. Country or region after: China Address before: German Herzogenaurach Applicant before: SCHAEFFLER TECHNOLOGIES AG & CO. KG Country or region before: Germany |
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| TA01 | Transfer of patent application right |