CN110359974B - Hydraulic support element for a valve train of an internal combustion engine - Google Patents
Hydraulic support element for a valve train of an internal combustion engine Download PDFInfo
- Publication number
- CN110359974B CN110359974B CN201910265393.1A CN201910265393A CN110359974B CN 110359974 B CN110359974 B CN 110359974B CN 201910265393 A CN201910265393 A CN 201910265393A CN 110359974 B CN110359974 B CN 110359974B
- Authority
- CN
- China
- Prior art keywords
- housing
- pressure piston
- radial
- cylinder head
- support element
- 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.)
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 8
- 238000003860 storage Methods 0.000 claims abstract description 22
- 239000003595 mist Substances 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 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
-
- 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 for a valve train of an internal combustion engine, which is seated in a cylinder head receiving bore via its housing, in which a pressure piston is guided with its circumferential side, which piston projects with its head over the housing edge, in which housing circumferential side a guide line for the introduction of a hydraulic medium into a piston reservoir is provided via an oil/oil mist injection collecting channel intersecting the cylinder head upper side, which collecting channel opens out at a section of the receiving bore side arranged at a low level into a radial passage in the housing, which radial passage is in fluid connection with a radial opening in the piston leading to its reservoir, in which cylinder head upper side is flat in the receiving bore inlet region and the receiving bore is simultaneously smooth-walled, stepless; two pre-storage sections for hydraulic medium are provided, wherein a first pre-storage section is formed by the collecting channel and a second pre-storage section is formed by an annular recess in the housing bore; the first pre-storage part is connected with the second pre-storage part through the radial through part, and the second pre-storage part is connected with the piston reserve chamber through the radial opening.
Description
Technical Field
The invention relates to a hydraulic support element for a pressureless oil port of an internal combustion engine valve train, which is arranged directly in a receiving bore of a cylinder head via the outer circumferential side of the housing thereof and in which a pressure piston which is axially movable relative to the housing and which projects with its head for mounting a rocker arm beyond the edge of the housing and the upper side of the cylinder head is guided directly in the bore of the housing with its circumferential side, wherein a high-pressure chamber for a hydraulic medium, which is located axially below the bottom of the pressure piston remote from the head and between which a high-pressure chamber is located between the bottom and the housing bottom or the bottom of the receiving bore, can be supplied with hydraulic medium from a reservoir chamber enclosed by the pressure piston via a non-return valve at the bottom, wherein a guide line which leads the hydraulic medium into the reservoir chamber of the pressure piston is arranged in the outer circumferential side of the housing via a collecting channel for the injection of oil/oil mist which intersects the upper side of the cylinder head, the collecting channel opens into at least one radial passage in the housing at a section arranged at a low position on the receiving bore side, said radial passage being in fluid connection with at least one radial opening in the pressure piston leading to its storage chamber.
Background
In the course of further optimizing the pressure oil circuit of the internal combustion engine, in addition to the keywords "reduced oil pump power" and "reduced oil pump", the hydraulic support element which is no longer coupled to the pressure oil circuit of the internal combustion engine is also addressed for the rocker arm valve mechanism. After a single initial filling, such elements make good use of the oil or oil mist injected only from the air lock area above the cylinder head for their supply.
DE 102014214383 a1 already discloses a support element for a pressure-free oil connection, which is arranged in a cylinder head. For example, as shown in connection with fig. 4 and 1, the element projects with its head into a groove-shaped recess of the cylinder head. The recess serves as a reservoir. The hydraulic medium is thereby conveyed further downwards into the respective radial feed-through in the housing via two collecting channels which are arranged exactly opposite one another on the outer circumferential side of the housing of the support element.
It has turned out that, due to the recess required for each element, a significant variation at the already existing cylinder head is necessary, which in mass production can significantly increase the cost of the internal combustion engine. Furthermore, the correspondingly necessary recess would unnecessarily weaken the cylinder head and risk interference with the passage in the cylinder head. Furthermore, it can be seen (see fig. 2) that, due to the low arrangement of the radial passages in the housing and the high arrangement of the radial openings in the pressure piston, the prefilled reservoir in the pressure piston is emptied up to the lower edge of its radial opening in the illustrated position in which the pressure piston is removed from the housing (transport stop).
Another support element without external pressure oil supply is disclosed in DE 102016200625 a 1. The housing is surrounded by a separate sleeve with an oil reservoir. It is obvious that the support element has to be modified in a cost-effective manner, in particular the receiving bore of the cylinder head has to be enlarged.
Disclosure of Invention
The object of the present invention is to provide a hydraulic support element in a cylinder head that is adapted to be free of external pressure oil supply, without requiring major modifications to the existing design for this purpose.
The above object is achieved according to the invention in the following manner: the upper side of the cylinder head is flat at least in the inlet region of the receiving opening and the receiving opening is at the same time smooth-walled; two pre-storages for hydraulic medium are provided, of which a first is formed by an accumulation channel as a surrounding annular space in the outer circumferential side of the housing and a second is formed either by an annular recess in the bore of the housing or by an annular recess in the circumferential side of the pressure piston, wherein the first pre-storage is connected via a radial through-going with the second pre-storage and the second pre-storage is connected via a radial opening with a reservoir chamber in the pressure piston.
A support element for a pressure-free oil port arranged in a cylinder head is therefore provided which does not have the above-mentioned disadvantages. In this case, the hitherto used support elements can be used to the maximum extent without modification of the cylinder head. The pressure oil channel that is present in the cylinder head and that leads to the respective support element remains as a blind channel. On the basis of the two prestores on/in the support element, which are hardly changed, it is achieved that a sufficient quantity of injection oil or the like is introduced into the interior of the component and stored there in order to carry out a defined play compensation. The support member may also be mounted without changing its outer diameter, or its receiving hole in the cylinder head may remain unchanged.
According to a specific development of the invention, the pressure piston of the support element in its maximum extended position is held by a stop means, such as an inner collar/stop ring. In this case, the radial opening of the pressure piston is located below the high-level arranged radial through-opening of the housing, so that a high column of hydraulic medium in the support element is prevented from flowing out, which is important, for example, after initial filling and subsequent transport. For example, the radial through-going portion is no less than 1/4 the length of the housing, as measured from the edge of the housing.
In order to enlarge the volume of the two pre-storages, the wall area or one of the wall areas radially surrounding the two pre-storages may be designed thinner. Alternatively, it is also possible to slightly increase the diameter of the receiving bore in the vicinity of its inlet region.
Another measure for improving the accumulation of hydraulic medium in the reservoir chamber of the pressure piston is: in the pressure piston, at least one deflection opening is arranged for the radial passage of the hydraulic medium, which extends in an axial section between the bottom of the pressure piston and the radial opening. Hereby, a partial quantity of the hydraulic medium which is pressed out of the high-pressure chamber via the leakage gap between the pressure piston and the housing during the high-pressure phase is directly conducted back into the reservoir chamber via the low-level arranged deflection opening.
In the case of a two-part pressure piston, such a deflection opening can be located in the region of the mutually opposite end sides of the two axial sections and can be designed, for example, as one or more crown-shaped perforations.
Drawings
The invention is described in connection with the accompanying drawings. The sole fig. 1 shows a longitudinal section through the support element 1 without an external pressure oil supply.
Detailed Description
It can be seen that the support element 1 is seated via its outer circumferential side 2 of the pot-shaped housing 3 in a blind-hole-like and smooth-walled, stepless receiving bore 4 of the cylinder head 5. An axially movable pressure piston 7 is guided with its circumferential side 8 in a bore 6 of the housing 3. The pressure piston with its head 16, which projects beyond the edge 9 of the housing 3 and at the same time beyond the flat upper side 10 of the cylinder head 5, serves as a bearing point for the rocker arm, which bearing point is capable of a single-ended pivoting movement. The housing 3 may also terminate flush with the upper side 10 of the cylinder head 5 or be arranged slightly lower. Thus, in the case of its lower orientation, an additional oil reservoir will also be present (see below).
Axially below the bottom 11 of the pressure piston 7 remote from the head 16, a high-pressure chamber 13 for the hydraulic medium is located between this bottom 11 and the housing bottom 12. Via a non-return valve 14 at the bottom 11, the high-pressure chamber can be supplied with hydraulic medium by the pressure piston 7 under a reservoir chamber 15 enclosed by its head 16.
Only the injected oil/oil mist from the region above the upper side 10 of the cylinder head 5 is "collected" as hydraulic medium, which subsequently flows under the influence of gravity into the reservoir 15 of the pressure piston 7. For this purpose, an annular collecting duct 18 is provided as a first pre-storage section 22 in the outer circumferential side 2 of the housing 3, starting from its upper edge 9. The collecting channel 18 is connected in its lower section 19 to a radial passage 20 in the housing 3. From the radial feed-through 20 (bore) the hydraulic medium is fed further downwards into an annular second pre-storage 23 in the bore 6 of the housing 3. The second prestoring portion 23 is in turn in fluid connection with a radial opening 21 embodied as a bore in the pressure piston 7, which opens directly into the reservoir 15 of the pressure piston 7.
A push-out spring 17 is installed in the high-pressure chamber 13. The ejection spring is clamped between the bottom 11 of the pressure piston 7 and the housing bottom 12. In order to limit the displacement movement of the pressure piston 7 out of the housing 3 (transport securing device), the pressure piston 7 has a stop ring as a stop 24, which is seated in an annular groove in its circumferential side 8. In the stop position, the radial opening 21 of the pressure piston 7 is lower than the radial passage 20 in the housing 2.
The pressure piston 7 consists of two separate parts, namely an upper axial section 26 and a lower axial section 27, which sections 26, 27 are opposite each other with their end sides 28, 29. Between the end sides 28, 29, a deflection opening 25 for the hydraulic medium is arranged.
List of reference numerals
1 support element
2 peripheral side
3 case
4 receiving hole
5 Cylinder head
6 holes
7 pressure piston
8 peripheral side surface
9 edge
10 upper side
11 bottom part
12 bottom of the shell
13 high pressure chamber
14 check valve
15 reserve chamber
16 head
17 push-out spring
18 gathering channel
19 section
20 radial through-hole
21 radial opening
22 first pre-storage section
23 second prestoring section
24 stop mechanism and check ring
25 turn to the opening
26 lower axial section
27 axial section of the shaft
28 end side
29 end side
Claims (4)
1. A hydraulic support element (1) for a pressureless oil connection of a valve train of an internal combustion engine, which is arranged directly in a receiving bore (4) of a cylinder head (5) via an outer circumferential side (2) of a housing (3) thereof and which is guided with its circumferential side (8) directly in a bore (6) of the housing by a pressure piston (7) which is axially movable relative to the housing and which protrudes with its head (16) for mounting a rocker arm beyond an edge (9) of the housing (3) and an upper side (10) of the cylinder head (5), wherein a high-pressure chamber (13) for a hydraulic medium is located axially below a head-remote base (11) of the pressure piston (7) between said base and a housing base or receiving bore base (12), to which hydraulic medium can be supplied via a non-return valve (14) at the base (11) from a reservoir (15) enclosed by the pressure piston (7), wherein a guide line for introducing hydraulic medium into the reservoir (15) of the pressure piston (7) is provided in the outer circumferential side (2) of the housing (3) via a collecting channel (18) intersecting the upper side (10) of the cylinder head (5) for injecting oil or oil mist, which leads into at least one radial passage (20) in the housing (3) at a section (19) arranged at a receiving-bore-side low point, which radial passage is in fluid connection with at least one radial opening (21) in the pressure piston (7) leading into its reservoir (15), characterized in that the upper side (10) of the cylinder head (5) is planar at least in the inlet region of the receiving bore (4) and the receiving bore (4) is at the same time smooth-walled and stepless; two pre-storage sections (22, 23) for the hydraulic medium are provided, of which a first pre-storage section (22) is formed by an accumulation channel (18) which is present as a surrounding annular space in the outer peripheral side (2) of the housing (3), and a second pre-storage section (23) is formed either by an annular recess in the bore (6) of the housing (3) or by an annular recess in the peripheral side (8) of the pressure piston (7), wherein the first pre-storage section (22) is connected via the radial through-opening (20) with the second pre-storage section (23) and the second pre-storage section is connected via the radial opening (21) with a reserve chamber (15) in the pressure piston (7), wherein a push-out spring (17) which is arranged in the high-pressure chamber (13) and which is supported at the other end on the housing bottom (12) acts on the bottom (11) of the pressure piston (7), wherein the displacement movement of the pressure piston (7) is limited by a stop means (24) extending radially between the pressure piston (7) and the housing (3) in such a way that, in the maximum displacement position of the pressure piston (7), the radial opening (21) of the pressure piston is further from the head than the radial passage (20) in the housing (3).
2. Support element according to claim 1, characterized in that the radial through-going portion (20) is not lower than 1/4 of the length of the housing, measured from the edge (9) of the housing.
3. Support element according to claim 1, characterized in that in the pressure piston (7) there is arranged at least one diverting opening (25) for the radial through-going of the hydraulic medium, which extends in an axial section between the bottom (11) of the pressure piston and the radial opening (21).
4. The support element according to claim 3, characterized in that the pressure piston (7) is formed by a lower axial section (26) with a bottom (11) and an upper axial section (27) with a head (16) independent of the lower axial section, wherein the at least one diverting opening (25) is between mutually opposite end sides (28, 29) of the upper and lower axial sections.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018108287.8 | 2018-04-09 | ||
| DE102018108287.8A DE102018108287A1 (en) | 2018-04-09 | 2018-04-09 | Hydraulic support for a valve train of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110359974A CN110359974A (en) | 2019-10-22 |
| CN110359974B true CN110359974B (en) | 2022-08-19 |
Family
ID=67991799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910265393.1A Active CN110359974B (en) | 2018-04-09 | 2019-04-03 | Hydraulic support element for a valve train of an internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110359974B (en) |
| DE (1) | DE102018108287A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202023101104U1 (en) | 2023-03-09 | 2023-03-22 | Schaeffler Technologies AG & Co. KG | Hydraulic support element for a valve drive of an internal combustion engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010049324A1 (en) * | 2008-10-30 | 2010-05-06 | Schaeffler Technologies Gmbh & Co. Kg | Valve drive of an internal combustion engine having a support element that can be switched off |
| DE102014214383A1 (en) * | 2014-07-23 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | Hydraulic valve clearance compensation element for internal combustion engines |
| DE102015221038A1 (en) * | 2015-02-11 | 2016-08-11 | Schaeffler Technologies AG & Co. KG | Supporting element for a valve train of an internal combustion engine |
| DE102015209336A1 (en) * | 2015-05-21 | 2016-11-24 | Schaeffler Technologies AG & Co. KG | Hydraulic compensation element for the valve train of an internal combustion engine |
| CN106471224A (en) * | 2014-06-26 | 2017-03-01 | 舍弗勒技术股份两合公司 | Support component |
| DE102016200625A1 (en) * | 2016-01-19 | 2017-07-20 | Schaeffler Technologies AG & Co. KG | Mounting sleeve for valve train support elements of an internal combustion engine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009040607A1 (en) * | 2009-09-08 | 2011-03-10 | Schaeffler Technologies Gmbh & Co. Kg | Assembly for a valve train of an internal combustion engine |
| DE102012200759A1 (en) * | 2012-01-19 | 2013-07-25 | Schaeffler Technologies AG & Co. KG | Valve operation system connected to internal combustion engine, has supporting elements which are provided with restricted side path over which hydraulic fluid in channel is guided to pressure chamber, in low pressure mode |
| DE102013215988B4 (en) * | 2013-08-13 | 2022-02-03 | Schaeffler Technologies AG & Co. KG | Hydraulic support element for a valve drive of an internal combustion engine |
-
2018
- 2018-04-09 DE DE102018108287.8A patent/DE102018108287A1/en active Pending
-
2019
- 2019-04-03 CN CN201910265393.1A patent/CN110359974B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010049324A1 (en) * | 2008-10-30 | 2010-05-06 | Schaeffler Technologies Gmbh & Co. Kg | Valve drive of an internal combustion engine having a support element that can be switched off |
| CN106471224A (en) * | 2014-06-26 | 2017-03-01 | 舍弗勒技术股份两合公司 | Support component |
| DE102014214383A1 (en) * | 2014-07-23 | 2016-01-28 | Schaeffler Technologies AG & Co. KG | Hydraulic valve clearance compensation element for internal combustion engines |
| DE102015221038A1 (en) * | 2015-02-11 | 2016-08-11 | Schaeffler Technologies AG & Co. KG | Supporting element for a valve train of an internal combustion engine |
| DE102015209336A1 (en) * | 2015-05-21 | 2016-11-24 | Schaeffler Technologies AG & Co. KG | Hydraulic compensation element for the valve train of an internal combustion engine |
| DE102016200625A1 (en) * | 2016-01-19 | 2017-07-20 | Schaeffler Technologies AG & Co. KG | Mounting sleeve for valve train support elements of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018108287A1 (en) | 2019-10-10 |
| CN110359974A (en) | 2019-10-22 |
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Effective date of registration: 20240320 Address after: 1st Floor, Building 2, No. 1 Antuo Road, Anting Town, Jiading District, Shanghai Patentee after: SCHAEFFLER HOLDING(CHINA) Co.,Ltd. Country or region after: China Address before: German Herzogenaurach Patentee before: SCHAEFFLER TECHNOLOGIES AG & CO. KG Country or region before: Germany |