US3913538A - Hydraulic valve-play compensating element for internal combustion engines - Google Patents

Hydraulic valve-play compensating element for internal combustion engines Download PDF

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US3913538A
US3913538A US401547A US40154773A US3913538A US 3913538 A US3913538 A US 3913538A US 401547 A US401547 A US 401547A US 40154773 A US40154773 A US 40154773A US 3913538 A US3913538 A US 3913538A
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space
supply space
internal combustion
defoaming
compensating element
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Erich Ableitner
Burkhard Ott
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Daimler Benz AG
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Daimler Benz AG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20Adjusting or compensating clearance
    • F01L1/22Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405Adjusting 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

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  • the present invention relates to a hydraulic valveplay compensating element for internal combustion engines, which includes two'parts longitudinally displaceable relative to one another, which enclose therebetween a pressure space, separated by a check valve from a supply space which is connected with the lubricating oil circulatory system of the internal combustion engine.
  • Valveplay compensating elements in which the supply space is connected directly with the lubricating oil circulatory system of the internal combustion engine by way of a tap line, have not found acceptance to date in practice because it was not possible with tolerable expenditures to so defoam the lubricating oil foamed by the admixture of air, that only air-free oil reaches the pressure space. Tests to achieve a removal of air bubbles by a connection of the pressure space with the supply space by way of leakage oil bores or by a connection of the pressure space with temporarily free and throttled leakage oil bores leading out of the element, did not lead to a success when these arrangements were provided in elements for fast-running internal combustion engines.
  • the present invention is therefore concerned with the task to so construct a hydraulic valve-play compen' sating element with direct connection to the lubricating oil circulatory system that also at high rotational speeds of the internal combustion engine, a good defoaming with rapid removal of the air components takes place.
  • the supply space is in communication in through-flow relation with the lubricating oil circulatory system and in that means are provided in the supply space upstream of the check valve which defoam the oil flow.
  • a safe defoaming with reliable removal of the separated-out air components can be realized by the present invention, which is not influenced by high rotational speeds of the internal combustion engine so that the valve actuation can operate clearance-free also in this rotational speed range with the requisite hydraulic hardness in the valve-play compensating element.
  • the means for defoaming may be arranged in a structurally and functionally favorable manner within a separate space which is in communication both with the inlet of the check valve as also with the supply space and is arranged within the supply space separated therefrom.
  • This separate space may be connected with the sup ply space by one or several bores at a location which is disposed with the installed element at or in proximity to the upper end of the separate space.
  • the means for defoaming may consist in a simple manner of a helix having a slight pitch which slows down the oil stream.
  • the means for defoaming may also be constructed as labyrinth and finally they may also consist of a filter.
  • Another object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which is very reliable in operation, yet involves readily acceptable expenditures for the defoaming of the air.
  • a further object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which assures a reliable defoaming of the lubricating air by extremely simple means as well as a reliable removal of the air bubbles under all operating conditions.
  • Still a further object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which is capable of operating also at high rotational speeds without jeopardizing the defoaming of the lubricating oil.
  • FIG. 1 is a partial cross-sectional view through a valve actuating mechanism for an internal combustion engine equipped with a valve-play compensating element having a helix for defoaming the oil in accordance with the present invention
  • FIGS. 2 and 3 are partial cross-sectional views illustrating modified embodiments of a valve-play compen sating element equipped with a labyrinth for defoaming the oil in accordance with the present invention.
  • FIGS. 4 and 5 are partial cross-sectional views through valve-play compensating elements with filters for defoaming the lubricating oil in accordance with the present invention. 7
  • valve actuating mechanism for an i ntemal combustion engine includes a cam shaft 1, a rocker arm 2, a valve 3, of which only the valve stem is shown, and a hydraulic valve-play compensating element generally designated by reference numeral4.
  • the valve-play compensating element 4 is arranged in a bore 5 of the cylinder head 6 of the internal combustion engine and includes two parts 7 and 8.
  • the part 7 is constructed cylinderlike and is fixedly arranged at the cylinder head 6 by conventional means.
  • the part 8 is constructed pistonlike and is longitudinallydisplaceably supported in the part 7.
  • the upper end of the valve-play compensating part 8 serves as bearing support 9 for the rocker arm 2.
  • the two parts 7 and 8 enclose therebetween a pressure space 10 which is connected by way of a check valve 1 l with a supply space 12 disposed below the part 7.
  • the supply space 12 is in communication in throughflow relationship with the lubricating oil circulatory system of the internal combustion engine in that it is connected, on the one hand, by way of a bore 13 with a main oil channel supplying lubricating oil and by way of a channel 14 and bores 15 and 16 with the bearing 9 to be lubricated.
  • the connection according to the present invention is so realized that lubricating oil flows through the space 12 in the course of its flow path from bore 13 into bores 15 and 16 by way of channel 14.
  • An essentially cylindrical member According to FIG. 4, a in the member 17 whereas according to FIG. 5, also a paper filter 28 can be used for the same purpose.
  • valve-play com- :pensating element I .As t'o'the rest, theoperation of the valve-play com- :pensating element is conventional so that a further de- ,tailed descriptionthereof is dispensed with herein.
  • a labyrinth 23 may also be arranged in the member 17, as shown in FIG. 2, in lieu of a helix, whereby the lubricatingoil has to flow through the labyrinth 23 in the axial direction.
  • FIG. 2 further illustrates, in lieu of bores (FIG. 1), bores 24 and 25 disposed one behind the other in the axial direction may be provided,
  • FIG. 3 illustrates a labyrinth 26in the member 17 of the mechanism which consists of annular disks disposed one above the other with respectively offset passage bores.
  • steel-wool filter 27 is arranged While we have shown and described several embodiments in accordance with the present invention, it is understood that the same is not limited thereto but is susceptible of numerous changes and modifications as known to those skilled in the art, and we therefore do not wish to be limited to the details shown and described herein but intend to cover all such changes and modifications as are encompassed by the scope of the ment includes two members longitudinally displaceable relative toone another, which members enclose therebetween a pressure space separated by a check valve means from a supply space, characterized in that a lubricating oil circulatory system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space communicating with said check valve means is provided in said supply space, bore means are provided for communicating said supply space with said separate oil receiving space, and in that a defoaming means is arranged in said separate oil receiving space for defoaming the oil flowing into said pressure space.
  • a hydraulic valve play compensating element characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of the lubricating oil takes place through the supply space in the 4 course of the lubrication of other parts of an internal combustion engine.
  • a hydraulic valve play compensating element characterized in that said parts are cal member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member whereby the oil flow in said cylindrical member is substantially in the axi thereof.
  • a hydraulic valve play compensating element characterized in that a further bore means is provided for discharging separated air'from said separate oil receiving space.
  • a hydraulic valve play compensating element characterized in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
  • a hydraulic valve play compensating element according to claim 7, characterized in that 'a further bore means is provided for discharging separated air from said separate oil receiving space.
  • Ahydraulic valve play compensating element characterized in that two annular discs are provided having offset passage bores, and in that a filter element is disposed between said two annular discs.
  • a hydraulic valve play compensating element according to claim 9, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
  • a hydraulic valve play compensating element characterized in that said filter element is a steelwool filter.
  • a hydraulic valve play compensating element characterized-in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and in that a filter element is disposed in said'passage means.
  • a hydraulic valve play compensating element characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
  • a hydraulic valve play compensating element for internal combustion engines which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a eral bore means.
  • the defoamingmeans are arranged in a separate space which is in communication both with the inlet of the check valve means as also with the supply space, said separate space is arranged within the supply space, though separated therefrom, and in that the separate. space is connected with the supply space by at least one bore means at a location which is disposed at least in proximity to the upperend of the separate space.
  • a hydraulic valve play compensating element according to claim 6 characterized in that said separate space is connected with the supply space by way of sev- 17.
  • ing means includes a helix withslight pitch which slows down the oil flow.
  • bore means are provided for communicating said supply space with said separate oil receiving space, means are provided in said separateoil receiving space upstream of the check valve means for defoaming the oil flow, said defoaming means including a labyrinth 24.
  • An internal combustion engine comprising: a cylinder head means, a bore provided in said cylinder head means, a hydraulic compensating means including two members longitudinally displaceable relative to one another disposedin said bore, a pressure space"enclosed by said two members, a lubricating oil circulatory system for the internal combustion engine, a supply space provided in said bore operatively connected with said lubricating oil circulatory system, a check valve means for separating said pressure space from said supply space, a separate oil receiving means arranged in said supply space and communicating with said check valve means, bore means for communicating said supply space with said separate oil receiving space, and a defoaming means arranged in said separate oil receiving space for defoaming the oil flowing i 19.
  • a hydraulic valve play compensating element according to claim 6, characterized in that the defoaming means include a filter means.
  • a hydraulic valve play compensating element characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of lubricating oil takes place through the supply space in the course of the lubrication of other parts of an internal combustion engine.
  • a hydraulic valve play compensating element for internal combustion engines which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check-valve means from a supply space, characterized in that a ludefoaming the oil flow, said defoaming means includes a helical member having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
  • a hydraulic valve play compensating element for internal combustion engines which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check valve means from a supply space, characterized in that a lubricating oil system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space in communication with the check valve means is provided in said supinto said pressure space.
  • An internal combustion engine according to claim 24, further comprising a valve actuating mechanism, and wherein means are provided for communicating said supply space with said valve actuating mechanism for lubricating said mechanism.
  • defoaming means includes a helical member arranged in said separate oil receiving space having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
  • said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
  • said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and a filter element 7 disposed in said passage means.

Abstract

A hydraulic valve-play compensating element for internal combustion engines with two elements longitudinally displaceable relative to one another which enclose a pressure space that is separated by way of a check valve from a supply space connected to the oil circulatory system of the internal combustion engine; the supply space is thereby interconnected into the oil circulatory system to permit an oil flow through the same while means are also provided in the supply space upstream of the check valve for defoaming the oil flow.

Description

United States Patent Ableitner et al. Oct. 21, I975 [54] HYDRAULIC VALVE-PLAY 2,145,484 1/1939 Johnson 123/9056 COMPENSATING ELEMENT FOR 2,153,097 4/1939 Moorhouse 123/9059 2,246,330 6/1941 Voorhies l23/90.56 INTERNAL COMBUSTION ENGINES 2,250752 7/194] [75] Inventors: Erich Ableitner, Hochberg; 2,267,535 12/1941 Burkhard Stuttgart both of 2,309,740 2/1943 Voorhies Germany 2,942,595 6/1960 Bergmann 123/9055 3,025,842 3/1962 Van Slooten 123/9058 [73] Assignee: Daimler-Benz Aktiengesellschaft, 3,314,404 4/1967 Thompson 123/9035 Germany Primary ExaminerCharles .l. Myhre [22] Flled' Sept' 1973- Assistant ExaminerDaniel J. OConnor .[21] Appl. No.: 401,547 Attorney, Agent, or Firm-Craig & Antonelli [30] Foreign Application Priority Data [57] ABSTRACT Sept. 27, 1972 Germany 2247459 A hydraulic 'P Y compensating element for ternal combustion engines with two elements longitu- 52 us CL 23 123/9035; 123/9055; dinally displaceable relative to one another which en- 123/9056 close a pressure space that is separated by way of a [51] Int. c1. FOIL l/l8 check valve fmm Supply Space connected to the Oil [58] Field of Search 123/9056, 90.57, 90.58, circulatory System Of the internal Combustion engine; 23 0 9055 9035, 9046, 9033 the supply space is thereby interconnected into the oil circulatory system to permit an oil flow through the 5 References Cited same while means are also provided in the supply UNITED STATES PATENTS space upstream of the check valve for defoaming the '1 fl 2,096,257 10/1937 Moorhouse 123/9059 01 OW 8d 15 11/1937 Voorhies 123/9059 36 Claims, 5 Drawing Flgures US. Patent Oct. 21,1975 Sheet10f2 3,913,538
HYDRAULIC VALVE-PLAY COMPENSATING ELEMENT FOR INTERNAL COMBUSTION ENGINES The present inventionrelates to a hydraulic valveplay compensating element for internal combustion engines, which includes two'parts longitudinally displaceable relative to one another, which enclose therebetween a pressure space, separated by a check valve from a supply space which is connected with the lubricating oil circulatory system of the internal combustion engine.
Valveplay compensating elements, in which the supply space is connected directly with the lubricating oil circulatory system of the internal combustion engine by way of a tap line, have not found acceptance to date in practice because it was not possible with tolerable expenditures to so defoam the lubricating oil foamed by the admixture of air, that only air-free oil reaches the pressure space. Tests to achieve a removal of air bubbles by a connection of the pressure space with the supply space by way of leakage oil bores or by a connection of the pressure space with temporarily free and throttled leakage oil bores leading out of the element, did not lead to a success when these arrangements were provided in elements for fast-running internal combustion engines.
The present invention is therefore concerned with the task to so construct a hydraulic valve-play compen' sating element with direct connection to the lubricating oil circulatory system that also at high rotational speeds of the internal combustion engine, a good defoaming with rapid removal of the air components takes place.
The underlying problems are solved according to the present inventionin that the supply space is in communication in through-flow relation with the lubricating oil circulatory system and in that means are provided in the supply space upstream of the check valve which defoam the oil flow.
A safe defoaming with reliable removal of the separated-out air components can be realized by the present invention, which is not influenced by high rotational speeds of the internal combustion engine so that the valve actuation can operate clearance-free also in this rotational speed range with the requisite hydraulic hardness in the valve-play compensating element.
In one advantageous embodiment of the subject matter of the present invention, the means for defoaming may be arranged in a structurally and functionally favorable manner within a separate space which is in communication both with the inlet of the check valve as also with the supply space and is arranged within the supply space separated therefrom.
This separate space may be connected with the sup ply space by one or several bores at a location which is disposed with the installed element at or in proximity to the upper end of the separate space.
The means for defoaming may consist in a simple manner of a helix having a slight pitch which slows down the oil stream.
However, the means for defoaming may also be constructed as labyrinth and finally they may also consist of a filter.
Accordingly, it is an object of the present invention toprovide a hydraulic valve play compensating element for internal combustion engines which avoids by simple means the aforementioned shortcomings and drawbacks encountered in the prior art. I
Another object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which is very reliable in operation, yet involves readily acceptable expenditures for the defoaming of the air.
A further object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which assures a reliable defoaming of the lubricating air by extremely simple means as well as a reliable removal of the air bubbles under all operating conditions.
Still a further object of the present invention resides in a hydraulic valve play compensating element for internal combustion engines which is capable of operating also at high rotational speeds without jeopardizing the defoaming of the lubricating oil.
These and other objects, features, and advantages of the present invention will become more apparent from the following description when taken in connection with the accompanying drawings which shows, for purposes of illustration only, several embodiments in accordance with the present invention, and wherein:
FIG. 1 is a partial cross-sectional view through a valve actuating mechanism for an internal combustion engine equipped with a valve-play compensating element having a helix for defoaming the oil in accordance with the present invention;
FIGS. 2 and 3 are partial cross-sectional views illustrating modified embodiments of a valve-play compen sating element equipped with a labyrinth for defoaming the oil in accordance with the present invention; and
FIGS. 4 and 5 are partial cross-sectional views through valve-play compensating elements with filters for defoaming the lubricating oil in accordance with the present invention. 7
Referring now to the drawing wherein like reference numerals are used throughout the various views to designate like parts, and more particularly to FIG. 1, the valve actuating mechanism for an i ntemal combustion engine includes a cam shaft 1, a rocker arm 2, a valve 3, of which only the valve stem is shown, and a hydraulic valve-play compensating element generally designated by reference numeral4. The valve-play compensating element 4 is arranged in a bore 5 of the cylinder head 6 of the internal combustion engine and includes two parts 7 and 8. The part 7 is constructed cylinderlike and is fixedly arranged at the cylinder head 6 by conventional means. The part 8 is constructed pistonlike and is longitudinallydisplaceably supported in the part 7. The upper end of the valve-play compensating part 8 serves as bearing support 9 for the rocker arm 2. The two parts 7 and 8 enclose therebetween a pressure space 10 which is connected by way of a check valve 1 l with a supply space 12 disposed below the part 7. The supply space 12 is in communication in throughflow relationship with the lubricating oil circulatory system of the internal combustion engine in that it is connected, on the one hand, by way of a bore 13 with a main oil channel supplying lubricating oil and by way of a channel 14 and bores 15 and 16 with the bearing 9 to be lubricated. In other words, the connection according to the present invention is so realized that lubricating oil flows through the space 12 in the course of its flow path from bore 13 into bores 15 and 16 by way of channel 14. An essentially cylindrical member According to FIG. 4, a in the member 17 whereas according to FIG. 5, also a paper filter 28 can be used for the same purpose.
17 connected with the part 7 forms on the inside of the supply space 12 a separate space 18 disposed upstream of the inlet of the check valve 11; a helix 19 with slight the space 18 is sucked by the lubricating oil streaminto' the supply space 12 through the bores 20 and together with the lubricating oil stream reaches the bearing 9 by way of the channel 14 and by way of the bores and 16, where the air is able to leave the bearing 9 by way of the bore 22. Lubricating oil discharged out of the bore 22 serves for the lubrication of the other parts of ;the valve actuating mechanism, such'as the contact sur- -v-f ace of the cam shaft 1 on the rocker am 2. I
I .As t'o'the rest, theoperation of the valve-play com- :pensating element is conventional so that a further de- ,tailed descriptionthereof is dispensed with herein.
A labyrinth 23 may also be arranged in the member 17, as shown in FIG. 2, in lieu of a helix, whereby the lubricatingoil has to flow through the labyrinth 23 in the axial direction. As FIG. 2 further illustrates, in lieu of bores (FIG. 1), bores 24 and 25 disposed one behind the other in the axial direction may be provided,
'of which the bores 24 serve for the supply of lubricating oil and the bores 25 for the discharge of separated-out air.
FIG. 3 illustrates a labyrinth 26in the member 17 of the mechanism which consists of annular disks disposed one above the other with respectively offset passage bores. I l
steel-wool filter 27 is arranged While we have shown and described several embodiments in accordance with the present invention, it is understood that the same is not limited thereto but is susceptible of numerous changes and modifications as known to those skilled in the art, and we therefore do not wish to be limited to the details shown and described herein but intend to cover all such changes and modifications as are encompassed by the scope of the ment includes two members longitudinally displaceable relative toone another, which members enclose therebetween a pressure space separated by a check valve means from a supply space, characterized in that a lubricating oil circulatory system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space communicating with said check valve means is provided in said supply space, bore means are provided for communicating said supply space with said separate oil receiving space, and in that a defoaming means is arranged in said separate oil receiving space for defoaming the oil flowing into said pressure space.
2. A hydraulic valve play compensating element according to claim 1, characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of the lubricating oil takes place through the supply space in the 4 course of the lubrication of other parts of an internal combustion engine. I
3. A hydraulic valve play compensating element accordingto claim 2, characterized inthat said parts are cal member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member whereby the oil flow in said cylindrical member is substantially in the axi thereof.
6. A hydraulic valve play compensating element according to claim 5, characterized in that a further bore means is provided for discharging separated air'from said separate oil receiving space.
al direction a V 7. A hydraulic valve play compensating element according to claim 1, characterized in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
8.. A hydraulic valve play compensating element according to claim 7, characterized in that 'a further bore means is provided for discharging separated air from said separate oil receiving space. i
' 9. Ahydraulic valve play compensating element according to claim 7, characterized in that two annular discs are provided having offset passage bores, and in that a filter element is disposed between said two annular discs.
10. A hydraulic valve play compensating element according to claim 9, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space. i
11. A hydraulic valve play compensating element according to claim 10, characterized in that said filter element is a steelwool filter.
12. A hydraulic valve play compensating element according to claim 1, characterized-in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and in that a filter element is disposed in said'passage means.
13. A hydraulic valve play compensating element according to claim 12, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
14. A hydraulic valve play compensating element ac- A cording to claim 13, characterized in that said filter element is a paper filter.
15. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a eral bore means. i
space upstream of the check valve means for defoaming the oil flow, the defoamingmeans are arranged in a separate space which is in communication both with the inlet of the check valve means as also with the supply space, said separate space is arranged within the supply space, though separated therefrom, and in that the separate. space is connected with the supply space by at least one bore means at a location which is disposed at least in proximity to the upperend of the separate space.
' 16. A hydraulic valve play compensating element according to claim 6, characterized in that said separate space is connected with the supply space by way of sev- 17. A hydraulic valve play compensating element according to claim 6, characterized in that said location "'is disposed at the upper end of said separate space.
ing means includes a helix withslight pitch which slows down the oil flow.
means.
ply'space, bore means are provided for communicating said supply space with said separate oil receiving space, means are provided in said separateoil receiving space upstream of the check valve means for defoaming the oil flow, said defoaming means including a labyrinth 24. An internal combustion engine comprising: a cylinder head means, a bore provided in said cylinder head means, a hydraulic compensating means including two members longitudinally displaceable relative to one another disposedin said bore, a pressure space"enclosed by said two members, a lubricating oil circulatory system for the internal combustion engine, a supply space provided in said bore operatively connected with said lubricating oil circulatory system, a check valve means for separating said pressure space from said supply space, a separate oil receiving means arranged in said supply space and communicating with said check valve means, bore means for communicating said supply space with said separate oil receiving space, and a defoaming means arranged in said separate oil receiving space for defoaming the oil flowing i 19. A hydraulic valve play compensating element according to claim 6, characterized in that the defoaming means include a labyrinth means.
20. A hydraulic valve play compensating element according to claim 6, characterized in that the defoaming means include a filter means.
21. A hydraulic valve play compensating element according to claim 6, characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of lubricating oil takes place through the supply space in the course of the lubrication of other parts of an internal combustion engine.
22. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check-valve means from a supply space, characterized in that a ludefoaming the oil flow, said defoaming means includes a helical member having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
23. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check valve means from a supply space, characterized in that a lubricating oil system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space in communication with the check valve means is provided in said supinto said pressure space.
25. An internal combustion engine according to claim 24, further comprising a valve actuating mechanism, and wherein means are provided for communicating said supply space with said valve actuating mechanism for lubricating said mechanism.
26. An internal combustion engine according to claim 24, wherein said bore means is disposed at least in proximity to the upper end of said separate oil receiving space.
27. An internal combustion engine according to claim 24, wherein said defoaming means includes a helical member arranged in said separate oil receiving space having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
28. An internal combustion engine according to claim 24, wherein said defoaming means includes a labyrinth means.
29. An internal combustion engine according to claim 24, wherein said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member whereby the oil flow in said cylindrical member is substantially in the axial direction thereof.
30. An internal combustion engine according to claim 29, wherein a further bore means is provided for discharging separate air from said separate oil receiving space.
31. An internal combustion engine according to claim 24, wherein said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
32. An internal combustion engine according to claim 31, wherein a further bore means is provided for discharging separated air from said separate oil receiving space.
in said'supply space, said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and a filter element 7 disposed in said passage means.
36. An internal combustion engine according to claim 34, wherein a further bore means is provided for discharging separated air from said separate oil receiving space.

Claims (36)

1. A hydraulic valve play compensating element for an internal combustion engine, the compensating element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by a check valve means from a supply space, characterized in that a lubricating oil circulatory system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space communicating with said check valve means is provided in said supply space, bore means are provided for communicating said supply space with said separate oil receiving space, and in that a defoaming means is arranged in said separate oil receiving space for defoaming the oil flowing into said pressure space.
2. A hydraulic valve play compensating element according to claim 1, characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of the lubricating oil takes place through the supply space in the course of the lubrication of other parts of an internal combustion engine.
3. A hydraulic valve play compensating element according to claim 2, characterized in that said parts are parts of the valve actuating mechanism.
4. A hydraulic valve play compensating element according to claim 1, characterized in that the defoaming means include a filter means.
5. A hydraulic valve play compensating element according to claim 1, characterized in that said separate oil receiving space is defined by a substantiAlly cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member whereby the oil flow in said cylindrical member is substantially in the axial direction thereof.
6. A hydraulic valve play compensating element according to claim 5, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
7. A hydraulic valve play compensating element according to claim 1, characterized in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
8. A hydraulic valve play compensating element according to claim 7, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
9. A hydraulic valve play compensating element according to claim 7, characterized in that two annular discs are provided having offset passage bores, and in that a filter element is disposed between said two annular discs.
10. A hydraulic valve play compensating element according to claim 9, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
11. A hydraulic valve play compensating element according to claim 10, characterized in that said filter element is a steelwool filter.
12. A hydraulic valve play compensating element according to claim 1, characterized in that said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and in that a filter element is disposed in said passage means.
13. A hydraulic valve play compensating element according to claim 12, characterized in that a further bore means is provided for discharging separated air from said separate oil receiving space.
14. A hydraulic valve play compensating element according to claim 13, characterized in that said filter element is a paper filter.
15. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check valve means from a supply space, characterized in that a lubricating oil circulatory system is provided, the supply space is operatively connected with the lubricating oil circulatory system, means are provided in the supply space upstream of the check valve means for defoaming the oil flow, the defoaming means are arranged in a separate space which is in communication both with the inlet of the check valve means as also with the supply space, said separate space is arranged within the supply space, though separated therefrom, and in that the separate space is connected with the supply space by at least one bore means at a location which is disposed at least in proximity to the upper end of the separate space.
16. A hydraulic valve play compensating element according to claim 6, characterized in that said separate space is connected with the supply space by way of several bore means.
17. A hydraulic valve play compensating element according to claim 6, characterized in that said location is disposed at the upper end of said separate space.
18. A hydraulic valve play compensating element according to claim 6, characterized in that said defoaming means includes a helix with slight pitch which slows down the oil flow.
19. A hYdraulic valve play compensating element according to claim 6, characterized in that the defoaming means include a labyrinth means.
20. A hydraulic valve play compensating element according to claim 6, characterized in that the defoaming means include a filter means.
21. A hydraulic valve play compensating element according to claim 6, characterized in that the supply space is in communication with the lubricating oil circulatory system in such a manner that a flow of lubricating oil takes place through the supply space in the course of the lubrication of other parts of an internal combustion engine.
22. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check valve means from a supply space, characterized in that a lubricating oil circulatory system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space in communication with the check valve means is provided in said supply space, bore means are provided for communicating said supply space with said separate oil receiving space, means are provided in said separate oil receiving space upstream of the check valve means for defoaming the oil flow, said defoaming means includes a helical member having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
23. A hydraulic valve play compensating element for internal combustion engines, which element includes two members longitudinally displaceable relative to one another, which members enclose therebetween a pressure space separated by way of a check valve means from a supply space, characterized in that a lubricating oil system is provided, the supply space is operatively connected with the lubricating oil circulatory system, a separate oil receiving space in communication with the check valve means is provided in said supply space, bore means are provided for communicating said supply space with said separate oil receiving space, means are provided in said separate oil receiving space upstream of the check valve means for defoaming the oil flow, said defoaming means including a labyrinth means.
24. An internal combustion engine comprising: a cylinder head means, a bore provided in said cylinder head means, a hydraulic compensating means including two members longitudinally displaceable relative to one another disposed in said bore, a pressure space enclosed by said two members, a lubricating oil circulatory system for the internal combustion engine, a supply space provided in said bore operatively connected with said lubricating oil circulatory system, a check valve means for separating said pressure space from said supply space, a separate oil receiving means arranged in said supply space and communicating with said check valve means, bore means for communicating said supply space with said separate oil receiving space, and a defoaming means arranged in said separate oil receiving space for defoaming the oil flowing into said pressure space.
25. An internal combustion engine according to claim 24, further comprising a valve actuating mechanism, and wherein means are provided for communicating said supply space with said valve actuating mechanism for lubricating said mechanism.
26. An internal combustion engine according to claim 24, wherein said bore means is disposed at least in proximity to the upper end of said separate oil receiving space.
27. An internal combustion engine according to claim 24, wherein said defoaming means includes a helical member arranged in said separate oil receiving space having a slight pitch in the flow direction of the oil for slowing down the oil flow from said supply space to said check valve means.
28. An internal combustion engine according to claim 24, wherein said defoaming meaNs includes a labyrinth means.
29. An internal combustion engine according to claim 24, wherein said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member whereby the oil flow in said cylindrical member is substantially in the axial direction thereof.
30. An internal combustion engine according to claim 29, wherein a further bore means is provided for discharging separate air from said separate oil receiving space.
31. An internal combustion engine according to claim 24, wherein said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including a labyrinth means arranged in said cylindrical member, said labyrinth means comprising at least two annular disc members disposed one above the other in said cylindrical member having offset passage bores to direct the flow from said supply space to said check valve means.
32. An internal combustion engine according to claim 31, wherein a further bore means is provided for discharging separated air from said separate oil receiving space.
33. An internal combustion engine according to claim 31, wherein two annular discs are provided having offset passage bores, and wherein a filter element is disposed between said two annular discs.
34. An internal combustion engine according to claim 33, wherein a further bore means is provided for discharging separated air from said separate oil receiving space.
35. An internal combustion engine according to claim 24, wherein said separate oil receiving space is defined by a substantially cylindrical member disposed in said supply space, said defoaming means including an annular disc element arranged in said cylindrical member, said disc element including a peripheral edge portion spaced from an internal wall of said cylindrical member to define a passage means, and a filter element disposed in said passage means.
36. An internal combustion engine according to claim 34, wherein a further bore means is provided for discharging separated air from said separate oil receiving space.
US401547A 1972-09-27 1973-09-27 Hydraulic valve-play compensating element for internal combustion engines Expired - Lifetime US3913538A (en)

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DE19722247459 DE2247459A1 (en) 1972-09-27 1972-09-27 HYDRAULIC VALVE CLEARANCE COMPENSATING ELEMENT FOR COMBUSTION MACHINERY

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US (1) US3913538A (en)
DE (1) DE2247459A1 (en)
FR (1) FR2217530B1 (en)
GB (1) GB1394635A (en)
IT (1) IT994300B (en)

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US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4538559A (en) * 1982-09-03 1985-09-03 Toyota Jidosha Kabushiki Kaisha Engine cam for use in internal combustion engine
JPS60206914A (en) * 1984-03-31 1985-10-18 Nittan Valve Kk Automatic correction device for valve gap of hydraulic valve
DE3623238A1 (en) * 1986-07-10 1988-02-04 Bayerische Motoren Werke Ag Device for the preparation of essentially air-free lubricating oil
US5311845A (en) * 1990-10-12 1994-05-17 Nittan Valve Co., Ltd. Oil pressure lash adjuster equipped with air vent
WO2006005404A1 (en) * 2004-07-10 2006-01-19 Schaeffler Kg Device for filtering lubricating oil
DE102007008409A1 (en) * 2007-02-21 2008-08-28 Schaeffler Kg Valve gear of an internal combustion engine with a drag lever
US20090050102A1 (en) * 2007-08-24 2009-02-26 Strandburg Alan G Oil filter having an integral metering orifice for a valve lifter oil manifold assembly
WO2018224074A1 (en) * 2017-06-07 2018-12-13 Schaeffler Technologies AG & Co. KG Hydraulic support element

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JPS56167808A (en) * 1980-05-28 1981-12-23 Toyota Motor Corp Oil feeder for hydraulic equipment of internal combustion engine
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FR2910529A3 (en) * 2006-12-22 2008-06-27 Renault Sas Hydraulic system i.e. hydraulic stop, for internal combustion engine of motor vehicle, has oil filter placed around external surface of cylindrical wall constituting body of system, and another filter placed on internal surface of wall

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Publication number Priority date Publication date Assignee Title
US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4538559A (en) * 1982-09-03 1985-09-03 Toyota Jidosha Kabushiki Kaisha Engine cam for use in internal combustion engine
JPS60206914A (en) * 1984-03-31 1985-10-18 Nittan Valve Kk Automatic correction device for valve gap of hydraulic valve
JPH0625526B2 (en) 1984-03-31 1994-04-06 日鍛バルブ株式会社 Hydraulic valve clearance automatic compensator
DE3623238A1 (en) * 1986-07-10 1988-02-04 Bayerische Motoren Werke Ag Device for the preparation of essentially air-free lubricating oil
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US5311845A (en) * 1990-10-12 1994-05-17 Nittan Valve Co., Ltd. Oil pressure lash adjuster equipped with air vent
US20070272192A1 (en) * 2004-07-10 2007-11-29 Peter Sailer Device for Filtering Lubricating Oil
WO2006005404A1 (en) * 2004-07-10 2006-01-19 Schaeffler Kg Device for filtering lubricating oil
DE102007008409A1 (en) * 2007-02-21 2008-08-28 Schaeffler Kg Valve gear of an internal combustion engine with a drag lever
WO2008101793A1 (en) * 2007-02-21 2008-08-28 Schaeffler Kg Valve train of an internal combustion engine with a cam follower
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US7549405B2 (en) * 2007-08-24 2009-06-23 Delphi Technologies, Inc. Oil filter having an integral metering orifice for a valve lifter oil manifold assembly
WO2018224074A1 (en) * 2017-06-07 2018-12-13 Schaeffler Technologies AG & Co. KG Hydraulic support element
CN110709586A (en) * 2017-06-07 2020-01-17 舍弗勒技术股份两合公司 Hydraulic support element
US11459915B2 (en) * 2017-06-07 2022-10-04 Schaeffler Technologies AG & Co. KG Hydraulic support element

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GB1394635A (en) 1975-05-21
DE2247459A1 (en) 1974-04-04
IT994300B (en) 1975-10-20
FR2217530A1 (en) 1974-09-06
FR2217530B1 (en) 1976-10-01

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