EP1983162A2 - A connection device for connecting rocker, valve or injection assemblies in internal combustion engines - Google Patents
A connection device for connecting rocker, valve or injection assemblies in internal combustion engines Download PDFInfo
- Publication number
- EP1983162A2 EP1983162A2 EP08005470A EP08005470A EP1983162A2 EP 1983162 A2 EP1983162 A2 EP 1983162A2 EP 08005470 A EP08005470 A EP 08005470A EP 08005470 A EP08005470 A EP 08005470A EP 1983162 A2 EP1983162 A2 EP 1983162A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- connection device
- button
- internal combustion
- valve
- recess
- 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.)
- Withdrawn
Links
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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
-
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/146—Push-rods
-
- 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
-
- 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
- F01L2810/00—Arrangements solving specific problems in relation with valve gears
- F01L2810/02—Lubrication
Definitions
- the present invention relates to a connection device for connecting rocker, valve or injection assemblies in internal combustion engines.
- the above ball coupling comprises a spherical head screw or insert, including a vertical element coupled to the rocker assembly, for engaging in a recess defined in a button element which, by engaging with a driving plate, allows force to be transferred to a component to be driven, usually comprising the valve or injection assembly, as is shown in figures 1 and 2 .
- Said button is held on the insert head portion by a resilient element or O-ring, preventing the button from disengaging from its recess, to be properly mounted on the engine.
- the rocker conventionally comprises a plurality of throughgoing holes communicating with a further hole formed in the insert leading to the recess, therethrough yet another hole for allowing oil to be directed toward the plate is formed.
- lubricating oil is conveyed to the plate through the lubricating hole which is normally axially directed or which, in same cases, is slanted, as shown in figure 3 , to facilitate a proper distribution of the lubricating oil due to the natural trend of the button to turn on itself.
- said button is made by a turning process, or a more inexpensive cold pressing process, and then it being further thermally processed to achieve the desired mechanical properties. Finally, said button is further subjected to optional finishing operations.
- the aim of the present invention is to overcome the above mentioned problem, by providing a connection device for connecting a rocker assembly with a valve assembly, or an injection assembly in an internal combustion engine, allowing the lubricating oil to be optimally distributed even if the device is made by a cold pressing method.
- a main object of the invention is to provide such a connection device which always provide an even distribution of the lubricating oil on contacting surfaces between the button and driving plate.
- Yet another object of the present invention is to provide such a connection device which, owing to its specifically designed construction, is very reliable and safe in operation.
- Yet another object of the present invention is to provide such a connection device which can be easily made starting from easily available elements and materials, and which, moreover, is very competitive from a mere economic standpoint.
- connection device for connecting a rocker assembly, a valve assembly or an injection assembly, in an internal combustion engine
- said connection device comprising a button defining a recess for receiving an insert coupled to said rocker assembly, said recess having lubricating hole
- said connection device also comprises, on a face of, said button contacting a driving plate, a slot extending from said lubricating hole to an outer periphery of said button.
- connection device for connecting a rocker assembly, a valve assembly or an injection assembly in an internal combustion engine, which is illustrated, by way of an indicative, but not limitative example, in the accompanying drawings, where:
- connection device for connecting a rocker assembly, a valve assembly or an injection assembly in an internal combustion engine comprises a button, generally indicated by the reference number 1, defining a substantially half-spherical recess 2, for engaging therein a spherical head 3 of an insert or screw 4, to be coupled to a rocker 5.
- Said insert or screw 4 comprises a conventional lubricating duct.6 communicating with a further duct 7 defined in the rocker and leading to the recess where a hole 8 facing to a driving plate 9 associated with a spring 10 for coupling to a valve or an injection assembly is formed.
- the main feature of the invention is that, on the button surface or face contacting the driving plate 9, a slot 20, extending from the hole 8 and leading to the button periphery, is formed.
- the slot 10 which preferably radially extends, operates to facilitate a distribution of oil through the overall contacting surface, owing to the trend of the button to turn on itself, as the engine is operated, thereby spreading lubricating oil through the overall contacting surface.
- the small size of the slot is such as not to considerably increase the contact effort on the remaining contact surface, thereby the original function of the button is held unalterated.
- a further important feature to be stressed is that the slot can be directly made by a cold pressing operation, at a very low cost.
- the used materials, as well as the contingent size and shapes can be any, depending to requirements.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Fuel-Injection Apparatus (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
- The present invention relates to a connection device for connecting rocker, valve or injection assemblies in internal combustion engines.
- As is known, in internal combustion engines, both of an Otto cycle type and a Diesel cycle type, the connection between the rocker assemblies and valves, or with the injection assembly, is typically made by a ball coupling allowing force to be transferred to a bottom body, consisting of the valve or injector device.
- The above ball coupling comprises a spherical head screw or insert, including a vertical element coupled to the rocker assembly, for engaging in a recess defined in a button element which, by engaging with a driving plate, allows force to be transferred to a component to be driven, usually comprising the valve or injection assembly, as is shown in
figures 1 and 2 . - Said button is held on the insert head portion by a resilient element or O-ring, preventing the button from disengaging from its recess, to be properly mounted on the engine.
- To provide a proper lubricating, and, in particular, a forced lubricating, the rocker conventionally comprises a plurality of throughgoing holes communicating with a further hole formed in the insert leading to the recess, therethrough yet another hole for allowing oil to be directed toward the plate is formed.
- With such an arrangement, lubricating oil is conveyed to the plate through the lubricating hole which is normally axially directed or which, in same cases, is slanted, as shown in
figure 3 , to facilitate a proper distribution of the lubricating oil due to the natural trend of the button to turn on itself. - Typically, said button is made by a turning process, or a more inexpensive cold pressing process, and then it being further thermally processed to achieve the desired mechanical properties. Finally, said button is further subjected to optional finishing operations.
- In prior solutions, the provision of the above mentioned slanted lubricating holes allows lubricating oil to be better distributed; however, this arrangement is not compatible with a cold pressing operation, and necessarily requires- a further very expensive turning process.
- Accordingly, the aim of the present invention is to overcome the above mentioned problem, by providing a connection device for connecting a rocker assembly with a valve assembly, or an injection assembly in an internal combustion engine, allowing the lubricating oil to be optimally distributed even if the device is made by a cold pressing method.
- Within the scope of the above mentioned aim, a main object of the invention is to provide such a connection device which always provide an even distribution of the lubricating oil on contacting surfaces between the button and driving plate.
- Yet another object of the present invention is to provide such a connection device which, owing to its specifically designed construction, is very reliable and safe in operation.
- Yet another object of the present invention is to provide such a connection device which can be easily made starting from easily available elements and materials, and which, moreover, is very competitive from a mere economic standpoint.
- According to the present invention, the above mentioned aim and objects, as well as yet other objects, which will become more apparent hereinafter, are achieved by a connection device for connecting a rocker assembly, a valve assembly or an injection assembly, in an internal combustion engine, said connection device comprising a button defining a recess for receiving an insert coupled to said rocker assembly, said recess having lubricating hole, characterized in that said connection device also comprises, on a face of, said button contacting a driving plate, a slot extending from said lubricating hole to an outer periphery of said button.
- Further characteristics and advantages of the present invention will become more apparent hereinafter from the following detailed disclosure of a preferred, though not exclusive, embodiment of a connection device for connecting a rocker assembly, a valve assembly or an injection assembly in an internal combustion engine, which is illustrated, by way of an indicative, but not limitative example, in the accompanying drawings, where:
-
Figure 1 is a side elevation view showing the connection device for connecting a rocker assembly, a valve assembly or an injection assembly in an internal combustion engine according to the invention; -
Figure 2 is a cross sectional view showing a connection assembly of the prior art; -
Figure 3 is a further cross sectional view showing a prior button element including a slanted hole; -
Figure 4 is a perspective view showing the button of the connection device according to the present invention; -
Figure 5 is a cross sectional view showing the connection device according to the invention. - With reference to the number references of the above mentioned figures, the connection device for connecting a rocker assembly, a valve assembly or an injection assembly in an internal combustion engine according to the present invention comprises a button, generally indicated by the reference number 1, defining a substantially half-
spherical recess 2, for engaging therein aspherical head 3 of an insert orscrew 4, to be coupled to arocker 5. - Said insert or
screw 4 comprises a conventional lubricating duct.6 communicating with afurther duct 7 defined in the rocker and leading to the recess where ahole 8 facing to adriving plate 9 associated with aspring 10 for coupling to a valve or an injection assembly is formed. - The main feature of the invention is that, on the button surface or face contacting the
driving plate 9, aslot 20, extending from thehole 8 and leading to the button periphery, is formed. - The
slot 10, which preferably radially extends, operates to facilitate a distribution of oil through the overall contacting surface, owing to the trend of the button to turn on itself, as the engine is operated, thereby spreading lubricating oil through the overall contacting surface. - Even in a case in which the driving plate is provided with a lubricating
hole 11 aligned with therecess hole 8, saidslot 20 would allow lubricating oil to be conveyed to the contacting surface, thereby preventing said lubricating oil from directly flowing to the bottom lubricatinghole 11. - Such a distribution or diffusion occurs by a capillarity effect which practically draws lubricating oil from the main duct thereof, even in absence of an upstream overpressure. - -
- In this connection it should be pointed out that the small size of the slot is such as not to considerably increase the contact effort on the remaining contact surface, thereby the original function of the button is held unalterated.
- A further important feature to be stressed is that the slot can be directly made by a cold pressing operation, at a very low cost.
- From the above disclosure it should be apparent that the invention fully achieves the intended aim and objects.
- In particular, the fact is to be pointed out that the provision of the
slot 20, in addition to allowing an even distribution of lubricating oil, also permits to make the subject device at a very low cost. - The invention, as disclosed, is susceptible to several modifications and variations, all of which will come within the scope of the invention.
- Moreover, all the details can be replaced by other technically equivalent elements.
- In practicing the invention, the used materials, as well as the contingent size and shapes, can be any, depending to requirements.
Claims (4)
- A connection device for connecting a rocker assembly, a valve assembly or an injection assembly, in an internal combustion engine, said connection device comprising a button defining a recess for receiving an insert coupled to said rocker assembly, said recess having a lubricating hole, characterized in that said connection device also comprises, on a face of said button contacting a driving plate, a slot extending from said lubricating hole to an outer periphery of said button.
- A connection device according to claim 1, characterized in that said slot extends substantially radially from said lubricating hole.
- A connection device according to claim 1, characterized in that said button is made by a cold pressing process.
- A connection device according to claim 1, characterized in that said slot allows lubricating oil to be distributed by a capillarity effect, with respect to the oil duct communicating with said lubricating hole.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000779A ITMI20070779A1 (en) | 2007-04-17 | 2007-04-17 | CONNECTION DEVICE BETWEEN THE BARBELL AND THE VALVES OR THE INJECTION UNIT IN INTERNAL COMBUSTION ENGINES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1983162A2 true EP1983162A2 (en) | 2008-10-22 |
EP1983162A3 EP1983162A3 (en) | 2009-12-09 |
Family
ID=39688847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08005470A Withdrawn EP1983162A3 (en) | 2007-04-17 | 2008-03-25 | A connection device for connecting rocker, valve or injection assemblies in internal combustion engines |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080257293A1 (en) |
EP (1) | EP1983162A3 (en) |
IT (1) | ITMI20070779A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114542228A (en) * | 2022-02-23 | 2022-05-27 | 常柴股份有限公司 | Internal combustion engine push rod capable of reducing loss |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4578547B2 (en) * | 2008-07-10 | 2010-11-10 | 株式会社オティックス | Rocker arm with lubricating oil supply path |
JP5241533B2 (en) * | 2009-01-19 | 2013-07-17 | 株式会社オティックス | Rocker arm |
US9551242B2 (en) * | 2014-11-24 | 2017-01-24 | Caterpillar Inc. | Rocker arm for engines |
JP6899939B1 (en) * | 2020-03-26 | 2021-07-07 | 株式会社オティックス | Valve gear |
DE102021100952A1 (en) | 2021-01-19 | 2022-07-21 | Schaeffler Technologies AG & Co. KG | Solid construction rocker arm for a valve train of a heavy-duty internal combustion engine |
DE102021102690A1 (en) | 2021-02-05 | 2022-08-11 | Schaeffler Technologies AG & Co. KG | Solid construction rocker arm for a valve drive of a heavy-duty internal combustion engine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3113831A1 (en) * | 1980-05-07 | 1982-02-25 | Fäster GmbH und Co KG Befestigungstechnik, 7800 Freiburg | Screw having screw-turning slots arranged in the form of a cross in the screw head |
US6273042B1 (en) * | 1999-06-14 | 2001-08-14 | Amsted Industries Incorporated | Rocker assemblies for control of engine valves and method of assembling such rocker assemblies |
WO2006132580A1 (en) * | 2005-06-07 | 2006-12-14 | Scania Cv Ab (Publ) | Apparatus for transferring a movement from a rocker arm to a valve in a combustion engine and a combustion engine comprising such an apparatus |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6807932B2 (en) * | 2001-11-22 | 2004-10-26 | Ntn Corporation | Rocker arm |
-
2007
- 2007-04-17 IT IT000779A patent/ITMI20070779A1/en unknown
-
2008
- 2008-03-24 US US12/077,997 patent/US20080257293A1/en not_active Abandoned
- 2008-03-25 EP EP08005470A patent/EP1983162A3/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3113831A1 (en) * | 1980-05-07 | 1982-02-25 | Fäster GmbH und Co KG Befestigungstechnik, 7800 Freiburg | Screw having screw-turning slots arranged in the form of a cross in the screw head |
US6273042B1 (en) * | 1999-06-14 | 2001-08-14 | Amsted Industries Incorporated | Rocker assemblies for control of engine valves and method of assembling such rocker assemblies |
WO2006132580A1 (en) * | 2005-06-07 | 2006-12-14 | Scania Cv Ab (Publ) | Apparatus for transferring a movement from a rocker arm to a valve in a combustion engine and a combustion engine comprising such an apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114542228A (en) * | 2022-02-23 | 2022-05-27 | 常柴股份有限公司 | Internal combustion engine push rod capable of reducing loss |
Also Published As
Publication number | Publication date |
---|---|
US20080257293A1 (en) | 2008-10-23 |
ITMI20070779A1 (en) | 2008-10-18 |
EP1983162A3 (en) | 2009-12-09 |
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18D | Application deemed to be withdrawn |
Effective date: 20100610 |