US20120186549A1 - Oscillating lever in a valve train of an internal-combustion engine - Google Patents
Oscillating lever in a valve train of an internal-combustion engine Download PDFInfo
- Publication number
- US20120186549A1 US20120186549A1 US13/295,458 US201113295458A US2012186549A1 US 20120186549 A1 US20120186549 A1 US 20120186549A1 US 201113295458 A US201113295458 A US 201113295458A US 2012186549 A1 US2012186549 A1 US 2012186549A1
- Authority
- US
- United States
- Prior art keywords
- arm
- axis
- valve
- compensation element
- bearing
- 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.)
- Abandoned
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
- F01L1/14—Tappets; 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
- F01L1/12—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
- F01L1/20—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
- F01L1/2411—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the valve stem 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
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0005—Deactivating valves
-
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Definitions
- the invention concerns a rocker arm or swing arm in a valve train of an internal combustion engine that has a bearing bore by means of which the arm is supported in a pivoting manner on a hollow axis located in a fixed position in the engine.
- Document DE-OS 197 41 078 shows rocker arms or swing arms of the type mentioned at the outset for the valve train of an internal combustion engine, with a hydraulic valve lash compensation element.
- the bearing support of an arm on the fixed axis in the engine is implemented not as a roller bearing but as a plain bearing, so that a potential for reducing friction that could be achieved with a roller bearing goes unused.
- the object of the invention is to laterally seal the rocker arm or swing arm to its bearing bore without the friction that arises in operation being increased thereby.
- the valve train can have a camshaft with cams for producing the pivoting motion of the arm, with a hydraulic valve lash compensation element that is connected to the arm and that acts on the tappet of a gas exchange valve, wherein a supply line is arranged in the arm, and a radial opening connecting the hollow interior space of the axis to the supply line is arranged in the axis in the region of the arm, in order to deliver hydraulic means through the hollow axis to the valve lash compensation element.
- rocker arm or swing arm is equipped with a hydraulic valve lash compensation element, it is necessary to ensure that a sufficient fluid pressure is maintained in supplying the compensation element with hydraulic means. This is necessary so that enough oil pressure is present for splash oil required for lubrication, when oil is used as the hydraulic means.
- the oil supply pressure of the hydraulic valve lash compensation element and the oil pressure for splash lubrication are kept adequately high by means of the long seal gap of the labyrinth seal.
- the arm can be provided in its bearing bore with a roller bearing, with which it is supported in a pivoting manner on the hollow axis.
- the valve friction can be reduced measurably by a roller bearing at the rocker arm or swing arm axis, for example by approximately 15 to 20 percent.
- the arm can also optionally be equipped with a mechanical rocker arm insert or a mechanical rocker arm adjusting screw.
- roller bearing is chiefly implemented in a double row design, so that oil transfer from the rocker arm or swing arm axis to the hydraulic rocker arm insert or to the mechanical rocker arm insert or rocker arm adjusting screw is always ensured.
- the roller bearing can be provided with a cage guiding the rollers, in the center of which is located at least one transfer opening for hydraulic means connected to the radial opening of the axis.
- possible alignment errors of the bearing bore with respect to the rocker arm or swing arm axis are compensated by a double-row design of the roller bearing.
- roller bearings for supporting rocker arms or swing arms without impairing the function of the hydraulic valve lash compensation element or the lubrication of the mechanical rocker arm insert or mechanical rocker arm adjusting screw.
- FIG. 1 a rocker arm according to the invention in longitudinal cross-section
- FIG. 2 a perspective view of the rocker arm
- FIG. 3 a perspective view of a portion of the rocker arm cut away along the longitudinal axis of the bearing bore
- FIGS. 4-7 partial longitudinal cross-sectional views of a rocker arm with installed valve lash compensation element and of a swing arm, as well as a representation of the contact region of the compensating element with one end of a valve tappet, according to the prior art;
- FIG. 8 a longitudinal cross-section of a valve train installed in an internal combustion engine with a rocker arm, according to the prior art.
- FIGS. 4 through 7 show arms 1 of the type mentioned at the outset.
- the arm 1 is a rocker arm, while in FIGS. 5 and 6 , the arm 1 is a swing arm.
- Each arm 1 has a bearing bore 2 with which it surrounds an axis 3 so as to be supported in a pivoting manner. This bearing is implemented as a plain bearing.
- the axis 3 has a supply line 6 for hydraulic means.
- a hydraulic valve lash compensation element 5 is located in the region of one end 4 of the arm 1 .
- the contact region 9 of said valve lash compensation element sits on one end 10 of the tappet 11 of a gas exchange valve.
- a first radial bore 7 extends from the supply line 6 of the axis 3 for delivering the hydraulic means to the valve lash compensation element 5 .
- a second radial bore 8 is located in the axis 3 for splash lubrication of the contact region 9 .
- a path 12 is used to transport hydraulic means to the valve lash compensation element 5
- another path 13 is used for splash application to the contact region 9 .
- a valve train 14 shown in FIG. 8 is built into an internal combustion engine 15 with a hydraulic valve lash compensation element 16 , which is designed as a cylindrical cam follower and can be displaced at one axial end by the cam 17 of a camshaft. At its other axial end, the cam follower has a contact surface 18 on which the bottom end 19 of a valve lifter 20 rests. The displacement of the cam follower caused by the cam 17 is transmitted by the valve lifter 20 at its top end to an end region of a rocker arm 21 .
- the arm 21 In its center region, the arm 21 is supported on a hollow axis 23 by a bearing bore 22 so that it can pivot about the axis 23 .
- the axis 23 is fixed in position in the cylinder head of the internal combustion engine 15 .
- the support of the rocker arm 21 is implemented as a plain bearing.
- the rocker arm 21 At its other end facing away from the valve lifter 20 , the rocker arm 21 acts on the tappet 24 of a gas exchange valve.
- a hydraulic means is directed out of the concentric bore of the hollow axis 23 through a supply line arranged in the rocker arm 21 and through a supply line 25 arranged in the valve lifter 20 into the valve lash compensation element 16 .
- the arm 26 according to the invention shown in FIGS. 1 to 3 is implemented as a rocker arm and has a bearing bore 27 in its center region.
- An inserted hydraulic valve lash compensation element 28 is located at one end of the arm 26 , while the other end is provided with a mechanical arm insert 29 .
- a cage 30 of a roller bearing 31 with rollers 32 implemented as needles is inserted in the bearing bore 27 .
- a supply line 33 is arranged in the arm 26 for delivering oil as hydraulic means from the hollow axis surrounded by the cage 30 to the valve lash compensation element 28 .
- the oil flows from the hollow axis through its radial opening and at least one transfer opening 34 of the cage 30 .
- the space of the bearing bore 27 of the arm 26 in which the roller bearing 31 is located is sealed with a labyrinth seal 35 at each axial end.
- This seal is placed on the arm 26 and encloses the hollow axis in a non-contacting manner.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
- The invention concerns a rocker arm or swing arm in a valve train of an internal combustion engine that has a bearing bore by means of which the arm is supported in a pivoting manner on a hollow axis located in a fixed position in the engine.
- Known from the document DE-OS 198 44 202 is a valve train of an internal combustion engine with a rocker arm, one end of which acts on the tappet of a gas exchange valve and the other end of which is supported on the cam of a camshaft with the interposition of a hydraulic valve lash compensation element. In its center region, the rocker arm has a bearing bore with which it is supported in a pivoting manner on an axis located in a fixed position. This bearing is a plain bearing. Consequently, without roller bearing support of the arm on the arm axis, a potential for reducing friction goes unused here.
- Document DE-OS 197 41 078 shows rocker arms or swing arms of the type mentioned at the outset for the valve train of an internal combustion engine, with a hydraulic valve lash compensation element. Here too, the bearing support of an arm on the fixed axis in the engine is implemented not as a roller bearing but as a plain bearing, so that a potential for reducing friction that could be achieved with a roller bearing goes unused.
- The object of the invention is to laterally seal the rocker arm or swing arm to its bearing bore without the friction that arises in operation being increased thereby.
- This object is attained according to the invention by the means that a labyrinth seal surrounding the hollow axis without contact is arranged on the arm at each axial end of the bearing bore, by which means the bearing space of the arm is sealed laterally. The leakage from the arm is significantly reduced by the long seal gap in the labyrinth.
- The valve train can have a camshaft with cams for producing the pivoting motion of the arm, with a hydraulic valve lash compensation element that is connected to the arm and that acts on the tappet of a gas exchange valve, wherein a supply line is arranged in the arm, and a radial opening connecting the hollow interior space of the axis to the supply line is arranged in the axis in the region of the arm, in order to deliver hydraulic means through the hollow axis to the valve lash compensation element.
- If the rocker arm or swing arm is equipped with a hydraulic valve lash compensation element, it is necessary to ensure that a sufficient fluid pressure is maintained in supplying the compensation element with hydraulic means. This is necessary so that enough oil pressure is present for splash oil required for lubrication, when oil is used as the hydraulic means. The oil supply pressure of the hydraulic valve lash compensation element and the oil pressure for splash lubrication are kept adequately high by means of the long seal gap of the labyrinth seal.
- E105252 [and on all subsequent pages]
- The arm can be provided in its bearing bore with a roller bearing, with which it is supported in a pivoting manner on the hollow axis. The valve friction can be reduced measurably by a roller bearing at the rocker arm or swing arm axis, for example by approximately 15 to 20 percent.
- The arm can also optionally be equipped with a mechanical rocker arm insert or a mechanical rocker arm adjusting screw.
- The roller bearing is chiefly implemented in a double row design, so that oil transfer from the rocker arm or swing arm axis to the hydraulic rocker arm insert or to the mechanical rocker arm insert or rocker arm adjusting screw is always ensured.
- The roller bearing can be provided with a cage guiding the rollers, in the center of which is located at least one transfer opening for hydraulic means connected to the radial opening of the axis. In addition, possible alignment errors of the bearing bore with respect to the rocker arm or swing arm axis are compensated by a double-row design of the roller bearing.
- With the invention, it is possible to use roller bearings for supporting rocker arms or swing arms without impairing the function of the hydraulic valve lash compensation element or the lubrication of the mechanical rocker arm insert or mechanical rocker arm adjusting screw.
- An exemplary embodiment of the invention is represented in the drawings and is described below in detail in comparison with arms for valve trains according to the previously known prior art. Shown are:
-
FIG. 1 a rocker arm according to the invention in longitudinal cross-section; -
FIG. 2 a perspective view of the rocker arm; -
FIG. 3 a perspective view of a portion of the rocker arm cut away along the longitudinal axis of the bearing bore, -
FIGS. 4-7 partial longitudinal cross-sectional views of a rocker arm with installed valve lash compensation element and of a swing arm, as well as a representation of the contact region of the compensating element with one end of a valve tappet, according to the prior art; -
FIG. 8 a longitudinal cross-section of a valve train installed in an internal combustion engine with a rocker arm, according to the prior art. -
FIGS. 4 through 7 show arms 1 of the type mentioned at the outset. InFIG. 4 , thearm 1 is a rocker arm, while inFIGS. 5 and 6 , thearm 1 is a swing arm. Eacharm 1 has abearing bore 2 with which it surrounds anaxis 3 so as to be supported in a pivoting manner. This bearing is implemented as a plain bearing. - The
axis 3 has asupply line 6 for hydraulic means. A hydraulic valvelash compensation element 5 is located in the region of oneend 4 of thearm 1. The contact region 9 of said valve lash compensation element sits on oneend 10 of thetappet 11 of a gas exchange valve. - A first
radial bore 7 extends from thesupply line 6 of theaxis 3 for delivering the hydraulic means to the valvelash compensation element 5. A secondradial bore 8 is located in theaxis 3 for splash lubrication of the contact region 9. In the enclosingarm 1, apath 12 is used to transport hydraulic means to the valvelash compensation element 5, and anotherpath 13 is used for splash application to the contact region 9. - A
valve train 14 shown inFIG. 8 is built into aninternal combustion engine 15 with a hydraulic valvelash compensation element 16, which is designed as a cylindrical cam follower and can be displaced at one axial end by thecam 17 of a camshaft. At its other axial end, the cam follower has acontact surface 18 on which thebottom end 19 of avalve lifter 20 rests. The displacement of the cam follower caused by thecam 17 is transmitted by thevalve lifter 20 at its top end to an end region of arocker arm 21. - In its center region, the
arm 21 is supported on ahollow axis 23 by abearing bore 22 so that it can pivot about theaxis 23. Theaxis 23 is fixed in position in the cylinder head of theinternal combustion engine 15. Here too, the support of therocker arm 21 is implemented as a plain bearing. At its other end facing away from thevalve lifter 20, therocker arm 21 acts on thetappet 24 of a gas exchange valve. A hydraulic means is directed out of the concentric bore of thehollow axis 23 through a supply line arranged in therocker arm 21 and through asupply line 25 arranged in thevalve lifter 20 into the valvelash compensation element 16. - The
arm 26 according to the invention shown inFIGS. 1 to 3 is implemented as a rocker arm and has a bearing bore 27 in its center region. An inserted hydraulic valvelash compensation element 28 is located at one end of thearm 26, while the other end is provided with amechanical arm insert 29. - For pivoting support of the
arm 26 on a fixed hollow axis, acage 30 of a roller bearing 31 withrollers 32 implemented as needles is inserted in thebearing bore 27. Asupply line 33 is arranged in thearm 26 for delivering oil as hydraulic means from the hollow axis surrounded by thecage 30 to the valvelash compensation element 28. In this supply line, the oil flows from the hollow axis through its radial opening and at least one transfer opening 34 of thecage 30. - According to the invention, the space of the bearing bore 27 of the
arm 26 in which the roller bearing 31 is located is sealed with alabyrinth seal 35 at each axial end. This seal is placed on thearm 26 and encloses the hollow axis in a non-contacting manner. - 1 arm
- 2 bearing bore
- 3 axis
- 4 end of arm
- 5 valve lash compensation element
- 6 supply line
- 7 first radial bore
- 8 second radial bore
- 9 contact region
- 10 end of tappet
- 11 tappet
- 12 path
- 13 path
- 14 valve train
- 15 internal combustion engine
- 16 valve lash compensation element
- 17 cam
- 18 contact surface
- 19 bottom end
- 20 valve lifter
- 21 rocker arm
- 22 bearing bore
- 23 axis
- 24 tappet
- 25 supply line
- 26 arm
- 27 bearing bore
- 28 valve lash compensation element
- 29 arm insert
- 30 cage
- 31 roller bearing
- 32 roller
- 33 supply line
- 34 transfer opening
- 35 labyrinth seal
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011003023A DE102011003023A1 (en) | 2011-01-24 | 2011-01-24 | Tilting or rocking lever in a valve train of an internal combustion engine |
DE102011003023.9 | 2011-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120186549A1 true US20120186549A1 (en) | 2012-07-26 |
Family
ID=46510681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/295,458 Abandoned US20120186549A1 (en) | 2011-01-24 | 2011-11-14 | Oscillating lever in a valve train of an internal-combustion engine |
Country Status (3)
Country | Link |
---|---|
US (1) | US20120186549A1 (en) |
CN (1) | CN102606247A (en) |
DE (1) | DE102011003023A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2947307A1 (en) * | 2014-05-23 | 2015-11-25 | Aktiebolaget SKF | Cam follower roller device with integrated sealing elements, notably for a fuel injection pump |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013207577A1 (en) * | 2013-04-25 | 2014-11-13 | Mahle International Gmbh | Arrangement with two camshafts |
CN105179038A (en) * | 2015-10-30 | 2015-12-23 | 绵阳富临精工机械股份有限公司 | Low-rotational-inertia valve rocker |
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 |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
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US3550974A (en) * | 1969-05-26 | 1970-12-29 | Trw Inc | Bearing seal |
US4955462A (en) * | 1989-09-05 | 1990-09-11 | Produits Carmine Inc. | Polymer concrete conveyor roller |
US6062734A (en) * | 1998-02-23 | 2000-05-16 | Skf Sverige Ab | Bearing seal |
USRE36804E (en) * | 1995-02-03 | 2000-08-01 | Koyo Seiko Co., Ltd. | Bearing sealing device and bearing sealing mechanism capable of preventing the leakage of grease |
US6230676B1 (en) * | 1999-04-23 | 2001-05-15 | Toledo Technologies Inc. | Interchangeable rocker arm assembly |
US6422186B1 (en) * | 1999-09-10 | 2002-07-23 | Diesel Engine Retarders, Inc. | Lost motion rocker arm system with integrated compression brake |
US6574076B1 (en) * | 1999-09-14 | 2003-06-03 | Minebea Co., Ltd. | Pivot assembly for driving a magnetic head |
US6786645B2 (en) * | 2001-11-21 | 2004-09-07 | The Timken Company | Mounting for vehicular road wheel |
US20040202393A1 (en) * | 2002-05-22 | 2004-10-14 | Takashi Masui | Self-aligning bearing |
US7263956B2 (en) * | 1999-07-01 | 2007-09-04 | Delphi Technologies, Inc. | Valve lifter assembly for selectively deactivating a cylinder |
US7412952B2 (en) * | 2006-12-08 | 2008-08-19 | Ford Global Technologies, Llc | Poppet valve operating system for internal combustion engine |
US7493879B2 (en) * | 2004-01-30 | 2009-02-24 | Honda Motor Co., Ltd. | Engine valve operating system |
US7614374B2 (en) * | 2004-08-02 | 2009-11-10 | Ntn Corporation | Rolling bearing for rocker arm |
US7707979B2 (en) * | 2006-07-21 | 2010-05-04 | Schaeffler Kg | Valvetrain switchable lever arm for internal combustion engine using collapsing pivot element at center pivot |
US7857320B1 (en) * | 2009-06-03 | 2010-12-28 | Chang Ming S | Bearing isolator seal with floating ring |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19741078A1 (en) | 1997-09-18 | 1999-03-25 | Schaeffler Waelzlager Ohg | Turning or tilting lever for internal combustion engine valve drive |
DE19844202A1 (en) | 1998-09-26 | 2000-03-30 | Schaeffler Waelzlager Ohg | Internal combustion engine valve tappet comprises inner and outer section coupled and decoupled via spring-powered slide in section mountings to maximize or zero gas valve stroke |
US6755167B2 (en) * | 2002-02-26 | 2004-06-29 | Delphi Technologies, Inc. | Two-step roller finger cam follower having spool-shaped low-lift roller |
US7753017B2 (en) * | 2007-12-20 | 2010-07-13 | Gm Global Technology Operations, Inc. | Hydraulically lashed end pivot rocker arm |
-
2011
- 2011-01-24 DE DE102011003023A patent/DE102011003023A1/en not_active Withdrawn
- 2011-11-14 US US13/295,458 patent/US20120186549A1/en not_active Abandoned
-
2012
- 2012-01-19 CN CN2012100176194A patent/CN102606247A/en active Pending
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3550974A (en) * | 1969-05-26 | 1970-12-29 | Trw Inc | Bearing seal |
US4955462A (en) * | 1989-09-05 | 1990-09-11 | Produits Carmine Inc. | Polymer concrete conveyor roller |
USRE36804E (en) * | 1995-02-03 | 2000-08-01 | Koyo Seiko Co., Ltd. | Bearing sealing device and bearing sealing mechanism capable of preventing the leakage of grease |
US6062734A (en) * | 1998-02-23 | 2000-05-16 | Skf Sverige Ab | Bearing seal |
US6230676B1 (en) * | 1999-04-23 | 2001-05-15 | Toledo Technologies Inc. | Interchangeable rocker arm assembly |
US7263956B2 (en) * | 1999-07-01 | 2007-09-04 | Delphi Technologies, Inc. | Valve lifter assembly for selectively deactivating a cylinder |
US6422186B1 (en) * | 1999-09-10 | 2002-07-23 | Diesel Engine Retarders, Inc. | Lost motion rocker arm system with integrated compression brake |
US6574076B1 (en) * | 1999-09-14 | 2003-06-03 | Minebea Co., Ltd. | Pivot assembly for driving a magnetic head |
US6786645B2 (en) * | 2001-11-21 | 2004-09-07 | The Timken Company | Mounting for vehicular road wheel |
US20040202393A1 (en) * | 2002-05-22 | 2004-10-14 | Takashi Masui | Self-aligning bearing |
US7493879B2 (en) * | 2004-01-30 | 2009-02-24 | Honda Motor Co., Ltd. | Engine valve operating system |
US7614374B2 (en) * | 2004-08-02 | 2009-11-10 | Ntn Corporation | Rolling bearing for rocker arm |
US7707979B2 (en) * | 2006-07-21 | 2010-05-04 | Schaeffler Kg | Valvetrain switchable lever arm for internal combustion engine using collapsing pivot element at center pivot |
US7412952B2 (en) * | 2006-12-08 | 2008-08-19 | Ford Global Technologies, Llc | Poppet valve operating system for internal combustion engine |
US7857320B1 (en) * | 2009-06-03 | 2010-12-28 | Chang Ming S | Bearing isolator seal with floating ring |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2947307A1 (en) * | 2014-05-23 | 2015-11-25 | Aktiebolaget SKF | Cam follower roller device with integrated sealing elements, notably for a fuel injection pump |
Also Published As
Publication number | Publication date |
---|---|
DE102011003023A1 (en) | 2012-07-26 |
CN102606247A (en) | 2012-07-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHNELL, OLIVER;WITTER, OLIVER;REEL/FRAME:027635/0138 Effective date: 20111201 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
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