US20130000573A1 - Hydraulic valve play compensating element for reciprocating-piston internal combustion engines - Google Patents
Hydraulic valve play compensating element for reciprocating-piston internal combustion engines Download PDFInfo
- Publication number
- US20130000573A1 US20130000573A1 US13/583,953 US201113583953A US2013000573A1 US 20130000573 A1 US20130000573 A1 US 20130000573A1 US 201113583953 A US201113583953 A US 201113583953A US 2013000573 A1 US2013000573 A1 US 2013000573A1
- Authority
- US
- United States
- Prior art keywords
- valve
- intake
- cylinder
- working piston
- internal combustion
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—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
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
-
- 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
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
-
- 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
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/03—Auxiliary actuators
- F01L2820/032—Electric motors
Definitions
- Reciprocating piston internal combustion engines with hydraulic valve lash adjusting elements of the generic type are well known.
- a problem of such engines is that, depending on the speed of rotation of the reciprocating piston, internal combustion engine and the lift height of the cams, the high pressure chamber of the valve lash adjusting elements is not capable of being sufficiently filled, so that a sinking of the hydraulic valve lash adjusting element can occur and this leads to enhanced or impermissibly large lash in the valve train.
- the hydraulic valve lash adjusting element gets excessively pumped up, so that valve lash falls short of the permissible value.
- valve closing body comprises a partial spherical surface in the region of the valve seat and that the ratio of the diameter of the working piston ( 8 ) to twice the radius of the partial spherical surface ( 13 ) is ⁇ 2.
- valve seat or the valve closing body, possesses a large opening in the region of the valve seat without the overall dimensions of the valve closing body being disproportionately large. This enables an adequate and rapid filling of the high pressure chamber, so that a sinking of the hydraulic valve lash adjusting element is prevented and this, even when additional lobes on the cam shorten the filling time considerably.
- the valve closing body Adjoining the partial spherical surface, the valve closing body comprises a cylindrical peripheral surface starting from the edge of the spherical surface.
- the valve closing body has a light weight which, in contrast to usual valve closing bodies configured as balls, manifests a considerably smaller mass although the valve seat has a large diameter.
- the valve closing body comprises following the cylindrical peripheral surface, a peg and this peg is surrounded by a valve closing spring that is further supported in an opening of a valve cap. In this way, an additional guidance is created for the valve closing body.
- a bore preferably a stepped bore is arranged adjoining the opening in the valve cap, so that the high pressure chamber can get filled even along the valve closing spring, the peg and the stepped bore.
- a pocket hole is arranged in the region of the partial spherical surface on the end of the valve closing body turned away from the peg.
- This pocket bore is a further contribution to a reduction of the mass of the valve closing body and an enlargement of the oil reservoir.
- the pocket hole also serves as a collecting pocket for contaminants in the oil.
- the radius of the closing spherical surface is larger than or equal to 2.5 mm.
- valve seat diameter is larger than or equal to 5.0 mm, and the diameter of the valve closing body is larger than or equal to 7.5 mm. This assures a complete filling of the high pressure chamber even in the presence of intermediate lobes in the region of the base circle of the cams.
- valve cap is advantageously configured with a stepped inner diameter, and the large diameter surrounds the outer peripheral surface of the valve closing body, while the smaller diameter surrounds the valve closing spring.
- Beads and openings are arranged on the valve cap in the region of the large diameter and extend from the high pressure chamber to the valve seat in order to assure an adequate and rapid filling of the high pressure chamber.
- FIG. 1 shows a section through a rocker arm configured as a transmission element comprising a hydraulic valve lash adjusting element that is connected through a roller with a cam of a camshaft, and
- FIG. 2 shows a section through the hydraulic valve lash adjusting element on an enlarged scale.
- a rocker arm pivotally mounted on a rocker arm axle 2 is identified at 1 .
- the rocker arm 1 is operatively connected through a roller 3 to a cam 4 of a reciprocating piston internal combustion engine.
- the cam is a component part of a camshaft that is designed for use in a reciprocating piston internal combustion engine for a utility vehicle and/or a passenger vehicle.
- a hydraulic valve lash adjusting element generally identified at 5 that is supplied through a channel with oil from the reciprocating piston internal combustion engine and/or another oil supply unit.
- the hydraulic valve lash adjusting element 5 comprises a cylindrical housing 7 that is guided for sliding in the rocker arm 1 .
- a working piston 8 whose outward movement in the cylindrical housing 7 is limited by a spring ring.
- the working piston 8 is supported, as shown in FIG. 1 , on an end plate 9 that is fixed in the rocker arm 1 .
- a hollow space configured within the working piston 8 to serve as a reservoir 10 for oil is adjoined by a valve seat 11 to which a valve closing body 12 is associated.
- the valve closing body 12 comprises a partial spherical surface 13 that merges into a cylindrical peripheral surface 14 .
- Adjoining the cylindrical peripheral surface 14 is integrally formed on the valve closing body 12 , a peg 15 that is surrounded by a valve closing spring 16 .
- the valve closing spring 16 is further supported on a valve cap 17 that is firmly installed in the working piston, for example, by pressing.
- a resetting spring 18 is arranged between the valve cap 17 and the cylindrical housing 7 to bias the working piston away from the cylindrical housing 7 .
- the space around the resetting spring 18 is configured as a high pressure chamber 19 that is controlled by the valve closing body 12 that prevents a compression of the high pressure chamber.
- beads 20 and openings 21 that assure a rapid filling of the high pressure chamber 19 out of the reservoir 10 .
- a pocket hole 22 Through which the mass of the valve closing body is reduced, the reservoir 10 at the same time enlarged and a collecting pocket formed in which contaminants of the oil can get deposited.
- the ratio of the diameter of the working piston to the diameter of the valve closing body which is normally configured as a ball, is situated above a value of 3 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
- A reciprocating piston internal combustion engine working with the four stroke method and comprising a crankcase and at least one cylinder arranged in said crankcase, in which cylinder a piston is guided by a crankshaft, said engine further comprising at least one cylinder head closing said cylinder, inlet and outlet channels of said cylinder head being controlled in each case by at least one inlet and outlet valve loaded by a valve spring, said inlet and outlet valves being actuated by transmission elements driven by a camshaft, said engine further comprising a hydraulic valve lash adjusting element which is installed in at least one of said transmission elements or in a component which is installed in the transmission element between the camshaft and at least one inlet and/or outlet valve, said engine further comprising a hydraulic valve lash adjusting element comprising a working piston, a cylinder housing interacting with said working piston, a resetting spring arranged in between, and a non-return valve which delimits a high pressure chamber, and a valve closing body of said non-return valve corresponding to a valve seat on said working piston.
- Reciprocating piston internal combustion engines with hydraulic valve lash adjusting elements of the generic type are well known. A problem of such engines is that, depending on the speed of rotation of the reciprocating piston, internal combustion engine and the lift height of the cams, the high pressure chamber of the valve lash adjusting elements is not capable of being sufficiently filled, so that a sinking of the hydraulic valve lash adjusting element can occur and this leads to enhanced or impermissibly large lash in the valve train. On the other hand, it is also possible that the hydraulic valve lash adjusting element gets excessively pumped up, so that valve lash falls short of the permissible value.
- It is known, see DE 10 2007 014 248 A1, to provide stop and clamping devices on the hydraulic valve lash adjusting element that are externally activated and prevent both a pumping-up as also a sinking of the hydraulic valve lash adjusting element. Stop and clamping devices of this type are structurally very complex and cost intensive.
- The problems are of particular importance when, in addition to the hydraulic valve lash adjusting elements, brake control devices or exhaust gas return devices are also used on the reciprocating piston internal combustion engine with provision of additional cam lobes in the region of the base circle of the cams.
- It is therefore an object of the invention to eliminate the drawbacks of the aforesaid measures on hydraulic valve lash adjusting elements particularly with the aim that, both during normal operation, particularly in the case of large engines for utility vehicles, as also during operations with additional opening of the gas exchange valves for decompression or exhaust gas return purposes, no sinking of the hydraulic valve lash adjusting elements occurs. This should be achieved using simple means.
- The invention achieves the above object by the fact that the valve closing body comprises a partial spherical surface in the region of the valve seat and that the ratio of the diameter of the working piston (8) to twice the radius of the partial spherical surface (13) is ≦2.
- In this way, it is achieved that the valve seat, or the valve closing body, possesses a large opening in the region of the valve seat without the overall dimensions of the valve closing body being disproportionately large. This enables an adequate and rapid filling of the high pressure chamber, so that a sinking of the hydraulic valve lash adjusting element is prevented and this, even when additional lobes on the cam shorten the filling time considerably.
- Adjoining the partial spherical surface, the valve closing body comprises a cylindrical peripheral surface starting from the edge of the spherical surface. Through this measure, the valve closing body has a light weight which, in contrast to usual valve closing bodies configured as balls, manifests a considerably smaller mass although the valve seat has a large diameter.
- According to a further development of the invention, the valve closing body comprises following the cylindrical peripheral surface, a peg and this peg is surrounded by a valve closing spring that is further supported in an opening of a valve cap. In this way, an additional guidance is created for the valve closing body.
- As proposed by the invention, a bore, preferably a stepped bore is arranged adjoining the opening in the valve cap, so that the high pressure chamber can get filled even along the valve closing spring, the peg and the stepped bore.
- According to a further proposition of the invention, a pocket hole is arranged in the region of the partial spherical surface on the end of the valve closing body turned away from the peg. This pocket bore is a further contribution to a reduction of the mass of the valve closing body and an enlargement of the oil reservoir. The pocket hole also serves as a collecting pocket for contaminants in the oil.
- In a further development of the invention, the radius of the closing spherical surface is larger than or equal to 2.5 mm.
- In this case, the valve seat diameter is larger than or equal to 5.0 mm, and the diameter of the valve closing body is larger than or equal to 7.5 mm. This assures a complete filling of the high pressure chamber even in the presence of intermediate lobes in the region of the base circle of the cams.
- This is based on the fact that the diameter of the working piston and that of the opening cross-section of the non-return valve are of special importance for the mode of functioning of the hydraulic valve lash adjusting element.
- The valve cap is advantageously configured with a stepped inner diameter, and the large diameter surrounds the outer peripheral surface of the valve closing body, while the smaller diameter surrounds the valve closing spring.
- Beads and openings are arranged on the valve cap in the region of the large diameter and extend from the high pressure chamber to the valve seat in order to assure an adequate and rapid filling of the high pressure chamber.
- For a further elucidation of the invention reference will be made to the appended drawings in which one example of embodiment is shown in simplified illustrations.
-
FIG. 1 shows a section through a rocker arm configured as a transmission element comprising a hydraulic valve lash adjusting element that is connected through a roller with a cam of a camshaft, and -
FIG. 2 shows a section through the hydraulic valve lash adjusting element on an enlarged scale. - As far as specifically illustrated in
FIGS. 1 and 2 , a rocker arm pivotally mounted on arocker arm axle 2 is identified at 1. The rocker arm 1 is operatively connected through aroller 3 to acam 4 of a reciprocating piston internal combustion engine. The cam is a component part of a camshaft that is designed for use in a reciprocating piston internal combustion engine for a utility vehicle and/or a passenger vehicle. - On the free end of the rocker arm 1 is installed a hydraulic valve lash adjusting element generally identified at 5 that is supplied through a channel with oil from the reciprocating piston internal combustion engine and/or another oil supply unit.
- The hydraulic valve
lash adjusting element 5 comprises a cylindrical housing 7 that is guided for sliding in the rocker arm 1. Within the cylindrical housing 7 is installed a workingpiston 8 whose outward movement in the cylindrical housing 7 is limited by a spring ring. The workingpiston 8 is supported, as shown inFIG. 1 , on anend plate 9 that is fixed in the rocker arm 1. A hollow space configured within the workingpiston 8 to serve as areservoir 10 for oil is adjoined by avalve seat 11 to which avalve closing body 12 is associated. Thevalve closing body 12 comprises a partialspherical surface 13 that merges into a cylindricalperipheral surface 14. Adjoining the cylindricalperipheral surface 14 is integrally formed on thevalve closing body 12, apeg 15 that is surrounded by avalve closing spring 16. Thevalve closing spring 16 is further supported on avalve cap 17 that is firmly installed in the working piston, for example, by pressing. A resettingspring 18 is arranged between thevalve cap 17 and the cylindrical housing 7 to bias the working piston away from the cylindrical housing 7. The space around the resettingspring 18 is configured as ahigh pressure chamber 19 that is controlled by thevalve closing body 12 that prevents a compression of the high pressure chamber. In the wall of thevalve cap 17 surrounding thevalve closing body 12 are arrangedbeads 20 andopenings 21 that assure a rapid filling of thehigh pressure chamber 19 out of thereservoir 10. - On the end of the
valve closing body 12 turned away from thepeg 15 is configured apocket hole 22 through which the mass of the valve closing body is reduced, thereservoir 10 at the same time enlarged and a collecting pocket formed in which contaminants of the oil can get deposited. - Finally, it may be pointed out once again that, normally, the ratio of the diameter of the working piston to the diameter of the valve closing body, which is normally configured as a ball, is situated above a value of 3. In the present case, the ratio for a constant diameter of the working piston and a radius of the partial spherical surface of r=4 is ≦2.
-
- 1 Rocker arm
- 2 Rocker arm axle
- 3 Roller
- 4 Cam
- 5 Hydraulic valve lash adjusting element
- 6 Channel
- 7 Cylindrical housing
- 8 Working piston
- 9 End plate
- 10 Reservoir
- 11 Valve seat
- 12 Valve closing body
- 13 Partial spherical surface
- 14 Cylindrical peripheral surface
- 15 Peg
- 16 Valve closing spring
- 17 Valve cap
- 18 Resetting spring
- 19 High pressure chamber
- 20 Beads
- 21 Openings
- 22 Pocket hole
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010018208A DE102010018208A1 (en) | 2010-04-26 | 2010-04-26 | Hydraulic valve clearance compensation element for reciprocating internal combustion engines |
DE102010018208.7 | 2010-04-26 | ||
PCT/EP2011/055753 WO2011134790A2 (en) | 2010-04-26 | 2011-04-13 | Hydraulic valve play compensating element for reciprocating-piston internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130000573A1 true US20130000573A1 (en) | 2013-01-03 |
Family
ID=44544232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/583,953 Abandoned US20130000573A1 (en) | 2010-04-26 | 2011-04-13 | Hydraulic valve play compensating element for reciprocating-piston internal combustion engines |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130000573A1 (en) |
EP (1) | EP2564038B1 (en) |
DE (1) | DE102010018208A1 (en) |
WO (1) | WO2011134790A2 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150122220A1 (en) * | 2012-07-05 | 2015-05-07 | Eaton Srl | Hydraulic lash adjuster |
CN106884694A (en) * | 2015-10-22 | 2017-06-23 | 舍弗勒技术股份两合公司 | Flat bottom or roller tappet for reciprocating piston internal combustion engine |
US10119430B2 (en) | 2015-06-17 | 2018-11-06 | Schaeffler Technologies AG & Co. KG | Transmission element for reciprocating piston internal combustion engines |
US10526926B2 (en) | 2015-05-18 | 2020-01-07 | Eaton Srl | Rocker arm having oil release valve that operates as an accumulator |
CN111720184A (en) * | 2020-06-29 | 2020-09-29 | 杭州新坐标科技股份有限公司 | Plane hydraulic support piece for large engine |
CN114364862A (en) * | 2019-09-20 | 2022-04-15 | 卡特彼勒公司 | Rocker assembly with hydraulic lash adjuster |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015216291B3 (en) | 2015-08-26 | 2016-11-03 | Schaeffler Technologies AG & Co. KG | Hydraulic compensating element of a valve train |
CN105736086B (en) * | 2016-02-02 | 2018-06-29 | 吉林大学 | The engine braking methods and decompressor that burning braking is combined with pressure m |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1916191A (en) * | 1931-11-27 | 1933-07-04 | Gen Motors Corp | Zero lash valve lifter |
US2682864A (en) * | 1952-05-08 | 1954-07-06 | Voorhies Carl | Valve lifter |
USRE24633E (en) * | 1959-04-14 | Voorhies | ||
US3014472A (en) * | 1960-06-13 | 1961-12-26 | Bendix Corp | Hydraulic valve tappet |
US3124114A (en) * | 1964-03-10 | Voorhies | ||
US3140698A (en) * | 1962-04-13 | 1964-07-14 | Voorhies Carl | Hydraulic tappet unit inverted |
US4530319A (en) * | 1982-07-30 | 1985-07-23 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulic lash adjustor in a valve operating mechanism |
US6460499B1 (en) * | 2001-01-16 | 2002-10-08 | Tecumseh Products Company | Hydraulic lifter assembly |
US20050229887A1 (en) * | 2004-04-16 | 2005-10-20 | Peter Sailer | Hydraulic valve-lash-adjusting element |
US20070272185A1 (en) * | 2006-05-24 | 2007-11-29 | Schaeffler Kg | Hydraulic lash adjuster for an internal combustion engine |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2339238A (en) * | 1942-03-09 | 1944-01-18 | Buckley Arthur Burton | Valve tappet |
US4164917A (en) * | 1977-08-16 | 1979-08-21 | Cummins Engine Company, Inc. | Controllable valve tappet for use with dual ramp cam |
US4407241A (en) * | 1980-12-31 | 1983-10-04 | Cummins Engine Company, Inc. | Expandable hydraulic tappet with a variable exit valve |
US4462364A (en) * | 1981-09-17 | 1984-07-31 | Aisin Seiki Kabushiki Kaisha | Hydraulic lash adjuster |
DE4102537A1 (en) * | 1991-01-29 | 1992-07-30 | Man Nutzfahrzeuge Ag | EXHAUST VALVE TUNEL FOR AN INTERNAL COMBUSTION ENGINE |
US5088458A (en) * | 1991-02-01 | 1992-02-18 | Siemens Automotive L.P. | Lash adjusted for engine valve actuator assembly |
DE19818893A1 (en) * | 1998-04-28 | 1999-11-04 | Mwp Mahle J Wizemann Pleuco Gm | Hydraulic valve lash adjuster |
DE102004053203A1 (en) * | 2004-11-04 | 2006-06-01 | Schaeffler Kg | Variable valve train of an internal combustion engine |
DE102007014248A1 (en) | 2007-03-24 | 2008-09-25 | Schaeffler Kg | Reciprocating internal combustion engine with engine braking device |
-
2010
- 2010-04-26 DE DE102010018208A patent/DE102010018208A1/en not_active Withdrawn
-
2011
- 2011-04-13 WO PCT/EP2011/055753 patent/WO2011134790A2/en active Application Filing
- 2011-04-13 US US13/583,953 patent/US20130000573A1/en not_active Abandoned
- 2011-04-13 EP EP11715902.0A patent/EP2564038B1/en active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE24633E (en) * | 1959-04-14 | Voorhies | ||
US3124114A (en) * | 1964-03-10 | Voorhies | ||
US1916191A (en) * | 1931-11-27 | 1933-07-04 | Gen Motors Corp | Zero lash valve lifter |
US2682864A (en) * | 1952-05-08 | 1954-07-06 | Voorhies Carl | Valve lifter |
US3014472A (en) * | 1960-06-13 | 1961-12-26 | Bendix Corp | Hydraulic valve tappet |
US3140698A (en) * | 1962-04-13 | 1964-07-14 | Voorhies Carl | Hydraulic tappet unit inverted |
US4530319A (en) * | 1982-07-30 | 1985-07-23 | Honda Giken Kogyo Kabushiki Kaisha | Hydraulic lash adjustor in a valve operating mechanism |
US6460499B1 (en) * | 2001-01-16 | 2002-10-08 | Tecumseh Products Company | Hydraulic lifter assembly |
US20050229887A1 (en) * | 2004-04-16 | 2005-10-20 | Peter Sailer | Hydraulic valve-lash-adjusting element |
US7146954B2 (en) * | 2004-04-16 | 2006-12-12 | Ina-Schaeffler Kg | Hydraulic valve-lash-adjusting element |
US20070272185A1 (en) * | 2006-05-24 | 2007-11-29 | Schaeffler Kg | Hydraulic lash adjuster for an internal combustion engine |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150122220A1 (en) * | 2012-07-05 | 2015-05-07 | Eaton Srl | Hydraulic lash adjuster |
US10294828B2 (en) * | 2012-07-05 | 2019-05-21 | Eaton Intelligent Power Limited | Hydraulic lash adjuster |
US10526926B2 (en) | 2015-05-18 | 2020-01-07 | Eaton Srl | Rocker arm having oil release valve that operates as an accumulator |
US10119430B2 (en) | 2015-06-17 | 2018-11-06 | Schaeffler Technologies AG & Co. KG | Transmission element for reciprocating piston internal combustion engines |
CN106884694A (en) * | 2015-10-22 | 2017-06-23 | 舍弗勒技术股份两合公司 | Flat bottom or roller tappet for reciprocating piston internal combustion engine |
CN114364862A (en) * | 2019-09-20 | 2022-04-15 | 卡特彼勒公司 | Rocker assembly with hydraulic lash adjuster |
CN111720184A (en) * | 2020-06-29 | 2020-09-29 | 杭州新坐标科技股份有限公司 | Plane hydraulic support piece for large engine |
Also Published As
Publication number | Publication date |
---|---|
EP2564038A2 (en) | 2013-03-06 |
WO2011134790A2 (en) | 2011-11-03 |
EP2564038B1 (en) | 2014-09-17 |
WO2011134790A3 (en) | 2012-03-15 |
DE102010018208A1 (en) | 2011-10-27 |
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