EP1119689A1 - Valve train assembly - Google Patents
Valve train assemblyInfo
- Publication number
- EP1119689A1 EP1119689A1 EP99970148A EP99970148A EP1119689A1 EP 1119689 A1 EP1119689 A1 EP 1119689A1 EP 99970148 A EP99970148 A EP 99970148A EP 99970148 A EP99970148 A EP 99970148A EP 1119689 A1 EP1119689 A1 EP 1119689A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rocker arm
- assembly
- fulcrum
- rocker
- carrier
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
-
- 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
- F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
-
- 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
- F01L1/185—Overhead end-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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L2001/0537—Double overhead camshafts [DOHC]
-
- 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
- F01L2001/187—Clips, e.g. for retaining rocker arm on pivot
-
- 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
- F01L2001/188—Fulcrums at upper surface
-
- 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 present invention relates to a valve train assembly for an internal
- rocker arms which are mounted on a common pivot or axle and which
- combustion engine comprises a valve train carrier having a plurality of
- carrier may also have one or more camshafts mounted thereto.
- Such an arrangement can be provided as a pre-assembled unit for
- Each fulcrum may form part of a hydraulic lash adjuster. Accordingly,
- associated fulcrum have co-operating part-spherical surfaces which permit not
- the rocker arm has a part-spherical recess into which a
- arm may be attached to the projection by means of a clip, possibly made of
- the rockers are made of pressed sheet metal (with the final
- rocker a roller with a wide surface which is flat in a direction parallel to the
- the camshaft need not be so strong, and indeed it is possible to
- rockers can be substantially identical, thereby reducing manufacturing costs. .Arrangements embodying the invention will now be described by way
- Fig. 1 is a side view of a prior art rocker arm
- Fig. 2 is a side view, partly in section, of a rocker arm arrangement
- Fig. 3 is a side view of the rocker arm of Figure 2;
- Fig. 4 is a plan view of the rocker arm shown in Fig. 3;
- Fig. 5 is a section along the line V-V of Fig. 3;
- Fig. 6 shows is a section along the line VI-VI in Fig. 3;
- Fig. 7 is a section through a hydraulic tappet forming a fulcrum of the
- Fig. 8 is a transverse section showing a valve train carrier of the
- Fig. 9 is a plan view of the valve train carrier as shown in Fig. 7;
- Fig. 10 is a side view showing another embodiment of a valve train
- Fig. 11 is a perspective view, from below, of a valve train carrier of
- Fig. 1 shows a prior art rocker (B) made of pressed aluminium
- rocker (B) carries other rockers arranged in a row.
- One end of the rocker (B) is in contact with a cam (C) by means of a roller (R'), while the other end has a
- the tappet has a spigot or projection (81) at the base acting on the head
- a double row of camshafts (A') acts on convex surfaces of
- Fig. 2 shows an example of a rocker arm arrangement according to the
- the rocker (B) of the present invention is again a lever of the first
- rocker (B) is a centre-pivoted rocker arm.
- rocker (B) is a centre-pivoted rocker arm.
- V valve (V) against the resilient force of a spring (M).
- the rocker (B) shown in Figs. 3 to 6 is made up of two lateral flanges
- the tappet (4) is fitted in its own fixed seat (45, Fig. 7)
- rocker arm can rotate about an axis X (Fig. 4) and about the
- Rocker (B) comprises at one end a transverse opening (15) into which
- a pivoting trunnion (16) is fitted, the trunnion (16) having opposing recesses
- (B) of the valve shaft which may vary depending on the type of engine.
- roller (R) having needle bearings and located
- Roller (R) is very simple, with a straight cylindrical outside surface
- a resilient sheet (25) is used with flanges (26) folded back on themselves so that the lower section can be attached to the rocker flanges (see
- the resilient sheet has an inlet (27) at the top for the purpose of
- the sheet (30) may be
- the projection or spigot (42) has a relatively
- the aperture is elongate, with its longitudinal axis extended
- cam shaft and valve cam shaft and valve.
- alternative arrangements are possible.
- the rocker arm could be fastened to the head (41) by means of a rivet
- the head (41) possibly engaging therein by means of a screw thread or by a resilient enlarged portion which engages in an annular ridge within the recess.
- fulcrum be fairly loose, and arranged so as not to inhibit the intended
- Fig. 7 is a detailed view of the tappet (4), which keeps rocker (B)
- fulcrum forms a plunger which is attached to a chamber (43) which slides in a
- the oil is supplied through the inlet (50) and
- Inlets (46) and (46') are provided in the spigot (42) for the purpose of
- engine cylinder head has a lower head part (80) into which the valves (VI) and (V2) are installed. Their springs (M) are located in recesses (60) of the
- valve train carrier formed by the cover (L)
- one version may have hydraulic lash adjusters
- rocker arms provided with rollers, and another, less-expensive one may
- the camshaft is also fitted to the cover (L) during pre-
- A2) are also preferably mounted to the carrier (L) before the entire assembly
- the carriers (L) of either embodiment may have channels for
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)
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI982136 | 1998-10-05 | ||
IT1998MI002136A IT1302601B1 (en) | 1998-10-05 | 1998-10-05 | ROCKER EQUIPPED WITH HYDRAULIC ELEMENT IN THE BELL FOR A VALVE VALVE TRAIN. |
PCT/IB1999/001699 WO2000020730A1 (en) | 1998-10-05 | 1999-10-05 | Valve train assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1119689A1 true EP1119689A1 (en) | 2001-08-01 |
EP1119689B1 EP1119689B1 (en) | 2004-01-21 |
EP1119689B2 EP1119689B2 (en) | 2010-04-07 |
Family
ID=11380809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99970148A Expired - Lifetime EP1119689B2 (en) | 1998-10-05 | 1999-10-05 | Valve train assembly |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1119689B2 (en) |
JP (1) | JP4558938B2 (en) |
AT (1) | ATE258271T1 (en) |
BR (1) | BR9914635A (en) |
DE (1) | DE69914348T3 (en) |
IT (1) | IT1302601B1 (en) |
WO (1) | WO2000020730A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2233704A1 (en) * | 2009-03-10 | 2010-09-29 | Schaeffler Technologies AG & Co. KG | Rocker arm holder for a valve drive of a combustion engine |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10041466B4 (en) * | 2000-08-23 | 2008-10-09 | Man Diesel Se | Valve drive for gas exchange valves of an internal combustion engine |
FR2821891B1 (en) * | 2001-03-09 | 2003-05-23 | Renault | THERMAL ENGINE CYLINDER HEAD COMPRISING AN UPPER ELEMENT, FORMING CYLINDER COVER, WHICH CARRIES THE CAMSHAFT |
DE60318836T2 (en) * | 2003-07-23 | 2009-01-22 | Eaton S.R.L., Rivarolo Canavese | Metal clamp for rocker arm |
DE10340944A1 (en) * | 2003-09-05 | 2005-04-28 | Ina Schaeffler Kg | valve train |
DE102004005831A1 (en) * | 2004-02-06 | 2005-08-25 | Ina-Schaeffler Kg | Connecting device for an actuating lever and a support element of a valve control of an internal combustion engine |
JP4144625B2 (en) * | 2006-01-19 | 2008-09-03 | トヨタ自動車株式会社 | Camshaft support structure for internal combustion engine |
JP4238874B2 (en) * | 2006-01-19 | 2009-03-18 | トヨタ自動車株式会社 | Camshaft support structure for internal combustion engine |
DE102006002996A1 (en) * | 2006-01-21 | 2007-08-02 | Schaeffler Kg | Rocker arms made of sheet steel |
DE102006031031A1 (en) | 2006-07-05 | 2008-01-10 | Schaeffler Kg | Lever-like cam follower of a valve train of an internal combustion engine |
EP1881166A1 (en) * | 2006-07-21 | 2008-01-23 | Schaeffler KG | Switchable valve operating mechanism for a combustion engine |
EP1881165A3 (en) * | 2006-07-21 | 2009-12-16 | Schaeffler KG | Switchable valve operating mechanism for a combustion engine |
JP4611964B2 (en) * | 2006-12-05 | 2011-01-12 | 株式会社オティックス | Rocker arm assembly module |
DE102008022601A1 (en) | 2008-05-07 | 2009-11-12 | Schaeffler Kg | Lever-type cam follower i.e. rocker arm, for operating gas exchange valve of internal-combustion engine, has base part and side walls formed concave at its connection points in elevation direction of joint-socket |
US8375909B2 (en) * | 2009-01-30 | 2013-02-19 | Eaton Corporation | Rocker arm retention |
JP5345075B2 (en) * | 2010-01-08 | 2013-11-20 | 株式会社オティックス | Rocker arm manufacturing method |
DE102010013942A1 (en) | 2010-04-06 | 2011-10-06 | Schaeffler Technologies Gmbh & Co. Kg | Lever-like cam follower for actuating gas-exchange valve of internal combustion engine, comprises elongated lever body made of metal sheet material, which has side walls spaced from each other |
DE102011005851A1 (en) | 2011-03-21 | 2012-09-27 | Schaeffler Technologies Gmbh & Co. Kg | Valve drive system for combustion engine, has switching valves in communication with hydraulic medium supply for unlocking or locking support members, and hydraulic medium supply formed within carrier for conducting hydraulic medium |
GB2501876A (en) | 2012-05-08 | 2013-11-13 | Eaton Srl | Hydraulic lash adjuster |
US9482120B2 (en) * | 2013-03-25 | 2016-11-01 | GT Technologies | Retention device for valve actuating mechanism |
DE102014215129A1 (en) * | 2014-08-01 | 2016-02-04 | Schaeffler Technologies AG & Co. KG | Lever for the valve actuation of an internal combustion engine |
DE112016001685T5 (en) * | 2015-05-07 | 2018-01-25 | Eaton Corporation | VALVE TRAIN ASSEMBLY |
DE112016001680T5 (en) * | 2015-05-07 | 2018-02-15 | Eaton Corporation | Valve train assembly with deactivation |
US9863291B2 (en) | 2015-05-14 | 2018-01-09 | GT Technologies | Locator for use in a valvetrain of a cylinder head of an internal combustion engine |
ITUA20163586A1 (en) * | 2016-04-29 | 2017-10-29 | Gnutti Carlo Spa | Valve drive system in endothermic engine |
US11286818B2 (en) | 2016-05-10 | 2022-03-29 | Eaton Intelligent Power Limited | Modular rocker arm |
WO2017216946A1 (en) * | 2016-06-17 | 2017-12-21 | 日鍛バルブ株式会社 | Mechanical lash adjuster |
DE102022109243A1 (en) | 2022-04-14 | 2023-10-19 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine for a motor vehicle and motor vehicle |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT87113B (en) * | 1915-09-06 | 1922-01-25 | Daimler Motoren | Valve control for prime movers. |
DE1260864B (en) * | 1965-12-07 | 1968-02-08 | Porsche Kg | Air-cooled internal combustion engine |
JPS5888412A (en) * | 1981-11-20 | 1983-05-26 | Honda Motor Co Ltd | Overhead valve rocker mechanism |
US4682575A (en) * | 1986-03-31 | 1987-07-28 | Ford Motor Company | Low friction high speed rocker arm |
US4762099A (en) * | 1986-07-08 | 1988-08-09 | Honda Giken Koygo Kabushiki Kaisha | Valve actuating device of four-cycle internal combustion engine |
US4913104A (en) * | 1988-11-30 | 1990-04-03 | Henley Manufacturing Corporation | Rocker arm for operating two valves |
JPH0397505U (en) * | 1990-01-27 | 1991-10-08 |
-
1998
- 1998-10-05 IT IT1998MI002136A patent/IT1302601B1/en active IP Right Grant
-
1999
- 1999-10-05 WO PCT/IB1999/001699 patent/WO2000020730A1/en active IP Right Grant
- 1999-10-05 JP JP2000574812A patent/JP4558938B2/en not_active Expired - Lifetime
- 1999-10-05 EP EP99970148A patent/EP1119689B2/en not_active Expired - Lifetime
- 1999-10-05 AT AT99970148T patent/ATE258271T1/en not_active IP Right Cessation
- 1999-10-05 BR BR9914635-5A patent/BR9914635A/en active IP Right Grant
- 1999-10-05 DE DE69914348T patent/DE69914348T3/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0020730A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2233704A1 (en) * | 2009-03-10 | 2010-09-29 | Schaeffler Technologies AG & Co. KG | Rocker arm holder for a valve drive of a combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JP2002526707A (en) | 2002-08-20 |
JP4558938B2 (en) | 2010-10-06 |
DE69914348D1 (en) | 2004-02-26 |
ATE258271T1 (en) | 2004-02-15 |
ITMI982136A1 (en) | 2000-04-06 |
WO2000020730A1 (en) | 2000-04-13 |
BR9914635A (en) | 2001-07-03 |
IT1302601B1 (en) | 2000-09-29 |
DE69914348T3 (en) | 2011-02-03 |
EP1119689B1 (en) | 2004-01-21 |
DE69914348T2 (en) | 2004-11-04 |
EP1119689B2 (en) | 2010-04-07 |
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