EP3239482A1 - Commande de soupape pour moteur à combustion interne - Google Patents

Commande de soupape pour moteur à combustion interne Download PDF

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Publication number
EP3239482A1
EP3239482A1 EP17155010.6A EP17155010A EP3239482A1 EP 3239482 A1 EP3239482 A1 EP 3239482A1 EP 17155010 A EP17155010 A EP 17155010A EP 3239482 A1 EP3239482 A1 EP 3239482A1
Authority
EP
European Patent Office
Prior art keywords
roller
rocker arm
roller bolt
bolt
oil passage
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
Application number
EP17155010.6A
Other languages
German (de)
English (en)
Other versions
EP3239482B1 (fr
Inventor
Jürgen Rommel
Christoph Steinmetz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP3239482A1 publication Critical patent/EP3239482A1/fr
Application granted granted Critical
Publication of EP3239482B1 publication Critical patent/EP3239482B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication

Definitions

  • the present invention relates to a valve train for an internal combustion engine.
  • the invention also relates to an internal combustion engine with a camshaft and with such a valve train.
  • a camshaft on a cam By means of a conventional valve train, the movements of a camshaft on a cam are usually transmitted to an associated valve, thereby controlling, for example, the valve opening times.
  • camshafts with two different cams which can be taken by a corresponding displacement of a cam follower, such as a roller, an even greater influence on a lifting movement and thus on an opening time of an associated valve. If, for example, one of the two cams has only one base circle without a cam lift, then the associated cylinder can be switched off because the associated valve is not opened, provided that the cam follower interacts only with a cam having a base circle.
  • the present invention therefore deals with the problem of providing for a valve train an improved or at least one alternative embodiment, which in particular enables improved lubrication.
  • the present invention is based on the general idea to provide a valve train for an internal combustion engine, which allows it with an axially adjustable roller bolt, an axially fixed, rotatably mounted thereon role depending on the position of the roller bolt with at least two axially adjacent to each other arranged cam in operative connection to bring and at the same time a rocker arm of the valve train in such a way that it enables a lubrication of the roller and thus the valve train via a corresponding pressure oil supply, regardless of the position of the roller bolt.
  • the valve train according to the invention has an axially fixed and rotatably mounted on a roller bolt roller as a cam follower and a rotatably mounted about a Kipphebelachse rocker arm with a first oil passage and an axially offset second oil passage.
  • the roller bolt itself is adjustable in the axial direction between a first position and a second position and has a continuous oblique bore, which ends at a first end below the roller, thereby lubricating the same by a lubricating oil entry between the roller bolt and the roller.
  • the oblique bore is connected to a second end in the first position of the roller bolt with the first oil passage of the rocker arm and in the second position of the roller bolt with the second oil passage of the rocker arm fluidly connected, so that the role in both the first and in the second position of the Roller bolt sufficient oil can be supplied.
  • the roller itself is rotatably mounted between two Axialommesringen on the roller bolt and fixed by the two Axialommesringe in the axial direction on the roller bolt.
  • this axial securing can also be implemented by alternative embodiments.
  • the second oil channel is directed in the first position of the roller bolt on an outer surface of the roller or quite general of the cam follower.
  • the role or generally the cam follower is supplied through the first oil passage through the oblique bore with oil and splattered via the second oil passage from the outside with oil, whereby the roller is lubricated both from the inside and from the outside.
  • the roller bolt has an outwardly open axial groove, in which a pin of the rocker arm is guided to prevent rotation.
  • the roller bolt itself should only serve as an axially adjustable bearing of the roller and must not turn itself, otherwise the helical bore or generally the inclined channel could no longer be connected fluid-transmitting to the first or second oil passage on the rocker arm.
  • a pin which is guided in an outwardly open axial groove of the roller bolt, on the one hand an anti-rotation, on the other hand, however, an axial adjustment of the roller bolt and thereby an axial adjustment of the rotatably mounted roller for tapping different cam profiles possible.
  • the roller bolt has on the outside at least partially around the circumference extending splines, which cooperates with a complementary thereto formed splines on the rocker arm together and an axial displacement of the roller bolt allowed.
  • a spline toothing can only extend on one side or even only around a certain peripheral region of the roller bolt, wherein the axial guidance of the roller bolt relative to the rocker arm is made possible by interaction with the tilting-side splines.
  • a spring-biased engagement element is provided on the rocker arm, which engages in the first and in the second position of the roller bolt in associated recesses on the roller bolt and secures it in the axial direction.
  • the spring-biased engagement member may be formed, for example, as a spring-biased ball, which engages depending on the position of the roller bolt in an associated spherical segment-shaped recess on the outside of the roller bolt and thereby fixed the same in the axial direction.
  • At least one bearing bush is arranged between the roller bolt and the rocker arm.
  • the roller pin is not mounted directly in the rocker arm, but for example via the interposed bearing bush, as for example by an appropriate choice of materials, in particular by the selection of a friction-reducing material allows the roller bolt comparatively smooth in the Store rocker arm.
  • the present invention is further based on the general idea of equipping an internal combustion engine with a camshaft and a valvetrain cooperating with this camshaft in accordance with the preceding paragraphs.
  • Such an internal combustion engine has the great advantage that the valve train is lubricated optimally regardless of the position of the roller bolt or, resulting in a comparatively long life and life expectancy of the valve train and thus also of the internal combustion engine results.
  • the roller 5 acts as a cam follower and, depending on the position, interacts with a first cam 6 and an axially adjacent second cam 7 of a camshaft 8 of the internal combustion engine 2.
  • the roller 5 in the first position interacts with the second cam 7, while in the second position according to the FIG. 2 cooperates with the first cam 6.
  • the two cams 6, 7 may have different cam strokes or cam lobes, in particular, for example, one of the two cams 6, 7 may only have a base circle and cause a cylinder deactivation of a connected to a rocker arm 9 of the valve train 1 gas exchange valve.
  • the rocker arm 9 is rotatably supported about a Kipphebelachse 10 and has a first oil passage 11 and an axially offset second oil passage 12.
  • the roller pin 3 is axially between a first position (see. FIGS. 1 and 3 ) and a second position (cf. Figures 2 and 4 ) and has an oblique bore 13, which ends at a first end 14 below the roller 5.
  • the oblique bore 13 in the first position see. FIGS. 1 and 3
  • the first oil passage 11 of the rocker arm 9 and in the second position are fluidly connected to the second oil passage 12. This causes the roller 5 is always supplied with oil in both the first and second position of the roller bolt 3.
  • the roller bolt 3 has an outwardly open axial groove 16, in which a pin 17 of the rocker arm 9 is guided.
  • the axial groove 16 together with the pin 17 guided therein thereby defines the first and second positions of the roller bolt 3.
  • roller pin 3 outside a at least partially extending around the circumference fitting teeth 18 (see. Figures 2 and 4 ), which cooperates with a complementary thereto formed toothing 18 'on the rocker arm 9 and about an axial displacement of the roller bolt 3 allowed.
  • the spline 18 may alternatively extend only over a part of the circumference of the roller bolt 3 or may, of course, but in general also be arranged fully on the roller bolt 3.
  • a spring-biased engagement element 19 is preferably provided on the rocker arm 9, which in the first position and in the second position of the roller bolt 3 in associated recesses 20 and 20 respectively 'engages the roller pin 3 and this secures it in the axial direction 4.
  • the engagement member 9 which is formed in this case, for example, as a spring-biased ball, in the recess 20 on the roller pin 3, while the engagement member 9 mutatis mutandis Figures 2 and 4 engages in the recess 21 on the roller pin 3 and this fixed over it in its second position.
  • the engagement member 9 mutatis mutandis Figures 2 and 4 engages in the recess 21 on the roller pin 3 and this fixed over it in its second position.
  • valve drive 1 In general, with the valve drive 1 according to the invention a significantly improved lubrication of a cam follower, specifically the roller 5, regardless of the respective switching position of the roller bolt 3 can be achieved, thereby increasing the life expectancy of the valve gear 1 according to the invention and also a smoother operation can be ensured.
EP17155010.6A 2016-04-07 2017-02-07 Commande de soupape pour moteur à combustion interne Not-in-force EP3239482B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016205833.9A DE102016205833A1 (de) 2016-04-07 2016-04-07 Ventiltrieb für eine Brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP3239482A1 true EP3239482A1 (fr) 2017-11-01
EP3239482B1 EP3239482B1 (fr) 2018-11-28

Family

ID=57995065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17155010.6A Not-in-force EP3239482B1 (fr) 2016-04-07 2017-02-07 Commande de soupape pour moteur à combustion interne

Country Status (2)

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EP (1) EP3239482B1 (fr)
DE (1) DE102016205833A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622821A (zh) * 2020-01-23 2020-09-04 姬腾飞 一种可自行开闭滚轮轴润滑油孔的发动机摇臂

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018207459A1 (de) * 2018-05-15 2019-11-21 Mahle International Gmbh Ventilantriebsvorrichtung
DE102018207456A1 (de) * 2018-05-15 2019-11-21 Mahle International Gmbh Lageranordnung einer Nockenrolle eines Ventiltriebs
AT521311B1 (de) 2018-05-22 2020-07-15 Avl List Gmbh Ventiltrieb einer brennkraftmaschine
DE102019203430A1 (de) * 2019-03-13 2020-09-17 Mahle International Gmbh Ventiltrieb einer Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4708102A (en) * 1986-09-08 1987-11-24 Navistar International Transportation Corp. Roller cam follower with positive lubrication
DE19549221A1 (de) * 1995-12-30 1997-07-03 Bosch Gmbh Robert Brennkraftmaschine mit einem Nockenantrieb
DE19700736A1 (de) * 1997-01-11 1998-07-23 Porsche Ag Ventiltrieb einer Brennkraftmaschine
DE102010011828A1 (de) * 2010-03-18 2011-09-22 Schaeffler Technologies Gmbh & Co. Kg Schaltbarer Hebel für einen Ventiltrieb einer Brennkraftmaschine
CN104100324A (zh) * 2013-04-03 2014-10-15 重庆长安汽车股份有限公司 摇臂式两级可变气门升程机构
US20150167511A1 (en) * 2013-12-12 2015-06-18 Hyundai Motor Company 2-step variable valve lift apparatus actuated by dual roller bearings using electromagnetic system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3365805B2 (ja) * 1993-01-20 2003-01-14 株式会社オティックス 可変動弁機構
DE102007049074A1 (de) * 2007-10-12 2009-04-16 Schaeffler Kg Nockenfolger zur variablen Betätigung eines Gaswechselventils einer Brennkraftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4708102A (en) * 1986-09-08 1987-11-24 Navistar International Transportation Corp. Roller cam follower with positive lubrication
DE19549221A1 (de) * 1995-12-30 1997-07-03 Bosch Gmbh Robert Brennkraftmaschine mit einem Nockenantrieb
DE19700736A1 (de) * 1997-01-11 1998-07-23 Porsche Ag Ventiltrieb einer Brennkraftmaschine
DE102010011828A1 (de) * 2010-03-18 2011-09-22 Schaeffler Technologies Gmbh & Co. Kg Schaltbarer Hebel für einen Ventiltrieb einer Brennkraftmaschine
CN104100324A (zh) * 2013-04-03 2014-10-15 重庆长安汽车股份有限公司 摇臂式两级可变气门升程机构
US20150167511A1 (en) * 2013-12-12 2015-06-18 Hyundai Motor Company 2-step variable valve lift apparatus actuated by dual roller bearings using electromagnetic system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111622821A (zh) * 2020-01-23 2020-09-04 姬腾飞 一种可自行开闭滚轮轴润滑油孔的发动机摇臂
CN111622821B (zh) * 2020-01-23 2022-04-15 姬腾飞 一种可自行开闭滚轮轴润滑油孔的发动机摇臂

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Publication number Publication date
DE102016205833A1 (de) 2017-10-12
EP3239482B1 (fr) 2018-11-28

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