WO1993021427A1 - Ventilbetätigungsmechanismus für eine brennkraftmaschine - Google Patents
Ventilbetätigungsmechanismus für eine brennkraftmaschine Download PDFInfo
- Publication number
- WO1993021427A1 WO1993021427A1 PCT/EP1993/000822 EP9300822W WO9321427A1 WO 1993021427 A1 WO1993021427 A1 WO 1993021427A1 EP 9300822 W EP9300822 W EP 9300822W WO 9321427 A1 WO9321427 A1 WO 9321427A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rocker arms
- pistons
- speed range
- actuation mechanism
- valve actuation
- Prior art date
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
- 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
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/267—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder with means for varying the timing or the lift of the valves
Definitions
- the invention relates to a valve actuation mechanism for an internal combustion engine according to the preamble of claim 1.
- the pistons are displaced such that they penetrate the parting planes, whereby the second rocker arms are connected to the first rocker arms and the valves are actuated by the second rocker arms in accordance with the cam contour of the cams assigned to the second rocker arms.
- Different valve lifts and different opening times for the valves in the lower and in the upper speed range can thus be achieved.
- the disadvantage of this known construction is that in the lower speed range the pistons with their end faces constantly slide on each other and that a very high precision is required in the manufacture of the pistons and the bores.
- the invention has for its object to provide a valve actuation mechanism of the generic type, in which the wear is reduced and the manufacture is simplified.
- the pistons are retracted by their springs in the lower speed range, so that there is no contact with the second rocker arms. Because no holes are provided in the second rocker arms which have to be aligned with the holes in the first rocker arms when the valves are to be actuated by the second rocker arms, production is considerably simplified. All that is required is a flat machining of the underside of the traverse.
- the bores and the pistons in the first rocker arms preferably have a circular cross section.
- the end sections of the pistons which interact with the underside of the crossmember in the upper speed range, can have a flat surface, as a result of which a flat contact between the pistons and the crossmember is achieved and the surface pressure is reduced accordingly.
- FIG. 1 shows a valve train with a valve actuation mechanism according to the invention for three intake valves in vertical section along line 1-1 in FIG. 2, and
- FIG. 2 is a view in the direction of arrow 2 in FIG. 1.
- valve train for three intake valves E is shown. Each valve E is acted upon by a spring 1 in the closing direction.
- the valves are actuated by their own cams 2, 3 and 4 of a camshaft 5 via first rocker arms 6, which are pivotably mounted on a common fixed axis 7.
- the cams 2, 3 and 4 preferably have different cam profiles in order to achieve a different valve lift, a different opening duration and / or different control times for the individual intake valves and to create optimal conditions in the lower and middle speed range of the internal combustion engine.
- second cams 8 are provided on the camshaft 5 with an identical cam profile, which is designed for the conditions in the upper speed range of the internal combustion engine, that is to say, for example, produces a larger valve lift and a longer opening time.
- second cams 8 interact second rocker arms 9, which can be coupled in the upper speed range with the first rocker arms 6, so that in this speed range the valves E are operated according to the contour of the cams 8.
- the free ends of the second rocker arms 9 are connected to one another by a cross member 10 which runs in front of and at a short distance from the free ends of the first rocker arms 6.
- first drag Bails 6 are provided with radial bores 11 to the pivot axis 7, in each of which a piston 12 is arranged, which is displaceable between a first, inner position and a second outer position, in which the piston projects from its rocker arm 6 .
- the pistons 12 In this second position, shown in FIG. 1, the pistons 12 cooperate with the flat underside 10a of the cross member 10, so that the second rocker arms 9 can actuate the valves E via the first rocker arms 6 in accordance with the contour of the cams 8.
- the displacement of the pistons 12 to the outside takes place with the aid of a pressure medium which is fed through a channel 14 in the axis 7, which is connected to the bores 11.
- the pistons 12 are returned into their bores 11 by a spring 13, so that the second rocker arms 9 can swing freely and the actuation of the valves by the first rocker arms 6 corresponds to the contour of the cams 2, 3 and 4 takes place.
- the spring 13 is supported on the one hand on an insert 15 fixed in the bore 11 and on the other hand on the end of a sleeve 16 which is fastened to the piston 12 and extends through the insert 15.
- Each rocker arm 6 or 9 has a sliding surface 17 with which it rests on its cam 2, 3, 4 or 8.
- the second rocker arms 9 are held in contact with their cams by a spring 18.
- the spring 18 is arranged on a spark plug dome 19 and is supported on the one hand on a stationary spring plate 20 and on the other hand on a displaceable spring plate 21 which interacts with extensions 22 of the second rocker arms 9 which partially encompass the spark plug dome.
- the end sections of the pistons 12 are provided with flat surfaces 23 on which the crossbeam 10 has its flat underside 10a rests when the pistons 12 are in the pushed-out position shown.
- the surface pressure between the crossmember 10 and the pistons 13 is thus reduced.
- an anti-rotation device is provided in the form of a pin 24 which is inserted in the rocker arms 6 and with its lower face rests on the flat surface 23 of the piston. In the pushed-out position, the shoulder 25 created by the plane surface 23 bears against the pin 24, as a result of which the outward movement of the piston 12 is limited.
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
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93908895A EP0636206B1 (de) | 1992-04-16 | 1993-04-02 | Ventilbetätigungsmechanismus für eine brennkraftmaschine |
JP5517939A JPH07505462A (ja) | 1992-04-16 | 1993-04-02 | 内燃機関の動弁機構 |
DE59303266T DE59303266D1 (de) | 1992-04-16 | 1993-04-02 | Ventilbetätigungsmechanismus für eine brennkraftmaschine |
US08/318,757 US5463988A (en) | 1992-04-16 | 1993-04-02 | Valve actuating mechanism for an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4212844.7 | 1992-04-16 | ||
DE4212844A DE4212844A1 (de) | 1992-04-16 | 1992-04-16 | Ventilbetätigungsmechanismus für eine Brennkraftmaschine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993021427A1 true WO1993021427A1 (de) | 1993-10-28 |
Family
ID=6457003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1993/000822 WO1993021427A1 (de) | 1992-04-16 | 1993-04-02 | Ventilbetätigungsmechanismus für eine brennkraftmaschine |
Country Status (5)
Country | Link |
---|---|
US (1) | US5463988A (de) |
EP (1) | EP0636206B1 (de) |
JP (1) | JPH07505462A (de) |
DE (2) | DE4212844A1 (de) |
WO (1) | WO1993021427A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278401A (en) * | 1993-05-27 | 1994-11-30 | Audi Ag | I.c.engine valve gear |
CN101680314B (zh) * | 2007-05-15 | 2012-07-04 | 谢夫勒科技有限两合公司 | 用于内燃机的气门机构的构件 |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5615647A (en) * | 1995-03-28 | 1997-04-01 | Eaton Corporation | Latch assembly for a valve control system |
JP3402853B2 (ja) * | 1995-04-12 | 2003-05-06 | ヤマハ発動機株式会社 | エンジンの動弁装置 |
DE19621463A1 (de) * | 1996-05-29 | 1997-12-04 | Schaeffler Waelzlager Kg | Als Schwing- bzw. Kipphebel ausgebildeter Nockenfolger eines Ventiltriebs einer Brennkraftmaschine |
US6668779B2 (en) | 2002-05-08 | 2003-12-30 | Delphi Technologies, Inc. | Two-step finger follower rocker arm assembly |
DE10310220A1 (de) * | 2003-03-08 | 2004-09-16 | Daimlerchrysler Ag | Vorrichtung zur Koppelung bzw. Entkoppelung zweier Betätigungshebel eines Ventiltriebes einer Brennkraftmaschine und Verfahren hierzu |
DE102004007766A1 (de) | 2003-03-20 | 2004-09-30 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE10318295A1 (de) * | 2003-04-23 | 2004-11-11 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE10344406A1 (de) * | 2003-09-25 | 2005-04-28 | Ina Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE10345307A1 (de) * | 2003-09-30 | 2005-04-14 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE102004017103A1 (de) * | 2004-04-07 | 2005-10-27 | Ina-Schaeffler Kg | Umschaltbarer Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE102004039503A1 (de) * | 2004-08-14 | 2006-03-02 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmaschine |
DE102004048289A1 (de) * | 2004-10-05 | 2006-04-27 | Ina-Schaeffler Kg | Schlepphebel eines Ventiltriebs einer Brennkraftmashchine |
DE102004051422A1 (de) | 2004-10-22 | 2006-05-24 | Schaeffler Kg | Schaltbarer Schlepphebel |
DE102005003745A1 (de) * | 2005-01-27 | 2006-08-10 | Schaeffler Kg | Abschaltbares Abstützelement für einen Ventiltrieb einer Brennkraftmaschine |
US7318402B2 (en) * | 2005-11-21 | 2008-01-15 | Eaton Corporation | Dual lift rocker arm latch mechanism and actuation arrangement therefor |
DE102008027649A1 (de) * | 2008-06-10 | 2009-12-17 | Man Diesel Se | Ventilbetrieb für eine Brennkraftmaschine |
CN101457677B (zh) * | 2008-12-31 | 2010-09-08 | 奇瑞汽车股份有限公司 | 一种可变气门配气机构 |
JP5535695B2 (ja) * | 2010-03-08 | 2014-07-02 | 忠孝 山手 | エンジン |
WO2011116329A2 (en) * | 2010-03-19 | 2011-09-22 | Eaton Corporation | Switching rocker arm |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2199894A (en) * | 1987-01-08 | 1988-07-20 | Honda Motor Co Ltd | I.c. engine rocker valve gear |
EP0462853A1 (de) * | 1990-06-21 | 1991-12-27 | Automobiles Peugeot | Amplitudenveränderliche Vorrichtung für mindestens einen Brennkraftmaschinensteuerventilhub |
EP0505231A1 (de) * | 1991-03-19 | 1992-09-23 | Automobiles Peugeot | Hydraulische Steuervorrichtung für Amplitudenveränderliche Hubmechanismen mit mindestens einen Brennkraftmaschinenventil |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62121811A (ja) * | 1985-07-31 | 1987-06-03 | Honda Motor Co Ltd | 内燃機関の動弁装置 |
JPH03149306A (ja) * | 1989-11-02 | 1991-06-25 | Nissan Motor Co Ltd | エンジンの弁作動装置 |
JP2612788B2 (ja) * | 1991-09-04 | 1997-05-21 | 本田技研工業株式会社 | 内燃機関の動弁装置 |
EP0588336B1 (de) * | 1992-09-16 | 1995-12-27 | Honda Giken Kogyo Kabushiki Kaisha | Ventiltriebanordnung für eine Brennkraftmaschine |
-
1992
- 1992-04-16 DE DE4212844A patent/DE4212844A1/de not_active Withdrawn
-
1993
- 1993-04-02 US US08/318,757 patent/US5463988A/en not_active Expired - Fee Related
- 1993-04-02 EP EP93908895A patent/EP0636206B1/de not_active Expired - Lifetime
- 1993-04-02 DE DE59303266T patent/DE59303266D1/de not_active Expired - Lifetime
- 1993-04-02 WO PCT/EP1993/000822 patent/WO1993021427A1/de active IP Right Grant
- 1993-04-02 JP JP5517939A patent/JPH07505462A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2199894A (en) * | 1987-01-08 | 1988-07-20 | Honda Motor Co Ltd | I.c. engine rocker valve gear |
EP0462853A1 (de) * | 1990-06-21 | 1991-12-27 | Automobiles Peugeot | Amplitudenveränderliche Vorrichtung für mindestens einen Brennkraftmaschinensteuerventilhub |
EP0505231A1 (de) * | 1991-03-19 | 1992-09-23 | Automobiles Peugeot | Hydraulische Steuervorrichtung für Amplitudenveränderliche Hubmechanismen mit mindestens einen Brennkraftmaschinenventil |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2278401A (en) * | 1993-05-27 | 1994-11-30 | Audi Ag | I.c.engine valve gear |
GB2278401B (en) * | 1993-05-27 | 1996-02-28 | Audi Ag | A valve actuation mechanism for an internal combustion engine |
CN101680314B (zh) * | 2007-05-15 | 2012-07-04 | 谢夫勒科技有限两合公司 | 用于内燃机的气门机构的构件 |
Also Published As
Publication number | Publication date |
---|---|
JPH07505462A (ja) | 1995-06-15 |
EP0636206A1 (de) | 1995-02-01 |
US5463988A (en) | 1995-11-07 |
EP0636206B1 (de) | 1996-07-17 |
DE4212844A1 (de) | 1993-10-21 |
DE59303266D1 (de) | 1996-08-22 |
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