EP0679798B1 - Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine - Google Patents
Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0679798B1 EP0679798B1 EP95105779A EP95105779A EP0679798B1 EP 0679798 B1 EP0679798 B1 EP 0679798B1 EP 95105779 A EP95105779 A EP 95105779A EP 95105779 A EP95105779 A EP 95105779A EP 0679798 B1 EP0679798 B1 EP 0679798B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tappets
- valve
- cup
- pin
- shaft
- 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.)
- Expired - Lifetime
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
- F01L1/26—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
-
- 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
- F01L1/25—Hydraulic tappets between cam and valve stem
-
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis
Definitions
- the invention relates to a device for simultaneous Actuation of two gas exchange valves of an internal combustion engine with only one acting on a role Control cam.
- Such a device is described in DE-OS 40 39 256, at which a beam-shaped bridge that in their end areas hydraulic lash adjusters has that with the valve stem ends of the gas exchange valves are in contact, in the cylinder head of the internal combustion engine parallel to the axes of the gas exchange valves is led.
- the invention is therefore based on the object, a generic To create facility with little Installation space is sufficient.
- this object is achieved in that a bucket tappet coaxially for each of the two gas exchange valves is assigned, the tappet guides on their sides facing each other by a parallel to the Valve movement direction connected shaft are the tappets by a bridging the shaft Bolts are connected and on the bolt the roller in operative connection with the control cam is.
- the cup tappets are each advantageously on the side facing the shaft is flattened.
- cup tappets can each in a manner known per se a hydraulic valve lash adjuster arranged be, which is with its top on the supports the bolt above it.
- the tappets in the tappet guides of the cylinder block can be done easily a cross hole from a main oil line from the valve balancing elements Oil supplied from the engine oil circuit will. Because the tappets by turning the bolt are hindered, there is no need for the circumference of the tappets Ring groove; the oil channels stand in this way for everyone Valve stroke opposite. Because the bolt is directly with the valve balancing element is in contact, the tappet has not to transmit valve actuation forces itself, but only management functions. So he can a light material such as B. light metal or also be made of heat-resistant plastic.
- An embodiment made of one material is particularly advantageous with the same thermal expansion as the material of the cylinder head, since this does not change the bearing clearance occurs with temperature changes.
- the bolt is advantageously in the area of the system the valve lash adjusters flattened.
- the bolt is preferably floating in the tappets stored.
- the bearing of the bolt takes the tolerances as well possible thermal expansion in the distance between the two tappets of the jointly operated gas exchange valves on.
- the Bolts only in the blind holes in the tappets floating, without the valve lash adjusters to grab.
- FIGS. 1 and 2 and 5 to 8 A first exemplary embodiment is shown in FIGS. 1 and 2 and 5 to 8.
- the cylinder head 1 of an internal combustion engine are two gas exchange valves 2, 3 one in common actuated valve group in the usual way Valve guide bushes 4, 5 and guided by valve springs 6, 7 held in their closed position on valve seats 8, 9.
- Each gas exchange valve 2, 3 is a tappet 10, 11 assigned to the in a tappet guide 12, 13 of the Cylinder head 1 is slidably guided.
- the cup tappets 10, 11 are facing towards each other Flattened sides 14, 15. Between Cup tappets 10, 11 are the tappet guides 12, 13 through a parallel with the axes of the gas exchange valves 2, 3 extending shaft 16 connected. Between the flats 14, 15 of the tappets 10, 11 runs - the Shaft 16 bridging - a bolt 17 in the tappets 10, 11 is floating. On the bolt 17, taking up the width of the shaft 16, is one Roll 18 stored. A control cam acts on the roller 18 19 a camshaft mounted in the cylinder head 1 20 a. There are hydraulic ones in the tappets 10, 11 Valve clearance compensation elements 21, 22, which deal with one side on the face of the associated valve stem 23, 24 support. The other side of the valve lash adjuster 21, 22 relies on each a flat 25, 26 of the bolt 17, which is thus extends over the valve clearance compensation elements 21, 22.
- control cam 19 Since the control cam 19 is wider than the roller 18 are recesses 32 on the top of the tappets 10, 11 provided which the free access of the circumferential cam tip to serve.
- FIGS. 3 and 4 and 5 to 8 Another embodiment is shown in FIGS. 3 and 4 and 5 to 8 shown, in which the valve clearance compensation elements 21, 22 on the bottom 30, 31 of the tappets Support 10 ', 11'.
- the bolt 17 ' is on the side in addition to the valve clearance compensation elements 21, 22 in the Cup tappets 10 ', 11' floating.
- the invention enables a large number of further exemplary embodiments. So z. B. on the side flats the tappet can be dispensed with if the Distance between the two gas exchange valves to be operated simultaneously is sufficiently large to be between the tappets the shaft for the role of the role to be able to order.
- the Cup tappets 10, 11 from a light less firm Material such as B. a light alloy or one heat-resistant plastic, since they are only here Management tasks for the valve clearance compensation elements 21, 22 have to take over.
- the valve actuation forces in contrast, the control cam 19 on the role 18, the bolt 17 and the valve clearance compensation elements 21, 22 transferred directly to the valve stems 23, 24.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
- Fig. 1:
- einen Schnitt durch eine erfindungsgemäße Einrichtung;
- Fig. 2:
- einen Teilschnitt entlang der Linie A in Fig. 1;
- Fig. 3:
- einen Schnitt durch eine weitere erfindungsgemäße Einrichtung;
- Fig. 4:
- einen Teilschnitt entlang der Linie A in Fig. 3;
- Fig. 5:
- eine Ansicht in Richtung X auf die Tassenstößel und die Rolle nach Fig. 1 und Fig. 3;
- Fig. 6:
- eine Ansicht in Richtung Y auf die Tassenstößel und die Rolle nach Fig. 5;
- Fig. 7:
- einen Schnitt entlang der Linie C der Fig. 6;
- Fig. 8:
- einen Teilschnitt entlang der Linie B in Fig. 1.
Claims (6)
- Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine mit lediglich einem auf eine Rolle wirkenden Steuernocken, dadurch gekennzeichnet, daß jedem der beiden Gaswechselventile (2, 3) koaxial ein Tassenstößel (10, 11) zugeordnet ist, deren Stößelführungen (12, 13) auf ihren zueinander weisenden Seiten durch einen parallel zu der Ventilbetätigungsrichtung verlaufenden Schacht (16) verbunden sind, die Tassenstößel (10, 11) durch einen den Schacht (16) überbrückenden Bolzen (17) verbunden sind und auf dem Bolzen (17) die mit dem Steuernocken (19) in Wirkverbindung stehende Rolle (18) gelagert ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Tassenstößel (10, 11) jeweils an der zu dem Schacht (16) weisenden Seite eine Abflachung (14, 15) aufweisen.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in den Tassenstößeln (10, 11) jeweils ein hydraulisches Ventilspielausgleichselement (21, 22) angeordnet ist, welches sich mit seiner Oberseite an dem sich über diese Oberseite erstreckenden Bolzen (17) abstützt.
- Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Bolzen (17) im Bereich der Anlage der Ventilspielausgleichselemente (21, 22) mit Abflachungen (25, 26) versehen ist.
- Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Bolzen (17') in seitlichen Bohrungen der Tassenstößel (10', 11') gelagert ist.
- Einrichtung nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß der Bolzen (17, 17') in den Tassenstößeln (10, 11; 10', 11') schwimmend gelagert ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4415270A DE4415270A1 (de) | 1994-04-30 | 1994-04-30 | Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine |
DE4415270 | 1994-04-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0679798A1 EP0679798A1 (de) | 1995-11-02 |
EP0679798B1 true EP0679798B1 (de) | 1998-03-04 |
Family
ID=6516963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95105779A Expired - Lifetime EP0679798B1 (de) | 1994-04-30 | 1995-04-18 | Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0679798B1 (de) |
AT (1) | ATE163732T1 (de) |
DE (2) | DE4415270A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19603915A1 (de) * | 1996-02-03 | 1997-08-07 | Schaeffler Waelzlager Kg | Stößel für einen Ventiltrieb einer Brennkraftmaschine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4023886A1 (de) * | 1990-07-27 | 1992-01-30 | Bayerische Motoren Werke Ag | Rollenstoessel mit einem hydraulischen ausgleichselement |
DE4039075C2 (de) * | 1990-10-01 | 2001-11-29 | Volkswagen Ag | Ventiltrieb für zumindest zwei gleichzeitig betätigbare Hubventile |
DE4039256C2 (de) * | 1990-12-08 | 1996-05-09 | Schaeffler Waelzlager Kg | Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine |
DE4226760A1 (de) * | 1992-08-13 | 1994-02-17 | Opel Adam Ag | Ventiltrieb für zumindest zwei gleichzeitig betätigbare Hubventile |
DE4323518A1 (de) * | 1992-08-21 | 1994-02-24 | Bayerische Motoren Werke Ag | Stößel zur Betätigung zweier Hubventile |
DE9316125U1 (de) * | 1993-10-22 | 1993-12-16 | INA Wälzlager Schaeffler KG, 91074 Herzogenaurach | Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine |
-
1994
- 1994-04-30 DE DE4415270A patent/DE4415270A1/de not_active Withdrawn
-
1995
- 1995-04-18 EP EP95105779A patent/EP0679798B1/de not_active Expired - Lifetime
- 1995-04-18 DE DE59501520T patent/DE59501520D1/de not_active Expired - Lifetime
- 1995-04-18 AT AT95105779T patent/ATE163732T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE163732T1 (de) | 1998-03-15 |
DE59501520D1 (de) | 1998-04-09 |
DE4415270A1 (de) | 1995-11-02 |
EP0679798A1 (de) | 1995-11-02 |
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