EP4158162A1 - Nockenwelle für eine verbrennungskraftmaschine sowie lagerungsanordnung von nockenwellen an einem zylinderkopf einer verbrennungskraftmaschine - Google Patents
Nockenwelle für eine verbrennungskraftmaschine sowie lagerungsanordnung von nockenwellen an einem zylinderkopf einer verbrennungskraftmaschineInfo
- Publication number
- EP4158162A1 EP4158162A1 EP21728185.6A EP21728185A EP4158162A1 EP 4158162 A1 EP4158162 A1 EP 4158162A1 EP 21728185 A EP21728185 A EP 21728185A EP 4158162 A1 EP4158162 A1 EP 4158162A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- cylinder head
- internal combustion
- combustion engine
- recess
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- 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
- F01L2001/0476—Camshaft bearings
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
-
- 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
- F01L2303/00—Manufacturing of components used in valve arrangements
- F01L2303/02—Initial camshaft settings
Definitions
- the invention relates to a camshaft for an internal combustion engine according to the preamble of claim 1. Furthermore, the invention relates to a bearing arrangement for camshafts on a cylinder head of an internal combustion engine according to the preamble of claim 3.
- Such a camshaft for an internal combustion engine and such a bearing arrangement of camshafts on a cylinder head of an internal combustion engine are already known, for example, from DE 202015 008 502 U1.
- the respective camshaft is rotatably mounted on the cylinder head.
- the respective camshaft has a recess which is formed in a respective outer circumferential surface of the respective camshaft and is open to the outside in the radial direction of the respective camshaft, into which a tool can be inserted and thus brought into positive interaction with the respective camshaft. In this way, for example, a torque can be transmitted between the tool and the camshaft, so that the respective camshaft can be secured by means of the tool against twisting in particular relative to the cylinder head.
- DE 102010 024 721 A1 discloses a cam for a camshaft for an internal combustion engine, the cam having an axial extension with a holding contour suitable for a holding tool.
- the object of the present invention is to further develop a camshaft and a bearing arrangement of the type mentioned at the beginning in such a way that particularly simple assembly can be achieved.
- the invention provides that the recess is arranged offset in the radial direction relative to the center of the camshaft.
- the middle of the camshaft is to be understood in particular as its longitudinal axis or longitudinal center axis which, for example, coincides with an axis of rotation about which the camshaft is rotatably mounted on a cylinder head of the internal combustion engine, which is preferably designed as a reciprocating piston engine.
- the wall areas delimiting the recess in an imaginary section perpendicular to the camshaft through the recess are dimensioned differently with regard to their height and / or wall thickness, and are therefore dimensioned in accordance with the load. This allows the mass of the camshaft to be kept low.
- the invention provides that the respective recess is arranged offset in the radial direction to the respective center of the respective camshaft.
- Advantages and advantageous configurations of the camshaft according to the invention are to be regarded as advantages and advantageous configurations of the bearing arrangement according to the invention, and vice versa.
- a camshaft for an internal combustion engine can have planar surfaces on both sides on its outer circumference, which form what is known as a double surface.
- a fork-wrench-shaped tool can be placed on the double-face, that is to say on the flat surfaces, whereby the fork-wrench-shaped tool can be brought into positive interaction with the camshaft. In this way, a torque can be transmitted between the fork-wrench-shaped tool and the camshaft, whereby the camshaft can be secured against twisting relative to the cylinder head.
- camshaft adjuster is screwed to the camshaft, in particular on the front side.
- the camshaft is held by means of the tool in order to prevent the camshaft from rotating when the phase adjuster is screwed onto the camshaft or to rotate a screw element, by means of which the camshaft adjuster is screwed onto the camshaft, relative to the camshaft and thereby screw it to the camshaft be able.
- a cylinder head cover is usually placed on the cylinder head and on the camshaft.
- the cylinder head cover usually has a through opening which is formed in or on an upper side of the cylinder head cover, which is also simply referred to as a cover.
- the through opening is an auxiliary assembly opening through which the tool can reach. Since, for example, at least or exactly two camshafts are rotatably mounted on the cylinder head, each of the camshafts having a double flat, the cylinder head cover has an auxiliary assembly opening for each double flat, so that the cylinder head cover can have two auxiliary assembly openings.
- the respective auxiliary assembly opening must be made relatively large, since the open-ended wrench has to encompass the double-flat or the respective camshaft.
- Such an excessively large through-opening in the cylinder head cover can undesirably weaken the cylinder head cover, or the cylinder head cover must be designed to be particularly massive and therefore weight-intensive and space-intensive in other areas adjoining the respective auxiliary assembly opening.
- the auxiliary assembly opening can be kept particularly small.
- the cylinder head cover can be designed to be sufficiently stable in a manner that is economical in terms of space and weight, as well as being inexpensive.
- a particularly simple and thus time-saving and inexpensive assembly can be implemented.
- the respective recesses of the two camshafts of a cylinder head, in which two camshafts are rotatably mounted are arranged mirror-symmetrically offset with respect to a plane perpendicular to the plane spanned by the longitudinal center axes of the two camshafts, in particular towards the center of the cylinder head. This also makes it possible to offset the two auxiliary mounting openings towards the center of the cylinder head, or to keep the total opening width of a single auxiliary mounting opening common to both camshafts small.
- At least one of the auxiliary assembly openings is preferably covered by a component of this, such as an ignition coil.
- a component of this such as an ignition coil.
- Fig. 1 is a fragmentary schematic and through one to the through the
- Fig. 2 is a fragmentary schematic plan view of the storage arrangement. Identical or functionally identical elements are provided with the same reference symbols in the figures.
- FIG. 1 shows, in a schematic and sectioned front view, a bearing arrangement 10 of a first camshaft 12 and a second camshaft 14 on a cylinder head 16 of an internal combustion engine of a motor vehicle designed as a reciprocating piston engine.
- the motor vehicle which is preferably designed as a motor vehicle, in particular as a passenger vehicle, in its fully manufactured state, the
- the camshafts 12 and 14 are rotatably mounted on the cylinder head 16, so that the respective camshaft 12 or 14 can be rotated about a respective axis of rotation relative to the cylinder head 16.
- the axes of rotation of the camshafts 12 and 14 run parallel to one another and are spaced from one another.
- the respective axis of rotation of the respective camshaft 12 or 14 runs through its respective center, denoted by M in FIG. 1.
- the axis of rotation thus coincides with a respective longitudinal axis or longitudinal center axis of the respective camshaft 12 or 14 running through the respective center M.
- the respective camshaft 12 or 14 has a respective recess 20 formed in a respective outer peripheral surface 18 of the respective camshaft 12 or 14, which in the embodiment shown in the figures is designed as a blind hole.
- the respective recess 20 is a bore, in particular a blind bore.
- a phase adjuster also referred to as a camshaft adjuster.
- a central screw is used, which is screwed at least essentially centrally, i.e.
- the camshaft adjuster enables the respective camshaft 12 or 14 to be rotated relative to an output shaft of the internal combustion engine, for example designed as a crankshaft, and thus to adjust its phase, while the respective camshaft 12 or 14 is coupled to the output shaft in a torque-transmitting manner and, for example, driven by the output shaft will.
- the respective camshaft 12 or 14 In order to screw the central screw to the respective camshaft 12 or 14 by means of a tightening torque and in particular to tighten it, and so that a desired angular orientation is set between the respective camshaft 12 or 14 and the respective camshaft adjuster, the respective camshaft 12 or 14 is rigid with regard to its rotational position Cylinder head 16 locked, that is to say secured against twisting relative to cylinder head 16. In this way, a tightening torque can be supported by means of which the central screw is screwed and in particular tightened to the respective camshaft 12 or 14, so that the central screw can be screwed and in particular tightened with the respective camshaft 12 or 14.
- the respective camshaft 12 or 14 In order to avoid such a rotation of the respective camshaft 12 or 14 relative to the cylinder head 16, the respective camshaft 12 or 14 is locked.
- the respective camshaft 12 or 14 has planar surfaces on both sides on its outer circumference, which form a double surface. This is to be understood in particular as the fact that the planar or even surfaces are arranged on opposite sides, in particular in the radial direction of the camshaft 12 or 14.
- a fork-wrench-shaped tool also referred to as an open-ended wrench, can be placed on the flat and thus on the flat surfaces and thus brought into positive interaction with the respective camshaft 12 or 14.
- the internal combustion engine is a hood which is formed separately from the cylinder head 16 and is also referred to simply as a hood Has cylinder head cover 22, which is placed on the cylinder head 16 and the camshafts 12 and 14 and is thus arranged above the cylinder head 16 and the camshafts 12 and 14.
- the cylinder head 16 and the camshaft 12 and 14 are each at least partially, in particular at least predominantly, covered and thus covered upwards in the vertical direction of the internal combustion engine.
- the hood has, for example, a respective through opening 24 for each two-sided and thus for each camshaft 12 or 14.
- the respective through opening 24 must be sufficiently large so that the open-ended wrench can reach through the respective through opening 24 and subsequently be attached to the respective double-face, i.e. it can be brought into positive interaction with the respective double-face.
- the through-opening 24 must be made relatively large, since the open-end wrench must grip around the respective camshaft 12 or 14 and its jaws must be large enough to absorb the torque. If two camshafts 12 and 14 are provided, the two through openings 24 then required, lying next to one another, occupy almost the entire width of the cylinder head cover 22.
- the aforementioned double flat is not provided, but the respective camshaft 12 or 14 has the respective recess 20 into which an open-end wrench in particular different tools can be inserted and thereby brought into positive interaction with the respective camshaft 12 or 14, whereby the camshaft 12 or 14 can be secured against rotation relative to the cylinder head 16 by means of the tool.
- the respective recess 20, for example designed as a bore is arranged offset in the radial direction of the respective camshaft 12 or 14 relative to the respective center M of the respective camshaft 12 or 14.
- the through openings 24, which are also simply referred to as openings can be made particularly small, as a result of which excessive weakening of the cylinder head cover 22 can be avoided.
- the two recesses 20 are arranged mirror-symmetrically offset with respect to a plane perpendicular to the plane spanned by the longitudinal center axes of the two camshafts (12, 14). This mirror-symmetrical arrangement leads to the two recesses 20 being at a smaller distance from one another have than the two longitudinal center axes of the camshafts (12, 14). Therefore, the two through openings 24 are also spaced less than the two longitudinal center axes of the camshafts (12, 14).
- first wall region W1 at least partially delimiting the through openings 24, which preferably at least predominantly, in particular completely, surrounds and thus delimits the first through opening 24, and a first wall region W1 at least partially, in particular at least predominantly or completely , surrounding and thus delimiting second wall area W2 of cylinder head cover 22, in particular in the vertical direction of the internal combustion engine, are arranged at different heights.
- the wall areas W1 and W2 are formed in one piece with one another in the present case.
- the wall areas W1 and W2 are also referred to as flanks.
- the through openings 24 are arranged in respective imaginary planes that are spaced apart from one another and are spaced apart from one another in particular in the vertical direction of the internal combustion engine. As a result, the through openings 24 are arranged at the aforementioned heights that are different from one another.
- the through openings 24 can be configured significantly smaller, that is to say as significantly smaller assembly openings. Material and thus weight and costs are saved.
- internal combustion engines also referred to simply as motors or internal combustion engines
- the camshafts 12 and 14 of which rotate in opposite directions or have opposite directions of rotation the central screws are rotated with different directions of rotation and thus by means of a right-hand thread and a left-hand thread and are thereby screwed and tightened or tightened. Therefore, the directions of action of the tightening torques to be supported are opposite to one another.
- a mirror-symmetrical design of the recesses 20, also referred to as locking openings enables a load-appropriate design for both Camshafts 12 and 14.
- the wall areas delimiting the recess (20) are dimensioned differently with regard to their height and wall thickness.
- the recesses 20 are arranged at different heights.
- the centers M are arranged at different heights.
- the respective ignition coils can, for example, be arranged towards the middle and further away from an exhaust gas turbocharger. This keeps their thermal load low.
- the recesses 20, also referred to as support openings are arranged mirror-symmetrically to the cylinder or cylinder head center, both through openings 24, also referred to as auxiliary assembly openings, jointly occupy a particularly small width in or on the cylinder head cover 22. If a further component covers the auxiliary assembly opening, the respective, Cover 26, also referred to as a closure cover, can be avoided.
- the aforementioned center of the cylinder head can be seen in FIG. 1 and is denoted by M2.
- the aforementioned exhaust gas turbocharger can be seen, which is designated by 28 in FIG. 1 and has a compressor wheel 30, a shaft 32, also designated as a turbocharger shaft, and a turbine wheel 34 that can be driven by exhaust gas from the internal combustion engine.
- the compressor wheel 30 and the turbine wheel 34 are impellers which are each connected to the shaft 32 in a rotationally fixed manner.
- the compressor wheel 30 can be driven by the turbine wheel 34 via the shaft 32, by means of which air, which is supplied to at least one combustion chamber of the internal combustion engine, is compressed.
- an oil return 36 with a pipe elbow can be seen from FIG. 1.
- FIG. 2 shows a section of the storage arrangement 10 in a schematic plan view.
- One of the aforementioned ignition coils can be seen from FIG. 2 and is designated by 38.
- a double arrow 40 in FIG. 2 illustrates a distance between ignition coil 38 and an exhaust system of the internal combustion engine through which exhaust gas from the combustion chamber can flow.
- the camshaft 12 is an intake camshaft and the camshaft 14 is an exhaust camshaft.
- the respective recess 20 is designed as a groove, the respective center of which is denoted by M3 in FIG. 2. It can be seen particularly well from FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020003283.4A DE102020003283A1 (de) | 2020-06-02 | 2020-06-02 | Nockenwelle für eine Verbrennungskraftmaschine sowie Lagerungsanordnung von Nockenwellen an einen Zylinderkopf einer Verbrennungskraftmaschine |
| PCT/EP2021/063281 WO2021244850A1 (de) | 2020-06-02 | 2021-05-19 | Nockenwelle für eine verbrennungskraftmaschine sowie lagerungsanordnung von nockenwellen an einem zylinderkopf einer verbrennungskraftmaschine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4158162A1 true EP4158162A1 (de) | 2023-04-05 |
| EP4158162C0 EP4158162C0 (de) | 2025-02-12 |
| EP4158162B1 EP4158162B1 (de) | 2025-02-12 |
Family
ID=76159419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21728185.6A Active EP4158162B1 (de) | 2020-06-02 | 2021-05-19 | Verbrennungskraftmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11965435B2 (de) |
| EP (1) | EP4158162B1 (de) |
| CN (1) | CN115917123A (de) |
| DE (1) | DE102020003283A1 (de) |
| WO (1) | WO2021244850A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020004191B3 (de) * | 2020-07-13 | 2021-04-08 | Daimler Ag | Verfahren zum Starten einer Verbrennungskraftmaschine eines Kraftfahrzeugs sowie Kraftfahrzeug |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112005002784A5 (de) * | 2004-11-11 | 2007-09-20 | Avl List Gmbh | Zylinderkopfanordnung für eine Brennkraftmaschine |
| JP5415363B2 (ja) * | 2010-06-11 | 2014-02-12 | 本田技研工業株式会社 | 内燃機関のシリンダヘッド構造 |
| DE102010024721A1 (de) | 2010-06-23 | 2012-03-29 | Mahle International Gmbh | Nocken und zugehörige Nockenwelle |
| CN101915135B (zh) * | 2010-08-05 | 2012-06-27 | 奇瑞汽车股份有限公司 | 一种发动机凸轮轴和偏心轮轴后端槽定位卡板及装配方法 |
| DE102011121860A1 (de) * | 2011-12-21 | 2013-06-27 | Volkswagen Aktiengesellschaft | Verbrennungsmotor mit Öffnung zum Abstecken einer Welle und Geberelement zur Erfassung der Winkellage der Welle |
| GB2516685A (en) * | 2013-07-30 | 2015-02-04 | Gm Global Tech Operations Inc | Cam carrier assembly for an internal combustion engine |
| JP6237175B2 (ja) * | 2013-12-05 | 2017-11-29 | 三菱自動車工業株式会社 | エンジン |
| DE102015214725A1 (de) * | 2015-08-03 | 2017-02-09 | Volkswagen Aktiengesellschaft | Verbrennungsmotor und Verfahren zur Montage eines Verbrennungsmotors |
| DE202015105757U1 (de) * | 2015-10-29 | 2016-01-28 | Borgward Trademark Holdings Gmbh | Vorrichtung zum Einbauen und Positionieren einer Nockenwelle eines Motors |
| DE202015008502U1 (de) | 2015-12-10 | 2017-03-13 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Absteckvorrichtung zum Zusammenwirken mit wenigstens einer Nockenwelle einer Brennkraftmaschine, Haube zum Lagern der Absteckvorrichtung an der Brennkraftmaschine sowie Verwendung der Absteckvorrichtung beim Einstellen eines Steuertriebs |
| DE102016217356B4 (de) * | 2016-09-12 | 2021-02-18 | Volkswagen Aktiengesellschaft | Vorrichtung zur vorübergehenden relativen drehfesten Arretierung von zwei Nockenwellen |
| AT519206B1 (de) * | 2016-09-19 | 2019-02-15 | Avl Ditest Gmbh | Vorrichtung zur Positionsbestimmung und/oder Verstellung zumindest einer Welle einer Brennkraftmaschine |
-
2020
- 2020-06-02 DE DE102020003283.4A patent/DE102020003283A1/de active Pending
-
2021
- 2021-05-19 WO PCT/EP2021/063281 patent/WO2021244850A1/de not_active Ceased
- 2021-05-19 US US18/007,515 patent/US11965435B2/en active Active
- 2021-05-19 EP EP21728185.6A patent/EP4158162B1/de active Active
- 2021-05-19 CN CN202180038685.7A patent/CN115917123A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN115917123A (zh) | 2023-04-04 |
| EP4158162C0 (de) | 2025-02-12 |
| US11965435B2 (en) | 2024-04-23 |
| WO2021244850A1 (de) | 2021-12-09 |
| DE102020003283A1 (de) | 2021-12-02 |
| US20230212962A1 (en) | 2023-07-06 |
| EP4158162B1 (de) | 2025-02-12 |
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