EP3673155A1 - Ventiltrieb für eine brennkraftmaschine - Google Patents
Ventiltrieb für eine brennkraftmaschineInfo
- Publication number
- EP3673155A1 EP3673155A1 EP18740574.1A EP18740574A EP3673155A1 EP 3673155 A1 EP3673155 A1 EP 3673155A1 EP 18740574 A EP18740574 A EP 18740574A EP 3673155 A1 EP3673155 A1 EP 3673155A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- camshaft
- cam
- internal combustion
- valve
- combustion engine
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- KJFBVJALEQWJBS-XUXIUFHCSA-N maribavir Chemical compound CC(C)NC1=NC2=CC(Cl)=C(Cl)C=C2N1[C@H]1O[C@@H](CO)[C@H](O)[C@@H]1O KJFBVJALEQWJBS-XUXIUFHCSA-N 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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
- F01L1/026—Gear drive
-
- 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
- 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
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L2001/0475—Hollow 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
- F01L1/02—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
- 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
- F01L2013/0052—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 with cams provided on an axially slidable sleeve
Definitions
- the invention relates to a valve train for an internal combustion engine with the features of the preamble of patent claim 1.
- the technical environment is referred to, for example, the European
- Patent Application EP 0 595 060 A1 From this
- a valve train of an internal combustion engine which has axially displaceable on a camshaft preloaded sliding cam.
- the sliding cams are in a first position in which you act on a first elevation curve intake valves can be moved to a second position in which you act on the inlet valves with a second survey curve.
- the shift cams engage positively against a stop of a transmission element connected between the intake valves and the shift cams as long as they run with a section in the area of the stop.
- Upon reaching the base circle of the sliding cam these are moved to the second position.
- sliding cam is for example from the
- German Offenlegungsschrift DE 10 2005 006 489 A1 It is a camshaft assembly which is a fundamental and on it has arranged, axially displaceable but non-rotatably held cam carrier. There are cams with several on the cam carriers
- the cams actuate valve actuators of associated cylinders.
- actuators for performing switching operations wherein in the switching operations by axial displacement of cam carriers on the fundamental shaft another of the cam curves of the cam comes into contact with the valve actuating means.
- German Offenlegungsschrift DE 10 2004 022 833 A1 discloses a further valve drive for an internal combustion engine.
- This valvetrain comprises a camshaft having a sliding cam device which has adjacent cam-acting camshafts having different cam shapes and lift curves, which cam curves cooperate with control pins having control pins for adjusting the cam means.
- the object of the present invention is to avoid the abovementioned disadvantages.
- the inventive concept offers significant reductions in manufacturing costs, since no precise gears are to be manufactured.
- the embodiments according to claim 2 and 3 are two particularly preferred embodiments.
- the moving masses are significantly reduced during switching operations, so that much faster switching operations are possible.
- FIG. 1 shows a plan view of a valve drive according to the invention for an internal combustion engine.
- Figure 1 shows a plan view of a valve gear 1 according to the invention for a cylinder head 16 of an internal combustion engine, not shown.
- the cylinder head 16 is shown without a valve cover, so that a clear view of the valve train 1 is given.
- the cylinder head 16 is for a
- Camshaft 4 is rotatably mounted in a first and a second camshaft bearing 2, 3, wherein only the bearing blocks are shown in the cylinder head 16 with not numbered bolting holes.
- the first camshaft 4 has four cams 5, of which only one cam 5 is numbered.
- the cam 5 has a first cam curve 6 and a second cam curve 7 different from the first cam curve 6.
- An unillustrated gas exchange valve is not shown on a
- a camshaft portion 8 is provided with radially encircled, not quantified control grooves, with which the first camshaft 4 via an actuating means 9 via a pin which projects into the control grooves in the
- Camshaft bearings 2, 3, is axially displaceable.
- the first camshaft 4 is displaceable in such a way that the cam 5 actuates the gas exchange valve via the intermediate element either via the first or the second cam curve 6, 7. Since the adjusting means 9 is known from the prior art, this will not be explained in detail
- the first camshaft 4 and the cam 5 have a fixed position relative to each other wherein the entire camshaft 4 in the first and the second camshaft bearings 2, 3, is axially displaceable.
- the cam 5 and the camshaft 4 are made in one piece and made of the same material, for example by casting with subsequent reworking.
- the cam 5 may also be joined or shrunk onto the first camshaft 4. The production in a hydroforming process (hydroforming) is possible.
- the camshaft 4 is hollow, to reduce the moving masses, which is much faster
- Cam curves 6, 7 of the cam 5 are alternately in operative connection with the gas exchange valve. It is also possible to represent more than two cam curves 6, 7.
- valve gear 1 according to the invention is suitable both for single-track vehicles, such. B. mopeds and motorcycles as well as for
- valve train 1 on the outlet side as already shown, a second, in a third and a fourth camshaft bearing 10, 1 1 and two other, not numbered camshaft bearings rotatably mounted, for the first camshaft 4 arranged in parallel second camshaft 12.
- the first camshaft 4 has a first spur gear 13 extending radially around the camshaft 4
- the second camshaft 12 has a second gear extending radially around the second camshaft 12 Spur gear 14, wherein the first spur gear 13 and the second spur gear 14 via a third spur gear 15 with each other in
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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017214791.1A DE102017214791B4 (de) | 2017-08-24 | 2017-08-24 | Zylinderkopf für eine vierzylindrige Brennkraftmaschine |
| PCT/EP2018/068925 WO2019037942A1 (de) | 2017-08-24 | 2018-07-12 | Ventiltrieb für eine brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3673155A1 true EP3673155A1 (de) | 2020-07-01 |
Family
ID=62909531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18740574.1A Withdrawn EP3673155A1 (de) | 2017-08-24 | 2018-07-12 | Ventiltrieb für eine brennkraftmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20200149444A1 (de) |
| EP (1) | EP3673155A1 (de) |
| CN (1) | CN110709585A (de) |
| DE (1) | DE102017214791B4 (de) |
| WO (1) | WO2019037942A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010020458A1 (en) * | 2000-03-09 | 2001-09-13 | Toyota Jidosha Kabushiki Kaisha | Valve characteristic control apparatus of internal combustion engine and methods of controlling valve characteristics |
| DE102014221794A1 (de) * | 2014-10-27 | 2016-04-28 | Schaeffler Technologies AG & Co. KG | Hubvariabler Ventiltrieb eines Verbrennungsmotors |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT408127B (de) * | 1992-07-13 | 2001-09-25 | Avl Verbrennungskraft Messtech | Brennkraftmaschine mit mindestens einer durch eine verstellvorrichtung axial verschiebbaren nockenwelle |
| DE4236655A1 (de) * | 1992-10-30 | 1994-05-05 | Porsche Ag | Ventilantrieb für eine Brennkraftmaschine |
| US5598630A (en) * | 1995-08-11 | 1997-02-04 | Chrysler Corporation | Method of designing family of DOHC cylinder heads |
| DE102004022833A1 (de) * | 2004-05-08 | 2005-12-01 | Dr.Ing.H.C. F. Porsche Ag | Ventiltrieb für eine Brennkraftmaschine |
| DE102005006489B4 (de) * | 2005-02-12 | 2015-11-19 | Audi Ag | Nockenwellenanordnung |
| DE102005058548B4 (de) * | 2005-12-08 | 2020-11-12 | Audi Ag | Ventiltrieb für eine Verbrennungskraftmaschine |
| DE102013111410B4 (de) * | 2013-10-16 | 2024-12-24 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Ventiltrieb für eine Brennkraftmaschine sowie Brennkraftmaschine |
| DE102015218775A1 (de) * | 2015-09-29 | 2017-03-30 | Mahle International Gmbh | Brennkraftmaschine |
| DE102016200424A1 (de) * | 2016-01-15 | 2017-07-20 | Schaeffler Technologies AG & Co. KG | Variabler Ventiltrieb |
| DE102016206060A1 (de) * | 2016-04-12 | 2017-10-12 | Schaeffler Technologies AG & Co. KG | Variabler Ventiltrieb |
| DE102016208392A1 (de) * | 2016-05-17 | 2017-11-23 | Schaeffler Technologies AG & Co. KG | Nockenwelle |
| US10006323B2 (en) * | 2016-10-12 | 2018-06-26 | GM Global Technology Operations LLC | Multi-step sliding cam actuators for internal combustion engine assembly |
-
2017
- 2017-08-24 DE DE102017214791.1A patent/DE102017214791B4/de active Active
-
2018
- 2018-07-12 WO PCT/EP2018/068925 patent/WO2019037942A1/de not_active Ceased
- 2018-07-12 CN CN201880037612.4A patent/CN110709585A/zh active Pending
- 2018-07-12 EP EP18740574.1A patent/EP3673155A1/de not_active Withdrawn
-
2020
- 2020-01-17 US US16/745,491 patent/US20200149444A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010020458A1 (en) * | 2000-03-09 | 2001-09-13 | Toyota Jidosha Kabushiki Kaisha | Valve characteristic control apparatus of internal combustion engine and methods of controlling valve characteristics |
| DE102014221794A1 (de) * | 2014-10-27 | 2016-04-28 | Schaeffler Technologies AG & Co. KG | Hubvariabler Ventiltrieb eines Verbrennungsmotors |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2019037942A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017214791A1 (de) | 2019-02-28 |
| WO2019037942A1 (de) | 2019-02-28 |
| US20200149444A1 (en) | 2020-05-14 |
| DE102017214791B4 (de) | 2025-07-31 |
| CN110709585A (zh) | 2020-01-17 |
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Legal Events
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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