EP4045774A1 - Balkenartige brücke für einen ventiltrieb einer heavy-duty-brennkraftmaschine - Google Patents
Balkenartige brücke für einen ventiltrieb einer heavy-duty-brennkraftmaschineInfo
- Publication number
- EP4045774A1 EP4045774A1 EP20775175.1A EP20775175A EP4045774A1 EP 4045774 A1 EP4045774 A1 EP 4045774A1 EP 20775175 A EP20775175 A EP 20775175A EP 4045774 A1 EP4045774 A1 EP 4045774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bridge
- longitudinal
- crosshead
- gas exchange
- transverse wall
- 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
- F01L1/26—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
- F01L2301/00—Using particular materials
-
- 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
Definitions
- the invention relates to a bar-like bridge for a valve drive of a heavy-duty internal combustion engine for the transmission of a cam lift to two gas exchange valves that act in the same way,
- which bridge is a one-piece, stamping and bending technology made of sheet steel hollow body with an inverted U-profile, formed by a transverse wall with from Side walls depending on their longitudinal edges, which transverse wall, starting from the longitudinal ends of the bridge, each have a plateau and at their Llindmit te a raised contact zone for an at least indirect cam counter-rotation, which plateaus are verbun with the contact zone via a roof section each, with an underside the transverse wall, at the longitudinal ends, each has a gas exchange valve contact surface.
- a “heavy-duty internal combustion engine” is to be understood as a machine as it is used in particular to drive a truck, van, light transporter, agricultural equipment, ship, mining or construction site equipment, etc.
- a bridge for a valve train of a heavy-duty internal combustion engine is shown in DE 20 2019 103 327 U1.
- the gas exchange valve con tact surfaces are arranged on the underside of the plateaus.
- the transverse wall is provided in the region of the longitudinal center with a right corner-like contact zone, which is connected to the plateaus via pieces of plate.
- the task is to create a bridge as mentioned above, which is very inexpensive, easily builds and at the same time can be used between high vertical distances from its contact zone to the gas exchange valve surfaces.
- this object is achieved in that the plateaus each have a rectangular channel-like central section which is lowered by deep-drawing relative to the longitudinal edges, the longitudinal walls of which with their outer surfaces are vertically in front of the inner sides of the transverse walls, the gas exchange selventiltim inhabit lying on the lower surfaces of the central sections of the plateaus, where in which the roof sections are spherical segment-like and the side walls at the longitudinal ends of the bridge taper off unconnected-free.
- the high distance to be bridged between the contact zone for the at least indirect counter-cam on the upper side and the valve contact surfaces on the lower side of the transverse wall of the bridge is, while maintaining the generally inverted U-shape of the bridge, now cleverly lowered by the two rectangular channel-like lowered, post-shaped sections achieved plateaus.
- the bridge should have a wall thickness of 2 - 10 mm, based on its base body without the lowered center cuts.
- a thick sheet metal construction with a thickness of about 4-6 mm is particularly preferred here.
- a downwardly curved guide tab can protrude from at least one longitudinal end, on the inside of which a gas exchange valve guide follows.
- additional securing elements such as clips or the like can be attached in this area.
- the contact zone on the top of the bridge circular. If necessary, the contact zone can also have an elliptical shape. It can also be spherically bulged and / or. re-embossed and / or be provided with an applied hard material layer.
- FIG. 1 shows a three-dimensional view of the bridge in its general design after its first drawing step
- Figure 2 shows the bridge as mentioned above, in the final representation with channels and molded into the plateau
- Figure 3 shows a partial view of the bridge with an optional, end guide tab.
- FIG. 2 shows a beam-like bridge 1 made of sheet steel for a valve drive of a heavy-duty internal combustion engine.
- Bridge 1 is used to simultaneously transfer a cam lift to two gas exchange valves with the same effect and is Compared to a cylinder head of the internal combustion engine not guided on columns or the like.
- the bridge 1 can be made of thick sheet metal with a wall thickness of 4 mm, but a total area of approximately 2-10 mm is intended.
- the bridge 1 is stamped and bent in at least two successive drawing stages, with FIG. 1 showing the bridge 1 after its essential drawing stage in its U-shape which is inverted in cross-section.
- the bridge 1 has an overhead transverse wall 3, from the longitudinal edges 9a side walls 4 depend.
- the bridge 1 thus forms a hollow body.
- the contact zone 6 has a recognizable circular shape and is slightly arched.
- the transverse wall 3 has, starting from the longitudinal ends 8 of the bridge 1, a plateau 10 each. A connection of the plateaus 10 to the contact zone 6 is realized via easily deep-drawable, spherical segment-like roof sections 11.
- FIG. 3 shows a variant in which a guide tab 17 is bent off at one or both ends of the bridge 1, via which an additional longitudinal fixation / guidance of the bridge 1 can take place on the gas exchange valves.
- the bridge 1, with one size can be adapted to different valve spacings via different cut depths of the guide tabs 17 on the transverse wall 3.
- FIG. 2 shows the bridge 1 after a supplementary drawing step which, if necessary, can also be integrated into the preceding drawing step described above.
- Dem- According to each plateau 10 of the transverse wall 3 has a rectangular channel-like central section 12 that is lowered compared to the longitudinal edges 9a.
- the arrows drawn in thick in FIGS. 1, 2 symbolize the essential drawing directions in the vertical Longitudinal walls 13 of the lowered middle sections 12 in sections with their outer surfaces 14 in front of inner sides 15 of the transverse walls 3. If necessary, a visibly larger distance can be selected between these in order to keep the bending stresses in check .
- the two-ended gas exchange valve contact surfaces 9 run on lower surfaces 16 of the middle sections 12. Due to the lowered middle sections 12, comparatively high vertical distances between the counter-cam and the gas exchange valves can be "spanned" via the bridge 1, given its good deep-drawability.
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 |
|---|---|---|---|
| DE102019127878 | 2019-10-16 | ||
| PCT/DE2020/100788 WO2021073680A1 (de) | 2019-10-16 | 2020-09-10 | Balkenartige brücke für einen ventiltrieb einer heavy-duty-brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4045774A1 true EP4045774A1 (de) | 2022-08-24 |
| EP4045774B1 EP4045774B1 (de) | 2025-02-19 |
Family
ID=72561541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20775175.1A Active EP4045774B1 (de) | 2019-10-16 | 2020-09-10 | Balkenartige brücke für einen ventiltrieb einer heavy-duty-brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4045774B1 (de) |
| CN (1) | CN114364864B (de) |
| DE (3) | DE102020117126A1 (de) |
| WO (1) | WO2021073680A1 (de) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500600B1 (de) * | 2004-07-20 | 2007-09-15 | Avl List Gmbh | Brennkraftmaschine mit innerer verbrennung |
| DE102006002994A1 (de) * | 2006-01-21 | 2007-08-02 | Schaeffler Kg | Hebelartiger Nockenfolger |
| DE102007012797A1 (de) * | 2007-03-16 | 2008-09-18 | Schaeffler Kg | Kipphebel für einen Ventiltrieb einer Brennkraftmaschine |
| DE102008036874A1 (de) * | 2008-08-07 | 2010-02-11 | Schaeffler Kg | Ventiltrieb zum Ansteuern von Ladungswechselventilen einer Brennkraftmaschine |
| DE102009037496A1 (de) * | 2009-08-13 | 2011-02-17 | Schaeffler Technologies Gmbh & Co. Kg | Ventiltrieb einer Brennkraftmaschine |
| DE102010011455A1 (de) | 2010-03-15 | 2011-09-15 | Schaeffler Technologies Gmbh & Co. Kg | Hubkolbenbrennkraftmaschine mit einstellbarem Aufpumpelement |
| DE102013222436A1 (de) * | 2013-11-05 | 2015-05-07 | Schaeffler Technologies Gmbh & Co. Kg | Betätigungshebel für Gaswechselventile von Hubkolbenbrennkraftmaschinen |
| DE102014224625A1 (de) * | 2014-12-02 | 2016-06-02 | Schaeffler Technologies AG & Co. KG | Ventilbetätigungshebel für Hubkolbenbrennkraftmaschinen |
| DE102015211124A1 (de) * | 2015-06-17 | 2016-12-22 | Schaeffler Technologies AG & Co. KG | Ventiltrieb einer Hubkolbenbrennkraftmaschine |
| DE202019101904U1 (de) | 2019-04-03 | 2019-04-23 | Schaeffler Technologies AG & Co. KG | Balkenartige Brücke für einen Ventiltrieb einer Heavy-Duty-Brennkraftmaschine |
| DE202019103327U1 (de) | 2019-06-13 | 2019-06-19 | Schaeffler Technologies AG & Co. KG | Balkenartige Brücke für einen Ventiltrieb einer Heavy-Duty-Brennkraftmaschine |
-
2020
- 2020-06-30 DE DE102020117126.9A patent/DE102020117126A1/de active Pending
- 2020-06-30 DE DE202020006029.1U patent/DE202020006029U1/de active Active
- 2020-09-10 EP EP20775175.1A patent/EP4045774B1/de active Active
- 2020-09-10 CN CN202080061254.8A patent/CN114364864B/zh active Active
- 2020-09-10 DE DE112020004993.0T patent/DE112020004993A5/de not_active Withdrawn
- 2020-09-10 WO PCT/DE2020/100788 patent/WO2021073680A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN114364864A (zh) | 2022-04-15 |
| DE112020004993A5 (de) | 2022-11-03 |
| EP4045774B1 (de) | 2025-02-19 |
| DE202020006029U1 (de) | 2024-04-23 |
| WO2021073680A1 (de) | 2021-04-22 |
| CN114364864B (zh) | 2024-09-20 |
| DE102020117126A1 (de) | 2021-04-22 |
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