EP2861838A1 - Schiebenockensystem einer hubkolbenbrennkraftmaschine mit x- förmig angeordneten schiebenuten und führungselementen - Google Patents
Schiebenockensystem einer hubkolbenbrennkraftmaschine mit x- förmig angeordneten schiebenuten und führungselementenInfo
- Publication number
- EP2861838A1 EP2861838A1 EP13719091.4A EP13719091A EP2861838A1 EP 2861838 A1 EP2861838 A1 EP 2861838A1 EP 13719091 A EP13719091 A EP 13719091A EP 2861838 A1 EP2861838 A1 EP 2861838A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion engine
- internal combustion
- sliding
- switch blades
- sliding cam
- 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- Withdrawn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 15
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 210000002105 tongue Anatomy 0.000 description 4
- 241001433879 Camarea Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000007704 transition Effects 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
- 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
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
-
- 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
- Reciprocating internal combustion engine with at least one camshaft with at least one sliding cam element with sliding cam and X-shaped intersecting sliding grooves, wherein the sliding cam element with an internal toothing on a toothed shaft rotatably but axially displaceable and wherein between the sliding grooves a guide member is fixed, the elastically movable Having switch points, which are guided on a pivot plate mounted in the pivoting area, and with an actuator device with at least one movable out of a housing actuator pin, wherein the actuator device to a component of a cylinder head or on the cylinder head of the reciprocating internal combustion engine can be fastened and the Aktorit after his move out with at least one sliding groove of the sliding cam element comes into contact.
- Such a sliding cam system with guide element is known from DE-10 2008 024 91 1 A1.
- the guide member is formed as a nearly circular ring which is hinged to the ends of the switch blades on a pivot plate.
- the Guide element has on its side facing away from the pivot plate an inward extension, with which it is inserted in a groove in the cam base.
- the problem is that it must be widened very far in order to be able to be pushed with the free ends of the switch blades on the groove or the base circle of the sliding grooves, so that a plastic deformation of the guide element is to be feared.
- the guide element is used only on a small part of the inner circumference in the groove in the sliding groove bottom, so that the free switch blades are designed to be very long, whereby the guiding force is reduced when moving the sliding cam elements. Even if the ends of the switch blades are supported on the flanks of the X-shaped crossing region, there is a risk that they bend unduly on the free stretch before this support.
- the object of the invention is therefore to design and improve the sliding cam element and the guide element in such a way that the disadvantages described are avoided and a permanent displacement of the sliding cam elements via the slide grooves or the switch tongues is possible without the exact displacement of the sliding elements is at risk and damage the guide element or the switch blades. This should be done with simple inexpensive means.
- the guide element is designed as a C-shaped executed spring and is fixed at least with its ends to the toothed shaft.
- the C-shaped spring is not bent at all must be in order to be fixed to the toothed shaft.
- the C-shaped spring which is also referred to as C-spring, is inserted into a recess in Verschiebenuten ground between the sliding grooves, so that the C-spring after pushing the sliding cam element on the toothed shaft via the attached to the ends of the inner teeth on the C spring is held.
- the C-spring is therefore fixed independently of the sliding cam element on the toothed shaft.
- the incision in the displacement groove bottom of the sliding cam element is incorporated substantially up to the axis of the sliding cam element or the center of the toothed shaft, so that the C-spring, which comprises an angle of approximately 180 °, is provided on its entire inner surface with internal teeth.
- the C-spring has an inner closed arc and an outer arc interrupted to form the switch blades. This gives the C-shaped spring a secure hold in the incision, because the inner arch is located in the incision. Due to the encircling inner arch, it is possible to fix the switch blades anywhere on the inner arch and thus adjust the spring stiffness and the elasticity of the switch blades arbitrarily.
- the interruption in the outer arc or the distance between the ends of the switch blades can be effected by a radial separating cut, wherein the ends of the switch blades can lean on the outer edges of the sliding grooves in the crossing region.
- the free ends of the switch blades have lateral chamfers.
- the incision widens in the direction of the crossing area on both sides thereof.
- This extension can be done in the circumferential direction from the beginning of the incision ago, but he can also use later.
- the flanks of the extension are adapted to the Auslenkweg the switch blades, so that the switch blades experienced in the direction of the crossing area a steady support, can absorb high forces and ensure along the way accurate guidance for Aktorit.
- the fatigue strength increases considerably.
- the rigidity of the support of Aktorstattes is significantly improved.
- the guide element and in particular the switch blades can also be made thinner, so that also increases their durability.
- the switch blades are sufficiently thin, so the lateral phases can be omitted at the free ends of the switch blades.
- the extensions of the sliding groove base radially to the internal teeth of the sliding cam element obliquely narrowing or perpendicular to the tooth shaft axis incorporated, the inner arc of the C-spring is also elastically guided along the extensions, so that the transition between the inner arc and the switch blades is loaded less and thus the flexural rigidity is improved.
- the switch blades can be made monostable, so that after passage of the Aktorstattes through the crossing area again set in the middle of the X - shaped intersection of the sliding grooves.
- the switch tongues can also be made bistable, so that they remain in this pivoted position after passage of Aktorstattes and preferably bear with their ends on the flanks of the sliding grooves.
- the bistability can be achieved by suitable shaping of the switch blades, for. B. by beads or indentations, by multi-layer materials or by a tangential bias of the switch blades in particular the projections in the direction of the pivot plate done.
- the projections are supported in the
- FIG. 1 shows a perspective view of a sliding groove region of a sliding cam element with actuator pin
- 1 generally designates a sliding groove region, in which two displacement grooves 2 and 2a which intersect in an X-shape are incorporated.
- the sliding groove portion 1 may be designed as a separate crank disc which is connected to the sliding cam element, but it may also form a unit with the sliding cam element, so that the sliding cam and the sliding groove portion are arranged side by side.
- an incision 3 is incorporated, which, in particular Figure 3 can be seen, extends to the central axis of the sliding cam member.
- the sliding cam element has at the inner opening an internal toothing 4, which fits to a toothed shaft 5.
- a C-shaped spring 6, also called C-spring is used.
- the C-spring 6 has internal teeth 7, which correspond to the internal teeth 4 on the sliding cam element and also engage in the toothed shaft 5, so that a larger number of internal teeth 7 provide for a radial clamping of the C-spring on the toothed shaft 5.
- the C-spring 6 has an inner arc 8, which is made closed, and an outer interrupted arc 9, which forms switch blades 10 and 10a, which are attached to the ends of the inner bow 8 and at their free ends chamfers 14, 14a for better contact with the flanks of the sliding grooves 2, 2a in the crossing region.
- the inner arc 8 projects so far into the incision 3, that it is guided in the recess axially to the axis of the sliding cam member.
- the switch blades 10 and 10a have in the region of their ends inwardly directed projections 1 1 and 1 1 a, which fit in openings of a pivot plate 12, so that the two switch blades 10 and 10 a are guided over the pivot plate 12 against each other.
- the pivot plate 12 is, as can be seen in Figures 1 to 3, embedded in a recess in the sliding groove bottom in the crossing region of the sliding grooves 2 and 2 and guided there.
- an actuator pin 9 moves in one of the sliding grooves 2 or 2 a and approaches the crossing region, one of the switch blades 10 or 10 a is displaced and the other switch blade is pivoted in the other direction via the rotary joint plate 12 that the actuator pin 9 guided by the switch blades 10 and 10a can change from one to the other sliding groove.
- the gear ratio of the apertures in the pivot plate 12 can be varied to compensate for variations in the movement of the ends of the switch blades 10 and 10a caused by fits in the transmission of movement from one switch tongue to the other switch tongue can.
- the incision 3 extends in the direction of the intersection region on both sides thereof, whereby the extensions 15 and 15a can start later at the beginning of the incision 3, but also in the circumferential direction.
- the switch blades 10 and 10a are arranged so that they protrude radially into the extensions 15, 15a so that they undergo successive support in the extensions in accordance with the shape of the flanks of the extensions 15, 15a.
- the support force of the switch blades 10, 10a relative to the actuator pin 9 is substantially improved, wherein the flanks of the extensions 15, 15a are designed so that a steady jerk-free support of the switch blades 10, 10a up to their support at the end on the flanks of the slide grooves.
- a rotary joint insert 13 is used there, which causes a guide of a radially outwardly resting on the rotary joint insert 13 pivot plate 12a.
- the rotary joint insert 13 can be omitted if the V - slot width of the extensions 15, 15a tapers so much that a sufficient support is possible for the pivot plate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanisms For Operating Contacts (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012210212.4A DE102012210212B4 (de) | 2012-06-18 | 2012-06-18 | Schiebenockensystem einer Hubkolbenbrennkraftmaschine mit X-förmig angeordneten Schiebenuten und Weichen |
| PCT/EP2013/058679 WO2013189644A1 (de) | 2012-06-18 | 2013-04-26 | Schiebenockensystem einer hubkolbenbrennkraftmaschine mit x- förmig angeordneten schiebenuten und führungselementen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2861838A1 true EP2861838A1 (de) | 2015-04-22 |
Family
ID=48190967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13719091.4A Withdrawn EP2861838A1 (de) | 2012-06-18 | 2013-04-26 | Schiebenockensystem einer hubkolbenbrennkraftmaschine mit x- förmig angeordneten schiebenuten und führungselementen |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9267395B2 (de) |
| EP (1) | EP2861838A1 (de) |
| CN (1) | CN104395567A (de) |
| DE (1) | DE102012210212B4 (de) |
| WO (1) | WO2013189644A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012212240A1 (de) | 2012-07-12 | 2014-01-16 | Schaeffler Technologies AG & Co. KG | Nockenwelle eines hubvariablen Ventiltriebs einer Brennkraftmaschine |
| DE102013201826A1 (de) | 2013-02-05 | 2014-08-07 | Schaeffler Technologies Gmbh & Co. Kg | Schiebenocken-Ventiltrieb einer Brennkraftmaschine |
| DE102014206478B3 (de) * | 2014-04-04 | 2015-08-20 | Schaeffler Technologies AG & Co. KG | Hubvariabler Ventiltrieb einer Brennkraftmaschine |
| DE102014215424B4 (de) | 2014-08-05 | 2016-02-25 | Schaeffler Technologies AG & Co. KG | Schiebenocken mit pinzettenförmiger Leitblechgeometrie in X-Nut und Schiebenockensystem |
| JP6233386B2 (ja) * | 2015-10-29 | 2017-11-22 | トヨタ自動車株式会社 | 可変動弁機構 |
| JP6233385B2 (ja) * | 2015-10-29 | 2017-11-22 | トヨタ自動車株式会社 | 可変動弁機構 |
| DE102016207616A1 (de) | 2016-05-03 | 2017-11-09 | Schaeffler Technologies AG & Co. KG | Variabler Ventiltrieb |
| US10868025B2 (en) | 2018-11-26 | 2020-12-15 | Sandisk Technologies Llc | Three-dimensional memory device including replacement crystalline channels and methods of making the same |
| DE102019203429A1 (de) * | 2019-03-13 | 2020-09-17 | Mahle International Gmbh | Kulissenführung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007037232A1 (de) * | 2007-08-07 | 2009-02-12 | Eto Magnetic Gmbh | Vorrichtung zur Nockenwellenverstellung einer Brennkraftmaschine |
| DE102008024911A1 (de) * | 2008-05-23 | 2009-11-26 | Schaeffler Kg | Ventiltrieb einer Brennkraftmaschine |
| DE102009007819A1 (de) | 2009-02-07 | 2010-08-12 | Schaeffler Technologies Gmbh & Co. Kg | Ventiltrieb einer Brennkraftmaschine |
-
2012
- 2012-06-18 DE DE102012210212.4A patent/DE102012210212B4/de not_active Expired - Fee Related
-
2013
- 2013-04-26 WO PCT/EP2013/058679 patent/WO2013189644A1/de not_active Ceased
- 2013-04-26 US US14/408,446 patent/US9267395B2/en not_active Expired - Fee Related
- 2013-04-26 EP EP13719091.4A patent/EP2861838A1/de not_active Withdrawn
- 2013-04-26 CN CN201380029831.5A patent/CN104395567A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013189644A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102012210212B4 (de) | 2014-12-11 |
| DE102012210212A1 (de) | 2013-12-19 |
| CN104395567A (zh) | 2015-03-04 |
| US9267395B2 (en) | 2016-02-23 |
| US20150184554A1 (en) | 2015-07-02 |
| WO2013189644A1 (de) | 2013-12-27 |
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Legal Events
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