CN101813011B - Switchable cup tappet - Google Patents
Switchable cup tappet Download PDFInfo
- Publication number
- CN101813011B CN101813011B CN201010002528.4A CN201010002528A CN101813011B CN 101813011 B CN101813011 B CN 101813011B CN 201010002528 A CN201010002528 A CN 201010002528A CN 101813011 B CN101813011 B CN 101813011B
- Authority
- CN
- China
- Prior art keywords
- outer body
- inner piece
- piston
- cup tappet
- 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.)
- Expired - Fee Related
Links
- 230000008878 coupling Effects 0.000 claims abstract description 24
- 238000010168 coupling process Methods 0.000 claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 230000000295 complement effect Effects 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 5
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 4
- 230000002000 scavenging effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000009423 ventilation 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
- F01L1/143—Tappets; Push rods for use with overhead 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
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
This invention provides a switchable cup tappet with a outer body. Said outer body has a bottom for contacting with the long stroke cam, where, a hollow cylindrical skirt is protruded from the bottom. A hollow cylindrical projection is guided far away from the inner edge area of the bottom and a inner part is guided in said protruded part, the bottom of the inner part is used for pushing the short- stroke cam. A coupling mechanism is operated inside the cup tappet, for the whole valve stroke, which can move from a containing place of one of the components and stepped move into or onto the corresponding follow-up surface of the other component, for the short valve stroke, which operates at the containing place. The bottom of the inner part has two sectors that are opposite to each other along the diameter direction and directly connected with the edge area of bottom of the case so as to form an enlarged rectangular push area in top view for the short stroke cam. The sectors are distributed in such a form that they sink to the complementary recessions in the bottom of outer body, when coupling is taking place, the bottom are at a approximate level.
Description
Technical field
The present invention relates to a kind of switchable cup tappet of the valve actuating gear for internal-combustion engine, this cup tappet has outer body, this outer body has the bottom for large stroke cam contact of similar annular, the liner of hollow cylinder stretches out from the outward edge of bottom, wherein, the directed bottom inward flange that leaves of bump of hollow cylinder, can with its shell, in the hole of described bump, be guided with respect to the inner piece of outer body axial motion, the bottom of inner piece is for promoting the device that acts on scavenging air valve for the face that deviates from bottom of little stroke cam and inner piece, wherein, coupling mechanism is arranged in cup tappet, for whole valve stroke [being switched to large stroke cam], this coupling mechanism can from the holding of one of member, shift out and range selector move on among servo-actuated of another member or on, wherein, for on the other hand less valve stroke [being switched to stingy door stroke], this coupling mechanism moves in holding place, wherein, outer body is loaded towards cam direction by the sky spring (Lost-Motion-Feder) of moving, and anti-twist mechanism stretches out from the shell of liner.
Background technique
Cup tappet from the known a kind of the above-mentioned type of DE4492633C1.In this cup tappet, disadvantageously, the bottom of the inner piece of this cup tappet can only provide for the displacement of little stroke cam relatively little area because its diameter is less when contacting.Therefore, under shutdown mode, only relatively little stroke operation.
Summary of the invention
Therefore task of the present invention is, completes a kind of switchable cup tappet of the above-mentioned type, by this cup tappet, can when measure-alike, under decoupling state, realize larger sub-stroke.
According to this task of the present invention, be resolved as follows,, the bottom of inner member have two opposed and be directly connected to the sector on the bottom edge region of inner piece shell on diameter, with be formed in plan view that similar rectangular area amplifies and for the promotion face of little stroke cam, wherein, sector distributes in the mode sinking in recess complementary in the bottom of outer body, and when coupling, be that two bottoms at least roughly distribute flushing with each other, or be that one of them bottom only exceeds another bottom slightly.
Therefore, have the cup tappet of the described type of beginning, the shortcoming being noted is eliminated in this cup tappet.Owing to having bead shape (lappenartig) and being connected to the sector on the bottom of inner member, during contact, the displacement area of cam is obviously expanded, and this sector is given the geometrical shape of bottom with similar rectangle in plan view.Therefore, can be than the larger sub-stroke of existing embodiment operation under decoupling pattern.
The stroke that the cup tappet proposing can be considered and be provided in quality adjustment formula internal-combustion engine and quantity regulating formula internal-combustion engine switches.Application scheme also relates to the internal-combustion engine of homogeneous charge compression ignite burning technology (HCCI)-combustion method.
In this article particularly advantageously, when (cam base circle) is coupled, the bottom that inner piece expands according to the present invention roughly or completely distributes with the bottom of outer body with flushing.Therefore, exist for example face of " smooth " to be used for the friction operation (Schleifbearbeitung) in working stroke.If desired, for friction process (Schleifvorgang), bottom surface can keep mutual aligning.Another advantage according to solution of the present invention is during the increase of cup tappet stroke, under decoupling pattern, to have the structure height identical with the cup tappet of implementing up to now.But, same feasible and be set to, for example the bottom of inner piece at cam base circle through the out-of-date bottom that exceeds slightly outer body.Yet this exceeds quality award from the ministry choosing is significantly less than bottom thickness half.
Preferably, the recess in outer body bottom can show as the molded portion connecting on diameter, and this molded portion is only defined by the sidewall that is parallel to the distribution of cam direction of displacement.This scheme especially simply and does not for example produce unnecessary material recess and material stacking in manufacturing technology when sheet material forms.The radially external distolateral of sector surrounded by recess if desired.
Particularly advantageously, two bottoms of cup tappet all towards cam direction of displacement cylindrical arch upward.Therefore, be further conducive to increase cam supporting surface.
In improvement project of the present invention, propose, by the below that place/servo-actuated is directly installed in bottom that holds at least one coupling mechanism.Coupling mechanism can be for example at least one piston, but wherein, is to be more suitably furnished with to amount to two pistons, and these two pistons can be for example exist with the form of push rod group (Schieberpaket).As an alternative, holding place/servo-actuated can also obviously with on the axial direction part of bottom maintenance spacing distributing at cup tappet.Can consider and arrange equally, the axis that holds place/servo-actuated is not to distribute diametrically in cup tappet, but secant formula ground or distribute obliquely.Similarly, on this position, also can consider and arrange other coupling mechanism, such as ball, key, roller etc.
Can under pressure-less state, there is lockedly and just occupy its decoupling state in coupling mechanism under hydraulic medium pressure-acting.Be set to equally, under pressure-less state, show as release, so wherein, under hydraulic medium pressure-acting, realize locking.
Finally propose, arrange at least one with one heart around the helical compression spring of inner piece as the sky spring of moving.If desired, this helical compression spring also can directly be supported on the member of cylinder head side.
Accompanying drawing explanation
By means of accompanying drawing, describe the present invention in detail.Wherein:
Fig. 1 illustrates the sectional arrangement drawing with the cup tappet of coupling piston;
Fig. 2 illustrates the plan view according to the cup tappet of Fig. 1, and
Fig. 3 illustrates the sectional drawing according to Fig. 1, but has turned over 90 °.
Embodiment
A kind of switchable cup tappet 1 has been described.This cup tappet is comprised of outer body 2, and this outer body 2 has the bottom 3 of similar annular in cam side.Thin wall-type liner 5 is 3 outward edge 4 from bottom, and this liner 5 has can know the anti-twist mechanism 20 of seeing from Fig. 2.
The bump 7 of the hollow cylinder with porose 8 from bottom 3 inward flange 6 to the direction guiding away from cam.In hole 8, accommodate the inner piece 9 that can move in the axial direction with respect to hole 8 with its shell 10.Inner piece 9 has bottom 11, and this bottom 11 is passed through and under couple state, roughly finishes (see below continue bright) with aforesaid bottom 3 with flushing at cam base circle.
The bottom 3 of outer body 2 can be contacted by the large stroke cam of two maintenance spacing, and these two large stroke cam are trapped among a little stroke cam between the two, and this little stroke cam acts on the bottom 11 of inner piece 9.Arrow indication AN in Fig. 2 represents the direction of displacement of cam on bottom 3,11.
In addition from Fig. 1, can learn, for hold place 14,15 and servo-actuated 16,17 of coupling mechanism 13, be located immediately at 3,11 below, bottom.Just in time be provided with two piston 13a, 13b.Piston 13a is positioned at and locates 14 (left sides) opposite through out-of-date direct the first outer end 25 with its inner side the 24 and second piston 13b at cam base circle holding of outer body 2.The second piston 13b almost or completely extends on the whole width of inner piece 9.The second outer end 28 of the second piston 13b coupling situation inferior segment segmentation move in servo-actuated 17 in outer body 2, wherein, first piston 13a range selector ground embeds in servo-actuated 16 of inner piece 9 in addition, and at this, simultaneously mobile the second piston 13b.
Coupling mechanism group 13a, the 13b passing in aforementioned coupling direction is by the loading of pressure chamber 26 is carried out, before this pressure chamber 26 is externally positioned at the outside 27 of first piston 13a diametrically.Return (decoupling) arranges by the power of at least one pressure spring 29, these pressure spring 29 range selector ground are around the shell 30 of the second piston 13b, and with its one end be supported on the second piston 13b in the annular neck portion 31 of first piston 13a, and be supported on and hold in place's annular flange flange 32 of 15 with its other end.
In addition Fig. 1 and Fig. 3 disclose a kind of with one heart around the sky of inner piece 9 spring 18 of moving.This sky move that spring 18 is constituted as helical compression spring and with its end effect on discoid pieces 33, discoid pieces 33 away from cam be fixed on the shell 10 of inner piece 9.Utilize the other end of the empty spring of moving indirectly to be worked in the bottom side 34 of outer body 2.
The bottom 11 of inner member 9 has the sector 22 on the fringe region 21 of two opposed on diameter, bottom sides of being directly connected to shell 10.Sector 22 is placed in the complementary recess 23b of outer body 2.Recess 23b shows as on diameter and connects, and therefore the bottom 11 with sector 22 is being parallel between the sidewall 35 of cam direction of displacement distribution.In addition, can find out, bottom 3,11 approximately mutually flushes in cam base circle, thereby has realized the friction operation in working stroke for example here.
The prolongation of the displacement face of the little stroke cam realizing due to the sector 22 by flushing on bottom 11 can (little stroke cam is effective) realize larger valve stroke/ventilation cross section under decoupling pattern.
As disclosed in Fig. 3, in addition two bottoms 3,11 towards cam direction of displacement AN cylindrical arch upward, this is further conducive to increase cam supporting surface.
reference numerals list
1 cup tappet
2 outer body
3 bottoms
4 outward edges
5 liners
6 inward flanges
7 bumps
8 holes
9 inner pieces
10 shells
11 bottoms
12 deviate from the face of bottom
13 coupling mechanisms
13a first piston
13b the second piston
14 hold place
15 hold place
16 servo-actuated
17 servo-actuated
The 18 skies spring of moving
19 shells
20 anti-twist mechanisms
21 fringe regions
22 sectors
23 promotion faces
23b recess
24 inner sides
25 first outer ends
26 pressure chambers
27 outsides
28 second outer ends
29 pressure springs
30 shells
31 annular neck portions
32 annular flange flange
33 discoid pieces
34 bottom sides
35 sidewalls
AN) moving direction of little stroke cam
Claims (5)
1. for the switchable cup tappet (1) of the valve actuating gear of internal-combustion engine, this cup tappet (1) has outer body (2), this outer body (2) has the bottom (3) for large stroke cam contact of annular, and the liner of hollow cylinder (5) stretches out from the outward edge (4) of described bottom (3), wherein, the bump of hollow cylinder (7) is directed away from the inward flange (6) of described bottom (3), can with its shell (10), in the hole (8) of described bump (7), be guided with respect to the inner piece (9) of described outer body (2) axial motion, the bottom (11) of described inner piece (9) for the face (12) that deviates from self bottom (11) that promotes little stroke cam and described inner piece (9) with acting on the device of scavenging air valve, wherein, coupling mechanism (13) moves in described cup tappet (1), for the whole valve stroke that is switched to large stroke cam, described coupling mechanism (13) can from holding of one of described outer body and inner piece (2,9) in (14,15), shift out and range selector move on in described outer body and inner piece (9,2) among corresponding another servo-actuated (16,17) or on, wherein, for the less valve stroke that is switched to stingy door stroke, described coupling mechanism (13) moves in holding place (14,15) described, wherein, described outer body (2) is loaded towards cam direction by the sky spring (18) of moving, and wherein, anti-twist mechanism (20) stretches out from the shell (19) of described liner (5), it is characterized in that, the described bottom (11) of described inner piece (9) have two opposed and be directly connected to the sector (22) on the fringe region (21) of bottom side of described shell (10) of described inner piece (9) on diameter, to be formed for promotion face (23) little stroke cam, that rectangular area expands in plan view, wherein, in the complementary recess (23b) of described sector (22) in the described bottom (3) of described outer body (2), sunk ground distributes, and wherein, when coupling, or be that described bottom (3,11) at least roughly distributes flushing with each other, or be that one of them bottom (11,3) exceeds another bottom (3,11) slightly, and wherein, be provided with just in time two pistons as the coupling mechanism (13) that is push rod group form, wherein, first piston (13a) is placed in holding in place (14) of described outer body (2), and the second piston (13b) distributed in the mode of almost extending on the whole diameter of described inner piece (9) in holding in place (15) of described inner piece (9), wherein, the inner side (24) of described first piston (13a) is opposite through out-of-date the first outer end (25) direct and described the second piston (13b) at cam base circle, wherein, the coupling of the shell (10) of described outer body (2) and inner piece (9) realizes by hydraulic medium, described hydraulic medium can be imported in pressure chamber (26) before, outside (27) in described first piston (13a), thereby described first piston (13a) is accompanied by the passing of described the second piston (13b) range selector ground embed described inner piece (9) described in hold in described servo-actuated (16) at place (15), and described the second piston (13b) with its second outer end (28) with described in described outer body (2), hold place (14) opposed described servo-actuated (17) on diameter and move into described outer body (2), and wherein when cutting off/reducing hydraulic medium pressure, by pressure spring power, realized the decoupling of the shell (10) of described outer body (2) and inner piece (9), pressure spring (29) works facing to the annular neck portion (31) of described the second piston (13b) around the shell (30) of described the second piston (13b) and with the end towards described first piston (13a) of described pressure spring (29), and works facing to the annular flange flange (32) of holding in place (15) described in described inner piece (9) at the other end.
2. by cup tappet claimed in claim 1 (1), it is characterized in that, the recess (23b) in the described bottom (3) of described outer body (2) shows as the molded portion connecting on diameter.
3. by the cup tappet (1) described in claim 1 or 2, it is characterized in that, described bottom (3,11) towards cam direction of displacement cylindrical arch upward.
4. by cup tappet claimed in claim 1 (1), it is characterized in that, for holding place (14,15)/servo-actuated (16,17) described in one or more described coupling mechanisms (13), directly in described bottom, the below of (3,11) distributes, wherein, described in each, coupling mechanism (13) shows as piston.
5. by cup tappet claimed in claim 1 (1), it is characterized in that, arrange at least one below in the described bottom (11) of described inner piece (9) around the helical compression spring of described inner piece (9) as the sky spring (18) of moving, described helical compression spring is clamped between the discoid pieces (33) and at least indirectly bottom side (34) of described outer body (2) on the described shell (10) that is fixed on described inner piece (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910004746 DE102009004746A1 (en) | 2009-01-15 | 2009-01-15 | Switchable bucket tappets |
| DE102009004746.8 | 2009-01-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813011A CN101813011A (en) | 2010-08-25 |
| CN101813011B true CN101813011B (en) | 2014-07-23 |
Family
ID=42107853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010002528.4A Expired - Fee Related CN101813011B (en) | 2009-01-15 | 2010-01-08 | Switchable cup tappet |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2208868B1 (en) |
| CN (1) | CN101813011B (en) |
| DE (1) | DE102009004746A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011085239A1 (en) * | 2011-10-26 | 2013-05-02 | Schaeffler Technologies AG & Co. KG | Roller plunger for use in e.g. high-pressure fuel pump of combustion engine, has housing guided in component hole over outer jacket, which is curved-out of housing, where edge region of housing is provided with slippage chamfer |
| DE102017101806A1 (en) | 2017-01-31 | 2018-08-02 | Schaeffler Technologies AG & Co. KG | Switchable bucket tappets |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345904A (en) * | 1990-02-16 | 1994-09-13 | Group Lotus | Valve control means |
| US5651335A (en) * | 1993-05-04 | 1997-07-29 | Ina Walzlager Schaeffler Kg | Valve tappet |
| US5709180A (en) * | 1997-02-06 | 1998-01-20 | General Motors Corporation | Narrow cam two-step lifter |
| US6457445B1 (en) * | 2000-05-23 | 2002-10-01 | Mitsubishi Denki Kabushiki Kaisha | Valve lift control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10055595A1 (en) * | 2000-11-09 | 2002-05-29 | Ina Schaeffler Kg | The cylinder shutoff has cylinders with gas exchange valves, cam shaft, driven by crank shaft, two cams, and valve drive element |
| JP2003148117A (en) * | 2001-11-16 | 2003-05-21 | Nissan Motor Co Ltd | Variable valve train for internal combustion engines |
-
2009
- 2009-01-15 DE DE200910004746 patent/DE102009004746A1/en not_active Withdrawn
- 2009-12-11 EP EP20090178953 patent/EP2208868B1/en not_active Not-in-force
-
2010
- 2010-01-08 CN CN201010002528.4A patent/CN101813011B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5345904A (en) * | 1990-02-16 | 1994-09-13 | Group Lotus | Valve control means |
| US5651335A (en) * | 1993-05-04 | 1997-07-29 | Ina Walzlager Schaeffler Kg | Valve tappet |
| US5709180A (en) * | 1997-02-06 | 1998-01-20 | General Motors Corporation | Narrow cam two-step lifter |
| US6457445B1 (en) * | 2000-05-23 | 2002-10-01 | Mitsubishi Denki Kabushiki Kaisha | Valve lift control device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2003-148117A 2003.05.21 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009004746A1 (en) | 2010-07-22 |
| EP2208868B1 (en) | 2015-02-25 |
| EP2208868A2 (en) | 2010-07-21 |
| EP2208868A3 (en) | 2010-08-11 |
| CN101813011A (en) | 2010-08-25 |
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Owner name: SCHAEFFLER KG Free format text: FORMER OWNER: FAG KUGELFISCHER AG + CO. OHG Effective date: 20100909 |
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| C14 | Grant of patent or utility model | ||
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Owner name: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Effective date: 20150723 |
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Owner name: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG Free format text: FORMER NAME: SCHAEFFLER FIFTH INVESTMENT MANAGEMENT GMBH + CO., KG Owner name: SCHAEFFLER TECHNOLOGY GMBH + CO. KG Free format text: FORMER NAME: SCHAEFFLER TECHNOLOGIES GMBH + CO. KG |
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| CP01 | Change in the name or title of a patent holder |
Address after: German Herzogenaurach Patentee after: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG Address before: German Herzogenaurach Patentee before: Fifth Schaeffler investment management GmbH & Co.KG Address after: German Herzogenaurach Patentee after: SCHAEFFLER TECHNOLOGIES AG & CO.KG Address before: German Herzogenaurach Patentee before: SCHAEFFLER TECHNOLOGIES GmbH & Co.KG |
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Granted publication date: 20140723 Termination date: 20200108 |
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| CF01 | Termination of patent right due to non-payment of annual fee |