CA2479264C - Switching element for a valve drive of an internal combustion engine - Google Patents
Switching element for a valve drive of an internal combustion engine Download PDFInfo
- Publication number
- CA2479264C CA2479264C CA2479264A CA2479264A CA2479264C CA 2479264 C CA2479264 C CA 2479264C CA 2479264 A CA2479264 A CA 2479264A CA 2479264 A CA2479264 A CA 2479264A CA 2479264 C CA2479264 C CA 2479264C
- Authority
- CA
- Canada
- Prior art keywords
- bore
- recess
- pistons
- switching element
- external part
- 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
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
- F01L13/0031—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 by modification of tappet or pushrod length
-
- 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
- F01L1/146—Push-rods
-
- 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
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
- F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
- F01L1/245—Hydraulic tappets
-
- 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
- F01L13/0005—Deactivating valves
-
- 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
- F01L2305/00—Valve arrangements comprising rollers
Abstract
The invention relates to a switching element (1) for a valve gear of an internal combustion engine, preferably for shutting off valves. Said valve comprises an external part (2), in addition to an internal element (5) that can be axially displaced in the bore (3) of said external part, said external part (2) and internal element (5) having at least one respective recess (7, 8) that lie in alignment with and at an axial distance from one another in a relative position that is achieved by a lost motion spring (6). In one of the recesses, coupling means (9), which are used for coupling the internal element (5) to the external part (2) in said relative position and which can be displaced in the direction of the other recess, are allocated to one another.
Two pistons (10) are provided as the coupling means (9), said pistons running in the recess (8) that is configured as a radial bore of the internal element (5) and lying diametrically opposite one another. The recess (7) of the external part (2) is configured as an annular groove (16) in the bore (3) of said part and sections of the underside (17) of the pistons (10), which faces away from the cams, have a flat transversal surface (14), originating from the radially external front face (13) of said underside and acting as a contact area for a facing annular surface (15) of the annular groove (16). The pistons (10) are guided in the internal element (5) by means of an anti-torsion mechanism (19). The invention provides a switching element (1) that comprises a simply constructed coupling mechanism, which creates negligible stress on the components.
Two pistons (10) are provided as the coupling means (9), said pistons running in the recess (8) that is configured as a radial bore of the internal element (5) and lying diametrically opposite one another. The recess (7) of the external part (2) is configured as an annular groove (16) in the bore (3) of said part and sections of the underside (17) of the pistons (10), which faces away from the cams, have a flat transversal surface (14), originating from the radially external front face (13) of said underside and acting as a contact area for a facing annular surface (15) of the annular groove (16). The pistons (10) are guided in the internal element (5) by means of an anti-torsion mechanism (19). The invention provides a switching element (1) that comprises a simply constructed coupling mechanism, which creates negligible stress on the components.
Description
(0001) SWI'I'CHING ELEMENT k'OR A VALVE DRIVE OF AN INTERNAL
COMDUSTrON ENGINE
COMDUSTrON ENGINE
[0002]
[0003) [0004] &E~.CKGROUND
[0006] The invention relates to a switching element for a valve drive of an internal combustion engine, preferably for shutting off valves, with an external part in whdse bore an inner element is axially movable, the external part and tha inner element having at least one respective mutually aligned recess due to an axially spaced relative position obtained by a lost motion spring, and in one of the recesses, facing in tkie direction of the other recess, displaceable coupling means are mutually applied in the relati~re position for coupling the inner element with the external part.
[0006] Such a switching element, constructed here as a cam follower iu a tappet push rod gear, is known from DE 199 1C 531. It is disadvantageous in this that only one piston is provided as the coupling means. It is clear to one skilled in the art that there is a high component loading in the coupling region because of the single piston coupling. There is also a relatively great danger of tilting of the inner element with respect to the external part. It is disadvantageous that a bore is provided as the recess into which the piston travels as coupling means. An extremely undesired edge loading can occur here when the coupling means travels out insufficiently, because of the special penetration of the bodies.
[00071 SttIdMARY
[0008] The object of the invention is therefore to provide a switching element of the kind mentioned at the beginning, in which the cited disadvantages are eliminated with simple means.
[0009) This object is attained according to the invention in that tWO pistons are provided as coupling means, which travel in the recess formed as a radial bore of the inner element, and which diametrically oppose one anotb.er there, the recess of the external part being formed there ae an anzwlar groove in the 'bore, and the piston at its underside remote firora the cam, starting from its radially eternal en.d face, aect~.or~ally has a planar transverse szu-face as contact region to a facing annular surface of the annular groove, and the piston being guided in a rotationally secure manner in the inner element.
[0010] A switching element with a very secure coupling mechanism is hereby provided. The component loading, and likeWi~se the tilting movement, are greatly reduced by the two-piston locking. On the other hand it is to be observed that a coupling aperture which is easy to make is presexit in the exte~cnal part because of the recess in the external part being formed as a peripheral annulax groove.
According to the invention, the pistons have on their underside a planar surface as contact region for the annular groove, eo that the surface pressure is greatly reduced here. In other words, txurough the measures according to the i~rmention, the cam stroke is transferred to the inner part over very large bearing surfaces.
If necesearp, more than two coupling means can be arranged in the inner element;
preferably these are then symmetrically distributed, [0011] So that the planar transverse surface is always in contact with the annular surface of the annular groove, the pistons are fated against rotation in their recess by means of a simple rotational securement. Here, in one specific embodiment of the invention, for example, a surrounding snap ring is present enclosing the inner element and on which the cross section of the piston abuts in the recess region. The pistons can of course be themselves secured agaix~ rotation in their recess by means of flats oar spring groove embodiments.
(0012) An a further development of the invention, it is proposed to provide a stop for the piston in the inner element. ~'hie is arranged centrally, so that both pistons always have the same travel path 1'adially outward, (0013] Preferably the radial bore in the inner element is made as a through bore_ An offset or stepped construction ig however also conceivable, so that the said opting ring' yr a similar means can be dispensed with.
-2~
[0014] It is particularly adbantageous if the radially outward end face of the piston, at Ieast in the edge rsgion toward the transverse surface, has a curvature correlating with the bore of the inner element. It ie thus Blear that s good bearing region is already provided with even the smallest travel of the piston into the annular groove of the external part.
[0015] A further particularly preferrred embodiment of the invention relates to the end side of the piston connecting the transverse surface with the underside having a curvature correlating to the bore of the inner element, or being beveled Iike a roof. It is thus clear that by means of these simple measures the pistons can travel out radislly very far in the annular groove in the case of coupling, and thus form an outstanding support pattern.
[0016] The scope of this invention t'elates expressly to atll kinds of switcking elements in valve drives such as cam ~ollowera in tappet push rod drives, support elements for finger levers, buelrst tappets, etc.
[0017] BRIEF DESCRIPTION OF THE DR~A.WIN~GS
10018] The iaventioa is appropriately deset~bed with reference to the drawings.
j4029] Figure 1 is a longitudinal section through a switchixig element constructed as a xoller tappet according to the invention, [0020] figure 2 is a partial longitudinal section, turned through 90°
accordi-ng to Fig. Z, [0021] Figure 3 is a partial longitudinal section similar to Figure 2, [0022] Figure 4 is a bottom view of a piston as coupling means, [0023] Figure 5 ie a cross-sectional view of the piston, and 10024] figures fi and 7 show alternatsve exnbodinaents to Figures 4 and 5.
(0026) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] Figures 1-3 disclose a switching element 1 for a valve drive of an internal combustion engine. This is constructed here as a roller fiappet for a tappet push rod drive. It includes an eztern.al pelt 2, in whose bore 9 the external surface 4 _ _r__ ... __.
of an agally movable inner element ~ runs. The external part 2 and the Tuner element b are urged apart by a lost motion spring 6, not fux'ther described.
(002?] In the axially separated position of the external part 2 from the inner element 5 as described in the drawing, the recesses 7, 8 are mutually aligned.
The recess 7 of the external part 2 is made as a peripheral atlaular groove 2, The recess 8 in the inner element 5, on the contrary, is made as a through bore exteudi_ng radially. A path like a bowstring chord, or skew, is likewise conceivable.
(0028] Two diametrically opposed coupling means 9 are arranged in the recess 8 of the inner element 6. These are formed as pistons 10 here, and are urged span by a. co~oapression spring means 11. A stop for the pistons 10 is provided centrally is the recess 8. This is provided as an annular part such as a s~o~ap ring.
Thus in a decouplf ng position of the pistons 10, their central position and thus equal travel path is guaranteed.
(0029] As shown in detail in Figures 4-7, the pistons IO sectionally have a planar transverse surface 14 starting from their radially outer end face 13, This acts as contact region to a facing annular surface 15 (see h'igs 1-3) of the recess 7 formed as an annular groove. As can be seen, the coupling aperture in the external part 2 is formed circumferentially; this has manufacturing advantages, for example.
(0030] The and face 13 of the piston 10 can be curved, as shown in Figure 4, as can the bore 3 of the external part 2. Thus a good bearing pattern is immediately set up when the piston IO travels into the annular groove 36. So-called edge suppox-ts are effectively avoided, [0031] As can be seen from la5igures 4 and 6, an end side 18 of the piston 10 connecting the transverse surface 14 with an underside lT remote from the cam is likewise provided with a curvature correlating with the bore 3 of the external part 2 or, as shown in Figure 6, is beveled like a mof.
(00821 Since the transverse surfaces 14 of the pistons 10 have to be always facing the annular surface 15 of the annular groove 16 in the external part 2, a simple rotational securement 19 is provided for the pistons 10 (see Figure 2).
This comprises an annular part such as a snap ring, which is arranged in an annular groove 20 on the external surface 4 of the inner eleuient 5. The rotational sec~urement 19 runs at such a height as to engage under the transverse surface 14 of the pistons lo.
[0033] figure 3 shows an alternative measure to the central stop 12 for the pistons 10. This is provided here as a component 21 such as a pin, projecting orthogonally into the recess 8, formed as a radial bore, of the inner element 5.
[0084) Thus a switchipgr element is present which has a very secure and simply built coupling mechanism which produces only a very small component loading.
[0035] List of Reference Numerals x switchir~.g element 2 external part 3 bore 4 external surface inner element 6 lost motion spring 7 recess 8 recess 9 oouplW g means piston 11 compression spring mesas 12 stop 13 end surface 14 transverse surface annular surface 16 annular groove 17 underside 18 end side 19 rotation securement annular portion 21 pin component 22 edge region
[0006] The invention relates to a switching element for a valve drive of an internal combustion engine, preferably for shutting off valves, with an external part in whdse bore an inner element is axially movable, the external part and tha inner element having at least one respective mutually aligned recess due to an axially spaced relative position obtained by a lost motion spring, and in one of the recesses, facing in tkie direction of the other recess, displaceable coupling means are mutually applied in the relati~re position for coupling the inner element with the external part.
[0006] Such a switching element, constructed here as a cam follower iu a tappet push rod gear, is known from DE 199 1C 531. It is disadvantageous in this that only one piston is provided as the coupling means. It is clear to one skilled in the art that there is a high component loading in the coupling region because of the single piston coupling. There is also a relatively great danger of tilting of the inner element with respect to the external part. It is disadvantageous that a bore is provided as the recess into which the piston travels as coupling means. An extremely undesired edge loading can occur here when the coupling means travels out insufficiently, because of the special penetration of the bodies.
[00071 SttIdMARY
[0008] The object of the invention is therefore to provide a switching element of the kind mentioned at the beginning, in which the cited disadvantages are eliminated with simple means.
[0009) This object is attained according to the invention in that tWO pistons are provided as coupling means, which travel in the recess formed as a radial bore of the inner element, and which diametrically oppose one anotb.er there, the recess of the external part being formed there ae an anzwlar groove in the 'bore, and the piston at its underside remote firora the cam, starting from its radially eternal en.d face, aect~.or~ally has a planar transverse szu-face as contact region to a facing annular surface of the annular groove, and the piston being guided in a rotationally secure manner in the inner element.
[0010] A switching element with a very secure coupling mechanism is hereby provided. The component loading, and likeWi~se the tilting movement, are greatly reduced by the two-piston locking. On the other hand it is to be observed that a coupling aperture which is easy to make is presexit in the exte~cnal part because of the recess in the external part being formed as a peripheral annulax groove.
According to the invention, the pistons have on their underside a planar surface as contact region for the annular groove, eo that the surface pressure is greatly reduced here. In other words, txurough the measures according to the i~rmention, the cam stroke is transferred to the inner part over very large bearing surfaces.
If necesearp, more than two coupling means can be arranged in the inner element;
preferably these are then symmetrically distributed, [0011] So that the planar transverse surface is always in contact with the annular surface of the annular groove, the pistons are fated against rotation in their recess by means of a simple rotational securement. Here, in one specific embodiment of the invention, for example, a surrounding snap ring is present enclosing the inner element and on which the cross section of the piston abuts in the recess region. The pistons can of course be themselves secured agaix~ rotation in their recess by means of flats oar spring groove embodiments.
(0012) An a further development of the invention, it is proposed to provide a stop for the piston in the inner element. ~'hie is arranged centrally, so that both pistons always have the same travel path 1'adially outward, (0013] Preferably the radial bore in the inner element is made as a through bore_ An offset or stepped construction ig however also conceivable, so that the said opting ring' yr a similar means can be dispensed with.
-2~
[0014] It is particularly adbantageous if the radially outward end face of the piston, at Ieast in the edge rsgion toward the transverse surface, has a curvature correlating with the bore of the inner element. It ie thus Blear that s good bearing region is already provided with even the smallest travel of the piston into the annular groove of the external part.
[0015] A further particularly preferrred embodiment of the invention relates to the end side of the piston connecting the transverse surface with the underside having a curvature correlating to the bore of the inner element, or being beveled Iike a roof. It is thus clear that by means of these simple measures the pistons can travel out radislly very far in the annular groove in the case of coupling, and thus form an outstanding support pattern.
[0016] The scope of this invention t'elates expressly to atll kinds of switcking elements in valve drives such as cam ~ollowera in tappet push rod drives, support elements for finger levers, buelrst tappets, etc.
[0017] BRIEF DESCRIPTION OF THE DR~A.WIN~GS
10018] The iaventioa is appropriately deset~bed with reference to the drawings.
j4029] Figure 1 is a longitudinal section through a switchixig element constructed as a xoller tappet according to the invention, [0020] figure 2 is a partial longitudinal section, turned through 90°
accordi-ng to Fig. Z, [0021] Figure 3 is a partial longitudinal section similar to Figure 2, [0022] Figure 4 is a bottom view of a piston as coupling means, [0023] Figure 5 ie a cross-sectional view of the piston, and 10024] figures fi and 7 show alternatsve exnbodinaents to Figures 4 and 5.
(0026) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] Figures 1-3 disclose a switching element 1 for a valve drive of an internal combustion engine. This is constructed here as a roller fiappet for a tappet push rod drive. It includes an eztern.al pelt 2, in whose bore 9 the external surface 4 _ _r__ ... __.
of an agally movable inner element ~ runs. The external part 2 and the Tuner element b are urged apart by a lost motion spring 6, not fux'ther described.
(002?] In the axially separated position of the external part 2 from the inner element 5 as described in the drawing, the recesses 7, 8 are mutually aligned.
The recess 7 of the external part 2 is made as a peripheral atlaular groove 2, The recess 8 in the inner element 5, on the contrary, is made as a through bore exteudi_ng radially. A path like a bowstring chord, or skew, is likewise conceivable.
(0028] Two diametrically opposed coupling means 9 are arranged in the recess 8 of the inner element 6. These are formed as pistons 10 here, and are urged span by a. co~oapression spring means 11. A stop for the pistons 10 is provided centrally is the recess 8. This is provided as an annular part such as a s~o~ap ring.
Thus in a decouplf ng position of the pistons 10, their central position and thus equal travel path is guaranteed.
(0029] As shown in detail in Figures 4-7, the pistons IO sectionally have a planar transverse surface 14 starting from their radially outer end face 13, This acts as contact region to a facing annular surface 15 (see h'igs 1-3) of the recess 7 formed as an annular groove. As can be seen, the coupling aperture in the external part 2 is formed circumferentially; this has manufacturing advantages, for example.
(0030] The and face 13 of the piston 10 can be curved, as shown in Figure 4, as can the bore 3 of the external part 2. Thus a good bearing pattern is immediately set up when the piston IO travels into the annular groove 36. So-called edge suppox-ts are effectively avoided, [0031] As can be seen from la5igures 4 and 6, an end side 18 of the piston 10 connecting the transverse surface 14 with an underside lT remote from the cam is likewise provided with a curvature correlating with the bore 3 of the external part 2 or, as shown in Figure 6, is beveled like a mof.
(00821 Since the transverse surfaces 14 of the pistons 10 have to be always facing the annular surface 15 of the annular groove 16 in the external part 2, a simple rotational securement 19 is provided for the pistons 10 (see Figure 2).
This comprises an annular part such as a snap ring, which is arranged in an annular groove 20 on the external surface 4 of the inner eleuient 5. The rotational sec~urement 19 runs at such a height as to engage under the transverse surface 14 of the pistons lo.
[0033] figure 3 shows an alternative measure to the central stop 12 for the pistons 10. This is provided here as a component 21 such as a pin, projecting orthogonally into the recess 8, formed as a radial bore, of the inner element 5.
[0084) Thus a switchipgr element is present which has a very secure and simply built coupling mechanism which produces only a very small component loading.
[0035] List of Reference Numerals x switchir~.g element 2 external part 3 bore 4 external surface inner element 6 lost motion spring 7 recess 8 recess 9 oouplW g means piston 11 compression spring mesas 12 stop 13 end surface 14 transverse surface annular surface 16 annular groove 17 underside 18 end side 19 rotation securement annular portion 21 pin component 22 edge region
Claims (7)
1. Switching element (1) for a valve drive of an internal combustion engine for shutting off valves, comprising an external part (2) with a bore (3) in which an inner element (5) is axially movable, the external part (2) and the inner element (5) having at least a respective mutually aligned recess (7, 8) due to an axially spaced relative position obtained by a lost motion spring (6) acting between the inner element and the external part, and in one of the recesses, in a direction of the other recess, a displaceable coupling mechanism (9) is provided for coupling the inner element (5) with the external part (2), wherein two pistons (10) are provided as the coupling mechanism (9), which travel in the recess (8) formed as a radial bore of the inner element (5), and which diametrically oppose one another, the recess (7) of the external part (2) being formed as an annular groove (16) in the bore (3), and the pistons (10) have an underside (17) and starting from a radially outer end face (13) of the pistons, sectionally have a planar transverse surface (14) as a contact region to a facing annular surface (15) of the annular groove (16), and the pistons (10) are guided by a rotation securement (19) in the inner element (5).
2. Switching element according to claim 1, wherein the rotation securement (19) comprises an annular part which extends in an annular groove (20) on an external surface (4) of the inner element (5) and is arranged at a height such that the annular part engages under the planar transverse surface (14) of the piston (10).
3. Switching element according to claim 1 or 2, wherein the recess (8) in the inner element (5) has a stop (12) for radially inner end faces of the pistons (10), and the step (12) is positioned centrally.
4. Switching element according to claim 3, wherein the recess (8) is formed as a through bore, and the stop (12) is formed as one of an annular part located in the through bore, or a component (21) that projects orthogonally into the through bore.
5. Switching element according to claim 1, wherein the radially outer end face (18) of the piston (10), at least in an edge region (22) to the transverse surface (14), has a curvature corresponding to the bore (3) of the inner element (5).
6. Switching element according to claim 1 or 5, wherein an end side (18) of the piston (10), connecting the transverse surface (14) with the underside (17), has a curvature correlating to the bore (3) of the inner element (5), or is formed with a roof-like bevel in a bottom surface thereof.
7. Switching element according to claim 1, wherein the switching element (1) is produced as a cam follower in a tappet push rod drive.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35463002P | 2002-02-06 | 2002-02-06 | |
| US60/354,630 | 2002-02-06 | ||
| DE10204673A DE10204673A1 (en) | 2002-02-06 | 2002-02-06 | Automotive drive switching element comprises diametrically opposed piston pair in groove mountings on inner and outer parts to run nontwistably in grooves. |
| DE10204673.5 | 2002-02-06 | ||
| PCT/EP2002/014431 WO2003067037A1 (en) | 2002-02-06 | 2002-12-18 | Switching element for a valve gear of an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2479264A1 CA2479264A1 (en) | 2003-08-14 |
| CA2479264C true CA2479264C (en) | 2010-06-29 |
Family
ID=27735652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2479264A Expired - Fee Related CA2479264C (en) | 2002-02-06 | 2002-12-18 | Switching element for a valve drive of an internal combustion engine |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2002358742A1 (en) |
| CA (1) | CA2479264C (en) |
| WO (1) | WO2003067037A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007016739A1 (en) * | 2007-04-07 | 2008-10-09 | Schaeffler Kg | Switchable valve drive part |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321704B1 (en) * | 1999-02-23 | 2001-11-27 | Eaton Corporation | Hydraulically actuated latching valve deactivation |
| US20020014217A1 (en) * | 1999-02-23 | 2002-02-07 | Church Kynan L. | Hydraulically actuated latching pin valve deactivation |
| DE19915531A1 (en) | 1999-04-07 | 2000-10-12 | Schaeffler Waelzlager Ohg | Cam tracker for valve drive of internal combustion engine, with locking element such as piston fixed in inner element receiver |
| US6497207B2 (en) * | 2000-10-20 | 2002-12-24 | Delphi Technologies, Inc. | Deactivation roller hydraulic valve lifter |
-
2002
- 2002-12-18 CA CA2479264A patent/CA2479264C/en not_active Expired - Fee Related
- 2002-12-18 WO PCT/EP2002/014431 patent/WO2003067037A1/en not_active Application Discontinuation
- 2002-12-18 AU AU2002358742A patent/AU2002358742A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2002358742A1 (en) | 2003-09-02 |
| CA2479264A1 (en) | 2003-08-14 |
| WO2003067037A1 (en) | 2003-08-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20131218 |