WO1997026445A1 - Durch einen nocken einer brennkraftmaschine betätigter ventilstössel - Google Patents
Durch einen nocken einer brennkraftmaschine betätigter ventilstössel Download PDFInfo
- Publication number
- WO1997026445A1 WO1997026445A1 PCT/EP1996/003260 EP9603260W WO9726445A1 WO 1997026445 A1 WO1997026445 A1 WO 1997026445A1 EP 9603260 W EP9603260 W EP 9603260W WO 9726445 A1 WO9726445 A1 WO 9726445A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cup
- bead
- inner part
- jacket
- valve tappet
- Prior art date
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
- F01L1/12—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
- 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
-
- 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
- F01L1/25—Hydraulic tappets between cam and valve stem
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49247—Valve lifter making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49298—Poppet or I.C. engine valve or valve seat making
- Y10T29/49304—Valve tappet making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2101—Cams
- Y10T74/2107—Follower
Definitions
- Valve tappets actuated by a cam of an internal combustion engine
- the present invention relates to a valve tappet actuated by a cam of an internal combustion engine, with a cup made from an iron material, which has a hollow cylindrical shirt and a cup bottom closing the shirt on the front side, the shirt having an outer circumferential groove and is provided on the inside with at least one bead, and with an inner part arranged concentrically within the cup, the jacket of which rests on the constriction, a hydraulic valve play compensation element being axially movably guided in the inner part.
- valve tappets for example known from DE-A 4325610
- the soft, unhardened inner part is inserted into the soft, unhardened cup, the peripheral groove being subsequently rolled on.
- the jacket of the inner part and the bead formed by the rolled-up circumferential groove are pressed against one another in such a way that the inner part is firmly connected to the cup.
- This partially complete valve tappet is then subjected to a heat treatment process, the cup and the inner part being hardened. After the end of the heat treatment, the inner part has deformed somewhat, so that cutting, in particular grinding work on the inner part is necessary for the correct guidance of the hydraulic valve clearance compensation element.
- the inner part of the known valve tappet has a guide sleeve in which the hydraulic valve lash adjuster is guided to be longitudinally displaceable.
- the inside of the guide sleeve is no longer circular-cylindrical, so that the inside wall of the guide sleeve has to be processed in a grinding process.
- the invention achieves this object in that the cup is hardened in a heat treatment process and the inner part is unhardened.
- This simple solution has the advantage that, for example, the guide sleeve no longer has to be machined before the hydraulic valve play compensation element is inserted into the inner part.
- distortion due to thermal stress on the inner part can be excluded because only the cup is hardened.
- an oil channel is formed in the known valve tappet between the shirt and the jacket, through which the oil can be pumped to the hydraulic valve lash compensation element.
- an annular space is formed by the jacket and the shirt, the annular space serving to delimit the oil channel.
- the outer diameter of the jacket and the inside diameter of the circumferential bead can advantageously be designed for an interference fit with one another.
- a further bead can expediently be provided on the end of the shirt adjacent to the cup base, against which the jacket of the inner part rests. In this case, on the one hand, a firm connection between the inner part and the cup is guaranteed.
- the cylindrical jacket of the inner part is supported on the beads at its two axial end regions, so that the inner part cannot tilt.
- the annulus is created without any additional effort. det, which is used to form the Olkanals.
- An opening communicating with this annular space is expediently provided in the circumferential groove, so that oil present in the circumferential groove can be pumped into the annular space or into the oil channel.
- the inner part has a funnel widening towards the cup bottom, to the enlarged end of which the jacket is connected, and to the tapered end of which a guide sleeve is connected, in which the hydraulic valve compensation element is arranged, a transition section of the funnel is provided on the jacket for contacting the cup base, and the transition section is provided on its end face facing the cup base with a bead which communicates on the one hand with an oil reservoir delimited by the funnel and the cup base.
- the bead communicates with the annular space on the other hand.
- a filler piece of low density is inserted into the annular space, a slot provided on the filler piece communicating on the one hand with the bead and on the other hand with the opening of the shirt.
- the filler, the cup and the inner part therefore delimit an oil channel.
- At least one radial widening is provided on the jacket, which radially overlaps the bead.
- the radial expansion can, for example, be rolled all round.
- the widening can be provided, for example, between two axially adjacent beads of the shirt, the widening expediently being pressed onto the bead adjacent to the open end of the cup. This ensures a firm connection between the inner part and the cup.
- This fixed connection can, however, also be formed in that lugs are arranged on the jacket, which are distributed over the circumference and engage in a form-fitting manner in recesses in the bead.
- a particularly expedient manufacturing method of the valve tappet according to the invention provides that the circumferential groove is first rolled onto the cup, then the cup is subjected to a heat treatment process, and then the unhardened inner part is introduced into the cup. According to this manufacturing process, it is ensured that after the inner part has been inserted into the cup, for example, the guide sleeve no longer has to be reworked. After the inner part has been introduced into the cup, it is expedient to roll the jacket onto the bead of the shirt which has already been formed by the rolled-on circumferential groove. It is even more economical if the inner part is pressed into the cup, the outer diameter of the jacket and the inside diameter of the bead being designed for a press fit with one another.
- the press fit enables the annular space to be closed in a gas-tight and / or liquid-tight manner on the end face facing away from the cup base.
- a secure connection between the inner part and the cup can, however, also be ensured in that at least one radial widening which radially overlaps the bead is provided on the jacket after insertion of the inner part.
- FIG. 1 shows a longitudinal section through a valve tappet according to the invention
- FIG. 2 shows a longitudinal section through a further valve tappet according to the invention
- Figure 3 shows a longitudinal section through a further valve lifter according to the invention
- FIG. 4 shows a cross section through the valve lifter from FIG. 3.
- Figure 5 shows a longitudinal section through a further valve lifter according to the invention
- FIG. 1 shows a valve lifter actuated by a cam (not shown) of an internal combustion engine, with a cup 1 which has a hollow-cylindrical shirt 2 and a cup bottom 3 which closes the hollow-cylindrical shirt 2 on the front side, the shirt 2 having a rolled circumferential groove 4 on the outside and provided on the inside with a circumferential convex bead 5 opposite the circumferential groove 4.
- Inside the cup 1 there is an inner part 6 which is arranged concentrically therewith and has a thin-walled funnel 7 which widens towards the cup bottom 3.
- a guide sleeve 8 concentrically arranged to the cup 1 connects in one piece and at the extended end of the funnel 7, a hollow cylindrical jacket 9 concentrically arranged with the cup 1 connects in one piece.
- a hydraulic valve play compensation element 10 is guided in an axially movable manner in the guide sleeve 8.
- the jacket 9 is pressed onto the bead 5, the jacket 9 and the shirt 2 delimiting an annular space 11.
- the outer diameter of the jacket 9 and the inside diameter of the circumferential bead 5 are designed for an interference fit with one another.
- An opening 1 2 communicating with this annular space 1 1 is provided in the circumferential groove 4.
- a transition section 13 from the funnel 7 to the jacket 9 is provided for abutment against the cup base 3 3 facing end face, the transition section 1 3 is provided with a bead 14 which communicates on the one hand with an oil storage space 1 5 delimited by the funnel 7 and the cup base 3 and on the other hand with the annular space 1 1.
- the circumferential groove 4 is rolled into the initially soft cup 1.
- the cup 1 is then subjected to a heat treatment process and hardened in the process.
- the soft inner part 6 is inserted into the cup 1.
- the inner part 6 is pressed into the cup 1.
- the exemplary embodiment according to FIG. 2 differs from that from FIG. 1 essentially in that the fixed connection between the inner part 6 and the cup 1 is established in a further step: for this purpose, the bead 5 is axially on both sides of the jacket 9 lugs 16 distributed around the circumference are stamped, which radially overlap the bead 5 and are pressed against the bead 5.
- the fixed connection between the inner part 6 and the cup 1 is likewise produced by a further step: after the inner part 6 has been inserted into the cup 1, the end of the jacket becomes 9 rolled onto the bead 5.
- a nose 17 provided on the circumference of the jacket 9 engages in a recess 18 in the bead 5 in a form-fitting manner.
- a filler 19 of low density is inserted into the annular space 11, a slot 20 provided on the filler 19 communicating on the one hand with the bead 14 and on the other hand with the opening 12 of the shirt 8.
- FIG. 4 shows in cross section the annular design of the filler 19.
- the filler 19 is of course also suitable for use with the valve lifters described above.
- the annular space 1 1 is closed in a gas-tight and / or liquid-tight manner on its end face facing away from the cup base 3.
- the valve tappet according to the invention shown in FIG. 5 differs from that from FIG. 1 essentially in that the shirt 2 has a second circumferential bead 21 at its end adjacent to the cup base 3.
- the jacket 9 of the inner part 6 bears on the second bead 21 already described above and on this second bead 21. In this way it is ensured that the inner part 6 cannot tilt.
- this second bead 21 causes an increased anchoring of the inner part 6 with respect to the cup 1 so that the oil can get from the annular space 11 into the oil storage space, the bead 14 is drawn into the jacket 9 of the inner part 6 and opened towards the annular space 11 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681230T DE19681230D2 (de) | 1996-01-20 | 1996-07-24 | Durch einen Nocken einer Brennkraftmaschine betätigter Ventilstössel |
US09/101,404 US5979385A (en) | 1996-01-20 | 1996-07-24 | Valve tappet actuated by the cam of an internal combustion engine |
JP09525614A JP2000503362A (ja) | 1996-01-20 | 1996-07-24 | 内燃エンジンのカムが作動するバルブタペット |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19602012A DE19602012A1 (de) | 1996-01-20 | 1996-01-20 | Durch einen Nocken einer Brennkraftmaschine betätigter Ventilstößel |
DE19602012.3 | 1996-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997026445A1 true WO1997026445A1 (de) | 1997-07-24 |
Family
ID=7783264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003260 WO1997026445A1 (de) | 1996-01-20 | 1996-07-24 | Durch einen nocken einer brennkraftmaschine betätigter ventilstössel |
Country Status (5)
Country | Link |
---|---|
US (3) | US5979385A (de) |
JP (1) | JP2000503362A (de) |
KR (1) | KR20000004904A (de) |
DE (3) | DE19602012A1 (de) |
WO (1) | WO1997026445A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6536391B2 (en) * | 2000-12-13 | 2003-03-25 | Delphi Technologies, Inc. | Compact hydraulic lash adjuster |
EP1536106A1 (de) * | 2000-12-13 | 2005-06-01 | Delphi Technologies, Inc. | Hydraulisches Spielausgleichelement |
DE10106983A1 (de) * | 2001-02-15 | 2002-08-29 | Ina Schaeffler Kg | Stößel |
JP2003065021A (ja) * | 2001-08-29 | 2003-03-05 | Fuji Oozx Inc | 内燃機関用タペット |
DE10360467B4 (de) * | 2003-12-22 | 2011-11-10 | Trw Deutschland Gmbh | Mechanischer Ventilstößel |
TWI392251B (zh) * | 2009-11-10 | 2013-04-01 | Ind Tech Res Inst | 光纖網路與其光訊號調變方法 |
US10119607B2 (en) | 2016-04-15 | 2018-11-06 | Koyo Bearings North America Llc | Follower mechanism |
US11143059B2 (en) | 2019-10-03 | 2021-10-12 | Koyo Bearings North America Llc | Tappet assembly with unground outer cup |
US11149593B2 (en) | 2019-10-03 | 2021-10-19 | Koyo Bearings North America Llc | Tappet assembly with formed anti-rotation alignment device |
DE102020104313B3 (de) * | 2020-02-19 | 2021-01-28 | Schaeffler Technologies AG & Co. KG | Stößel zur Beaufschlagung eines Pumpenkolbens einer Kraftstoffhochdruckpumpe |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5280771A (en) * | 1992-09-23 | 1994-01-25 | Eaton Corporation | Direct acting hydraulic tappet |
DE4325610A1 (de) * | 1993-07-30 | 1995-02-02 | Schaeffler Waelzlager Kg | Tassenförmiger Ventilstößel |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3500425A1 (de) * | 1985-01-09 | 1986-07-10 | Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt | Hydraulischer tassenstoessel fuer verbrennungsmotoren |
DE3639911A1 (de) * | 1986-11-22 | 1988-06-01 | Schaeffler Waelzlager Kg | Sich selbsttaetig hydraulisch einstellender ventilstoessel |
US4756282A (en) * | 1987-08-31 | 1988-07-12 | General Motors Corporation | Direct acting hydraulic valve lifter with integral plunger |
DE3812333A1 (de) * | 1988-04-14 | 1989-10-26 | Schaeffler Waelzlager Kg | Sich selbsttaetig hydraulisch einstellender ventilstoessel |
DE8902780U1 (de) * | 1989-03-08 | 1989-04-20 | Ina Waelzlager Schaeffler Kg, 8522 Herzogenaurach, De | |
DE4005261A1 (de) * | 1990-02-20 | 1991-08-22 | Bayerische Motoren Werke Ag | Tassenstoessel mit einem hydraulischen ventilspiel-ausgleichselement |
DE9206480U1 (de) * | 1992-05-13 | 1992-06-25 | Ina Waelzlager Schaeffler Kg, 8522 Herzogenaurach, De | |
DE4428309A1 (de) * | 1993-08-24 | 1995-03-02 | Schaeffler Waelzlager Kg | Tassenförmiger Ventilstößel |
DE4343876A1 (de) * | 1993-12-22 | 1995-06-29 | Schaeffler Waelzlager Kg | Stößel für den Ventiltrieb einer Brennkraftmaschine |
US5586528A (en) * | 1993-12-22 | 1996-12-24 | Ina Walzlager Schaeffler Kg | Tappet for the valve drive of an internal combustion engine |
IT1279048B1 (it) * | 1995-10-27 | 1997-12-04 | Eaton Automotive Spa | Punteria idraulica ad effetto sifone priva di saldature,con doppio serbatoio esterno anulare |
DE19542697A1 (de) * | 1995-11-16 | 1997-05-22 | Schaeffler Waelzlager Kg | Stößel für einen Ventiltrieb einer Brennkraftmaschine |
DE19724563A1 (de) * | 1997-06-11 | 1998-12-17 | Schaeffler Waelzlager Ohg | Tassenförmiger Ventilstößel |
-
1996
- 1996-01-20 DE DE19602012A patent/DE19602012A1/de not_active Withdrawn
- 1996-02-28 DE DE19607442A patent/DE19607442A1/de not_active Withdrawn
- 1996-07-24 WO PCT/EP1996/003260 patent/WO1997026445A1/de not_active Application Discontinuation
- 1996-07-24 JP JP09525614A patent/JP2000503362A/ja active Pending
- 1996-07-24 KR KR1019980705506A patent/KR20000004904A/ko not_active IP Right Cessation
- 1996-07-24 DE DE19681230T patent/DE19681230D2/de not_active Expired - Fee Related
- 1996-07-24 US US09/101,404 patent/US5979385A/en not_active Expired - Fee Related
-
1999
- 1999-07-30 US US09/364,948 patent/US6089200A/en not_active Expired - Fee Related
- 1999-11-09 US US09/436,812 patent/US6065435A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5280771A (en) * | 1992-09-23 | 1994-01-25 | Eaton Corporation | Direct acting hydraulic tappet |
DE4325610A1 (de) * | 1993-07-30 | 1995-02-02 | Schaeffler Waelzlager Kg | Tassenförmiger Ventilstößel |
Also Published As
Publication number | Publication date |
---|---|
JP2000503362A (ja) | 2000-03-21 |
DE19602012A1 (de) | 1997-07-24 |
DE19681230D2 (de) | 1998-12-03 |
US6065435A (en) | 2000-05-23 |
KR20000004904A (ko) | 2000-01-25 |
US6089200A (en) | 2000-07-18 |
DE19607442A1 (de) | 1997-10-02 |
US5979385A (en) | 1999-11-09 |
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