EP0841474A1 - Vorrichtung zur Abgasrückführung - Google Patents
Vorrichtung zur Abgasrückführung Download PDFInfo
- Publication number
- EP0841474A1 EP0841474A1 EP97117484A EP97117484A EP0841474A1 EP 0841474 A1 EP0841474 A1 EP 0841474A1 EP 97117484 A EP97117484 A EP 97117484A EP 97117484 A EP97117484 A EP 97117484A EP 0841474 A1 EP0841474 A1 EP 0841474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tappet
- cup
- webs
- recesses
- pressure piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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
- F01L1/20—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
-
- 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
- F01L13/0005—Deactivating valves
Definitions
- the invention is based on a switchable tappet in the preamble of claim 1 type described
- Japanese Patent Laid-Open No. 61-118514 is one with a single one Switchable bucket tappets interacting cams of a control shaft are known, which cooperates with the stem of a gas exchange valve Pressure piece includes that over the inside of the tappet guide shirt is slidably guided against an arranged restoring element and with the shirt over recesses arranged in pairs relocatable locking bolts by means of spring action in the locked and by controlled hydraulic actuation is in unlocked connection.
- the pressure piece of this well-known tappet is a cylindrical solid body designed and therefore of relatively large mass, which disadvantageously activated valve train of the gas exchange valve considerable forces are generated.
- the invention has for its object a generic, switchable Cup tappets to improve so that with a lightweight to reduce weight Thrust piece the mass forces in the valve train are significantly reduced.
- the advantage of the invention can be seen in a lightweight pressure piece, wherein
- the fixed, central connection is another structural and functional advantage of webs and struts over a housing to accommodate a valve lash adjuster.
- the embodiment specified in claim 2 also enables the tappet reduced weight due to relatively thin-walled sections of the shirt form, the recesses provided for the locking bolts in Guide shirt can be dimensioned advantageously in the recesses.
- the pressure piece on the tappet arranged captively via spring-loaded locking bolts, the im Guide shirt of the tappet between the end faces of the locking bolts and the associated caps of the recesses formed chambers a channel arranged on the outer circumference of the tappet guide shirt are supplied.
- the tappet according to claim 4 is one of the struts for receiving a Supply channel to an oil storage chamber in which a hydraulic valve lash compensation element receiving housing, the supply channel with one arranged in the thick-walled area of the tappet guide shirt Niche is connected and therefore an adequate oil supply for the valve clearance compensation element is ensured.
- claim 5 serve Web and the struts in an advantageous constructive arrangement of a common Rest of a return spring arranged in the tappet, the rest on the pressure piece side in a simple manner over a projecting section of the Housing is kept centered.
- claim 6 includes the proposal a non-rotating cup tappet with a rotatable mounted slide plate for the action of an off-center control cam equip.
- a switchable tappet 1 for a gas exchange valve shown only in sections 2 of an internal combustion engine, not shown, includes one with the Shaft 3 of the gas exchange valve 2 cooperating pressure piece 4, which over the Inside 5 of the tappet guide shirt 6 against a return spring 7 is slidably guided.
- the pressure piece 4 with the guide shirt 6 via recesses 8, 8 'and 9, 9' which are arranged in alignment in pairs Locking bolt 10 locked in by spring action and controlled by hydraulic action in unlocked connection.
- Cup tappet 1 designed such that the cup tappet 1 inside in areas of the webs 12 and the struts 15 of the pressure piece 4 radial Projections 16, 17 with the cylinder jacket 11 of the pressure piece 4 leading sliding surfaces 18 and 19, the projections 16 facing the webs 12 the recesses 8 ', 9' provided on the tappet side in the guide shirt 6 for have the locking bolts 10.
- This enables both the tappet side To dimension recesses 8 ', 9' in the guide shirt 6 sufficiently large, with which in an advantageous manner in connection with the correspondingly adapted Locking bolt 10 a high level of operational security of this locking device Pressure piece 4 and tappet 1 is achieved.
- the drawing also shows that the over the end faces 23 of the locking pin 10 in these recesses 8 ', 9' formed chambers 24 via a branch line 25 with an arranged in the outer circumference of the tappet guide shirt 6 Channel 26 are connected, with a in the stroke direction of the tappet 1 in Guide shirt 6 trained pocket 27 is in oil-bearing connection.
- this channel 26 arranged in the outer circumference of the guide shirt 6 is that the supplied oil is vented or defoamed through the channel area can and thus in the chambers 24 an air and bubble-free oil for a reliable Unlocking of pressure piece 4 and tappet 1 is available.
- the tappet 1 is secured against rotation stroke movable pressure piece 4 in one of the struts 15 a supply channel 28 to one in the housing 13 above the hydraulic valve lash compensation element - HVA - 14 provided oil storage chamber 29, the Supply channel 28 with an outer circumference of the tappet guide shirt 6 in the area of the strut 15 provided with the supply channel 28 associated projection 17 arranged open niche 30 in connection stands, Figure 3.
- the webs 12 and struts 15 serve to avoid additional components together the support of the return spring 7 arranged in the tappet 1, wherein the biased against a cup bottom portion 31 is arranged Return spring 7 at least in one end region by means of a Crosspieces 12 and the struts 15 projecting housing section 13 'held centered is.
- This training also makes it possible advantageously that the one Anti-rotation lock 32 provided tappet 1 with one on the annular cup bottom section 31 centered rotatably mounted slide plate 33 is on which a control cam, not shown, acts somewhat off-center Wear reduction.
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)
- Preventing Unauthorised Actuation Of Valves (AREA)
Abstract
Description
- Figur 1
- den erfindungsgemäßen Tassenstößel im Längsschnitt gemäß der Linie I-I in Figur 2,
- Figur 2
- den Tassenstößel im Querschnitt gemäß der Linie II-II in Figur 1 und
- Figur 3
- den erfindungsgemäßen Tassenstößel in einem weiteren Längsschnitt gemäß der Linie III-III in Figur 2.
Claims (7)
- Schaltbarer Tassenstößel für Gaswechselventile von Brennkraftmaschinen, insbesondere mit Zylinderabschaltung,der ein mit dem Schaft (3) eines Gaswechselventils (2) zusammenwirkendes Druckstück (4) umfaßt, dasüber die Innenseite (5) des Tassenstößel-Führungshemdes (6) gegen ein angeordnetes Rückstellelement (Rückstellfeder 7) gleitbeweglich geführt ist, und dasmit dem Führungshemd (6) über in paarweise fluchtend angeordneten Ausnehmungen (8, 8', 9, 9') verlagerbare Sperrbolzen (10) mittels Federbeaufschlagung in verriegelter und mittels gesteuert hydraulischer Beaufschlagung in entriegelter Verbindung steht,
dadurch gekennzeichnet,daß das Druckstück (4) in dem Tassenstößel-Führungshemd (6) über einen relativ dünnwandigen Zylindermantel (11) geführt angeordnet ist, undder Zylindermantel (11) über die druckstückseitigen Ausnehmungen (8, 9) für die Sperrbolzen (10) aufnehmende Stege (12) mit einem ventilseitig offen gestalteten Gehäuse (13) zur Aufnahme eines Ventilspiel-Ausgleichselementes (14) in fester Verbindung steht, wobeidas Gehäuse (13) über zu den Stegen (12) im wesentlichen quer gerichtet angeordnete Streben (15) zusätzlich mit dem Zylindermantel (11) fest verbunden ist. - Tassenstößel nach Anspruch 1, dadurch gekennzeichnet,daß der Tassenstößel (1) innenseitig in Bereichen der Stege (12) und Streben (15) des Druckstückes (4) radiale Vorsprünge (16, 17) mit dem Zylindermantel (11) des Druckstückes (4) führenden Gleitflächen (18, 19) aufweist, wobeidie den Stegen (12) zugewandten Vorsprüngen (16) die tassenstößelseitig im Führungshemd (6) vorgesehenen Ausnehmungen (8', 9') für die Sperrbolzen (10) aufweisen.
- Tassenstößel nach Anspruch 1 und 2, dadurch gekennzeichnet,daß die über Druckfedern (20) in den druckseitigen Ausnehmungen (8, 9) abgestützt angeordneten Sperrbolzen (10) in Verriegelungsposition mit den tassenseitigen Ausnehmungen (8', 9') gegen kleinvolumige Anschläge (21) an die tassenstößelseitigen Ausnehmungen (8', 9') verschließenden Deckeln (22) anliegen, unddie über den Stirnflächen (23) der Sperrbolzen (10) in diesen Ausnehmungen (8', 9') gebildeten Kammern (24) über je eine Stichleitung (25) mit einem im Außenumfang des Tassenstößel-Führungshemdes (6) angeordneten Kanal (26) verbunden sind, dermit einer in Hubrichtung des Tassenstößels (1) im Führungshemd (6) ausgebildeten Tasche (27) in ölführender Verbindung steht.
- Tassenstößel nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet,daß das im Tassenstößel (1) drehgesichert hubbewegliche Druckstück (4) in einer der Streben (15) einen Versorgungskanal (28) zu einer im Gehäuse (13) über einem hydraulischen Ventilspiel-Ausgleichselement (HVA 14) vorgesehenen Öl-Vorratskammer (29) aufweist, wobeider Versorgungskanal (28) mit einer im Außenumfang des Tassenstößel-Führungshemdes (6) im Bereich des der mit dem Versorgungskanal (28) versehenen Strebe (15) zugeordneten Vorsprunges (17) angeordneten offenen Nische (30) in Verbindung steht.
- Tassenstößel nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet,daß die Stege (12) und Streben (15) gemeinsam der Auflage einer im Tassenstößel (1) angeordneten Rückstellfeder (7) dienen, wobeidie gegen einen Tassenboden-Abschnitt (31) abgestützte Rückstellfeder (7) mittels eines über die Stege (12) und Streben (15) vorstehenden Gehäuse-Abschnittes (13') zentriert gehalten ist.
- Tassenstößel nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß der mit einer Drehsicherung (32) versehene Tassenstößel (1) mit einer auf dem ringförmigen Tassenboden-Abschnitt (31) zentriert drehbeweglich gelagerten Gleitplatte (33) ausgerüstet ist.
- Tassenstößel nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß die Körper von Tassenstößel (1) und Druckstück (4) jeweils als ein Feingußteil gebildet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19645964 | 1996-11-07 | ||
DE19645964A DE19645964A1 (de) | 1996-11-07 | 1996-11-07 | Schaltbarer Tassenstößel für Gaswechselventile von Brennkraftmaschinen, insbesondere mit Zylinderabschaltung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0841474A1 true EP0841474A1 (de) | 1998-05-13 |
EP0841474B1 EP0841474B1 (de) | 2001-09-19 |
Family
ID=7810956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97117484A Expired - Lifetime EP0841474B1 (de) | 1996-11-07 | 1997-10-09 | Schaltbarer Tassenstössel |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0841474B1 (de) |
DE (2) | DE19645964A1 (de) |
ES (1) | ES2163077T3 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006108483A1 (de) * | 2005-04-15 | 2006-10-19 | Schaeffler Kg | Aussenteil eines schaltbaren tassenstössels |
DE102008035928A1 (de) | 2008-08-01 | 2010-02-04 | Assa Abloy Sicherheitstechnik Gmbh | Türöffner mit fernansteuerbarem Ventil |
DE102011007975A1 (de) | 2011-01-04 | 2012-07-05 | Assa Abloy Sicherheitstechnik Gmbh | Türbeschlagseinrichtung |
CN102852578A (zh) * | 2012-09-28 | 2013-01-02 | 长城汽车股份有限公司 | 一种汽油发动机挺柱 |
CN114102284A (zh) * | 2021-11-02 | 2022-03-01 | 东风柳州汽车有限公司 | 一种用于高压油泵挺柱的工装 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844202A1 (de) * | 1998-09-26 | 2000-03-30 | Schaeffler Waelzlager Ohg | Schaltbarer Nockenfolger |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61118514A (ja) | 1984-11-14 | 1986-06-05 | Mazda Motor Corp | エンジンのバルブ駆動装置 |
US5431133A (en) * | 1994-05-31 | 1995-07-11 | General Motors Corporation | Low mass two-step valve lifter |
WO1995030081A1 (en) * | 1994-05-03 | 1995-11-09 | Lotus Cars Limited | Valve control mechanism |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2829423A1 (de) * | 1978-07-05 | 1980-01-17 | Irm Antriebstech Gmbh | Tassenstoessel mit hydraulischem ventilspielausgleich |
US5361733A (en) * | 1993-01-28 | 1994-11-08 | General Motors Corporation | Compact valve lifters |
US5488934A (en) * | 1993-09-22 | 1996-02-06 | Aisin Seiki Kabushiki Kaisha | Valve gear device |
-
1996
- 1996-11-07 DE DE19645964A patent/DE19645964A1/de not_active Withdrawn
-
1997
- 1997-10-09 EP EP97117484A patent/EP0841474B1/de not_active Expired - Lifetime
- 1997-10-09 DE DE59704650T patent/DE59704650D1/de not_active Expired - Lifetime
- 1997-10-09 ES ES97117484T patent/ES2163077T3/es not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61118514A (ja) | 1984-11-14 | 1986-06-05 | Mazda Motor Corp | エンジンのバルブ駆動装置 |
WO1995030081A1 (en) * | 1994-05-03 | 1995-11-09 | Lotus Cars Limited | Valve control mechanism |
US5431133A (en) * | 1994-05-31 | 1995-07-11 | General Motors Corporation | Low mass two-step valve lifter |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 10, no. 304 (M - 526) 16 October 1986 (1986-10-16) * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006108483A1 (de) * | 2005-04-15 | 2006-10-19 | Schaeffler Kg | Aussenteil eines schaltbaren tassenstössels |
DE102008035928A1 (de) | 2008-08-01 | 2010-02-04 | Assa Abloy Sicherheitstechnik Gmbh | Türöffner mit fernansteuerbarem Ventil |
US8720959B2 (en) | 2008-08-01 | 2014-05-13 | Assa Abloy Sicherheitstechnik Gmbh | Door opening mechanism with automatic adjustment of the door opening latch |
DE102011007975A1 (de) | 2011-01-04 | 2012-07-05 | Assa Abloy Sicherheitstechnik Gmbh | Türbeschlagseinrichtung |
CN102852578A (zh) * | 2012-09-28 | 2013-01-02 | 长城汽车股份有限公司 | 一种汽油发动机挺柱 |
CN102852578B (zh) * | 2012-09-28 | 2016-01-20 | 长城汽车股份有限公司 | 一种汽油发动机挺柱 |
CN114102284A (zh) * | 2021-11-02 | 2022-03-01 | 东风柳州汽车有限公司 | 一种用于高压油泵挺柱的工装 |
CN114102284B (zh) * | 2021-11-02 | 2023-01-24 | 东风柳州汽车有限公司 | 一种用于高压油泵挺柱的工装 |
Also Published As
Publication number | Publication date |
---|---|
EP0841474B1 (de) | 2001-09-19 |
DE59704650D1 (de) | 2001-10-25 |
ES2163077T3 (es) | 2002-01-16 |
DE19645964A1 (de) | 1998-05-14 |
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