EP0787893B1 - Ventiltrieb für Brennkraftmaschinen mit einer pneumatischen Schliessfeder für ein Gaswechselventil - Google Patents
Ventiltrieb für Brennkraftmaschinen mit einer pneumatischen Schliessfeder für ein Gaswechselventil Download PDFInfo
- Publication number
- EP0787893B1 EP0787893B1 EP96119256A EP96119256A EP0787893B1 EP 0787893 B1 EP0787893 B1 EP 0787893B1 EP 96119256 A EP96119256 A EP 96119256A EP 96119256 A EP96119256 A EP 96119256A EP 0787893 B1 EP0787893 B1 EP 0787893B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- closing
- cylinder
- spring
- piston
- engine
- 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 - Lifetime
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
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
- F01L1/462—Valve return spring arrangements
- F01L1/465—Pneumatic arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
- F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P2003/006—Liquid cooling the liquid being oil
Definitions
- the invention is based on the preamble of claim 1 of DE-A 42 14 839.
- valve train is designed as a piston / cylinder unit pneumatic closing spring via its cylinder into a recess in the cylinder head the internal combustion engine pressed in to achieve a good derivation of the heat generated when compressing the enclosed gas volume.
- the cylinder of the closing spring unit with a considerable wall thickness designed to form cooling channels for the passage of lubricating oil draining from the valve train.
- the invention is based, for a pneumatic closing spring the task of a generic valve train to show a cooling arrangement, at least a heat dissipation effected depending on the machine speed enables.
- the advantage of the invention is a constant and in particular by the forced cooling Closing spring flushed by the coolant of the machine depending on the speed, the one optionally set in connection with the heat of compression Spring characteristic curve by means of an appropriate coolant supply to the Closing spring is determined.
- An advantageous embodiment of the invention describes claim 2, according to which Piston / cylinder unit of the closing spring in a forced-circulation cooled cylinder head is arranged. This can be separate from the internal combustion engine or be chilled with it. Furthermore, claim 2 includes that of the arrangement the closing spring serving recess over the stroke range of the spring piston extends circumferential groove for a formed with the cylinder coolant-carrying chamber, which is advantageously simple to form.
- a further development of the invention described in claim 3 is directed to that the cylinder designed as an insert (according to EP application No. 95111924.7) Piston / cylinder unit of the closing spring over the outer circumference with in the above Arranged circumferential groove adjacent machine-side areas Sealing devices interacts.
- the piston / cylinder unit proposed according to EP application 95111924.7 the pneumatic closing spring is sealed against the environment
- To be designed as a functional unit during assembly Use its spring function is not due to deformation by essentially a press fit especially geared towards sealing against the coolant are at risk, according to claim 3 with the outer circumference of the insert cylinder cooperating sealing devices proposed on the machine side, whereby an essentially smaller press fit is advantageously possible.
- claim 4 describes a multi-valve internal combustion engine that Separately arranged cooling chambers outside of their cooling jacket in the cylinder head the closing springs connected by a common channel, the when using the coolant of the internal combustion engine to cool the Closing springs are connected to the cooling jacket.
- the cooling jacket of the cylinder head can be separated from the closing spring cooling chambers can be optimized, with the design of the channel, for example with constant or variable cross-section over its length the invention Speed-dependent cooling of the closing spring or closing springs can be achieved is.
- claim 5 describes for separately arranged cooling chambers for the closing springs, the use of a lubricant of the internal combustion engine as Coolant, the cooling chambers of the closing springs in the Lubrication system of the internal combustion engine are arranged.
- the invention is based on an embodiment shown in the drawing described.
- a valve train 1 of an internal combustion engine 2, not shown, comprises in one liquid-cooled cylinder head 3 a control shaft 4 for actuating a valve 5 of a gas exchange channel 6.
- the valve 5 is a pneumatic closing spring 7 assigned, which is designed as a piston / cylinder unit 8 in a machine side Recess 9 is arranged.
- the cylinder 10 of the unit 8 of the closing spring 7 is in the direction of the control shaft 4 for slidably receiving one with a control cam 11 of the control shaft 4 interacting bucket tappet 12 extends directly onto a shaft 13 of the gas exchange valve 5 acts.
- Next is in the cylinder 10 with the valve stem 13 drive-connected piston 14 arranged as a movable Completion of a compression chamber 15 of the pneumatic closing spring 7 is used.
- the compression chamber 15 is connected to a gas-carrying supply line 16 in connection.
- the closing spring unit formed from cylinder 10 and piston 14 is preferably 8 as one against the subject of EP application 95111924.7 Environmentally sealed single-chamber functional unit designed around this advantageously far from the place of use before installation in the internal combustion engine 2 or in the cylinder head 3 for tightness and function.
- the closing spring 7 can either face one according to FR-A 2 529 616 the supply line 16 by means of a check valve, not shown lockable compression chamber 15 or according to DE-A 29 49 413 in connection with GB-PS 392 294 one with the supply line 16 via a small throttle bore, not shown, constantly communicating compression chamber 15.
- the cylinder 10 of the Closing spring 7 via an outer peripheral portion 17 at least in the stroke range of the spring piston 14 with a coolant-carrying chamber 18 of a liquid-cooled Internal combustion engine 2, preferably by a not shown Pump forced cooling is connected.
- the piston / cylinder unit 8 of the closing spring 7 is preferably in one arranged circulation-cooled cylinder head 3, the arrangement of the Closing spring 7 serving recess 9 over the stroke range of the spring piston 14 extending circumferential groove 19 which with the cylinder 10 a forms coolant-carrying chamber 18.
- a multi-valve internal combustion engine 2 are outside of their cooling jacket 22 in the cylinder head 3 separately arranged cooling chambers 18 of the closing springs 7 connected by means of a common channel 23, which when using the Coolant of the internal combustion engine 2 for cooling the closing springs 7 with the machine-side cooling jacket 22 is connected.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Description
Claims (5)
- Ventiltrieb für Brennkraftmaschinen mit einer pneumatischen Schließfeder für ein Gaswechselventil,wobei die in einer maschinenseitigen Ausnehmung (9) als Kolben/Zylinder-Einheit (8) angeordnete Schließfeder (7) über ihren den Schließfeder-Kolben (14) aufnehmenden Zylinder (10) flüssigkeitsgekühlt ist,daß der Zylinder (10) der Schließfeder (7) über einen Außenumfangsabschnitt (17) mindestens im Hubbereich des Schließfeder-Kolbens (14) von einem im Kühlmantel (22) einer flüssigkeitsgekühlten Brennkraftmaschine (2 bzw. Zylinderkopf 3) zwangsumgewälzten Kühlmittel beaufschlagt angeordnet ist.
- Ventiltrieb nach Anspruch 1, dadurch gekennzeichnet,daß die Kolben-/Zylinder-Einheit (8) der Schließfeder (7) in einem zwangsumlaufgekühlten Zylinderkopf (3) angeordnet ist, wobeidie der Anordnung der Schließfeder (7) dienende Ausnehmung (9) eine über den Hubbereich des Schließfeder-Kolbens (14) sich erstreckende Umfangsnut (19) aufweist für eine mit dem Zylinder (10) gebildete, kühlmittelführende Kammer (18).
- Ventiltrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Zylinder (10) der als ein Einsatz gestalteten Kolben-/Zylinder-Einheit (8) der Schließfeder (7) über den Außenumfang mit in der Umfangsnut (19) bzw. der Kammer (18) benachbarten maschinenseitigen Bereichen (20) angeordneten Dichteinrichtungen (21, O-Ringe) zusammenwirkt.
- Ventiltrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet,daß im Zylinderkopf (3) außerhalb des Kühlmantels (22) gesondert angeordnete Kühl-Kammern (18) für mehrere Schließfedern (7) mittels eines gemeinsamen Kanals (23) verbunden sind, derbei Verwendung des Kühlmittels der Brennkraftmaschine (2) zur Kühlung der Schließfedern (7) mit dem Kühlmantel (22) der Brennkraftmaschine (2) in Verbindung steht.
- Ventiltrieb nach Anspruch 4, dadurch gekennzeichnet,daß ein Schmiermittel der Brennkraftmaschine (2) als Kühlmittel der Schließfeder(n) (7) dient, wobeigegebenenfalls die Kühl-Kammer(n) (18) der Schließfeder(n) (7) im Schmiersystem der Brennkraftmaschine (2) angeordnet ist bzw. sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19603536A DE19603536C2 (de) | 1996-02-01 | 1996-02-01 | Ventiltrieb für eine Brennkraftmaschine mit einer pneumatischen Schließfeder für ein Gaswechselventil |
DE19603536 | 1996-02-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0787893A1 EP0787893A1 (de) | 1997-08-06 |
EP0787893B1 true EP0787893B1 (de) | 2001-04-04 |
Family
ID=7784206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96119256A Expired - Lifetime EP0787893B1 (de) | 1996-02-01 | 1996-12-02 | Ventiltrieb für Brennkraftmaschinen mit einer pneumatischen Schliessfeder für ein Gaswechselventil |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0787893B1 (de) |
DE (2) | DE19603536C2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022111123A1 (de) | 2022-05-05 | 2023-11-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Gaswechselventilanordnung für Brennkraftmaschinen sowie Ventiltriebanordnung |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19632628A1 (de) | 1996-08-13 | 1998-02-19 | Bayerische Motoren Werke Ag | Pneumatische Feder, insbesondere Schließfeder für ein Gaswechselventil einer Brennkraftmaschine |
DE10016878A1 (de) * | 2000-04-05 | 2001-10-18 | Bayerische Motoren Werke Ag | Schliessfeder-Vorrichtung für den Ventiltrieb eines Gaswechselventils einer Brennkraftmaschine |
JP6303991B2 (ja) * | 2014-11-13 | 2018-04-04 | トヨタ自動車株式会社 | シリンダヘッド |
JP6390368B2 (ja) * | 2014-11-13 | 2018-09-19 | トヨタ自動車株式会社 | シリンダヘッド |
KR20180085935A (ko) * | 2017-01-20 | 2018-07-30 | 두산인프라코어 주식회사 | 엔진의 롤러 태핏용 어댑터 및 이를 포함하는 엔진의 롤러 태핏 조립체 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB392294A (en) | 1932-02-09 | 1933-05-18 | Albert Eustace Short | Improvements in or relating to valve mechanism for internal combustion engines |
CH614014A5 (de) * | 1977-01-28 | 1979-10-31 | Sulzer Ag | |
DE2949413A1 (de) * | 1979-12-08 | 1981-06-11 | Volkswagenwerk Ag, 3180 Wolfsburg | Vorrichtung zur veraenderung der rueckstellkraefte bei gaswechsel-steuerventilen von verbrennungsmotoren |
FR2529616B1 (fr) | 1982-06-30 | 1987-03-27 | Renault Sport | Systeme de rappel pneumatique de soupape pour moteur a combustion interne |
SE455111B (sv) * | 1986-10-20 | 1988-06-20 | Volvo Ab | Ventilfjederanordning med paverkningsorgan for fjeder |
DE4214839A1 (de) * | 1992-05-05 | 1993-11-11 | Audi Ag | Ventiltrieb für eine Brennkraftmaschine |
JP3484498B2 (ja) * | 1993-09-30 | 2004-01-06 | ヤマハ発動機株式会社 | 4サイクルエンジン |
-
1996
- 1996-02-01 DE DE19603536A patent/DE19603536C2/de not_active Expired - Fee Related
- 1996-12-02 DE DE59606719T patent/DE59606719D1/de not_active Expired - Lifetime
- 1996-12-02 EP EP96119256A patent/EP0787893B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022111123A1 (de) | 2022-05-05 | 2023-11-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Gaswechselventilanordnung für Brennkraftmaschinen sowie Ventiltriebanordnung |
Also Published As
Publication number | Publication date |
---|---|
DE59606719D1 (de) | 2001-05-10 |
EP0787893A1 (de) | 1997-08-06 |
DE19603536C2 (de) | 1999-01-14 |
DE19603536A1 (de) | 1997-08-07 |
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