EP1143115A2 - Dispositif de ressort pour l'opération d'une soupape d'un moteur à combustion interne - Google Patents

Dispositif de ressort pour l'opération d'une soupape d'un moteur à combustion interne Download PDF

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Publication number
EP1143115A2
EP1143115A2 EP01108364A EP01108364A EP1143115A2 EP 1143115 A2 EP1143115 A2 EP 1143115A2 EP 01108364 A EP01108364 A EP 01108364A EP 01108364 A EP01108364 A EP 01108364A EP 1143115 A2 EP1143115 A2 EP 1143115A2
Authority
EP
European Patent Office
Prior art keywords
gas
spring
piston
chamber
gas spring
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
Application number
EP01108364A
Other languages
German (de)
English (en)
Other versions
EP1143115B1 (fr
EP1143115A3 (fr
Inventor
Wolfgang Semet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1143115A2 publication Critical patent/EP1143115A2/fr
Publication of EP1143115A3 publication Critical patent/EP1143115A3/fr
Application granted granted Critical
Publication of EP1143115B1 publication Critical patent/EP1143115B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L3/10—Connecting springs to valve members

Definitions

  • the invention relates to a preamble of claim 1
  • Closing spring device for the valve train of a gas exchange valve of an internal combustion engine in which a mechanical spring and from a predetermined engine speed range a controlled switchable gas spring in parallel cause the closing movement of the gas exchange valve, the gas spring one comprises a piston which closes in a stroke-movable manner.
  • Such a closing spring device is for example from DE 38 08 542 C2 is known, with the speed-related change in the spring characteristic of the gas spring this is supplied with a medium from a pressure accumulator.
  • EP 0 824 180 A1 describes a pneumatic closing spring for a gas exchange valve known an internal combustion engine, wherein a stroke-controlled piston the closing spring is equipped with devices that are self-pumping Result in closing spring.
  • This well-known, cooperating with a tappet Closing spring is particularly complex due to the separate piston of the closing spring.
  • the invention has for its object a generic closing spring device To show in a self-pumping design with a simple structure.
  • the gas spring piston is designed as a plunger with one in one of the gas spring chamber separate room slidably guided piston shirt as a pump piston a self-pumping gas spring, which can be supplied from the controlled with a medium Pump room via a controlled switchable overflow channel compressed medium with essentially maximum opening stroke of the gas exchange valve is fed.
  • the gas spring piston is a cylindrical tappet in a wall of the internal combustion engine fixed, pot-shaped insert with one in the bottom of the shaft of the gas exchange valve tightly penetrated opening a mechanical spring Gas spring chamber and an annular pump chamber can be lifted closes, one or more overflow channels connected to the pump chamber formed as grooves covered by the wall on the outer periphery of the insert are in an annular groove in the with the outer surface of the piston skirt correspond to the sliding surface of the insert.
  • the tappet has in the outer Mantle surface of the piston skirt at a maximum opening stroke of the gas exchange valve the distributor groove assigned on the insert side, which is included in the Gas spring chamber directed overflow openings in the piston skirt in connection stands.
  • the pressure in the Gas spring chamber successively increased until pressure equalization in the gas spring chamber with the maximum discharge pressure in the pump room.
  • the pump device according to the invention remains switched on until Lowering the speed of the internal combustion engine into an engine speed range, in which the restoring force of the mechanical spring to reset the respective gas exchange valve is sufficient.
  • a closing spring device 1 for the valve train of a gas exchange valve 2 one Internal combustion engine, not shown, comprises a mechanical spring 3, which a predetermined engine speed range by means of a controllable switchable Gas spring 4 in parallel connection the closing movement of the gas exchange valve 2 causes, the gas spring 4 closing a chamber 5 in a stroke-movable manner Piston 6 includes.
  • the gas spring piston 6 is designed as a plunger 7 with one in one of the gas spring chamber 5 separate room 8 slidably guided piston skirt 9 as a pump piston a self-pumping gas spring 4, which is controlled from the medium Pump room 8 that can be supplied via a controllably switchable overflow channel 10 the compressed medium with a substantially maximum opening stroke of the gas exchange valve 2 is supplied.
  • the gas spring piston 6 is a cylindrical cup tappet 7, which in a in a wall 11 of the not shown Internal combustion engine fixedly arranged cup-shaped insert 12 with a Bottom 13 of the shaft 14 of the gas exchange valve 2 tightly penetrated opening 15 a gas spring chamber 5 receiving the mechanical spring 3 and also closes an annular pump chamber 8 so that it can be moved, one or more overflow channels 10 connected to the pump chamber 8 than by the Wall 11 covered grooves are formed on the outer circumference of the insert 12. These overflow channels 10 open into an annular groove 16 in the with the outer Shell surface of the piston skirt 9 corresponding sliding surface 17 of the insert 12th
  • the bucket tappet has for pushing the compressed air into the gas spring chamber 5 7 in the outer surface of the piston skirt 9 one at maximum Opening stroke of the gas exchange valve 2 assigned to the insert-side annular groove 16 Distributor groove 18, the overflow openings directed into the gas spring chamber 5 19 in the piston shirt 9 is connected.
  • the overflow channels 10 are provided with a distributor line 20 to gas spring chambers 5 of gas springs 4 further gas exchange valves 2 in connection, the distribution line 20 via a stub 21 and a electronically controlled 2/2-way valve 22 for pressure regulation in the gas springs 4 communicates with a gas atmosphere.
  • FIG. 1 further shows that the pump chamber 8 has a separate distributor line 23 connected to pump chambers 8 of gas springs 4 further gas exchange valves 2 is, the manifold 23 on the one hand with the respective pump chamber 8 an inflow line 24 that can be controlled by the respective piston skirt / pump piston 9 communicates and on the other hand electronically by means of another controlled 2/2-way valve 25 controllable inflow channel 26 with a gas atmosphere connected is.
  • the gas atmosphere is preferably the normal atmosphere of the free environment.
  • the inflow channel 26 is to the pump chamber 8 closed by the 2/2-way valve 25, whereas the gas or air spring 4 including the pump chamber 8 via the spur line 21 and the overflow channels 10 are ventilated when the 2/2-way valve 22 is openly controlled. Not with this one The position of the two directional control valves 22 and 25 shown is the gas or air spring 4 practically ineffective.
  • the gas or air spring 4 has one Characteristic curve according to curve "A".
  • the curve "B" in Figure 2 achieved.
  • this also advantageously enables any intermediate curve and thus a corresponding pressure in the gas or to produce air spring 4, namely in that the air supply to Pump chamber 8 serving 2/2-way valve 25 and that for venting the gas spring chamber 5 serving 2/2-way valve 22 together depending on the machine speed cyclically driven between their closing and opening positions are, whereby the respective desired pressure value in the gas spring chamber 5th by alternately closing and opening the inflow channel 26 and Stub 21 is achieved.
  • the Pot-shaped insert 12 formed in two parts from a and positively connected tubular sleeve 27 and a fixedly arranged therein Stopper 28, which means by means of an opposite sleeve diameter in the outer diameter reduced collar 29 of the design of the pump chamber 8 serves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Driven Valves (AREA)
EP01108364A 2000-04-05 2001-04-03 Dispositif de ressort pour l'opération d'une soupape d'un moteur à combustion interne Expired - Lifetime EP1143115B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10016878 2000-04-05
DE10016878A DE10016878A1 (de) 2000-04-05 2000-04-05 Schliessfeder-Vorrichtung für den Ventiltrieb eines Gaswechselventils einer Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1143115A2 true EP1143115A2 (fr) 2001-10-10
EP1143115A3 EP1143115A3 (fr) 2003-01-02
EP1143115B1 EP1143115B1 (fr) 2004-01-28

Family

ID=7637639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01108364A Expired - Lifetime EP1143115B1 (fr) 2000-04-05 2001-04-03 Dispositif de ressort pour l'opération d'une soupape d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP1143115B1 (fr)
DE (2) DE10016878A1 (fr)
ES (1) ES2213650T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009087441A1 (fr) * 2007-12-21 2009-07-16 Ferrari S.P.A. Système pneumatique de commande des soupapes d'un moteur à combustion interne

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207038A1 (de) * 2002-02-20 2003-08-21 Bayerische Motoren Werke Ag Ventiltrieb für eine Brennkraftmaschine
DE10243388B4 (de) * 2002-09-13 2012-02-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Pneumatische Ventilfeder für Gaswechselventile von Brennkraftmaschinen
EP2208870B1 (fr) 2009-01-20 2013-03-27 BRP-Powertrain GmbH & Co. KG Système de ressort pneumatique pour moteur à combustion interne
EP2211031B1 (fr) 2009-01-22 2013-07-10 BRP-Powertrain GmbH & Co. KG Ressort pneumatique avec couvercle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949413A1 (de) * 1979-12-08 1981-06-11 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur veraenderung der rueckstellkraefte bei gaswechsel-steuerventilen von verbrennungsmotoren
EP0269587A1 (fr) * 1986-10-20 1988-06-01 Ab Volvo Système de ressort de soupage de moteurs à combustion interne
DE3808542A1 (de) * 1987-03-26 1988-10-06 Volkswagen Ag Ventiltrieb fuer ein gaswechselventil einer brennkraftmaschine
EP0396327A1 (fr) * 1989-04-26 1990-11-07 Honda Giken Kogyo Kabushiki Kaisha Dispositif de commande de soupape pour moteur à combustion interne
DE4214839A1 (de) * 1992-05-05 1993-11-11 Audi Ag Ventiltrieb für eine Brennkraftmaschine
EP0787893A1 (fr) * 1996-02-01 1997-08-06 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Commande de soupape à ressort de rappel pneumatique pour moteur à combustion interne
EP0824180A1 (fr) * 1996-08-13 1998-02-18 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Ressort pneumatique pour soupape de moteur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE59506935D1 (de) * 1994-08-12 1999-11-04 Bayerische Motoren Werke Ag Pneumatische Feder, insbesondere für Gaswechselventile von Brennkraftmaschinen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2949413A1 (de) * 1979-12-08 1981-06-11 Volkswagenwerk Ag, 3180 Wolfsburg Vorrichtung zur veraenderung der rueckstellkraefte bei gaswechsel-steuerventilen von verbrennungsmotoren
EP0269587A1 (fr) * 1986-10-20 1988-06-01 Ab Volvo Système de ressort de soupage de moteurs à combustion interne
DE3808542A1 (de) * 1987-03-26 1988-10-06 Volkswagen Ag Ventiltrieb fuer ein gaswechselventil einer brennkraftmaschine
EP0396327A1 (fr) * 1989-04-26 1990-11-07 Honda Giken Kogyo Kabushiki Kaisha Dispositif de commande de soupape pour moteur à combustion interne
DE4214839A1 (de) * 1992-05-05 1993-11-11 Audi Ag Ventiltrieb für eine Brennkraftmaschine
EP0787893A1 (fr) * 1996-02-01 1997-08-06 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Commande de soupape à ressort de rappel pneumatique pour moteur à combustion interne
EP0824180A1 (fr) * 1996-08-13 1998-02-18 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Ressort pneumatique pour soupape de moteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009087441A1 (fr) * 2007-12-21 2009-07-16 Ferrari S.P.A. Système pneumatique de commande des soupapes d'un moteur à combustion interne
US8424499B2 (en) 2007-12-21 2013-04-23 Ferrari S.P.A. Pneumatic system for controlling the valves of an internal combustion engine

Also Published As

Publication number Publication date
EP1143115B1 (fr) 2004-01-28
DE50101377D1 (de) 2004-03-04
EP1143115A3 (fr) 2003-01-02
ES2213650T3 (es) 2004-09-01
DE10016878A1 (de) 2001-10-18

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