EP0468202A1 - Poussoir à galet avec compensateur de jeu hydraulique - Google Patents

Poussoir à galet avec compensateur de jeu hydraulique Download PDF

Info

Publication number
EP0468202A1
EP0468202A1 EP91110211A EP91110211A EP0468202A1 EP 0468202 A1 EP0468202 A1 EP 0468202A1 EP 91110211 A EP91110211 A EP 91110211A EP 91110211 A EP91110211 A EP 91110211A EP 0468202 A1 EP0468202 A1 EP 0468202A1
Authority
EP
European Patent Office
Prior art keywords
tappet
roller
gas exchange
roller tappet
hydraulic
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
EP91110211A
Other languages
German (de)
English (en)
Other versions
EP0468202B1 (fr
Inventor
Josef Thoma
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 EP0468202A1 publication Critical patent/EP0468202A1/fr
Application granted granted Critical
Publication of EP0468202B1 publication Critical patent/EP0468202B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
    • 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
    • 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
    • F01L2307/00—Preventing the rotation of tappets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18—DOHC [Double overhead camshaft]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/247—Arrangement of valve stems in cylinder heads the valve stems being orientated in parallel with the cylinder axis

Definitions

  • the invention relates to a roller tappet with a hydraulic compensation element, in particular for actuating internal combustion engine gas exchange valves, a roller rolling on a cam, in particular a camshaft.
  • Valve actuating tappets with hydraulic compensating elements are widely used in modern internal combustion engines.
  • roller tappets with hydraulic valve lash compensation elements have also become known. Examples of this are shown in European patent application 318 151 or DE 38 14 700 A1. The roller provided on the tappet and cooperating with the cam reduces the friction work to be performed as part of the valve actuation.
  • the known roller tappets with hydraulic compensating elements have a large volume and in particular have a relatively large overall height. Therefore, the object of the invention is to demonstrate measures by means of which the installation space, but in particular the installation height of a roller tappet, can be reduced with a hydraulic compensating element.
  • roller and the compensating element on the plunger are arranged essentially next to each other.
  • a standard hydraulic balancing element which is also installed in the known tappets, can advantageously be used here. This generally has two pistons which can be pushed into one another and which delimit a hydraulic high-pressure chamber, which can be filled from a hydraulic storage chamber via a check valve device.
  • Such a or similarly designed compensating element can be guided in a roller tappet according to the invention in a known manner.
  • the tappet carries the role that cooperates with the cam. This arrangement significantly reduces the height of the roller tappet.
  • the ram is guided within a housing as usual by a correspondingly designed ram outer wall.
  • two rollers can be provided for the moment of force-free force application, which are diametrically opposed near the tappet outer wall.
  • Such an arrangement is particularly advantageous if a single tappet is provided for actuating two gas exchange valves located next to one another. Then it is advisable to assign a separate hydraulic compensation element to each valve.
  • a gas exchange valve 1 of an internal combustion engine is actuated as usual by a cam 2, which is machined out of a camshaft 3.
  • a roller tappet designated in its entirety with 4 is provided for this purpose. This roller tappet is guided with its housing 5 in a guide bore 6 in the cylinder head 7, not shown, of an internal combustion engine so as to be longitudinally displaceable in the valve actuation direction.
  • roller tappet 4 Essential elements of the roller tappet 4 are the rollers 9, which are mounted on the tappet housing 5 via rolling elements 8, and the hydraulic compensating element, also designated in its entirety with 10 in the tappet housing 5.
  • This hydraulic compensation element acts directly on the shaft of the gas exchange valve 1, while the roller 9 rolls on the cam 2.
  • the hydraulic compensating element 10 is supplied with hydraulic medium via a supply bore 11 running in the housing 5 of the roller tappet 4, which is in turn connected to the oil circuit of the internal combustion engine - represented by oil channels 12 in the cylinder head 7.
  • the roller tappet 4 has a centrally arranged compensating element 10 and two diametrically opposite rollers 9a, 9b arranged next to the compensating element 10. This arrangement enables an extremely compact design with only a moment-free introduction of force by the cams 2 or the gas exchange valve 1 low height required.
  • the roller tappet 4 actuates two gas exchange valves 1 a, 1 b.
  • Each of these gas exchange valves is assigned a compensation element 10a, 10b mounted in the tappet housing.
  • two rollers 9a, 9b are arranged diametrically opposite one another on the tappet outside. In the case of an internal combustion engine with several gas exchange valves connected in parallel, the construction effort can be reduced even further with this arrangement.
  • the rollers can be supported by pins which are formed in one piece with the housing 5, and securing rings, plastic caps, spring elements or the like can be provided for axially securing the rollers.
  • securing rings, plastic caps, spring elements or the like can be provided for axially securing the rollers.
  • the plunger is guided via the sliding body-like housing 5, which can be connected to the hydraulic compensation element (s) 10, for example by plastic extrusion coating.
  • the housing 5 can also be made of aluminum and can be provided with a coating at the sliding points.
  • the tappet can be prevented from rotating by the geometric design of the sliding surfaces or, in the case of a cylindrical guide, by the bearing journals of the rollers or their securing elements.
  • the channels 11 for supplying oil can be cast or machined into the housing 5.
  • All of the exemplary embodiments are based on the same basic idea, according to which the required installation space is kept small and the resulting overall height is minimized if the hydraulic compensation element and the roller are arranged essentially next to one another on a roller tappet with a hydraulic compensation element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP91110211A 1990-07-27 1991-06-21 Poussoir à galet avec compensateur de jeu hydraulique Expired - Lifetime EP0468202B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4023886 1990-07-27
DE4023886A DE4023886A1 (de) 1990-07-27 1990-07-27 Rollenstoessel mit einem hydraulischen ausgleichselement

Publications (2)

Publication Number Publication Date
EP0468202A1 true EP0468202A1 (fr) 1992-01-29
EP0468202B1 EP0468202B1 (fr) 1993-05-26

Family

ID=6411134

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110211A Expired - Lifetime EP0468202B1 (fr) 1990-07-27 1991-06-21 Poussoir à galet avec compensateur de jeu hydraulique

Country Status (2)

Country Link
EP (1) EP0468202B1 (fr)
DE (2) DE4023886A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0608925A1 (fr) * 1993-01-28 1994-08-03 General Motors Corporation Poussoins de soupape compact
EP0503145B1 (fr) * 1991-03-13 1994-08-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Poussoir de commande d'au moins deux soupapes
EP3337960B1 (fr) 2015-08-19 2019-11-20 Volvo Truck Corporation Mécanisme d'actionnement de soupape variable, moteur à combustion interne et véhicule

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4211632A1 (de) * 1992-04-07 1993-10-14 Bayerische Motoren Werke Ag Ventilsteuerung für Gaswechselventile einer Brennkraftmaschine
DE4337330C2 (de) * 1993-11-02 1996-03-21 Iav Motor Gmbh Rollenstößel mit zwei Rollen je Ventil für Ventiltriebe von Verbrennungsmotoren mit oben liegender Nockenwelle
DE4410123C2 (de) * 1994-03-24 2003-02-20 Ina Schaeffler Kg Ölversorgung bei einer Ventilbetätigungseinrichtung
DE9406190U1 (de) * 1994-04-14 1994-06-09 INA Wälzlager Schaeffler KG, 91074 Herzogenaurach Vorrichtung zur gleichzeitigen Betätigung von zumindest zwei Gaswechselventilen
DE4415270A1 (de) * 1994-04-30 1995-11-02 Opel Adam Ag Einrichtung zur gleichzeitigen Betätigung zweier Gaswechselventile einer Brennkraftmaschine
DE19803246A1 (de) * 1998-01-28 1999-08-05 Meta Motoren Energietech Vorrichtung zum Betätigen wenigstens eines Ladungswechselventils einer Brennkraftmaschine
DE102010027608A1 (de) 2010-07-19 2012-01-19 Schaeffler Technologies Gmbh & Co. Kg Steuertrieb einer Brennkraftmaschine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253073A1 (fr) * 1986-07-02 1988-01-20 Ford-Werke Aktiengesellschaft Procédé pour produire un dispositif de poussoir à galet avec blocage en rotation pour moteur à combustion interne
EP0268130A1 (fr) * 1986-11-08 1988-05-25 INA Wälzlager Schaeffler KG Compensateur de jeu hydraulique
EP0318151A1 (fr) * 1987-11-23 1989-05-31 General Motors Corporation Compensateur de jeu hydraulique avec clapet multi-directionnel
EP0340461A1 (fr) * 1988-04-30 1989-11-08 INA Wälzlager Schaeffler KG Compensateur de jeu hydraulique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231267A (en) * 1978-11-01 1980-11-04 General Motors Corporation Roller hydraulic valve lifter
DE3624108A1 (de) * 1986-07-17 1988-01-28 Opel Adam Ag Ventiltrieb fuer zumindest zwei gleichzeitig zu betaetigende ventile
DE3743854A1 (de) * 1987-12-23 1989-07-06 Michael Stirm Vierventilsteuerung mit oberen abstuetzelementen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253073A1 (fr) * 1986-07-02 1988-01-20 Ford-Werke Aktiengesellschaft Procédé pour produire un dispositif de poussoir à galet avec blocage en rotation pour moteur à combustion interne
EP0268130A1 (fr) * 1986-11-08 1988-05-25 INA Wälzlager Schaeffler KG Compensateur de jeu hydraulique
EP0318151A1 (fr) * 1987-11-23 1989-05-31 General Motors Corporation Compensateur de jeu hydraulique avec clapet multi-directionnel
EP0340461A1 (fr) * 1988-04-30 1989-11-08 INA Wälzlager Schaeffler KG Compensateur de jeu hydraulique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503145B1 (fr) * 1991-03-13 1994-08-24 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Poussoir de commande d'au moins deux soupapes
EP0608925A1 (fr) * 1993-01-28 1994-08-03 General Motors Corporation Poussoins de soupape compact
US5361733A (en) * 1993-01-28 1994-11-08 General Motors Corporation Compact valve lifters
US5398648A (en) * 1993-01-28 1995-03-21 General Motors Corporation Compact valve lifters
EP3337960B1 (fr) 2015-08-19 2019-11-20 Volvo Truck Corporation Mécanisme d'actionnement de soupape variable, moteur à combustion interne et véhicule

Also Published As

Publication number Publication date
DE4023886A1 (de) 1992-01-30
DE59100131D1 (de) 1993-07-01
EP0468202B1 (fr) 1993-05-26

Similar Documents

Publication Publication Date Title
EP0560812B1 (fr) Installation pour l'actionnement simultane de deux soupapes de cylindre d'un moteur a combustion interne
DE69511627T2 (de) Zwei-Stufen-Ventilstössel
DE4302877C2 (de) Stößel
DE202015009047U1 (de) Ventiltrieb für eine Brennkraftmaschine
DE10204672A1 (de) Schaltelement für einen Ventiltrieb einer Brennkraftmaschine
DE2814096A1 (de) Mehrzylindrige brennkraftmaschine mit ventilabschaltung
DE3704929C2 (fr)
EP0468202B1 (fr) Poussoir à galet avec compensateur de jeu hydraulique
DE10146129A1 (de) Schaltelement für einen Ventiltrieb einer Brennkraftmaschine
DE3503312A1 (de) Hydraulische spielnachstellung
DE10146131A1 (de) Schaltelement für einen Ventiltrieb einer Brennkraftmaschine
DE9306685U1 (de) Stößel
DE4334518A1 (de) Hydraulische Ventilspielausgleichsvorrichtung für ein nockengesteuertes Hubventil
EP0196418B1 (fr) Poussoir hydraulique pour moteurs à combustion interne
DE102015215123A1 (de) Ventiltrieb für eine Brennkraftmaschine
DE10142329A1 (de) Ventiltrieb für eine Brennkraftmaschine
DE4128813A1 (de) Hydraulischer rollenstoessel
DE830433C (de) Stoessel fuer Ventilantrieb
DE4337330C2 (de) Rollenstößel mit zwei Rollen je Ventil für Ventiltriebe von Verbrennungsmotoren mit oben liegender Nockenwelle
DE2517370A1 (de) Hydraulische spielausgleichsvorrichtung
DE4309602C2 (de) Ventilstößel für zumindest zwei Brennkraftmaschinen-Hubventile
DE19932346B4 (de) Ventilspielausgleich für Brennkraftmaschinen
DE4334505A1 (de) Rollenstößel für den Nocken-Ventiltrieb eines Hubventils mit einer hydraulischen Ventilspielausgleichsvorrichtung
DE102017111395A1 (de) Vorrichtung zur Veränderung des Verdichtungsverhältnisses einer Hubkolbenbrennkraftmaschine
DE69100427T2 (de) Schmierungssystem für die Kontaktfläche von einer Nockenwelle und einem hydraulischen Stössel einer Brennkraftmaschine.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19920207

17Q First examination report despatched

Effective date: 19920611

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59100131

Country of ref document: DE

Date of ref document: 19930701

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930621

ET Fr: translation filed
ITF It: translation for a ep patent filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970602

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19970619

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19970630

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980621

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19980621

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990226

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050621