EP0090105A1 - Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne - Google Patents

Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne Download PDF

Info

Publication number
EP0090105A1
EP0090105A1 EP82301647A EP82301647A EP0090105A1 EP 0090105 A1 EP0090105 A1 EP 0090105A1 EP 82301647 A EP82301647 A EP 82301647A EP 82301647 A EP82301647 A EP 82301647A EP 0090105 A1 EP0090105 A1 EP 0090105A1
Authority
EP
European Patent Office
Prior art keywords
valve
spring retainer
cap
valve spring
adjustor
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
EP82301647A
Other languages
German (de)
English (en)
Other versions
EP0090105B1 (fr
Inventor
Alfred Anthony Black
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE8282301647T priority Critical patent/DE3280067D1/de
Priority to EP82301647A priority patent/EP0090105B1/fr
Priority to EP88121323A priority patent/EP0375792B1/fr
Publication of EP0090105A1 publication Critical patent/EP0090105A1/fr
Application granted granted Critical
Publication of EP0090105B1 publication Critical patent/EP0090105B1/fr
Expired 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
    • 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

Definitions

  • This invention relates to valve adjustment means for internal combustion engines having overhead cams or rocker arms and more particularly relates to a valve spring retainer including means for adjustment of the gap between the cam shaft and/or rocker arm and valve stem, and an hydraulic embodiment of same.
  • valves In typical overhead cam engines the valves are operated by a rocker arm pushing on the valve stem or cam shaft pushing on bucket tappets.
  • the rocker arm is usually actuated by a cam located in association therewith.
  • gaps are usually provided between the valve stem and rocker arm.
  • Most adjustments of the cap mentioned above are accomplished by means of locked screw or the use of shims placed within the bucket member positioned over the valve spring retainer. Although such adjustments are relatively simple, in many instances one must remove the cam shaft from the vehicle in order to place the shims in position under the bucket.
  • the bucket may be adjusted by providing a screw member threaded across the top of the valve stem at an angle so that if it is rotated upward it raises the bucket or if it is rotated downward it lowers the bucket.
  • a gap adjustment device that is pertinent to the device of this invention is disclosed in U.S. Patent No. 2,722,204, issued to
  • Adolph Wente entitled “Means for Adjusting the Lost Motion of the Valve Actuation in Internal Combustion Engines.” This system provides adjusting means that utilize a threaded valve stem on which a nut-like member is rotatably threaded. Systems such as this must provide means to prevent rotation of the valve stem when the nut is rotated thereon for adjustment.
  • a device for gap adjustment between a valve stem and its operation means within an internal combustion engine comprising:
  • the device comprises a valve spring retainer base which is adapted to fit over the valve spring and has an aperture through a central portion thereof for receipt of the valve stem, and lip means for the engagement of an outer and inner valve spring if such is used in the engine.
  • the valve spring retainer base further has a central portion threaded on its inside and an upwardly extending outer portion threaded along its inside.
  • the outer valve spring lip member located below the outer threaded portion of the valve spring retainer base projects downward to fit over, engage, and retain the valve's outer spring.
  • a lock bolt receipt aperture whose function will be described below.
  • a valve adjustor cap is also provided having on its bottom a central projection with threads upon the outer portion thereof adapted to be threadedly engaged into the inner threaded portion of the valve spring retainer base.
  • the valve adjustor cap has along its outer periphery a threaded portion adapted to engage into the outer threaded portion of the valve spring retainer base.
  • the top of the valve adjustor cap has a section thereon which is polygonal, e.g., hexagonal, and is adapted to be engaged for the rotation by a wrench within the valve spring retainer base.
  • a lock bolt is provided along with a cap lock member having an aperture therein through which the lock bolt may pass.
  • the cap lock member has a lip member adapted to engage into a selected one of a plurality of apertures disposed around the periphery of the valve adjustor cap so that when the valve adjustor cap is rotated within the valve spring retainer base to its desired height for the adjustment of the gap between the valve stem and the rocker arm, it may be locked into position by the placement of the cap lock member with the lip or lips thereof engaged into the nearest of the apertures within the valve adjustor cap.
  • the lock bolt is then passed through the aperture within the cap lock member and passed into the lock bolt receipt aperture in the valve spring retainer base and is affixed into position by a nut threaded on its extending portion.
  • valve stem spring member which fits therein and a valve stem bushing.
  • the valve stem bushing has a projection upon one side thereof which engages the valve stem spring member.
  • the valve stem bushing is adapted to fit into the valve stem bushing receipt area defined within the valve spring retainer base.
  • the valve stem receipt aperture defined in the valve spring retainer base is constructed somewhat more narrowly at its base than at its top.
  • valve stem When the valve stem is positioned therein, a valve keeper key is placed within a groove in the top of the valve stem which is then adapted to move freely in the top of the valve stem receipt aperture but not pass downward out of the valve stem receipt aperture due to the fact that the base of the valve stem receipt aperture is narrower than the valve keeper key positioned on the valve stem.
  • this key When positioned on the valve stem, this key retains the structure of this embodiment in place on top of the valve stem, and the valve spring is compressed keeping the valve in an upward position closing its associated port.
  • valve adjustor cap supported at both its center and its periphery rather than merely at one or the other position to prevent deformation at its centre and to help distribute the force load more evenly over the top surface of the valve adjustor cap. It is expected that in the operation of this device, the valve stem will rotate to various positions during use which rotation assists in the distribution of any stress thereon.
  • the valve adjustor cap constructed of two pieces, one being the outer threaded ring with a lip for the support of the outer portion of the inner cap.
  • This outer threaded ring can have a plurality of projections extending from its top so that when the cap is threaded into the central thread of the valve adjustor base, these projections can be grasped by a tool and the outer threaded ring rotated to raise its lip to support the periphery of the valve cap.
  • the valve adjustor cap may also have an insert aperture defined therein to receive a polygonal hardened steel insert if the valve cap and valve spring retainer base are to be constructed of aluminium or other light metal which might wear too easily from the action of the rocker arm or cam.
  • the spring-loaded bushing is provided to help keep the valve in place when the device of this embodiment is depressed. It further assures that the 'valve stem will move downward at the same time or at an extemely short time after the device of this embodiment has started its downward movement. It still further allows for the possibility of expansion of the valve stem therein especially when the retainer adjustor is adjusted for a zero gap. Further, it helps eliminate a certain amount of the noise caused by the valve stem striking directly against the valve adjustor cap. It also keeps pressure on the valve stem even when the device of this embodiment is depressed to prevent or minimize any upward movement of the valve stem on its own as the depressing force of the valve cap is not focused directly upon the stem of the valve but it is on the valve spring.
  • valve spring retainer base there may be provided one or more holes drilled within the valve spring retainer base as well as the cap that would allow oil to circulate within the chamber formed between the valve spring retainer base and the valve adjustor cap.
  • the oil circulating through these holes will provide lubrication within the chamber and will also assist in decreasing noise by filling the relatively open chamber in which there might tend to be certain resonances.
  • This embodiment will also assist in keeping the valve spring retainer base and valve adjustor cap cooler so that heat from cam shaft friction and heat transferred from the valve head through the valve stem to this embodimentwould not cause significant expansion thereof.
  • valve adjustor base and cap member which can be utilized with hydraulic lifters. Since no adjustments are needed in hydraulic lifters as are needed in mechanical lifters, there are no threaded parts provided between the cap member and the valve spring retainer base.
  • a chamber is provided within the cap member which, when positioned within the valve spring retainer base, is held in position by a semicircular clip which fits within a groove provided in the upper outer portion of the valve spring retainer base.
  • An hydraulic piston is positioned above a valve stem bushing and has provided therebetween a preloaded spring and ball combination for the capture of hydraulic fluid therein upon the downward thrust of the cam or the rocker arm.
  • the piston may be hollowed in its upper portion and have an aperture in its bottom aligned with the ball.
  • the ball operates as an hydraulic valve for the piston, the piston being just above the ball, riding in the bore just above the pressure chamber.
  • the cap member When the cap member is depressed, it moves the piston inward toward the centre of its chamber, thereby compressing oil within the pressure chamber which action provides the means for transferring the movement of the cap member to the valve spring retainer base due to the minimal compressibility of the oil therein.
  • some oil Upon release of pressure on the device of this invention some oil will feed backwards out of the reservoir formed in the hollow of the piston and corresponding hollow in the cap member through the centre hole of the piston. This flow is controlled by the ball which closes off the oil return under pressure while at times when there is no force thereupon, the hole allows oil to enter the reservoir above the ball.
  • the design of the hydraulic embodiment of this invention has advantages over the current art which incorporates an hydraulic lifter within a separate housing bored into the top of the cylinder head.
  • the hydraulic embodiment of this invention is held in position by the clip on the valve stem and the pressure of the valve spring upwards against the valve spring retainer base.
  • This embodiment simplifies substantially the construction of hydraulic lifters and lessens significantly their weight.
  • a valve stem bushing acts as a seal and prevents the escape of oil fluid from the pressure chamber down along the valve stem.
  • the valve stem bushing can be threaded into its position to prevent its movement out of its seat or sealed in position by an 0-ring or a pressed-in cup insert.
  • holes can be provided within the valve spring retainer base in the midsection between its outer periphery and central section which would tend to lighten the structure and also allow oil to circulate therein which, as mentioned above, would lessen the noise from resonance and act as a reservoir of oil from which the pressure chamber would draw for its proper operation. It should be noted that in this embodiment there is an additional reservoir if the engine should run low on oil, oil would still be provided within the pressure chamber due to its being trapped betweeen the valve spring retainer base and the cap member.
  • An alternative embodiment of the hydraulic version of this invention utilizes a hardened steel upper cap member with a lower cap member made of aluminium having a reservoir defined therein. Below the reservoir is a hardened steel cup member with an aperture defined therein. No bushing is used, but a second hardened steel cup member is placed in the valve spring retainer base and contains a hollow piston member. Within the upwardly facing hollow is the spring cap and ball which control entry of fluid from the reservoir.
  • a valve spring retainer base 10 has on its bottom portion a protruding outer valve spring retaining lip 12 into which is engaged outer valve spring 20. Also seen in this view are inner valve spring lip 14 into which is engaged inner valve spring 18, and valve stem receipt aperture 16 into which the valve stem passes. Aperture 16 is somewhat narrower at its base than at its top and acts to engage the valve stem due to a small clip inserted into a groove at the top of the valve stem.
  • the valve stem is not shown in this illustration for the sake of clarity since such a valve stem and clip within a groove are well-known in the prior art and are used in the prior art to hold the valve spring cap in place thereon. Seen in a central portion of the valve spring retainer base 10 is valve stem bushing receipt ledge 52.
  • Projection 21 is centrally positioned above the valve stem receipt aperture and has a threaded portion 22 along its insides.
  • Valve spring retainer base 10 has an upwardly extending portion 23 along its periphery having along the inside thereof an inner threaded portion 24.
  • valve adjustor cap 26 Seen threaded into valve spring retainer base 10 is valve adjustor cap 26 which has positioned on its top a hexagonal member 32 for easy rotation thereof as mentioned below in relation to the valve spring retainer base 10.
  • Such valve spring retainer base may be constructed as an insert into a cap receipt aperture 33. A portion of the valve adjustor cap 26 protrudes downward at a central portion, its threading 27 engaging central threaded portion 22 of the valve spring retainer base 10.
  • valve adjustor cap 30 can also be threaded to engage into, and adjust in an upward and downward fashion as it is rotated within, the valve spring retainer base 10.
  • the valve adjustor cap can be constructed having a separate outer threaded ring portion 35 having a lip 37 adapted so that the valve adjustor cap may be supported by the lip around the cap's periphery.
  • a plurality of adjustment projections 39 extend from threaded ring portion so that when the cap is centrally threaded, the threaded ring portion 35 can be backed up to it to support it by grasping and rotating such adjustment projections by a tool designed to engage them.
  • lock bolt 36 passing through the cap lock member 38 and into the lock bolt receipt aperture 34 defined within the valve spring retainer base 10.
  • the cap lock member is positioned within selected ones of the plurality of cap lock member holes 40 seen within the valve adjustor cap.
  • a valve stem bushing 46 is provided and adapted to rest upon its ledge 52 within the valve spring retainer base, and a spring member 45 is provided to engage both a protruding portion 47 of the valve stem bushing 46 and a projection 42 thereabove on the valve adjustor cap to keep pressure on the valve stem as described above.
  • a plurality of apertures 50 may be provided within the. valve spring retainer base and adjustor cap member to allow for the flow of oil therethrough.
  • valve spring retainer base 60 has a similar shape as the shape of the valve spring retainer base 60 has similar shape as the shape of the valve spring retainer base of the mechanical version except that central portion 62 and the outer portion 64 of the valve spring retainer base are not threaded.
  • Retainer cap 66 is positioned within the valve spring retainer base and is held in place by retainer clip 68 which fits within groove 70 within the valve spring retainer base 60.
  • a valve stem bushing 72 is located on ledge 74 above the valve stem receipt aperture 76 above which is positioned piston 78 which rides within pressure chamber 80 formed by projections 82 extending from valve spring retainer base 60.
  • At least one aperture 90 can be provided to allow for the entrance of oil into resevior 81 for the hydraulic action as described above and one or more apertures 92, 93 may be positioned within the valve spring retainer base 60 and cap 66 to allow for the entrance of oil therein.
  • FIG. 3 Illustrated in Figure 3 is the second embodiment of the hydraulic version utilizing hardened cap 191 above lower cap 192 which has a reservoir 94 defined therein with oil entrance aperture 96 to allow oil into the reservoir.
  • No bushing is used and this embodiment has an upper hardened steel cap 100 with an aperture defined therein positioned below the reservoir and a lower hardened steel cap 102 positioned above the valve stem receipt aperture 101.
  • Within cap 102 is hollow piston 104.
  • ball 108 aligned with the aperture in the upper cap 100.
  • cup 110 and spring l12 which extends to the inside hollow of piston 104.
  • Figure 4 illustrates another alternate embodiment of the device of this invention having the cap member 200 constructed of a solid piece.
  • the valve spring retainer base and bushing can be constructed of aluminium or other light weight metal and the cap member may be made of the same material or of a harder steel-like material as mentioned above to resist wear.
  • Figure 5 illustrates a further alternate embodiment having a cap member with a round top 300 having apertures 302 defined therein for receipt of projections on a tool for the rotation thereof.
  • this embodiment only the central portion 304 of the engagement between the cap and the valve spring retainer base is threaded and there are no threads or other engagement means at the peripheral areas 306.
  • This embodiment is useful in applications for example when useing a rocker arm which strikes only the central portion of the cap member.
  • Figure 6 illustrates still yet another embodiment having the cap member only peripherally threaded. This embodiment is especially useful for smaller retainer members such as are used in motorcycles and other small engines.
  • valve spring retainer cap can be set at a smaller gap or at a zero lash than is now possible with present cap-adjusting devices without the significant problem of the valve head being forced into the valve chamber upon the thermal expansion of the valve stem.
  • the gap above the bushing allows the stem to expand therein by upward movement thereof. Since the bushing in the mechanical embodiment herein is not retained rigidly in place, it can allow the valve stem to move somewhat into the valve stem retainer.
  • valve stem retainer embodying this invention will advantageously provide a place of movement by its deformation when struck by the valve stem 'in situations where the engine is over-revved and the valve head is hit by the piston. This destruction or deformation of the bushing dissipates the destructive force, minimizing damage to the valve so that repairs may be made easily to the device embodying this invention without having to pull the head off the engine to reach a damaged valve.

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)
EP82301647A 1982-03-29 1982-03-29 Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne Expired EP0090105B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8282301647T DE3280067D1 (de) 1982-03-29 1982-03-29 Verstellbarer ventilfederteller fuer eine brennkraftmaschine.
EP82301647A EP0090105B1 (fr) 1982-03-29 1982-03-29 Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne
EP88121323A EP0375792B1 (fr) 1982-03-29 1982-03-29 Cuvette du ressort de soupape réglable pour un moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82301647A EP0090105B1 (fr) 1982-03-29 1982-03-29 Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP88121323.5 Division-Into 1982-03-29

Publications (2)

Publication Number Publication Date
EP0090105A1 true EP0090105A1 (fr) 1983-10-05
EP0090105B1 EP0090105B1 (fr) 1989-12-20

Family

ID=8189622

Family Applications (2)

Application Number Title Priority Date Filing Date
EP82301647A Expired EP0090105B1 (fr) 1982-03-29 1982-03-29 Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne
EP88121323A Expired - Lifetime EP0375792B1 (fr) 1982-03-29 1982-03-29 Cuvette du ressort de soupape réglable pour un moteur à combustion interne

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP88121323A Expired - Lifetime EP0375792B1 (fr) 1982-03-29 1982-03-29 Cuvette du ressort de soupape réglable pour un moteur à combustion interne

Country Status (2)

Country Link
EP (2) EP0090105B1 (fr)
DE (1) DE3280067D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375792A1 (fr) * 1982-03-29 1990-07-04 Alfred Anthony Black Cuvette du ressort de soupape réglable pour un moteur à combustion interne
GB2231113A (en) * 1989-04-19 1990-11-07 Mico Ind Automation Arrangement for securing a roller pin
EP0515772B1 (fr) * 1991-05-28 1994-09-28 Firma Carl Freudenberg Commande de soupape pour culasse de moteur à combustion interne
DE10037577A1 (de) * 2000-08-02 2002-02-14 Bayerische Motoren Werke Ag Schließfeder-Vorrichtung für den Ventiltrieb eines Gaswechselventils einer Brennkraftmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857005A (en) * 1931-08-01 1932-05-03 Joseph G Schotthoefer Valve mechanism for internal combustion engines
US1972477A (en) * 1932-02-03 1934-09-04 Herbert H Engemann Automatic device for tappet valve adjustments
US2722204A (en) * 1953-06-05 1955-11-01 Daimler Benz Ag Means for adjusting the lost motion of the valve actuation in internal combustion engines
CH322762A (de) * 1954-06-11 1957-06-30 Sulzer Ag Hydraulische Vorrichtung zum Ausgleich des Ventilspiels
US3675631A (en) * 1970-06-03 1972-07-11 William J Hixson Adjustable cam follower
DE2302093A1 (de) * 1972-01-18 1973-08-02 Lamb Co F Jos Ventil
FR2370858A1 (fr) * 1976-11-16 1978-06-09 Motomak Element de rattrapage de jeu hydraulique pour moteurs a combustion interne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0030781B1 (fr) * 1979-12-05 1989-12-13 Eaton Corporation Poussoir hydraulique pour vanne à entrainement direct
DE3006644A1 (de) * 1980-02-22 1981-09-03 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Ventilstoessel fuer brennkraftmaschinen mit obenliegender nockenwelle
DE3280067D1 (de) * 1982-03-29 1990-01-25 Alfred Anthony Black Verstellbarer ventilfederteller fuer eine brennkraftmaschine.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1857005A (en) * 1931-08-01 1932-05-03 Joseph G Schotthoefer Valve mechanism for internal combustion engines
US1972477A (en) * 1932-02-03 1934-09-04 Herbert H Engemann Automatic device for tappet valve adjustments
US2722204A (en) * 1953-06-05 1955-11-01 Daimler Benz Ag Means for adjusting the lost motion of the valve actuation in internal combustion engines
CH322762A (de) * 1954-06-11 1957-06-30 Sulzer Ag Hydraulische Vorrichtung zum Ausgleich des Ventilspiels
US3675631A (en) * 1970-06-03 1972-07-11 William J Hixson Adjustable cam follower
DE2302093A1 (de) * 1972-01-18 1973-08-02 Lamb Co F Jos Ventil
FR2370858A1 (fr) * 1976-11-16 1978-06-09 Motomak Element de rattrapage de jeu hydraulique pour moteurs a combustion interne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0375792A1 (fr) * 1982-03-29 1990-07-04 Alfred Anthony Black Cuvette du ressort de soupape réglable pour un moteur à combustion interne
GB2231113A (en) * 1989-04-19 1990-11-07 Mico Ind Automation Arrangement for securing a roller pin
GB2231113B (en) * 1989-04-19 1993-06-16 Mico Ind Automation Arrangement for securing a roller pin
EP0515772B1 (fr) * 1991-05-28 1994-09-28 Firma Carl Freudenberg Commande de soupape pour culasse de moteur à combustion interne
DE10037577A1 (de) * 2000-08-02 2002-02-14 Bayerische Motoren Werke Ag Schließfeder-Vorrichtung für den Ventiltrieb eines Gaswechselventils einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE3280067D1 (de) 1990-01-25
EP0375792B1 (fr) 1995-01-18
EP0090105B1 (fr) 1989-12-20
EP0375792A1 (fr) 1990-07-04

Similar Documents

Publication Publication Date Title
US6253730B1 (en) Engine compression braking system with integral rocker lever and reset valve
KR100689076B1 (ko) 밸브 시팅을 제어하는 엔진 밸브 작동기
US5626116A (en) Dedicated rocker lever and cam assembly for a compression braking system
US5934232A (en) Engine valve lift mechanism
US20070295293A1 (en) Valve lifter assembly for selectively deactivating a cylinder
US4321894A (en) Poppet valve spring retainer with integral mechanical adjustable tappet
US5546899A (en) Valve train load transfer device for use with hydraulic roller lifters
US4440121A (en) Locknut device for engine rocker arm adjustment
JPH0253602B2 (fr)
US4411229A (en) Cylinder deactivation device
US5445119A (en) Tappet and shim assembly for internal combustion engine
CA1322499C (fr) Soupapes et dispositif de commande a jeu variable pour moteur a soupapes en tete
US11053819B2 (en) Valve bridge systems comprising valve bridge guide
US5706771A (en) Hydraulic element assembly
EP0090105A1 (fr) Cuvette réglable pour le bas du ressort de soupape pour un moteur à combustion interne
US5860398A (en) Engine tappet
US4469057A (en) Poppet valve spring retainer with integral mechanical adjustable tappet
CA1256764A (fr) Cale-ressort de soupapes a reglage mecanique/ hydraulique pour moteur a combustion interne
US4483281A (en) Poppet valve spring retainer with integral hydraulic tappet
US11619147B2 (en) Valve actuation system comprising parallel lost motion components deployed in a rocker arm and valve bridge
US1872083A (en) Valve adjusting mechanism
JPS58167813A (ja) 内燃エンジン用機械／油圧調整機構を備えたポペツトバルブスプリングリテ−ナ
GB2268242A (en) Engine valve train
US5596960A (en) Internal combustion engine
KR20220105673A (ko) 실린더 비활성화 및 보조 밸브 작동에 사용하기 위한 직렬 로스트 모션 구성요소들을 포함하는 밸브 작동 시스템

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

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19840323

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 SE

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

Ref country code: SE

Effective date: 19891220

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;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: 19891220

REF Corresponds to:

Ref document number: 3280067

Country of ref document: DE

Date of ref document: 19900125

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

Ref country code: FR

Payment date: 19900330

Year of fee payment: 9

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

Ref country code: DE

Payment date: 19900411

Year of fee payment: 9

ET Fr: translation 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: GB

Payment date: 19910325

Year of fee payment: 10

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

Ref country code: FR

Effective date: 19911129

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

Ref country code: DE

Effective date: 19920101

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: GB

Effective date: 19920329

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