DE69023238T2 - Ventiltriebsanordnung für Mehrventil-Brennkraftmaschine. - Google Patents

Ventiltriebsanordnung für Mehrventil-Brennkraftmaschine.

Info

Publication number
DE69023238T2
DE69023238T2 DE69023238T DE69023238T DE69023238T2 DE 69023238 T2 DE69023238 T2 DE 69023238T2 DE 69023238 T DE69023238 T DE 69023238T DE 69023238 T DE69023238 T DE 69023238T DE 69023238 T2 DE69023238 T2 DE 69023238T2
Authority
DE
Germany
Prior art keywords
valve
combustion engine
internal combustion
drive arrangement
valve drive
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 - Fee Related
Application number
DE69023238T
Other languages
English (en)
Other versions
DE69023238D1 (de
Inventor
Hiroaki Onodera
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.)
Yamaha Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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
Priority claimed from JP3258989A external-priority patent/JP2751066B2/ja
Priority claimed from JP1032587A external-priority patent/JP2751064B2/ja
Priority claimed from JP3258889A external-priority patent/JP2751065B2/ja
Priority claimed from JP7830289A external-priority patent/JPH02259206A/ja
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Application granted granted Critical
Publication of DE69023238D1 publication Critical patent/DE69023238D1/de
Publication of DE69023238T2 publication Critical patent/DE69023238T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • F01L1/143Tappets; Push rods for use with overhead camshafts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • F01L1/0532Camshafts overhead type the cams being directly in contact with the driven valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/26Valve-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
    • F01L1/265Valve-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 peculiar to machines or engines with three or more intake valves per cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/02Cylinders; Cylinder heads  having cooling means
    • F02F1/10Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/108Siamese-type cylinders, i.e. cylinders cast together
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F1/42Shape or arrangement of intake or exhaust channels in cylinder heads
    • F02F1/4214Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
    • F02F1/4221Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/026Gear drive
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08Shape of cams
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L1/185Overhead end-pivot rocking arms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • F01L2001/0535Single overhead camshafts [SOHC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02Valve drive
    • F01L1/04Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047Camshafts
    • F01L1/053Camshafts overhead type
    • F01L2001/0537Double overhead camshafts [DOHC]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-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
    • F01L2003/25Valve configurations in relation to engine
    • F01L2003/251Large number of valves, e.g. five or more
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L3/00Lift-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
    • F01L2003/25Valve configurations in relation to engine
    • F01L2003/256Valve configurations in relation to engine configured other than perpendicular to camshaft axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B1/00Engines characterised by fuel-air mixture compression
    • F02B1/02Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/08Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
    • F02B2023/085Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition using several spark plugs per cylinder
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/18DOHC [Double overhead camshaft]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00Cylinders; Cylinder heads 
    • F02F1/24Cylinder heads
    • F02F2001/244Arrangement of valve stems in cylinder heads
    • F02F2001/245Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
DE69023238T 1989-02-14 1990-02-14 Ventiltriebsanordnung für Mehrventil-Brennkraftmaschine. Expired - Fee Related DE69023238T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3258989A JP2751066B2 (ja) 1989-02-14 1989-02-14 多弁式4サイクルエンジン
JP1032587A JP2751064B2 (ja) 1989-02-14 1989-02-14 6弁式4サイクルエンジン
JP3258889A JP2751065B2 (ja) 1989-02-14 1989-02-14 多弁式4サイクルエンジン
JP7830289A JPH02259206A (ja) 1989-03-31 1989-03-31 多弁式4サイクルエンジン

Publications (2)

Publication Number Publication Date
DE69023238D1 DE69023238D1 (de) 1995-11-30
DE69023238T2 true DE69023238T2 (de) 1996-04-04

Family

ID=27459643

Family Applications (3)

Application Number Title Priority Date Filing Date
DE69027871T Expired - Fee Related DE69027871T2 (de) 1989-02-14 1990-02-14 Zylinderkopf und Ventiltriebanordnung für Mehrventil-Brennkraftmaschine
DE69027032T Expired - Fee Related DE69027032T2 (de) 1989-02-14 1990-02-14 Nockenwellenanordnung für eine Mehrventil-Brennkraftmaschine
DE69023238T Expired - Fee Related DE69023238T2 (de) 1989-02-14 1990-02-14 Ventiltriebsanordnung für Mehrventil-Brennkraftmaschine.

Family Applications Before (2)

Application Number Title Priority Date Filing Date
DE69027871T Expired - Fee Related DE69027871T2 (de) 1989-02-14 1990-02-14 Zylinderkopf und Ventiltriebanordnung für Mehrventil-Brennkraftmaschine
DE69027032T Expired - Fee Related DE69027032T2 (de) 1989-02-14 1990-02-14 Nockenwellenanordnung für eine Mehrventil-Brennkraftmaschine

Country Status (3)

Country Link
US (2) US5016592A (de)
EP (3) EP0479773B1 (de)
DE (3) DE69027871T2 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35382E (en) * 1989-07-14 1996-11-26 Yamaha Hatsudoki Kabushiki Kaisha Lubrication arrangement for engine
US5094197A (en) * 1991-03-01 1992-03-10 Ferrari S.P.A. Timing system, particularly for an internal combustion engine with a number of valves per cyclinder
JPH04292526A (ja) * 1991-03-20 1992-10-16 Honda Motor Co Ltd 4サイクル内燃機関
DE4116944C2 (de) * 1991-05-24 1997-05-22 Daimler Benz Ag Zylinderkopf für eine mehrzylindrige Brennkraftmaschine
EP0555228B1 (de) * 1991-08-30 1996-07-31 Caterpillar Inc. Modifizierter zylinderkopf
DE69310086T2 (de) * 1992-10-28 1997-07-31 Yamaha Motor Co Ltd Zylinderkopf und Ventilanordnung einer Mehrventil-Brennkraftmaschine
JP3362227B2 (ja) * 1992-12-30 2003-01-07 メタ モトーレン‐ ウント エネルギー‐テヒニク ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関の弁を可変制御するための装置、特に火花点火機関を非絞り負荷制御するための装置
JPH07197848A (ja) * 1993-12-29 1995-08-01 Yamaha Motor Co Ltd 多気筒エンジンのシリンダヘッド
US5375568A (en) * 1994-07-06 1994-12-27 Manolis; John Multivalve internal combustion engine
US5758612A (en) * 1994-08-31 1998-06-02 Yamaha Hatsudoki Kabushiki Kaisha Valve actuating structure for multi-valve engine
JP3308754B2 (ja) * 1995-02-15 2002-07-29 ヤマハ発動機株式会社 エンジンの排気再循環装置
FR2739895B1 (fr) * 1995-10-13 1997-12-12 Inst Francais Du Petrole Moteur a combustion interne a quatre temps et a allumage commande et injection directe de carburant
DE19730842A1 (de) * 1997-07-18 1999-01-21 Audi Ag Brennkraftmaschine
GB2343714A (en) * 1998-11-14 2000-05-17 Ford Global Tech Inc Stratified charge i.c. engine with separately controlled ignition of plural spark plugs in each combustion chamber
US6443111B1 (en) 1999-05-14 2002-09-03 Ladow Ron Poly valve system for internal combustion engines
US6457444B1 (en) 1999-05-14 2002-10-01 Ladow Ron Poly valve system for internal combustion engines having non-parallel valve arrangement
US7395790B2 (en) * 2004-11-18 2008-07-08 S&S Cycle, Inc. Reed valve breather for evolution engine
JP5078313B2 (ja) * 2006-10-17 2012-11-21 川崎重工業株式会社 自動二輪車
US8131433B2 (en) 2007-05-23 2012-03-06 Cnh America Llc Device for longitudinally balancing an agricultural vehicle
KR100885464B1 (ko) * 2008-05-14 2009-02-25 송광재 4행정 내연기관의 흡배기 장치
GB2528259B (en) * 2014-07-14 2020-06-03 Ford Global Tech Llc Selectively deactivatable engine cylinder

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB242919A (en) * 1925-07-10 1925-11-19 Napier & Son Ltd Improvements in or relating to valve operating mechanism for internal combustion engines
US1623826A (en) * 1926-06-07 1927-04-05 Joseph F Burleson Poppet valve
US3137283A (en) * 1962-06-28 1964-06-16 Sampietro Achille Carlo Valve gear
JPS5638520A (en) * 1979-09-04 1981-04-13 Honda Motor Co Ltd Four-cycle internal combustion engine
JPS5641419A (en) * 1979-09-10 1981-04-18 Honda Motor Co Ltd Four-cycle internal combustion engine
JPS57102506A (en) * 1980-12-18 1982-06-25 Yamaha Motor Co Ltd Engine with four valves and one overhead cam shaft
JPS57176311A (en) * 1981-04-22 1982-10-29 Yamaha Motor Co Ltd Four-cycle engine
US4658780A (en) * 1981-05-08 1987-04-21 Yamaha Hatsudoki Kabushiki Kaisha Four cycle internal combustion engine
GB2105785B (en) * 1981-09-10 1984-10-03 Honda Motor Co Ltd Controlling opening of multiple i c engine intake and exhaust valves
AT382933B (de) * 1984-03-14 1987-04-27 Weichsler Hermann Ventilbetaetigung fuer hubkolben - brennkraftmaschinen
DE3421028A1 (de) * 1984-06-06 1985-12-12 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Nockenwellenantrieb einer brennkraftmaschine
JPH0646005B2 (ja) * 1984-06-12 1994-06-15 ヤマハ発動機株式会社 動弁用カム軸の軸受構造
JPS618415A (ja) * 1984-06-20 1986-01-16 Nissan Motor Co Ltd 内燃機関の動弁装置
SE464099B (sv) * 1985-01-29 1991-03-04 Honda Motor Co Ltd Foerbraenningsmotor innefattande cylinder med ovalt tvaersnitt
JPS61178507A (ja) * 1985-02-04 1986-08-11 Toyota Motor Corp シリンダヘツド
US4617881A (en) * 1985-03-29 1986-10-21 Yamaha Hatsudoki Kabushiki Kaisha Actuating mechanism for multiple valve internal combustion engine
JPH0219521Y2 (de) * 1985-04-17 1990-05-30
KR890001689Y1 (ko) * 1985-08-06 1989-04-07 마쓰다 가부시기가이샤 엔진의 캠축 구동장치
AT404388B (de) * 1986-02-20 1998-11-25 Weichsler Hermann Brennkraftmaschine
GB2213196B (en) * 1987-12-08 1991-10-02 Aston Martin Tickford Multivalve cylinder head
DE3818635A1 (de) * 1988-06-01 1989-12-07 Bayerische Motoren Werke Ag Hubkolben-brennkraftmaschine mit obenliegenden steuerwellen in einem mehrventil-zylinderkopf
DE8813425U1 (de) * 1988-10-26 1988-12-29 Audi Ag, 8070 Ingolstadt, De
US4938192A (en) * 1989-05-02 1990-07-03 Pavo Pusic Piston cylinder combination with engine cylinder wall having valve ports and combustion chamber
DE3921716A1 (de) * 1989-07-01 1991-01-10 Porsche Ag Nockenwellenantrieb eines mehrzylinder-v-motors
JPH0723698B2 (ja) * 1989-08-11 1995-03-15 マツダ株式会社 多弁式エンジンの吸気装置
JPH03107519A (ja) * 1989-09-21 1991-05-07 Mazda Motor Corp 多弁式エンジンの燃焼室構造

Also Published As

Publication number Publication date
DE69027871D1 (de) 1996-08-29
EP0383297A3 (en) 1990-10-24
EP0383297B1 (de) 1996-07-24
EP0483109B1 (de) 1996-05-15
US5016592A (en) 1991-05-21
DE69027871T2 (de) 1996-11-28
EP0383297A2 (de) 1990-08-22
EP0479773A2 (de) 1992-04-08
US5111791A (en) 1992-05-12
EP0483109A3 (en) 1992-07-01
EP0479773B1 (de) 1995-10-25
DE69027032T2 (de) 1996-09-26
DE69023238D1 (de) 1995-11-30
EP0483109A2 (de) 1992-04-29
DE69027032D1 (de) 1996-06-20
EP0479773A3 (en) 1992-07-01

Similar Documents

Publication Publication Date Title
DE69003469D1 (de) Ventilantriebsvorrichtung für eine Viertaktbrennkraftmaschine.
DE69110342T2 (de) Ventiltriebvorrichtung für Viertaktbrennkraftmaschine.
DE69023238D1 (de) Ventiltriebsanordnung für Mehrventil-Brennkraftmaschine.
DE69018747T2 (de) Kipphebelanordnung für verstellbaren Ventilantrieb in einer Brennkraftmaschine.
DE59004045D1 (de) Elektrohydraulische ventilsteuervorrichtung für brennkraftmaschinen.
DE69410895D1 (de) Belüfteter Hubventilmechanismus für Brennkraftmaschinen
DE69110332T2 (de) Ventilantriebsvorrichtung für Viertaktbrennkraftmaschine.
DE59301164D1 (de) Ventilantrieb für eine Brennkraftmaschine
DE69101199T2 (de) Ventiltrieb für Brennkraftmaschinen.
DE69305894D1 (de) Ventilantrieb für eine Brennkraftmaschine
DE59301091D1 (de) Ventilantriebsanordnung für eine Brennkraftmaschine.
DE69009097D1 (de) Ventilvorrichtung für Brennkraftmaschine.
DE59008011D1 (de) Drosselklappe für eine Brennkraftmaschine.
DE68908861D1 (de) Nockenwellenantriebsanordnung für Brennkraftmaschine.
DE69004806T2 (de) Nockenwelle für mehrventilbrennkraftmaschine.
DE59107319D1 (de) Hydraulischer ventilstössel für eine brennkraftmaschine
DE69006123T2 (de) Ventilsteuervorrichtung für Brennkraftmaschine.
DE69016289T2 (de) Ventiltriebeinrichtung für Brennkraftmaschine.
DE68912609T2 (de) Ventiltriebvorrichtung für eine Brennkraftmaschine.
DE69303740D1 (de) Ventilantrieb für eine Brennkraftmaschine
DE3884364D1 (de) Ventilsteuervorrichtung für Mehrventil-Brennkraftmaschine.
DE69007728T2 (de) Ventiltriebvorrichtung für Brennkraftmaschine.
DE69019682T2 (de) Ventilvorrichtung für Mehrventilbrennkraftmaschine.
DE59203083D1 (de) Mechanischer Ventilstössel für eine Brennkraftmaschine.
DE3650636D1 (de) Ventilantriebmechanismus für Brennkraftmaschine

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee