EP0063385B1 - Four-cycle internal combustion engine - Google Patents

Four-cycle internal combustion engine Download PDF

Info

Publication number
EP0063385B1
EP0063385B1 EP19820103323 EP82103323A EP0063385B1 EP 0063385 B1 EP0063385 B1 EP 0063385B1 EP 19820103323 EP19820103323 EP 19820103323 EP 82103323 A EP82103323 A EP 82103323A EP 0063385 B1 EP0063385 B1 EP 0063385B1
Authority
EP
European Patent Office
Prior art keywords
valves
intake
exhaust
combustion chamber
intake valves
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
Application number
EP19820103323
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0063385A2 (en
EP0063385A3 (en
Inventor
Masaaki Yoshikawa
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=13182766&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0063385(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Publication of EP0063385A2 publication Critical patent/EP0063385A2/en
Publication of EP0063385A3 publication Critical patent/EP0063385A3/en
Application granted granted Critical
Publication of EP0063385B1 publication Critical patent/EP0063385B1/en
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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
    • 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
    • F01L1/265—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 peculiar to machines or engines with three or more intake 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
    • 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
    • F02F1/4221—Shape 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
    • 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
    • F01L2003/25—Valve configurations in relation to engine
    • F01L2003/251—Large number of valves, e.g. five or more
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02F2001/244—Arrangement of valve stems in cylinder heads
    • F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis

Definitions

  • the present invention relates to a four-cycle internal combustion engine.
  • a four-cycle internal combustion engine In order to improve the output performance of a four-cycle internal combustion engine at its high speed running range, it is a current practice to increase the number of intake valves and the number of exhaust valves for each cylinder of the internal combustion engine (GB-A-687528; US-A-1484376).
  • valve area the sum of the areas to be occupied in a combustion chamber by the intake and exhaust valves, i.e., the so-called "valve area" is increased to improve the charge and discharge efficiencies in accordance with the increases in the intake and exhaust valves and partly because the respective valves themselves can have their sizes and weights reduced so that their followabilities at a high speed can be improved.
  • a valve or valves may occasionally fail to be aligned with the corresponding cam shaft if the valve number is too large.
  • connecting means for connecting the misaligned valve or valves and its or their cam shaft is newly required for driving it or them, thus raising another problem that the construction of the valve driving system is complicated.
  • the invention as claimed has been conceived in order to remedy these drawbacks and solves the problem to provide a four-cycle engine which is enabled to have at least three intake valves without detrimental interferences in a combustion chamber and to drive the valves without rendering their driving system too complicated.
  • FIG. 1 illustrates one cylinder of a four-cycle engine, in which reference letters a and b indicate a cylinder and a cylinder head, respectively,and reference numerals 1 and 2 indicate an intake passage and an exhaust passage, respectively.
  • Numeral 3 indicates a combustion chamber which is formed below the afore-mentioned cylinder head b and into which the intake and exhaust passages 1 and 2 are opened.
  • Numeral 4 indicates a threaded hole for mounting an ignition plug, which is opened at the center position of the upper side of the afore-mentioned combustion chamber 3.
  • Numeral 5 indicates intake valves for opening and closing the afore-mentioned intake passage 1
  • numeral 6 indicates exhaust valves for opening and closing the exhaust passage 2.
  • Said intake and exhaust valves 5 and 6 have their respective lower ends facing the combustion chamber 3 to close the open ends of the intake passage 1 and the exhaust passage 2, respectively. Their respective intermediate portions are slidably supported in the wall of the cylinder head b through guides 5a and 6a.
  • Numerals 7 and 8 indicate lifters which are formed to extend from the upper ends of both the afore-mentioned valves 5 and 6 and through which both the valves 5 and 6 are connected to corresponding cam shafts 9 and 10 just there- above so that they are driven by said shafts 9 and 10.
  • Numerals 11 and 12 indicate springs which are made operative to bias the intake and exhaust valves 5 and 6 in their closing directions.
  • cam shafts 9 and 10 are rotatably supported above the cylinder head b through a cam carrier 13 and cam caps 14 and 15.
  • Numeral 16 indicates a cover which covers the afore-mentioned cam shafts 9 and 10 and the cam caps 14 and 15 and which is formed to extend from the upper end of the cam carrier 13.
  • the four-cycle engine thus constructed is equipped, so as to improve its output performance, with a plurality of intake valves 5 and a plurality of exhaust valves 6 for each cylinder, of which at least the intake valves 5 are three in number.
  • the afore-mentioned three intake valves 5 are arranged and constructed such that the intermediate one 5' faces the combustion chamber 3 at a smaller angle of inclination with respect to the axis 1 1 of the cylinder a than that of the remaining two outer intake valves 5, 5.
  • the afore-mentioned intake valves 5 are further arranged and constructed such that all their respective axes 1 2 extend through the center 0 1 of the cam shaft 9.
  • the afore-mentioned intake valves 5 are arranged, as shown in Figure 2, such that the intermediate one 5' is more offset to the outside with respect to the center line 1 3 , which divides the combustion chamber 3 into intake and exhaust portions, than the two intake valves 5, 5 at both sides, whereby the entirety of intake valves 5 does not interfere with one another.
  • the exhaust valves 6 provided are two in number and are arranged in the combustion chamber 3 on a plane 1 4 which is parallel to the afore-mentioned center line 1 3 . Moreover, the exhaust valves 6 are arranged to have their respective axes Is extending through the center 0 2 of the cam shaft 10 and are set with an equal angle of inclination a3 with respect to the axis 1 1 of the cylinder a.
  • the intake valves 5 provided in the embodiment thus far described are three in number, three exhaust valves 6 may be provided if they adopt the arrangement and construction similar to those of the intake valves 5.
  • the intermediate intake valve 5' is arranged to face the combustion chamber at a smaller angle ⁇ 1 of inclination with respect to the axis 1 1 of the cylinder than that of the remaining two intake valves 5 when the three intake valves are to be provided.
  • the intermediate intake valve 5' is more offset to the outside than the intake valves at both sides so that said three intake valves can be arranged in the combustion chamber without any interference among them.
  • said three intake valves are so arranged that their respective axes extend through the center 0 1 of their cam shaft 9.
  • the position relationship between the respective valves and their cam shaft is not changed from that of the prior art, and no new one is required as the means for connecting the respective valves with their cam shaft so that the valve during the system is not necessarily made complicated.

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)
EP19820103323 1981-04-22 1982-04-20 Four-cycle internal combustion engine Expired EP0063385B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6184381A JPS57176311A (en) 1981-04-22 1981-04-22 Four-cycle engine
JP61843/81 1981-04-22

Publications (3)

Publication Number Publication Date
EP0063385A2 EP0063385A2 (en) 1982-10-27
EP0063385A3 EP0063385A3 (en) 1983-04-13
EP0063385B1 true EP0063385B1 (en) 1985-07-31

Family

ID=13182766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103323 Expired EP0063385B1 (en) 1981-04-22 1982-04-20 Four-cycle internal combustion engine

Country Status (3)

Country Link
EP (1) EP0063385B1 (enrdf_load_stackoverflow)
JP (1) JPS57176311A (enrdf_load_stackoverflow)
DE (2) DE63385T1 (enrdf_load_stackoverflow)

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3469309D1 (en) * 1983-11-25 1988-03-17 Honda Motor Co Ltd Multiple-valved internal combustion engine
JPH0646004B2 (ja) * 1984-04-11 1994-06-15 ヤマハ発動機株式会社 内燃機関のカム軸保持構造
JPS60216014A (ja) * 1984-04-11 1985-10-29 Yamaha Motor Co Ltd 内燃機関の動弁装置
JPS60216012A (ja) * 1984-04-11 1985-10-29 Yamaha Motor Co Ltd 内燃機関の動弁装置
JPS615305U (ja) * 1984-06-18 1986-01-13 日産自動車株式会社 エンジンのシリンダヘツド
JPS6149113A (ja) * 1984-08-15 1986-03-11 Yamaha Motor Co Ltd 内燃機関の動弁装置
JPS6149121A (ja) * 1984-08-16 1986-03-11 Yamaha Motor Co Ltd ４行程内燃機関
US4858573A (en) * 1984-11-13 1989-08-22 Bothwell Peter W Internal combustion engines
GB2166799B (en) * 1984-11-13 1989-06-07 Bothwell P W Improvements relating to internal combustion engines
EP0262250B1 (de) * 1986-10-02 1990-03-14 Audi Ag Viertakt-Brennkraftmaschine
JPH0811929B2 (ja) * 1985-07-10 1996-02-07 アウデイ アクチエンゲゼルシヤフト ４サイクル内燃機関
ATE59215T1 (de) * 1986-05-14 1991-01-15 Bothwell P W Zylinderkopf fuer eine brennkraftmaschine.
JPS62286771A (ja) 1986-06-05 1987-12-12 Canon Inc プラテンロ−ラ−
US4905639A (en) * 1986-10-23 1990-03-06 Honda Giken Kogyo Kabushiki Kaisha Valve operating apparatus for an internal combustion engine
DE3708675A1 (de) * 1987-03-17 1988-09-29 Bayerische Motoren Werke Ag Ventilbetaetigungsanordnung fuer brennkraftmaschinen mit mehreren gleichartigen ventilen fuer jeden zylinder
JP2501649Y2 (ja) * 1987-12-21 1996-06-19 トヨタ自動車株式会社 内燃機関の動弁機構
JP2632888B2 (ja) * 1988-01-11 1997-07-23 ヤマハ発動機株式会社 多弁式エンジンの動弁装置
DE3831733A1 (de) * 1988-09-17 1990-03-22 Audi Ag Ventilgesteuerte hubkolben-brennkraftmaschine
US5016592A (en) * 1989-02-14 1991-05-21 Yamaha Hatsudoki Kabushika Kaisha Cylinder head and valve train arrangement for multiple valve engine
JP2799190B2 (ja) * 1989-07-14 1998-09-17 ヤマハ発動機株式会社 ４サイクルエンジンの動弁装置
DE3932293C1 (enrdf_load_stackoverflow) * 1989-09-28 1991-01-24 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
JP2576905B2 (ja) * 1989-11-17 1997-01-29 ヤマハ発動機株式会社 ４サイクル内燃機関の吸気装置
JPH02161168A (ja) * 1989-11-17 1990-06-21 Yamaha Motor Co Ltd ４サイクル内燃機関の吸気装置
JPH0759922B2 (ja) * 1989-11-17 1995-06-28 ヤマハ発動機株式会社 ４サイクル内燃機関の吸気装置
JP2599324B2 (ja) * 1991-10-24 1997-04-09 ヤマハ発動機株式会社 ４行程エンジンの動弁装置
JP2556419B2 (ja) * 1992-07-20 1996-11-20 ヤマハ発動機株式会社 ４サイクル内燃機関の吸気装置
JPH05215050A (ja) * 1992-07-20 1993-08-24 Yamaha Motor Co Ltd ４サイクル内燃機関の吸気装置
JPH05209581A (ja) * 1992-07-20 1993-08-20 Yamaha Motor Co Ltd ４サイクル内燃機関の吸気装置
DE4332198A1 (de) * 1993-09-22 1995-03-23 Porsche Ag Brennkraftmaschine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484376A (en) * 1921-02-21 1924-02-19 Lanzerotti-Spina Ettore Internal-combustion engine
GB242919A (en) * 1925-07-10 1925-11-19 Napier & Son Ltd Improvements in or relating to valve operating mechanism for internal combustion engines
GB296125A (en) * 1927-05-26 1928-08-27 Ettore Lanzerotti Spina Improvements in and relating to the valves and valve gear of internal combustion engines
NL78718C (enrdf_load_stackoverflow) * 1950-09-09
US3211137A (en) * 1963-03-12 1965-10-12 Love John Input valve systems for internal combustion engines

Also Published As

Publication number Publication date
JPH024765B2 (enrdf_load_stackoverflow) 1990-01-30
DE3265030D1 (en) 1985-09-05
JPS57176311A (en) 1982-10-29
EP0063385A2 (en) 1982-10-27
EP0063385A3 (en) 1983-04-13
DE63385T1 (de) 1983-04-14

Similar Documents

Publication Publication Date Title
EP0063385B1 (en) Four-cycle internal combustion engine
US4617896A (en) Internal combustion engine having three intake valves per cylinder
EP0187287B1 (en) Internal combustion engine
EP0165655B1 (en) Exhaust control system for two-cycle engine
EP0483109B1 (en) Camshaft arrangement for multiple valve engine
US4520775A (en) Intake system for multiple valve type engine
EP0413316A1 (en) Exhaust control valve system for parallel multi-cylinder two-cycle engine
EP0433728B1 (en) Cylinder head and valve arrangement for a multi-valve internal combustion engine
EP0320233B1 (en) Multivalve cylinder head
EP0541131B1 (en) Multi-valve internal combustion engine
US4452198A (en) Compact dual spark internal combustion engine
EP0595316B1 (en) Cylinder head and valve arrangement of a multi-valve internal combustion engine
EP0387089B1 (en) Intake system of plural cylinder internal combustion engine
JP3484498B2 (ja) ４サイクルエンジン
US4784091A (en) Cylinder head cover structure for a V-type engine
US5309880A (en) Dual induction system for internal combustion engine having splayed intake passages
EP0322572B1 (en) Valve actuating device for multi valve-type engine
EP0611883B1 (en) Internal combustion engine
US4615309A (en) Valve actuating mechanism for internal combustion engine
US6189503B1 (en) Porting arrangement for direct injected engine
EP0474217A2 (en) A valve operating mechanism for an internal combustion engine
JPH03271558A (ja) 多気筒ｖ型エンジンの吸気装置
JPH02271029A (ja) 複式ポペット弁の配列構造
KR100204772B1 (ko) 차량의 트리플 오버헤드 캠샤프트식 밸브장치
JPH0320563B2 (enrdf_load_stackoverflow)

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

ITCL It: translation for ep claims filed

Representative=s name: G.PETRAZ P.SSO GLP S.R.L.

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT

DET De: translation of patent claims
17P Request for examination filed

Effective date: 19831012

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3265030

Country of ref document: DE

Date of ref document: 19850905

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: AUDI AG

Effective date: 19860425

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930408

Year of fee payment: 12

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

Ref country code: GB

Payment date: 19930414

Year of fee payment: 12

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

Ref country code: DE

Payment date: 19930506

Year of fee payment: 12

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

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

Free format text: STATUS: PATENT REVOKED

R26 Opposition filed (corrected)

Opponent name: AUDI AG

Effective date: 19860425

27W Patent revoked

Effective date: 19931020

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 931020

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO