EP1403496A1 - Luftgekühlte Brennkraftmaschine - Google Patents

Luftgekühlte Brennkraftmaschine Download PDF

Info

Publication number
EP1403496A1
EP1403496A1 EP20030103501 EP03103501A EP1403496A1 EP 1403496 A1 EP1403496 A1 EP 1403496A1 EP 20030103501 EP20030103501 EP 20030103501 EP 03103501 A EP03103501 A EP 03103501A EP 1403496 A1 EP1403496 A1 EP 1403496A1
Authority
EP
European Patent Office
Prior art keywords
cooling air
air passage
fore
internal combustion
aft direction
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
EP20030103501
Other languages
English (en)
French (fr)
Other versions
EP1403496B1 (de
Inventor
Takashi Kambe
Yuichi Tawarada
Tomoyasu Satoh
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.)
Honda Motor Co Ltd
Original Assignee
Honda 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=31973231&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1403496(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Publication of EP1403496A1 publication Critical patent/EP1403496A1/de
Application granted granted Critical
Publication of EP1403496B1 publication Critical patent/EP1403496B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/02—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00—Air cooling
    • F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00—Air cooling
    • F01P1/06—Arrangements for cooling other engine or machine parts
    • F01P1/10—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
    • 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
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • F02F1/30—Finned cylinder heads
    • F02F1/32—Finned cylinder heads the cylinder heads being of overhead valve type
    • 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

Definitions

  • the present invention relates to a cooling air passage for an air-cooled internal combustion engine mounted on a motorcycle and the like.
  • an air-cooled internal combustion engine in the related art having the following structure.
  • this internal combustion engine includes two exhaust ports and two exhaust valves corresponding thereto disposed side by side at the front portion of a cylinder head, and two intake ports and two intake valves corresponding thereto disposed also side by side at the rear portion thereof, an ignition plug disposed at the position surrounded by the aforementioned four valves, a laterally oriented camshaft disposed between a cylinder head and a cylinder head cover, a cooling air passage passing between the two exhaust valves and between the two intake valves, and then through the cylinder head in the fore-and-aft direction, and a laterally extending cooling air passage in communication with the aforementioned cooling air passage extending in the fore-and-aft direction (for example, see Patent Document 1).
  • an ignition plug mounting hole surrounding the body of the ignition plug with a clearance left therebetween is formed on the cylinder head, and the ignition plug mounting hole communicates with the aforementioned cooling air passage extending in the fore-and-aft direction.
  • part of incoming air is flown out upwardly of the internal combustion engine from the aforementioned ignition plug mounting hole, another part of air is flown out toward the side of the internal combustion engine from the laterally extending cooling air passage, and remaining part of air is flown out rearward from a rear opening of the cooling air passage extending in the fore-an-aft direction.
  • the cylinder head and the ignition plug is cooled.
  • JP-B-43050 (Fig.2, Fig. 3) is related to that prior art. Problems to be solved by the Invention In the related art, the effect of air-cooling in the cooling air passage is not sufficient. In addition, mounting and dismounting of the ignition plug is not easy.
  • the present invention is intended to improve air-cooling effect in the cooling air passage, to provide the ignition plug at such position that enables easy mounting and dismounting while enabling the effective air-cooling thereof.
  • the present invention contributes to solve the aforementioned problems, and the invention according to Claim 1 is, in the air-cooled internal combustion engine including a valve gear mechanism provided above a combustion chamber, and the cooling air passage extending in the fore-and-aft direction between the aforementioned combustion chamber and the aforementioned valve gear mechanism along the exhaust port and the intake port, there are provided the laterally extending cooling air passage in communication with the aforementioned cooling air passage extending in the fore-and-aft direction, the ignition plug provided in the laterally extending cooling air passage, and a cooling fin curved from the aforementioned cooling air passage extending in the fore-and-aft direction toward the aforementioned laterally extending cooling air passage.
  • the present invention is constructed as described above and the cooling fin is provided in the cooling air passage above the combustion chamber, the portion around the combustion chamber may be effectively cooled. Since the ignition plug is provided in the laterally extending cooling air passage, and the cooling fin is curved so as to guide a cooling air toward the ignition plug, overheating of the ignition plug may be prevented.
  • the invention according to Claim 2 is an air- cooled internal combustion engine as set forth in Claim 1, characterized in that the centreline of the aforementioned exhaust port is inclined with respect to the fore-and-aft direction of he internal combustion engine so as to broaden the front opening of the aforementioned cooling air passage extending in the fore-and-aft direction.
  • Fig. 1 is a vertical cross sectional view of a principal portion of an air-cooled internal combustion engine 1 according to one embodiment of he present invention, showing the upper portion of an OHC (overhead camshaft) single cylinder internal combustion engine.
  • an arrow F represents the front.
  • an outer shell of the principal portion of an internal combustion engine 1 includes a cylinder block 2, a cylinder head 3, and a cylinder head cover 4.
  • a combustion chamber 6 is formed on the bottom face side of the cylinder head 3.
  • the cylinder head 3 is formed with an exhaust port 7 and an intake port 9 communicating with the combustion chamber 6.
  • the exhaust port 7 is provided with an exhaust valve 8 at the inner end thereof for opening and closing the port.
  • An exhaust pipe, not shown, is continuing form the outer end at the exhaust port 7.
  • the intake port 9 is provided with an intake valve 10 at his inner end thereof for opening and closing the port.
  • a carburettor is connected to the outer end of he intake port 9.
  • the exhaust valve 8 is provided so that a shaft portion 8a thereof is inclined forwardly of the cylinder head 3, and a valve spring 11 for urging the exhaust valve 8 in the direction to close the exhaust valve 8 is attached on the upper projection of the shaft portion 8a.
  • the intake valve 10 is provided so that a shaft portion 10a thereof inclines rearward of the cylinder head 3, and a valve spring 12 for urging the intake valve 10 in the direction of closing is attached on the upper projection of the shaft portion 10a.
  • a valve gear chamber 13 is formed by the cylinder head 3 and the cylinder head cover 4, and a valve gear mechanism for opening and closing the aforementioned exhaust valve 8 and the intake valve 10 are stored therein.
  • An exhaust cam 15 for opening and closing the exhaust valve 8 and an intake cam 16 for opening and closing the intake valve 10 are formed on the camshaft 14.
  • a exhaust rocker arm 17 is pivotably supported above the exhaust valve 8 by a rocker exhaust arm shaft 18. One end thereof is in contact with the upper end of the shaft portion 8a of the exhaust valve via a tappet 19, and the other end thereof is in contact with the exhaust cam 15 via an exhaust roller 21 supported by a roller shaft 20.
  • An intake rocker arm 22 is pivotably supported by an intake rocker arm shaft 23 above the intake valve 10. One end thereof is in contact with the upper end of the shaft portion 10a of the intake valve via a tappet 24, and the other end is in contact with an intake cam 16 via an intake roller 26 supported by a roller shaft 25.
  • Fig. 2 is a lateral cross section of a principle portion of the aforementioned internal combustion engine 1.
  • the cylinder head 3 is attached with an ignition plug 27 on the right side thereof, and an electrode 27a at the distal end thereof projects into the combustion chamber 6.
  • One end of the camshaft 14 projects. into a chain chamber 28, on which a driven sprocket 29 is secured.
  • a drive sprocket (not shown) is secured on the crankshaft and a cam chain 30 is put around the aforementioned drive sprocket and the driven sprocket 29.
  • the camshaft 14 is rotated via the cam chain 30.
  • Fig. 3 is a cross sectional view taken along the line III-III in Fig. 2, showing a horizontal cross section of the cylinder head of the aforementioned internal combustion engine.
  • An arrow F indicates the front.
  • a cooling air passage extending in the fore-and-aft direction 32 passes through the cylinder head in the fore-and-aft direction is formed along a peripheral wall 28a of the chain chamber 28 on the side of the center of the cylinder head.
  • a space interposed between the peripheral wall 28a of the chain chamber and a peripheral wall 7a of the exhaust port is a front opening 33
  • a space interposed between the peripheral wall 28a of the chain chamber and a peripheral wall 9a of the intake port is a rear opening 34.
  • Formed on both sides of the ignition plug mounting portion 31 is a side opening 36.
  • the centerline A of the exhaust port 7 is inclined by an angle ⁇ with respect to the fore-and-aft direction B of the internal combustion engine toward the direction to broaden the front opening 33, so that the opening area of the front opening 33 is increased and thus a large quantity of air is introduced into the cooling air passage.
  • Three cooling fins are formed at the connecting portion between the cooling air passage 32 extending in the fore-and-aft direction and the laterally extending cooling air passage 35, and within the laterally extending cooling air passage 35 . They are a front fin 37, a middle fin 38, and a rear fin 39.
  • the shadowed portions of the middle fin 38 and the rear fin 39 in the figure are thicker and higher portions having increased thickness for reinforcement, and the top portions continue to the ceiling of the cooling air passage.
  • Fig. 4 is a perspective view of the aforementioned cooling fins when viewed from the rear obliquely upside.
  • the shadowed portions of the middle fin 38 and the rear fin 39 at the top thereof are cross sections of the top portions of the thicker and higher portions 38a and 39a continuing to the ceiling of the cooling air passage.
  • a cross sectional view showing three fins is shown in the laterally extending cooling air passage 35.
  • the aforementioned three fins provided in the cooling air passage are shown as they are viewed from the backside of the internal combustion engine.
  • the construction of the air-cooled internal combustion engine of the present invention is as described above. Against wind is generated when a motorcycle is traveling having the present internal combustion engine mounted thereon, and the against wind generated by traveling flows from the front opening 33 of the cooling air passage 32 extending in the fore-and-aft direction, part of which passed through the laterally extending cooling air passage 35 and then both side of the ignition plug 27, and flown out from the side opening 36 by the guiding action of the three fins. Another part thereof passes between three fins, and flown out from the rear opening 34 of the cooling air passage 32 extending in the fore-and-aft direction.
  • An outer wall surface of the cylinder head facing toward the cooling air passage 32 extending in the fore-and-aft direction and the laterally extending cooling air passage 35 is cooled by against wind generated by traveling during travel of the vehicle.
  • high temperatures in the combustion chamber 6 is conducted to the front, middle, and rear fins 37, 38, and 39 via a top outer shell 40 of the combustion chamber (Fig. 2), and cooled down by cooing air flowing in the fore-and-aft direction, and cooling air flowing in the lateral direction.
  • the ignition plug of the present invention is provided in the laterally extending cooling air passage in a slanted state, it can be dismounted easily from the side of the internal combustion engine, and thus maintenanceability is improved.
EP03103501A 2002-09-24 2003-09-22 Luftgekühlte Brennkraftmaschine Expired - Fee Related EP1403496B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002276924 2002-09-24
JP2002276924 2002-09-24

Publications (2)

Publication Number Publication Date
EP1403496A1 true EP1403496A1 (de) 2004-03-31
EP1403496B1 EP1403496B1 (de) 2007-11-14

Family

ID=31973231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03103501A Expired - Fee Related EP1403496B1 (de) 2002-09-24 2003-09-22 Luftgekühlte Brennkraftmaschine

Country Status (7)

Country Link
EP (1) EP1403496B1 (de)
KR (1) KR100569164B1 (de)
CN (1) CN100526631C (de)
BR (1) BR0304160A (de)
ES (1) ES2295513T3 (de)
MX (1) MXPA03008260A (de)
TW (1) TWI221877B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137499A1 (en) * 2005-06-23 2006-12-28 Honda Motor Co., Ltd. Air-cooled engine
EP2410164A3 (de) * 2010-07-19 2012-10-10 Kwang Yang Motor Co., Ltd. Struktur eines Zylinderkopfes eines Luftkühlungsmotor
EP2713033A1 (de) * 2012-10-01 2014-04-02 Yamaha Hatsudoki Kabushiki Kaisha Luftkühlungsverbrennungsmotor und Sattelfahrzeug damit
US10329994B2 (en) 2011-12-07 2019-06-25 Andreas Stihl Ag & Co. Kg Power tool
CN111749810A (zh) * 2019-03-29 2020-10-09 本田技研工业株式会社 内燃机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5479965B2 (ja) * 2010-03-23 2014-04-23 本田技研工業株式会社 車両用エンジンにおける点火プラグ冷却装置
TWI381093B (zh) * 2011-02-21 2013-01-01 Kwang Yang Motor Co Air Cooling Engine 's Cylinder Head Heat Dissipation
CN102312718B (zh) * 2011-03-14 2014-12-10 隆鑫通用动力股份有限公司 通用汽油机
CN102312750A (zh) * 2011-03-14 2012-01-11 隆鑫通用动力股份有限公司 汽油机风冷缸头及其汽油机
DE102011120465A1 (de) 2011-12-07 2013-06-13 Andreas Stihl Ag & Co. Kg Verbrennungsmotor mit einem Kraftstoffsystem
TWI454616B (zh) * 2012-08-22 2014-10-01 Kwang Yang Motor Co Engine heat dissipation of cylinder head
CN105201612B (zh) * 2014-06-10 2018-08-07 光阳工业股份有限公司 摩托车的引擎导风结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301641A (en) * 1991-11-06 1994-04-12 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
EP0845583A1 (de) * 1996-11-29 1998-06-03 Kawasaki Jukogyo Kabushiki Kaisha Ventilanordnung für Brennkraftmaschine mit obenliegenden Ventilen
US6244231B1 (en) * 1997-06-25 2001-06-12 Mitsubishi Heavy Industries, Ltd. Structure of overhead-valve internal combustion engine and manufacturing method for the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5301641A (en) * 1991-11-06 1994-04-12 Honda Giken Kogyo Kabushiki Kaisha Internal combustion engine
EP0845583A1 (de) * 1996-11-29 1998-06-03 Kawasaki Jukogyo Kabushiki Kaisha Ventilanordnung für Brennkraftmaschine mit obenliegenden Ventilen
US6244231B1 (en) * 1997-06-25 2001-06-12 Mitsubishi Heavy Industries, Ltd. Structure of overhead-valve internal combustion engine and manufacturing method for the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006137499A1 (en) * 2005-06-23 2006-12-28 Honda Motor Co., Ltd. Air-cooled engine
US7966987B2 (en) 2005-06-23 2011-06-28 Honda Motor Co., Ltd. Air-cooled engine
EP2410164A3 (de) * 2010-07-19 2012-10-10 Kwang Yang Motor Co., Ltd. Struktur eines Zylinderkopfes eines Luftkühlungsmotor
US10329994B2 (en) 2011-12-07 2019-06-25 Andreas Stihl Ag & Co. Kg Power tool
EP2713033A1 (de) * 2012-10-01 2014-04-02 Yamaha Hatsudoki Kabushiki Kaisha Luftkühlungsverbrennungsmotor und Sattelfahrzeug damit
CN111749810A (zh) * 2019-03-29 2020-10-09 本田技研工业株式会社 内燃机
CN111749810B (zh) * 2019-03-29 2022-02-25 本田技研工业株式会社 内燃机

Also Published As

Publication number Publication date
KR20040026599A (ko) 2004-03-31
CN100526631C (zh) 2009-08-12
EP1403496B1 (de) 2007-11-14
KR100569164B1 (ko) 2006-04-07
ES2295513T3 (es) 2008-04-16
TW200409859A (en) 2004-06-16
MXPA03008260A (es) 2004-09-03
CN1497158A (zh) 2004-05-19
TWI221877B (en) 2004-10-11
BR0304160A (pt) 2004-08-31

Similar Documents

Publication Publication Date Title
JP4244178B2 (ja) シリンダヘッドの冷却風通路構造
EP1403496B1 (de) Luftgekühlte Brennkraftmaschine
JP4550018B2 (ja) 車両用内燃機関
US20160273482A1 (en) Cooling water passage structure of internal combustion engine
JP5345405B2 (ja) シリンダヘッドの冷却構造
WO2017154782A1 (ja) 内燃機関の吸気構造
JPS6243050B2 (de)
JP4265764B2 (ja) 空冷式内燃機関
JP5668471B2 (ja) 空冷式エンジン
US4864981A (en) Overhead valve type engine
TWI551775B (zh) 強制氣冷式內燃機及具備該強制氣冷式內燃機之跨坐型車輛
CN103711560B (zh) 空冷式内燃机及具备该空冷式内燃机的跨骑型车辆
JP3372378B2 (ja) 燃料噴射弁を備えた火花点火式内燃機関の構造
JP2020101106A (ja) 鞍乗型車両の空冷エンジン
JPS61167107A (ja) 小型車輛の頭上カム型エンジン
JP5091754B2 (ja) シリンダブロック及びシリンダブロックを備えるエンジン
JPH09189259A (ja) 自動二輪車用内燃機関
JP2603801Y2 (ja) 車両用４サイクルエンジン
JP4795905B2 (ja) 水冷式エンジン
JP2001193553A (ja) エンジンの吸気装置
JP2001082245A (ja) 強制空冷式の頭上弁式内燃機関
JP2000320396A (ja) シリンダヘッド
JP2531563Y2 (ja) 吸い込み式冷却ファン付き頭上弁エンジンの冷却装置
JPH08296434A (ja) 空冷４サイクルエンジンのシリンダヘッド
JPH01132485A (ja) 自動二輪車の導風装置

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): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

17P Request for examination filed

Effective date: 20040512

AKX Designation fees paid

Designated state(s): ES FR TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): ES FR TR

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2295513

Country of ref document: ES

Kind code of ref document: T3

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

Effective date: 20080815

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

Ref country code: TR

Payment date: 20140820

Year of fee payment: 12

Ref country code: ES

Payment date: 20140812

Year of fee payment: 12

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

Ref country code: FR

Payment date: 20140906

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20160531

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: 20150930

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

Ref country code: ES

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

Effective date: 20150923

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

Ref country code: TR

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

Effective date: 20150922

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20180706