JPS5893914A - Overhead valve v-type 4-cycle internal-combustion engine - Google Patents

Overhead valve v-type 4-cycle internal-combustion engine

Info

Publication number
JPS5893914A
JPS5893914A JP18989581A JP18989581A JPS5893914A JP S5893914 A JPS5893914 A JP S5893914A JP 18989581 A JP18989581 A JP 18989581A JP 18989581 A JP18989581 A JP 18989581A JP S5893914 A JPS5893914 A JP S5893914A
Authority
JP
Japan
Prior art keywords
chamber
type
breather
engine
combustion engine
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.)
Pending
Application number
JP18989581A
Other languages
Japanese (ja)
Inventor
Akiyoshi Matsushita
松下　明由
Hiromitsu Adachi
浩光 安達
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
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP18989581A priority Critical patent/JPS5893914A/en
Publication of JPS5893914A publication Critical patent/JPS5893914A/en
Pending legal-status Critical Current

Links

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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • 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
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B2075/1804—Number of cylinders
    • F02B2075/1808—Number of cylinders two
    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/006—Camshaft or pushrod housings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To form a breather chamber simultaneously with work and assembly of an engine while improve a separating effect of oil, by providing the breather chamber communicated to a crank chamber between a cam chain chamber and cylinder space. CONSTITUTION:The captioned engine 1 is constituted in such a manner that two pistons 3 connected to a crankshaft 6 are arranged in a V-type while cam chains 20 in a valve rocker mechanism are linked between both sprockets 17, 19 in a cam chain chamber 21 formed from a crank casing 8 to a cylinder head cover 18. While breather chambers 22 are integrally formed between cylinders 2 and the cam chain chambers 21 to communicate the bottom parts of said chambers 22 to the casing 8 through holes 23. Then the engine is allowed to function in such a manner that air is circulated internally and externally of the chamber 22 in accordance with up-down motion of the piston 3.

Description

【発明の詳細な説明】 従来の４ザイクル内燃機関においては、クランク室内と
連通ずるブリーザ−室をクランクケース後方−１−側の
スペースに形成していた。DETAILED DESCRIPTION OF THE INVENTION In a conventional four cycle internal combustion engine, a breather chamber communicating with the crank chamber is formed in a space on the rear side of the crankcase.

前後にシリンダーを配置する■型内燃機関においては、
それらのスペースは狭いため、充分な効果を得るものが
得がたかった。In the ■ type internal combustion engine, which has cylinders located at the front and rear,
Because the space was so small, it was difficult to obtain a sufficient effect.

本発明はこのような不都合を解消した頭上弁式Ｖ型４ザ
イクル内燃機関の改良に係り、その目的とする処は、Ｖ
型内燃機関のデツドスペスを利用し、構造面ｔｌｉでコ
ンパクトな内燃機関を・供する点ｔごある。The present invention relates to an improvement of an overhead valve type V-type 4-cycle internal combustion engine that eliminates such inconveniences, and its purpose is to
Utilizing the dead space of a type internal combustion engine, it is possible to provide a compact internal combustion engine in terms of structure.

以下図面に図示された本発明の一実施例について説明す
る。An embodiment of the present invention illustrated in the drawings will be described below.

１は頭上弁式Ｖ　）１１１２４サイクル２気筒エンジン
で、同エンジン１においては、シリング−２にピストン
３がそれぞれ摺動自在に嵌装され、同ピストン３にピス
トンピン４を介してコネクティングロッド５の小径部が
枢着され、同コネクティングロッド５の大径部はクラン
クシャフト６のクランクビン７に枢着されている。1 is an overhead valve type V) 11124 cycle two-cylinder engine, in which a piston 3 is slidably fitted in each cylinder 2, and a connecting rod 5 is connected to the piston 3 via a piston pin 4. The small diameter portion of the connecting rod 5 is pivotally connected, and the large diameter portion of the connecting rod 5 is pivotally connected to the crank pin 7 of the crankshaft 6.

また前記クランクシャフト６はクランクケーシング８に
回転自在に枢支され、同クランクシャフト６の一端に交
流発電機９のロータＩｏが一体に嵌着されると＼もに同
クランクシャフト６の他端にクランクギヤ１１が一体に
嵌着されている。The crankshaft 6 is rotatably supported by the crank casing 8, and when the rotor Io of the alternator 9 is integrally fitted to one end of the crankshaft 6, the other end of the crankshaft 6 A crank gear 11 is fitted integrally.

さらに前記クランクギヤ１１に多板摩擦クラッチ１２ノ
フライホイルギヤ１３が噛合され、同クラッチＩ２の出
力側にトランスミッション（図示されず）のメインシャ
フト１４が連結されている。Further, a multi-disc friction clutch 12 and a flywheel gear 13 are engaged with the crank gear 11, and a main shaft 14 of a transmission (not shown) is connected to the output side of the clutch I2.

さらにまた前記シリンダー２にシリンノグーヘッド１５
が装着され、同シリンダーヘッド】５には、図示されな
い動弁機構が設けられ、同動弁機構のカム軸１６にスプ
ロケット１７が嵌着され、同動弁機構　。Furthermore, the cylinder head 15 is attached to the cylinder 2.
The cylinder head 5 is provided with a valve mechanism (not shown), and a sprocket 17 is fitted onto a camshaft 16 of the same valve mechanism.

を密閉するようにシリンダーヘッドカバ−１８カ着脱自
在に装着されている。18 cylinder head covers are removably attached to seal the cylinder head.

また前記動弁機構のスプロケット１７とクランクシャフ
ト６のスプロケット１９にカムチェーン２０が架渡され
うるように、クランクケーシング８とシリンダーヘッド
カバー１８内とに亘りカムチェーン室２１が形成されて
いる。Further, a cam chain chamber 21 is formed between the crank casing 8 and the cylinder head cover 18 so that a cam chain 20 can be spanned between the sprocket 17 of the valve mechanism and the sprocket 19 of the crankshaft 6.

しかして前記シリンダー２とカムチェーン室２１との間
にブリーザ−室２２が一体に形成され、同ブリーザ−室
２２の下部は孔乙を介してクランクケーシング８に連通
されており、ピストン３の昇降に伴なうクランクケース
８内の圧力変動に伴なって前記ブリーザ−室２２に空気
が出入するようになっている。A breather chamber 22 is integrally formed between the cylinder 2 and the cam chain chamber 21, and the lower part of the breather chamber 22 communicates with the crank casing 8 through a hole A, so that the piston 3 can move up and down. Air flows in and out of the breather chamber 22 as the pressure inside the crankcase 8 changes.

図示の実施例は前記したように構成されているため、シ
リンダー２とクランクケース８とシリンターヘット１５
を鋳造する際に、カムチェーン室２１およびブリーザ−
室２２をも同時に形成されるため、ブリーザ−室２２を
別途加］−１組ｔてる必要がなく、組立性および生産性
を向上させることができる。Since the illustrated embodiment is configured as described above, the cylinder 2, the crankcase 8, and the cylinder head 15 are
When casting the cam chain chamber 21 and breather
Since the chamber 22 is also formed at the same time, there is no need to separately add one set of breather chambers 22, and assembly efficiency and productivity can be improved.

またシリンダー２とカムチェーン室２１の中間にブリー
ザ−室２２を形成した＼め、エンジン１をコンパクトに
まとめ、小型化することができる。Furthermore, since the breather chamber 22 is formed between the cylinder 2 and the cam chain chamber 21, the engine 1 can be made compact and downsized.

さらにブリーザ−室２２の容積を充分に取ることができ
る。Furthermore, the breather chamber 22 can have a sufficient volume.

さらにまたブリーザ−室２２の高さをシリンダーヘッド
１５に略一致する程度に取ることができるため、同ブリ
ーザ−室２２内でオイルを充分に分離することができる
。Furthermore, since the height of the breather chamber 22 can be set to approximately match the height of the cylinder head 15, oil can be sufficiently separated within the breather chamber 22.

本発明は前記したように頭上弁式Ｖ型４サイク／ｌ／　
内燃機関において、カムヂエーン室トシリンター室との
空間にブリーザ−室を形成した＼め、ブリーザ−室を別
個に加工、組立てることなく、エンジンの加工、組立と
同時にブリーザ−室を形成することができ、生産性を向
上させると＼もにコスト低減を図ることができる。As described above, the present invention is an overhead valve type V type 4 cycle/l/
In an internal combustion engine, the breather chamber is formed in the space between the cam engine chamber and the cylinder chamber, so the breather chamber can be formed at the same time as the engine is machined and assembled, without having to process and assemble the breather chamber separately. Improving productivity can also reduce costs.

さらに本発明においては、前記ブリーザ−室をシリンダ
ーの高さと同程度の高さに設定することができるので、
同ブリーザ−室のオイル分離効果を高くすることができ
る。Furthermore, in the present invention, since the breather chamber can be set at a height comparable to the height of the cylinder,
The oil separation effect of the breather chamber can be enhanced.

以上本発明を図面に図示された実施例について詳細に説
明したが、本発明はこのような実施例に限定されること
なく、本発明の精神を逸脱しない範囲内で必要に応じて
適宜自由に設計の改変を施しうるものである。Although the present invention has been described above in detail with reference to the embodiments illustrated in the drawings, the present invention is not limited to such embodiments, and can be freely modified as necessary without departing from the spirit of the present invention. The design can be modified.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明に係る頭上弁式Ｖ型４サイクル内燃機関
の一実施例を図示した側面図、第２図は第１図の■−■
線に沿って裁断した縦断面図である。 ■・・・頭上弁式Ｖ型４サイクル２気筒エンジン、２・
・・シリンダー、３・・・ピストン、４・・・ピストン
ピン、５・・・コネクティングロッド、６・・・クラン
クシャフト、７・・・クランクピン、８・・・クランク
ケーシング、９・・・交流発電機、１０・・・ロータ、
１１・・・クランクシャフト、１２・・・多板摩擦クラ
ッチ、１３・・・フライホイルギヤ、１４・・・メイン
シャフト、１５・・・シリンダーヘッド、１６・・・カ
ム軸、１７・・・スプロケット、１８・・・シリンダー
ヘッドカバー、１９・・・スプロケット、２０・・・カ
ムチェーン、２１・・・カムチェーン室、２２・・・ブ
リーザ−室、２３・・・孔。 代理人　弁理士　江　　原　　　望 外１名FIG. 1 is a side view illustrating an embodiment of an overhead valve type V-type four-stroke internal combustion engine according to the present invention, and FIG.
It is a longitudinal cross-sectional view cut along a line. ■...Overhead valve type V-type 4-stroke 2-cylinder engine, 2.
... Cylinder, 3... Piston, 4... Piston pin, 5... Connecting rod, 6... Crankshaft, 7... Crank pin, 8... Crank casing, 9... AC Generator, 10...rotor,
11... Crankshaft, 12... Multi-disc friction clutch, 13... Flywheel gear, 14... Main shaft, 15... Cylinder head, 16... Camshaft, 17... Sprocket , 18... Cylinder head cover, 19... Sprocket, 20... Cam chain, 21... Cam chain chamber, 22... Breather chamber, 23... Hole. Agent: Patent attorney Nozomi Ehara (1 person)

Claims (1)

【特許請求の範囲】[Claims] ｊ７ｒｉ−１−弁穴■型４ザイクル内燃機関において、
カムチェーン室とシリング−との空間にブリーザ−室を
形成し、同ブリーザ−室をクランク室に連通したことを
特徴とする頭上弁式■型４サイクル内燃機関。j7ri-1-valve hole■ In a type 4-cycle internal combustion engine,
An overhead valve type ■4-stroke internal combustion engine characterized by forming a breather chamber in the space between the cam chain chamber and the sling, and communicating the breather chamber with the crank chamber.
JP18989581A 1981-11-28 1981-11-28 Overhead valve v-type 4-cycle internal-combustion engine Pending JPS5893914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18989581A JPS5893914A (en) 1981-11-28 1981-11-28 Overhead valve v-type 4-cycle internal-combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18989581A JPS5893914A (en) 1981-11-28 1981-11-28 Overhead valve v-type 4-cycle internal-combustion engine

Publications (1)

Publication Number Publication Date
JPS5893914A true JPS5893914A (en) 1983-06-03

Family

ID=16248979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18989581A Pending JPS5893914A (en) 1981-11-28 1981-11-28 Overhead valve v-type 4-cycle internal-combustion engine

Country Status (1)

Country Link
JP (1) JPS5893914A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6334438B1 (en) 1999-01-28 2002-01-01 Honda Giken Kogyo Kabushiki Kaisha Overhead valve type internal combustion engine
EP1881174A1 (en) * 2006-07-20 2008-01-23 Honda Motor Co., Ltd Internal combustion engine
JP2009264346A (en) * 2008-04-30 2009-11-12 Kawasaki Heavy Ind Ltd Engine
JP2016070130A (en) * 2014-09-29 2016-05-09 本田技研工業株式会社 Breather chamber of internal combustion engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183510A (en) * 1981-05-08 1982-11-11 Yamaha Motor Co Ltd Breather of motorcycle engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183510A (en) * 1981-05-08 1982-11-11 Yamaha Motor Co Ltd Breather of motorcycle engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6334438B1 (en) 1999-01-28 2002-01-01 Honda Giken Kogyo Kabushiki Kaisha Overhead valve type internal combustion engine
EP1881174A1 (en) * 2006-07-20 2008-01-23 Honda Motor Co., Ltd Internal combustion engine
JP2009264346A (en) * 2008-04-30 2009-11-12 Kawasaki Heavy Ind Ltd Engine
JP2016070130A (en) * 2014-09-29 2016-05-09 本田技研工業株式会社 Breather chamber of internal combustion engine

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