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JPH07122420B2 - Multi-cylinder 2-cycle engine - Google Patents

Multi-cylinder 2-cycle engine

Info

Publication number
JPH07122420B2
JPH07122420B2 JP2333287A JP2333287A JPH07122420B2 JP H07122420 B2 JPH07122420 B2 JP H07122420B2 JP 2333287 A JP2333287 A JP 2333287A JP 2333287 A JP2333287 A JP 2333287A JP H07122420 B2 JPH07122420 B2 JP H07122420B2
Authority
JP
Japan
Prior art keywords
engine
chamber
case
cylinder
engine case
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 - Lifetime
Application number
JP2333287A
Other languages
Japanese (ja)
Other versions
JPS63192954A (en
Inventor
六広 種山
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 JP2333287A priority Critical patent/JPH07122420B2/en
Publication of JPS63192954A publication Critical patent/JPS63192954A/en
Publication of JPH07122420B2 publication Critical patent/JPH07122420B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/116—Intake manifolds for engines with cylinders in V-arrangement or arranged oppositely relative to the main shaft
    • 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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/1019—Two-stroke engines; Reverse-flow scavenged or cross scavenged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10275—Means to avoid a change in direction of incoming fluid, e.g. all intake ducts diverging from plenum chamber at acute angles; Check valves; Flame arrestors for backfire prevention
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts
    • 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
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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

Landscapes

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

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は多気筒２サイクルエンジンに関する。The present invention relates to a multi-cylinder two-stroke engine.

（従来の技術及び発明が解決しようとする問題点） エンジンケースに複数のシリンダを設け、クランク室を
各シリンダに対応させて複数の室に分割し、この分割さ
れた各室と気化器とをエンジンケースに形成した吸気通
路で連通した多気筒２サイクルエンジンに於いては、ブ
リージングにより出てくる気体中に混入した油を分離す
る気液分離室いわゆるブリーザチャンバーを設けたもの
がある。斯かるエンジンでは従来よりエンジンケース外
側にハウジングを取付ける等してブリーザチャンバーを
形成しており、このためエンジンの部品点数の増加及び
エンジンの大型化を招く等の不具合があった。(Problems to be Solved by Conventional Techniques and Inventions) A plurality of cylinders are provided in an engine case, a crank chamber is divided into a plurality of chambers corresponding to the respective cylinders, and each of the divided chambers and a carburetor are separated. Some multi-cylinder two-cycle engines, which communicate with each other through an intake passage formed in an engine case, are provided with a gas-liquid separation chamber, a so-called breather chamber, for separating oil mixed in the gas discharged by breathing. In such an engine, conventionally, a breather chamber is formed by attaching a housing to the outside of the engine case, which causes problems such as an increase in the number of parts of the engine and an increase in the size of the engine.

本発明は斯かる従来の不具合に鑑み成されたものであ
り、その目的とする処はブリーザチャンバーを設けつつ
も部品点数の削減ならびにコンパクト化を図った多気筒
２サイクルエンジンを提供するにある。The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a multi-cylinder two-cycle engine in which the number of parts is reduced and the size is reduced while providing a breather chamber.

（問題点を解決するための手段） 前記問題点を達成するため本発明はエンジンケース（2
4）内にミッション室（31）とクランク室（30）とを形
成し、更に該エンジンケース（24）に複数のシリンダ
（33a），（33b）を設け、前記クランク室（30）を各シ
リンダ（33a），（33b）に対応する複数の室に分割し、
前記分割された各室と気化器（62）とをエンジンケース
（24）に形成した吸気通路（58a），（58b）で連通した
多気筒２サイクルエンジンに於いて、前記エンジンケー
ス（24）の前記吸気通路（58a），（58b）間にブリーザ
チャンバー（65）を形成したことを特徴とする。(Means for Solving Problems) In order to achieve the above problems, the present invention provides an engine case (2
4) forming a mission chamber (31) and a crank chamber (30) in the engine case (24), and further providing a plurality of cylinders (33a) and (33b) in the crank chamber (30). Divide into multiple chambers corresponding to (33a) and (33b),
In a multi-cylinder two-cycle engine in which the divided chambers and the carburetor (62) communicate with each other through intake passages (58a) and (58b) formed in the engine case (24), the engine case (24) A breather chamber (65) is formed between the intake passages (58a) and (58b).

（作用） 従来利用されていなかったエンジンケースの吸気通路間
にブリーザチャンバーを形成するので、多気筒２サイク
ルエンジンの部品点数の削減、並びにコンパクト化を図
ることができる。(Operation) Since the breather chamber is formed between the intake passages of the engine case that has not been used conventionally, it is possible to reduce the number of parts and the size of the multi-cylinder two-cycle engine.

（実施例） 以下に本説明の好適一実施例を添付図面に基づいて説明
する。(Embodiment) A preferred embodiment of the present description will be described below with reference to the accompanying drawings.

第１図は自動二輪車の側面図、第２図はエンジンの横断
面図、第３図は縦断面図である。FIG. 1 is a side view of a motorcycle, FIG. 2 is a transverse sectional view of an engine, and FIG. 3 is a longitudinal sectional view.

図面中、（１）は自動二輪車、（３）は前輪、（５）は
後輪、（７）は車体フレームで、左右のフロントフォー
ク（11），（11）上には前輪（３）を操舵するハンドル
（15）を設け、車体フレーム（７）後部には後輪（５）
を懸架するリヤフォーク（10）を上下に揺動自在に結合
する。In the drawings, (1) is a motorcycle, (3) is a front wheel, (5) is a rear wheel, (7) is a body frame, and the front wheel (3) is on the left and right front forks (11), (11). A steering wheel (15) is provided, and rear wheels (5) are provided at the rear of the body frame (7).
A rear fork (10) that suspends the is connected so that it can swing up and down.

前記車体フレーム（７）は、ヘッドチューブ（16）から
後方へ延出した上下二本より成るメインパイプ（18）
と、該メインパイプ（18）より垂下した左右のダウンチ
ューブ（20）と、ダウンチューブ（20）の下端より後方
へ略水平に延出するダウンチューブロア（21）、及びダ
ウンチューブロア（21）後端とメインパイプ（18）とを
連結するセンターチューブ（22）等から構成される。The body frame (7) is a main pipe (18) consisting of two upper and lower parts extending rearward from the head tube (16).
And left and right down tubes (20) depending from the main pipe (18), down tube lowers (21) extending substantially horizontally rearward from the lower ends of the down tubes (20), and down tube lowers (21). It is composed of a center tube (22) and the like connecting the rear end and the main pipe (18).

前記ダウンチューブロア（21）上にはエンジン（Ｅ）を
載置する。The engine (E) is mounted on the down tube lower (21).

該エンジン（Ｅ）はシリンダブロックが側面視でＶ字状
を成すＶ型２気筒２サイクルエンジンで該エンジン
（Ｅ）のエンジンケース（24）はアッパーケース（25）
とロアケース（26）とから構成される。アッパーケース
（25）とロアケース（26）間にはこれら（25），（26）
を接合した状態でクランク室（30）とミッション室（3
1）とが形成され、このクランク室（30）とミッション
室（31）とはアッパーケース（25）とロアケース（26）
に形成した隔壁（25a），（26a）により隔別されてい
る。The engine (E) is a V-type two-cylinder two-cycle engine in which the cylinder block has a V shape in side view, and the engine case (24) of the engine (E) is an upper case (25).
And lower case (26). These (25) and (26) are placed between the upper case (25) and the lower case (26).
The crank chamber (30) and the mission chamber (3
1) is formed, and the crank chamber (30) and the mission chamber (31) form an upper case (25) and a lower case (26).
They are separated by partition walls (25a) and (26a) formed in the above.

前記エンジンケース（24）は、クランク室（30）が前輪
（３）側に、ミッション室（31）が後輪（５）側になる
ように前後輪（３），（５）間で略水平に配置される。
（第２図中（ｌ）は走行路面に平行な線を示す） 又、エンジンケース（24）のクランク室（30）前部側に
は側面視Ｖ型を成す２つのシリンダブロック（33a），
（33b）を上下に形成し、これらシリンダブロック（33
a），（33b）内には夫々ピストン（35a），（35b）を摺
動自在に嵌挿し、該ピストン（35a），（35b）と各シリ
ンダブロック（33a），（33b）に固着したシリンダヘッ
ド（34a），（34b）との間に燃焼室（36a），（36b）を
形成する。更にこれらシリンダブロック（33a），（33
b）には夫々排気通路（37a），（37b）及び掃気通路（3
8a），（38b）を形成する。シリンダブロック（33a），
（33b）のうちシリンダブロック（33a）はロアケース
（26）側に、シリンダブロック（33b）はアッパーケー
ス（25）側に形成され、即ちエンジンケース（24）をア
ッパーケス（25）ロアケース（26）に分割する割り面
（Ｐ）は上下のシリンダブロック（33b），（33a）の中
間で地面と略平行に延出し、エンジンケース（24）は高
さの略中心部分で上下２つのケースに分割されることに
なる。The engine case (24) is substantially horizontal between the front and rear wheels (3) and (5) so that the crank chamber (30) is on the front wheel (3) side and the transmission chamber (31) is on the rear wheel (5) side. Is located in.
((1) in FIG. 2 shows a line parallel to the road surface) Two cylinder blocks (33a) forming a V-shape in side view are provided on the front side of the crankcase (30) of the engine case (24),
(33b) are formed vertically, and these cylinder blocks (33b
Cylinders in which pistons (35a) and (35b) are slidably inserted in a) and (33b), respectively, and which are fixed to the pistons (35a) and (35b) and the respective cylinder blocks (33a) and (33b). Combustion chambers (36a) and (36b) are formed between the heads (34a) and (34b). Furthermore, these cylinder blocks (33a), (33
In b), exhaust passages (37a), (37b) and scavenging passages (3
8a) and (38b) are formed. Cylinder block (33a),
Of the (33b), the cylinder block (33a) is formed on the lower case (26) side and the cylinder block (33b) is formed on the upper case (25) side, that is, the engine case (24) is formed on the upper case (25) and the lower case (26). The dividing surface (P) to be divided extends substantially parallel to the ground in the middle of the upper and lower cylinder blocks (33b) and (33a), and the engine case (24) is divided into two upper and lower cases at a substantially central portion of the height. Will be.

一方、前記クランク室（30）内にはクランク軸（40）
を、又前記ミッション室（31）内には歯車変速機構（4
1）を夫々配設する。クランク軸（40）はそのジャーナ
ル部がボールベアリング（41）により回転自在に支持さ
れ、又２つのクランクピン部が前述したピストン（35
a），（35b）に夫々コネクティングロッド（45a），（4
5b）を介して連結される。又変速歯車機構（41）はボー
ルベアリング（48），（49）を介して略平行に支持され
たメインシャフト（50）とカウンタシャフト（51）から
成り、これらシャフト（50），（51）にそれぞれスプラ
イン結合した歯車（55），（56）が噛合して変速段に対
応した歯車列を構成している。この歯車変速機構（41）
は周知のように、歯車（55），（56）を図外の変速レバ
ーの操作で各シャフト（50），（51）上を軸方向に摺動
し、変速レバーの操作に応じた歯車列を確立してエンジ
ン動力を変速する。On the other hand, the crankshaft (40) is in the crank chamber (30).
In the mission chamber (31), a gear transmission (4
1) is arranged respectively. The crank shaft (40) has a journal portion rotatably supported by a ball bearing (41), and two crank pin portions having the above-mentioned piston (35).
Connecting rods (45a), (4) to (a), (35b) respectively
Connected via 5b). The speed change gear mechanism (41) is composed of a main shaft (50) and a counter shaft (51) which are supported substantially in parallel via ball bearings (48) and (49). The spline-connected gears (55) and (56) are meshed with each other to form a gear train corresponding to the shift speed. This gear transmission (41)
As is well known, the gears (55) and (56) are axially slid on the shafts (50) and (51) by the operation of the gear shift lever (not shown), and the gear train corresponding to the operation of the gear shift lever. To establish engine speed.

本実施例では第５図に示すようにアッパーケース（25）
とロアケース（26）とをボルト（70），（71）にて締着
している。このうちボルト（70）はロアケース（26）の
隔壁（26a）に形成したボルト孔（26a1）およびアッパ
ーケース（25）の隔壁（25a）に形成したボルト孔（25a
1）に螺合し、一方ボルト（71）はロアケース（26）の
掃気通路（38a）内からアッパーケース（25）に向けて
形成したボルト孔（26a2）及びアッパーケース（25）に
形成したボルト孔（25a2）に螺合し、以上によりアッパ
ーケース（25）とロアケース（26）が締着される。In this embodiment, as shown in FIG. 5, the upper case (25)
And the lower case (26) are fastened with bolts (70) and (71). Among them, the bolt (70) is a bolt hole (26a1) formed in the partition wall (26a) of the lower case (26) and a bolt hole (25a) formed in the partition wall (25a) of the upper case (25).
1), while bolts (71) are bolt holes (26a2) formed in the scavenging passage (38a) of the lower case (26) toward the upper case (25) and bolts formed in the upper case (25). The upper case (25) and the lower case (26) are fastened by being screwed into the hole (25a2).

尚、（75）はミッション室（31）上壁に形成したオイル
通路である。Incidentally, (75) is an oil passage formed in the upper wall of the mission chamber (31).

ところでこのエンジン（Ｅ）は２気筒２サイクルエンジ
ンなので、クランク室（30）は各気筒に対応して２つの
室に分割されており、アッパーケース（２）５には第４
図に詳示すようにこの各室に対応して２つの吸気通路
（58a），（58b）が略平行に形成されている。この吸気
通路（58a），（58b）はその一端が前述の分割された室
に夫々開口し、他端側が吸気管（60a），（60b）を介し
て気化管（62）に連絡している。又、前記吸気通路（58
a），（58b）にはリードバルブ（63a），（63b）が設け
られ、（64a），（64b）はそのストッパーである。By the way, since this engine (E) is a 2-cylinder 2-cycle engine, the crank chamber (30) is divided into two chambers corresponding to each cylinder, and the upper case (2) 5 has a fourth chamber.
As shown in detail in the figure, two intake passages (58a) and (58b) are formed substantially parallel to each chamber. One end of each of the intake passages (58a) and (58b) opens into the aforementioned divided chamber, and the other end thereof communicates with the vaporization pipe (62) through the intake pipes (60a) and (60b). . In addition, the intake passage (58
Reed valves (63a) and (63b) are provided in a) and (58b), and (64a) and (64b) are stoppers thereof.

前記アッパーケース（25）の吸気通路（58a），（58b）
間にはミッション室（31）から排出される排気中に歯車
等により攪拌されて混入した油を分離するブリーザチャ
ンバー（65）を形成し、該チャンバー（65）はアッパー
ケース（25）、ロアケース（26）に形成したブリーザ通
路（66）によりミッション室（31）に連通し、またその
一方で、ドレン管（67）により大気に開放されている。Intake passages (58a), (58b) of the upper case (25)
A breather chamber (65) that separates oil that is agitated by gears and mixed in the exhaust gas discharged from the mission chamber (31) is formed between the chamber (65) and the upper case (25) and the lower case (25). The breather passageway (66) formed in 26) communicates with the mission chamber (31) and, on the other hand, is open to the atmosphere by the drain pipe (67).

以上に於いて、本実施例では排気中の油を分離するブリ
ーザチャンバー（65）をアッパーケース（25）の吸気通
路（58a），（58b）間、即ちエンジンケース（24）の従
来利用されていなかった部分に形成しており、このため
ブリーザチャンバー（65）を形成するにあたり、従来の
ようにエンジンケースの外側にハウジング等を設ける必
要がなくなり、エンジンの部品点数の削減並びにコンパ
クト化を図ることができる。As described above, in the present embodiment, the breather chamber (65) for separating oil in the exhaust is conventionally used between the intake passages (58a) and (58b) of the upper case (25), that is, the engine case (24). Since it is formed in the part that did not exist, it is not necessary to provide a housing etc. on the outside of the engine case as in the conventional case when forming the breather chamber (65), and it is possible to reduce the number of parts of the engine and make it compact. You can

（発明の効果） 以上に述べたように本発明によれば、従来利用されてい
なかったエンジンケースの吸気通路間にブリーザチャン
バーを形成するので、多気筒２サイクルエンジンの部品
点数を削減、並びにコンパクト化を図ることができる。As described above, according to the present invention, since the breather chamber is formed between the intake passages of the engine case which has not been conventionally used, the number of parts of the multi-cylinder two-cycle engine is reduced and the size is reduced. Can be realized.

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

第１図は自動二輪車の側面図、第２図はエンジンの横断
面図、第３図は同縦断面図、第４図は第２図のIV−IV線
断面図、第５図はアッパーケースとロアケースとの接合
状態を示す要部拡大断面図である。 尚、図面中、（24）はエンジンケース、（30）はクラン
ク室、（31）はミッション室、（33a），（33b）はシリ
ンダ、（58a），（58b）は吸気通路、（62）は気化管、
（65）はブリーザチャンバーである。Fig. 1 is a side view of a motorcycle, Fig. 2 is a transverse sectional view of an engine, Fig. 3 is a longitudinal sectional view of the same, Fig. 4 is a sectional view taken along line IV-IV of Fig. 2, and Fig. 5 is an upper case. FIG. 6 is an enlarged cross-sectional view of a main part showing a joined state of the lower case and the lower case. In the drawings, (24) is an engine case, (30) is a crank chamber, (31) is a mission chamber, (33a) and (33b) are cylinders, (58a) and (58b) are intake passages, and (62) Is a vaporization tube,
(65) is a breather chamber.

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】エンジンケース内にミッション室とクラン
ク室とを形成し、更に該エンジンケースに複数のシリン
ダを設け、前記クランク室を各シリンダに対応する複数
の室に分割し、前記分割された各室と気化器とをエンジ
ンケースに形成した吸気通路で連通した多気筒２サイク
ルエンジンに於いて、 前記エンジンケースの前記吸気通路間にブリーザチャン
バーを形成したことを特徴とする多気筒２サイクルエン
ジン。1. A transmission chamber and a crank chamber are formed in an engine case, a plurality of cylinders are provided in the engine case, and the crank chamber is divided into a plurality of chambers corresponding to the respective cylinders. A multi-cylinder two-cycle engine in which each chamber and a carburetor are connected by an intake passage formed in an engine case, wherein a breather chamber is formed between the intake passages of the engine case. .
JP2333287A 1987-02-03 1987-02-03 Multi-cylinder 2-cycle engine Expired - Lifetime JPH07122420B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2333287A JPH07122420B2 (en) 1987-02-03 1987-02-03 Multi-cylinder 2-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2333287A JPH07122420B2 (en) 1987-02-03 1987-02-03 Multi-cylinder 2-cycle engine

Publications (2)

Publication Number Publication Date
JPS63192954A JPS63192954A (en) 1988-08-10
JPH07122420B2 true JPH07122420B2 (en) 1995-12-25

Family

ID=12107627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2333287A Expired - Lifetime JPH07122420B2 (en) 1987-02-03 1987-02-03 Multi-cylinder 2-cycle engine

Country Status (1)

Country Link
JP (1) JPH07122420B2 (en)

Also Published As

Publication number Publication date
JPS63192954A (en) 1988-08-10

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