JPS63289226A - Overhead camshaft type v-engine - Google Patents

Overhead camshaft type v-engine

Info

Publication number
JPS63289226A
JPS63289226A JP664088A JP664088A JPS63289226A JP S63289226 A JPS63289226 A JP S63289226A JP 664088 A JP664088 A JP 664088A JP 664088 A JP664088 A JP 664088A JP S63289226 A JPS63289226 A JP S63289226A
Authority
JP
Japan
Prior art keywords
output shaft
cylinder
engine
crankshaft
shaft
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
JP664088A
Other languages
Japanese (ja)
Other versions
JPH0345218B2 (en
Inventor
Sadahide Suzuki
鈴木 貞英
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
Application filed by Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP664088A priority Critical patent/JPS63289226A/en
Publication of JPS63289226A publication Critical patent/JPS63289226A/en
Publication of JPH0345218B2 publication Critical patent/JPH0345218B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/16Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18Multi-cylinder engines
    • F02B75/22Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/02Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

PURPOSE:To make an engine compact by respectively arranging a clutch outside opposite to an output shaft in the side wall of a crank case and as well a motor outside of the output shaft side and also displacing a rear cylinder and speed change gears to the output shaft side with respect to a front cylinder. CONSTITUTION:An engine 1 has respective front and rear cylinders which longitudinally incline in V-shape. In a crank case 4, a crankshaft 5, a main shaft and a countershaft of which speed change gears are composed, a damper shaft and an output shaft 9 are rotatably supported respectively and as well a clutch 10 is attached to the one end portion of the main shaft 6. In this case, the clutch 10 is arranged outside opposite to the output shaft 6. In the side wall of the crank case 4 which supports the bearing 40 of a crankshaft 5 and as well a motor 14 is arranged outside of the output shaft 9 side respectively. The rear cylinder 3 and the speed change gears 6, 7 are displaced to the output shaft 9 side with respect to the front cylinder. By this arrangement, the rear cylinder 3 is inclined to the rear sufficiently so as to make the engine compact.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動二輪車などに搭載される頭上カム軸式V
型エンジンに関するものである。
Detailed Description of the Invention (Industrial Application Field) The present invention is directed to an overhead camshaft type V mounted on a motorcycle or the like.
It concerns type engines.

(発明の背景) 自動二輪車などの車輌においてV型エンジンを搭載する
場合には、エンジンをできるだけ小型にする必要があり
、車体レイアウト上の要請により後気筒を後方へ大さく
傾けることが求められる場合が有る。ここにこの種のエ
ンジンではクランク軸の後方に変速機を配設し、クラン
ク軸の回転をエンジンの一側に配鐙したクラッチを介し
て変速機に伝えるようにしている。しかしこのクラッチ
が大径であり、クランク軸の小歯車に後方から噛合する
クラッチと一体の減速大歯車も大径となるので、後気筒
の後傾角度がこの減速大歯車やクラッチにより制限され
、エンジンの小型化が制限されるという問題があった。
(Background of the Invention) When a V-type engine is installed in a vehicle such as a motorcycle, it is necessary to make the engine as small as possible, and the rear cylinder may be required to be tilted significantly rearward due to vehicle body layout requirements. There is. In this type of engine, a transmission is arranged behind the crankshaft, and the rotation of the crankshaft is transmitted to the transmission via a clutch arranged on one side of the engine. However, this clutch has a large diameter, and the large reduction gear that is integrated with the clutch that engages the small gear of the crankshaft from the rear also has a large diameter, so the backward tilt angle of the rear cylinder is limited by this large reduction gear and clutch. There was a problem in that miniaturization of the engine was restricted.

一方シャフトドライブ式とした場合には、クランクケー
ス後部の一側から、後方へ向って出力軸が突出するため
、クランクケースのこの出力軸側の側面が大きく外側へ
膨らむことになる。このためエンジン形状の左右バラン
スが悪くなり、車輌への#5載性が悪くなるという問題
もあった。
On the other hand, in the case of a shaft drive type, since the output shaft protrudes rearward from one side of the rear part of the crankcase, the side surface of the crankcase on this side of the output shaft bulges outward. For this reason, there was also a problem that the left-right balance of the engine shape was poor, and the #5 mounting ability on a vehicle was poor.

(発明の目的) 本発明はこのような事情に鑑みなされたものであり、後
気筒が大径のクラッチや減速大歯車の制限を受けずに大
きく後傾させたレイアウトの採用を可能にすると共にエ
ンジンの小型化を可能にし、またこのクラッチと反対側
に位置する発電機と出力軸の突部間の空間を有効に利用
してエンジン形状の左右バランスを良好にし、車輌への
搭載性を向上されることができる頭上カム軸式V型エン
ジンを提供することを目的とする。
(Objective of the Invention) The present invention was made in view of the above circumstances, and makes it possible to adopt a layout in which the rear cylinder is tilted significantly backward without being restricted by a large diameter clutch or large reduction gear. This makes it possible to downsize the engine, and also makes effective use of the space between the generator and the protrusion on the output shaft located on the opposite side of the clutch, improving the left-right balance of the engine shape and improving installation in vehicles. An object of the present invention is to provide an overhead camshaft type V-type engine that can be used in various ways.

(発明の構成) 本発明によればこの目的は、クランクケース上に前・後
気筒が略V型に配置され、クランク軸の回転がその後方
に位置する変速機を介してクランクケース後端の一側か
ら後方に突出する出力軸に伝達され、シャフトドライブ
式の車両に用いられる頭上カム軸式V型エンジンにおい
て、前記クランク軸の軸受を保持するクランクケース側
壁の前記出力軸と反対側の外側にクラッチを、前記出力
軸側の外側に発電機をそれぞれ配設する一方、前記後気
筒と変速機とを前記前気筒に対して前記出力軸側へ変位
させたことを特徴とする頭上カム軸式V型エンジンによ
り達成される。
(Structure of the Invention) According to the present invention, this object is achieved by disposing the front and rear cylinders in a substantially V-shape on the crankcase, and rotating the crankshaft through the transmission located at the rear of the crankcase. In an overhead camshaft type V-type engine used in a shaft drive vehicle, the transmission is transmitted to an output shaft that protrudes rearward from one side, and the outside of the crankcase side wall opposite to the output shaft holds the bearing of the crankshaft. an overhead camshaft, characterized in that a clutch is disposed on the outside of the output shaft, and a generator is disposed on the outside of the output shaft, and the rear cylinder and the transmission are displaced toward the output shaft with respect to the front cylinder. Achieved by a V-type engine.

すなわち変速機を発電機と出力軸との間の空間側へ突出
させてこの空間を有効利用すると共に、後気筒をこの出
力軸側へ偏位させて後気筒とクラッチや減速大歯車との
干渉を避けつつ後気筒と変速機を覆うクランクケースと
のつながりをスムースにし、もってエンジンの左右バラ
ンスを良好にするものである。
In other words, the transmission is protruded into the space between the generator and the output shaft to make effective use of this space, and the rear cylinder is shifted toward the output shaft to prevent interference between the rear cylinder and the clutch and large reduction gear. The purpose is to create a smooth connection between the rear cylinder and the crankcase that covers the transmission, thereby improving the left-right balance of the engine.

(実施例) 第1図はこの発明に係る自動二輪車用エンジンの一部を
断面した側面図、第2図と第3図は第1図におけるII
 −II線断面図とm−m線断面図、第4図は第2図に
おける要部拡大断面図である。
(Example) Fig. 1 is a partially sectional side view of a motorcycle engine according to the present invention, and Figs. 2 and 3 are II in Fig. 1.
-II line sectional view, mm line sectional view, and FIG. 4 is an enlarged sectional view of the main part in FIG.

第1図において符号lはV型4サイクルエンジンであり
、このエンジン1は前後方向に傾斜する前気筒2および
後気筒3を備える。4は左右割りのクランクケースであ
り、このクランクケース4には第1〜3図に示すように
、クランク軸5、変速機を形成する主軸6と副軸7、ダ
ンパ軸8および出力軸9が軸支されている。主軸6の右
端部には公知の湿式多板式クラッチ10が取付けられ、
クランク軸5の回転はこのクラッチ10を介して主軸6
に伝えられ、この主軸6の回転はさらにこれら主軸6と
副軸7に設けられた変速歯車群11で変速されて副軸7
に伝えられる。副軸7の回転はダンパ軸8に設けたダン
パ12を介しダンパ軸8に伝えられ、さらに傘歯車13
を介して前後方向に軸支された出力軸9に伝えられる。
In FIG. 1, reference numeral 1 denotes a V-type four-stroke engine, and this engine 1 includes a front cylinder 2 and a rear cylinder 3 that are inclined in the longitudinal direction. 4 is a left-right split crankcase, and as shown in Figs. 1 to 3, this crankcase 4 includes a crankshaft 5, a main shaft 6 and a subshaft 7 forming a transmission, a damper shaft 8, and an output shaft 9. It is pivoted. A known wet multi-plate clutch 10 is attached to the right end of the main shaft 6.
The rotation of the crankshaft 5 is controlled by the main shaft 6 through this clutch 10.
The rotation of the main shaft 6 is further changed in speed by a transmission gear group 11 provided on the main shaft 6 and the subshaft 7, and the rotation of the main shaft 6 is transmitted to the subshaft 7.
can be conveyed to. The rotation of the subshaft 7 is transmitted to the damper shaft 8 via a damper 12 provided on the damper shaft 8, and is further transmitted to the bevel gear 13.
is transmitted to the output shaft 9 which is pivotally supported in the front-rear direction.

出力軸9の後端はクランクケース4の後方へ突出し、こ
の突出部分には不図示のプロペラ軸が自在継手(図示せ
ず)を介して接続される。このプロペラ軸により後輪(
図示せず)が駆動され、いわゆるシャフトドライブ式の
後輪駆動機構が形成されている。なおりランク軸5の左
端部には発電機14が配設されている。
The rear end of the output shaft 9 projects toward the rear of the crankcase 4, and a propeller shaft (not shown) is connected to this projecting portion via a universal joint (not shown). This propeller shaft connects the rear wheel (
(not shown) is driven, forming a so-called shaft drive type rear wheel drive mechanism. A generator 14 is disposed at the left end of the rank shaft 5.

前気筒2と後気筒3とは第2.3図により明らかなよう
に左右対称となるように構成されている。従って内気筒
2.3の対応部分にはそれぞれ係数a、bを付し、以下
前気筒2を中心にこれらの構成を説明する。
As is clear from FIG. 2.3, the front cylinder 2 and the rear cylinder 3 are configured to be symmetrical. Therefore, coefficients a and b are assigned to the corresponding parts of the inner cylinder 2.3, respectively, and the configuration of these will be described below, focusing on the front cylinder 2.

20a、21aは前気筒2のピストンとコンロッド、2
2a、23aはシリンダブロックとシリンダヘッドであ
る。内気筒2.3のコンロッド21a、21bの大端部
は共にクランクピン24に軸若されている。
20a and 21a are the piston and connecting rod of the front cylinder 2,
2a and 23a are a cylinder block and a cylinder head. The large ends of the connecting rods 21a and 21b of the inner cylinder 2.3 are both pivoted on a crank pin 24.

25aは頭上カム軸であって、シリンダヘッド23a内
に横向きに回転自在に軸支されている。
Reference numeral 25a denotes an overhead camshaft, which is rotatably supported laterally within the cylinder head 23a.

前気筒2の右側の側面にはシリンダヘッド23a、シリ
ンダブロック22a内を連通ずるようにチェーン通路2
6aが形成されている。27aは中間軸であり、この中
間軸27’aはクランク軸5と頭上カム軸25aとの間
にあってチェーン通路26aを横断するようにクランク
ケース4に取付けられ、特にチェーン通路26aを横断
する部分は、その中心線Bが第4図に示すように中間軸
27aの中心線Aに対して偏心した偏心部28aとなっ
ている。この中間軸27aの軸端には調整板29aが固
定されている。この調整板29aには弧状の長孔30a
が形成され、この長孔30aを通ってポル)31aがク
ランクケース4に螺入されている。すなわち中間軸27
aおよび調整板29aはポル)31aを緩めれば長孔3
0aの範囲内で回動可能となり、ポルト31aを締付け
ればその回動位置に固定される。このように中間軸27
aおよび調整板29aの回動位置決めを行なうことによ
り、後記中間歯車32aとカム駆動歯車43aとのバッ
クラッシュを調整することができる。
On the right side of the front cylinder 2, there is a cylinder head 23a, and a chain passage 2 communicating with the inside of the cylinder block 22a.
6a is formed. 27a is an intermediate shaft, and this intermediate shaft 27'a is located between the crankshaft 5 and the overhead camshaft 25a, and is attached to the crankcase 4 so as to cross the chain passage 26a. In particular, the portion that crosses the chain passage 26a is As shown in FIG. 4, the center line B is an eccentric portion 28a that is eccentric with respect to the center line A of the intermediate shaft 27a. An adjustment plate 29a is fixed to the shaft end of the intermediate shaft 27a. This adjusting plate 29a has an arc-shaped long hole 30a.
A hole 31a is screwed into the crankcase 4 through this elongated hole 30a. That is, the intermediate shaft 27
a and the adjustment plate 29a) If you loosen 31a, the elongated hole 3
It can be rotated within the range of 0a, and is fixed at that rotational position by tightening the port 31a. In this way, the intermediate shaft 27
By rotating and positioning the adjustment plate 29a and the adjustment plate 29a, backlash between the intermediate gear 32a and the cam drive gear 43a, which will be described later, can be adjusted.

32aは中間歯車であり、この中間歯車32aのシリン
ダ側にはスブロケッ)33aが一体に形成されている。
32a is an intermediate gear, and a subrocket 33a is integrally formed on the cylinder side of this intermediate gear 32a.

これら中間歯車32aおよびスプロケット33aは第4
図に示すようにカラー34aを介して中間軸27aの偏
心部28aに回転可能に軸支されている。
These intermediate gear 32a and sprocket 33a are the fourth
As shown in the figure, it is rotatably supported by an eccentric portion 28a of an intermediate shaft 27a via a collar 34a.

一部クランク軸5は軸受40.41によりそれぞれクラ
ンクケース4に軸支されているが(第2〜4図参照)、
このクランク軸5の右側の軸受41に隣接するようにエ
ンジン出力取出部とじての歯車42が、またこの歯車4
2の外側に隣接するようにカム駆動歯車43aがそれぞ
れクランク軸5に固定されている。すなわちこれらの歯
車42.43aは、第4図に示すようにクランク軸5へ
右方より嵌合され、さらにこのクランク軸5およびこれ
ら両歯車42.43aに形成されたキー溝44にキー4
5を挿入することによりクランク軸5に固定されている
。なお第4図において46はその一部がキー溝44内へ
折曲された座金、47は曲げ座金、48はナツトであり
、座金46.47はナツト48の緩み止めの作用を持っ
ている。エンジン出力取出部としての歯車42は前記ク
ラッチlOのケーシングにダンパ49を介して取付けら
れた減速大歯車としての歯車50(第2.3図参照)に
噛合し、またカム駆動歯車43aは前記中間歯車32a
に噛合している。なおりランク軸5の右端は第2図に示
すようにサイドカバ−51内面に設けた油室52内へ臨
み、この油室52からはクランク軸5内に形成された油
通路53(第4図参照)へ潤滑油を供給する。なお第2
図において54はシール部材であり、クランク軸5の右
端外周縁部と油室52開口縁部との間からの油の漏出を
防ぐものである。
Part of the crankshaft 5 is supported by the crankcase 4 by bearings 40 and 41 (see Figures 2 to 4),
A gear 42 serving as an engine output extraction portion is adjacent to the bearing 41 on the right side of the crankshaft 5;
A cam drive gear 43a is fixed to the crankshaft 5 so as to be adjacent to the outside of the crankshaft 2. That is, these gears 42 and 43a are fitted onto the crankshaft 5 from the right side as shown in FIG.
5, it is fixed to the crankshaft 5. In FIG. 4, 46 is a washer whose part is bent into the keyway 44, 47 is a bending washer, and 48 is a nut. Washers 46 and 47 have the function of preventing the nut 48 from loosening. A gear 42 serving as an engine output extraction portion meshes with a gear 50 (see Fig. 2.3) serving as a large reduction gear attached to the casing of the clutch lO via a damper 49, and a cam drive gear 43a is connected to the intermediate Gear 32a
It meshes with the The right end of the crankshaft 5 faces into an oil chamber 52 provided on the inner surface of the side cover 51 as shown in FIG. (see). Furthermore, the second
In the figure, reference numeral 54 denotes a sealing member that prevents oil from leaking from between the outer peripheral edge of the right end of the crankshaft 5 and the opening edge of the oil chamber 52.

一方クランク軸5の左端部には、発電機14の内側(軸
受40側)に前記前気筒2のカム駆動歯車43aに対応
する後気筒3のカム駆動歯車43bが設けられ、このカ
ム駆動歯車43bと軸受40との間にはオイルポンプ駆
動用スプロケット55が設けられている。カム駆動歯車
43bは後気筒3の中間歯車32bに噛合していること
は、前気筒2の場合と同様である。
On the other hand, at the left end of the crankshaft 5, a cam drive gear 43b for the rear cylinder 3 corresponding to the cam drive gear 43a for the front cylinder 2 is provided inside the generator 14 (on the bearing 40 side). An oil pump driving sprocket 55 is provided between the bearing 40 and the bearing 40 . As in the case of the front cylinder 2, the cam drive gear 43b meshes with the intermediate gear 32b of the rear cylinder 3.

前記中間歯車32aと一体に形成されたスプロケッ)3
3aは前記チェーン通路26aの下部に位若し、また前
記頭上カム軸25aの右端にはチェーン通路26aの上
部に位置するスプロケット60aが固定され、これらス
プロケット33a、60aにはタイミングチェーン61
aが掛は回されている。すなわちこれらスプロケット3
3a、60aおよびタイミングチェーン61aにより、
中間歯車の回転を頭上カム軸25aに伝える回転伝動機
構が形成され、この回転伝動機構と中間歯車32aとで
前気筒2のカム駆動系が形成される。
Sprocket) 3 integrally formed with the intermediate gear 32a
3a is located at the lower part of the chain passage 26a, and a sprocket 60a located at the upper part of the chain passage 26a is fixed to the right end of the overhead camshaft 25a, and a timing chain 61 is fixed to these sprockets 33a, 60a.
A is being turned. In other words, these sprockets 3
3a, 60a and timing chain 61a,
A rotation transmission mechanism that transmits the rotation of the intermediate gear to the overhead camshaft 25a is formed, and a cam drive system for the front cylinder 2 is formed by this rotation transmission mechanism and the intermediate gear 32a.

第1図において65bは後気筒3におけるタイミングチ
ェーン61bの張り側に摺接するチェーンガイドであり
、その下端はクランクケース4にまたその上端はシリン
ダへラド23bに係止されている。66bは同じくタイ
ミングチェーン61bの緩み側に摺接するチェーンガイ
ドであり、その下端部はクランクケース4に挿入固定さ
れた保持部材67bに回動可能に保持されている。この
チェーンガイド66bはシリンダブロック22bに固定
されたチェーンテンショナ68bにより弾発的にタイミ
ングチェーン61b側へ押圧されている。なお前気筒2
のチェーンガイドやチェーンテンショナも前記後気筒3
と左右対称となるように構成され、スプロケット33b
、60b、タイミングチェーン61bからなる回転伝動
機構と、中間歯車32bとで後気筒3のカム駆動系が形
成される。。また第1図において70a、70bは各気
筒2.3の対向する面に開口する吸気口、71a、71
bはこれら吸気ロア0a、70b(7)反対の面に開口
する排気口である。図中72a、72bは点火栓、73
a、73bは通風路であり、通風路73a、73bは各
気筒2.3のチェーン通路26a、26bとシリンダと
の間に位置するように各シリンダブロック22a、22
bに縦長に形成されている。
In FIG. 1, 65b is a chain guide that slides into contact with the tension side of the timing chain 61b in the rear cylinder 3, and its lower end is engaged with the crankcase 4, and its upper end is engaged with the cylinder rod 23b. Reference numeral 66b designates a chain guide that also slides on the loose side of the timing chain 61b, and its lower end is rotatably held by a holding member 67b inserted and fixed into the crankcase 4. This chain guide 66b is resiliently pressed toward the timing chain 61b by a chain tensioner 68b fixed to the cylinder block 22b. Furthermore, your cylinder 2
The chain guide and chain tensioner are also connected to the rear cylinder 3.
The sprocket 33b is configured to be symmetrical with the left and right sides.
, 60b, a rotational transmission mechanism including the timing chain 61b, and the intermediate gear 32b form a cam drive system for the rear cylinder 3. . Further, in FIG. 1, 70a and 70b are intake ports 71a and 71 that open on opposing surfaces of each cylinder 2.3.
b is an exhaust port that opens on the opposite surface of these intake lowers 0a, 70b (7). In the figure, 72a and 72b are spark plugs, 73
a, 73b are ventilation passages, and the ventilation passages 73a, 73b are arranged in each cylinder block 22a, 22 so as to be located between the chain passages 26a, 26b of each cylinder 2.3 and the cylinders.
It is formed vertically in b.

いまクランク軸5が第1図で時計方向に回転すれば、カ
ム駆動歯車32a、32bと共にスブロケッ)33a、
33bが反時計方向に回転する。
Now, if the crankshaft 5 rotates clockwise in FIG.
33b rotates counterclockwise.

従って頭上カム軸25a、25bもタイミングチェーン
61a、61bにより反時計方向に回転する。この結果
不図示の動弁機構が作動し、吸気弁および排気弁(共に
図示せず)がクランク軸5の回転に同期して開閉される
。なおりランク軸5の回転はカム駆動歯車43a、43
bと中間歯車32a、32bの間、およびスプロケット
33a、33bとスプロケット60a、60bの間にお
いて2段階に減速され、頭上カム軸25a。
Therefore, the overhead camshafts 25a, 25b are also rotated counterclockwise by the timing chains 61a, 61b. As a result, a valve mechanism (not shown) is activated, and an intake valve and an exhaust valve (both not shown) are opened and closed in synchronization with the rotation of the crankshaft 5. The rotation of the rank shaft 5 is controlled by the cam drive gears 43a, 43.
The overhead camshaft 25a is decelerated in two stages between B and intermediate gears 32a, 32b, and between sprockets 33a, 33b and sprockets 60a, 60b.

25bはクランク軸5の1/2の速度で回転する。25b rotates at 1/2 the speed of the crankshaft 5.

(発明の効果) 本発明は以上のように、後気筒を前気筒に対して大径の
クラッチや減速大歯車から遠い位置に偏位させると共に
、クラッチと反対側に配設された発電機と出力軸との間
の空間に変速機の一側端を突出させたから、後気筒を大
きく後傾させるレイアウトを採用する際に大径のクラッ
チや減速大歯車が障害になることがなく、また発電機と
出力軸との間の空間に変速機を突出させてこの空間を有
効利用でき、特にこの空間に突出した変速機を覆うクラ
ンクケースは同方向に偏位した後気筒に滑らかに連続す
ることになり、エンジンの左右バランスが良好でエンジ
ンの小型化が図れるなど種々の効果が得られる。
(Effects of the Invention) As described above, the present invention deviates the rear cylinder to a position far from the large-diameter clutch and the large reduction gear with respect to the front cylinder, and also deviates the rear cylinder to a position far from the large-diameter clutch and the large reduction gear. Because one end of the transmission protrudes into the space between it and the output shaft, a large-diameter clutch or large reduction gear does not become an obstacle when adopting a layout in which the rear cylinder is tilted significantly backwards, and it is also possible to generate electricity. By protruding the transmission into the space between the engine and the output shaft, this space can be used effectively, and in particular, the crankcase that covers the transmission that protrudes into this space can be smoothly connected to the rear cylinder offset in the same direction. This results in various effects such as good left-right balance of the engine and the ability to downsize the engine.

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

第1図はこの発明に係る自動二輪車用エンジンの一部を
断面した側面図、第2図と第3図は第1図における■−
■線断面図と■−■線断面図、第4図は第2図における
要部拡大断面図である。 l・・・エンジン、2・・・前気筒、 3・・・後気筒、4・・・クランクケース、5・・・ク
ランク軸、 6・・・変速機の主軸、 7・・・変速機の副軸、 9・・・出力軸、10・・・クラッチ、14・・・発電
機、40.41・・・軸受、50・・・減速大歯車。
Fig. 1 is a partially sectional side view of a motorcycle engine according to the present invention, and Figs. 2 and 3 are - - in Fig. 1.
4 is an enlarged sectional view of the main part in FIG. 2. l...engine, 2...front cylinder, 3...rear cylinder, 4...crank case, 5...crankshaft, 6...main shaft of transmission, 7...transmission Subshaft, 9... Output shaft, 10... Clutch, 14... Generator, 40.41... Bearing, 50... Reduction large gear.

Claims (1)

【特許請求の範囲】 クランクケース上に前・後気筒が略V型に配置され、ク
ランク軸の回転がその後方に位置する変速機を介してク
ランクケース後端の一側から後方に突出する出力軸に伝
達され、シャフトドライブ式の車両に用いられる頭上カ
ム軸式V型エンジンにおいて、 前記クランク軸の軸受を保持するクランクケース側壁の
前記出力軸と反対側の外側にクラッチを、前記出力軸側
の外側に発電機をそれぞれ配設する一方、前記後気筒と
変速機とを前記前気筒に対して前記出力軸側へ変位させ
たことを特徴とする頭上カム軸式V型エンジン。
[Scope of Claims] Front and rear cylinders are arranged in a substantially V-shape on the crankcase, and the rotation of the crankshaft is transmitted through a transmission located behind the crankcase to produce an output that projects rearward from one side of the rear end of the crankcase. In an overhead camshaft type V-type engine used in a shaft drive type vehicle, a clutch is provided on the outside of the side wall of the crankcase that holds the bearing of the crankshaft, on the opposite side from the output shaft. An overhead camshaft type V-type engine, characterized in that a generator is disposed on the outside of the engine, and the rear cylinder and the transmission are displaced toward the output shaft side with respect to the front cylinder.
JP664088A 1988-01-15 1988-01-15 Overhead camshaft type v-engine Granted JPS63289226A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP664088A JPS63289226A (en) 1988-01-15 1988-01-15 Overhead camshaft type v-engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP664088A JPS63289226A (en) 1988-01-15 1988-01-15 Overhead camshaft type v-engine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2296880A Division JPS56118508A (en) 1980-02-26 1980-02-26 Driver for over head cam shaft of engine

Publications (2)

Publication Number Publication Date
JPS63289226A true JPS63289226A (en) 1988-11-25
JPH0345218B2 JPH0345218B2 (en) 1991-07-10

Family

ID=11643965

Family Applications (1)

Application Number Title Priority Date Filing Date
JP664088A Granted JPS63289226A (en) 1988-01-15 1988-01-15 Overhead camshaft type v-engine

Country Status (1)

Country Link
JP (1) JPS63289226A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007100539A (en) * 2005-09-30 2007-04-19 Honda Motor Co Ltd Starter of internal combustion engine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347404U (en) * 1976-09-27 1978-04-21
JPS5359132A (en) * 1976-11-09 1978-05-27 Kubota Ltd Over-head valve v-shaped diesel engine
JPS5450719A (en) * 1977-09-29 1979-04-20 Yamaha Motor Co Ltd Multi-cylinder v-type engine for motorcycle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5386805A (en) * 1976-12-29 1978-07-31 Sanyo Kokusaku Pulp Co Treating of pulp waste liquor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5347404U (en) * 1976-09-27 1978-04-21
JPS5359132A (en) * 1976-11-09 1978-05-27 Kubota Ltd Over-head valve v-shaped diesel engine
JPS5450719A (en) * 1977-09-29 1979-04-20 Yamaha Motor Co Ltd Multi-cylinder v-type engine for motorcycle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007100539A (en) * 2005-09-30 2007-04-19 Honda Motor Co Ltd Starter of internal combustion engine

Also Published As

Publication number Publication date
JPH0345218B2 (en) 1991-07-10

Similar Documents

Publication Publication Date Title
US7216615B2 (en) Engine device for motorcycles
JP2000145471A (en) Structure for arranging engine oil control valve
JPH1089147A (en) Cylinder head structure of internal combustion engine
US7438031B2 (en) Layout structure of hydraulic control valve for valve train in internal combustion engine
JPH0988625A (en) Internal combustion engine
US5605077A (en) Camshaft supporting structure in an engine
JP2000220435A (en) Overhead valve type internal combustion engine
JP2000337164A (en) Engine device
US6848411B2 (en) Secondary balancer of vertical engine of outboard motor
US7469611B2 (en) Vehicular power unit with improved transmission structure
JPS63289226A (en) Overhead camshaft type v-engine
JPH0232445B2 (en)
US7168405B2 (en) Camshaft drive mechanism
US7503299B2 (en) Twincam engine and motorcycle comprising the same
US5165294A (en) Engine, transmission assembly for vehicle
JP3327322B2 (en) 4 cycle engine with variable valve timing device
JP2000154732A (en) Damper pulley structure for engine
JPS63289225A (en) Overhead camshaft type v-engine
JP3272245B2 (en) Chain cover structure of 4-cycle engine
JP3309700B2 (en) 4 cycle engine
JP3730065B2 (en) OHC V-type 2-cylinder engine
JPH0158323B2 (en)
JP2516488Y2 (en) DOHC engine silida head
JPH1077903A (en) Cylinder head fastening structure of engine unit for vehicle
JPH1077861A (en) Engine unit for vehicle