JPH03107535A - V-type engine - Google Patents

V-type engine

Info

Publication number
JPH03107535A
JPH03107535A JP24229489A JP24229489A JPH03107535A JP H03107535 A JPH03107535 A JP H03107535A JP 24229489 A JP24229489 A JP 24229489A JP 24229489 A JP24229489 A JP 24229489A JP H03107535 A JPH03107535 A JP H03107535A
Authority
JP
Japan
Prior art keywords
crankshaft
cylinder
transmission
engine
distance
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
JP24229489A
Other languages
Japanese (ja)
Inventor
Atsushi Sawa
厚志 沢
Yoshiyuki Sekiya
義之 関谷
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 JP24229489A priority Critical patent/JPH03107535A/en
Publication of JPH03107535A publication Critical patent/JPH03107535A/en
Pending 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

Landscapes

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

Abstract

PURPOSE:To shorten the distance between a pair of cylinders and the length of an engine by setting the distance between a crankshaft to one cylinder deck face shorter than that between the crankshaft and the other cylinder deck face on the transmission side. CONSTITUTION:Cylinders 6, 7 of the same dimension are provided into a V-form at the upper crankcase 3 of a V-type engine 1. A transmission 11 driven by a crankshaft 10 is disposed at one side of the crankshaft 10. The cylinder 6 close to the transmission 11 is disposed in such a way as to avoid the interference of the transmission 11 to gears, whereas the other cylinder 7 is disposed in proximity to the crankshaft 10. The respective distances A, a from the crankshaft 10 to the deck face 7a and lower end 7b of the cylinder 7 are therefore set to be shorter than the respective distances B, b from the crankshaft 10 to the deck face 6a and lower end 6b of the cylinder 6.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、クランクケース上方にシリンダをV型に配置
し、クランク軸の側方に変速機を配置したエンジンに関
する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine in which cylinders are arranged in a V-shape above a crankcase and a transmission is arranged on the side of the crankshaft.

(従来の技術) この種のエンジンは、高出力にすると一対のシリンダヘ
ッド間の距離が長くなり、自動二輪車の原動機のように
V型のシリンダを前後の位置関係に配置する場合は、設
置空間の大きさに限度があるため、各部のレイアウトに
種々の配慮をして設置空間内に納めるようにしている。
(Prior art) In this type of engine, when the output is high, the distance between the pair of cylinder heads becomes long, and when the V-shaped cylinders are arranged in a front-back position like the prime mover of a motorcycle, the installation space is Since there is a limit to the size of the system, various considerations have been made to the layout of each part to fit it within the installation space.

例えば特開昭57−210127においては、変速機を
下方に下げることにより車体のフレーム内に納まる構造
にしている。すなわち、このエンジンにおいては、クラ
ンクケースを上下に二分割して分割面に設けた軸受でク
ランク軸を支承するが、変速機の主軸やカウンタ軸は、
下クランクケース内に設けた軸受で支承する構造となっ
ている。
For example, in Japanese Patent Application Laid-Open No. 57-210127, the transmission is lowered to fit within the frame of the vehicle body. In other words, in this engine, the crankcase is divided into upper and lower halves, and the crankshaft is supported by a bearing provided on the divided surface, but the main shaft and countershaft of the transmission are
The structure is such that it is supported by bearings installed inside the lower crankcase.

(発明が解決しようとする課題) 前記の従来技術においては、変速機の位置が下方になる
ため、変速機中で最大の直径を有する主クラッチの下端
位置も下がることになり、該下端位置が必要な地上高さ
をもつように設計すると、エンジン全体の高さが大幅に
高くなり、その上、前後のシリンダヘッド間の間隔も長
いため所定のスペース内での配置が極めて困難になる。
(Problems to be Solved by the Invention) In the above-mentioned prior art, since the position of the transmission is lower, the lower end position of the main clutch, which has the largest diameter in the transmission, is also lowered, and the lower end position is lower. If designed to have the necessary ground clearance, the overall height of the engine would be significantly higher, and in addition, the distance between the front and rear cylinder heads would be long, making it extremely difficult to arrange it within a given space.

更に、変速機の軸受をクランクケースの合わせ面から離
れた下クランクケース内に設けているため、軸受保持部
分の構造が複雑になる不具合がある。
Furthermore, since the transmission bearing is provided in the lower crankcase away from the mating surface of the crankcase, there is a problem that the structure of the bearing holding portion becomes complicated.

したがって、本発明は、このような難点のないV型エン
ジンを得ることを課題とする。
Therefore, it is an object of the present invention to obtain a V-type engine that does not have such difficulties.

(課題を解決するための手段) 本発明の前記課題の解決手段は、クランクケースの上方
にシリンダをV型に連設し、クランク軸の一側方にクラ
ンク軸で駆動される変速機を配置したV型エンジンにお
いて、クランク軸から変速機側のシリンダのデツキ面ま
での距離に比して、クランク軸から他方のシリンダのデ
ツキ面までの距離を短くしたことを特徴とする。
(Means for Solving the Problems) The means for solving the problems of the present invention is to arrange cylinders in a V-shape above the crankcase, and arrange a transmission driven by the crankshaft on one side of the crankshaft. The V-type engine is characterized in that the distance from the crankshaft to the deck surface of the other cylinder is shorter than the distance from the crankshaft to the deck surface of the cylinder on the transmission side.

(作 用) 以上の手段を用いたから、一方のシリンダにおけるクラ
ンク軸からの距離を短縮した分だけV型の一対のシリン
ダ間の距離が短くなる。
(Function) Since the above means is used, the distance between the pair of V-shaped cylinders is shortened by the distance from the crankshaft in one cylinder.

(実施例) 以下、本発明の実施例を図面を参照して説明する。第1
図において、1は本発明のV型エンジン、2は下クラン
クケース、3は上クランクケースで、両ケースは分割面
4で分割されてボルト5で結合される。上クランクケー
ス3には、同一寸法のシリンダ6と7がV型に連設され
ており、そのデツキ面6a、 7aにシリンダヘッド8
゜9が結合され、更にその上部にヘッドカバー8a。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
In the figure, 1 is a V-type engine of the present invention, 2 is a lower crankcase, and 3 is an upper crankcase. Both cases are divided at a dividing surface 4 and connected with bolts 5. The upper crankcase 3 has cylinders 6 and 7 of the same size connected in a V-shape, and a cylinder head 8 is mounted on the deck surfaces 6a and 7a.
9 is combined, and furthermore, a head cover 8a is attached on top of it.

9aが取付けられている。シリンダ6.7の下端6b 
 7bはクランク軸10に対向している。
9a is installed. Lower end 6b of cylinder 6.7
7b faces the crankshaft 10.

クランクケースにおけるクランク軸10の一側には、変
速機11が設けられ、該クランク軸10と変速機11の
主クラッチ12と同心の主軸12aは、前記分割面4に
設けた軸受で支承され、主クラッチ12は、クランク軸
10によってギア1.3. 14を介して駆動される。
A transmission 11 is provided on one side of the crankshaft 10 in the crankcase, and a main shaft 12a of the crankshaft 10 and the main clutch 12 of the transmission 11, which is concentric, is supported by a bearing provided on the dividing surface 4, The main clutch 12 is connected by the crankshaft 10 to the gears 1.3. 14.

クランク軸10のクランクピン10aにはコンロッド1
6.17とピストン、18.19が順次連結され、該ピ
ストンによりクランク軸10が駆動される。なお図中2
0は図示せぬオイルポンプを駆動するオイルポンプドラ
イブスプロケット、21はオイルパン、2223は始動
用連動機構である。
The connecting rod 1 is attached to the crank pin 10a of the crankshaft 10.
6.17, a piston, and 18.19 are connected in sequence, and the crankshaft 10 is driven by the piston. Note that 2 in the figure
0 is an oil pump drive sprocket for driving an oil pump (not shown), 21 is an oil pan, and 2223 is a starting interlocking mechanism.

このエンジン1において変速機11に近いシリンダ6は
、該変速機11のギアとの干渉を避けるように位置付け
されている。これに対して他方のシリンダ7は、このよ
うな制約を受けないためクランク軸10に接近して設け
ることが可能であり、クランク軸10からシリンダ7の
デツキ面7aまでの距離A又は下端7bまでの距離aは
、前記シリンダ6のデツキ面6A又は下端6bまでの距
離B又はbよりも短かい。
In this engine 1, the cylinder 6 near the transmission 11 is positioned so as to avoid interference with the gears of the transmission 11. On the other hand, the other cylinder 7 is not subject to such restrictions and can be provided close to the crankshaft 10, and can be provided close to the crankshaft 10 by the distance A from the crankshaft 10 to the deck surface 7a of the cylinder 7 or to the lower end 7b. The distance a is shorter than the distance B or b to the deck surface 6A or lower end 6b of the cylinder 6.

これに伴ってコンロッド17は他のコンロッド16より
も短くされていて、ピストン18. 19は、クランク
ピン10aにより同一ストロークの往復運動をするが、
ピストン19は、クランク軸10により近い位置では往
復運動をする。また、これとは別に、コンロッド18.
17を同一の長さにしてピストン18.19のピストン
から上の寸法を異ならせてもよく、この場合はピストン
18に比してピストン19のビン上寸法を短くする。
Accordingly, the connecting rod 17 is made shorter than the other connecting rods 16, and the piston 18. 19 is reciprocated with the same stroke by the crank pin 10a,
The piston 19 reciprocates at a position closer to the crankshaft 10. Apart from this, connecting rod 18.
17 may have the same length and the pistons 18 and 19 may have different dimensions above the piston, in which case the piston 19 has a shorter dimension above the piston than the piston 18.

このようにすることにより、シリンダヘッド8.9間の
距離は短くなり、エンジンの長さLは必要最小限の長さ
になり、したがってシリンダ7を矢印Fで示す前方向き
として自動二輪車等に搭載するとき、車体フレーム内に
納まり易くなる。またクランク軸方向を車両の前後方向
と平行にして搭載するときもエンジンの横幅が小さいも
のとなるため搭載し易くなる。
By doing this, the distance between the cylinder heads 8 and 9 is shortened, and the length L of the engine is reduced to the minimum necessary length. Therefore, the cylinder 7 can be mounted in a motorcycle or the like with the cylinder facing forward as indicated by the arrow F. When doing so, it becomes easier to fit within the vehicle body frame. Furthermore, when the engine is mounted with the crankshaft direction parallel to the front-rear direction of the vehicle, the lateral width of the engine becomes smaller, making it easier to mount the engine.

(発明の効果) 本発明は、以上のように変速機と反対側に設置されるシ
リンダをクランク軸に近接して配置したから、エンジン
の長さを短くすることかできる効果を奏する。
(Effects of the Invention) The present invention has the effect that the length of the engine can be shortened because the cylinder installed on the opposite side of the transmission is disposed close to the crankshaft as described above.

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

第1図は本発明の実施例の縦断面図である。 6.7・・シリンダ     6a、 7a・・デツキ
面8.9・・・シリンダヘッド
FIG. 1 is a longitudinal sectional view of an embodiment of the invention. 6.7...Cylinder 6a, 7a...Deck surface 8.9...Cylinder head

Claims (1)

【特許請求の範囲】[Claims] クランクケースの上方にシリンダをV型に連設し、クラ
ンク軸の一側方にクランク軸で駆動される変速機を配置
したV型エンジンにおいて、クランク軸から変速機側の
シリンダのデッキ面までの距離に比して、クランク軸か
ら他方のシリンダのデッキ面までの距離を短くしたこと
を特徴とするV型エンジン。
In a V-type engine, in which cylinders are arranged in a V-shape above the crankcase and a transmission driven by the crankshaft is placed on one side of the crankshaft, the distance from the crankshaft to the deck surface of the cylinder on the transmission side is A V-type engine characterized by a short distance from the crankshaft to the deck surface of the other cylinder.
JP24229489A 1989-09-20 1989-09-20 V-type engine Pending JPH03107535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24229489A JPH03107535A (en) 1989-09-20 1989-09-20 V-type engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24229489A JPH03107535A (en) 1989-09-20 1989-09-20 V-type engine

Publications (1)

Publication Number Publication Date
JPH03107535A true JPH03107535A (en) 1991-05-07

Family

ID=17087099

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24229489A Pending JPH03107535A (en) 1989-09-20 1989-09-20 V-type engine

Country Status (1)

Country Link
JP (1) JPH03107535A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357401B1 (en) * 1999-11-04 2002-03-19 Honda Giken Kogyo Kabushiki Kaisha V-2 engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357401B1 (en) * 1999-11-04 2002-03-19 Honda Giken Kogyo Kabushiki Kaisha V-2 engine

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