JPH02225192A - Air intake passage for motorcycle - Google Patents

Air intake passage for motorcycle

Info

Publication number
JPH02225192A
JPH02225192A JP1340258A JP34025889A JPH02225192A JP H02225192 A JPH02225192 A JP H02225192A JP 1340258 A JP1340258 A JP 1340258A JP 34025889 A JP34025889 A JP 34025889A JP H02225192 A JPH02225192 A JP H02225192A
Authority
JP
Japan
Prior art keywords
power unit
air cleaner
case
engine
motorcycle
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
JP1340258A
Other languages
Japanese (ja)
Other versions
JPH0657546B2 (en
Inventor
Yoshitaka Kitamura
喜多村 美孝
Koji Fuwa
不破 公二
Takushi Matto
卓志 松任
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 JP1340258A priority Critical patent/JPH0657546B2/en
Publication of JPH02225192A publication Critical patent/JPH02225192A/en
Publication of JPH0657546B2 publication Critical patent/JPH0657546B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02B75/02Engines 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
    • F02B2075/025Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Automatic Cycles, And Cycles In General (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

PURPOSE:To realize the reduction of the whole height of a power unit by arranging respectively and air cleaner case on the front side part of the power unit supported at a motor cycle body swingably, and a carburetter at the upper part of the power unit, and providing an air intake pipe connecting these along the upper wall of the power unit. CONSTITUTION:At a pedaled motorcycle mounted with a power unit 9 which is on the lower side of the shaft support portion 1a of the crank shaft 6 of a motorcycle body 1 and which extends backward, the power unit 9 is made to be a level vertically placed type 2-cycle engine arranged with a cylinder 9a at the front and a crank case 9b at the back. Also, a transmission case 9c is fitted on the side surface of the crank case 9b, and the rotation of a rear wheel 3 is made to be possible by welding under pressure to the rear wheel 13 a drive roller 12 on an output shaft shaft-supported at its rear space. In this instance, an air cleaner case 15 and a carburetter 17 are respectively arranged on the side surface of the cylinder portion 9a of the power unit 9 and at the upper part of the power unit 9, and an air intake pipe 16 connecting these is provided along the upper wall of the power unit 9.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、自動二輪車におけるエンジンの吸気通路に関
する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an intake passage for an engine in a motorcycle.

(従来の技術) 車体下部に揺動自在のパワーユニットを枢支した自動二
輪車においては、特開昭57−114789に見られる
ように車体のフレーム部材とパワーユニットとは上下方
向に離間して配置され、該パワーユニットの上方に気化
器及びエアクリーナが取付けられ、ている。
(Prior Art) In a motorcycle in which a swingable power unit is pivotally supported at the bottom of the vehicle body, the frame member of the vehicle body and the power unit are arranged vertically apart from each other, as seen in Japanese Patent Application Laid-Open No. 57-114789. A carburetor and an air cleaner are installed above the power unit.

(発明が解決しようとする課題) 前記のようにエンジン上部に気化器とエアクリーナケー
スを配設するものにあっては、これらの部品とりャフレ
ームの間に、パワーユニットの揺動ストローク分のスペ
ースを必要とし、特にエアクリーナケースは高張るもの
である上、該エアクリーナケースから気化器に至る接続
チューブもパワーユニットの上部に配置しなければなら
ないので、リヤフレーム下部のスペースが狭くなり、パ
ワーユニットの最低地上高を充分にとると燃料タンクそ
の他の部品の配置が困難にな、る不具合がある。本発明
は、この不具合を解決することを課題とする。
(Problem to be Solved by the Invention) As mentioned above, in the case where the carburetor and air cleaner case are disposed at the top of the engine, a space corresponding to the swing stroke of the power unit is required between these parts catcher frames. In particular, the air cleaner case is tall and the connecting tube from the air cleaner case to the carburetor must be placed above the power unit, which reduces the space under the rear frame and reduces the minimum ground clearance of the power unit. If there is not enough, it will be difficult to arrange the fuel tank and other parts. The present invention aims to solve this problem.

(課題を解決するための手段) 本発明における前記課題の解決手段は、シリンダ中心線
を前後方向に向けたエンジン部の後部にミッションケー
スを一体的に設けてパワーユニットを構成し、前輪と後
輪の間にエンジン部を位置させて該パワーユニットを車
体に揺動自在に枢支した自動二輪車において、エアクリ
ーナケースをパワーユニットにおけるミッションケース
の前方でかつエンジン部の側方に配置すると共に、前記
エンジン部に連なる気化器を、該パワーユニットの上部
に配置し、該エアクリーナケースから気化器を経てエン
ジンに至る吸気管を該エアクリーナケースの上方部から
パワーユニットの上壁に沿って配設したことを特徴とす
る。
(Means for Solving the Problems) Means for solving the above problems in the present invention is to configure a power unit by integrally providing a transmission case at the rear of an engine section with the cylinder center line directed in the longitudinal direction, and to In a motorcycle in which the power unit is swingably supported on the vehicle body with the engine section located between the air cleaner case and the transmission case of the power unit, the air cleaner case is disposed in front of the transmission case of the power unit and to the side of the engine section, and The continuous carburetor is arranged at the upper part of the power unit, and the intake pipe from the air cleaner case to the engine via the carburetor is arranged from the upper part of the air cleaner case along the upper wall of the power unit.

(作 用) 以上の構成であるから、エアクリーナケースはパワーユ
ニットと略同高になり、該パワーユニット上部には、気
化器とエアクリーナケースから該気化器を経てエンジン
に至る吸気管が配置されるだけであるから該上部にスペ
ース上の余裕が生じる。これにより、パワーユニットを
上方位置に配置できて最低地上高を充分な値とすること
ができる。
(Function) With the above configuration, the air cleaner case is approximately at the same height as the power unit, and the only thing that is placed above the power unit is the carburetor and the intake pipe that runs from the air cleaner case to the engine via the carburetor. Because of this, there is ample space at the top. Thereby, the power unit can be placed in an upper position and the minimum ground clearance can be set to a sufficient value.

(実施例) 次いで本発明を図示の実施例について説明する。図面で
(1)は前輪(2)と後輪(3)と中間部上側のサドル
(4)とを有する車体即ちフレームを示し、該車体(1
)は中間部下側に軸支部(la)と、該軸支部から後方
に延びる一対のフレーム部材からなるリヤフォーク(l
b)を有し、該軸支部(Ia)に軸支した両端のペダル
アーム(5) (5)を有するペダルクランク軸(6)
にチェーンスプロケット(7)を取付けて、該チェーン
スプロケット(Dの回転によりチェーン(8)を介して
後輪(3)を駆動し得るようにし、更に該車体(1)の
該クランク軸(6)の軸支部(Ia)下側に該両ペダル
アーム(5) (5)の配置間隙に位置して後方にのび
るパワーユニット(9)を搭載し、該パワーユニット〈
9)により該後輪(3)を駆動自在として全体としてペ
ダル付きの自動二輪車を構成した。
(Example) Next, the present invention will be explained with reference to the illustrated example. In the drawing, (1) shows a vehicle body or frame having a front wheel (2), a rear wheel (3), and a saddle (4) on the upper side of the middle part;
) is a rear fork (l) consisting of an axle support (la) on the lower side of the middle and a pair of frame members extending rearward from the axle support.
b) and a pedal crankshaft (6) having pedal arms (5) (5) at both ends pivoted on said pivot support (Ia);
A chain sprocket (7) is attached to the rear wheel (3) so that rotation of the chain sprocket (D) can drive the rear wheel (3) via the chain (8), and the crankshaft (6) of the vehicle body (1) A power unit (9) extending rearward is mounted on the lower side of the shaft support (Ia) of the pedal arm (5), and the power unit (9) extends rearwardly.
9), the rear wheel (3) is freely drivable, and a pedal-equipped motorcycle is constructed as a whole.

これを更に詳述するに、該パワーユニット(9)は、第
5図に示す如くシリンダ部(9a)を前方にしクランク
ケース(9b)を後方にして配置した水平縦置型の2サ
イクルエンジンを用い、該クランクケース(9b)の側
面に、プラネタリ減速ギアCOOを組込んだ後方にのび
るミッションケース(9c)を取付け、該ミッションケ
ース(9c)の後端部に、該クランクケース(9b)の
後方空間に突出する出力軸Q1を軸支し、これに後輪(
3)に対向する駆動ローラ(+21を取付けて成るもの
とし、該パワーユニット(9)を両ペダルアーム(5)
 (5)の配置間隙に収めて、これをその前部において
ペダルクランク軸(6)の軸支部(la)下側に並設し
たハンガボルトq3により上下方向に揺動自在に枢支し
、その後部をワイヤ操作の吊上げ機(+41により張持
して、該吊上げ機a4の操作によりパワーユニット(9
)を上方に揺動させたとき該駆動ローラ■が該後輪(3
)のタイヤ面に圧接して該パワーユニット(9)による
該後輪(3)の駆動が与えられるようにした。
To explain this in more detail, the power unit (9) uses a horizontally vertical two-stroke engine arranged with the cylinder part (9a) in the front and the crankcase (9b) in the rear, as shown in FIG. A rearwardly extending mission case (9c) incorporating a planetary reduction gear COO is attached to the side surface of the crankcase (9b), and a rear space of the crankcase (9b) is attached to the rear end of the mission case (9c). The output shaft Q1, which protrudes from the
The power unit (9) is connected to both pedal arms (5) by attaching a driving roller (+21) facing the
(5), and its front part is pivoted so as to be able to swing vertically by a hanger bolt q3 arranged in parallel to the lower side of the shaft support (la) of the pedal crankshaft (6), and its rear part is is held by a wire-operated lifting machine (+41), and the power unit (9
) when the rear wheel (3) is swung upward, the drive roller (■)
) so that the rear wheels (3) are driven by the power unit (9).

図面で(+51は該パワーユニット(9)のシリンダ部
(9a)の側面に取付けたエアクリーナケースを示し、
該側面とクランクケース(9b)の側面の段差で形成さ
れるスペースに取付けられる。エアクリーナケース(1
9は、シリンダ部(9a)と略等しい全高と前後長とこ
れらより小さい横幅をもち、該シリンダ部(9a)と同
様の最低地上高及び上面の最高位置をとるようにされて
いる。そして内部にはクリーナエレメント(15A)が
シリンダ部(9a)の側壁と平行に収容されており、該
エアクリーナケースaSの内側面下部にエア入口(15
a)とその上部の反対側にエア出口(15b)とを形成
して、該エア出口(15b)から接続チューブ(6)と
気化器(+71と吸気バイブ(8)とを介して該パワー
ユニット(9)のクランクケース(9b)に形成した吸
気ボートaSに至る吸気通路を構成し、該接続チューブ
(6)、吸気バイブ(8)等の吸気管をパワーユニット
の上面に沿って配設した。
In the drawing (+51 indicates an air cleaner case attached to the side of the cylinder part (9a) of the power unit (9),
It is attached to the space formed by the step between the side surface and the side surface of the crankcase (9b). Air cleaner case (1
9 has approximately the same overall height and longitudinal length as the cylinder part (9a), and a width smaller than these, and is designed to have the same minimum ground clearance and the highest position on the upper surface as the cylinder part (9a). A cleaner element (15A) is housed inside parallel to the side wall of the cylinder portion (9a), and an air inlet (15A) is provided at the lower part of the inner surface of the air cleaner case aS.
a) and an air outlet (15b) on the opposite side of the upper part thereof, and from the air outlet (15b), the power unit ( An intake passage leading to the intake boat aS formed in the crankcase (9b) of 9) was constructed, and intake pipes such as the connecting tube (6) and the intake vibe (8) were arranged along the upper surface of the power unit.

ここで本発明によれば、該気化器ODを、例えば該接続
チューブ(6)と該吸気パイプ(8)とで該パワーユニ
ット(9)に支持させてその中間部上側の前記軸支部(
la)から後方にのびる左右1対のフレーム部材として
のリヤフォーク(Ib) (lb)間に臨む位置に配置
し、該リヤフォーク(tb) (tb)間で該気化器0
7)を昇降自在とするもので、かくて該パワーユニット
(9)の最低地上高さを比較的高く設定しても、その上
方への揺動時該気化器Q7)は該リヤフォーク(lb)
 (lb)間で昇降して車体(1)との干渉を生ずるこ
とがない。
According to the present invention, the carburetor OD is supported by the power unit (9) by, for example, the connection tube (6) and the intake pipe (8), and the shaft support (
The carburetor 0 is placed in a position facing between the rear forks (lb), which are a pair of left and right frame members extending rearward from the rear forks (tb).
7) can be raised and lowered freely, so that even if the minimum ground height of the power unit (9) is set relatively high, when the power unit (9) swings upward, the carburetor Q7)
(1b) and will not cause interference with the vehicle body (1).

更に図示のものでは、該気化器(17)の下半部を該パ
ワーユニット(9)のクランクケース(9b)とミッシ
ョンケース(9C)との間の段差で形成される空間に収
納させ、該気化器(+7)の配置部を該リヤフォーク(
Ib) (lb)と該クランクケース(9b)とで上下
から囲うと共に、該ミッションケース(9c)と前記後
輪駆動用チェーン(8)で左右から囲って、該気化器(
+7)の4物に対するガード機能を向上させた。
Furthermore, in the illustrated example, the lower half of the carburetor (17) is housed in a space formed by a step between the crank case (9b) and the transmission case (9C) of the power unit (9), and the carburetor (17) is Place the device (+7) on the rear fork (
Ib) (lb) and the crankcase (9b) surround it from above and below, and the transmission case (9c) and the rear wheel drive chain (8) surround it from the left and right,
+7) Improved guard function against 4 objects.

図面で■はパワーユニット(9)のシリンダ部(9a)
にエアクリーナケース(151との間に介在させて取付
けた始動用吸気系即ちパイスタータ用のコントロールボ
ックスを示し、該エアクリーナケース09に形成したパ
イスタータ用の1対のエア出口(Is c)(15c)
の一方を該ボックス■の2次エア導入口(20a)と、
その他方を気化器07)のパイスタータ用混合気生成部
(17a)を介して該ボックスυの混合気導入口(17
b)とに接続すると共に、該ボックス■の導出口QOc
)を吸気バイブ(8)側に接続し、該ボックスυ内に収
容するバイメタルG!Od)に連動する制御弁G!Oe
)によりエンジン始動時の吸入混合気の濃度をエンジン
温度に応じて自動的に増減制御させるようにした。
In the drawing, ■ is the cylinder part (9a) of the power unit (9)
2 shows a control box for the starting air intake system, that is, the pie starter, which is installed between the air cleaner case 09 (151), and a pair of air outlets (Isc) (15c) for the pie starter formed in the air cleaner case 09. )
Connect one side to the secondary air inlet (20a) of the box (■),
The other side is connected to the air-fuel mixture inlet (17
b) and the outlet QOc of the box
) is connected to the intake vibe (8) side, and the bimetal G! is housed in the box υ. Control valve G linked to Od)! Oe
), the concentration of the intake air-fuel mixture when starting the engine is automatically controlled to increase or decrease according to the engine temperature.

図面でavはエンジンユニット(9)のシリンダ部(9
a)の下面に形成した排気ボート■に排気バイブa3を
介して連なるマフラ、@はりャフェンダ、■は燃料タン
ク、■はオイルタンク、■はミッションケース(9C)
の後部に設けたオイルポンプ、■■はミッションケース
(9C)内に設けたエンジン始動用のラチェット式ワン
ウェイクラッチとジェネレータ、■はチェーンカバを示
す。
In the drawing, av is the cylinder part (9) of the engine unit (9).
a) Muffler connected to the exhaust boat ■ formed on the bottom surface via the exhaust vibrator a3, @ Hariya fender, ■ is the fuel tank, ■ is the oil tank, ■ is the transmission case (9C)
The oil pump installed at the rear of the engine, ■■ indicates the ratchet type one-way clutch and generator for engine starting installed inside the transmission case (9C), and ■ indicates the chain cover.

この様に本発明によるときは、気化器をパワーユニット
の中間部上側に左右1対のリヤフォーク間に臨ませて配
置するもので、該気化器は該両リヤフォークと該パワー
ユニットとで上下から囲われて4物から有効に保護され
る。該リヤフォーク(lb)の上下幅が大きい場合又は
該リヤフォークに上下方向の補強板を取付けると、気化
器071に対する保護域も広くなる。
As described above, according to the present invention, the carburetor is arranged above the middle part of the power unit so as to face between the pair of left and right rear forks, and the carburetor is surrounded from above and below by both the rear forks and the power unit. and are effectively protected from four things. When the vertical width of the rear fork (lb) is large, or when a vertical reinforcing plate is attached to the rear fork, the protection area for the carburetor 071 becomes wider.

しかも、パワーユニット(9)の上部には、比較的小型
の気化器a〃と、接続チューブ(6)及び吸気パイプ(
8)よりなる吸気管が配設されるだけであるから、上方
の車体との間に余裕があり、パワーユニットをその最低
地上高を充分にとって配置することができる利点がある
Moreover, a relatively small carburetor a, a connecting tube (6) and an intake pipe (
8) Since only the intake pipe is disposed, there is ample space between the engine and the vehicle body above, and there is an advantage that the power unit can be placed with sufficient minimum ground clearance.

(発明の効果) 本発明は、以上のようにエアクリーナケースをパワーユ
ニットの前部側方に配置し、気化器をパワーユニットの
上部に配置してこれらを連通する吸気管をパワーユニッ
トの上壁に沿って配設したから、気化器を含めたパワー
ユニットの全高を小さくすることができ、これにより該
パワーユニットを車体に対して高位置に枢支して最低地
上高を充分な高さとすることができる効果を奏する。
(Effects of the Invention) As described above, the present invention arranges the air cleaner case at the front side of the power unit, arranges the carburetor at the top of the power unit, and connects the intake pipe along the upper wall of the power unit. Because of this arrangement, the total height of the power unit including the carburetor can be reduced, which has the effect of pivoting the power unit at a high position relative to the vehicle body and making the minimum ground clearance sufficiently high. play.

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

第1図は本発明装置を適用したエンジン付自転車の1例
の側面図、第2図はその要部の部分裁断側面図、第3図
はその要部の部分裁断正面図、第4図はその要部の部分
裁断平面図、第5図は第2図のV−v線截断平面図であ
る。
Fig. 1 is a side view of an example of a bicycle with an engine to which the device of the present invention is applied, Fig. 2 is a partially cutaway side view of its main parts, Fig. 3 is a partially cutaway front view of its main parts, and Fig. 4 is a side view of an example of a bicycle with an engine to which the present invention device is applied. FIG. 5 is a partially cutaway plan view of the main part thereof, and FIG. 5 is a plan view taken along the line V-V in FIG. 2.

Claims (1)

【特許請求の範囲】[Claims] シリンダ中心線を前後方向に向けたエンジン部の後部に
ミッションケースを一体的に設けてパワーユニットを構
成し、前輪と後輪の間にエンジン部を位置させて該パワ
ーユニットを車体に揺動自在に枢支した自動二輪車にお
いて、エアクリーナケースをパワーユニットにおけるミ
ッションケースの前方でかつエンジン部の側方に配置す
ると共に、前記エンジン部に連なる気化器を、該パワー
ユニットの上部に配置し、該エアクリーナケースから気
化器を経てエンジンに至る吸気管を、該エアクリーナケ
ースの上方部からパワーユニットの上壁に沿って配設し
たことを特徴とする、自動二輪車の吸気通路。
A power unit is constructed by integrally installing a transmission case at the rear of the engine section with the cylinder centerline facing in the longitudinal direction, and the engine section is positioned between the front wheels and the rear wheels, and the power unit is pivoted to the vehicle body. In the supported motorcycle, the air cleaner case is arranged in front of the transmission case of the power unit and to the side of the engine part, and the carburetor connected to the engine part is arranged above the power unit, and the carburetor is connected to the engine part from the air cleaner case. An intake passage for a motorcycle, characterized in that an intake pipe leading to the engine through the air cleaner case is disposed from an upper part of the air cleaner case along the upper wall of the power unit.
JP1340258A 1989-12-29 1989-12-29 Motorcycle Expired - Lifetime JPH0657546B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1340258A JPH0657546B2 (en) 1989-12-29 1989-12-29 Motorcycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1340258A JPH0657546B2 (en) 1989-12-29 1989-12-29 Motorcycle

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP58141910A Division JPH0631057B2 (en) 1983-08-04 1983-08-04 Motorcycle

Publications (2)

Publication Number Publication Date
JPH02225192A true JPH02225192A (en) 1990-09-07
JPH0657546B2 JPH0657546B2 (en) 1994-08-03

Family

ID=18335216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1340258A Expired - Lifetime JPH0657546B2 (en) 1989-12-29 1989-12-29 Motorcycle

Country Status (1)

Country Link
JP (1) JPH0657546B2 (en)

Also Published As

Publication number Publication date
JPH0657546B2 (en) 1994-08-03

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