JPH0550580B2 - - Google Patents
Info
- Publication number
- JPH0550580B2 JPH0550580B2 JP7225783A JP7225783A JPH0550580B2 JP H0550580 B2 JPH0550580 B2 JP H0550580B2 JP 7225783 A JP7225783 A JP 7225783A JP 7225783 A JP7225783 A JP 7225783A JP H0550580 B2 JPH0550580 B2 JP H0550580B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- intake
- carburetor
- intake pipe
- internal combustion
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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
- F02M35/1015—Air intakes; Induction systems characterised by the engine type
- F02M35/10196—Carburetted engines
-
- 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
- F02M35/104—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
- 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
- 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
- F02M35/161—Arrangement of the air intake system in the engine compartment, e.g. with respect to the bonnet or the vehicle front face
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、V型多気筒機関、特に車両用V型多
気筒内燃機関に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a V-type multi-cylinder engine, particularly a V-type multi-cylinder internal combustion engine for vehicles.
従来技術
多気筒内燃機関で、クランク軸方向の機関巾寸
法を短縮するためには、気筒配列をV型にすれば
よいが、機関の釣合いの面から通常気筒挟角は直
角となつているので、クランク軸方向に対して直
角な前後寸法が長くなる。Prior Art In order to shorten the engine width in the crankshaft direction of a multi-cylinder internal combustion engine, the cylinder arrangement can be made into a V-shape, but from the perspective of engine balance, the cylinder angle is usually set at a right angle. , the longitudinal dimension perpendicular to the crankshaft direction becomes longer.
解決しようとする課題
これを改善するために、クランクピンの取付け
位置およびバランスウエイトの取付け位置ならび
に質量を適宜選定することにより機関の釣合いを
保つ技術(特願昭56−177831号)が開発された
が、機関の給気系を簡略化するために、気化器を
気筒挟角側に配置した場合、気筒挟角を狭くする
につれて、気化器の配置位置が逆に高くなり、機
関全体を小型化することが困難であつた。Problems to be Solved In order to improve this, a technology was developed to maintain the balance of the engine by appropriately selecting the mounting position of the crank pin, the mounting position of the balance weight, and its mass (Japanese Patent Application No. 177831/1983). However, in order to simplify the engine's air supply system, if the carburetor is placed on the side of the cylinder angle, as the cylinder angle becomes narrower, the carburetor will be placed higher, making the entire engine smaller. It was difficult to do so.
課題を解決するための手段および作用効果
本発明は前記した難点を克服したV型多気筒内
燃機関の改良に係り、各気筒が車体前後方向へV
型にかつ該前後気筒が車体前後方向に略重なるよ
うに配置され、該各気筒の吸気ポートが気筒挟角
側に配設されたV型多気筒内燃機関において、前
記前後気筒挟角空間よりはずれた位置に前後気筒
に共通の一つの気化器が配設され、該気化器に接
続された吸気管は、前後吸気ポートより略等距離
に位置する前記気筒挟角空間略中央部に配置され
た一つの吸気管分岐部に連なり、該一つの吸気管
分岐部より前記各気筒の吸気ポートに略等長の吸
気分岐管が接続されたことを特徴するものであ
る。Means and Effects for Solving the Problems The present invention relates to an improvement of a V-type multi-cylinder internal combustion engine that overcomes the above-mentioned difficulties, in which each cylinder is
In a V-type multi-cylinder internal combustion engine in which the front and rear cylinders are arranged so as to substantially overlap in the longitudinal direction of the vehicle body, and the intake ports of each cylinder are arranged on the cylinder angle side, the engine is located outside the front and rear cylinder angle space. A single carburetor common to the front and rear cylinders is disposed at a position where the intake pipe connected to the carburetor is disposed approximately at the center of the cylinder confined space, which is located approximately equidistant from the front and rear intake ports. The present invention is characterized in that intake branch pipes of approximately equal length are connected to one intake pipe branch and are connected from the one intake pipe branch to the intake ports of each of the cylinders.
本発明は前記したように構成されているため、
内燃機関の小型化を図るべく前後気筒に共通の一
つの気化器を配設しているにもかかわらず、該前
後気筒から気化器迄の距離を等しくしており、そ
の結果、気筒間の吸気タイミングのずれを未然に
防止することが可能となり、安定した機関運転が
可能となる。 Since the present invention is configured as described above,
Although the same carburetor is installed between the front and rear cylinders in order to downsize the internal combustion engine, the distance from the front and rear cylinders to the carburetor is the same, and as a result, the intake air between the cylinders is This makes it possible to prevent timing deviations and enables stable engine operation.
また本発明では、前後気筒に共通の一つの気化
器を前後気筒挟角空間よりはずれた位置に配設し
たため、気筒挟角が狭い内燃機関であつても、こ
の狭い気筒挟角に影響されることなく、気筒間に
それぞれの前後気筒に気化器を付設したものに比
べて吸気装置の高さを低く設定でき、車体の低重
心化も図ることができるとともに、気筒に接し加
熱されて上昇する加熱空気を気化器に当てないよ
うにして該気化器を低温に保持し、吸気効率ひい
ては機関効率および機関出力の向上を図ることが
できる。 In addition, in the present invention, one carburetor common to the front and rear cylinders is disposed at a position away from the front and rear cylinder included angle space, so even if the internal combustion engine has a narrow cylinder included angle, it will not be affected by this narrow cylinder included angle. This allows the height of the intake system to be set lower than when a carburetor is attached to each of the front and rear cylinders between the cylinders, lowering the center of gravity of the car body, and increasing the temperature when it comes into contact with the cylinders and is heated. By preventing heated air from being applied to the carburetor, the carburetor can be maintained at a low temperature, thereby improving intake efficiency and thus engine efficiency and engine output.
実施例
以下第1図ないし第4図に図示された本発明の
一実施例について説明する。Embodiment An embodiment of the present invention illustrated in FIGS. 1 to 4 will be described below.
1は前車輪2を二輪、後車輪3を一輪それぞれ
具備した自動三輪車で、同自動三輪車1の前部車
体4内に動力装置6が搭載されている。 Reference numeral 1 denotes a tricycle having two front wheels 2 and one rear wheel 3, and a power unit 6 is mounted in the front body 4 of the tricycle 1.
また前記動力装置6は、気筒挟角が90°以下の
鋭角に設定されかつ機関の釣合いが保たれた前後
V型二気筒内燃機関7と、同内燃機関7のクラン
ク軸に連結された図示されないクラツチと変速機
構とよりなり、同変速機構の出力軸15に前車輪
2が連結されており、内燃機関7の出力はクラツ
チおよび変速機構を介して適当回転数に前車輪2
に伝達され、自動三輪車1は走行しうるようにな
つている。 The power unit 6 also includes a front and rear V-type two-cylinder internal combustion engine 7 whose cylinder angle is set to an acute angle of 90° or less and whose engine is balanced, and which is connected to a crankshaft of the internal combustion engine 7 (not shown). The front wheels 2 are connected to the output shaft 15 of the transmission mechanism, and the output of the internal combustion engine 7 is transmitted to the front wheels 2 at an appropriate rotational speed via the clutch and the transmission mechanism.
The three-wheeled vehicle 1 is now able to travel.
さらに前記前後V型二気筒内燃機関7の前方の
シリンダ8aは機関7の巾方向中心より左方へA
だけオフセツトされるとともに後方のシリンダ8
bは巾方向中心より右方へAだけオフセツトさ
れ、しかも第4図で0点を中心として中心対称に
シリンダ8a,8bは配置され、各シリンダヘツ
ド9a,9bにおいては、シリンダ挟角側に吸気
ポート10a,10bがそれぞれ配設され、その
反対側に排気ポート11a,11bが配設されて
いる。 Furthermore, the front cylinder 8a of the front and rear V-type two-cylinder internal combustion engine 7 is moved to the left from the center in the width direction of the engine 7.
The rear cylinder 8 is offset by
b is offset by A to the right from the center in the width direction, and the cylinders 8a and 8b are arranged symmetrically with respect to the 0 point in FIG. Ports 10a and 10b are provided, respectively, and exhaust ports 11a and 11b are provided on the opposite side.
さらにまた車体左側から車体巾方向中央に向い
車体巾方向に指向して前後シリンダヘツド9a,
9bの中間に吸気管12が配設され、同吸気管1
2の分岐部13は吸気ポート10a,10bを結
ぶ溝の中心点0に配置され、同吸気管12にキヤ
ブレター14が介装されている。 Furthermore, the front and rear cylinder heads 9a are arranged from the left side of the vehicle body toward the center in the vehicle width direction.
An intake pipe 12 is arranged in the middle of the intake pipe 9b.
The second branch 13 is located at the center point 0 of the groove connecting the intake ports 10a and 10b, and a carburetor 14 is interposed in the intake pipe 12.
第1図ないし第4図に図示の実施例では、前記
したようにシリンダ8a,8bの挟角90°以下の
狭い角度に設定しているため、前後V型二気筒内
燃機関7の前後寸法を短縮して動力装置6を小型
化することができる。 In the embodiment shown in FIGS. 1 to 4, since the included angle of the cylinders 8a and 8b is set to a narrow angle of 90° or less as described above, the front and rear dimensions of the V-type two-cylinder internal combustion engine 7 are By shortening the length, the power unit 6 can be made smaller.
また前記実施例においては、車体左側から車体
巾方向中央に向い車体巾方向に指向して前後シリ
ンダヘツド9a,9bの中間に吸気管12を配設
し、前記吸気ポート10a,10bを結ぶ線の中
心点0に前記吸気管12の分岐部13を配置し、
同吸気管12にキヤブレター14を介装したた
め、吸気系をシリンダヘツド9a,9bより下方
へ突出させないようにすることができ、その結
果、前部車体4のボンネツト5を下げて、車高を
低くでき、空力特注に優れたものとすることがで
きる。 Further, in the embodiment, an intake pipe 12 is disposed between the front and rear cylinder heads 9a, 9b, oriented from the left side of the vehicle body toward the center in the width direction of the vehicle body, and a line connecting the intake ports 10a, 10b is provided. The branch part 13 of the intake pipe 12 is arranged at the center point 0,
Since the carburetor 14 is installed in the intake pipe 12, the intake system can be prevented from protruding below the cylinder heads 9a, 9b, and as a result, the bonnet 5 of the front body 4 can be lowered to lower the vehicle height. It can be customized with excellent aerodynamics.
さらにキヤブレター14を前後シリンダ8a,
8b間の気筒挟角空間から車体巾外側方へ配設し
たため、シリンダ8a,8bに接し加熱されて上
昇する加熱空気をキヤブレター14に当てないよ
うにして該キヤブレター14を低温に保持し、吸
気効率ひいては機関効率および機関出力の向上を
図ることができる。 Further, the carburetor 14 is connected to the front and rear cylinders 8a,
Since the cylinders are disposed from the angular space between the cylinders 8b toward the outside of the vehicle body width, the heated air that comes into contact with the cylinders 8a and 8b and rises is prevented from hitting the carburetor 14, thereby keeping the carburetor 14 at a low temperature and improving intake efficiency. As a result, it is possible to improve engine efficiency and engine output.
第1図ないし第4図に図示の実施例では、吸気
ポート10a,10bを結ぶ線の中心点0より車
体左側に向い車体巾方向に吸気管12を指向させ
たが、第5図に図示するように、吸気ポート10
a,10bを結ぶ線の中心点0より同線に対して
直角でかつ車体斜後方に向い吸気管12を指向さ
せてもよく、このような実施例では、吸気管12
を通過した混合気を前後吸気ポート10a,10
bに均等に分配することができる。 In the embodiment shown in FIGS. 1 to 4, the intake pipe 12 is oriented toward the left side of the vehicle body from the center point 0 of the line connecting the intake ports 10a and 10b, and in the width direction of the vehicle body. As in, intake port 10
The intake pipe 12 may be directed from the center point 0 of the line connecting a and 10b at a right angle to the same line and toward the rear of the vehicle body. In such an embodiment, the intake pipe 12
The air-fuel mixture that has passed through the front and rear intake ports 10a, 10
b can be equally distributed.
第1図は本発明の一実施例に係る多気筒内燃機
関を搭載した自動三輪車の斜視図、第2図はその
側面図、第3図は前記実施例の側面図、第4図は
その横断平面図、第5図は本発明の他の実施例を
図示した横断平面図である。
1……自動三輪車、2……前車輪、3……後車
輪、4……前部車体、5……ボンネツト、6……
動力装置、7……前後V型二気筒内燃機関、8…
…シリンダ、9……シリンダヘツド、10,11
……吸気ポート10、12……吸気管、13……
吸気管分岐部、14……キヤブレター、15……
出力軸。
Fig. 1 is a perspective view of a tricycle equipped with a multi-cylinder internal combustion engine according to an embodiment of the present invention, Fig. 2 is a side view thereof, Fig. 3 is a side view of the embodiment, and Fig. 4 is a cross-sectional view thereof. The plan view, FIG. 5, is a cross-sectional plan view illustrating another embodiment of the present invention. 1...Auto tricycle, 2...Front wheel, 3...Rear wheel, 4...Front body, 5...Bonnet, 6...
Power plant, 7...Front and rear V-type two-cylinder internal combustion engine, 8...
...Cylinder, 9...Cylinder head, 10, 11
...Intake ports 10, 12...Intake pipe, 13...
Intake pipe branch, 14... Carburetor, 15...
output shaft.
Claims (1)
筒が車体前後方向へ略重なるよう配置され、該各
気筒の吸気ポートが気筒挟角側に配設されたV型
多気筒内燃機関において、前記前後気筒挟角空間
よりはずれた位置に前後気筒に共通の一つの気化
器が配設され、該気化器に接続された吸気管は、
前後吸気ポートより略等距離に位置する前記気筒
挟角空間略中央部に配置された一つの吸気管分岐
部に連なり、該一つの吸気管分岐部より前記各気
筒の吸気ポートに略等長の吸気分岐管が接続され
たことを特徴するV型多気筒内燃機関。1. In a V-type multi-cylinder internal combustion engine in which each cylinder is arranged in a V-shape in the longitudinal direction of the vehicle body, the front and rear cylinders are arranged so as to substantially overlap in the longitudinal direction of the vehicle body, and the intake port of each cylinder is arranged on the cylinder included angle side, A carburetor common to the front and rear cylinders is disposed at a position apart from the angular space between the front and rear cylinders, and an intake pipe connected to the carburetor is
The intake pipe is connected to one intake pipe branch located approximately at the center of the cylinder-included space, which is located at approximately the same distance from the front and rear intake ports, and extends from the one intake pipe branch to the intake port of each cylinder with approximately equal length. A V-type multi-cylinder internal combustion engine characterized by a connected intake branch pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58072257A JPS59200052A (en) | 1983-04-26 | 1983-04-26 | V-shape multi-cylinder type internal-combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58072257A JPS59200052A (en) | 1983-04-26 | 1983-04-26 | V-shape multi-cylinder type internal-combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59200052A JPS59200052A (en) | 1984-11-13 |
JPH0550580B2 true JPH0550580B2 (en) | 1993-07-29 |
Family
ID=13484056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58072257A Granted JPS59200052A (en) | 1983-04-26 | 1983-04-26 | V-shape multi-cylinder type internal-combustion engine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59200052A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010229949A (en) * | 2009-03-27 | 2010-10-14 | Honda Motor Co Ltd | Inlet passage structure of v-shaped internal combustion engine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63154851A (en) * | 1986-12-16 | 1988-06-28 | Kawasaki Heavy Ind Ltd | Manifold for v-type engine and manufacture thereof |
JP2673514B2 (en) * | 1987-05-19 | 1997-11-05 | ヤマハ発動機株式会社 | Motorcycle air intake system |
JP2534924Y2 (en) * | 1988-02-17 | 1997-05-07 | 川崎重工業株式会社 | Intake device for two-cylinder engine |
US8726881B2 (en) * | 2009-03-27 | 2014-05-20 | Honda Motor Co., Ltd | Inlet passage structure of V-type internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5427485A (en) * | 1977-08-01 | 1979-03-01 | Nittan Co Ltd | Photoelectric smoke detector |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56118929U (en) * | 1980-02-14 | 1981-09-10 | ||
JPS58154860U (en) * | 1982-04-12 | 1983-10-17 | 日産自動車株式会社 | V-type internal combustion engine intake system |
-
1983
- 1983-04-26 JP JP58072257A patent/JPS59200052A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5427485A (en) * | 1977-08-01 | 1979-03-01 | Nittan Co Ltd | Photoelectric smoke detector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010229949A (en) * | 2009-03-27 | 2010-10-14 | Honda Motor Co Ltd | Inlet passage structure of v-shaped internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JPS59200052A (en) | 1984-11-13 |
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