JPS60156967A - Arrangement for driving fuel pump in fuel injection type engine - Google Patents

Arrangement for driving fuel pump in fuel injection type engine

Info

Publication number
JPS60156967A
JPS60156967A JP1100984A JP1100984A JPS60156967A JP S60156967 A JPS60156967 A JP S60156967A JP 1100984 A JP1100984 A JP 1100984A JP 1100984 A JP1100984 A JP 1100984A JP S60156967 A JPS60156967 A JP S60156967A
Authority
JP
Japan
Prior art keywords
crankshaft
injection pump
engine
pump
drive 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
JP1100984A
Other languages
Japanese (ja)
Other versions
JPH0379547B2 (en
Inventor
Ryoji Nakahama
中浜　良二
Yukio Matsushita
松下　行男
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 Marine Co Ltd
Original Assignee
Sanshin Kogyo KK
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 Sanshin Kogyo KK filed Critical Sanshin Kogyo KK
Priority to JP1100984A priority Critical patent/JPS60156967A/en
Publication of JPS60156967A publication Critical patent/JPS60156967A/en
Publication of JPH0379547B2 publication Critical patent/JPH0379547B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine 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
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE:To make it possible to drive a pump by a crankshaft on rotation without the strength of the crankshaft being deteriorated, by connecting a drive shaft which is longitudinally laid, to the projected lower end of a crankshaft through a power transmitting member. CONSTITUTION:Upon operation of an engine 15 an injection pump 26 is driven by a crank shaft 21 and the drive shaft 27 of an injection pump 26 which are associated together. No power transmitting member is provided to the top end of the crankshaft although a timing belt 42 is wound around the lower end of the crankshaft 21, and therefore, the length of the upper end part of the crankshaft 21 projected from the engine body 17 may be made relatively short so that vibration which is generated in the crankshaft 21 due to rotation of a flywheel 22 is restrained from being increased. With this arrangement the injection pump 26 may be driven by the crankshaft 21 which is rotated without the strength of the crankshaft 21 being deteriorated.

Description

【発明の詳細な説明】 ［技術分野］ 本発明は、燃料噴射機関の噴射ポンプ駆動構造に関する
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an injection pump drive structure for a fuel injection engine.

［発明の背景］ 従来のディーゼル機関には、クランク軸を縦置配置する
とともに、燃料噴射ポンプの駆動軸をも縦置配置し、ク
ランク軸の機関本体から突出する部分と噴射ポンプの駆
動軸とを動力伝達部材によって連結してなるものがある
。[Background of the Invention] In a conventional diesel engine, the crankshaft is arranged vertically, and the drive shaft of the fuel injection pump is also arranged vertically. There is one in which the two are connected by a power transmission member.

しかしながら、上記従来の噴射ポンプ駆動構造にあって
は、クランク軸の機関本体から突出する部分における上
記動力伝達部材の結合部の上端側にフライホイールを備
えていることから、クランク軸の機関本体から突出する
部分の長さが大となる。従って、機関の最高回転速度が
比較的高く設定されている場合には、クランク軸にフラ
イホイールの回転による横振動、共振を生ずるおそれが
あり、該振動増大を抑制するため、クランク軸の軸径を
大とする等の必要を生ずる。However, in the above-mentioned conventional injection pump drive structure, since the flywheel is provided on the upper end side of the coupling part of the power transmission member in the part of the crankshaft that protrudes from the engine body, The length of the protruding part becomes large. Therefore, if the maximum rotational speed of the engine is set relatively high, there is a risk that lateral vibrations and resonances will occur on the crankshaft due to the rotation of the flywheel. This creates the need to increase the

［発明の目的］ 本発明は、クランク軸の強度を損なうことのない状態で
、クランク軸の回転によって噴射ポンプを駆動可能とす
ることを目的とする。[Object of the Invention] An object of the present invention is to enable an injection pump to be driven by rotation of the crankshaft without impairing the strength of the crankshaft.

［発明の構成］ 上記目的を達成するため、本発明は、クランク軸を縦置
配置し、該クランク軸の機関本体から突出する上端部に
フライホイールを備えてなる燃料噴射機関の噴射ポンプ
駆動構造において、噴射ポンプの駆動軸を縦置配置し、
クランク軸の機関本体から突出する下端部と噴射ポンプ
の駆動軸とを動力伝達部材を介して連結してなるように
したものである。[Structure of the Invention] In order to achieve the above object, the present invention provides an injection pump drive structure for a fuel injection engine, in which a crankshaft is arranged vertically and a flywheel is provided at the upper end of the crankshaft protruding from the engine body. , the drive shaft of the injection pump is arranged vertically,
The lower end of the crankshaft protruding from the engine body and the drive shaft of the injection pump are connected via a power transmission member.

［発明の詳細な説明］ 第１図は本発明の一実施例が適用されてなる船外機を示
す側面図、第２図は第１図の平面図、第３図は第１図の
噴射ポンプを取出して示す断面図、第４図は第３図のＩ
Ｖ−ＩＶ線に沿う断面図、第５図は第１図のクランク軸
下端部を示す断面図、第６図は第５図のＶｌ−Ｖｌ線に
沿う断面図である。[Detailed Description of the Invention] FIG. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, FIG. 2 is a plan view of FIG. 1, and FIG. A sectional view showing the pump taken out, Figure 4 is I of Figure 3.
5 is a sectional view taken along line V-IV, FIG. 5 is a sectional view showing the lower end of the crankshaft in FIG. 1, and FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 5.

船外機ｌＯは、船体の船尾板１１に、クランブブラケフ
トエ２およびスイベルブラケット１３を介して、推進ユ
ニット１４を支持可能としている。推進ユニット１４は
カウリング１４Ａによって覆われる機関１５を上部に備
え、プロペラ１６を駆動可能としている。The outboard motor IO is capable of supporting a propulsion unit 14 on a stern plate 11 of the hull via a clamp bracket 2 and a swivel bracket 13. The propulsion unit 14 includes an engine 15 at the top covered by a cowling 14A, and is capable of driving a propeller 16.

機関１５は、２気筒２サイクル内燃機関であり、機関本
体１７に、吸気管１８、バタフライバルブ１９、吸気箱
２０を接続している。The engine 15 is a two-cylinder, two-stroke internal combustion engine, and has an engine body 17 connected to an intake pipe 18, a butterfly valve 19, and an intake box 20.

また、機関１５は、クランク軸２１を縦置配置し、クラ
ンク軸２１の機関本体１７から突出する上端部にフライ
ホイール２２を備えている。クランク軸２１の下端部は
、第５図に示すように、機関本体１７に固定されるオイ
ルシールハウジング２３より突出するとともに、機関１
５の出力をプロペラ１６に伝達する伝動軸２４を固定化
されている。なお、オイルシールハウジング２３は、ク
ランク軸２１との間にオイルシール２５を保持している
。Further, the engine 15 has a crankshaft 21 disposed vertically, and is provided with a flywheel 22 at an upper end portion of the crankshaft 21 protruding from the engine body 17. As shown in FIG. 5, the lower end of the crankshaft 21 protrudes from an oil seal housing 23 fixed to the engine body 17, and
A transmission shaft 24 that transmits the output of 5 to the propeller 16 is fixed. Note that the oil seal housing 23 holds an oil seal 25 between it and the crankshaft 21.

また、機関１５は、機関本体１７の側部に噴射ポンプ２
６を備えている。噴射ポンプ２６は、駆動軸２７を縦置
配置される状態で、後述するようにクランク軸２１に連
動して駆動され、配管２８を介して、各気筒に対応する
噴射ノズル２９に高圧燃料を供給可能としている。また
１機関１５は、点火コイル３０、各気筒に対応する点火
栓３１を備えている。The engine 15 also has an injection pump 2 mounted on the side of the engine body 17.
It is equipped with 6. The injection pump 26 is driven in conjunction with the crankshaft 21 with the drive shaft 27 disposed vertically, as will be described later, and supplies high-pressure fuel to the injection nozzles 29 corresponding to each cylinder via the piping 28. It is possible. Each engine 15 also includes an ignition coil 30 and a spark plug 31 corresponding to each cylinder.

ここで、噴射ポンプ２６は、ベーン式フィードポンプ３
２を内蔵しており、ベーン式フィードポンプ３２は、ク
ランク軸２１に連動可能に結合されている前記駆動軸２
７の回転によって駆動され、その送油圧は圧力調整弁３
３の作用によって制御され、燃料をポンプ室３４へ送油
可能としている。噴射ポンプ２６のポンププランジャ３
５は、駆動軸２７に接続されたカムプレート３６によっ
て駆動され、回転運動するとともに往復運動して、ポン
プ室３４の燃料を吸入した後、機関１５の各気筒に対応
する分配通路３７、分配弁３８を通って、配管２８に圧
送し、ひいては噴射ノズル２９から高圧噴射可能として
いる。なお、噴射ノズル２９からの噴射量はスピルリン
グ３９の移動によって制御可能とされている。３５Ａは
ポンププランジャ３５の収容空間に対する閉止ねじであ
る。Here, the injection pump 26 is the vane type feed pump 3
2, and the vane type feed pump 32 is connected to the drive shaft 2 which is operatively connected to the crankshaft 21.
It is driven by the rotation of 7, and the oil pressure is sent to the pressure regulating valve 3.
3, the fuel can be sent to the pump chamber 34. Pump plunger 3 of injection pump 26
5 is driven by a cam plate 36 connected to the drive shaft 27, rotates and reciprocates, and after sucking fuel from the pump chamber 34, distributes through the distribution passage 37 and distribution valve corresponding to each cylinder of the engine 15. 38, the liquid is fed under pressure to the pipe 28, and can be injected at high pressure from the injection nozzle 29. Note that the amount of injection from the injection nozzle 29 can be controlled by moving the spill ring 39. 35A is a closing screw for the accommodation space of the pump plunger 35.

しかして、この実施例においては、クランク軸２１の機
関本体１７から突出する下端部にプーリー４０を固定す
るとともに、噴射ポンプ２６の駆動軸２７の下端部にプ
ーリー４１を固定し、両プーリー４０．４１にタイミン
グベルト４２を巻掛ることによって、噴射ポンプ２６の
駆動軸２７を機関１５のクランク軸２１に連動可能に結
合している。In this embodiment, the pulley 40 is fixed to the lower end of the crankshaft 21 protruding from the engine body 17, and the pulley 41 is fixed to the lower end of the drive shaft 27 of the injection pump 26, and both pulleys 40. By wrapping a timing belt 42 around the engine 15, the drive shaft 27 of the injection pump 26 is coupled to the crankshaft 21 of the engine 15 so as to be interlockable.

なお、プーリー４０は、タイミングベルト４２を一側方
からその外周部に容易に装着可能とするように、側板４
３を伴う状態で、ポルト４４によってクランク軸２１に
固定されている。また、プーリー４０は、クランク軸２
１への固定状態下で、前記オイルシールハウジング２３
の下端部を収容、包囲する凹部４５を備え、プーリー４
０および側板４３は、上記凹部４５を側板４３の下方空
間に連通する孔４６．４７をそれらの周方向複数位置に
備え、これらにより、オイルシールハウジング２３の下
端部から外方に飛散する機関１５の潤滑油を凹部４５、
孔４６．４７を介してプーリー４０および側板４３の下
方空間へ誘導可能とし、タイミングベルト４２への潤滑
油の付着によって、クランク軸２１と噴射ポンプ２６の
駆動軸２７との間に回転のタイミングずれを生ずること
の可能性を排除可能としている。Note that the pulley 40 has a side plate 4 so that the timing belt 42 can be easily attached to the outer circumference from one side.
3, and is fixed to the crankshaft 21 by a port 44. Further, the pulley 40 is connected to the crankshaft 2
1, the oil seal housing 23
The pulley 4 has a recess 45 that accommodates and surrounds the lower end of the pulley 4.
0 and the side plate 43 are provided with holes 46 and 47 at a plurality of positions in the circumferential direction that communicate the recess 45 with the space below the side plate 43, so that the engine 15 is scattered outward from the lower end of the oil seal housing 23. lubricating oil into the recess 45,
The lubricating oil can be guided to the space below the pulley 40 and the side plate 43 through the holes 46 and 47, and due to the lubricant oil adhering to the timing belt 42, there is a rotational timing deviation between the crankshaft 21 and the drive shaft 27 of the injection pump 26. This makes it possible to eliminate the possibility of this occurring.

次に、上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.

機関１５の運転時には、クランク軸２１と噴射ポンプ２
６の駆動軸２７との連動により、噴射ポンプ２６が駆動
される。ここで、上記実施例においては、クランク軸２
１の下端部にタイミングベルト４２を巻掛け、その上端
部に何ら動力伝達部材を設けないので、クランク軸２１
の機関本体１７から突出する上端部の長さを比較的小と
し、フライホイール２２の回転によって生ずるクランク
軸２１の振動増大を抑制し、従ってクランク軸２１の強
度を損なうことのない状態で、クランク軸２１の回転に
よって噴射ポンプ２６を駆動することが可能となる。When the engine 15 is operating, the crankshaft 21 and the injection pump 2
The injection pump 26 is driven in conjunction with the drive shaft 27 of No. 6. Here, in the above embodiment, the crankshaft 2
Since the timing belt 42 is wound around the lower end of the crankshaft 21 and no power transmission member is provided at the upper end of the timing belt 42, the crankshaft 21
By making the length of the upper end protruding from the engine body 17 of the engine relatively small, the increase in vibration of the crankshaft 21 caused by the rotation of the flywheel 22 is suppressed, and therefore the crankshaft is Rotation of the shaft 21 makes it possible to drive the injection pump 26.

また、上記実施例においては、噴射ポンプ２６の内部に
おける燃料の流れ方向が、下方に位置するフィードポン
プ３２から上方に位置する分配弁３８に向かっており、
従って、噴射ポンプ２６の運転状態下で配管２８を取外
すことにより、噴射ポンプ２６の内部に存在する空気に
作用する浮力を利用し、該空気を容易に噴射ポンプ２６
の外部に排出可能である。また、噴射ポンプ２６におい
てポンププランジャ３５の収容空間を閉止している閉止
ねじ３５Ａが、噴射ポンプ２６の上端面に位置している
ことから、該閉止ねじ３５Ａの取外し作業を容易に行う
ことが可能であり、ポンププランジャ３５の往復移動状
態の検出による噴射ポンプ２６の噴射時期確認作業を容
易に行うことが可能である。Further, in the above embodiment, the direction of flow of fuel inside the injection pump 26 is from the feed pump 32 located below toward the distribution valve 38 located above;
Therefore, by removing the piping 28 while the injection pump 26 is in operation, the air can be easily transferred to the injection pump 26 by utilizing the buoyancy acting on the air existing inside the injection pump 26.
can be discharged to the outside. Furthermore, since the closing screw 35A that closes the housing space for the pump plunger 35 in the injection pump 26 is located on the upper end surface of the injection pump 26, it is possible to easily remove the closing screw 35A. Therefore, it is possible to easily confirm the injection timing of the injection pump 26 by detecting the reciprocating state of the pump plunger 35.

なお、上記実施例は本発明を２サイクル内燃機関に適用
する場合について説明したが１本発明は、４サイクル内
燃機関、ディーゼル機関等にも同様に適用可能である。Although the above embodiment describes the case where the present invention is applied to a two-stroke internal combustion engine, the present invention is equally applicable to a four-stroke internal combustion engine, a diesel engine, and the like.

［発明の効果］ 以上のように、本発明は、クランク軸を縦置配置し、該
クランク軸の機関本体から突出する上端部にフライホイ
ールを備えてなる燃料噴射機関の噴射ポンプ駆動構造に
おいて、噴射ポンプの駆動軸を縦置配置し、クランク軸
の機関本体から突出する下端部と噴射ポンプの駆動軸と
を動力伝達部材を介して連結してなるようにしたもので
ある。[Effects of the Invention] As described above, the present invention provides an injection pump drive structure for a fuel injection engine in which a crankshaft is arranged vertically and a flywheel is provided at the upper end of the crankshaft protruding from the engine body. The drive shaft of the injection pump is arranged vertically, and the lower end of the crankshaft protruding from the engine body is connected to the drive shaft of the injection pump via a power transmission member.

従って、クランク軸の上端部に動力伝達部材を設けない
ので、クランク軸の機関本体から突出する上端部の長さ
を比較的小とし、フライホイールの回転によって生ずる
クランク軸の振動増大を抑制し、従ってクランク軸の強
度を損なうことのない状態で、クランク軸の回転によっ
て噴射ポンプを駆動することが可能となる。Therefore, since no power transmission member is provided at the upper end of the crankshaft, the length of the upper end of the crankshaft protruding from the engine body is made relatively small, and the increase in vibration of the crankshaft caused by rotation of the flywheel is suppressed. Therefore, the injection pump can be driven by rotation of the crankshaft without impairing the strength of the crankshaft.

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

第１図は本発明の一実施例が適用されてなる船外機を示
す側面図、第２図は第１図の平面図、第３図は第１図の
噴射ポンプを取出して示す断面図、第４図は第３図のＩ
Ｖ−ｆｆ線に沿う断面図、第５図は第１図のクランク軸
下端部を示す断面図、第６図は第５図のＶｌ−Ｖｌ線に
沿う断面図である。 １５・・・機関、１７川機関本体、２１・・・クランク
軸、２２・・・フライホイール、２６・・・噴射ポンプ
、２７・・・駆動軸、４ｏ、４１・・・プーリー、４２
・・・タイミングベルト。 代理人　弁理士　塩　川　修　治Fig. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a sectional view showing the injection pump of Fig. 1 taken out. , Figure 4 is I of Figure 3.
5 is a sectional view taken along the line V-ff, FIG. 5 is a sectional view showing the lower end of the crankshaft in FIG. 1, and FIG. 6 is a sectional view taken along the line Vl-Vl in FIG. 5. 15... Engine, 17 Engine body, 21... Crankshaft, 22... Flywheel, 26... Injection pump, 27... Drive shaft, 4o, 41... Pulley, 42
···Timing belt. Agent Patent Attorney Osamu Shiokawa

Claims (1)

【特許請求の範囲】[Claims] （１）クランク軸を縦置配置し、該クランク軸の機関本
体から突出する上端部にフライホイールを備えてなる燃
料噴射機関の噴射ポンプ駆動構造において、噴射ポンプ
の駆動軸を縦置配置し、クランク軸の槻叩本体から突出
する下端部と噴射ポンプの駆動軸とを動力伝達部材を介
して連結してなることを特徴とする燃料噴射機関の噴射
ポンプ駆動構造。(1) In an injection pump drive structure for a fuel injection engine in which a crankshaft is arranged vertically and a flywheel is provided at the upper end of the crankshaft protruding from the engine body, the drive shaft of the injection pump is arranged vertically, An injection pump drive structure for a fuel injection engine, characterized in that a lower end of a crankshaft protruding from a hammer body and a drive shaft of an injection pump are connected via a power transmission member.
JP1100984A 1984-01-26 1984-01-26 Arrangement for driving fuel pump in fuel injection type engine Granted JPS60156967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1100984A JPS60156967A (en) 1984-01-26 1984-01-26 Arrangement for driving fuel pump in fuel injection type engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1100984A JPS60156967A (en) 1984-01-26 1984-01-26 Arrangement for driving fuel pump in fuel injection type engine

Publications (2)

Publication Number Publication Date
JPS60156967A true JPS60156967A (en) 1985-08-17
JPH0379547B2 JPH0379547B2 (en) 1991-12-19

Family

ID=11766118

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1100984A Granted JPS60156967A (en) 1984-01-26 1984-01-26 Arrangement for driving fuel pump in fuel injection type engine

Country Status (1)

Country Link
JP (1) JPS60156967A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811717A (en) * 1986-02-12 1989-03-14 Sanshin Kogyo Kabushiki Kaisha Device driving injection pump for fuel-injection engine
US5411218A (en) * 1992-07-02 1995-05-02 Daiwa Seiko, Inc. Bearing type drag mechanism for fishing reel
JPH11270427A (en) * 1998-03-25 1999-10-05 Sanshin Ind Co Ltd Cylinder fuel injection type engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4811717A (en) * 1986-02-12 1989-03-14 Sanshin Kogyo Kabushiki Kaisha Device driving injection pump for fuel-injection engine
US5411218A (en) * 1992-07-02 1995-05-02 Daiwa Seiko, Inc. Bearing type drag mechanism for fishing reel
JPH11270427A (en) * 1998-03-25 1999-10-05 Sanshin Ind Co Ltd Cylinder fuel injection type engine

Also Published As

Publication number Publication date
JPH0379547B2 (en) 1991-12-19

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