JP2008088865A - Lubricating device for engine - Google Patents

Lubricating device for engine Download PDF

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JP2008088865A
JP2008088865A JP2006269346A JP2006269346A JP2008088865A JP 2008088865 A JP2008088865 A JP 2008088865A JP 2006269346 A JP2006269346 A JP 2006269346A JP 2006269346 A JP2006269346 A JP 2006269346A JP 2008088865 A JP2008088865 A JP 2008088865A
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oil
engine
oil passage
passage
pan
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Takeshi Inaba
剛 因幡
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2006269346A priority Critical patent/JP2008088865A/en
Priority to US11/902,702 priority patent/US7571705B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating device for an engine of light weight and a simple structure. <P>SOLUTION: The lubricating device for the engine is provided with an oil pan 25 arranged at a lower part of the engine E and storing lubricating oil 32, an oil pump 31 arranged above the oil pan 25 and driven by the engine E, a suction oil passage 33 leading oil 32 in the oil pan 25 to a suction port of the oil pump 31, and an oil supply passage 38 leading oil delivered from a delivery port of the oil pump 31 to the lubricating parts 39-41 of the engine E. The suction oil passage 33 is divided to an upstream oil passage 33a in an oil pan 25 side and a downstream oil passage 33b in an oil pump 31 side, and a filter gauze 24 as a strainer is put between the upstream oil passage 33a and the downstream oil passage 33b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は，エンジンの下部に配置されて潤滑オイルを貯留するオイルパンと，このオイルパンの上方に配置されてエンジンにより駆動されるオイルポンプと，オイルパン内のオイルをオイルポンプの吸入ポートに誘導する吸い上げ油路と，オイルポンプの吐出ポートから吐出されるオイルをエンジンの潤滑部に誘導する供給油路と，オイルポンプがオイルパンから吸い上げるオイルを濾過するストレーナとを備える，エンジンの潤滑装置の改良に関する。   The present invention includes an oil pan disposed in a lower part of an engine for storing lubricating oil, an oil pump disposed above the oil pan and driven by the engine, and oil in the oil pan as an intake port of the oil pump. Lubricating device for an engine comprising a suction oil passage for guiding, a supply oil passage for guiding oil discharged from an oil pump discharge port to an engine lubricating portion, and a strainer for filtering oil sucked up from an oil pan by the oil pump Regarding improvements.

かゝるエンジンの潤滑装置は，特許文献１に開示されているように知られている。
特開平７−３０５６１７号明細書 Such an engine lubrication device is known as disclosed in Patent Document 1.
JP-A-7-305617

従来のかゝるエンジンの潤滑装置では，オイルパン内に配置される吸い上げ管の下端にストレーナが取り付けている。この場合のストレーナは，吸い上げ管の下端開口部に直接接続されるストレーナケースと，このストレーナケース内に張設される濾網とで構成されているので，重量が重く，それ自体の慣性力で吸い上げ管と共に揺動を生じ易く，その揺動を防ぐために，オイルパンの内壁から延出したステーにより吸い上げ管を支持している。このように，従来のものは，重量が大である上，構造が複雑となっている。   In such a conventional engine lubrication device, a strainer is attached to the lower end of the suction pipe disposed in the oil pan. The strainer in this case is composed of a strainer case that is directly connected to the lower end opening of the suction pipe and a filter net that is stretched in the strainer case. Therefore, the strainer is heavy and has its own inertial force. The suction pipe is supported by a stay extending from the inner wall of the oil pan in order to easily cause a swing with the suction pipe and to prevent the swing. Thus, the conventional one is heavy and has a complicated structure.

本発明は，かゝる点に鑑みてなされたもので，軽量で，しかも構造が簡単な前記エンジンの潤滑装置を提供することを目的とする。   The present invention has been made in view of the above points, and an object of the present invention is to provide a lubricating device for an engine which is lightweight and has a simple structure.

上記目的を達成するために，本発明は，エンジンの下部に配置されて潤滑オイルを貯留するオイルパンと，このオイルパンの上方に配置されてエンジンにより駆動されるオイルポンプと，オイルパン内のオイルをオイルポンプの吸入ポートに誘導する吸い上げ油路と，オイルポンプの吐出ポートから吐出されるオイルをエンジンの潤滑部に誘導する供給油路と，オイルポンプがオイルパンから吸い上げるオイルを濾過するストレーナとを備える，エンジンの潤滑装置において，前記吸い上げ油路を，オイルパン側の上流油路と，オイルポンプ側の下流油路とに分割し，これら上流油路及び下流油路間に，ストレーナとしての濾網を挟み込んだことを第１の特徴とする。   In order to achieve the above object, the present invention provides an oil pan that is disposed at a lower portion of an engine and stores lubricating oil, an oil pump that is disposed above the oil pan and is driven by the engine, Suction oil passage that guides oil to the suction port of the oil pump, supply oil passage that guides oil discharged from the discharge port of the oil pump to the lubrication part of the engine, and strainer that filters the oil that the oil pump sucks up from the oil pan In the engine lubrication apparatus, the suction oil passage is divided into an upstream oil passage on the oil pan side and a downstream oil passage on the oil pump side, and a strainer is provided between the upstream oil passage and the downstream oil passage. The first feature is that the filter screen is sandwiched.

また本発明は，第１の特徴に加えて，前記上流油路をオイルパンの側壁に一体に形成したことを第２の特徴とする。   In addition to the first feature, the second feature of the present invention is that the upstream oil passage is integrally formed on the side wall of the oil pan.

さらに本発明は，第２の特徴に加えて，オイルパンの上端面にガスケットを介して接合してそれを支持するケース部材に前記下流油路を設け，前記ガスケットに前記濾網を連設したことを第３の特徴とする。   In addition to the second feature of the present invention, the downstream oil passage is provided in a case member joined to and supported by the upper end surface of the oil pan via a gasket, and the filter net is provided continuously to the gasket. This is the third feature.

前記ケース部材は，後述する本発明の実施例中のマウントケース１６に対応する。   The case member corresponds to the mount case 16 in the embodiment of the present invention described later.

本発明の第１の特徴によれば，ストレーナ機能を発揮する濾網は，吸い上げ油路の上流油路及び下流油路間に挟まれるので，従来のストレーナのようなストレーナケースを必要とせず，潤滑装置の軽量化に寄与し得る。   According to the first feature of the present invention, since the filter screen that exhibits the strainer function is sandwiched between the upstream oil passage and the downstream oil passage of the suction oil passage, a strainer case like a conventional strainer is not required, This can contribute to weight reduction of the lubricating device.

本発明の第２の特徴によれば，吸い上げ油路の上流油路は，オイルパンの側壁に一体に形成されるので，従来のように吸い上げ管を支持するステーは不要となり，これにより潤滑装置の更なる軽量化に寄与し得る。   According to the second feature of the present invention, since the upstream oil passage of the suction oil passage is formed integrally with the side wall of the oil pan, a stay for supporting the suction pipe is not required as in the prior art. It can contribute to further weight saving.

本発明の第３の特徴によれば，濾網は，ケース部材及びオイルパンの接合面間に介装されるガスケットに一体に連設されることにより，濾網の支持構造が簡単且つ確実であり，潤滑装置のコスト低減に寄与し得る。   According to the third aspect of the present invention, the filter net is integrally connected to the gasket interposed between the joint surface of the case member and the oil pan, so that the support structure of the filter net is simple and reliable. Yes, it can contribute to cost reduction of lubrication equipment.

本発明の実施の形態を，図面に示す本発明の好適な実施例に基づき以下に説明する。   Embodiments of the present invention will be described below based on preferred embodiments of the present invention shown in the drawings.

図１は本発明の実施例に係る船外機の側面図，図２は図１の要部拡大断面図，図３は図２の３−３線断面図，図４は図３の４−４線断面図，図５はガスケットの平面図，図６は図２の６部拡大図，図７はエンジンの潤滑装置の流路図である。   1 is a side view of an outboard motor according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1, FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 4 is a sectional view of FIG. 5, FIG. 5 is a plan view of the gasket, FIG. 6 is an enlarged view of a portion 6 of FIG. 2, and FIG.

図１において，船外機Ｏでは，スターンブラケット８側を前，それと反対側を後ろという。船外機Ｏのケーシング１は，上部に水冷多気筒４ストローク式エンジンＥを搭載し，プロペラ２を後端に備えるプロペラ軸３を下部で支持する。このケーシング１の直前には，アッパアーム４及びロアアーム５を介してケーシング１に取り付けられる鉛直方向のスイベル軸６が配設され，このスイベル軸６を回転自在に支持するスイベルケース７は，船体のトランサムＢｔにクランプされるスターンブラケット８に水平方向のチルト軸９を介して連結される。したがって，ケーシング１は，スイベル軸６周りに左右操向が可能であり，またチルト軸９周りに上下チルトが可能である。   In FIG. 1, in the outboard motor O, the stern bracket 8 side is referred to as the front, and the opposite side is referred to as the rear. The casing 1 of the outboard motor O is equipped with a water-cooled multi-cylinder four-stroke engine E at the top and supports a propeller shaft 3 having a propeller 2 at the rear end at the bottom. Immediately before the casing 1, a vertical swivel shaft 6 attached to the casing 1 via an upper arm 4 and a lower arm 5 is disposed. It is connected to a stern bracket 8 clamped to Bt via a tilt shaft 9 in the horizontal direction. Therefore, the casing 1 can be steered left and right around the swivel shaft 6 and can be tilted up and down around the tilt shaft 9.

ケーシング１の上端には，エンジンＥを覆うエンジンフード１０が着脱可能に取り付けられる。このエンジンフード１０の上部後端に空気取り入れ口１１が設けられ，エンジンフード１０内の前部に吸気チャンバ１２及びスロットルボディ１３が配設される。   An engine hood 10 that covers the engine E is detachably attached to the upper end of the casing 1. An air intake 11 is provided at the upper rear end of the engine hood 10, and an intake chamber 12 and a throttle body 13 are disposed at the front of the engine hood 10.

上記ケーシング１は，エクステンションケース１５と，このエクステンションケース１５の上端にボルト結合されるマウントケース１６と，エクステンションケース１５の下端にボルト結合されるギヤケース１７とよりなっている。またエクステンションケース１５は，アッパケース１５ａと，これにボルト結合されるロアケース１５ｂとで構成され，そのアッパケース１５ａの上端面には，マウントケース１６がガスケット１８を挟んでボルト結合される。このマウントケース１６上にエンジンＥが，そのクランク軸２０を鉛直方向に向け且つシリンダブロック１４を後方に向けて搭載され，クランク軸２０に連結される出力軸２１がエクステンションケース１５に縦置きに配置される。またクランク軸２０の下端部には，図示しない始動装置により駆動されるリングギヤ２２が固着される。   The casing 1 includes an extension case 15, a mount case 16 that is bolted to the upper end of the extension case 15, and a gear case 17 that is bolted to the lower end of the extension case 15. The extension case 15 includes an upper case 15a and a lower case 15b coupled to the upper case 15a. A mount case 16 is bolted to the upper end surface of the upper case 15a with a gasket 18 interposed therebetween. The engine E is mounted on the mount case 16 with the crankshaft 20 oriented vertically and the cylinder block 14 directed rearward, and an output shaft 21 connected to the crankshaft 20 is arranged vertically on the extension case 15. Is done. A ring gear 22 driven by a starter (not shown) is fixed to the lower end portion of the crankshaft 20.

ギヤケース１７には，後方外端にプロペラ２を付設する前記プロペラ軸３が水平に支持されると共に，このプロペラ軸３に前記出力軸２１を連結する前後進切換ギヤ機構２３が収容される。   The gear case 17 horizontally supports the propeller shaft 3 provided with the propeller 2 at the rear outer end, and accommodates a forward / reverse switching gear mechanism 23 for connecting the output shaft 21 to the propeller shaft 3.

而して，エンジンＥの作動中，その動力は，クランク軸２０から出力軸２１に，更に前後進切換ギヤ機構２３を介してプロペラ軸３に伝達され，プロペラ２を駆動する。その際，プロペラ２の回転方向は，前後進切換ギヤ機構２３により切り換え制御される。   Thus, during operation of the engine E, the power is transmitted from the crankshaft 20 to the output shaft 21 and further to the propeller shaft 3 via the forward / reverse switching gear mechanism 23 to drive the propeller 2. At that time, the rotation direction of the propeller 2 is controlled by the forward / reverse switching gear mechanism 23.

図２及び図３において，エクステンションケース１５のアッパケース１５ａには，その前過半部を占めるオイルパン２５と，このオイルパン２５の後部一半部に隣接する冷却水出口室２７と，オイルパン２５の後部他半部に隣接するアイドル排気室５０とが一体に形成される。またアッパケース１５ａの中央部には冷却室入口室２６が，オイルパン２５と冷却水出口室２７との間に入り込むように一体に形成され，さらに冷却水入口室２６の中心部には，排気通路２８が冷却水入口室２６を上下に貫通するように一体に形成される。前記アイドル排気室５０は，半径方向内側の第１室５０ａと，その外側の第２室５０ｂとに区画されると共に，両室５０ａ，５０ｂは下部の連通孔５４で相互に連通している。また第１室５０ａは前記排気通路２８の中間部に図示しない通路を介して連通し，第２室５０ｂは，マウントケース１６の後端部に取り付けられるアイドル排気管５６に連通される。したがって，エンジンＥのアイドリング時には，排気通路２８の下端が水面下に没していても，エンジンＥの排ガスを，排気通路２８の途中からアイドル排気室５０を経てアイドル排気管５６よりスムーズに排出することができる。   2 and 3, the upper case 15a of the extension case 15 includes an oil pan 25 occupying the front majority, a cooling water outlet chamber 27 adjacent to the rear half of the oil pan 25, and the oil pan 25. An idle exhaust chamber 50 adjacent to the rear other half is integrally formed. A cooling chamber inlet chamber 26 is integrally formed at the center of the upper case 15a so as to enter between the oil pan 25 and the cooling water outlet chamber 27. Further, an exhaust gas is provided at the center of the cooling water inlet chamber 26. The passage 28 is integrally formed so as to penetrate the cooling water inlet chamber 26 vertically. The idle exhaust chamber 50 is partitioned into a first chamber 50a on the radially inner side and a second chamber 50b on the outer side thereof, and the two chambers 50a and 50b communicate with each other through a lower communication hole 54. The first chamber 50a communicates with an intermediate portion of the exhaust passage 28 via a passage (not shown), and the second chamber 50b communicates with an idle exhaust pipe 56 attached to the rear end portion of the mount case 16. Therefore, when the engine E is idling, even if the lower end of the exhaust passage 28 is submerged below the water surface, the exhaust gas of the engine E is smoothly discharged from the idle exhaust pipe 56 through the idle exhaust chamber 50 in the middle of the exhaust passage 28. be able to.

こゝで，上記オイルパン２５を含むエンジンＥの潤滑装置について，図２〜図７を参照しながら説明する。   Now, a lubricating device for the engine E including the oil pan 25 will be described with reference to FIGS.

図２に示すように，シリンダブロック１４の後端に接合されるシリンダヘッド１９には，クランク軸２０からエンジンＥ上部の調時伝動装置２９を介して１／２の減速比で駆動される動弁用のカム軸３０がクランク軸２０と平行する姿勢で支承されており，このカム軸３０により駆動されるオイルポンプ３１がシリンダヘッド１９の下端部に取り付けられる。このオイルポンプ３１の吸入ポートとオイルパン２５との間に，オイルパン２５内のオイル３２をオイルポンプ３１に誘導する吸い上げ油路３３が設けられる。   As shown in FIG. 2, the cylinder head 19 joined to the rear end of the cylinder block 14 is driven at a reduction ratio of ½ from the crankshaft 20 through a timing transmission device 29 above the engine E. A valve camshaft 30 is supported in a posture parallel to the crankshaft 20, and an oil pump 31 driven by the camshaft 30 is attached to the lower end portion of the cylinder head 19. A suction oil passage 33 that guides the oil 32 in the oil pan 25 to the oil pump 31 is provided between the suction port of the oil pump 31 and the oil pan 25.

この吸い上げ油路３３は，オイルパン２５とマウントケース１６との接合面で分割される上流油路３３ａと下流油路３３ｂとで構成され，これら上流油路３３ａ及び下流油路３３ｂの対向部に，ステンレス製の濾網３４がストレーナとして挟み込み込まれる。   The suction oil passage 33 is composed of an upstream oil passage 33a and a downstream oil passage 33b which are divided at the joint surface between the oil pan 25 and the mount case 16, and is disposed at a portion opposite to the upstream oil passage 33a and the downstream oil passage 33b. , Stainless steel filter mesh 34 is inserted as a strainer.

吸い上げ油路３３の上流油路３３ａは，オイルパン２５の一側壁に一体に形成され，それの，オイルパン２５内の底部に開口する上流端３５は，オイルパン２５の上方開放面から斜めに進入させる回転工具３６により穿設される。こうすることで上流端３５の加工後，閉じ栓を施す必要がなくなる。   The upstream oil passage 33 a of the suction oil passage 33 is formed integrally with one side wall of the oil pan 25, and an upstream end 35 that opens at the bottom of the oil pan 25 is inclined from the upper open surface of the oil pan 25. Drilled by the rotating tool 36 to be entered. This eliminates the need for a closing plug after processing the upstream end 35.

下流油路３３ｂは，マウントケース１６からシリンダブロック１４及びシリンダヘッド１９に亙り一体に形成されてオイルポンプ３１の吸入ポートに至る。   The downstream oil passage 33 b is formed integrally from the mount case 16 to the cylinder block 14 and the cylinder head 19 and reaches the suction port of the oil pump 31.

図２，図５及び図６に示すように，アッパケース１５ａとマウントケース１６との接合面間に介装される前記ガスケット１８はステンレス製であって，オイルパン２５とマウントケース１６との接合面間まで延びており，前記吸い上げ油路３３に対応する部分が開口部３７となっている。一方，前記濾網３４は，オイルパン２５の上端面から上流油路３３ａに受容される膨出部３４ａと，この膨出部３４ａの上端から半径方向に張り出す接合フランジ３４ｂとからなっており，その接合フランジ３４ｂがガスケット１８の上記開口部３７周辺に溶接される。こうして濾網３４はガスケット１８に一体に連設される。   As shown in FIGS. 2, 5, and 6, the gasket 18 interposed between the joint surfaces of the upper case 15a and the mount case 16 is made of stainless steel, and the oil pan 25 and the mount case 16 are joined. The portion extends to the surface, and a portion corresponding to the suction oil passage 33 is an opening 37. On the other hand, the filter net 34 is composed of a bulging portion 34a received in the upstream oil passage 33a from the upper end surface of the oil pan 25, and a joining flange 34b projecting radially from the upper end of the bulging portion 34a. The joint flange 34b is welded around the opening 37 of the gasket 18. Thus, the filter net 34 is integrally connected to the gasket 18.

図７に示すように，オイルポンプ３１の吐出ポートには，エンジンＥのクランク軸２０周りの第１潤滑部３９，カム軸３０周りの第２潤滑部４０及び調時伝動装置２９周りの第３潤滑部４１にオイル３２を供給する供給油路３８が接続され，この供給油路３８の上流側には，オイルフィルタ４３と，リリーフ弁４４が設けられる。   As shown in FIG. 7, the discharge port of the oil pump 31 includes a first lubrication portion 39 around the crankshaft 20 of the engine E, a second lubrication portion 40 around the camshaft 30, and a third around the timing transmission device 29. A supply oil passage 38 for supplying the oil 32 is connected to the lubricating portion 41, and an oil filter 43 and a relief valve 44 are provided on the upstream side of the supply oil passage 38.

而して，エンジンＥの運転中，カム軸３０から駆動されるオイルポンプ３１は，オイルパン２５内のオイル３２を，吸い上げ油路３３を通して吸い上げて，供給油路３８に吐出することにより，そのオイル３２を第１〜第３潤滑部３９〜４１に供給し，クランク軸２０，カム軸３０及び調時伝動装置２９等を潤滑する。これらの潤滑を終えたオイルは重力によりオイルパン２５に還流する。   Thus, during operation of the engine E, the oil pump 31 driven from the camshaft 30 sucks up the oil 32 in the oil pan 25 through the suction oil passage 33 and discharges it to the supply oil passage 38. Oil 32 is supplied to the first to third lubrication parts 39 to 41 to lubricate the crankshaft 20, the camshaft 30, the timing transmission device 29, and the like. The oil that has been lubricated returns to the oil pan 25 by gravity.

この間，吸い上げ油路３３では，オイルポンプ３１に向かうオイル３２を濾網３４が濾過し，供給油路３８では，第１〜第３潤滑部３９〜４１に向かうオイル３２をオイルフィルタ４３が更に濾過する。   During this time, in the suction oil passage 33, the filter 32 filters the oil 32 going to the oil pump 31, and in the supply oil passage 38, the oil filter 43 further filters the oil 32 going to the first to third lubrication parts 39 to 41. To do.

ところで，ストレーナ機能を発揮する上記濾網３４は，上流油路３３ａ及び下流油路３３ｂ間に挟まれるので，従来のストレーナのようなストレーナケースを必要とせず，潤滑装置の軽量化に寄与し得る。   By the way, the filter net 34 that exhibits the strainer function is sandwiched between the upstream oil passage 33a and the downstream oil passage 33b, so that it does not require a strainer case like a conventional strainer and can contribute to weight reduction of the lubricating device. .

特に，濾網３４は，オイルパン２５及びマウントケース１６間に介装されるガスケット１８に一体に連設されるので，濾網３４の支持構造が簡単且つ確実であり，潤滑装置のコスト低減に寄与し得る。   In particular, since the filter screen 34 is integrally connected to the gasket 18 interposed between the oil pan 25 and the mount case 16, the support structure of the filter screen 34 is simple and reliable, and the cost of the lubrication apparatus is reduced. Can contribute.

また吸い上げ油路の上流油路３３ａは，オイルパン２５の側壁に一体に形成されるので，従来のように吸い上げ管を支持するステーは不要となり，これも潤滑装置の軽量化に寄与する。   Further, since the upstream oil passage 33a of the suction oil passage is formed integrally with the side wall of the oil pan 25, a stay for supporting the suction pipe as in the prior art becomes unnecessary, which also contributes to the weight reduction of the lubricating device.

次に，前記冷却水入口室２６及び冷却水出口室２７を含む，エンジンＥの冷却装置について図１〜図４を参照しながら説明する。   Next, a cooling device for the engine E including the cooling water inlet chamber 26 and the cooling water outlet chamber 27 will be described with reference to FIGS.

図１において，ギヤケース１７の一側壁には，外水を冷却水として取り入れる取水口５１が設けられる。一方，図２に示すように，前記冷却水入口室２６の底壁は摺鉢状になっており，その最下部に接続口２６ａが設け，上記取水口５１と接続口２６ａとの間を接続する吸水管５２がエクステンションケース１５内に配置され，この吸水管５２の途中に，前記出力軸２１により駆動される水ポンプ５３が介裝され，取水口５１から取り入れた水を冷却水入口室２６に圧送するようになっている。   In FIG. 1, a water intake 51 for taking outside water as cooling water is provided on one side wall of the gear case 17. On the other hand, as shown in FIG. 2, the bottom wall of the cooling water inlet chamber 26 is shaped like a mortar, and a connection port 26a is provided at the lowermost part to connect the water intake port 51 and the connection port 26a. A water absorption pipe 52 is disposed in the extension case 15. A water pump 53 driven by the output shaft 21 is interposed in the water absorption pipe 52, and the water taken in from the water intake 51 is supplied to the cooling water inlet chamber 26. It is supposed to be pumped to.

冷却水入口室２６は，エンジンＥの図示しない水ジャケットの入口に連通していて，水ポンプ５３から圧送された冷却水を水ジャケットに誘導する。上記水ジャケットを通りながらエンジンＥを冷却し終えた冷却水は冷却水出口室２７に移る。この冷却水出口室２７に移った冷却水は，冷却水出口室２７底壁の排水孔２７ａを通してエクステンションケース１５内に放出される。   The cooling water inlet chamber 26 communicates with an inlet of a water jacket (not shown) of the engine E, and guides the cooling water pumped from the water pump 53 to the water jacket. The cooling water that has finished cooling the engine E while passing through the water jacket moves to the cooling water outlet chamber 27. The cooling water transferred to the cooling water outlet chamber 27 is discharged into the extension case 15 through the drain hole 27a in the bottom wall of the cooling water outlet chamber 27.

冷却水入口室２６の中心部を貫通した前記排気通路２８の下流端もエクステンションケース１５内に開放されているので，上記冷却水は，排気通路２８から排出した排ガスと共に，プロペラ２の中心部に設けられる通孔から外部に排出される。   Since the downstream end of the exhaust passage 28 penetrating through the central portion of the cooling water inlet chamber 26 is also opened in the extension case 15, the cooling water enters the central portion of the propeller 2 together with the exhaust gas discharged from the exhaust passage 28. It is discharged to the outside from the provided through hole.

尚，前記接続口２６ａは，これを冷却水入口室２６の底部において前側に配置すれば，エンジンＥの運転停止後，船外機Ｏを前方へのチルトアップ状態にしたとき，冷却水入口室２６の残留水の接続口２６ａへの流出を，より確実にすることができる。   If the connecting port 26a is arranged on the front side at the bottom of the cooling water inlet chamber 26, the cooling water inlet chamber is set when the outboard motor O is tilted forward after the operation of the engine E is stopped. The remaining water can be more reliably discharged to the connection port 26a.

上記冷却水入口室２６，オイルパン２５及び吸い上げ油路３３の上流油路３３ａは，エクステンションケース１５のアッパケース１５ａに一体に形成されると共に，冷却水入口室２６と上流油路３３ａとは，アッパケース１５ａと一体の共通の隔壁１６ａを挟んで隣接するように配置される。   The cooling water inlet chamber 26, the oil pan 25, and the upstream oil passage 33a of the suction oil passage 33 are formed integrally with the upper case 15a of the extension case 15, and the cooling water inlet chamber 26 and the upstream oil passage 33a are It arrange | positions so that it may adjoin on both sides of the common partition 16a integral with the upper case 15a.

而して，冷却水入口室２６の冷却水は，オイルパン２５を出てオイルポンプ３１に吸い上げられる限られた流量のオイルを冷却することになるから，そのオイルの冷却効率を高めると共に，その冷却したオイルにより，エンジンＥの第１〜第３潤滑部３９〜４１の潤滑みならず冷却を行うことができ，エンジンＥの耐久性向上に寄与し得る。   Thus, the cooling water in the cooling water inlet chamber 26 cools the oil at a limited flow rate that comes out of the oil pan 25 and is sucked into the oil pump 31. The cooled oil can cool the first to third lubrication portions 39 to 41 of the engine E as well as lubrication, and can contribute to improving the durability of the engine E.

その際，オイルパン２５，吸い上げ油路３３の上流油路３３ａ，冷却水入口室３３ａ，並びに上流油路３３ａ及び冷却水入口室３３ａ間の共通隔壁５５を，エクステンションケース１５のアッパケース１５ａに一体に形成したことで，上流油路３３ａ及び一部の水路の配管や，それらを支持するステーが不要となり，潤滑装置の簡素化及び軽量化，延いては船外機Ｏの簡素化及び軽量化を図ることができ，しかもオイルパン２５及び上流油路３３ａからエクステンションケース１５への放熱により，オイルの冷却を一層促進することができる。   At that time, the oil pan 25, the upstream oil passage 33a of the suction oil passage 33, the cooling water inlet chamber 33a, and the common partition wall 55 between the upstream oil passage 33a and the cooling water inlet chamber 33a are integrated with the upper case 15a of the extension case 15. This eliminates the need for piping in the upstream oil passage 33a and some of the water passages and stays for supporting them, simplifying and reducing the weight of the lubrication device, and simplifying and reducing the weight of the outboard motor O. In addition, the cooling of the oil can be further promoted by the heat radiation from the oil pan 25 and the upstream oil passage 33a to the extension case 15.

本発明は上記実施例に限定されるものではなく，その要旨を逸脱しない範囲で種々の設計変更が可能である。   The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention.

本発明の実施例に係る船外機の側面図。The side view of the outboard motor which concerns on the Example of this invention. 図１の要部拡大断面図。The principal part expanded sectional view of FIG. 図２の３−３線断面図。FIG. 3 is a sectional view taken along line 3-3 in FIG. 2. 図３の４−４線断面図。FIG. 4 is a sectional view taken along line 4-4 of FIG. ガスケットの平面図。The top view of a gasket. 図２の６部拡大図。FIG. 6 is an enlarged view of 6 parts in FIG. 2. エンジンの潤滑装置の流路図。FIG. 3 is a flow chart of an engine lubrication device.

符号の説明Explanation of symbols

Ｅ・・・・・・エンジン
１６・・・・・ケース部材（マウントケース）
１８・・・・・ガスケット
２５・・・・・オイルパン
３１・・・・・オイルポンプ
３２・・・・・オイル
３３・・・・・吸い上げ油路
３３ａ・・・・上流油路
３３ｂ・・・・下流油路
３４・・・・・濾網
３８・・・・・供給油路
３９〜４１・・・潤滑部 E .... Engine 16 ... Case material (mounting case)
18. Gasket 25 ... Oil pan 31 ... Oil pump 32 ... Oil 33 ... Suction oil passage 33a ... Upstream oil passage 33b ... ..Downstream oil passage 34 ... Filter net 38 ... Supply oil passage 39 to 41 ... Lubrication part

Claims (3)

エンジン（Ｅ）の下部に配置されて潤滑オイル（３２）を貯留するオイルパン（２５）と，このオイルパン（２５）の上方に配置されてエンジン（Ｅ）により駆動されるオイルポンプ（３１）と，オイルパン（２５）内のオイル（３２）をオイルポンプ（３１）の吸入ポートに誘導する吸い上げ油路（３３）と，オイルポンプ（３１）の吐出ポートから吐出されるオイルをエンジン（Ｅ）の潤滑部（３９〜４１）に誘導する供給油路（３８）と，オイルポンプ（３１）がオイルパン（２５）から吸い上げるオイル（３２）を濾過するストレーナとを備える，エンジンの潤滑装置において，
前記吸い上げ油路（３３）を，オイルパン（２５）側の上流油路（３３ａ）と，オイルポンプ（３１）側の下流油路（３３ｂ）とに分割し，これら上流油路（３３ａ）及び下流油路（３３ｂ）間に，ストレーナとしての濾網（２４）を挟み込んだことを特徴とする，エンジンの潤滑装置。 An oil pan (25) disposed under the engine (E) and storing lubricating oil (32), and an oil pump (31) disposed above the oil pan (25) and driven by the engine (E) A suction oil passage (33) for guiding the oil (32) in the oil pan (25) to the suction port of the oil pump (31), and the oil discharged from the discharge port of the oil pump (31) as engine (E In a lubricating device for an engine, comprising a supply oil passage (38) that leads to a lubricating portion (39 to 41) of the above and a strainer that filters oil (32) that the oil pump (31) sucks up from the oil pan (25). ,
The suction oil passage (33) is divided into an upstream oil passage (33a) on the oil pan (25) side and a downstream oil passage (33b) on the oil pump (31) side, and these upstream oil passage (33a) and An engine lubrication device, wherein a filter net (24) as a strainer is sandwiched between downstream oil passages (33b). 請求項１記載のエンジンの潤滑装置において，
前記上流油路（３３ａ）をオイルパン（２５）の側壁に一体に形成したことを特徴とする，エンジンの潤滑装置。 The engine lubrication device according to claim 1,
An engine lubrication device, wherein the upstream oil passage (33a) is formed integrally with a side wall of an oil pan (25). 請求項２記載のエンジンの潤滑装置において，
オイルパン（２５）の上端面にガスケット（１８）を介して接合してそれを支持するケース部材（１６）に前記下流油路（３３ｂ）を設け，前記ガスケット（１８）に前記濾網（２４）を連設したことを特徴とする，エンジンの潤滑装置。 The engine lubrication device according to claim 2,
The downstream oil passage (33b) is provided in a case member (16) which is joined to and supports the upper end surface of the oil pan (25) via a gasket (18), and the filter net (24) is provided in the gasket (18). ), A lubrication system for engines.
JP2006269346A 2006-09-29 2006-09-29 Lubricating device for engine Pending JP2008088865A (en)

Priority Applications (2)

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JP2006269346A JP2008088865A (en) 2006-09-29 2006-09-29 Lubricating device for engine
US11/902,702 US7571705B2 (en) 2006-09-29 2007-09-25 Lubrication device for engine and outboard engine system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012197691A (en) * 2011-03-18 2012-10-18 Honda Motor Co Ltd Oil path structure of engine

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Publication number Priority date Publication date Assignee Title
JPH06336911A (en) * 1993-05-27 1994-12-06 Toyota Autom Loom Works Ltd Lubricating oil separating device and gasket therewith
JP2002081307A (en) * 2000-07-04 2002-03-22 Suzuki Motor Corp Oil filter structure and oil filter gasket
JP2002276385A (en) * 2001-03-22 2002-09-25 Honda Motor Co Ltd Reciprocating internal combustion engine equipped with hydraulic tensioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06336911A (en) * 1993-05-27 1994-12-06 Toyota Autom Loom Works Ltd Lubricating oil separating device and gasket therewith
JP2002081307A (en) * 2000-07-04 2002-03-22 Suzuki Motor Corp Oil filter structure and oil filter gasket
JP2002276385A (en) * 2001-03-22 2002-09-25 Honda Motor Co Ltd Reciprocating internal combustion engine equipped with hydraulic tensioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012197691A (en) * 2011-03-18 2012-10-18 Honda Motor Co Ltd Oil path structure of engine

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