JPH03281910A - Lubricator for two-stroke engine - Google Patents

Lubricator for two-stroke engine

Info

Publication number
JPH03281910A
JPH03281910A JP7901690A JP7901690A JPH03281910A JP H03281910 A JPH03281910 A JP H03281910A JP 7901690 A JP7901690 A JP 7901690A JP 7901690 A JP7901690 A JP 7901690A JP H03281910 A JPH03281910 A JP H03281910A
Authority
JP
Japan
Prior art keywords
rib
cylinder
lubricating oil
polishing
exhaust port
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
JP7901690A
Other languages
Japanese (ja)
Inventor
Yoichi Nakayama
洋一 中山
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.)
Suzuki Motor Corp
Original Assignee
Suzuki Motor Corp
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 Suzuki Motor Corp filed Critical Suzuki Motor Corp
Priority to JP7901690A priority Critical patent/JPH03281910A/en
Publication of JPH03281910A publication Critical patent/JPH03281910A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/04—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture for upper cylinder lubrication only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • 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
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity

Abstract

PURPOSE:To supply lubricating oil to a rib so as to prevent any generation of scarfing and cylinder noise by providing a polishing portion having a depth of several tens microns in the vicinity of the rib disposed along the axial direction of a cylinder, and forming a pressure-feed hole for the lubricating oil in the lower portion and inside of the polishing portion. CONSTITUTION:A cylinder 1 of a two-stroke engine comprises an exhaust port 2 and a scavenging port 3. In order to enlarge a lateral width, the exhaust port 2 is provided in the center thereof with a rib 4 for dividing the exhaust port 2 into right and left parts. Because of large thermal expansion due to exposure to exhaust heat, a polishing portion 5 is disposed in the vicinity of the rib 4, which is polished to a depth of several tens microns. A pressure-feed hole 6 for feeding lubricating oil little by little under pressure by means of an oil pump is opened to a wall surface of the cylinder 1 in the lower portion of the rib 4. The lower end of the polishing portion 5 extends down to a position to be connected to the pressure-feed hole 6. Accordingly, the lubricating oil is fed from the pressure-feed hole 6 to lubricate the polishing portion 5 of the rib 4. Therefore, any generation of scarfing can be prevented despite a small polishing margin of the polishing portion 5 of the rib 4, and further, any generation of noise of the cylinder can be prevented.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、ニサイクルエンジンの潤滑装置に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a lubrication device for a two-cycle engine.

〔従来の技術〕[Conventional technology]

ニサイクルエンジンは、出力向上のためには、排気ポー
トを大きくする必要がある。排気ポートの幅を広げると
ピストンやピストンリングが突込み易くなるため、排気
ポートの中央に、排気ポートを左右に分けるようにリブ
を設けている。リブは、排気熱に曝されて膨張するので
、ピストンのスカフィングなどの原因になる。このため
、リブの付近を数十ミクロンの深さに研摩して、ピスト
ンとの隙間を広げ、スカフィングなどを生じないように
している。更に高出力化のためには、排気ポートがより
大きくなり、リブが受ける熱影響が大きくなり、研摩深
さを深くする必要がある。Ni-cycle engines require larger exhaust ports in order to improve output. If the width of the exhaust port is widened, the piston and piston ring will easily penetrate into it, so a rib is provided in the center of the exhaust port to divide it into left and right sides. The ribs expand when exposed to exhaust heat, which causes piston scuffing. For this reason, the area around the ribs is ground to a depth of several tens of microns to widen the gap with the piston and prevent scuffing. In order to further increase the output, the exhaust port becomes larger, the thermal influence on the ribs increases, and the polishing depth needs to be increased.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

リブの付近の研摩代を深くすると、スカフィングの防止
にはよいが、ピストンの首振りが発生するようになり、
シリンダーの打音が発生するようになる不都合がある。Increasing the polishing allowance near the ribs is good for preventing scuffing, but it also causes the piston to oscillate.
There is an inconvenience that the cylinder makes a banging sound.

この発明は、かかる点に鑑み、排気ポート中央のリブ付
近の研摩部の研摩代を数十ミクロンに止め、潤滑オイル
をリブに供給して、スカフィングを防止すると共に、シ
リンダ音の発生も防止できるニサイクルエンジンの潤滑
装置を得ることを目的とする。In view of these points, this invention limits the polishing allowance of the polishing part near the rib at the center of the exhaust port to several tens of microns, supplies lubricating oil to the rib, and prevents scuffing as well as the generation of cylinder noise. The purpose is to obtain a lubrication system for two-cycle engines.

〔課題を解決するだめの手段〕[Failure to solve the problem]

上記目的を達成するために、この発明のニサイクルエン
ジンの潤滑装置は、シリンダーの排気ポートの中央にリ
ブを設けるもので、リブの付近を数十ミクロンの深さで
研摩する研摩部を設け、リブの下側のシリンダー壁に潤
滑オイルの圧送孔を開口し、研摩部の下端を圧送孔まで
接続するか、研摩部と圧送孔を溝で接続するようにした
ことにある。そして、シリンダーの排気ポートの中央に
リブを設けるもので、ピストンのトップリングと第二リ
ングの溝の間で、リブに面する位置にオイルポールを設
けるようにしたことにある。In order to achieve the above object, the lubrication device for a two-cycle engine of the present invention is provided with a rib in the center of the exhaust port of the cylinder, and a polishing part that polishes the vicinity of the rib to a depth of several tens of microns. A lubricating oil pumping hole is opened in the cylinder wall below the rib, and the lower end of the abrasive part is connected to the pumping hole, or the abrasive part and the pumping hole are connected by a groove. A rib is provided at the center of the exhaust port of the cylinder, and an oil pole is provided at a position facing the rib between the grooves of the top ring and the second ring of the piston.

〔作用〕 排気ポートの中央のリブは、研摩部に、潤滑オイルの圧
送孔から流出した潤滑オイルが流れる。[Operation] The central rib of the exhaust port allows lubricating oil flowing out from the lubricating oil pumping hole to flow into the polished portion.

又、ピストンに設けたオイルホールに溜った潤滑オイル
が、ピストンの往復動てオイルホールがリブに沿って摺
動するので、潤滑オイルがリブに供給される。これによ
って、リブ付近の研摩部の研摩代を数十ミクロンに止め
ても、スカフィングが防止でき、シリンダー音の発生も
防止できる。Further, the lubricating oil accumulated in the oil hole provided in the piston is supplied to the rib because the oil hole slides along the rib as the piston reciprocates. As a result, scuffing can be prevented and cylinder noise can also be prevented even if the polishing allowance of the polishing portion near the ribs is limited to several tens of microns.

〔実施例〕〔Example〕

以下、本発明の実施例を図面によって説明する。 Embodiments of the present invention will be described below with reference to the drawings.

第１図及び第２図は本発明の一実施例を示すものである
。1 and 2 show one embodiment of the present invention.

ニサイクルエンジンのシリンダー１は、排気ポート２や
掃気ポート３が設けられる。排気ポート２は、左右幅を
広げるために、中央にリブ４を設けて、リブ４で排気ポ
ート２を左右に分ける形状にしである。リブ４は、排気
熱に曝されて熱膨張が大きいので、リブ４の付近に研摩
部５を設けて、数十ミクロンの深さに研摩する。そして
、リブ４の下側のシリンダー１の壁面に、オイルポンプ
で潤滑オイルを微量ずつ圧送する圧送孔６を開口する。A cylinder 1 of a two-cycle engine is provided with an exhaust port 2 and a scavenging port 3. The exhaust port 2 has a shape in which a rib 4 is provided in the center and the rib 4 divides the exhaust port 2 into left and right sides in order to widen the left and right width. Since the ribs 4 undergo large thermal expansion when exposed to exhaust heat, a polishing section 5 is provided near the ribs 4 and polished to a depth of several tens of microns. Then, a pressure feeding hole 6 is opened in the wall surface of the cylinder 1 below the rib 4, through which lubricating oil is pumped little by little by an oil pump.

研摩部５の下端は、圧送孔６に接続する位置まで延しで
ある。The lower end of the polishing section 5 extends to a position where it connects to the pumping hole 6.

第３図は本発明の他の実施例を示すものである。FIG. 3 shows another embodiment of the invention.

この場合には、排気ポート２の中央のリブ４付近に研摩
部５を設け、研摩部５の下端を、潤滑オイルの圧送孔６
の上側で止め、圧送孔６と研摩部５を溝７で接続しであ
る。圧送孔６から流出する潤滑オイルは、排気ポート２
のリブ４付近の研摩部５に流れて潤滑するので、研摩部
５の研摩代を少くしても、スカフィングが防止でき、シ
リンダー音の発生を防止できる。In this case, a polished part 5 is provided near the central rib 4 of the exhaust port 2, and the lower end of the polished part 5 is connected to the lubricating oil pumping hole 6.
The pumping hole 6 and the polishing part 5 are connected by the groove 7. The lubricating oil flowing out from the pressure feed hole 6 is transferred to the exhaust port 2.
Since it flows to the polishing part 5 near the rib 4 and lubricates it, even if the polishing amount of the polishing part 5 is reduced, scuffing can be prevented and cylinder noise can be prevented from occurring.

第４図は、ピストン側に対策した本発明の他の実施例を
示すものである。この場合は、ピストン８のトップリン
グと第二リングを挿入する溝９の間で、排気ポート２の
リブ４に面する部分に、オイルホール１０を設ける。ピ
ストン８の往復動でリングが掻落す潤滑オイルがオイル
ホール１０に溜り、リブ４を潤滑できる。FIG. 4 shows another embodiment of the present invention in which measures are taken on the piston side. In this case, an oil hole 10 is provided in a portion of the exhaust port 2 facing the rib 4 between the top ring of the piston 8 and the groove 9 into which the second ring is inserted. The lubricating oil scraped off by the ring due to the reciprocating motion of the piston 8 accumulates in the oil hole 10 and can lubricate the rib 4.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明は、上述のように構成し
たので、シリンダー壁の排気ポートのリブの下側に設け
た潤滑オイルの圧送孔からリブの研摩部に潤滑オイルを
送って潤滑できる。又、ピストンのリングの溝の間に設
けたオイルホールにリングで潤滑オイルを掻落したのを
受けて、リブの研摩部に潤滑オイルを送ることができる
。これによって、リブの研摩部の研摩代が少くても、ス
カフィングの発生を防止でき、シリンダー音の発生も防
止できる。これによって、リブ付近の研摩部の研摩時間
の削減が図れる。そして、シリンダーの潤滑オイルの圧
送孔とピストンのオイルホールを併用することによって
、−層効果を高めることができる。As explained above, since the present invention is configured as described above, lubricating oil can be sent to the polished portion of the rib from the lubricating oil pumping hole provided under the rib of the exhaust port on the cylinder wall to lubricate. Further, the lubricating oil scraped off by the ring into the oil hole provided between the grooves of the piston ring can be sent to the polished portion of the rib. As a result, even if the polishing amount of the polished portion of the rib is small, scuffing can be prevented from occurring, and cylinder noise can also be prevented from occurring. As a result, the polishing time for the polishing portion near the ribs can be reduced. By using the lubricating oil feeding hole in the cylinder and the oil hole in the piston in combination, the -layer effect can be enhanced.

【図面の簡単な説明】 第１図及び第２図は本発明の一実施例を示し、第１図は
シリンダーの縦断正面図、 第２図は同縦断側面図、 第３図は本発明の他の実施例を示すシリンダーの排気ボ
ート部分の正面図、 第４図は本発明の更に他の実施例を示すピストンの縦断
側面図、 である。 １・・・シリンダー　２・・・排気ボート、４・・・リ
ブ、５・・・研摩部、６・・・圧送孔、７・・・溝、８
・・・ピストン、９・・・溝、１０・・・オイルホール
。[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a vertical front view of the cylinder, Figure 2 being a side view of the cylinder, and Figure 3 being a cross-sectional side view of the cylinder. FIG. 4 is a front view of an exhaust boat portion of a cylinder showing another embodiment, and FIG. 4 is a vertical side view of a piston showing still another embodiment of the present invention. 1... Cylinder 2... Exhaust boat, 4... Rib, 5... Polished part, 6... Pressure feed hole, 7... Groove, 8
...Piston, 9...Groove, 10...Oil hole.

Claims (1)

【特許請求の範囲】 １、シリンダの軸方向に沿ったリブを排気ポートの中央
に形成した二サイクルエンジンの前記リブ付近に数十ミ
クロンの深さの研摩部を設け、この研摩部の下方で且つ
研摩部内に潤滑オイルの圧送孔を開口したことを特徴と
する二サイクルエンジンの潤滑装置。 ２、潤滑オイルの圧送孔を研摩部の下方で且つ研摩部内
にかからない位置に設け、当該研摩部と前記圧送孔との
間に溝部を形成した請求項１記載の二サイクルエンジン
の潤滑装置。 ３、請求項１及び２記載のシリンダに用いるピストンに
トップリングの溝と第二リングの溝の間にオイルホール
を研摩部に対向させて設けたことを特徴とする二サイク
ルエンジンの潤滑装置。[Claims] 1. In a two-cycle engine in which a rib along the axial direction of the cylinder is formed in the center of the exhaust port, a polished part with a depth of several tens of microns is provided near the rib, and below this polished part. A lubricating device for a two-cycle engine, characterized in that a lubricating oil pumping hole is opened in the polishing part. 2. The lubricating device for a two-cycle engine according to claim 1, wherein the lubricating oil pumping hole is provided below the abrasive part and at a position that does not penetrate into the abrasive part, and a groove is formed between the abrasive part and the pumping hole. 3. A lubricating device for a two-cycle engine, characterized in that the piston used in the cylinder according to claims 1 and 2 is provided with an oil hole between the groove of the top ring and the groove of the second ring so as to face the polished part.
JP7901690A 1990-03-29 1990-03-29 Lubricator for two-stroke engine Pending JPH03281910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7901690A JPH03281910A (en) 1990-03-29 1990-03-29 Lubricator for two-stroke engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7901690A JPH03281910A (en) 1990-03-29 1990-03-29 Lubricator for two-stroke engine

Publications (1)

Publication Number Publication Date
JPH03281910A true JPH03281910A (en) 1991-12-12

Family

ID=13678151

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7901690A Pending JPH03281910A (en) 1990-03-29 1990-03-29 Lubricator for two-stroke engine

Country Status (1)

Country Link
JP (1) JPH03281910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109915258A (en) * 2019-02-01 2019-06-21 浙江派尼尔科技股份有限公司 A kind of separation lubrication layered scavenging two-stroke brush cutter dynamic structure and working method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109915258A (en) * 2019-02-01 2019-06-21 浙江派尼尔科技股份有限公司 A kind of separation lubrication layered scavenging two-stroke brush cutter dynamic structure and working method

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