JPH0823286B2 - Lubricator for 2-cycle engine - Google Patents
Lubricator for 2-cycle engineInfo
- Publication number
- JPH0823286B2 JPH0823286B2 JP62249032A JP24903287A JPH0823286B2 JP H0823286 B2 JPH0823286 B2 JP H0823286B2 JP 62249032 A JP62249032 A JP 62249032A JP 24903287 A JP24903287 A JP 24903287A JP H0823286 B2 JPH0823286 B2 JP H0823286B2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- oil passage
- passage
- engine
- opening
- 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
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
- 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
Description
【発明の詳細な説明】 A.発明の目的 （１） 産業上の利用分野 本発明は２サイクルエンジンの潤滑装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a lubricating device for a two-cycle engine.
（２） 従来の技術 従来、この種装置として、コンロッドの軸受装着部回
りにオイルポンプによりオイルを供給するようにしたも
のが知られている（特開昭58−53187号公報参照）。ま
た吸気ポートのみ或は吸気ポートおよび前記軸受装着部
回りの両方にオイルを供給することも行われている。(2) Conventional Technology Conventionally, as this type of device, there has been known a device in which oil is supplied around a bearing mounting portion of a connecting rod by an oil pump (see Japanese Patent Laid-Open No. 58-53187). It is also practiced to supply oil to only the intake port or both around the intake port and around the bearing mounting portion.
（３） 発明が解決しようとする問題点 しかしながら、前記従来装置はエンジン運転中、常に
オイルポンプを作動させて一定量のオイルを供給するよ
うに構成されているので、エンジンの運転状況によって
はオイル供給量が不足したり、または過剰になるといっ
た問題を惹起するおそれがある。(3) Problems to be Solved by the Invention However, since the conventional device is configured to constantly operate the oil pump to supply a constant amount of oil during engine operation, depending on the operating condition of the engine There is a risk of causing problems such as insufficient or excessive supply.
本発明は前記問題を解決し得る前記潤滑装置を提供す
ることを目的とする。An object of the present invention is to provide the above-mentioned lubrication device that can solve the above-mentioned problems.
B.発明の構成 （１） 問題点を解決するための手段 本発明は２サイクルエンジンの潤滑装置において、吸
気ポートに連通する第１オイル通路と、クランク軸の軸
受装着部回りに連通する第２オイル通路とをオイルポン
プに接続すると共に、その第２オイル通路に通路開閉弁
を介装し、その通路開閉弁には、第２オイル通路をエン
ジンの高回転高出力時に開き低回転低出力時に閉じるよ
うに開閉制御する制御機構を連結したことを特徴とす
る。B. Structure of the Invention (1) Means for Solving the Problems The present invention relates to a lubrication apparatus for a two-cycle engine, in which a first oil passage communicating with an intake port and a second oil passage communicating with a bearing mounting portion of a crankshaft are communicated with each other. The oil passage is connected to an oil pump, and a passage opening / closing valve is provided in the second oil passage. The passage opening / closing valve opens the second oil passage at a high rotation and high output of the engine at a low rotation and low output. It is characterized in that a control mechanism for controlling opening / closing so as to be closed is connected.
（２） 作用 前記構成によれば、エンジンの運転中は常にオイルポ
ンプから第１オイル通路を経て吸気ポート側へオイルが
安定供給されるが、得にクランク軸軸受部が高負荷とな
って要求オイル量が増大する、エンジンの高回転高出力
時には、オイルポンプから第２オイル通路を経てクラン
ク軸の軸受装着部へオイルが直接供給されて、クランク
軸軸受部が効率よく十分に潤滑される。一方、クランク
軸軸受部が低負荷で要求オイル量の比較的小さい、エン
ジンの低回転低出力時には、第２オイル通路が遮断され
てクランク軸の軸受部へのオイルの直接供給が断たれる
ことから、オイルの過剰供給が回避され、その過剰供給
に因るオイルの浪費や排ガスの白煙化が抑えられる。(2) Operation According to the above configuration, oil is always stably supplied from the oil pump to the intake port side through the first oil passage during operation of the engine. At the time of high engine speed and high output where the amount of oil increases, oil is directly supplied from the oil pump to the bearing mounting portion of the crankshaft through the second oil passage, and the crankshaft bearing portion is efficiently and sufficiently lubricated. On the other hand, when the crankshaft bearing has a low load and a relatively small amount of oil required, and the engine is running at low speed and low output, the second oil passage is blocked and the direct supply of oil to the crankshaft bearing is cut off. Therefore, excessive supply of oil is avoided, and waste of oil and generation of white smoke in exhaust gas due to the excessive supply are suppressed.
（３） 実 施 例 図面は、多気筒２サイクルエンジンの潤滑装置を示
し、クランクケース１と一体に設けられた各吸気胴２に
気化器３が接続管４を介して連結され、気化器３の接続
管連結筒部５および接続管４は吸気胴２の吸気ポート６
に連通する。(3) Example The drawings show a lubrication device for a multi-cylinder two-cycle engine, in which a carburetor 3 is connected to each intake cylinder 2 provided integrally with a crankcase 1 via a connecting pipe 4, and a carburetor 3 is provided. The connecting pipe connecting cylinder portion 5 and the connecting pipe 4 are connected to the intake port 6 of the intake body 2.
Communicate with
クランクケース１の各軸受ホルダ７にクランク軸８の
各クランクジャーナル９が主軸受10を介して支承され、
最外側のクランクジャーナル９の外端部に嵌合されたカ
ラー11と軸受ホルダ７内周面との間にオイルシール12が
装着される。またクランク軸８の各クランクピン13にク
ランクピン軸受14を介してコンロッド15の大端部16が連
結される。Each crank journal 9 of the crankshaft 8 is supported by each bearing holder 7 of the crankcase 1 via a main bearing 10,
An oil seal 12 is mounted between the collar 11 fitted to the outer end of the outermost crank journal 9 and the inner peripheral surface of the bearing holder 7. A large end 16 of a connecting rod 15 is connected to each crank pin 13 of the crank shaft 8 via a crank pin bearing 14.
オイルタンクＴに接続されてクランク軸８から駆動さ
れるオイルポンプ17は複数の吐出ポート181,182を有
し、それらから選択される各吐出ポート181は各気化器
３の接続管連結筒部５内に配管19を介して接続される。
これにより一連の配管19、接続管連結筒部５および接続
管４は、吸気ポート６に連通する第１オイル通路201を
形成する。An oil pump 17 connected to the oil tank T and driven by the crankshaft 8 has a plurality of discharge ports 18 1 and 18 2 , and each discharge port 18 1 selected from them is connected to a connecting pipe of each carburetor 3. It is connected to the inside of the tubular portion 5 via a pipe 19.
As a result, the series of pipes 19, the connecting pipe connecting cylinder portion 5 and the connecting pipe 4 form a first oil passage 20 1 communicating with the intake port 6.
オイルポンプ17の残りの各吐出ポート182は、クラン
クケース１、クランク軸８等に形成された通油孔（一系
統のみ示す）21および配管22を介してクランク軸８の軸
受装着部である最外側のクランクジャーナル９およびク
ランクピン13回りに連通し、したがって通油孔21および
配管22は第２オイル通路202を形成する。Each of the remaining discharge port 18 2 of the oil pump 17 is a bearing mount portion of the crank shaft 8 through the crank case 1, (only one system) oil passing hole formed on the crank shaft 8 and the like 21 and the pipe 22 communicates with the crank journal 9 and the crank pin 13 around the outermost, thus passing oil hole 21 and the pipe 22 forms a second oil passage 20 2.
前記通油孔21は次の各部よりなる。即ち、クランクケ
ース１に形成された通孔23、オイルシール12および主軸
受10間の隙間24、カラー11に形成された通孔25、クラン
クジャーナル９およびクランクアーム26に形成された通
孔27、クランクアーム26に係止された当て板28およびク
ランクアーム26間の隙間29、クランクピン13に形成され
た通孔30である。The oil passage hole 21 is composed of the following parts. That is, a through hole 23 formed in the crankcase 1, a gap 24 between the oil seal 12 and the main bearing 10, a through hole 25 formed in the collar 11, a through hole 27 formed in the crank journal 9 and the crank arm 26, A gap 29 between the contact plate 28 locked to the crank arm 26 and the crank arm 26, and a through hole 30 formed in the crank pin 13.
クランクピン13の通孔30には、クランクケース１内が
図示しないピストンにより圧縮されるとき、その通孔30
内のオイルがオイルポンプ17側へ逆流するのを阻止すべ
く、逆止弁31が備えられている。When the inside of the crankcase 1 is compressed by a piston (not shown), the through hole 30 of the crank pin 13 has a through hole 30.
A check valve 31 is provided to prevent the internal oil from flowing back to the oil pump 17 side.
複数の第２オイル通路202に、それらに共通の電磁式
通路開閉弁32が介装され、その通路開閉弁32に、それを
エンジンの運転状況に応じて開閉制御する制御機構33が
連結される。 2 a plurality of second oil passage 20, common to those of the electromagnetic type channel opening and closing valve 32 is interposed, in the channel opening and closing valve 32, the control mechanism 33 is connected to opening and closing control it in accordance with the operating conditions of the engine It
制御機構33は、エンジン回転数検出素子34、ブースト
負圧検出素子35、スロットル開度検出素子36、エンジン
温度検出素子37等からの情報を総合的に勘案して制御信
号を出力し、これにより通路開閉弁32を開閉するもの
で、エンジンの低回転低出力時においては通路開閉弁32
を閉じて各第２オイル通路202をオイルポンプ17に対し
て遮断し、一方、エンジンの高回転高出力時においては
通路開閉弁32を開いて各第２オイル通路202をオイルポ
ンプ17に連通するようになっている。The control mechanism 33 outputs a control signal by comprehensively considering information from the engine speed detection element 34, the boost negative pressure detection element 35, the throttle opening detection element 36, the engine temperature detection element 37, etc. It opens and closes the passage opening / closing valve 32. When the engine is running at low speed and low output, the passage opening / closing valve 32 is opened.
Is closed to shut off each second oil passage 20 2 from the oil pump 17, while at the time of high engine speed and high output, the passage opening / closing valve 32 is opened to connect each second oil passage 20 2 to the oil pump 17. It is designed to communicate.
図中、38は吸気ポート６に配設されたリード弁であ
る。In the figure, 38 is a reed valve arranged in the intake port 6.
前記構成において、エンジンの低回転低出力時には通
路開閉弁32が閉じているので、オイルポンプ17から吐出
されるオイルは第１オイル通路201を経て吸気ポート６
に供給され、そのオイルにより、各主軸受10、各クラン
クピン軸受14、ピストン等が潤滑される。In the above configuration, since the passage opening / closing valve 32 is closed when the engine is running at low speed and low output, the oil discharged from the oil pump 17 passes through the first oil passage 20 1 and the intake port 6
Is supplied to the main bearings 10, the crank pin bearings 14, the pistons, etc. by the oil.
一方、エンジンの高回転高出力時には通路開閉弁32が
開くので、オイルポンプ17から吐出されるオイルは第２
オイル通路202を経て最外側の主軸受10およびクランク
ピン軸受14にも供給され、そのオイルと第１オイル通路
201より供給されるオイルとにより各主軸受10、クラン
クピン軸受14、ピストン等が潤滑される。On the other hand, since the passage opening / closing valve 32 opens at high engine speed and high output, the oil discharged from the oil pump 17 is the second oil.
Through the oil passage 20 2 is also supplied to the main bearing 10 and the crank pin bearing 14 of the outermost, the oil in the first oil passage
Each main bearing 10 by the oil supplied from the 20 1, the crank pin bearing 14, piston or the like are lubricated.
このようにエンジンの運転状況に応じてオイルの供給
量を制御することによって、オイルの過不足といった事
態の発生を回避することができる。By controlling the oil supply amount according to the operating condition of the engine in this way, it is possible to avoid the occurrence of a situation such as excess or deficiency of oil.
C.発明の効果 以上のように本発明によれば、２サイクルエンジンに
おいて、吸気ポートに連なる第１オイル通路と、クラン
ク軸の軸受装着部回りに連なる第２オイル通路とをオイ
ルポンプに接続すると共に、その第２オイル通路に通路
開閉弁を介装し、その通路開閉弁には、第２オイル通路
をエンジンの高回転高出力時に開き低回転低出力時に閉
じるように開閉制御する制御機構を連結したので、エン
ジンの運転中は常にオイルポンプから第１オイル通路を
経て吸気ポート側へオイルを安定供給され、また特にク
ランク軸軸受部が高負荷となって要求オイル量が増大す
る、エンジンの高回転高出力時には、オイルポンプから
第２オイル通路を経てクランク軸の軸受装着部へオイル
が直接供給されるから、クランク軸軸受部を効率よく十
分に潤滑することができる。一方、クランク軸軸受部が
低負荷で要求オイル量の比較的小さい、エンジンの低回
転低出力時には、第２オイル通路が遮断されてクランク
軸の軸受部へのオイルの直接供給が断たれることから、
オイルの過剰供給を回避することができ、オイル節減や
排ガスの白煙化防止に寄与し得る。C. Effects of the Invention As described above, according to the present invention, in the two-cycle engine, the first oil passage connected to the intake port and the second oil passage connected around the bearing mounting portion of the crankshaft are connected to the oil pump. At the same time, a passage opening / closing valve is provided in the second oil passage, and the passage opening / closing valve is provided with a control mechanism for opening / closing the second oil passage so that the second oil passage is opened at high rotation high output and closed at low rotation low output. Since they are connected, the oil is constantly supplied from the oil pump to the intake port side through the first oil passage during the operation of the engine, and particularly, the crankshaft bearing portion has a high load and the required oil amount increases. At high rotation and high output, oil is directly supplied from the oil pump to the bearing mounting portion of the crankshaft through the second oil passage, so that the crankshaft bearing portion is efficiently and sufficiently lubricated. It can be. On the other hand, when the crankshaft bearing has a low load and a relatively small amount of oil required, and the engine is running at low speed and low output, the second oil passage is blocked and the direct supply of oil to the crankshaft bearing is cut off. From
It is possible to avoid excessive supply of oil, which can contribute to oil saving and prevention of white smoke in exhaust gas.
図面は本発明の一実施例の断面図である。 ６……吸気ポート、８……クランク軸、9,13……軸受装
着部としてのクランクジャーナル、クランクピン、17…
…オイルポンプ、201,202……第1,第２オイル通路、32
……通路開閉弁、33……制御機構The drawing is a sectional view of one embodiment of the present invention. 6 ... Intake port, 8 ... Crank shaft, 9, 13 ... Crank journal as a bearing mounting part, Crank pin, 17 ...
… Oil pump, 20 1 , 20 2 …… First and second oil passages, 32
...... Passage opening / closing valve, 33 ...... Control mechanism
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭47−4524（ＪＰ，Ｂ１) 特公 昭52−38180（ＪＰ，Ｂ２) 実公 昭52−20604（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication No. 47-4524 (JP, B1) Japanese Publication No. 52-38180 (JP, B2) Actual Publication No. 52-20604 (JP, Y2)
Claims (1)
吸気ポート（６）に連通する第１オイル通路（201）
と、クランク軸（８）の軸受装着部（9,13）回りに連通
する第２オイル通路（202）とをオイルポンプ（17）に
接続すると共に、その第２オイル通路（202）に通路開
閉弁（32）を介装し、その通路開閉弁（32）には、第２
オイル通路（202）をエンジンの高回転高出力時に開き
低回転低出力時に閉じるように開閉制御する制御機構
（33）を連結したことを特徴とする、２サイクルエンジ
ンの潤滑装置。1. A lubrication device for a two-cycle engine, comprising:
First oil passage (20 1 ) communicating with the intake port (6)
And a second oil passage (20 2 ) communicating with the bearing mounting portion (9, 13) of the crank shaft (8) are connected to the oil pump (17) and the second oil passage (20 2 ) is connected to the second oil passage (20 2 ). The passage opening / closing valve (32) is interposed, and the passage opening / closing valve (32) has a second
Characterized in that the concatenation of the control mechanism (33) for opening and closing controlled to close at low speed and outputs open the oil passage (20 2) at the time of high rotation and high output of the engine, the two-cycle engine lubricating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62249032A JPH0823286B2 (en) | 1987-10-01 | 1987-10-01 | Lubricator for 2-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62249032A JPH0823286B2 (en) | 1987-10-01 | 1987-10-01 | Lubricator for 2-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0192505A JPH0192505A (en) | 1989-04-11 |
| JPH0823286B2 true JPH0823286B2 (en) | 1996-03-06 |
Family
ID=17186989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62249032A Expired - Lifetime JPH0823286B2 (en) | 1987-10-01 | 1987-10-01 | Lubricator for 2-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0823286B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3034633B2 (en) * | 1991-04-12 | 2000-04-17 | ヤマハ発動機株式会社 | Lubricating oil supply device for two-cycle engine |
| US5251602A (en) * | 1991-04-20 | 1993-10-12 | Yamaha Hatsudoki Kabushiki Kaisha | Fuel supply system for gas-fueled engine |
| US5337722A (en) * | 1992-04-16 | 1994-08-16 | Yamaha Hatsudoki Kabushiki Kaisha | Fuel control and feed system for gas fueled engine |
| US5355851A (en) * | 1992-02-10 | 1994-10-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricating oil supplying system for two cycle engine |
| JP3124828B2 (en) * | 1992-02-15 | 2001-01-15 | ヤマハ発動機株式会社 | Lubricating oil supply device for vehicle engine |
| JP3124818B2 (en) * | 1992-02-15 | 2001-01-15 | ヤマハ発動機株式会社 | Lubricating oil supply device for vehicle engine |
| US5526783A (en) * | 1992-06-29 | 1996-06-18 | Yamaha Hatsudoki Kabushiki Kaisha | Lubricant control |
| JPH0754626A (en) * | 1993-08-09 | 1995-02-28 | Yamaha Motor Co Ltd | Lubricating device of engine |
| JPH0754628A (en) * | 1993-08-09 | 1995-02-28 | Yamaha Motor Co Ltd | Lubriicating device of cylinder fuel injection-type two-cycle engine |
| JPH07253049A (en) * | 1994-03-14 | 1995-10-03 | Yamaha Motor Co Ltd | Fuel supply device for gaseous fuel engine |
| JPH07253048A (en) * | 1994-03-15 | 1995-10-03 | Yamaha Motor Co Ltd | Air-fuel mixture forming method of gaseous fuel engine and device thereof |
| US5542387A (en) * | 1994-08-09 | 1996-08-06 | Yamaha Hatsudoki Kabushiki Kaisha | Component layout for engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220604U (en) * | 1975-07-31 | 1977-02-14 | ||
| JPS5238180A (en) * | 1975-09-19 | 1977-03-24 | Seikosha Kk | Programming means for time switches |
-
1987
- 1987-10-01 JP JP62249032A patent/JPH0823286B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0192505A (en) | 1989-04-11 |
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