JPS6220609A - Lubricating method for 2-cycle engine - Google Patents

Lubricating method for 2-cycle engine

Info

Publication number
JPS6220609A
JPS6220609A JP15689185A JP15689185A JPS6220609A JP S6220609 A JPS6220609 A JP S6220609A JP 15689185 A JP15689185 A JP 15689185A JP 15689185 A JP15689185 A JP 15689185A JP S6220609 A JPS6220609 A JP S6220609A
Authority
JP
Japan
Prior art keywords
engine
electromagnetic pump
lubricating oil
rotational speed
electric pulse
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
JP15689185A
Other languages
Japanese (ja)
Other versions
JPH0658052B2 (en
Inventor
Hajime Kishida
岸田 肇
Takeo Yoshida
武雄 吉田
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 Motor Co Ltd
Original Assignee
Yamaha Motor Co Ltd
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 Yamaha Motor Co Ltd filed Critical Yamaha Motor Co Ltd
Priority to JP15689185A priority Critical patent/JPH0658052B2/en
Publication of JPS6220609A publication Critical patent/JPS6220609A/en
Publication of JPH0658052B2 publication Critical patent/JPH0658052B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00Other engines
    • F02B75/02Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Landscapes

  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To always feed an optimum amount of lubricating oil, by a method wherein an electric pulse signal, by means of which an electromagnetic pump is driven, is generated each time the number of revolutions is increased to a given value, and the more the number of revolutions of an engine and the opening of a throttle are increased, the more the given value is decreased. CONSTITUTION:Lubricating oil in an oil tank 7 is fed to the downstream side of a carbretter 4 with the aid of an electromagnetic pump 8. An electric pulse signal, inputted to the electromagnetic pump 8, is controlled by a control device 9. In the control device 9, pulse from an ignition coil 3 is inputted to a dividing part 10, and the opening of a throttle is inputted to a dividing part 11 from a potentiometer 6. After each input signal is caused to pass a characteristics part 12, a frequency divider 13, a shaping device 14, and an amplifier 15, it is outputted as a driving signal for the electromagnetic pump 8. In which case, an electric pulse signal from the control device 9 is outputted each time an integrated amount of the number of revolutions of an engine is increased to a given value. The more the rotation speed of an engine and a throttle opening are increased, the more the given value is decreased.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は2サイクルエンジンの潤滑方法に関するもので
ある。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for lubricating a two-stroke engine.

〔従来技術〕[Prior art]

2サイクルエンジンにおける潤滑ポンプとして、電磁ポ
ンプを使用するものがある。この電磁ポンプは、電気パ
ルス信号によって1パルス毎に一定量の潤滑油を吐出す
るようにしたもので、その電気パルスは、一定サイクル
に設定されるか、またはエンジン回転数によって制御さ
れているのが普通である。
Some two-stroke engines use electromagnetic pumps as lubrication pumps. This electromagnetic pump discharges a fixed amount of lubricating oil with each pulse using an electric pulse signal, and the electric pulse is either set to a fixed cycle or controlled by the engine speed. is normal.

この場合、エンジンが要求する潤滑油量は、エンジンの
回転速度やトルクによって異なり、回転速度が高速にな
るほど、またトルクが大きくなるほど多量の潤滑油を必
要とする。このため、一般に、電磁ポンプによる潤滑油
の供給量は、潤滑不足を生じないように、量大要求量を
目安にして多めに設定されているのが普通である。
In this case, the amount of lubricating oil required by the engine varies depending on the rotational speed and torque of the engine, and the higher the rotational speed and the larger the torque, the more lubricating oil is required. For this reason, the amount of lubricating oil supplied by the electromagnetic pump is generally set to be relatively large based on the large required amount so as not to cause insufficient lubrication.

しかし、このように潤滑油の供給量が多めに設定されて
いると、潤滑油消費量を多くするだけでなく、加速時に
おいて、アイドリング時に余分に溜まった潤滑油が一度
に排気管から出るため白煙を発生する原因になりやすく
なっている。
However, if the lubricant supply amount is set too high in this way, not only will the lubricant consumption increase, but also the excess lubricant that accumulated during idling will come out of the exhaust pipe at once during acceleration. This tends to cause white smoke to be generated.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、常に最適量の潤滑油を供給可能にし、
それによって潤滑油消費量を低減すると共に、白煙の発
生を抑制することができる2サイクルエンジンの潤滑方
法を提供することにある。
The purpose of the present invention is to always be able to supply an optimal amount of lubricating oil,
It is an object of the present invention to provide a method for lubricating a two-stroke engine that can thereby reduce lubricant consumption and suppress the generation of white smoke.

〔発明の構成〕[Structure of the invention]

上記目的を達成する本発明は、電気パルス信号で駆動す
る電磁ポンプにより潤滑油を吸気系へ供給してエンジン
を潤滑する2サイクルエンジンの潤滑方法において、前
記電気パルス信号をエンジンの積算回転数が所定数にな
る毎に発生させると共に、この所定積算回転数をエンジ
ン回転速度およびスロットル開度が大であるほど小さく
設定することを特徴とするものである。
To achieve the above object, the present invention provides a two-cycle engine lubrication method in which an electromagnetic pump driven by an electric pulse signal supplies lubricating oil to the intake system to lubricate the engine. It is characterized in that it is generated every time a predetermined number is reached, and that the predetermined integrated rotational speed is set to be smaller as the engine rotational speed and throttle opening are larger.

〔実施例〕〔Example〕

以下、本発明を実施するための装置を参照して説明する
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an apparatus for carrying out the invention.

第1図において、1は本発明によって潤滑を行う自動二
輪車の2サイクルエンジンであり、2はシリンダヘッド
に取付けられた点火栓、3は点火栓2に対しエンジンの
クランク軸1回転毎に電圧を負荷する点火コイル、4は
気化器である。気化器4には不図示のスロットルが内設
され、そのスロットルは、ハンドルを兼ねるスロットル
バー5の操作によって開度が調節されるようになってい
る。このスロットルパー5の操作量、すなわちスロット
ルの開度はポテンショメータ6によって検出されるよう
になっている。
In FIG. 1, 1 is a two-stroke motorcycle engine lubricated according to the present invention, 2 is a spark plug attached to the cylinder head, and 3 is a voltage applied to the spark plug 2 every revolution of the engine crankshaft. The ignition coil to be loaded, 4, is a carburetor. A throttle (not shown) is installed inside the carburetor 4, and the opening degree of the throttle is adjusted by operating a throttle bar 5 which also serves as a handle. The amount of operation of the throttle par 5, that is, the opening degree of the throttle is detected by a potentiometer 6.

7はエンジン潤滑油を貯溜したオイルタンクで、ここか
ら潤滑油が電磁ポンプ8によって制御されながら、気化
器4の下流側へ供給されるようになっている。電磁ポン
プ8は電気パルス信号によって、1パルス毎に一定量の
吐出を行うもので、そのためエンジンの1回転当たりの
パルス数が多いほど多くの潤滑油を吐出することになる
。この電磁ポンプ8に入力する電気パルス信号は制御装
置9によって制御され、後述するようにエンジンの回転
速度およびトルクに応じて設定されたパルス数が出力さ
れるようになっている。
Reference numeral 7 denotes an oil tank storing engine lubricating oil, from which the lubricating oil is supplied to the downstream side of the carburetor 4 while being controlled by an electromagnetic pump 8. The electromagnetic pump 8 discharges a fixed amount of lubricating oil for each pulse in response to an electric pulse signal, and therefore, the greater the number of pulses per rotation of the engine, the more lubricating oil will be discharged. The electric pulse signal input to this electromagnetic pump 8 is controlled by a control device 9, and the number of pulses set according to the rotational speed and torque of the engine is output as described later.

制御装置9には、エンジン回転速度信号として点火コイ
ル3のパルスが分割部1oに入力され、またエンジンの
トルク信号としてスロットル開度がポテンショメータ6
がら分割部11に入力される。各信号は、分割部1oで
はエンジン回転速度に応じて低速、中速、高速に区分さ
れ、また分割部11では各スロットル開度毎に区分され
たのち、それぞれ特性部12に入力し、その特性部12
において各エンジン回転速度とスロットル開度に対応す
る潤滑油吐出量が決定され、その信号によって分周器1
3を操作する。
In the control device 9, the pulse of the ignition coil 3 is inputted to the dividing part 1o as an engine rotational speed signal, and the throttle opening is inputted to the potentiometer 6 as an engine torque signal.
is input to the dividing section 11. Each signal is divided into low speed, medium speed, and high speed according to the engine rotational speed in the dividing section 1o, and divided according to each throttle opening in the dividing section 11, and then inputted to the characteristic section 12 and its characteristics. Part 12
The lubricating oil discharge amount corresponding to each engine speed and throttle opening is determined in , and the frequency divider 1 is
Operate 3.

一方、分周器13には、別途エンジン回転数が積算され
、この積算回転数が上記特性部12で決められた吐出量
に対応する所定数Sになったとき電気パルスPを出力し
、かつその積算値を再びOに戻す。発生した電気パルス
信号Pは整形器14で整形されたのち、増幅器15を経
て電磁ポンプ8を駆動する。
On the other hand, the frequency divider 13 separately integrates the engine speed, and outputs an electric pulse P when this cumulative speed reaches a predetermined number S corresponding to the discharge amount determined by the characteristic section 12, and The integrated value is returned to O again. The generated electric pulse signal P is shaped by a shaper 14 and then passes through an amplifier 15 to drive the electromagnetic pump 8.

上述のように制御装置9がらの電気パルス信号Pは、エ
ンジンの回転数(すなわち、点火コイル3のパルス数)
の積算量が所定数Sに達する毎に出力される。しかも、
この所定積算回転数Sは、エンジン回転速度Rおよびス
ロットル開度θの変化に応じて異なった値に設定され、
エンジン回転速度Rおよびスロットル開度θが大きいほ
ど小さな値になる。
As mentioned above, the electric pulse signal P from the control device 9 corresponds to the engine rotation speed (i.e., the number of pulses of the ignition coil 3).
is output every time the integrated amount reaches a predetermined number S. Moreover,
This predetermined cumulative rotation speed S is set to a different value depending on changes in the engine rotation speed R and the throttle opening θ,
The larger the engine rotational speed R and the throttle opening θ are, the smaller the value becomes.

第2図は、エンジンの所定積算回転数Sとスロットル開
度θとの関係を図式的に示したもので、スロットル開度
θが1/1 (全開)のときの所定積算回転数はSI、
スロットル開度θが1/2のときの所定積算回転数は3
2、スロットル開度θが1/16のときの所定積算回転
数はS、であり、スロットル開度θが大きいほど小さく
、SI <St <Sxなる関係になっている。したが
って、スロットル開度θが1/1のとき、すなわちエン
ジンが高負荷のとき、パルスPは頻繁に発生し、電磁ポ
ンプ8からの潤滑油吐出量が多くなる。これに対しスロ
ットル開度θが1/16のとき、すなわちエンジンが低
負荷のとき、パルスPの発生頻度は少なくなり、電磁ポ
ンプ8からの潤滑油吐出量は少なくなる。
FIG. 2 diagrammatically shows the relationship between the predetermined cumulative rotational speed S of the engine and the throttle opening θ. When the throttle opening θ is 1/1 (fully open), the predetermined cumulative rotational speed is SI,
When the throttle opening θ is 1/2, the predetermined cumulative rotation speed is 3.
2. When the throttle opening degree θ is 1/16, the predetermined cumulative rotational speed is S, and the larger the throttle opening degree θ is, the smaller it is, and the relationship is SI < St < Sx. Therefore, when the throttle opening degree θ is 1/1, that is, when the engine is under high load, the pulses P occur frequently and the amount of lubricating oil discharged from the electromagnetic pump 8 increases. On the other hand, when the throttle opening degree θ is 1/16, that is, when the engine is under low load, the frequency of occurrence of pulses P decreases, and the amount of lubricating oil discharged from the electromagnetic pump 8 decreases.

上記所定積算回転数Sは、図示はしてないが、上述した
ようにエンジン回転速度Rによっても同様に特定される
Although not shown, the predetermined cumulative rotation speed S is similarly specified by the engine rotation speed R as described above.

上述したエンジン回転速度Rとスロ・ノトル開度θとの
関係を、エンシフ1回転当たりの潤滑油吐出ilQとし
てグラフに示すと第3図のように表される。すなわち、
スロットル開度θが大きくなるほど、かつエンジン回転
速度Rが高速になるほど所定積算回転数Sが小さくなり
、エンシフ1回転当たりの潤滑油吐出量Qが多くなって
いる。
The relationship between the engine rotational speed R and the slot/nottle opening θ described above is expressed in a graph as lubricant discharge ilQ per rotation of the engine shift as shown in FIG. That is,
As the throttle opening degree θ increases and as the engine rotational speed R increases, the predetermined integrated rotational speed S decreases, and the lubricating oil discharge amount Q per engine rotation increases.

上述のような電磁ポンプ8による潤滑油の吐出i1Qを
、トルク−回転速度の関係グラフ上に表すと、第4図の
Ql(少)、Qz、Q3−=−−−−、Qn(多)のよ
うに図示される。この第4図中、Tはエンジンのトルク
曲線である。
When the lubricating oil discharge i1Q by the electromagnetic pump 8 as described above is expressed on a torque-rotational speed relationship graph, Ql (small), Qz, Q3-=----, Qn (large) in Fig. 4. It is illustrated as follows. In FIG. 4, T is the engine torque curve.

また、吐出量Qをa(少) 、 −−−−−−=、  
j (多)として表示し、スロットル開度θとエンジン
回転速度Rとの関係図として表示すると、第5図のよう
に表すことができる。
Also, the discharge amount Q is a (small), -------=,
j (multiple) and as a relationship diagram between the throttle opening θ and the engine rotational speed R, it can be expressed as shown in FIG.

上述したように、本発明による潤滑方法によると、常に
エンジンの回転速度とトルクに応じた適切な量の潤滑油
を供給することができるため、潤滑油消費量を節減する
ことができると共に、また加速時における排気管からの
白煙の発生を抑制することができる。
As described above, according to the lubrication method according to the present invention, it is possible to always supply an appropriate amount of lubricating oil according to the rotational speed and torque of the engine, so it is possible to reduce lubricating oil consumption and also It is possible to suppress the generation of white smoke from the exhaust pipe during acceleration.

〔発明の効果〕〔Effect of the invention〕

上述したように本発明による2サイクルエンジンの潤滑
方法は、電気パルス信号で駆動する電磁ポンプにより潤
滑油を吸気系へ供給してエンジンを潤滑する2サイクル
エンジンの潤滑方法において、前記電気パルス信号をエ
ンジンの積算回転数が所定数になる毎に発生させると共
に、この所定積算回転数をエンジン回転速度およびスロ
ットル開度が大であるほど小さく設定するため、エンジ
ンのトルクおよび回転速度に応じて常に最適量の潤滑油
を供給可能にする。
As described above, the two-stroke engine lubrication method according to the present invention is a two-stroke engine lubrication method in which lubricating oil is supplied to the intake system by an electromagnetic pump driven by an electric pulse signal to lubricate the engine. It is generated every time the engine's cumulative rotational speed reaches a predetermined number, and the predetermined cumulative rotational speed is set to be smaller as the engine rotational speed and throttle opening are larger, so it is always optimal according to the engine torque and rotational speed. Quantity of lubricating oil can be supplied.

したがって、潤滑油消費量を低減することができ、また
加速時に排気管から発生する白煙の問題を解消すること
ができる。
Therefore, the amount of lubricating oil consumed can be reduced, and the problem of white smoke generated from the exhaust pipe during acceleration can be solved.

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

第1図は本発明を実施するための2サイクルエンジンと
潤滑油供給装置を図示した説明図、第2図はスロットル
開度毎のエンジン所定積算回転数Sと電磁ポンプを駆動
する電気パルスPとの関係を示す説明図、第3図は本発
明による潤滑油吐出量の一例をスロットル開度θとの関
係で回転速度毎に表した図、第4図は同じくトルクと回
転速度Rとの関係で示した図、第5図は同じくスロット
ル開度θと回転速度Rとの関係で示した図である。 1−2サイクルエンジン、 2一点火栓、3・一点火コ
イル、 4−・気化器、 5−・・スロットルバー、 
6−ポテンショメータ、 7・−・オイルタンク、  
8−電磁ポンプ、  9・−・−制御部。
Fig. 1 is an explanatory diagram illustrating a two-stroke engine and a lubricating oil supply device for carrying out the present invention, and Fig. 2 shows a predetermined integrated engine speed S for each throttle opening and an electric pulse P for driving an electromagnetic pump. 3 is a diagram showing an example of the lubricating oil discharge amount according to the present invention in relation to the throttle opening θ for each rotation speed, and FIG. 4 is a diagram showing the relationship between torque and rotation speed R. The diagrams shown in and FIG. 5 are diagrams similarly showing the relationship between the throttle opening θ and the rotational speed R. 1-2 cycle engine, 2- spark plug, 3- spark coil, 4- carburetor, 5- throttle bar,
6-potentiometer, 7--oil tank,
8-Electromagnetic pump, 9.--Control unit.

Claims (1)

【特許請求の範囲】[Claims] 電気パルス信号で駆動する電磁ポンプにより潤滑油を吸
気系へ供給してエンジンを潤滑する2サイクルエンジン
の潤滑方法において、前記電気パルス信号をエンジンの
積算回転数が所定数になる毎に発生させると共に、この
所定積算回転数をエンジン回転速度およびスロットル開
度が大であるほど小さく設定することを特徴とする2サ
イクルエンジンの潤滑方法。
A two-cycle engine lubrication method in which lubricating oil is supplied to the intake system by an electromagnetic pump driven by an electric pulse signal to lubricate the engine, and the electric pulse signal is generated every time the cumulative rotational speed of the engine reaches a predetermined number. A method of lubricating a two-stroke engine, characterized in that the predetermined integrated rotational speed is set to be smaller as the engine rotational speed and throttle opening are larger.
JP15689185A 1985-07-18 1985-07-18 Lubrication method for 2-cycle engine Expired - Fee Related JPH0658052B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15689185A JPH0658052B2 (en) 1985-07-18 1985-07-18 Lubrication method for 2-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15689185A JPH0658052B2 (en) 1985-07-18 1985-07-18 Lubrication method for 2-cycle engine

Publications (2)

Publication Number Publication Date
JPS6220609A true JPS6220609A (en) 1987-01-29
JPH0658052B2 JPH0658052B2 (en) 1994-08-03

Family

ID=15637651

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15689185A Expired - Fee Related JPH0658052B2 (en) 1985-07-18 1985-07-18 Lubrication method for 2-cycle engine

Country Status (1)

Country Link
JP (1) JPH0658052B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01247821A (en) * 1988-03-30 1989-10-03 Osaka Shinku Kiki Seisakusho:Kk Bearing device for high-speed rotary device
JPH04339116A (en) * 1991-05-13 1992-11-26 Mikuni Corp Separated lubricating oil pump driving circuit for two-cycle engine
US5662188A (en) * 1994-08-12 1997-09-02 Toyota Jidosha Kabushiki Kaisha Device for effective lubrication of vehicle power transmission system upon starting of vehicle
WO2001075280A1 (en) * 2000-03-31 2001-10-11 Wacker-Werke Gmbh & Co. Kg Internal combustion engine with oil pump with energy supplying ignition unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01247821A (en) * 1988-03-30 1989-10-03 Osaka Shinku Kiki Seisakusho:Kk Bearing device for high-speed rotary device
JPH04339116A (en) * 1991-05-13 1992-11-26 Mikuni Corp Separated lubricating oil pump driving circuit for two-cycle engine
US5662188A (en) * 1994-08-12 1997-09-02 Toyota Jidosha Kabushiki Kaisha Device for effective lubrication of vehicle power transmission system upon starting of vehicle
WO2001075280A1 (en) * 2000-03-31 2001-10-11 Wacker-Werke Gmbh & Co. Kg Internal combustion engine with oil pump with energy supplying ignition unit

Also Published As

Publication number Publication date
JPH0658052B2 (en) 1994-08-03

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