JPH03260311A - Lubricating oil supplying device for two cycle engine - Google Patents

Lubricating oil supplying device for two cycle engine

Info

Publication number
JPH03260311A
JPH03260311A JP5655890A JP5655890A JPH03260311A JP H03260311 A JPH03260311 A JP H03260311A JP 5655890 A JP5655890 A JP 5655890A JP 5655890 A JP5655890 A JP 5655890A JP H03260311 A JPH03260311 A JP H03260311A
Authority
JP
Japan
Prior art keywords
lubricating oil
oil pump
engine
piston
temperature sensor
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
JP5655890A
Other languages
Japanese (ja)
Other versions
JP2827408B2 (en
Inventor
Takaaki Uchino
内野　高明
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 JP2056558A priority Critical patent/JP2827408B2/en
Publication of JPH03260311A publication Critical patent/JPH03260311A/en
Application granted granted Critical
Publication of JP2827408B2 publication Critical patent/JP2827408B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F01M3/02—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 with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

PURPOSE:To improve lubricating condition between a cylinder and a piston by driving an electric oil pump for a prescribed time by a timer, in association with turning on of an ignition switch, when cold condition is detected by a temperature sensor, during engine start. CONSTITUTION:A throttle valve 3 and reed valve 4 for adjusting an intake air quantity are arranged in an intake passage 2 communicating with the crank chamber 1 of a two cycle engine, and also fuel is injected from a fuel injecting nozzle 5 to the intake air. Lubricating oil sucked from an oil tank 8 by an oil pump 7 interlocking with a crankshaft 6, is supplied from a discharging nozzle 9 to the intake air passage 2. In this case, when the engine is started in cold state, electrification is also carried out onto a timer 16 and a temperature sensor 17, in association with connection of an ignition switch 15 to a power supply battery 18. An electric oil pump 10 is driven, and lubricating oil is supplied from a discharging port 11 thereof to the wall surface of a cylinder 12 so as to lubricate the sliding surface of a piston 13.

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オイル供給装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lubricating oil supply device for a two-cycle engine.

〔従来の技術〕[Conventional technology]

最近のニサイクルエンジンは、多くのものが、エンジン
のクランク軸に連動させたオイルポンプを設け、エンジ
ンの回転と共に、オイルポンプで微量ずつ潤滑オイルを
吸気通路などに吐出させ、吸気ガスに潤滑オイルを供給
して各部を潤滑するようにしている。例えば、実開昭６
３−９３４０６号公報参照。Most modern two-cycle engines are equipped with an oil pump that is linked to the engine crankshaft, and as the engine rotates, the oil pump discharges lubricating oil little by little into the intake passage, adding lubricating oil to the intake gas. is supplied to lubricate each part. For example,
See Publication No. 3-93406.

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

エンジンを継続して運転していているときは、エンジン
と共にオイルポンプが回転して、潤滑オイルが吸気ガス
に混入されて潤滑できる。ところが、エンジンを停止し
て放置し、冷えたエンジンを始動するときは、シリンダ
ーやピストンに付着していた潤滑オイルがクランク室下
部に流れ落ちている。このため、エンジンを始動しても
、直ぐに潤滑オイルがシリンダー壁などに回らない。そ
して、ピストンが始動と共に激しい摺動運動を行うと局
所的に高温になり、油膜切れが発生して、ピストンにス
カフィングが発生したり焼付く原因になる。When the engine is running continuously, the oil pump rotates together with the engine, and lubricating oil is mixed into the intake gas to provide lubrication. However, when you start a cold engine after the engine has been stopped, the lubricating oil that had adhered to the cylinders and pistons flows down to the bottom of the crank chamber. For this reason, even when the engine is started, lubricating oil does not immediately circulate to the cylinder walls. Then, when the piston undergoes intense sliding motion upon startup, it becomes locally hot and the oil film breaks down, causing scuffing or seizure of the piston.

この発明は、かかる点に鑑み、冷えたエンジンを始動す
るときに、エンジンに連動させたオイルポンプとは別に
、短時間駆動する電動オイルポンプを設けて、シリンダ
ー壁に潤滑オイルを吐出し、始動直後のピストンのスカ
フィングや焼付きを防止できるニサイクルエンジンの潤
滑オイル供給装置を得ることを目的とする。In view of this, when starting a cold engine, the present invention provides an electric oil pump that is driven for a short time in addition to the oil pump linked to the engine, and discharges lubricating oil onto the cylinder wall to start the engine. The purpose of the present invention is to obtain a lubricating oil supply device for a two-cycle engine that can prevent scuffing and seizure of the piston immediately afterward.

〔課題を解決するための手段〕[Means 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
ジンの潤滑オイル供給装置は、エンジンに連動させたオ
イルポンプで微量ずつ潤滑オイルを吐出して吸気通路な
どに供給して吸気ガスに混入すると共に、冷えたエンジ
ンを始動するときに、温度センサーで冷機状態を検知し
、イグニションスイッチを接続すると共にタイマーで所
定時間電動オイルポンプを駆動してシリンダー壁面に潤
滑オイルを吐出するようにしたことにある。In order to achieve the above object, the lubricating oil supply device for a two-cycle engine of the present invention discharges lubricating oil little by little with an oil pump linked to the engine, supplies it to the intake passage, etc., and mixes it into the intake gas. When starting a cold engine, a temperature sensor detects the cold state, connects the ignition switch, and uses a timer to drive the electric oil pump for a predetermined period of time to discharge lubricating oil onto the cylinder wall. .

〔作用〕[Effect]

冷えたエンジンは、シリンダー壁などの潤滑オイルが、
クランク室下部に流れ落ちていて油膜が薄くなっている
。このような、冷えたエンジンを始動するために、イグ
ニションスイッチを接続すると同時に、温度センサーで
冷機状態を検知し、電動オイルポンプが駆動してシリン
ダー壁面に潤滑オイルを吐出するので、始動と共にシリ
ンダーとピストンの摺動面に油膜が形成できて、ピスト
ンのスカフィングや焼付きを防止できる。電動オイルポ
ンプは、タイマーで短時間駆動して停止するが、このと
きは、エンジンに連動するオイルポンプの潤滑オイルが
各部に回り、潤滑されるようになる。In a cold engine, the lubricating oil on the cylinder walls, etc.
The oil film has become thinner as it flows down to the bottom of the crank chamber. In order to start a cold engine, at the same time the ignition switch is connected, a temperature sensor detects the cold state, and the electric oil pump is activated to discharge lubricating oil onto the cylinder wall. An oil film forms on the sliding surface of the piston, preventing piston scuffing and seizure. The electric oil pump is driven by a timer for a short period of time and then stopped. At this time, the lubricating oil from the oil pump linked to the engine circulates to all parts to lubricate them.

〔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.

ニサイクルエンジンのクランク室１に通じる吸気通路２
には、吸気量を調節するスロットルノくルブ３とリード
バルブ４が設けてあり、クランク室１に吸入される吸気
に燃料噴射ノズル５で燃料が噴射されて吸気ガスにされ
る。一方、クランク軸６に連動させたオイルポンプ７は
、回転によって、オイルタンク８の潤滑オイルを汲上げ
て微量ずつ吐出するようにしてあり、吐出しノズル９を
吸気通路２に設けて、吸気ガスに潤滑オイルを供給する
。オイルポンプ７と並列に電動オイルポンプ１０を設け
、電動オイルポンプ１０の吐出口１１を、シリンダー１
２の内壁に開口させる。吐出口１１は、ピストン１３が
下死点にあるとき、ピストン１３の頂面より下でシリン
ダー１２の排気口１４側がよい。電動オイルポンプ１０
は、イグニションスイッチ１５、タイマー１６、温度セ
ンサー１７を介して、電源バッテリー１８に結線する。Intake passage 2 leading to the crank chamber 1 of a two-cycle engine
The engine is equipped with a throttle knob 3 and a reed valve 4 for adjusting the amount of intake air, and a fuel injection nozzle 5 injects fuel into the intake air drawn into the crank chamber 1 to turn it into intake gas. On the other hand, an oil pump 7 linked to the crankshaft 6 pumps up lubricating oil from an oil tank 8 and discharges it little by little as it rotates. supply lubricating oil. An electric oil pump 10 is provided in parallel with the oil pump 7, and the discharge port 11 of the electric oil pump 10 is connected to the cylinder 1.
Make an opening in the inner wall of 2. The discharge port 11 is preferably located below the top surface of the piston 13 and on the exhaust port 14 side of the cylinder 12 when the piston 13 is at the bottom dead center. electric oil pump 10
is connected to a power source battery 18 via an ignition switch 15, a timer 16, and a temperature sensor 17.

温度センサー１７は、シリンダー１２に取付け、シリン
ダー１２が冷えているときに通電する。冷えたエンジン
を始動するために、イグニションスイッチ１５を接続す
ると、タイマー１６、温度センサー１７も通電していて
電動オイルポンプ１０が駆動されて、シリンダー１２の
壁面に潤滑オイルが送られ、ピストン１３の摺動面が潤
滑され、ピストン１３のスカフィングや焼付きを防ぐ。The temperature sensor 17 is attached to the cylinder 12 and is energized when the cylinder 12 is cold. When the ignition switch 15 is connected to start a cold engine, the timer 16 and temperature sensor 17 are also energized, and the electric oil pump 10 is driven, sending lubricating oil to the wall of the cylinder 12 and pumping the piston 13. The sliding surface is lubricated to prevent scuffing and seizure of the piston 13.

電動オイルポンプ１０は、タイマー１６で短時間運転で
停止し、後は、クランク軸６に連動するオイルポンプ７
で潤滑オイルが供給される。暖機エンジンを再始動する
ときは、温度センサー１７が切れていて、電動オイルポ
ンプ１０は駆動されない。The electric oil pump 10 is stopped after a short period of time by a timer 16, and then the oil pump 7 is operated in conjunction with the crankshaft 6.
lubricating oil is supplied. When the warmed-up engine is restarted, the temperature sensor 17 is turned off and the electric oil pump 10 is not driven.

〔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、エンジンが冷機状態で、シリンダー壁面の潤滑
オイルがクランク室に流れ落ちて油膜が薄くなっている
ときに、エンジンを始動するためにイグニションスイッ
チを接続すると、短時間電動オイルポンプが駆動されて
、シリンダー壁面に潤滑オイルが送られ、ピストン摺動
面が始動直後から潤滑できて、ピストンのスカフィング
や焼付きを防止できる。As explained above, since the present invention is configured as described above, when the engine is cold and the lubricating oil on the cylinder wall has flowed down into the crank chamber and the oil film is thin, it is possible to start the engine. When the ignition switch is connected, the electric oil pump is activated for a short period of time, sending lubricating oil to the cylinder wall, lubricating the piston sliding surfaces immediately after starting the engine, and preventing piston scuffing and seizure.

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

図は本発明の一実施例を示す縦断面図である。 ２・・・吸気通路、７・・・オイルポンプ、１０・・・
電動オイルポンプ、１２・・・シリンダー　１５・・・
イグニションスイッチ、１６・・・タイマー　１７・・
・温度センサ−The figure is a longitudinal sectional view showing an embodiment of the present invention. 2...Intake passage, 7...Oil pump, 10...
Electric oil pump, 12... cylinder 15...
Ignition switch, 16... Timer 17...
・Temperature sensor

Claims (1)

【特許請求の範囲】[Claims] 　エンジンに連動させたオイルポンプで微量ずつ潤滑オ
イルを吐出して吸気通路などに供給して吸気ガスに混入
すると共に、冷えたエンジンを始動するときに、温度セ
ンサーで冷機状態を検知し、イグニションスイッチを接
続すると共にタイマーで所定時間電動オイルポンプを駆
動してシリンダー壁面に潤滑オイルを吐出するようにし
たことを特徴とする二サイクルエンジンの潤滑オイル供
給装置。An oil pump connected to the engine discharges lubricating oil little by little and supplies it to the intake passage and mixes it into the intake gas.When starting a cold engine, a temperature sensor detects the cold state and turns the ignition switch on. A lubricating oil supply device for a two-cycle engine, characterized in that the lubricating oil supply device for a two-cycle engine is connected to the lubrication oil pump and drives an electric oil pump for a predetermined period of time using a timer to discharge lubricating oil onto a cylinder wall surface.
JP2056558A 1990-03-09 1990-03-09 Two-stroke engine lubrication oil supply system Expired - Lifetime JP2827408B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2056558A JP2827408B2 (en) 1990-03-09 1990-03-09 Two-stroke engine lubrication oil supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2056558A JP2827408B2 (en) 1990-03-09 1990-03-09 Two-stroke engine lubrication oil supply system

Publications (2)

Publication Number Publication Date
JPH03260311A true JPH03260311A (en) 1991-11-20
JP2827408B2 JP2827408B2 (en) 1998-11-25

Family

ID=13030447

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2056558A Expired - Lifetime JP2827408B2 (en) 1990-03-09 1990-03-09 Two-stroke engine lubrication oil supply system

Country Status (1)

Country Link
JP (1) JP2827408B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609866A1 (en) * 1993-02-03 1994-08-10 Yamaha Hatsudoki Kabushiki Kaisha Two-stroke engine and method of directly lubricating a piston of same
US5353759A (en) * 1992-03-19 1994-10-11 Sanshin Kogyo Kabushiki Kaisha Crank chamber compression type two cycle engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353759A (en) * 1992-03-19 1994-10-11 Sanshin Kogyo Kabushiki Kaisha Crank chamber compression type two cycle engine
EP0609866A1 (en) * 1993-02-03 1994-08-10 Yamaha Hatsudoki Kabushiki Kaisha Two-stroke engine and method of directly lubricating a piston of same

Also Published As

Publication number Publication date
JP2827408B2 (en) 1998-11-25

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