WO2005026504A1 - Petit moteur a essence a quatre temps a lubrification par brouillard d'huile - Google Patents

Petit moteur a essence a quatre temps a lubrification par brouillard d'huile Download PDF

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Publication number
WO2005026504A1
WO2005026504A1 PCT/CN2004/000998 CN2004000998W WO2005026504A1 WO 2005026504 A1 WO2005026504 A1 WO 2005026504A1 CN 2004000998 W CN2004000998 W CN 2004000998W WO 2005026504 A1 WO2005026504 A1 WO 2005026504A1
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WO
WIPO (PCT)
Prior art keywords
chamber
oil
oil mist
communicates
oil return
Prior art date
Application number
PCT/CN2004/000998
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English (en)
French (fr)
Inventor
Ji-Rong Hu
Original Assignee
Ji-Rong Hu
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 Ji-Rong Hu filed Critical Ji-Rong Hu
Priority to US10/569,027 priority Critical patent/US7243632B2/en
Priority to EP04762133A priority patent/EP1666703A4/en
Publication of WO2005026504A1 publication Critical patent/WO2005026504A1/zh

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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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/06—Dip or splash lubrication
    • 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
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • 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
    • F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
    • F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools

Definitions

  • the utility model relates to a general-purpose gasoline engine, in particular to a small four-stroke general-purpose gasoline engine with improved lubricating oil circuit and lubrication method.
  • the utility model provides a small four-stroke general-purpose gasoline engine with simple and reasonable structure and lubricating various components in the engine by utilizing the good fluidity of the oil mist.
  • the technical solution adopted by the utility model to solve its technical problems includes upper and lower cases, a crankshaft assembly, a piston assembly, a cylinder head assembly, a cylinder head cover and a lubricating oil path.
  • the lubricating oil path includes a crankshaft chamber, a convex shaft wheel Chamber, upper rocker arm chamber, condensing chamber, camshaft chamber and upper rocker chamber are connected by tappet cavity, upper rocker arm chamber is in communication with condensing chamber, and oil is formed by upper and lower boxes on the side of crankshaft chamber
  • the bottom of the oil mist chamber communicates with the crankshaft chamber.
  • An oil throwing impeller is fixed on the crankshaft extending into the oil mist chamber, and an upper case oil passage is provided on the upper case between the oil mist chamber and the camshaft chamber.
  • the cylinder head assembly is provided with a cylinder head oil return channel.
  • the upper tank is provided with an upper tank oil return channel.
  • the upper port of the cylinder head oil return channel communicates with the upper rocker arm chamber, and the lower port is connected with the upper tank oil return.
  • the lower port of the upper oil return channel communicates with the crank chamber.
  • the interface of the cylinder head assembly between the cylinder head oil return channel and the upper tank oil return channel is provided.
  • the reed valve is provided with a limit plate.
  • the oil throwing impeller rotates with the crankshaft, so that the lubricating oil mist is generated in the lubricating oil chamber, and the lubricating oil mist is circulated in the lubricating oil path through the pressure change caused by the vertical movement of the piston assembly.
  • the fluidity of the machine lubricates all parts in the machine; it has the characteristics of simple structure, uniform and reliable lubrication, low power consumption, low production cost, and stable product quality.
  • FIG. 1 is a schematic structural diagram of the present invention.
  • FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1.
  • FIG. 3 is a schematic bottom view of the cylinder head assembly of FIG. 1.
  • Fig. 4 is a schematic view of the B-B sectional structure of Fig. 3. detailed description
  • a specific embodiment of a small four-stroke universal gasoline engine lubricated with oil mist includes an upper case 3, a lower case 4, a crankshaft assembly 1, a piston assembly 8, and a cylinder head.
  • Assembly 5, cylinder head cover 6, and lubricating oil path, the lubricating oil path includes crankshaft chamber B, camshaft chamber (, upper rocker chamber D, condensation chamber E, camshaft chamber C and upper rocker chamber D
  • the rod cavity 13 is connected, and the upper rocker chamber D communicates with the condensing chamber E.
  • the condensing chamber is a long and narrow space.
  • an oil mist chamber A is constituted by an upper case 3 and a lower case 4.
  • the bottom of the oil mist chamber A communicates with the crank chamber B.
  • a crankshaft protruding into the oil mist chamber A is fixed with a throw.
  • the oil tank 2 is provided with an upper tank oil passage 12 on the upper casing 3 between the oil mist chamber A and the camshaft chamber C, and the cylinder head assembly 5 is provided with a cylinder head oil return passage 15 on the upper casing 3.
  • An upper tank oil return channel 14 is provided.
  • the upper port of the cylinder head oil return channel 15 communicates with the upper rocker chamber D, and the lower port is connected with the upper tank oil return channel 14.
  • the lower port of the tank oil return channel 14 communicates with the crank chamber B; the cylinder head oil return channel 15
  • a reed valve 7 is provided on the interface between the cylinder head assembly 5 and the upper tank oil return channel 14.
  • a limit plate 11 is provided at the bottom of the reed wide 7.
  • the pressure of each chamber is set as follows: Condensation chamber E pressure_P0, Camshaft chamber C pressure-Pl, Upper rocker chamber D pressure-P2, Crankshaft chamber B pressure-P3, oil mist chamber A pressure-P4.
  • the oil throwing impeller 2 mounted on the crankshaft assembly 1 rotates with the crankshaft to disperse the lubricating oil at the bottom of the oil mist chamber A, and an oil mist is formed in the mist chamber A.
  • the oil mist is installed in the cylinder head assembly 5
  • the reed valve 7 at the bottom opens or closes as the pressure in each chamber changes to control the circulation direction of the lubricating oil circuit.
  • the utility model fundamentally changes the original lubrication method.
  • the entire system uses oil mist lubrication, and the pressure change of the piston assembly 8 is used to realize the oil circuit circulation.
  • the structure is simple and reliable, and all components can be used. Get even lubrication without leaving dead ends.

Landscapes

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

Description

油雾润滑的小型四冲程通用汽油机 技术领域
本实用新型涉及一种通用汽油机， 特别是一种小型四冲程通用汽油 机润滑油路及润滑方式的改进。 背景技术
众所周知， 现有的小型四冲程通用汽油机均采用润滑油飞溅和压力 喷油相结合的润滑方式， 将润滑油飞溅或利用压力喷油到零部件表面来 润滑， 这种方式的特点是需在机上布置润滑油泵及飞溅装置结构较为复 杂， 润滑效果一般并存在着死角， 而且动力损耗大。 实用新型内容
为了克服现有小型四冲程通用汽油机存在的上述弊病， 本实用新型提 供一种结构简单合理、 利用油雾较好的流动性对机内各个零部件进行润 滑的油雾润滑的小型四冲程通用汽油机。 本实用新型解决其技术问题所 采用的技术方案包括上、 下箱体、 曲轴总成、 活塞总成、 汽缸头总成、 汽缸头盖及润滑油路， 润滑油路包括曲轴室、 凸轴轮室、 上摇臂室、 冷 凝室， 凸轮轴室与上摇臂室之间通过挺杆空腔相连， 上摇臂室与冷凝室 相通， 在曲轴室的侧部由上、 下箱体构成油雾室， 油雾室的底部与曲轴 室相通， 在伸进油雾室的曲轴上固定设有甩油叶轮， 油雾室与凸轮轴室 之间的上箱体上设有上箱体油道， 汽缸头总成上设有汽缸头回油道， 上 箱体上设有上箱体回油道， 汽缸头回油道的上接口与上摇臂室相通， 下 接口与上箱体回油道相连， 上箱体回油道的下接口与曲轴室相通。
为了使润滑油雾能随活塞总成上、 下运动产生的压力变化在润滑油 路内循环， 所述的汽缸头回油道与上箱体回油道之间汽缸头总成的接口 上设有簧片阀。 为了使润滑油路循环可靠， 所述的簧片阀上设有限位板。
采用上述结构后， 甩油叶轮随曲轴旋转， 使润滑油在油雾室内产生 润滑油雾， 润滑油雾通过活塞总成上下运动产生的压力变化在润滑油路 内循环， 利用润滑油雾较好的流动性对机内的各个零部件进行润滑； 具 有结构简单、 润滑均匀可靠、 动力消耗小、 生产成本低、 产品质量稳定 等特点。 附图说明
图 1为本实用新型的结构示意图。
图 2为图 1的 A-A剖视结构示意图。
图 3为图 1 汽缸头总成的仰视结构视意图。
图 4为图 3的 B- B剖视结构视意图。 具体实施方式
图 1 至图 4所示， 本实用新型油雾润滑的小型四冲成通用汽油机的 具体实施方案， 它包括上箱体 3、 下箱体 4、 曲轴总成 1、 活塞总成 8、 汽缸头总成 5、 汽缸头盖 6及润滑油路， 润滑油路包括曲轴室 B、 凸轮轴 室（、 上摇臂室 D、 冷凝室 E、 凸轮轴室 C与上摇臂室 D之间通过挺杆空 腔 13相连， 上摇臂室 D与冷凝室 E相通， 冷凝室为一狭长空间， 其作用 为油雾在此处凝结， 便于回流， 并通过通气管 9与进气管 10相通， 平衡 压力； 在曲轴室 B的侧部由上箱体 3和下箱体 4构成油雾室 A， 油雾室 A 的底部与曲轴室 B相通， 在伸进油雾室 A的曲轴上固定设有甩油叶轮 2， 油雾室 A与凸轮轴室 C之间的上箱体 3上设有上箱体油道 12， 汽缸头总 成 5上设有汽缸头回油道 15， 上箱体 3上设有上箱体回油道 14， 汽缸头 回油道 15 的上接口与上摇臂室 D 相通， 下接口与上箱体回油道 14 相 连， 上箱体回油道 14的下接口与曲轴室 B相通； 所述的汽缸头回油道 15 与上箱体回油道 14之间汽缸头总成 5的接口上设有簧片阀 7， 为使簧片 阀 7工作可靠， 所述的簧片阔 7底部设有限位板 11。
为便于描述汽油机运转时润滑油路油雾循环的工作过程， 设定各室 的压力如下： 冷凝室 E压力 _P0， 凸轮轴室 C压力- Pl， 上摇臂室 D压力 - P2,曲轴室 B压力 -P3,油雾室 A压力- P4。 汽油机运转时， 装在曲轴总成 1 上的甩油叶轮 2 随曲轴一起转动， 将油雾室 A底部的润滑油搅散， 在由 雾室 A 内形成油雾， 通过装在汽缸头总成 5底部的簧片阀 7随各室压力 变化开启或关闭来控制润滑油路的循环方向。
当活塞总成 8 下行时， 曲轴室 B 压力 P3 升高， 各室压力的关系为 P3>P4>P1>P2>P0, 油雾通过上箱体油道 12 由油雾室 A进入凸轮轴室 C， 凸轮轴室 C的油雾通过挺杆空腔 13进入上摇臂室 D， 上摇臂室 D的油雾 进入冷凝室 E， 油路的油雾方向如图 1箭头所示， 此时簧片阀 7处于关闭 状态。
当活塞总成 8 上行时， 曲轴室 B 压力 P3 下降， 各室压力的关系为 P3<P4<PKP2<P0, 与活塞总成 8 下行时相反， 此时簧片阀 7 在压力作用 下打开， 将冷凝室 Β凝结的润滑油通过汽缸头回油道 15、 簧片阀 7 以及 上箱体回油道 14 吸回到曲轴室 Β， 润滑油通过相通的底部回到油雾室 Α, 油路回流的方向如图 2箭头所示， 从而完成油雾润滑一个循环过程。
综上所述， 本实用新型从根本上改变了原来的润滑方式， 整个系统 均采用油雾润滑， 利用活塞总成 8 上下运动的压力变化来实现油路循 环， 结构简单可靠， 各部件均可得到均匀润滑， 不留死角。

Claims

2005/026504 权 利 要 求
1、 一种油雾润滑的小型四冲程通用汽油机， 包括上箱体 （3) 、 下 箱体 （4) 、 曲轴总成 （1) 、 活塞总成 （8) 、 汽缸头总成 （5) 、 汽缸 头盖 （6) 及润滑油路， 润滑油路包括曲轴室 （B) 、 凸轴轮室 （C) 、 上 摇臂室 （D) 、 冷凝室 （E) ， 凸轮轴室 （C) 与上摇臂室 （D) 之间通过 挺杆空腔 （13) 相连， 上摇臂室 （D) 与冷凝室 （E) 相通， 其特征是： 在曲轴室 （B) 的侧部由上箱体 （3) 和下箱体 （4) 构成油雾室 （A) ， 油雾室 （A) 的底部与曲轴室 （B) 相通， 在伸进油雾室 （A) 的曲轴上固 定设有甩油叶轮 （2) ， 油雾室 （A) 与凸轮轴室 （C) 之间的上箱体
(3) 上设有上箱体油道 （12) , 汽缸头总成 （5) 上设有汽缸头回油道 (15) ， 上箱体 （3) 上设有上箱体回油道 （14) ， 汽缸头回油道 （15) 的上接口与上摇臂室 （D) 相通， 下接口与上箱体回油道 （14) 相连， 上 箱体回油道 （14) 的下接口与曲轴室 （B) 相通。
2、 根据权利要求 1 所述的油雾润滑的小型四冲程通用汽油机， 其特 征是： 所述的汽缸头回油道 （15) 与上箱体回油道 （14) 之间汽缸头总 成 （5) 的接口上设有簧片阀 （7) 。
3、 根据权利要求 2所述的油雾润滑的小型四冲程通用汽油机， 其特 征是： 所述的簧片阀 （7) 上设有限位板 （11) 。
PCT/CN2004/000998 2003-08-29 2004-08-27 Petit moteur a essence a quatre temps a lubrification par brouillard d'huile WO2005026504A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/569,027 US7243632B2 (en) 2003-08-29 2004-08-27 Small four-stroke gasoline engine with oil mist lubrication
EP04762133A EP1666703A4 (en) 2003-08-29 2004-08-27 SMALL FOUR-STICK PETROL ENGINE WITH OIL MELT LUBRICATION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN03210165.1 2003-08-29
CNU032101651U CN2649780Y (zh) 2003-08-29 2003-08-29 油雾润滑的小型四冲程通用汽油机

Publications (1)

Publication Number Publication Date
WO2005026504A1 true WO2005026504A1 (fr) 2005-03-24

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Application Number Title Priority Date Filing Date
PCT/CN2004/000998 WO2005026504A1 (fr) 2003-08-29 2004-08-27 Petit moteur a essence a quatre temps a lubrification par brouillard d'huile

Country Status (4)

Country Link
US (1) US7243632B2 (zh)
EP (1) EP1666703A4 (zh)
CN (1) CN2649780Y (zh)
WO (1) WO2005026504A1 (zh)

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Also Published As

Publication number Publication date
CN2649780Y (zh) 2004-10-20
EP1666703A1 (en) 2006-06-07
EP1666703A4 (en) 2009-03-11
US20060254556A1 (en) 2006-11-16
US7243632B2 (en) 2007-07-17

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