WO2008092295A1 - Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre - Google Patents

Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre Download PDF

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Publication number
WO2008092295A1
WO2008092295A1 PCT/CN2007/000248 CN2007000248W WO2008092295A1 WO 2008092295 A1 WO2008092295 A1 WO 2008092295A1 CN 2007000248 W CN2007000248 W CN 2007000248W WO 2008092295 A1 WO2008092295 A1 WO 2008092295A1
Authority
WO
WIPO (PCT)
Prior art keywords
crankshaft
chamber
oil
check valve
crankcase
Prior art date
Application number
PCT/CN2007/000248
Other languages
English (en)
Chinese (zh)
Inventor
Hongfeng Li
Dingchang Wu
Chen-Hsiung Chang
Original Assignee
Hongfeng Li
Dingchang Wu
Chen-Hsiung Chang
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 Hongfeng Li, Dingchang Wu, Chen-Hsiung Chang filed Critical Hongfeng Li
Priority to PCT/CN2007/000248 priority Critical patent/WO2008092295A1/fr
Publication of WO2008092295A1 publication Critical patent/WO2008092295A1/fr

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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
    • F01M13/00—Crankcase ventilating or breathing

Definitions

  • the invention belongs to a gasoline engine lubrication system, in particular to a free-rotating small universal four-stroke gasoline engine lubrication system. Background technique
  • the passage 3, the crankcase chamber 6, the reed valve 7, the gear chamber 8, the valve chamber 9, the oil return passage 1, and the oil return pipe 5 (see Fig. 1 for the structure).
  • the oil pan mounted on the crankshaft stirs up the lubricating oil in the lubricating oil chamber to generate oil mist.
  • the reed valve at the bottom of the crankcase is closed, and the pressure in the crankcase chamber is reduced to less than lubrication.
  • the lubricating oil process is: lubricating oil chamber ⁇ oil pan ⁇ oil supply channel ⁇ crank chamber ⁇ connecting rod crank piston ⁇ reed valve ⁇ gear chamber ⁇ gear, camshaft ⁇ valve chamber ⁇ valve rocker arm ⁇ oil return passage ⁇ Return oil pipe ⁇ lubricating oil room.
  • the other is a patented lubrication system designed by the Tianjin Internal Combustion Engine Research Institute of China, which includes a lubricating oil chamber 27, an eccentric mechanism 26, a lubricating oil pump 24, a fuel supply passage 25, a crankcase chamber 29, a gear chamber 2 11, and a valve chamber. 2 12, oil mist circulation channel 22, circulating oil pipe 28 and two check valves, upper check valve 23 and lower check valve 210, and oil return passage 21 (the structure is shown in Fig.
  • the driving lubrication of the eccentric mechanism on the crankshaft pumps the lubricating oil through the oil supply passage in the crankcase, and sprays it onto the gear of the crankcase chamber and the gear chamber, forming an oil mist under the impact of the gear;
  • the check valve at the lower end of the lubricating oil mist circulation passage is closed, the pressure of the crank chamber is lowered to be lower than the pressure of the lubricating oil chamber, that is, 3 ⁇ 4 ⁇ 3 ⁇ 4, under the action of the difference, the upper end of the lubricating oil mist circulation passage
  • the check valve is opened, and the lubricating oil and oil mist accumulated in the lubricating oil mist circulation passage are flowed back.
  • the connecting rod, the crankshaft, the piston, the gear, the camshaft, the valve, the rocker arm and the like are lubricated; After the lubricating oil mist reaches the valve chamber, a large part of it flows back to the lubricating oil chamber through the lubricating oil mist circulation passage, and a small portion is separated by the oil and gas, collects into the oil return passage of the cylinder head cover, and flows back to the crank chamber through gravity.
  • the oil mist circulation passage flows back to the lubricating oil chamber through the oil mist circulation passage.
  • the lubrication process is: lubricating oil chamber ⁇ eccentric mechanism ⁇ lubricating oil pump ⁇ oil supply passage ⁇ crank chamber chamber “link crankshaft piston ⁇ lower end one-way wide ⁇ gear chamber ⁇ gear camshaft – valve chamber – valve rocker arm ⁇ oil mist cycle aisle.
  • the object of the present invention is to provide a free-rotating small-sized universal four-stroke gasoline engine lubrication system with a single structure, low cost, and reliable operation in view of the deficiencies of the prior art.
  • the free-rotating small universal four-stroke gasoline engine lubricating system of the present invention is characterized in that it comprises a crankcase, a crankshaft, an intake check valve, an air outlet check valve and an oil and gas separation chamber; the crankshaft is mounted on the crankcase through a bearing, A cavity surrounding the crankshaft is disposed at one end of the crankshaft, and a crankshaft vent hole is disposed on the crankshaft at the end, the crank vent hole has one end communicating with the cavity member and the other end communicating with the crank chamber; and the best way is the crankshaft vent hole
  • the axis of the crankshaft extends to the rear of the crank and bends from the side outlet of the crank to communicate with the crank chamber; the oil and gas separation chamber communicates with the valve chamber through the intake check valve, through the one-way outlet, the valve and the cavity at one end of the crankshaft and finally
  • the crank chamber is connected, and the oil and gas separation chamber is further provided with an air outlet communicating with the air.
  • the working principle of the invention is: using the piston to descend, causing pressure in the crankcase to cause the lubricating oil in the crankcase to splash, and the splashed lubricating oil is broken under the movement of the crankshaft and the gear mechanism, 'When the piston descends again The generated pressure causes the broken lubricating oil to be rapidly atomized, and then the atomized lubricating oil is lubricated to various parts of the body to achieve the purpose of atomizing the lubricating oil and lubricating the relevant parts of the engine.
  • the lubrication process is as follows: initial piston down, crankcase ⁇ ⁇ —lubricating oil splashing crankshaft and mechanism operation ⁇ broken lubricating oil ⁇ piston down again, crankcase ⁇ ⁇ lubricating oil quickly atomizing the suction port to return oil.
  • the working principle of the intake check valve is: It can only take in one-way air from the oil separation chamber to the valve chamber. When the piston is ascending, a negative pressure is formed in the crankcase, and the intake check valve opens and enters fresh air. The lubricating oil remaining in the oil separation chamber is sucked into the engine (crankcase) by the negative pressure action, thereby reducing the oil consumption rate.
  • the working principle of the air outlet check valve is: It can only ventilate from the crank chamber to the oil and gas separation chamber through the crankshaft air outlet in one direction.
  • the piston since it is in the closed state, it can rapidly increase the crankcase pressure and make the lubrication
  • the oil splashes and atomizes; but when it enters the normal working state, that is, when the pressure in the crank chamber reaches a certain pressure, the outlet check valve opens, and the oil in the crank chamber enters the oil separation chamber from the crankshaft outlet, thereby reducing the pressure in the crankcase.
  • the inlet and outlet check valves adopt a spherical check valve, which can greatly improve the work reliability, improve the sensitivity and reduce the cost.
  • the crankshaft vent is mainly used for ventilation.
  • the engine When the engine is not working, it is in a static state. Regardless of the position of the engine (such as inversion), since the outlet check valve is not open, the lubricating oil in the crankcase does not flow to the oil and gas. In the chamber; when the engine is working, since the crankshaft air outlet is designed around the crank, during the rotation of the crankshaft, the lubricating oil does not enter the oil separation chamber due to the centrifugal force.
  • the invention has the significant advantages of adopting a new design principle, a single process, a small number of components, low cost and high reliability; the lubricating oil never enters the oil separation chamber, and is turned over at 360 ° After continuous operation for more than 2 hours, there is no flameout and no smoke, and the effect is obvious.
  • the present invention has many advantages and practical values as described above, and has great advances in technology, has practical and simple effects, and has leapfrogging progress over existing stereo camera equipment and methods thereof. A viable, reliable, leading new design.
  • Fig. 1 is a schematic view showing the structure disclosed in Japanese Patent Laid-Open Publication No. Hei.
  • Fig. 2 is a schematic view showing the structure disclosed in the prior art of the Chinese patent.
  • FIG. 3 is a schematic structural view of an embodiment of the present invention.
  • oil return channel 2 oil pan
  • oil supply channel 4 lubricating oil room
  • Oil mist circulation channel 23 The upper end is unidirectional,
  • Valve chamber 311 Air outlet Specific implementation
  • the present invention is designed as a free-rotating small-sized general-purpose four-stroke gasoline engine lubrication system including a crankcase 31, a crankshaft 32, an intake check valve 33, an exhaust check valve 34, and an oil and gas separation chamber 35.
  • the crankshaft 32 is mounted on the crankcase 31 via a bearing 36.
  • a cavity 38 surrounding the crankshaft is provided at one end of the crankshaft 32, and a crankshaft vent 39 is provided on the crankshaft, and one end of the crankshaft vent 39 and the cavity 38 are provided.
  • the oil and gas separation chamber 35 communicates with the valve chamber 310 through the intake check valve 33, and communicates with the cavity 38 at one end of the crankshaft through the air outlet check valve 34, and the oil and gas separation chamber 35 is further provided.
  • An air outlet 311 communicating with the air.
  • crankcase 31 and the crankshaft 32 described above are substantially the same as the prior art, and both ends of the crankshaft 32 are mounted on the crankcase 31 via bearings 36.
  • crankcase 31 that is, a piston in the crank chamber is connected to the crankshaft via a connecting rod, in the piston Under the driving, the crankshaft rotates, above the piston, that is, below the valve chamber 310 is the combustion chamber of the engine.
  • the crankshaft vent 39 extends along the axis of the crankshaft to the rear of the crank and is coupled to the crank chamber from the side outlet of the crank.
  • the oil and gas separation chamber 35 located on the upper left side of the crankcase communicates with the valve chamber 310 of the engine through the intake check valve 33, and communicates with the chamber between the two oil seals via the outlet check valve 34.
  • the intake check valve 33 can only be inducted into the valve chamber, and the outlet check valve 34 can only output air to the oil separation chamber.
  • the inlet and outlet check valves preferably adopt a spherical check valve.
  • An air outlet 311 to the air is also provided on the oil and gas separation chamber.
  • the above-described intake check valve 33 and outlet check valve 34 employ a spherical check valve.
  • the free-rotating small-sized universal four-stroke gasoline engine lubrication system of the present invention uses the piston to descend to generate pressure in the crankcase, and causes the lubricating oil in the crankcase to splash.
  • the splashed lubricating oil is broken under the movement of the crankshaft and the gear mechanism.
  • the piston descends again, the pressure generated causes the broken lubricating oil to rapidly atomize, and then the atomized lubricating oil is lubricated to various parts of the body, thereby achieving the purpose of atomizing the lubricating oil and lubricating the relevant parts of the engine. .
  • the intake check valve can only enter the air chamber from the oil separation chamber to the valve chamber.
  • a negative pressure is formed in the crankcase, and the intake check valve is opened to incorporate fresh air, and the negative pressure is utilized.
  • the oil remaining in the oil separation chamber is sucked into the engine (crankcase), thereby reducing the oil consumption rate.
  • the working principle of the air outlet check valve is: It can only ventilate from the crank chamber to the oil and gas separation chamber through the crankshaft air outlet in one direction.
  • the piston since it is in the closed state, it can rapidly increase the crankcase pressure and make the lubrication
  • the oil splashes and atomizes; but when it enters the normal working state, that is, when the pressure in the crank chamber reaches a certain pressure, the outlet check valve opens, and the oil in the crank chamber enters the oil separation chamber from the crankshaft outlet, thereby reducing the pressure in the crankcase.
  • the inlet and outlet single-way valves adopt a spherical one-way valve, which can greatly improve the work reliability, improve the sensitivity and reduce the cost.
  • the crankshaft vent is mainly used for ventilation.
  • the engine When the engine is not working, it is in a static state. Regardless of the position of the engine (such as inversion), since the outlet check valve is not open, the lubricating oil in the crankcase does not flow to the oil and gas. In the room; when the engine is working, because the crankshaft vent is designed Around the crank, during the rotation of the crankshaft, the lubricating oil does not enter the oil separation chamber due to the centrifugal force.
  • the free-rotating small-sized general-purpose four-stroke gasoline engine lubricating system of the present invention when the engine is not in operation, is in a static state, regardless of the position of the engine (such as inversion), since the outlet check valve is not opened, the lubricating oil in the crankcase It does not flow into the oil and gas separation chamber; when the engine is working, since the crankshaft air outlet is designed around the crank, during the rotation of the crankshaft, the lubricating oil does not enter the oil separation chamber due to the centrifugal force.
  • the invention adopts a completely new design principle, has simple process, few parts, low cost and high reliability; the lubricating oil never enters the oil and gas separation chamber, and does not extinguish fire or smoke when continuously operated for more than 2 hours at 360° turning. The effect is remarkable.

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

Abstract

L'invention concerne un système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre. Ce moteur comprend un carter moteur (31), un vilebrequin (32), un clapet de non-retour (33) destiné à l'injection de gaz, un clapet de non-retour (34) destiné à l'évacuation de gaz, et un séparateur d'hydrocarbures (35). Le vilebrequin (32) est monté dans le carter moteur (31) à l'aide de roulements (36). Une chambre (38) entourant le carter moteur est située à l'extrémité du carter moteur (32). Un canal (39) est situé dans le carter moteur, une extrémité du canal (39) étant en communication avec un logement (38), l'autre extrémité du canal étant en communication avec le carter moteur, le séparateur d'hydrocarbures (35) étant en communication avec un logement de clapet (310) par le clapet de non-retour (33) destiné à l'injection de gaz et en communication avec le logement (38) entourant le carter moteur par le clapet de non-retour (34) destiné à l'évacuation du gaz et enfin en communication avec le carter moteur. Une sortie d'air (311) est prévue dans le séparateur d'hydrocarbures (35).
PCT/CN2007/000248 2007-01-23 2007-01-23 Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre WO2008092295A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/000248 WO2008092295A1 (fr) 2007-01-23 2007-01-23 Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/000248 WO2008092295A1 (fr) 2007-01-23 2007-01-23 Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre

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WO2008092295A1 true WO2008092295A1 (fr) 2008-08-07

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PCT/CN2007/000248 WO2008092295A1 (fr) 2007-01-23 2007-01-23 Système de lubrification destiné à un moteur diesel quatre temps de petite taille à rotation libre

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434243A (zh) * 2010-09-09 2012-05-02 株式会社牧田 四冲程发动机的润滑构造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6109250A (en) * 1998-05-29 2000-08-29 Andreas Stihl Ag & Co. Internal combustion engine
CN1478174A (zh) * 2000-11-30 2004-02-25 ¿ 四冲程内燃机

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6109250A (en) * 1998-05-29 2000-08-29 Andreas Stihl Ag & Co. Internal combustion engine
CN1478174A (zh) * 2000-11-30 2004-02-25 ¿ 四冲程内燃机

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434243A (zh) * 2010-09-09 2012-05-02 株式会社牧田 四冲程发动机的润滑构造

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