WO2020220728A1 - Structure d'entrée de carburant d'un moteur à essence à deux temps - Google Patents

Structure d'entrée de carburant d'un moteur à essence à deux temps Download PDF

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Publication number
WO2020220728A1
WO2020220728A1 PCT/CN2020/070022 CN2020070022W WO2020220728A1 WO 2020220728 A1 WO2020220728 A1 WO 2020220728A1 CN 2020070022 W CN2020070022 W CN 2020070022W WO 2020220728 A1 WO2020220728 A1 WO 2020220728A1
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WO
WIPO (PCT)
Prior art keywords
pressure relief
relief valve
inlet pipe
fuel
fuel inlet
Prior art date
Application number
PCT/CN2020/070022
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English (en)
Chinese (zh)
Inventor
黄新跃
金传信
Original Assignee
浙江中马园林机器股份有限公司
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Publication date
Application filed by 浙江中马园林机器股份有限公司 filed Critical 浙江中马园林机器股份有限公司
Publication of WO2020220728A1 publication Critical patent/WO2020220728A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/20—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines characterised by means for preventing vapour lock

Definitions

  • the invention belongs to the technical field of gasoline engines, and relates to an oil intake structure of a two-stroke gasoline engine.
  • the upper end of the oil inlet pipe of the current two-stroke gasoline engine carburetor is connected to the carburetor copper pipe, the lower end is plugged into the fuel filter, the oil inlet pipe is soaked in the fuel tank, and the middle part is stuck on the fuel tank shell.
  • the carburetor will receive the high-frequency negative pressure pulse from the crankcase. This pulse will vacuum the carburetor and its connected fuel inlet pipe, forcing the fuel to flow up into the carburetor, and then the carburetor will eject the oil.
  • Fog together with the incoming air, participates in the combustion work of the gasoline engine; after the gasoline engine is stopped, the temperature is very high, and the gasoline engine is difficult to restart.
  • the high-pressure air resistance prevents the oil inlet pipe from entering oil.
  • the gasoline engine can only be started normally after the temperature of the carburetor and the oil inlet pipe drops.
  • the air resistance in the oil inlet pipe at high temperatures makes it difficult to start the gasoline engine, which is a cause for people’s production and life. It was a great inconvenience.
  • the present invention provides an oil intake structure for a two-stroke gasoline engine.
  • the technical problem to be solved by the present invention is how to improve the normal starting probability of the gasoline engine in a high temperature environment after shutdown.
  • a fuel intake structure for a two-stroke gasoline engine comprising a carburetor, a fuel tank, and a hollow fuel intake pipe.
  • One end of the fuel intake pipe is sealed to the carburetor, and the other end is inserted into the fuel tank and extends To the bottom of the fuel tank, the fuel inlet end of the fuel inlet pipe is also provided with a fuel filter connected to the fuel inlet of the fuel inlet pipe; characterized in that, one side of the outer peripheral surface of the fuel inlet pipe is provided A horizontal branch interface and the branch interface communicates with the fuel inlet pipe, the branch interface is located in the fuel tank and is close to the top of the fuel tank, and the branch interface is provided with a pressure relief valve.
  • the valve is a one-way valve capable of and only allowing the air in the fuel inlet pipe to enter the fuel tank in one direction.
  • one end of the fuel inlet pipe in this technical solution is connected to the carburetor in a sealed manner, and the other end extends into the fuel of the fuel tank and is connected with the fuel filter, so that a closed environment is formed in the fuel inlet pipe, and the temperature is high after shutdown.
  • the lower carburetor and the fuel inlet pipe are easy to form air resistance.
  • the fuel inlet pipe is located above the fuel in the fuel tank and near the upper part of the fuel tank is equipped with a pressure relief valve.
  • the pressure relief valve is a one-way valve, which can control the high temperature and high pressure in the fuel inlet pipe.
  • the hot air is discharged into the atmosphere in the fuel tank through the pressure relief valve, so that the air pressure inside and outside the fuel inlet pipe is balanced, so that the air resistance in the fuel inlet pipe and the carburetor disappears.
  • the air resistance makes the fuel filter
  • the oil inlet hole of the closed filter element can also be opened to allow fuel to enter the oil inlet pipe, which makes it easier to start the gasoline engine, which increases the chance of the gasoline engine starting normally at high temperatures; when the oil engine is working normally, the oil inlet pipe will form first Vacuum.
  • the inside of the pressure relief valve also forms a vacuum.
  • the end of the pressure relief valve exhausted to the fuel tank will be flattened by the outside atmospheric pressure and completely closed.
  • the branch interface has a mounting hole, one end of the pressure relief valve is located in the branch interface, and the other end extends out of the branch interface and is located in the fuel tank Inside.
  • the installation hole is provided in the branch interface to facilitate the installation of the pressure relief valve.
  • One end of the pressure relief valve is connected with the oil inlet pipe in the branch interface, and the other end is in the environment where the fuel tank is open to the atmosphere, which facilitates exhaust and eliminates air resistance.
  • a vent hole extending to the inner wall of the oil intake pipe is opened in the branch interface, and the pressure relief valve is opened along its central axis with a vent that is connected to the vent hole. ⁇ .
  • the branch interface is provided with a vent hole and a pressure relief hole opened in the pressure relief valve to discharge the high temperature and high pressure gas in the oil inlet pipe.
  • the end of the inner end of the pressure relief valve is spherical and abuts against the end of the vent hole, and the pressure relief hole is located at the inner end of the pressure relief valve.
  • the port is an opening, the diameter of the pressure relief hole gradually decreases from the end of the branch interface to the outer end of the pressure relief valve, and the port of the pressure relief hole located at the outer end of the pressure relief valve is a constriction .
  • the end of the inner end of the pressure relief valve is spherical in order to squeeze the inner wall of the installation hole of the branch interface, so that the pressure relief valve is connected to the branch interface in a sealed manner.
  • the opening of one end of the pressure relief valve is connected with the end of the vent hole, and the other end It is designed to be constricted and located in the fuel to facilitate the discharge of the pressure relief valve and prevent the pressure relief valve from leaking when the gasoline engine is working normally.
  • the diameter of the opening on the pressure relief valve is smaller than the diameter of the vent hole. It is convenient to increase the discharge speed of hot air in the oil inlet pipe.
  • the oil intake pipe and the pressure relief valve are made of oil-resistant nitrile rubber. After the pressure relief valve and the branch interface on the oil inlet pipe are inverted and press-fitted, the tightness of the two is guaranteed
  • the present invention has the following advantages:
  • the fuel inlet pipe of the present invention is provided with a branch interface, and a pressure relief valve that is a one-way valve is sealed in the branch interface, which can discharge the high temperature and high pressure hot air in the fuel inlet pipe through the pressure relief valve, so that the gasoline engine is at a high temperature after shutdown. The probability of successful start-up is improved.
  • One end of the pressure relief valve in the present invention located in the branch interface is spherical, and the oil inlet pipe and the pressure relief valve are made of oil-resistant nitrile rubber, which can provide a guarantee for the tightness between the pressure relief valve and the branch interface.
  • the opening diameter of one end of the pressure relief valve is smaller than the diameter of the vent hole of the branch interface and the other end of the pressure relief valve is a contraction, so that the flow rate of the hot air in the intake pipe to the pressure relief valve is increased, which is convenient for the hot air Quickly discharge.
  • Figure 1 is a schematic structural diagram of the oil intake structure in the two-stroke gasoline engine and a partial enlarged structural diagram of the pressure relief valve in the oil intake structure at a high temperature after shutdown.
  • the fuel inlet structure of the two-stroke gasoline engine in this embodiment includes a carburetor 1, a fuel tank 2 and a hollow fuel inlet pipe 3.
  • One end of the fuel inlet pipe 3 is inserted into the carburetor 1, and the other end Inserted into the fuel tank 2 and fixedly connected with the fuel filter 4, the fuel inlet pipe 3 is located near the upper end of the inner wall of the fuel tank 2 with a horizontal branch interface 5, and the branch interface 5 is provided with a mounting hole 51 and communicates with the inner wall of the fuel inlet pipe 3.
  • a pressure relief valve 6 is inserted into the mounting hole 51.
  • the pressure relief valve 6 has a pressure relief hole 61 along its central axis.
  • the pressure relief hole 61 is opposite to the vent hole 52 in the branch interface 5 to relieve pressure.
  • One end of the valve is located in the mounting hole 51 on the branch interface 5 and the other end is located in the fuel tank 2 outside the branch interface 5.
  • the pressure relief valve 6 is a single valve that can only discharge the hot air in the fuel inlet pipe 3 into the fuel tank 2. In this way, the air pressure inside and outside the oil inlet pipe 3 can be balanced, and the probability of successful startup of the gasoline engine under high temperature conditions after shutdown is increased.
  • the oil inlet pipe 3 and the pressure relief valve 6 are made of oil-resistant nitrile rubber.
  • One end of the pressure relief valve 6 is spherical, and the pressure relief hole 61 is located at one end of the pressure relief valve 6 and the port is an opening 61a. 6
  • the hole diameter of the opening 61a is smaller than the hole diameter of the vent hole 52 of the branch interface 5.
  • the hole diameter of the pressure relief hole 61 gradually decreases from the end of the branch interface 5 to the other end of the pressure relief valve 6.
  • the pressure relief hole 61 is located in the pressure relief valve 6.
  • the port at the other end is a constriction 61b.
  • the pressure relief valve 6 and the oil inlet pipe 3 are made of the same material and have elasticity, which facilitates the sealed connection of the two.
  • the pressure relief valve 6 is located in a part of the installation hole 51 on the branch interface 5 and is set in a spherical shape. , Which provides a guarantee for the sealing connection between the pressure relief valve 6 and the fuel inlet pipe 3.
  • the high pressure inside the fuel inlet pipe 3 will open the relief valve 6 , The high-pressure air is discharged.
  • the drain valve 6 is closed.
  • the oil inlet pipe 3 will form a vacuum.
  • the pressure relief valve 6 will also close tighter due to the negative pressure.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une structure d'entrée de carburant d'un moteur à essence à deux temps, laquelle structure comprend un carburateur (1), un réservoir de carburant (2) et un tuyau d'entrée de carburant (3). Le tuyau d'entrée de carburant (3) a une extrémité reliée au carburateur (1) de manière hermétique, et l'autre extrémité insérée dans le réservoir de carburant (2) et s'étendant jusqu'au fond du réservoir de carburant (2), un filtre à essence (4) étant relié à une extrémité d'entrée de carburant du tuyau d'entrée de carburant (3), un orifice de liaison de ramification latéral (5) étant disposé sur un côté de la surface périphérique externe du tuyau d'entrée de carburant, et l'orifice de liaison de ramification (5) étant en communication avec le tuyau d'entrée de carburant (3), l'orifice de liaison de ramification (5) étant situé dans le réservoir de carburant (2) et étant proche du sommet du réservoir de carburant (2), l'orifice de liaison de ramification (5) comportant une soupape de surpression (6), et la soupape de surpression (6) étant une soupape unidirectionnelle permettant uniquement une entrée unidirectionnelle, dans le réservoir de carburant, d'air dans le tuyau d'entrée de carburant. Un verrou de vapeur formé par le gaz haute pression à haute température dans le carburateur et le tuyau d'entrée de carburant après l'arrêt du moteur à essence peut être déchargé, à travers la soupape de surpression, dans l'environnement du réservoir de carburant en communication avec l'atmosphère, améliorant la probabilité de démarrage normal du moteur à essence après l'arrêt.
PCT/CN2020/070022 2019-04-30 2020-01-02 Structure d'entrée de carburant d'un moteur à essence à deux temps WO2020220728A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910364655.XA CN110005556B (zh) 2019-04-30 2019-04-30 一种二冲程汽油机的进油结构
CN201910364655.X 2019-04-30

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WO2020220728A1 true WO2020220728A1 (fr) 2020-11-05

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110005556B (zh) * 2019-04-30 2024-04-09 浙江中马园林机器股份有限公司 一种二冲程汽油机的进油结构
CN114517741A (zh) * 2020-11-20 2022-05-20 上海汽车集团股份有限公司 一种发动机控制方法及装置、发动机控制***

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US7146968B2 (en) * 2005-03-17 2006-12-12 Keihin Corporation In-line type fuel supply device in fuel injection device
EP1537324B1 (fr) * 2002-08-29 2009-07-08 Robert Bosch Gmbh Dispositif pour ventiler une unite d'acheminement
CN206129464U (zh) * 2016-10-26 2017-04-26 众恒汽车部件有限公司 T型快速启动摩托车外置总成排气装置
CN207963977U (zh) * 2018-01-13 2018-10-12 重庆网锐科技发展有限公司 工程机械油耗仪排气构造
CN110005556A (zh) * 2019-04-30 2019-07-12 浙江中马园林机器股份有限公司 一种二冲程汽油机的进油结构
CN209800141U (zh) * 2019-04-30 2019-12-17 浙江中马园林机器股份有限公司 一种二冲程汽油机的进油结构

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JP4136213B2 (ja) * 1999-07-07 2008-08-20 愛三工業株式会社 燃料タンクモジュール
CN201155392Y (zh) * 2008-02-21 2008-11-26 成都汇普电器有限责任公司 一种无回油管路的燃油泵总成
CN101332769B (zh) * 2008-07-24 2011-09-14 江苏大学 一种车载汽油蒸气的回收装置及回收方法
CN104842579A (zh) * 2015-05-12 2015-08-19 天津太平洋超高压设备有限公司 粉末平板坯料的等静压模压液压机
CN207315516U (zh) * 2017-09-19 2018-05-04 福州大学 涡轮增压器润滑装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1537324B1 (fr) * 2002-08-29 2009-07-08 Robert Bosch Gmbh Dispositif pour ventiler une unite d'acheminement
US7146968B2 (en) * 2005-03-17 2006-12-12 Keihin Corporation In-line type fuel supply device in fuel injection device
CN206129464U (zh) * 2016-10-26 2017-04-26 众恒汽车部件有限公司 T型快速启动摩托车外置总成排气装置
CN207963977U (zh) * 2018-01-13 2018-10-12 重庆网锐科技发展有限公司 工程机械油耗仪排气构造
CN110005556A (zh) * 2019-04-30 2019-07-12 浙江中马园林机器股份有限公司 一种二冲程汽油机的进油结构
CN209800141U (zh) * 2019-04-30 2019-12-17 浙江中马园林机器股份有限公司 一种二冲程汽油机的进油结构

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