WO2008032975A1 - Dispositif d'aspiration d'air pour moteur à combustion interne - Google Patents

Dispositif d'aspiration d'air pour moteur à combustion interne Download PDF

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Publication number
WO2008032975A1
WO2008032975A1 PCT/KR2007/004388 KR2007004388W WO2008032975A1 WO 2008032975 A1 WO2008032975 A1 WO 2008032975A1 KR 2007004388 W KR2007004388 W KR 2007004388W WO 2008032975 A1 WO2008032975 A1 WO 2008032975A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
pipe
intake
engine
reverse
Prior art date
Application number
PCT/KR2007/004388
Other languages
English (en)
Inventor
Soo Won Kim
Original Assignee
Soo Won Kim
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 Soo Won Kim filed Critical Soo Won Kim
Publication of WO2008032975A1 publication Critical patent/WO2008032975A1/fr

Links

Classifications

    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/005—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10019—Means upstream of the fuel injection system, carburettor or plenum chamber
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10216—Fuel injectors; Fuel pipes or rails; Fuel pumps or pressure regulators
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/1017—Small engines, e.g. for handheld tools, or model engines; Single cylinder engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates, in general, to air intake devices for internal combustion engines and, more particularly, to an air intake device for an internal combustion engine which is able to accelerate the inflow of air into a cylinder of the engine and reduce intake resistance that is induced by pulsating waves at a valve overlap time, thus increasing the output of the engine, improving gas mileage, reducing the amount of exhaust fumes, and enhancing the traveling performance of the vehicle.
  • Background Art
  • the origin of the output of the engine is thermal energy generated in the combustion chamber in the cylinder of the engine.
  • the combustion chamber is defined in the head of the engine.
  • the engine obtains power through the operation of rapidly burning atomized fuel with air in the combustion chamber.
  • a larger amount of fuel should be burned, such that the energy generated per unit time is increased.
  • a larger amount of intake air is also required.
  • the output of the engine is in direct proportion to the amount of intake air. To increase the amount of intake air, it is required to increase the displacement of the cylinder, to improve the flow of air, or to increase the number of cylinders.
  • An air intake device provides a passage for supplying air, required in the combustion chamber, and is an important device for enhancing the durability of the engine.
  • intake pressure and exhaust pressure are respectively created in the air inlet side and the air outlet side as resistance to air flow.
  • valve overlap must be considered when designing the engine.
  • a tornado device for example, there are a tornado device, a cyclone device, a jet valve, a tur- bocharger, a supercharger and an intercooler.
  • a cam shaft which obtains a variable inertia effect at a valve overlap time, is also a representative example.
  • the present invention has been made keeping in mind the above problems occurring in the prior art, such as the occurrence of intake resistance in an intake system and a reduction in intake efficiency due to pulsating waves of reverse air, and the present invention has the following objects.
  • An object of the present invention is to provide an air intake device for an internal combustion engine which accelerates the inflow of air in an intake system to increase the density of intake air, and returns air, which flows backwards to an inlet of an intake filter due to a valve overlap and pulsating waves, to the engine, thus providing the pulsating effect and inertia effect of positive pressure, thereby enhancing the output of the engine.
  • Another object of the present invention is to provide an air intake device which can be used to reduce intake pressure in any engine, even if the engine has a complex structure having an additional device, such as a turbocharger or an intercooler, installed in the intake system, thus ensuring relatively high intake efficiency of the engine.
  • a further object of the present invention is to provide an air intake device which can prevent backfiring due to both a valve overlap and pulsating waves attributable to the reverse flow of air in a gasoline or diesel engine, particular, in an LPG engine.
  • Yet another object of the present invention is to provide an air intake device which returns reverse air towards the cylinder of the engine in an amount in proportion to the air intake force, responding to the RPM of the engine, thus reducing the intake pressure and intake noise.
  • Still another object of the present invention is to provide an air intake device which improves the flow of intake air of the engine and thus enhances the combustion efficiency of the engine, thereby increasing the output of the engine, improving gas mileage, reducing the amount of exhaust fumes, and enhancing the traveling performance of the vehicle.
  • the present invention provides an air intake device for an internal combustion engine which is provided in an intake system at a predetermined position or at each corresponding position in an intake manifold, which distributes intake air, and has therein a venturi pipe for accelerating intake air and a reverse air chamber, which forms a low pressure space therein using a venturi effect, in which reverse air is attracted to the intake air flowing through the venturi pipe, so that, when intake air flows towards the engine, reverse air, which causes pulsating waves, is drawn into the reverse air chamber, which is in the lower pressure state, and is returned to the combustion chamber through the venturi pipe without interfering with the flow of the intake air.
  • an air intake device provided in an intake system for supplying air to an internal combustion engine, including: a first pipe, provided at an air-in side in an intake path, through which the air is supplied into a combustion chamber of the engine, so as to form a venturi passage for increasing a flow speed of the air; and a second pipe, coaxially provided around an outer surface of the first pipe, wherein the second pipe defines a reverse air chamber, which is isolated from an atmosphere, between the first pipe and the second pipe, so that reverse air, flowing from the combustion chamber of the engine, enters the reverse air chamber, and the reverse air chamber communicates with an interior of the first pipe through at least one opening formed in the venturi passage of the first pipe.
  • the first pipe may have a diameter equal to a diameter of the air- in side of the intake path, and the first pipe and the second pipe may be spaced apart from each other by a separating space.
  • the reverse air, flowing from the combustion chamber of the engine, may be drawn into the reverse air chamber through the separating space.
  • capacities of the reverse air chamber, the venturi passage and the separating space may be set such that a relatively low pressure state is created in the reverse air chamber.
  • the first pipe may be constructed such that an outer diameter of an air-out end thereof is less than an outer diameter of an air- in end thereof, and the second pipe, surrounding the first pipe, may have an inner diameter suitable to fit the air-in side part of the first pipe into the second pipe.
  • the first pipe may have a ring-shaped flange around a circumferential outer surface of an end thereof, and the second pipe may comprise an intake bellows pipe coupled to the first pipe such that the reverse air chamber and the separating space are defined between the intake bellows pipe and the first pipe.
  • An air- in end of the first pipe may be connected to a discharge side pipe of an intake filter, and the intake bellows pipe may be coupled to an air-out end of the first pipe.
  • an intake system for an internal combustion engine in which the aforementioned air intake device may be installed at one position selected from a position between a cylinder head and an intake manifold, a position near an inlet of the intake manifold (before a surge tank), a middle position between an intake filter and the intake manifold, and a position immediately downstream of the intake filter.
  • the air intake device for an internal combustion engine in accordance with the present invention accelerates the inflow of air in an intake system to increase the density of intake air, and returns air that flows backwards toward an inlet of an intake filter due to a valve overlap and pulsating waves, to the engine, thus providing the pulsating effect and inertia effect of positive pressure, thereby enhancing the output of the engine.
  • the present invention can be used to reduce intake pressure in any engine, even if the engine has a complex structure having an additional device, such as a turbocharger or an intercooler, installed in the intake system, thus ensuring relatively high intake efficiency of the engine.
  • the present invention can prevent backfiring due to both valve overlap and pulsating waves, attributable to the reverse flow of air in a gasoline or diesel engine, in particular, in an LPG engine.
  • the present invention returns reverse air towards the cylinder of the engine in an amount in proportion to the air intake force, corresponding to the RPM of the engine, thus reducing the intake pressure and intake noise.
  • the present invention improves the flow of intake air of the engine and thus enhances the combustion efficiency of the engine, thereby increasing the output of the engine, improving gas mileage, reducing the amount of exhaust fumes, and enhancing the traveling performance of the vehicle.
  • FIG. 1 is a schematic view showing the construction of an internal combustion engine connected to intake and exhaust systems, illustrating a valve overlap state
  • FIG. 2 is a sectional view illustrating air flow in the intake system in accordance with an embodiment of the present invention
  • FIG. 3 is a sectional view illustrating air flow in an intake system in accordance with a modification of the embodiment of the present invention
  • FIG. 4 is a sectional view illustrating air flow in an intake system in accordance with another modification of the embodiment of the present invention.
  • FIG. 5 is a view illustrating an air intake device installed in the intake system of the engine in accordance with the present invention. Best Mode for Carrying Out the Invention
  • An air intake device 1 for an internal combustion engine in accordance with the embodiment of the present invention includes a first pipe 10, which is provided at an air-in side in an intake path, through which outside air is drawn into a combustion chamber of the engine, so as to form a venturi passage 15 for increasing the flow speed of air; and a second pipe 20, which coaxially surrounds the first pipe 10.
  • the second pipe 20 defines a reverse air chamber 22, which is isolated from the atmosphere, between it and the first pipe 10.
  • the second pipe 20 extends beyond the air-out end of the first pipe 10. Reverse air flow from the combustion chamber enters the reverse air chamber 22.
  • the first pipe 10 has almost the same diameter as that of the air-in side of the intake path.
  • the first pipe 10 and the second pipe 20 are spaced apart from each other by a separating space 24.
  • the reverse air chamber 22 has a capacity ranging from the exhaust capacity of one cylinder of the engine to the exhaust capacity of two cylinders thereof.
  • the venturi passage 15 of the first pipe 10 is provided by forming a protruding part
  • the reverse air chamber 22 communicates with the interior of the first pipe 10 through the opening 12 formed in the protruding part 14, which defines the venturi passage 15 of the first pipe 10.
  • the capacities of the reverse air chamber 22, the venturi passage 15 and the separating space 24 need to be designed in harmony with each other. These can be designed in various shapes, as long as the reverse air chamber 22 is able to form a relatively low pressure state therein due to outside air flowing through the first pipe.
  • the air intake device includes a first pipe 10a, which is constructed such that the outer diameter of an air-out side thereof is less than that of an air- in side thereof; and a second pipe 20a, which surrounds the first pipe 10a to isolate it from the atmosphere and has an inner diameter appropriate to securely fit the air-in side part of the first pipe 10a into the second pipe 20a. Furthermore, a separating space 24 is defined between the first pipe 10a and the second pipe 20a.
  • the air intake device in accordance with this modification has a function similar to the basic embodiment of FIG. 2, and facilitates a process of assembling the first pipe with the second pipe.
  • a ring-shaped flange 16 is provided on the outer surface of an end of a first pipe 10b. Furthermore, an intake bellows pipe 32, which is coupled to the first pipe 10b such that a reverse air chamber 22 and a separating space 24 are defined between the intake bellows pipe 32 and the first pipe 10b, is used as a second pipe 20b.
  • a discharge side pipe of a typical intake filter 31 is connected to an air- in end of the first pipe 10b.
  • the intake bellows pipe 32 is provided such that it extends beyond an air-out end of the first pipe 10b.
  • the air intake device 1, 1a may be disposed at a position selected depending on the structure of the engine, for example, a position between each cylinder head and an intake manifold, a position near an inlet of the intake manifold (just before a surge tank), a middle position between the intake filter and the intake manifold, or a position just after the intake filter.
  • the reference numeral 18 denotes a clamp band, which is typically used in a pipe connection.
  • the air intake device 1 of the present invention is installed in the intake system, which supplies air into the combustion chamber of the engine, such that both the air-in side and the air-out side thereof are isolated from the outside air.
  • the air intake device of the present invention prevents intake resistance from being induced by reverse air, which is generated by the discharge of combustion air from the combustion chamber at the valve overlap time and by pulsation attributable to the operation of the engine, and resupplies the reverse air into the cylinder, thus accelerating the inflow of outside air, thereby increasing the output of the engine.
  • FIGS. 3 and 4 have the same operation as that of the basic embodiment, and therefore redundant description therof will be omitted.
  • the present invention may be modified such that the air-out end of the first pipe 10 extends beyond the air-out end of the second pipe 20 while the separating space 24 remains therebetween. Further, to maintain the separating space 24, which is defined between the first and second pipes, which are welded to each other to have a double pipe structure, a separate support may be radially provided by welding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)

Abstract

Dispositif d'admission d'air pour moteur à combustion interne. Le dispositif considéré accélère l'admission d'air dans le moteur et réduit la résistance d'admission, induite par des ondes pulsatiles à un instant de chevauchement de valve, ce qui augmente le rendement du moteur. Ce dispositif comprend une première conduite, établie d'un côté entrée d'air sur un trajet d'entrée d'air de manière à former un passage venturi, et une seconde conduite, établie en position coaxiale autour de la première conduite. La seconde conduite définit une chambre d'air inverse entre elle-même et la première conduite, de sorte que l'air inverse, venant de la chambre de combustion du moteur, pénètre dans la chambre d'air inverse, laquelle communique avec l'intérieur de la première conduite via une ou plusieurs ouvertures formées dans le passage venturi de la première conduite.
PCT/KR2007/004388 2006-09-12 2007-09-11 Dispositif d'aspiration d'air pour moteur à combustion interne WO2008032975A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2006-0087958 2006-09-12
KR1020060087958A KR100786297B1 (ko) 2006-09-12 2006-09-12 엔진 흡기장치

Publications (1)

Publication Number Publication Date
WO2008032975A1 true WO2008032975A1 (fr) 2008-03-20

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PCT/KR2007/004388 WO2008032975A1 (fr) 2006-09-12 2007-09-11 Dispositif d'aspiration d'air pour moteur à combustion interne

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KR (1) KR100786297B1 (fr)
WO (1) WO2008032975A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2015056479A1 (ja) * 2013-10-18 2017-03-09 日産自動車株式会社 内燃機関の吸気通路構造
DE102016102769A1 (de) 2016-02-17 2017-08-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Leitelement für eine Druckanlage einer Verbrennungskraftmaschine, Druckanlage für einen Ansaugtrakt einer Verbrennungskraftmaschine und Verbrennungskraftmaschine mit einer Aufladeeinheit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103867288A (zh) * 2014-03-05 2014-06-18 刘华 一种内燃机可变回压进气谐振器
KR102011888B1 (ko) * 2017-01-25 2019-08-19 유병남 내연기관용 유체흐름 조절장치 및 이를 포함하는 체크밸브
JP7195719B1 (ja) 2022-09-06 2022-12-26 浩彰 保田 エンジン吸気部品及びそれを備えるエンジン吸気管

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153851A (en) * 1979-05-16 1980-12-01 Hitachi Ltd Supplying device of mixed gas
US4457267A (en) * 1983-09-16 1984-07-03 Forward Motion, Inc. Kinetic energy injector--method and apparatus for improving the performance and efficiency of a two-cycle internal combustion engine
US4545347A (en) * 1983-05-12 1985-10-08 Fuji Jukogyo Kabushiki Kaisha Intake system for an automotive engine
US4550700A (en) * 1980-12-22 1985-11-05 Yamaha Hatsudoki Kabushiki Kaisha Intake system for multi-intake valve type engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63183327U (fr) 1987-05-11 1988-11-25
KR100196467B1 (ko) * 1997-02-12 1999-06-15 허찬회 다기통 내연기관의 흡배기장치
KR20030072846A (ko) * 2002-03-07 2003-09-19 소봉춘 자동차용 엔진의 역류가스 제어장치
KR100684568B1 (ko) * 2004-10-29 2007-02-22 김수원 자동차용 배기구

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153851A (en) * 1979-05-16 1980-12-01 Hitachi Ltd Supplying device of mixed gas
US4550700A (en) * 1980-12-22 1985-11-05 Yamaha Hatsudoki Kabushiki Kaisha Intake system for multi-intake valve type engine
US4545347A (en) * 1983-05-12 1985-10-08 Fuji Jukogyo Kabushiki Kaisha Intake system for an automotive engine
US4457267A (en) * 1983-09-16 1984-07-03 Forward Motion, Inc. Kinetic energy injector--method and apparatus for improving the performance and efficiency of a two-cycle internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2015056479A1 (ja) * 2013-10-18 2017-03-09 日産自動車株式会社 内燃機関の吸気通路構造
DE102016102769A1 (de) 2016-02-17 2017-08-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Leitelement für eine Druckanlage einer Verbrennungskraftmaschine, Druckanlage für einen Ansaugtrakt einer Verbrennungskraftmaschine und Verbrennungskraftmaschine mit einer Aufladeeinheit
US10294899B2 (en) 2016-02-17 2019-05-21 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Guide element for a pressure system of an internal combustion engine, pressure system for an intake tract of an internal combustion engine, and internal combustion engine with a supercharging unit

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