WO2008136641A1

WO2008136641A1 - Air supercharger and air supercharging system for engine

Info

Publication number: WO2008136641A1
Application number: PCT/KR2008/002567
Authority: WO
Inventors: Seong-Wan Kim
Original assignee: Xyvec Inc.
Priority date: 2007-05-08
Filing date: 2008-05-07
Publication date: 2008-11-13
Also published as: WO2008136641A4; KR20080099002A

Abstract

An air supercharger includes: a pipe-shaped inflow guide that guides air inflow; a pipe-shaped outflow guide that is communicated with the inflow guide; and an amplifier that is provided between the inflow guide and the outflow guide and that includes a suction hole that is opened to the outside of an external circumferential surface to inject gas, a distribution passage that is connected to the suction hole and that is formed in a circumferential direction of the outflow guide, and an induction passage that connects the distribution passage and the inside of the outflow guide and that draws air from the inflow guide while discharging gas that is injected from the suction hole to the outflow guide.

Description

[DESCRIPTION] [Invention Title] AIR SUPERCHARGER AND AIR SUPERCHARGING SYSTEM FOR ENGINE

[Technical Field] The present invention relates to an air supercharger and an air supercharging

system. More particularly, the present invention relates to an air supercharger and an air supercharging system that increases a supply amount of air in order to improve efficiency of an internal combustion engine.

[Background Art] An engine draws mixed air or air by negative pressure within a cylinder that is generated at an intake stroke of a piston. That is, at an intake stroke of the piston, the

interior of the cylinder develops a pressure that is lower than atmospheric pressure and thus mixed air is forced into the cylinder by atmospheric pressure. This is called natural aspiration or normal aspiration. Mixed air that is drawn by an engine is in a standard atmospheric pressure state, and an amount of fuel that can be burned in the cylinder is determined by an amount of air that is forced therein by atmospheric pressure. If additional mixed air is supplied to the cylinder, the engine can generate more power at the same speed. Such supercharged mixed air generates a high pressure for a combustion stroke and improves the output of the engine.

However, because a valve is opened for a short time period, air cannot be fully drawn therein, which causes a problem of insufficient air being drawn into the cylinder. In order to solve this problem, conventionally, a method of compressing air by an air compressor or a method in which a turbocharger compresses and supplies mixed air has been used.

However, because a method of compressing air by the air compressor that is connected to a crankshaft of an engine through a belt pulley is driven by torque of the engine, output of the engine is deteriorated. Further, because power is transmitted from the crankshaft of the engine, power is used even at idle or at high-speed rotation, so that much fuel is consumed. Because the engine has a structure of compressing air by a separate driving apparatus, if the output of the engine increases to a predetermined level or more, it is difficult to inject a necessary amount of air, whereby an increase of output thereof is suppressed. A method of rotating a turbocharger with exhaust gas of the engine and allowing the turbocharger to compress and supply mixed air is ineffective at low velocity rotation such as city driving, and once acceleration slows, rotation of the turbocharger is rapidly deteriorated. Further, because a predetermined time period is necessary until air is compressed, a turbo lag phenomenon occurs and thus when a vehicle starts moving, initial power is low.

In addition, in such a conventional method, when compressing air, the temperature of the air rises and thus a separate intercooler for cooling compressed air is necessary. When providing the intercooler, the production cost increases and the weight of a vehicle increases such that performance of the vehicle is deteriorated. The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. [Disclosure] [Technical Problem]

The present invention has been made in an effort to provide an air supercharger

and an air supercharging system having advantages of supercharging air by an internal combustion engine without delaying an increase of output as well as not generating a

load during high output.

The present invention has been made in an effort to further provide an air supercharger and an air supercharging system having advantages of supercharging an

internal combustion engine using a sufficient amount of air without providing a separate

cooling apparatus.

[Technical Solution]

An exemplary embodiment of the present invention provides an air

supercharger including: a pipe-shaped inflow guide that guides air inflow; a pipe-shaped

outflow guide that is communicated with the inflow guide; and an amplifier that is

provided between the inflow guide and the outflow guide and that includes a suction hole that is opened to the outside of an external circumferential surface to inject gas, a distribution passage that is connected to the suction hole and that is formed in a

circumferential direction of the outflow guide, and an induction passage that connects

the distribution passage and the inside of the outflow guide and that draws air from the inflow guide while discharging gas that is injected from the suction hole to the outflow guide.

The air supercharger may include: an external body that includes the inflow guide and a pipe-shaped reception part that is connected to the inflow guide; and a pipe-shaped internal body that includes a step part that is inserted into the reception part and that has a smaller external diameter than an interior diameter of the reception part in an external circumferential surface, and that thus forms the distribution passage, that forms an axial gap between the pipe-shaped internal body and an external body, and that forms the guide passage.

The inflow guide may have an interior diameter that gradually decreases along a flow direction of injected air, and an internal circumference surface of the inflow guide may be convexly curved toward the center of a shaft.

A plurality of protrusions may be formed in an axial gap that is formed between the external body and the internal body to form a plurality of guide passages.

The plurality of guide passages may be disposed apart from each other along an internal circumference of the reception part, the plurality of protrusions may be arranged toward a shaft center of the reception part, and the plurality of protrusions may be arranged toward a direction that is deviated from the shaft center of the reception part.

The protrusions may be formed in an external body, or in a front end surface of the internal body, and the protrusions may be formed to be protruded from an internal circumference surface of a separate ring-shaped separation member. A thickness of the separation member may be in a range of 0.03mm to 0.15mm.

The air supercharger may further include a first surface of the external body and a second surface of the internal body that face each other with the guide passage interposed therebetween within the reception part of the external body, wherein the first surface may be formed perpendicularly to a center shaft of the reception part and at least a part of the second surface may form a curved surface that is bent toward the outflow guide, and the outflow guide may have an interior diameter that gradually increases along an air flow direction. A hooking jaw may be formed at an edge of the external body. The external body may have a convex part that is protruded toward the outside of an external circumferential surface corresponding to the reception part. The external body and the internal body may be coupled by compression inserting. Another embodiment of the present invention provides an air supercharging system for an internal combustion engine that is connected to an internal combustion engine to amplify air inflow, including: an air supply pipe that supplies air to the internal combustion engine; an air supercharger that is connected to the air supply pipe; a gas discharge pipe that is connected to the internal combustion engine to provide a passage for discharging exhaust gas; and a gas supply pipe that is connected to the gas discharge pipe and the air supercharger to supply exhaust gas to the air supercharger.

A check valve may be provided in the gas supply pipe, a muffler may be provided in the gas discharge pipe, and the gas supply pipe may be provided between the muffler and the internal combustion engine. A branch member may be provided in a connection portion of the gas discharge pipe and the gas supply pipe, the branch member may have a first through-hole in a gas discharge direction, and a second through-hole may be formed in a connecting direction of the gas supply pipe at the side of the first through-hole.

In this case, in the first through-hole of the branch member, an aperture of an outlet side thereof may be smaller than that of an inlet side thereof. Further, the branch member may include an extension pipe that is protruded from the outlet side of the first through-hole and an orifice that is formed in an end part of the extension pipe. Further, a gasket may be provided between the gas discharge pipe and the branch member, a hole that is connected to the first through-hole may be formed in the gasket, and a hole of the gasket that is provided adjacent to an outlet of the first through-hole may have a smaller diameter than that of the first through-hole.

Yet another embodiment of the present invention provides an air supercharging system for an internal combustion engine, including: a turbocharger that promotes inflow of air by rotating a turbine with exhaust gas that is discharged from the internal combustion engine; and an air supercharger that is connected to a gas supply pipe that is connected to an outlet side of the internal combustion engine to receive exhaust gas and that is communicated to the turbocharger to amplify air inflow and to supply the air to the internal combustion engine. An intercooler for cooling compressed air may be provided between the turbocharger and the air supercharger.

A further embodiment of the present invention provides an air supercharging system for an internal combustion engine, including: an air supply pipe that supplies air to the internal combustion engine; an air supercharger that is connected to the air supply pipe; a compressed air guide pipe that is connected to the air supercharger to supply compressed air to the air supercharger; and an air compressor that is provided in the compressed air guide pipe to compress air that is injected into the internal combustion engine.

The air compressor may be connected to a shaft of the internal combustion engine for driving, or may be electrically connected to a battery of a vehicle. [Advantageous Effects]

As described above, because an air supercharger and an air supercharging system according to the present invention do not cause air resistance even under full acceleration driving, a sufficient amount of air can be supplied to an internal combustion engine at a high number of revolutions per minute (RPM) and thus the output of the internal combustion engine can be improved.

Further, in a turbocharger, when a turbo lag phenomenon occurs, because much fuel is supplied but air is insufficiently supplied, there has been a problem that smoke is generated, but because an air supercharger and an air supercharging system according to the present invention supplies a sufficient amount of air when starting out, smoke can be reduced.

In addition, because the air supercharger and the air supercharging system according to the present invention injects 25 times the amount of air than the amount of injected exhaust gas without compressing the air, it is unnecessary to lower the intake air temperature using an intercooler, and components of the exhaust gas are diluted, so that sustained performance of the internal combustion engine can be improved.

Because the air supercharger and the air supercharging system according to the present invention amplify an air supply amount to the internal combustion engine immediately upon acceleration and are operated in synchronization with an exhaust amount, a problem that an air amount is deficient when the output thereof increases can be solved.

In the air supercharger and the air supercharging system according to the present invention, some exhaust gas is recovered and is supplied to an inlet and the exhaust gas promotes inflow of mixed air so that the output thereof increases, and a poisonous component content of exhaust gas such as SOx, NOx, and CO within the exhaust gas can be reduced.

Because the air supercharger and the air supercharging system according to the present invention has a distribution passage and an inflow passage and uniformly supply exhaust gas, the output of the internal combustion engine can be improved.

Because the air supercharger and the air supercharging system according to the

present invention have a spiral protrusion and easily mix exhaust gas and air, the output of the internal combustion engine can be improved.

In the air supercharger according to the present invention, a hooking jaw is formed in an outer surface thereof to be stably coupled to the air inflow pipe.

[Description of Drawings]

FIG. 1 is an exploded perspective view illustrating an air supercharger

according to a first exemplary embodiment of the present invention. FIG. 2 is a partially cut-away perspective view illustrating an air supercharger according to a first exemplary embodiment of the present invention.

FIG. 3 is an axial cross-sectional view illustrating an air supercharger according to a first exemplary embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a configuration of an air supercharging system for an internal combustion engine in which the air supercharger is provided according to a first exemplary embodiment of the present invention.

FIG. 5 is an exploded perspective view of a portion in which a branch member is applied to an air supercharging system for an internal combustion engine in which an air supercharger is provided according to a first exemplary embodiment of the present invention.

FIG. 6 is an exploded perspective view of a portion in which a branch member is applied to an air supercharging system for an internal combustion engine according to a first exemplary variation of the first exemplary embodiment.

FIG. 7 is a cross-sectional view illustrating a coupled state of members that are shown in FIG. 6.

FIG. 8 (a) is a cross-sectional view illustrating a portion in which a branch member is applied to an air supercharging system for an internal combustion engine according to a second exemplary variation of the first exemplary embodiment, and FIG. 8 (b) is a pressure diagram illustrating an internal pressure of a pipe that is shown in

FIG. 8 (a).

FIG. 9 is an exploded perspective view of a portion to which a gasket is applied according to an exemplary variation of the first exemplary embodiment when a branch member is applied to an air supercharging system for an internal combustion engine. FIG. 10 is a cross-sectional view illustrating a coupled state of members that are shown in FIG. 9.

FIG. 11 is a top plan view illustrating a separation member that is applied to an air supercharger according to a first exemplary embodiment of the present invention.

FIG. 12 is a top plan view illustrating an exemplary variation of a separation member according to a first exemplary embodiment.

FIG. 13 is an exploded perspective view illustrating an air supercharger according to a second exemplary embodiment of the present invention.

FIG. 14 is an exploded perspective view illustrating an air supercharger according to a third exemplary embodiment of the present invention. FIG. 15 is a cross-sectional view illustrating an air supercharger according to a fourth exemplary embodiment of the present invention.

FIG. 16 is a cross-sectional view illustrating an air supercharger according to a fifth exemplary embodiment of the present invention.

FIG. 17 is a schematic diagram illustrating a configuration of an air supercharging system for an internal combustion engine according to a sixth exemplary embodiment of the present invention.

FIG. 18 is a schematic diagram illustrating an air supercharging system for an internal combustion engine according to a seventh exemplary embodiment of the present invention.

[Mode for Invention]

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. The drawings and description are to be regarded as illustrative in nature and not restrictive. Like reference numerals designate like elements throughout the specification.

FIG. 1 is an exploded perspective view illustrating an air supercharger according to a first exemplary embodiment of the present invention.

Referring to FIG. 1, an air supercharger 100 according to the present exemplary embodiment includes an external body 110 including an inflow guide 112 that has a reducing internal cross-section in an air advancing direction (y-axis direction of FIG. 1) and a reception part 114 that is connected to the inflow guide 112 and in which a suction hole 116 for injecting gas is formed, an internal body 120 that is inserted into the reception part 114 and in which a step part 121 is formed along an external circumferential surface, and a plurality of protrusions 134 that are provided between the external body 110 and the internal body 120.

FIG. 2 is a partially cut-away perspective view illustrating an air supercharger according to a first exemplary embodiment of the present invention, and FIG. 3 is an axial cross-sectional view thereof.

Referring to FIGS. 2 and 3, the external body 110 is formed in a pipe structure having an external shape of a cylinder, and includes the inflow guide 112 that is disposed at the front and the reception part 114 that is disposed at the rear of the inflow guide 112.

The inflow guide 112 has a gradually reducing interior diameter in the air advancing direction (y-axis direction of FIG. 2) from a front end and includes, for example, an internal circumference surface 112a having a convexly curved surface toward a shaft center. Accordingly, the speed of air passing through the inflow guide

112 is increased and a pressure thereof is lowered.

The internal circumference surface 112a of the inflow guide 112 is connected to a support surface 112b, and the support surface 112b connects the internal circumference surface 112a and the reception part 114 and is formed perpendicular to a center shaft of the reception part 114.

The reception part 114 is formed in a cylindrical pipe structure having a space into which the internal body 120 is inserted, and the suction hole 116 is positioned at the front of the reception part 114 and is opened to the outside of an external circumferential surface, from where it injects gas. In this case, gas that is injected through the suction hole 116 is compressed gas at a higher pressure than atmospheric pressure. Further, the suction hole 116 is connected to a gas supply pipe 270 (shown in FIG. 4) and performs a function as a passage for supplying exhaust gas into the reception part 114.

The internal body 120 is formed in a cylindrical pipe structure that is inserted into the reception part 114 and has the step part 121 at the front thereof, as shown in FIG. 1. The step part 121 has a smaller exterior diameter than an interior diameter of the reception part 114 and is formed along an external circumference of the internal body 120. As shown in FIG. 2, a space is formed between the step part 121 and the reception part 114, and the space is called a distribution passage 125. The distribution passage 125 is connected to the suction hole 116, and gas that is injected through the suction hole 116 may flow along an external circumference of the internal body 120.

As shown in FIG. 1, the protrusions 134 for separating the external body 110 and the internal body 120 in an axial direction are provided between the external body 110 and the internal body 120, and the protrusions 134 are protruded from an internal circumference surface of a ring-shaped separation member 130.

That is, the separation member 130 includes a support 132 and protrusions 134, and the protrusions 134 are protruded toward the center C of the support 132 and are arranged apart from each other by a predetermined space along an internal circumference surface of the support 132. The support 132 is separated from the internal body 120 and is provided to contact the internal surface of the reception part 114, and the front end of the internal body 120 is provided to contact the protrusions 134.

As shown in FIG. 2, when the external body 110 and the internal body 120 are separated by the protrusions 134, a guide passage 127 for injecting gas is formed between neighboring protrusions 134. A plurality of guide passages 127 are formed apart from each other along the front end of the internal body 120, and gas is injected into an outflow guide 123 through the guide passages 127.

According to the present exemplary embodiment, a plurality of protrusions 134 are disposed apart from each other, and because gas is supplied to the space between the protrusions 134, gas may be uniformly divided and injected into the air supercharger 100.

It is preferable that the thickness of the separation member 130 is in a range of 0.03mm to 0.15mm. When the thickness of the separation member 130 is smaller than 0.03mm, because the amount of exhaust gas that is injected into the air supercharger 100 is so less, there is a problem in that exhaust gas is not properly ejected. When the thickness of the separation member 130 is greater than 0.15mm, because the cross-section of the guide passage 127 increases, there is a problem in that ejection speed of exhaust gas becomes too slow. Further, each separation member 130 preferably has a thickness of 0.05mm to 0.08mm. By setting the thickness of the separation member 130 as such, the external body 110 and the internal body 120 can be separated in an axial direction to sustain a gap and form the guide passage 127.

When the surfaces of the facing external body 110 and the internal body 120 with the guide passage 127 interposed therebetween within the reception part 114 of the external body 110 are respectively referred to as a first surface and a second surface, the first surface is formed perpendicular to a central shaft of the reception part 114 and at least a part of the second surface forms a curved surface 126 that is bent toward the outflow guide 123. In this case, as the second surface is first bent while the first surface and the second surface advance toward the center shaft while sustaining a predetermined gap, the injected gas can be guided toward the outflow guide 123 (see an enlarged view within a circle of FIG. 3).

The pipe-shaped outflow guide 123 is formed at the rear side of the curved surface 126, and the outflow guide 123 has a gradually increasing interior diameter when advancing in an air advancing direction (y-axis direction of FIG. 2) from the curved surface 126. A minimum interior diameter of the curved surface 126 may be formed to be equal to that of the outflow guide 123, and thus air that is injected along the inflow guide 112 is stably discharged along the outflow guide 123. Exhaust gas that is injected into the internal body 120 flows toward the outflow guide 123 along the curved surface 126 by a Coanda effect. The Coanda effect represents that fluid flows in a direction that spends its energy to the minimum, and when a bent pipe appears in front of a direction in which fluid flows, fluid flows along the bent pipe. Accordingly, the direction in which fluid will flow can be previously estimated.

When the curved surface 126 is formed at a portion in which the guide passage 127 and the outflow guide 123 meet, exhaust gas can be easily guided toward the outflow guide 123.

The air supercharger 100 according to the present exemplary embodiment is made of a material having excellent durability such as stainless steel, aluminum, and engineering plastic that can have high corrosion resistance and endure a high temperature.

The external body 110 and the internal body 120 may be coupled by compression fitting or by welding and so on in a state where the internal body 120 is inserted into the external body 110, and may be coupled through screw coupling by forming a female thread at an internal circumference surface of the reception part 114 of the external body 110 and forming a screw thread in an external circumferential surface of the internal body 120.

Due to such a structure, gas can be injected into the air supercharger 100 through the suction hole 116, the distribution passage 125, and the guide passage 127. Further, as gas having a high pressure is injected into the air supercharger 100, a vacuum space V is formed at the rear side of the guide passage 127. Due to such vacuum space, inflow of mixed air is amplified, and air of about 25 times that of gas that is injected into the suction hole 116 may be injected into the air supercharger 100.

An internal combustion engine that is supercharged with mixed air improves the output thereof by generating a high pressure for an expansion stroke and can generate more power by 35% to 60% than a natural air suction internal combustion engine. Further, in the air supercharger according to the present exemplary embodiment, because the air temperature does not rise due to compression, it is unnecessary to provide an intercooler, and because gas that is injected into the suction hole 116 is mixed with a large amount of air, the temperature thereof is lowered and components thereof are diluted, so that a heavy burden is not imposed on an internal combustion engine.

FIG. 4 is a schematic diagram illustrating a configuration of an air supercharging system for an internal combustion engine in which the air supercharger is provided according to a first exemplary embodiment of the present invention. In FIG. 4, an internal combustion engine of a cylinder structure is shown, but the present invention is not limited thereto and includes all internal combustion engines for drawing and discharging air through an inlet and an outlet.

Referring to FIG. 4, the air supercharging system 200 includes an inflow pipe 240 for supplying air to an internal combustion engine 210, an air supercharger 100 that is connected to the inflow pipe 240, a discharge pipe 230 that is connected to the internal combustion engine 210 to discharge exhaust gas to the outside, and a gas supply pipe 270 that is connected to the discharge pipe 230 to guide exhaust gas to the air supercharger 100.

The air supercharger 100 is connected to the inflow pipe 240 of the internal combustion engine 210 in order to supply more air to the internal combustion engine 210, and an air filter 260 for purifying air that is injected into the internal combustion engine 210 is provided at the front of the air supercharger 100.

In the discharge pipe 230 that is connected to the internal combustion engine

210 to discharge exhaust gas, a catalytic converter 251, an intermediate muffler 253, and a final muffler 255 are sequentially provided. The mufflers 253 and 255 perform a function of reducing noise and sustaining a pressure of exhaust gas to a predetermined level.

A branch member 235 for connecting the discharge pipe 230 and the gas supply pipe 270 is provided between the catalytic converter 251 and the intermediate muffler 253. The branch member 235 supplies some exhaust gas to the air supercharger 100 through the gas supply pipe 270 and performs a function of distributing exhaust gas in order to discharge the remaining exhaust gas through the discharge pipe 230.

In the present exemplary embodiment, although the branch member 235 is provided between the catalytic converter 251 and the intermediate muffler 253, the present invention is not limited thereto. Therefore, the branch member 235 may be provided between the internal combustion engine 210 and the catalytic converter 251, between the intermediate muffler 253 and the final muffler 255, or at the rear of the final muffler 255.

In the gas supply pipe 270, a check valve 280 that controls a transfer direction and a supply amount of exhaust gas may be provided.

If exhaust gas is always supplied to the air supercharger 100, because fuel can be wasted, supply of exhaust gas can be adjusted by providing the check valve 280 at the gas supply pipe 270. Further, the check valve 280 also performs a function of a one-way valve for moving exhaust gas only to the air supercharger 100.

When the internal combustion engine 210 is started, air that is filtered through the air filter 260 is injected into the internal combustion engine 210, and exhaust gas from an exhaust stroke is discharged through the discharge pipe 230. In this case, some exhaust gas is discharged to the outside through the muffler 250, and the remaining exhaust gas is injected into the air supercharger 100 through the gas supply pipe 270. When exhaust gas is injected into the air supercharger 100, injection of air is promoted and thus more air can be supplied to the internal combustion engine.

FIG. 5 is an exploded perspective view of a portion in which a branch member is applied to an air supercharging system for an internal combustion engine. In order to branch the gas supply pipe 270 from the discharge pipe 230, the branch member 235 that is shown in FIG. 5 may be used. The branch member 235 is provided at a connection portion of the discharge pipe 230 and the gas supply pipe 270, a first through-hole 237 is formed in a gas discharge direction, and a second through-hole 239 is formed in a connecting direction of the gas supply pipe 270 at the side of the first through-hole 237.

By interposing gaskets 232 and 234 between the discharge pipe 230 and the branch member 235, a sealed state can be secured, and they can be coupled by fastening with a bolt and a nut.

FIG. 6 is an exploded perspective view of a portion in which a branch member is applied to an air supercharging system for an internal combustion engine according to a first exemplary variation of the first exemplary embodiment, and FIG. 7 is a cross-sectional view illustrating a coupled state of members that are shown in FIG. 6.

As shown in FIGS. 6 and 7, in a branch member 235', a convex jaw 236 that is inwardly protruded to be adjacent to an outlet 237'b is formed in the rear side (a flow direction of exhaust gas) of the second through-hole 239, and an aperture of an outlet 237'b of the first through-hole 237' is formed to be smaller than that of an inlet 237'a thereof. The convex jaw 236 increases pressure by disturbing the advance of exhaust gas, and thus exhaust gas can be injected into a gas supply pipe 270 through the second through-hole 239 at a higher pressure.

FIG. 8 (a) is a cross-sectional view illustrating a portion at which a branch member is applied to an air supercharging system for an internal combustion engine according to a second exemplary variation of the first exemplary embodiment, and FIG. 8 (b) is a pressure diagram of pressure in the branch member of FIG. 8 (a). As shown in FIG. 8(a), the branch member 233 includes an extension pipe 233a that is extended from an outlet side of a first through-hole 237" and that is inserted into the discharge pipe 230, and an orifice 233b that is formed at the end of the extension pipe 233a. The exterior diameter of the extension pipe 233a is formed to be approximately the same as the interior diameter of the discharge pipe 230, and the interior diameter of the extension pipe 233 a may be formed to be the same as the aperture of the first through-hole 237" of the branch member 233. Because the aperture of the orifice 233b is smaller than the interior diameter of the extension pipe 233 a, the aperture of the orifice 233b disturbs the flow of exhaust gas within the discharge pipe 230, thereby increasing the pressure the inside the discharge pipe 230. The extension pipe 233a protrudes in the flow direction of the fluid to be inserted so that an external circumferential surface thereof may contact the discharge pipe 230 and allows the orifice 233b to be apart from the second through-hole 239.

The pressure diagram of FIG. 8 (b) is a diagram illustrating pressure distribution varying in an x-direction in a cross-sectional view of FIG. 8 (a), wherein the dotted line indicates pressure distribution of a case where the orifice 233b is not provided, and he solid line indicates pressure distribution of a case where the orifice

233b is provided. In the pressure diagram, because the orifice 233b disturbs gas flow, internal pressure of the discharge pipe 230 and the branch member 233 increases. Further, at a portion in which the orifice 233b is provided, the pressure abruptly changes.

In the present exemplary embodiment, by providing the orifice 233b apart by a predetermined distance from the second through-hole 239, the pressure around the second through-hole 239 can be stabilized. Accordingly, gas having a uniform pressure can be stably supplied in an appropriate amount though the second through-hole 239.

The orifice 233b is provided apart by a distance of two to five times the interior diameter of the orifice 233b from the second through-hole 239. If the orifice 233b is provided apart by a distance of less than two times the interior diameter of the orifice 233b from the second through-hole 239, the pressure applied to the second through-hole 239 is non-uniformly formed, and if the orifice 233b is provided apart by a distance of more than five times the interior diameter of the orifice 233b from the second through-hole 239, there is a problem that the branch member is inconveniently provided and material is wasted.

More preferably, the orifice is provided apart by a distance of four times the interior diameter of the orifice from the second through-hole.

FIG. 9 is an exploded perspective view of a portion to which a gasket is applied according to an exemplary variation of the first exemplary embodiment when a branch member is applied to an air supercharging system for an internal combustion engine, and FIG. 10 is a cross-sectional view illustrating a coupled state of members that are shown in FIG. 9.

As shown in FIGS. 9 and 10, gaskets 232' and 234' are provided between the branch member 235 and the discharge pipe 230, including a front gasket 232' that is provided at the front (a flow direction of exhaust gas) of the branch member 235 and a rear gasket 234' that is provided at the rear (a flow direction of exhaust gas) of the branch member 235. Holes 232'a and 234'a for passing through exhaust gas are formed in the gaskets 232' and 234', and the hole 234'a that is formed in the rear gasket

234' has a smaller diameter than the first through-hole 237 of the branch member 235.

Due to such a structure, the rear gasket 234' performs a function of increasing pressure by disturbing the advance of exhaust gas, and thus exhaust gas can be injected into the gas supply pipe 270 through the second through-hole 239 with a higher pressure.

FIG. 11 is a top plan view illustrating a separation member that is applied to an air supercharger according to a first exemplary embodiment of the present invention, and FIG. 12 is a top plan view illustrating an exemplary variation of the separation member.

Referring to FIG. 11, a separation member 130 according to the present exemplary embodiment includes a ring-shaped support 132 and a plurality of protrusions 134 that are protruded from an internal circumference surface thereof, and the protrusions 134 are arranged toward the center C of the support 132. The protrusions 134 contribute to ejecting gas that is injected through the suction hole 116 at a high speed toward a center shaft of the reception part 114 while forming the guide passage 127 of the air supercharger 100 according to the present exemplary embodiment. Referring to FIG. 12, the separation member 330 includes a ring-shaped support

332 and a plurality of protrusions 334 that are protruded from an internal circumference surface of the support 332. In the separation member 330 according to the exemplary variation, the protrusions 334 are arranged toward a direction that is deviated from the center of the support 332. That is, the protrusions 334 is formed to be inclined to an internal circumference of the support 332 by a preset angle (α).

When the injected gas is ejected through a guide passage that is formed by the protrusions 334, the ejected gas flows toward a center shaft of the reception part 114 while forming a vortex. When the exhaust gas induces a vortex, the exhaust gas and mixed air can be more easily mixed. FIG. 13 is an exploded perspective view illustrating an air supercharger according to a second exemplary embodiment of the present invention.

Referring to FIG. 13, an air supercharger 400 according to the second exemplary embodiment includes an external body 410 including an inflow guide 412 that has a reducing internal cross-section in an air advancing direction and a reception part 414 that is connected to the inflow guide 412 and in which a suction hole 416 is formed, and an internal body 420 including a step part 421 that is inserted into the reception part 414 and that is formed along an external circumference surface, and a plurality of protrusions 425 that are formed in a front end surface thereof.

The external body 410 is formed in a pipe structure having an external shape of a cylinder, the inflow guide 412 has a reduced interior diameter as the internal surface thereof is inwardly protruded when advancing toward the reception part 414, and the reception part 414 has a pipe structure that is communicated with the inflow guide 412.

The internal body 420 includes the step part 421 that is formed at an external circumference and a pipe-shaped outflow guide 423 that is formed at the inside thereof.

The step part 421 forms a space between the reception part 414 and the internal body

420, and the outflow guide 423 has an increasing interior diameter in the air advancing direction.

The plurality of protrusions 425 are formed apart by a predetermined space along a cylinder direction at the front end surface (the surface toward the external body) of the internal body 420. The protrusions 425 separate the internal body 420 and the external body 410 from each other to form passages between the protrusions 425 and inject exhaust gas into the outflow guide 423 through the passages.

In the present exemplary embodiment, the protrusions 425 are formed in a front end surface of the internal body 420 and thus it is unnecessary to provide a separate separation member, so the manufacturing process is simplified.

FIG. 14 is an exploded perspective view illustrating an air supercharger 500 according to a third exemplary embodiment of the present invention.

Referring to FIG. 14, the air supercharger 500 according to the third exemplary embodiment includes an inflow guide 512 that has a reducing internal cross-section in an air advancing direction, an external body 510 that is connected to the inflow guide 512 and that includes a reception part 514 in which a suction hole 516 is formed, a step part 521 that is inserted into the reception part 514 and that is formed at a front end thereof, and an internal body 520 that includes an outflow guide 523 that is communicated with the inflow guide 512.

The external body 510 is formed in a pipe structure having an external shape of a cylinder, and the inflow guide 512 has a reduced internal cross-section as the inside thereof is inwardly protruded when advancing toward the reception part 514. Further, the inflow guide 512 includes a guide surface 512a that has an arc-shaped cross-section and that guides air to the inside, and a support surface 512b that connects the guide surface 512a to the reception part 514 and that is formed perpendicular to the reception part 514.

When the internal body 520 is inserted into the reception part 514, the support surface 512b contacts the front end of the internal body 520, and a plurality of protrusions 515 are formed on the support surface 512b. The protrusions 515 are formed apart by a predetermined interval along an internal circumference of the reception part 514.

Therefore, if the internal body 520 is inserted into the reception part 514, a passage is formed between the internal body 520 and the support surface 512b due to a separation space between the protrusions 515, and exhaust gas is injected into an outflow guide 523 through the passage.

In the present exemplary embodiment, because the protrusions 515 are formed in the support surface 512b of the external body 510, it is unnecessary to provide a separate separation member and thus the manufacturing process can be simplified.

FIG. 15 is a cross-sectional view illustrating an air supercharger according to a fourth exemplary embodiment of the present invention.

Referring to FIG. 15, an air supercharger 600 according to the present exemplary embodiment includes an external body 610 including an inflow guide 612 that has a reducing internal cross-section in an air advancing direction, a reception part 614 that is connected to the inflow guide 612 and in which a suction hole 616 is formed, an internal body 620 that is inserted into the reception part 614 and in which a step part 621 is formed at an external circumferential surface thereof, and a separation member 630 that separates the external body 610 and the internal body 620 from each other.

The internal body 620 is inserted into the external body 610, and a part of the internal body 620 is not inserted into the external body 610 and is exposed to a rear side of the external body 610.

The external body 610 has a convex portion 613 that is protruded to the outside of an external circumferential surface corresponding to the reception part 614. When the air supercharger 600 is inserted into an inflow pipe 640, the convex portion 613 is protruded to the outside of the inflow pipe 640. As the external body 610 and the internal body 620 are coupled, the interior diameter of the air supercharger 600 becomes narrow, and the convex portion 613 performs a function of preventing the interior diameter of the air supercharger 600 from being overly narrow.

That is, because the external body 610 is inserted into the inflow pipe 640, the external body 610 should have a smaller exterior diameter than an interior diameter of the inflow pipe 640 and should have a sufficient thickness to have structural stability. Further, as the inflow guide 612 is formed at the inside of the external body 610, the interior diameter of the external body 610 becomes narrow. In this way, if the interior diameter of the external body 610 becomes overly narrow, there is a problem that the air amount that can be injected into the internal combustion engine is limited.

However, in the present exemplary embodiment, if the convex portion 613 is formed in the external body 610, even if the thickness of the external body 610 is reduced, the convex portion 613 can secure structural stability by supporting the external body 610. Accordingly, the interior diameter of the air supercharger 600 can be prevented from being overly narrow.

A hooking jaw 615 that is protruded to the outside is formed at a side edge of the external body 610, and a hooking jaw 625 that is protruded to the outside in the same way is formed at a side edge of the internal body 620.

In the external body 610, a front end portion into which air is injected is inserted into the inflow pipe 640, in the internal body 620, a rear end portion in which air is discharged is inserted into the inflow pipe 640, the hooking jaw 615 of the external body 610 is formed at the front end portion of the external body 610 in order to support the inflow pipe 640, and the hooking jaw 625 of the internal body 620 is formed at the rear end portion thereof.

The hooking jaws 615 and 625 are formed in a rib form or are formed with a plurality of separated protrusions. The air supercharger 600 is fixed by a fixing member 650 such as a tie band in a state of being inserted into the inflow pipe 640, and the hooking jaws 615 and 625 perform a function of preventing the fixing member 650 from deviating from the outside of the air supercharger 600.

According to the present exemplary embodiment, by forming the hooking jaws 615 and 625 in the external body 610 and the internal body 620, the air supercharger 600 can be more stably fixed to the inflow pipe 640.

FIG. 16 is a cross-sectional view illustrating an air supercharger according to a fifth exemplary embodiment of the present invention. Referring to FIG. 16, an air supercharger 700 according to the present exemplary embodiment includes an inflow guide 712 that has a reducing interior diameter in an air advancing direction; an amplifier 730 including a suction hole 732 that is provided at the rear end of the inflow guide 712 to inject exhaust gas, a distribution passage 734 that is connected to the suction hole 732 to communicate exhaust gas in a circumferential direction, and a guide passage 736 that connects the distribution passage 734 to the inside thereof; and a pipe structure of an outflow guide 723 that is provided at the rear end of the exhaust gas guide passage 736.

The entire air supercharger 700 according to the present exemplary embodiment is formed in one body and is formed in a pipe structure in which a space is formed at the inside thereof.

The inflow guide 712 has a structure that is protruded to the inside of the air supercharger 700, and the outflow guide 723 has a gradually increasing interior diameter in an air flow direction (y-axis direction in FIG. 9) and an interior diameter that is almost equal to that of the inflow guide 712. That is, the interior diameter of the air supercharger 700 gradually decreases from the inflow guide 712 and gradually increases from the outflow guide 723.

The distribution passage 734 is formed in a ring shape along a circumferential direction at the inside of the air supercharger 700, and is connected to a suction hole 732. Therefore, exhaust gas that is injected into the suction hole 732 may flow in a circumferential direction of the air supercharger 700 through the distribution passage 734. The distribution passage 734 is connected to the inside of the air supercharger 700 through the guide passage 736, and the guide passage 736 forms a separated gap in an axial direction between the inflow guide 712 and the outflow guide 723, thereby being formed along an internal surface of the air supercharger 700. A portion in which the guide passage 736 and the outflow guide 723 meet is formed in a convexly curved structure.

Accordingly, exhaust gas that is injected into the suction hole 732 flows in a circumferential direction of the air supercharger 700 along the distribution passage 734 and is injected into the air supercharger 700 through the guide passage 736 in a flowing process. The guide passage 736 is formed along an internal surface of the air supercharger 700, and thus exhaust gas is uniformly supplied into the air supercharger 700.

Gas that is injected by a strong pressure flows to the outflow guide 723 along a curved surface, and gas that is flowed in a strong pressure and a fast speed promotes inflow of air, thereby injecting more air to the internal combustion engine.

FIG. 17 is a schematic diagram illustrating a configuration of an air supercharging system for an internal combustion engine according to a sixth exemplary embodiment of the present invention. Referring to FIG. 17, an air supercharging system 800 includes a turbocharger

850 that is connected to an outlet of an internal combustion engine 810 to promote inflow of air using exhaust gas, and an air supercharger 860 that is connected to the turbocharger 850 to inject air and that receives exhaust gas from a gas supply pipe 861 that is connected to the outlet side of the internal combustion engine 810 to promote air inflow.

The turbocharger 850 rotates a turbine using exhaust gas, and the turbine can be of a common turbocharger that compresses air that is injected into an air inflow pipe 813. The temperature of the air that is compressed by the turbocharger 850 rises, so an intercooler 852 for cooling the compressed air is provided between the turbocharger 850 and the air supercharger 860. A branch member 840 is provided at an outlet side of the internal combustion engine 810, and the branch member 840 is connected to a discharge pipe 851 and the gas supply pipe 861 to send some exhaust gas to the air supercharger 860 through the gas supply pipe 861 and to send the remaining exhaust gas to the turbocharger 850 through the discharge pipe 851.

An air filter 820 is provided at the front of the turbocharger 850 that injects air, and a muffler 830 is provided at the rear side of the turbocharger 850 and through which exhaust gas that passes through the turbocharger 850 is discharged.

Any one air supercharger of the exemplary embodiments can be applied to the air supercharger 860 of the present exemplary embodiment.

Due to such a structure, air that is supplied to the internal combustion engine 810 can be simultaneously supercharged by the turbocharger 850 and the air supercharger 860. Therefore, because the air supercharger 860 can increase a supercharging amount of air, compared with a conventional turbocharger system that supercharges the air using only the turbocharger 850, the output of the internal combustion engine 810 can be improved.

Particularly, when supercharging air using only the turbocharger 850, a turbo lag phenomenon occurs when starting out, and in an air supercharging system 800 according to the present exemplary embodiment, the air supercharger 860 can supercharge the air to the internal combustion engine 810 even when starting out such that the turbo lag phenomenon can be prevented from occurring.

FIG. 18 is a schematic diagram illustrating an air supercharging system for an internal combustion engine according to a seventh exemplary embodiment of the present invention. Referring FIG. 18, an air supercharging system 900 according to the present exemplary embodiment includes an air supercharger 960 that is connected to an air inflow pipe 940 of an internal combustion engine 910, a compressed air guide pipe 970 that supplies compressed air to the air supercharger 910, and an air compressor 950 that is connected to the compressed air guide pipe 970 to compress air.

The air inflow pipe 940 and the compressed air guide pipe 970 are connected to the air supercharger 960, the air inflow pipe 940 receives common mixed air, and compressed air is supplied to the compressed air guide pipe 970. Therefore, the air supercharger 960 can promote inflow of mixed air using compressed air, and as the air supercharger 960 of the present exemplary embodiment, an air supercharger of any one of the above exemplary embodiments can be used.

Air that is supplied to the compressed air guide pipe 970 may be external air or air that is supplied by detouring it from the air inflow pipe 940, and may include some exhaust gas that is supplied by detouring it after being exhausted from the internal combustion engine 910.

The air compressor 950 is provided in the compressed air guide pipe 970, and the air compressor 950 can be of various structures of compressors that generally compress air. The air compressor 950 may be a turbine to be driven with a battery that is provided in a vehicle, and may be a turbine to be driven by shaft power of the internal combustion engine.

According to the present exemplary embodiment, air that is compressed by the air compressor 950 can be stably supplied to the air supercharger 960 and thus the output of the internal combustion engine 910 can be stably improved.

Further, a conventional supercharger system causes a load by compressing all air that is injected to an air inflow pipe, but because the air supercharging system 900 according to the present exemplary embodiment compresses only some air that is injected into the air supercharger 960, a load can be remarkably reduced, compared with the conventional system. Further, because only a small amount of air is compressed, air can be compressed using a battery and so on that are provided in a vehicle.

While this invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

[CLAIMS]

[Claim 1 ]

An air supercharger comprising: a pipe-shaped inflow guide that guides air inflow;

a pipe-shaped outflow guide that is communicated with the inflow guide; and an amplifier that is provided between the inflow guide and the outflow guide,

and that includes a suction hole that is opened to the outside of an external

circumferential surface to inject gas, a distribution passage that is connected to the suction hole and that is formed in a circumferential direction of the outflow guide, and

an induction passage that connects the distribution passage and the inside of the outflow

guide and that draws air from the inflow guide while discharging gas that is injected from the suction hole to the outflow guide.

[Claim 2] The air supercharger of claim 1, further comprising:

an external body that comprises the inflow guide and a pipe-shaped reception part that is connected to the inflow guide; and a pipe-shaped internal body that comprises a step part that is inserted into the reception part and that has a smaller external diameter than an interior diameter of the

reception part in an external circumferential surface thereof, and that thus forms the distribution passage, that forms an axial gap between the pipe-shaped internal body and an external body, and that forms the guide passage.

[Claim 3] The air supercharger of claim 1 or claim 2, wherein the inflow guide has an

interior diameter that gradually decreases along a flow direction of injected air.

[Claim 4] The air supercharger of claim 1 or claim 2, wherein an internal circumference surface of the inflow guide is convexly curved toward the center of a shaft.

[Claim 5]

The air supercharger of claim 2, wherein a plurality of protrusions are formed in an axial gap that is formed between the external body and the internal body to form a

plurality of guide passages.

[Claim 6]

The air supercharger of claim 5, wherein the plurality of guide passages are

disposed apart from each other along an internal circumference of the reception part.

[Claim 7]

The air supercharger of claim 5, wherein the plurality of protrusions are

arranged toward a shaft center of the reception part.

[Claim 8]

The air supercharger of claim 5, wherein the plurality of protrusions are arranged toward a direction that is deviated from a shaft center of the reception part.

[Claim 9]

The air supercharger of claim 5, wherein the protrusion is formed in an external

body.

[Claim 10]

The air supercharger of claim 5, wherein the protrusion is formed in a front end

surface of the internal body.

[Claim 11 ] The air supercharger of claim 5, wherein the protrusion is protruded from an

internal circumference surface of a separate ring-shaped separation member.

[Claim 12]

The air supercharger of claim 11, wherein the thickness of the separation member is in a range of 0.03mm to 0.15mm.

[Claim 13]

The air supercharger of claim 2, further comprising a first surface of the external body and a second surface of the internal body that face each other with the guide passage interposed therebetween within the reception part of the external body, wherein the first surface is formed perpendicular to a center shaft of the reception part, and at least a part of the second surface forms a curved surface that is bent toward the outflow guide.

[Claim 14]

The air supercharger of claim 13, wherein the outflow guide has an interior diameter that gradually increases along a flow direction of air.

[Claim 15]

The air supercharger of claim 2, wherein a hooking jaw is formed at an edge of the external body.

[Claim 16] The air supercharger of claim 2, wherein the external body has a convex part

that is protruded toward the outside of an external circumferential surface corresponding to a reception part.

[Claim 17] The air supercharger of claim 2, wherein the external body and the internal

body are coupled by compression inserting.

[Claim 18]

An air supercharging system for an internal combustion engine that is

connected to an internal combustion engine to amplify air inflow, comprising: an air supply pipe that supplies air to the internal combustion engine;

an air supercharger that is connected to the air supply pipe;

a gas discharge pipe that is connected to the internal combustion engine to

provide a passage for discharging exhaust gas; and a gas supply pipe that is connected to the gas discharge pipe and the air

supercharger to supply exhaust gas to the air supercharger,

wherein the air supercharger comprises

a pipe-shaped inflow guide that guides air inflow,

a pipe-shaped outflow guide that is communicated with the inflow guide, and an amplifier that is provided between the inflow guide and the outflow guide, and that includes a suction hole that is opened to the outside of an external

circumferential surface to inject gas, a distribution passage that is connected to the suction hole and that is formed in a circumferential direction of the outflow guide, and an induction passage that connects the distribution passage and the inside of the outflow guide, and that draws air from the inflow guide while discharging gas that is injected from the suction hole to the outflow guide.

[Claim 19] The air supercharging system of claim 18, wherein the air supercharger comprises: an external body that comprises the inflow guide and a pipe-shaped reception

part that is connected to the inflow guide; and

a pipe-shaped internal body that comprises a step part that is inserted into the reception part and that has a smaller external diameter than an interior diameter of the reception part in an external circumferential surface, and that thus forms the distribution passage, that forms an axial gap between the pipe-shaped internal body and an external body, and that forms the guide passage.

[Claim 20]

The air supercharging system of claim 19, wherein a plurality of protrusions are

formed in an axial gap that is formed between the external body and the internal body to form a plurality of guide passages.

[Claim 21 ]

The air supercharging system of claim 18 or claim 19, wherein the inflow guide

has an interior diameter that gradually decreases along a flow direction of injected air.

[Claim 22]

The air supercharging system of claim 19, further comprising a first surface of the external body and a second surface of the internal body that face each other with the guide passage interposed therebetween within the reception part of the external body, wherein the first surface is formed perpendicular to a center shaft of the

reception part, and at least a part of the second surface forms a curved surface that is bent toward the outflow guide.

[Claim 23]

The air supercharging system of claim 22, wherein the outflow guide has an interior diameter that gradually increases along a flow direction of air.

[Claim 24]

The air supercharging system of claim 18, wherein a check valve is provided in the gas supply pipe.

[Claim 25]

The air supercharging system of claim 18, wherein a muffler is connected to the

gas discharge pipe, and the gas supply pipe is provided between the muffler and the internal combustion

engine.

[Claim 26]

The air supercharging system of claim 18, further comprising a branch member

that is provided in a connection portion of the gas supply pipe and the gas discharge pipe, in which a first through-hole is formed in a gas discharge direction, and in which a second through-hole is formed in a connecting direction of the gas supply pipe at the side of the first through-hole.

[Claim 27]

The air supercharging system of claim 26, wherein an aperture of an outlet side of the first through-hole of the branch member is smaller than that of an inlet side thereof.

[Claim 28]

The air supercharging system of claim 26, wherein the branch member comprises an orifice that is formed at an extension pipe that is extruded from an outlet side of the first through-hole and at an end part of the extension pipe.

[Claim 29]

The air supercharging system of claim 26, wherein a gasket is provided between the gas discharge pipe and the branch member,

a hole that is connected to the first through-hole is formed in the gasket, and a hole of a gasket that is provided adjacently to an outlet of the first through-hole has a smaller diameter than that of the first through-hole.

[Claim 30]

An air supercharging system for an internal combustion engine that is

connected to the internal combustion engine to amplify air inflow, comprising:

a turbocharger that promotes inflow of air by rotating a turbine with exhaust gas that is discharged from the internal combustion engine; and an air supercharger that is connected to a gas supply pipe that is connected to an

outlet side of the internal combustion engine to receive exhaust gas and that is

communicated with the turbocharger to amplify air inflow and to supply the air to the

internal combustion engine, wherein the air supercharger comprises

a pipe-shaped inflow guide that guides air inflow,

a pipe-shaped outflow guide that is communicated with the inflow guide, and an amplifier that is provided between the inflow guide and the outflow guide and that includes a suction hole that is opened to the outside of an external circumferential surface to inject exhaust gas, a distribution passage that is connected to the suction hole and that is formed in a circumferential direction of the outflow guide, and an induction passage that connects the distribution passage and the inside of the outflow guide and that draws air from the inflow guide while discharging exhaust gas

that is injected from the suction hole to the outflow guide.

[Claim 31 ] The air supercharging system of claim 30, wherein the air supercharger

comprises:

an external body that comprises the inflow guide and a pipe-shaped reception

part that is connected to the inflow guide; and a pipe-shaped internal body that comprises a step part that is inserted into the reception part and that has a smaller exterior diameter than an interior diameter of the reception part in an external circumferential surface, and that forms the distribution passage, that forms an axial gap between the pipe-shaped internal body and an external

body, and that forms the guide passage.

[Claim 32]

The air supercharging system of claim 31 , further comprising a first surface of the external body and a second surface of the internal body that face each other with the

guide passage interposed therebetween within the reception part of the external body, wherein the first surface is formed perpendicular to a center shaft of the reception part, and at least a part of the second surface forms a curved surface that is

bent toward the outflow guide.

[Claim 33]

An air supercharging system for an internal combustion engine that is connected to the internal combustion engine to amplify air inflow, comprising: an air supply pipe that supplies air to the internal combustion engine;

an air supercharger that is connected to the air supply pipe;

a compressed air guide pipe that is connected to the air supercharger to supply

compressed air to the air supercharger; and

an air compressor that is provided in the compressed air guide pipe to compress

air that is injected into the internal combustion engine,

wherein the air supercharger comprises

a pipe-shaped inflow guide that guides air inflow,

a pipe-shaped outflow guide that is communicated with the inflow guide, and an amplifier that is provided between the inflow guide and the outflow guide and that includes a suction hole that is opened to the outside of an external circumferential surface to inject compressed air, a distribution passage that is connected to the suction hole and that is formed in a circumferential direction of the outflow guide,

and a guide passage that connects the distribution passage and the inside of the outflow

guide, and that sucks air from the inflow guide while discharging compressed air that is

injected from the suction hole to the outflow guide.

[Claim 34]

The air supercharging system of claim 33, wherein the air supercharger comprises: an external body that comprises the inflow guide and a pipe-shaped reception part that is connected to the inflow guide; and a pipe-shaped internal body that comprises a step part that is inserted into the reception part and that has a smaller external diameter than an interior diameter of the reception part in an external circumferential surface, and that thus forms the distribution passage, that forms an axial gap between the pipe-shaped internal body and an external

body, and that forms the guide passage.

[Claim 35]

The air supercharging system of claim 34, further comprising a first surface of the external body and a second surface of the internal body that face each other with the guide passage interposed therebetween within the reception part of the external body, wherein the first surface is perpendicular to a center shaft of the reception part, and at least a part of the second surface forms a curved surface that is bent toward the outflow guide.

[Claim 36] The air supercharging system of claim 33, wherein the air compressor is connected to a drive shaft of the internal combustion engine for driving.

[Claim 37]

The air supercharging system of claim 33, wherein the air compressor is electrically connected to a battery for driving.