WO2012020934A1 - Pulsation dampener with disk spring - Google Patents

Pulsation dampener with disk spring Download PDF

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Publication number
WO2012020934A1
WO2012020934A1 PCT/KR2011/005473 KR2011005473W WO2012020934A1 WO 2012020934 A1 WO2012020934 A1 WO 2012020934A1 KR 2011005473 W KR2011005473 W KR 2011005473W WO 2012020934 A1 WO2012020934 A1 WO 2012020934A1
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WO
WIPO (PCT)
Prior art keywords
fuel
pulsation
pipe
pulsation dampener
piston
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Application number
PCT/KR2011/005473
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French (fr)
Inventor
Byoung-Chan Hwang
Original Assignee
Byoung-Chan Hwang
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Filing date
Publication date
Application filed by Byoung-Chan Hwang filed Critical Byoung-Chan Hwang
Publication of WO2012020934A1 publication Critical patent/WO2012020934A1/en

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    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets

Definitions

  • the present invention relates to a pulsation dampener applied to a fuel supply line for a gasoline direct injection engine, and more particularly, to a pulsation dampener with a disk spring which dissipates a pulsation wave generated in a fuel supplying plunger pump by allowing a linearly reciprocal piston to convert the pulsation wave in fuel into compression energy and store and emit the compression energy using a disk spring in a fuel supply line of a fuel rail of a gasoline direct injection engine, thereby maintaining a pressure state with no pulsation wave in the fuel and reducing energy loss.
  • a fuel pump supplies fuel stored in a fuel tank into an injector at a high pressure, and the injector injects the fuel fed at a high pressure into a cylinder.
  • Gasoline engines for vehicles are classified into two types of engines according to fuel injection methods: a multi-point injection (MPI) engine and a gasoline direct injection (GDI) engine.
  • MPI multi-point injection
  • GDI gasoline direct injection
  • a GDI engine is an efficient engine which, after converting fuel into fine particles of a high pressure and directly injecting them into an engine cylinder, ignites and explodes the fine particles with an ignition plug to completely burn the fuel. Accordingly, such a GDI engine exhausts the completely burned engine gas into the air, and thus prevents air pollution efficiently.
  • Such a GDI engine includes a high pressure generator, i.e. a plunger pump (a separate part), a fuel injector (a separate part), a connecting tube (a separate part), and a fuel rail (a separate part).
  • a high pressure generator i.e. a plunger pump (a separate part), a fuel injector (a separate part), a connecting tube (a separate part), and a fuel rail (a separate part).
  • a plunger pump In a GDI engine, a plunger pump generates a high pressure and a pulsation wave with a large magnitude at the same time.
  • a pulsation dampener operating at a high pressure (higher than 200 bars) is required to dampen such a pulsation wave.
  • an orifice formed in a fuel rail dampens a pulsation wave of a high pressure.
  • the conventional pulsation dampener using an orifice generates flow rate and pressure resistances to dampen a pulsation wave by rapidly reducing a cross-section of a fuel tube.
  • the orifice method has a structure causing much energy loss since it uses flow rate and pressure resistances.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a pulsation dampener with a disk spring which converts a pulsation wave in fuel into compression energy and store and emit the compression energy to dissipate the pulsation wave generated in a fuel supplying plunger pump, making it possible to maintain a pressure state with no pulsation wave in the fuel, sealing parts, minimizing separation of parts, and reducing energy loss.
  • a pulsation dampener installed between a fuel injector and a plunger mol pump for supplying engine fuel of a gasoline direct injection engine and adapted to reduce a pulsation of a fluid
  • the pulsation dampener including: a spring housing within which a piston is reciprocally installed such that a disk spring is interposed between the spring body and the piston; a body threaded to the spring housing and supported by an inner O-ring stopper, an O-ring spacer being installed between a pair of inner sealing O-rings at an outer surface of the piston; and a ball-end joint inserted into one side of the body, installed within a joint nut threaded to a joint bolt bonded to a fuel rail pipe, and having a connecting passage formed therein.
  • a pulsation wave introduced into a fuel rail pipe can be offset and a fluid can be dispersed in proportion to the magnitude of the pulsation wave to minimize a pulsation of the discharged fluid, it is possible to uniformize an operation of a unit operated through supply of the fluid, reduce noise due to the pulsation, enhance operation efficiency, reduce energy loss, and save energy.
  • FIG. 1 is a longitudinal sectional view of a pulsation dampener according to an embodiment of the present invention
  • FIG. 2 is a longitudinal sectional view of a pipe connecting block according to another embodiment of the present invention.
  • FIG. 3 is a longitudinal sectional view of a body according to still another embodiment of the present invention.
  • FIG. 4 is a longitudinal sectional view of a body according to yet another embodiment of the present invention.
  • FIG. 5 is a longitudinal sectional view of a body according to yet another embodiment of the present invention.
  • FIG. 6 is a longitudinal sectional view of a pulsation dampener according to yet another embodiment of the present invention.
  • FIG. 1 illustrates a longitudinal sectional view of a pulsation dampener according to an embodiment of the present invention.
  • a pulsation dampener 10 of the present invention includes a spring housing 20 within which a linearly reciprocal piston 24 is installed, a body 30 threaded to the spring housing 20, and a ball-end joint 50 inserted into one side of the body 30 and accommodated within a joint nut 40 threaded to a joint bolt 60.
  • a disk spring 22 is interposed between the spring housing 20 and the linearly reciprocal piston 24, and a tip end of the piston 24 is inserted into a guide 21 for slide guide.
  • the body 30 configured to support an inner O-ring stopper 36 is threaded to the spring housing 20 at a stepped portion thereof on the inner side thereof.
  • the body 30 accommodates a pulsating head space 28 of the piston 24 and inner sealing O-rings 34a and 34b are disposed at an outer periphery of the piston 24 on opposite sides of an inner O-ring spacer 32.
  • a rubber pad spring 26 is installed at a tip end of the piston 24 to serve as a secondary cushion spring.
  • An outer O-ring 38 is installed on an outer periphery of one side of the spring housing 20 where the spring housing 20 is bonded to the body 30, and the ball-end joint 50 is inserted into an outer protrusion of the body 30.
  • a fuel passage 52 is formed in the interior of the ball-end joint 50, and the ball-end joint 50 is supported by and coupled to the joint nut 40.
  • a ball-end portion of the ball-end joint 50 contacts the joint bolt 60 such that a connecting passage 62 formed in the joint bolt 60 and the connecting passage 52 of the ball-end joint 50 are aligned on the same line.
  • the joint bolt 60 is bonded to a fuel rail pipe 12 having a pipe chamber 14 on one side thereof, and is threaded to the joint nut 40.
  • FIG. 2 is a sectional view of a main part according to another embodiment of the present invention. As illustrated in FIG. 2, the pipe connecting block 600 is threaded to the joint nut 40.
  • a fuel inlet pipe 125 is installed on a side surface of the pipe connecting block 600 and an orifice member 124 is inserted into the fuel inlet pipe 125.
  • a pair of fuel outlet pipes 121 and 129 are vertically installed such that after a pulsation wave in fuel introduced into a fuel inlet 126 is dissipated by the pulsation dampener 10, the fuel is discharged through two fuel outlets 120 and 128.
  • FIG. 3 is a sectional view of a main part according to still another embodiment of the present invention.
  • a body 300 whose lower portion is connected to a fuel inlet pipe 133 and whose upper portion is connected to a fuel outlet pipe 131 with the fuel inlet pipe 133 and the fuel outlet pipe 131 being vertically installed is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced through a fuel inlet 134, which is discharged through a fuel outlet 130.
  • FIG. 4 is a sectional view of a main part according to yet another embodiment of the present invention.
  • a body 302 whose lower portion is connected to a fuel rail pipe 12 is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced into a fuel passage 119 through a pipe 14 of the fuel rail pipe 12.
  • FIG. 5 is a sectional view of a main part according to yet another embodiment of the present invention.
  • a body 304 connected to a fuel pipe 137 is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced into a fuel passage 139 through a pipe 138 of the fuel rail pipe 137.
  • FIG. 6 is a longitudinal sectional view illustrating a pulsation dampener according to yet another embodiment of the present invention.
  • a ball-end joint pipe 150 is inserted into one side of a body 30, and a free end of the ball-end joint pipe 150 which is curved and extends long is installed in a joint nut 40 threaded to a joint bolt 60 to which a fuel rail pipe 12 is bonded.
  • a connecting passage 52 is formed in the ball-end joint pipe 150.
  • a disk spring 22 is installed in a spring housing 20 and the spring housing 20 is threaded to the body 30, and a piston 24 which can reciprocate together with the disk spring 22 is inserted into the spring housing 20.
  • a pulsation wave of a high pressure generated when an engine fuel supplying plunger pump for a gasoline direction injection engine is in a compression process is transferred to a pulsation space 28 through a fuel passage 62 and a connecting passage 52 via a pipe 14 of the fuel rail pipe 12.
  • the pulsation wave transferred to the pulsation space 28 operates the piston 24 and is transferred to the disk spring 22, and the disk spring 22 is contracted so that compression energy is stored in the disk spring 22.
  • the compression energy stored in the disk spring 22 transfers a high pressure to the fuel again when the disk spring 22 is expanded during a suction process of the engine fuel supplying plunger pump.
  • the disk spring 22 repeatedly converts the pulsation wave in the fuel into compression energy to store and emit the compression energy, it dissipates the pulsation energy generated in the fuel supplying plunger pump so that there is no pulsation wave in the fuel, making it possible to realize a pulsation dampener without energy loss.
  • inner sealing O-rings 34a and 34b are inserted into the body 30 to seal the body 30 and an O-ring spacer 32 is installed to maintain the interval of the O-rings 34a and 34b, and an inner O-ring stopper 36 is installed to prevent separation of the inner sealing O-rings 34a and 34b.
  • a secondary cushion rubber pad spring 26 is installed to prevent an overload applied to the disk spring 22, and an outer O-ring 38 is installed to prevent secondary leakage of fuel.
  • a ball joint 50 is installed in the joint nut 40, the body 30 is threaded to the joint bolt 60, and the joint bolt 60 is attached to the fuel rail pipe 12, so that the pulsation dampener 10 can be attached to the fuel rail pipe 12 stably and excellently.
  • the pulsation dampener 10 without energy loss can be obtained through the present invention.
  • the pipe connecting block 600 is threaded to the joint nut 40 of the pulsation dampener 10
  • the fuel inlet pipe 125 is installed on a side surface of the pipe connecting block 600
  • the orifice 124 is inserted into the fuel inlet pipe 125
  • the pair of fuel outlet pipes 121 and 129 standing vertically are installed, so that a pulsation wave in the fuel introduced into the fuel inlet 126 of the fuel inlet pipe 125 can be dissipated by the pulsation dampener 10 and the fuel can be discharged through two fuel outlets 120 and 128, making it possible to save energy by dampening the pulsation wave.
  • the body 300 is connected to the pulsation dampener 10, the fuel inlet pipe 133 is installed at a lower portion of the body 300, and the fuel outlet pipe 131 is vertically installed at an upper portion of the body 300, so that a pulsation wave in the fuel introduced into the fuel inlet 134 provided in the fuel inlet pipe 133 can be dissipated by the pulsation dampener 10 and the fuel can be discharged through the fuel outlet 130 provided in the fuel outlet pipe 131, making it possible to save energy by dampening the pulsation wave.
  • the body 302 is connected to the pulsation dampener 10, so that a pulsation wave in the fuel introduced into the fuel passage 119 through the rail pipe chamber 14 of the fuel rail pipe 12 can be dissipated by the pulsation dampener 10, making it possible to save energy by dampening the pulsation wave.
  • the body 304 is connected to the pulsation dampener 10, so that a pulsation wave in the fuel introduced into the fuel passage 139 through the rail pipe chamber 138 of the fuel rail pipe 137 can be dissipated by the pulsation dampener 10, making it possible to save energy by dampening the pulsation wave.
  • the ball-end joint pipe 150 is inserted into the body 30 and is installed within the joint nut 40, so that excellent joint can be realized stably even in an environment having a separation distance, making it possible to save energy by dampening the pulsation wave.
  • a pulsation wave in fuel introduced into a fuel passage can be dissipated by a pulsation dampener, making it possible to save energy by dampening the pulsation wave.
  • the pulsation wave can be offset in proportion to the magnitude of the pulsation wave introduced into a fuel rail pipe and the pulsation of a discharged fluid can be minimized by dispersing the fluid, the operation of a unit operated through supply of a fluid can be uniformized and noise due to the pulsation wave can be reduced, making it possible to increase operation efficiency, reduce energy loss, and save fuel consumption.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Disclosed is a pulsation dampener ( 101 with a disk spring (22) which dissipates a pulsation wave generated in a fuel supplying plunger pump by allowing a linearly reciprocal piston (24) to convert the pulsation wave in fuel into compression energy and store and emit the compression energy using a disk spring (22) in a fuel supply line of a fuel rail of a gasoline direct injection engine, thereby maintaining a pressure state with no pulsation wave in fuel and reducing energy loss. The pulsation dampener includes: a spring housing (20) within which a piston (24) is reciprocally installed such that a disk spring (22) is interposed between the spring housing (20) and the piston (24): a body threaded to the spring housing (25) and supported by an inner (')-ring (36), an O-ring spacer (32) being installed between a pair of inner scaling O-rings (34a.34 b) at an outer surface of the piston (24); and a ball-end joining (50) inserted into one side of the body, installed within a joint nut threaded to a joint bolt (60) bonded to a fuel rail pipe ( 14). and having a connecting passage formed therein.

Description

PULSATION DAMPENER WITH DISK SPRING
The present invention relates to a pulsation dampener applied to a fuel supply line for a gasoline direct injection engine, and more particularly, to a pulsation dampener with a disk spring which dissipates a pulsation wave generated in a fuel supplying plunger pump by allowing a linearly reciprocal piston to convert the pulsation wave in fuel into compression energy and store and emit the compression energy using a disk spring in a fuel supply line of a fuel rail of a gasoline direct injection engine, thereby maintaining a pressure state with no pulsation wave in the fuel and reducing energy loss.
Generally, in an engine for a vehicle, a fuel pump supplies fuel stored in a fuel tank into an injector at a high pressure, and the injector injects the fuel fed at a high pressure into a cylinder.
Gasoline engines for vehicles are classified into two types of engines according to fuel injection methods: a multi-point injection (MPI) engine and a gasoline direct injection (GDI) engine.
Here, a GDI engine is an efficient engine which, after converting fuel into fine particles of a high pressure and directly injecting them into an engine cylinder, ignites and explodes the fine particles with an ignition plug to completely burn the fuel. Accordingly, such a GDI engine exhausts the completely burned engine gas into the air, and thus prevents air pollution efficiently.
Recently, GDI engines operating at a high pressure (higher than 200 bars) have been developed.
Such a GDI engine includes a high pressure generator, i.e. a plunger pump (a separate part), a fuel injector (a separate part), a connecting tube (a separate part), and a fuel rail (a separate part).
In a GDI engine, a plunger pump generates a high pressure and a pulsation wave with a large magnitude at the same time.
If the pulsation wave with a large magnitude is directly transferred to an injector, an amount of injected fuel is changed momentarily, reducing efficiency of an engine, generating vibrations of the engine, and causing noise of the engine.
A pulsation dampener operating at a high pressure (higher than 200 bars) is required to dampen such a pulsation wave.
Conventionally, an orifice formed in a fuel rail dampens a pulsation wave of a high pressure. However, the conventional pulsation dampener using an orifice generates flow rate and pressure resistances to dampen a pulsation wave by rapidly reducing a cross-section of a fuel tube. Thus, the orifice method has a structure causing much energy loss since it uses flow rate and pressure resistances.
Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a pulsation dampener with a disk spring which converts a pulsation wave in fuel into compression energy and store and emit the compression energy to dissipate the pulsation wave generated in a fuel supplying plunger pump, making it possible to maintain a pressure state with no pulsation wave in the fuel, sealing parts, minimizing separation of parts, and reducing energy loss.
In accordance with an aspect of the present invention, the above and other aspects can be accomplished by providing a pulsation dampener installed between a fuel injector and a plunger feul pump for supplying engine fuel of a gasoline direct injection engine and adapted to reduce a pulsation of a fluid, the pulsation dampener including: a spring housing within which a piston is reciprocally installed such that a disk spring is interposed between the spring body and the piston; a body threaded to the spring housing and supported by an inner O-ring stopper, an O-ring spacer being installed between a pair of inner sealing O-rings at an outer surface of the piston; and a ball-end joint inserted into one side of the body, installed within a joint nut threaded to a joint bolt bonded to a fuel rail pipe, and having a connecting passage formed therein.
According to the present invention, since a pulsation wave introduced into a fuel rail pipe can be offset and a fluid can be dispersed in proportion to the magnitude of the pulsation wave to minimize a pulsation of the discharged fluid, it is possible to uniformize an operation of a unit operated through supply of the fluid, reduce noise due to the pulsation, enhance operation efficiency, reduce energy loss, and save energy.
FIG. 1 is a longitudinal sectional view of a pulsation dampener according to an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view of a pipe connecting block according to another embodiment of the present invention;
FIG. 3 is a longitudinal sectional view of a body according to still another embodiment of the present invention;
FIG. 4 is a longitudinal sectional view of a body according to yet another embodiment of the present invention;
FIG. 5 is a longitudinal sectional view of a body according to yet another embodiment of the present invention; and
FIG. 6 is a longitudinal sectional view of a pulsation dampener according to yet another embodiment of the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 illustrates a longitudinal sectional view of a pulsation dampener according to an embodiment of the present invention.
As illustrated in FIG. 1, a pulsation dampener 10 of the present invention includes a spring housing 20 within which a linearly reciprocal piston 24 is installed, a body 30 threaded to the spring housing 20, and a ball-end joint 50 inserted into one side of the body 30 and accommodated within a joint nut 40 threaded to a joint bolt 60.
A disk spring 22 is interposed between the spring housing 20 and the linearly reciprocal piston 24, and a tip end of the piston 24 is inserted into a guide 21 for slide guide. The body 30 configured to support an inner O-ring stopper 36 is threaded to the spring housing 20 at a stepped portion thereof on the inner side thereof.
The body 30 accommodates a pulsating head space 28 of the piston 24 and inner sealing O- rings 34a and 34b are disposed at an outer periphery of the piston 24 on opposite sides of an inner O-ring spacer 32.
Here, a rubber pad spring 26 is installed at a tip end of the piston 24 to serve as a secondary cushion spring.
An outer O-ring 38 is installed on an outer periphery of one side of the spring housing 20 where the spring housing 20 is bonded to the body 30, and the ball-end joint 50 is inserted into an outer protrusion of the body 30.
A fuel passage 52 is formed in the interior of the ball-end joint 50, and the ball-end joint 50 is supported by and coupled to the joint nut 40. A ball-end portion of the ball-end joint 50 contacts the joint bolt 60 such that a connecting passage 62 formed in the joint bolt 60 and the connecting passage 52 of the ball-end joint 50 are aligned on the same line.
The joint bolt 60 is bonded to a fuel rail pipe 12 having a pipe chamber 14 on one side thereof, and is threaded to the joint nut 40.
FIG. 2 is a sectional view of a main part according to another embodiment of the present invention. As illustrated in FIG. 2, the pipe connecting block 600 is threaded to the joint nut 40.
A fuel inlet pipe 125 is installed on a side surface of the pipe connecting block 600 and an orifice member 124 is inserted into the fuel inlet pipe 125. A pair of fuel outlet pipes 121 and 129 are vertically installed such that after a pulsation wave in fuel introduced into a fuel inlet 126 is dissipated by the pulsation dampener 10, the fuel is discharged through two fuel outlets 120 and 128.
FIG. 3 is a sectional view of a main part according to still another embodiment of the present invention. As illustrated in FIG. 3, a body 300 whose lower portion is connected to a fuel inlet pipe 133 and whose upper portion is connected to a fuel outlet pipe 131 with the fuel inlet pipe 133 and the fuel outlet pipe 131 being vertically installed is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced through a fuel inlet 134, which is discharged through a fuel outlet 130.
FIG. 4 is a sectional view of a main part according to yet another embodiment of the present invention. As illustrated in FIG. 4, a body 302 whose lower portion is connected to a fuel rail pipe 12 is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced into a fuel passage 119 through a pipe 14 of the fuel rail pipe 12.
FIG. 5 is a sectional view of a main part according to yet another embodiment of the present invention. As illustrated in FIG. 5, a body 304 connected to a fuel pipe 137 is connected to the pulsation dampener 10 such that the pulsation dampener 10 dissipates a pulsation wave in fuel introduced into a fuel passage 139 through a pipe 138 of the fuel rail pipe 137.
FIG. 6 is a longitudinal sectional view illustrating a pulsation dampener according to yet another embodiment of the present invention. As illustrated in FIG. 6, a ball-end joint pipe 150 is inserted into one side of a body 30, and a free end of the ball-end joint pipe 150 which is curved and extends long is installed in a joint nut 40 threaded to a joint bolt 60 to which a fuel rail pipe 12 is bonded. A connecting passage 52 is formed in the ball-end joint pipe 150. Thus, even when the body 30 and the fuel rail pipe 12 are spaced apart from each other, they may be connected by means of the ball-end joint pipe and may be constructed independently or complexly in a long linear form or a curved form.
In the above-described pulsation dampener 10, a disk spring 22 is installed in a spring housing 20 and the spring housing 20 is threaded to the body 30, and a piston 24 which can reciprocate together with the disk spring 22 is inserted into the spring housing 20.
Thus, a pulsation wave of a high pressure generated when an engine fuel supplying plunger pump for a gasoline direction injection engine is in a compression process is transferred to a pulsation space 28 through a fuel passage 62 and a connecting passage 52 via a pipe 14 of the fuel rail pipe 12.
The pulsation wave transferred to the pulsation space 28 operates the piston 24 and is transferred to the disk spring 22, and the disk spring 22 is contracted so that compression energy is stored in the disk spring 22.
The compression energy stored in the disk spring 22 transfers a high pressure to the fuel again when the disk spring 22 is expanded during a suction process of the engine fuel supplying plunger pump.
In this way, as the disk spring 22 repeatedly converts the pulsation wave in the fuel into compression energy to store and emit the compression energy, it dissipates the pulsation energy generated in the fuel supplying plunger pump so that there is no pulsation wave in the fuel, making it possible to realize a pulsation dampener without energy loss.
According to the present invention, inner sealing O- rings 34a and 34b are inserted into the body 30 to seal the body 30 and an O-ring spacer 32 is installed to maintain the interval of the O- rings 34a and 34b, and an inner O-ring stopper 36 is installed to prevent separation of the inner sealing O- rings 34a and 34b.
A secondary cushion rubber pad spring 26 is installed to prevent an overload applied to the disk spring 22, and an outer O-ring 38 is installed to prevent secondary leakage of fuel.
A ball joint 50 is installed in the joint nut 40, the body 30 is threaded to the joint bolt 60, and the joint bolt 60 is attached to the fuel rail pipe 12, so that the pulsation dampener 10 can be attached to the fuel rail pipe 12 stably and excellently.
Thus, the pulsation dampener 10 without energy loss can be obtained through the present invention.
As in FIG. 2 illustrating another embodiment of the present invention, the pipe connecting block 600 is threaded to the joint nut 40 of the pulsation dampener 10, the fuel inlet pipe 125 is installed on a side surface of the pipe connecting block 600, the orifice 124 is inserted into the fuel inlet pipe 125, and the pair of fuel outlet pipes 121 and 129 standing vertically are installed, so that a pulsation wave in the fuel introduced into the fuel inlet 126 of the fuel inlet pipe 125 can be dissipated by the pulsation dampener 10 and the fuel can be discharged through two fuel outlets 120 and 128, making it possible to save energy by dampening the pulsation wave.
As in FIG. 3 illustrating still another embodiment of the present invention, the body 300 is connected to the pulsation dampener 10, the fuel inlet pipe 133 is installed at a lower portion of the body 300, and the fuel outlet pipe 131 is vertically installed at an upper portion of the body 300, so that a pulsation wave in the fuel introduced into the fuel inlet 134 provided in the fuel inlet pipe 133 can be dissipated by the pulsation dampener 10 and the fuel can be discharged through the fuel outlet 130 provided in the fuel outlet pipe 131, making it possible to save energy by dampening the pulsation wave.
As in FIG. 4 illustrating yet another embodiment of the present invention, the body 302 is connected to the pulsation dampener 10, so that a pulsation wave in the fuel introduced into the fuel passage 119 through the rail pipe chamber 14 of the fuel rail pipe 12 can be dissipated by the pulsation dampener 10, making it possible to save energy by dampening the pulsation wave.
As in FIG. 5 illustrating yet another embodiment of the present invention, the body 304 is connected to the pulsation dampener 10, so that a pulsation wave in the fuel introduced into the fuel passage 139 through the rail pipe chamber 138 of the fuel rail pipe 137 can be dissipated by the pulsation dampener 10, making it possible to save energy by dampening the pulsation wave.
As in FIG. 6 illustrating yet another embodiment of the present invention, the ball-end joint pipe 150 is inserted into the body 30 and is installed within the joint nut 40, so that excellent joint can be realized stably even in an environment having a separation distance, making it possible to save energy by dampening the pulsation wave.
While the present invention has been shown and described in connection with the exemplary embodiments, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the spirit and scope of the invention as defined by the appended claims.
A pulsation wave in fuel introduced into a fuel passage can be dissipated by a pulsation dampener, making it possible to save energy by dampening the pulsation wave. Thus, since the pulsation wave can be offset in proportion to the magnitude of the pulsation wave introduced into a fuel rail pipe and the pulsation of a discharged fluid can be minimized by dispersing the fluid, the operation of a unit operated through supply of a fluid can be uniformized and noise due to the pulsation wave can be reduced, making it possible to increase operation efficiency, reduce energy loss, and save fuel consumption.

Claims (6)

  1. A pulsation dampener (10) installed in a fuel rail pipe (12) connected to a plunger pump for supplying engine fuel of a gasoline direct injection engine and adapted to reduce a pulsation of a fluid, the pulsation dampener comprising:
    a spring housing (20) within which a piston (24) is reciprocally installed such that a disk spring (22) is interposed between the spring housing (20) and the piston (24);
    a body (30) threaded to the spring housing (20) and supported by an inner O-ring stopper (36), an O-ring spacer (32) being installed between a pair of inner sealing O-rings (34a, 34b) at an outer surface of the piston (24); and
    a ball-end joint (50) inserted into one side of the body (30), installed within a joint nut (40) threaded to a joint bolt (60) bonded to the fuel rail pipe (12), and having a connecting passage (52) formed therein.
  2. The pulsation dampener as claimed in claim 1, wherein a pipe connecting block (600) is threaded to the joint nut (40), an orifice member 124 is inserted into a fuel inlet pipe (125) installed on a side surface of the pipe connecting block (600), and a pair of fuel outlet pipes (121, 129) are installed vertically, so that a pulsation wave in fuel introduced into a fuel inlet (126) is dissipated by the pulsation dampener (10) and the fuel can be discharged through two fuel outlets (120, 128).
  3. The pulsation dampener as claimed in claim 1, wherein the spring housing (20) is threaded to a body (300), a fuel inlet pipe (133) installed at a lower portion of the body (300) and a fuel outlet pipe (131) installed at an upper portion of the body (300) are vertically connected to the pulsation dampener (10), so that a pulsation wave in fuel introduced into a fuel inlet (134) is dissipated by the pulsation dampener (10) and the fuel is discharged through a fuel outlet (130).
  4. The pulsation dampener as claimed in claim 1, wherein the spring housing (20) is threaded to a body (302), and the body (302) is connected to the pulsation dampener (10) with a fuel rail pipe (12) being connected to the body (302), so that a pulsation wave in fuel introduced into a fuel passage (119) through a pipe (14) of the fuel rail pipe (12) is dissipated by the pulsation dampener (10).
  5. The pulsation dampener as claimed in claim 1, wherein the spring housing (20) is threaded to a body (304), and the body (304) is connected to the pulsation dampener (10) while being connected to a fuel rail pipe (137), so that a pulsation wave in fuel introduced into a fuel passage (139) through a pipe (138) of the fuel rail pipe (137) is dissipated by the pulsation dampener (10).
  6. A pulsation dampener (10) installed in a fuel rail pipe (12) connected to a plunger pump for supplying engine fuel of a gasoline direct injection engine and adapted to reduce a pulsation of a fluid, the pulsation dampener comprising:
    a spring housing (20) within which a piston (24) is reciprocally installed such that a disk spring (22) is interposed between the spring housing (20) and the piston (24);
    a body (30) threaded to the spring housing (20) and supported by an inner O-ring stopper (36), an O-ring spacer (32) being installed between a pair of inner sealing O-rings (34a, 34b) at an outer surface of the piston (24); and
    a ball-end joint pipe (150) inserted into one side of the body (30) to be curved and extend long, whose free end is installed in a joint nut (40) threaded to a joint bolt (60) to which the fuel rail pipe (12) is bonded, and including a connecting passage (52) formed therein.
PCT/KR2011/005473 2010-08-11 2011-07-25 Pulsation dampener with disk spring WO2012020934A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100077539A KR101168591B1 (en) 2010-08-11 2010-08-11 Pulsation Dampener with Disk Spring
KR10-2010-0077539 2010-08-11

Publications (1)

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WO2012020934A1 true WO2012020934A1 (en) 2012-02-16

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KR101424994B1 (en) * 2012-04-27 2014-07-31 황병찬 Pulsation Reducer by Combination Spring
KR101873373B1 (en) 2015-09-14 2018-07-03 황현식 Pulse Reducer by Double Multilayer Diaphragm Spring
KR102157272B1 (en) 2019-04-19 2020-09-17 황현식 Pulse Reduce Damper by Single Disc Spring

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JP2003003926A (en) * 2001-06-25 2003-01-08 Piolax Inc Fuel delivery pipe with pulsation damper
JP2003028025A (en) * 2001-07-18 2003-01-29 Toyota Motor Corp Fuel supply device for internal combustion engine

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JP3492503B2 (en) 1997-11-11 2004-02-03 日野自動車株式会社 Pipe fittings
JP2001082288A (en) 1999-09-13 2001-03-27 Otics Corp Relief valve for common rail

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JP2003003926A (en) * 2001-06-25 2003-01-08 Piolax Inc Fuel delivery pipe with pulsation damper
JP2003028025A (en) * 2001-07-18 2003-01-29 Toyota Motor Corp Fuel supply device for internal combustion engine

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