WO2010050703A2 - 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치 - Google Patents
디젤엔진 연료분사펌프의 캐비테이션 손상방지장치 Download PDFInfo
- Publication number
- WO2010050703A2 WO2010050703A2 PCT/KR2009/006146 KR2009006146W WO2010050703A2 WO 2010050703 A2 WO2010050703 A2 WO 2010050703A2 KR 2009006146 W KR2009006146 W KR 2009006146W WO 2010050703 A2 WO2010050703 A2 WO 2010050703A2
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- WIPO (PCT)
- Prior art keywords
- fuel
- barrel port
- valve
- barrel
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
- F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
- F02M59/265—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders characterised by the arrangement or form of spill port of spill contour on the piston
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
- F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/005—Pressure relief valves
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
Definitions
- the present invention relates to a device for preventing cavitation damage of a diesel engine fuel injection pump, and by installing a positive pressure valve on a side of a deflector or a barrel of a fuel injection pump, a fountain or jet generated before and after opening of a barrel port in the final stage of compression of fuel.
- the present invention relates to a cavitation damage preventing device of a diesel engine fuel injection pump, which prevents the occurrence of form cavitation, thereby preventing damage caused by cavitation mainly occurring in the plunger and the barrel port.
- a diesel engine is one of an internal combustion engine that draws air into a cylinder, compresses it to a high temperature / high pressure, and then operates a piston by spontaneously igniting a liquid fuel to operate the piston to obtain power.
- the diesel engine may be classified into a direct injection type, a precombustion chamber type, a swirl chamber type, and an air chamber type according to a fuel inflow method.
- the injection type is a method of directly injecting fuel into a combustion chamber at a high pressure
- a fuel injection device is mainly composed of a fuel injection pump, a fuel valve (injector), and a connection pipe.
- a unit injector unit injector in which a fuel injection pump and an injector are directly coupled, is also used as a fuel injection device.
- the fuel injection pump is a device that compresses fuel to a high pressure and delivers the fuel to an injector, and the fuel injection pressure is gradually increasing in order to improve combustion performance and reduce exhaust gas.
- cavitation erosion damage occurs in the barrel port and plunger of the barrel constituting the fuel injection pump, which causes a serious problem. That is, the cavitation phenomenon occurs even when fuel is injected at a relatively low pressure, but since the cavitation strength is weak, the degree of damage is not serious, and partial damage occurs. By changing, the damage prevention measures could be easily established.
- Korean Patent Laid-Open Publication No. 2001-0020139 installs an orifice member in the switching holes formed in the wall of the barrel so that a significantly increased pressure is formed in the space between the orifice member and the plunger, thereby adjoining the upper edge of the plunger.
- a fuel injection pump for preventing cavitation from occurring in a region is disclosed.
- Japanese Patent Application Laid-Open No. 7-269442 considers damage to the plunger due to the relationship between the classification and the shape of the fuel outflow hole, and forms a small hole for joint destruction adjacent to the fuel outflow hole of the barrel.
- a cavitation prevention mechanism of a fuel injection pump that prevents damage to a plunger is disclosed.
- a fuel injection device of an internal combustion engine is provided, which is provided with a protection member having a fuel entry hole, and configured so that the fuel flowing out of the barrel port at the end of fuel injection hits the inner surface of the fuel entry hole of the protection member at an angle.
- the present invention has been made in view of the above problems, and an object of the present invention is to install a positive pressure valve for blocking the barrel port in the deflector or barrel of the fuel injection pump to increase the pressure of the fuel in the barrel port during the initial compression of the fuel. Ascending to prevent the occurrence of fractional or jet type cavitation occurring before and after opening of the barrel port during the final compression of the fuel, thereby preventing erosion damage caused by cavitation mainly occurring in the plunger and barrel port of the fuel injection pump. To provide a cavitation damage prevention device of a diesel engine fuel injection pump.
- Cavitation damage preventing device of the diesel engine fuel injection pump of the present invention to achieve the object as described above and to perform the problem to eliminate the conventional drawback diesel having a fuel intake valve and a barrel port respectively for the inlet and outlet of the fuel
- a valve member disposed in the barrel port to open and close the barrel port in an engine fuel injection pump to block the barrel port in an initial process of compressing fuel by an upward movement of the plunger to increase an internal pressure
- a valve housing installed on the deflector or barrel of the pump housing to support the valve member;
- a positive pressure valve installed between the valve member and the valve housing and configured to have a spring for elastically supporting the valve member.
- the cavitation is prevented from occurring due to the pressure difference between the barrel port and the pump chamber before and after the barrel port is opened, but when the pressure of the fuel in the barrel port exceeds the opening pressure, the barrel port is opened to allow the fuel to flow out.
- the cavitation damage preventing device of the diesel engine fuel injection pump of the present invention is disposed in the barrel port to open and close the barrel port in the diesel engine fuel injection pump, the valve member having a flow path for communicating the pump chamber and the fuel supply chamber and And installed on the deflector of the pump housing to support the valve member
- the valve housing and the spring is installed between the valve member and the valve housing to elastically support the valve member to block the barrel port during the initial compression of the fuel to increase the pressure of the barrel port to increase the fuel pressure in the barrel port
- a positive pressure valve which opens the barrel port when the opening pressure is exceeded;
- a ball installed in the valve member to open and close the flow path of the valve member, and a spring installed in the valve member to elastically support the ball, wherein the check valve permits the flow of fuel in a direction opposite to the positive pressure valve. Characterized in that configured.
- the cavitation damage prevention device of the diesel engine fuel injection pump of the present invention is disposed in the barrel port to open and close the barrel port in the diesel engine fuel injection pump to block the barrel port in the initial compression process of the fuel by the upward movement of the plunger
- a valve member for increasing pressure a valve housing installed on a deflector or a barrel of a pump housing to support the valve member, and a spring disposed between the valve member and the valve housing to elastically support the valve member; Blocking the barrel port in the initial compression process to increase the pressure of the barrel port and the positive pressure valve for opening the barrel port when the fuel pressure in the barrel port exceeds the opening pressure; It is formed to communicate with the fuel supply chamber and the pump chamber in the adjacent position of the barrel port to the fuel inlet function, characterized in that consisting of the fuel inlet port formed to be opened later than the barrel port in the process of injection of the fuel According to the present invention having the characteristics as described above, by opening the barrel port before and after the end of the compression of the fuel by increasing the pressure of the fuel in the
- 1 is a state diagram showing the jet type cavitation occurring in the initial compression of the fuel of the fuel injection pump
- FIG. 2 is a state diagram showing a waterfall type cavitation occurring at the initial stage of compression of fuel of the fuel injection pump
- 3 is a state diagram showing the fractional cavitation occurring before the barrel port is opened at the end of the compression of the fuel of the fuel injection pump;
- FIG. 4 is a state diagram showing the jet type cavitation occurring after the barrel port is opened at the end of the compression of the fuel of the fuel injection pump;
- FIG. 5 is a cross-sectional view showing the main structure of the fuel injection pump to which the cavitation damage prevention device according to the first embodiment of the present invention is applied;
- FIG. 6 is a cross-sectional view showing a main structure of a fuel injection pump in which a cavitation damage preventing device according to a first embodiment of the present invention is installed in a barrel;
- FIG. 7 is a cross-sectional view showing the main structure of the fuel injection pump to which the cavitation damage prevention device according to the second embodiment of the present invention is applied;
- FIG. 8 is a cross-sectional view showing the main structure of the fuel injection pump to which the cavitation damage prevention device according to the third embodiment of the present invention is applied;
- FIG. 9 is an exploded view showing the plunger in order to clarify the position of the fuel inlet port according to the present invention.
- FIG. 10 is a cross-sectional view showing a required structure of a fuel injection pump in which a cavitation damage prevention self-government according to a third embodiment of the present invention is installed in a barrel;
- valve housing 113 spring
- valve housing 313 spring
- FIG. 1 is a state diagram showing a jet type cavitation occurring before the barrel port is closed in the initial compression process of the fuel injection pump
- Figure 2 is a waterfall type occurring after the barrel port is closed in the initial compression process of the fuel injection pump
- Figure 3 is a state diagram showing the cavitation
- Figure 3 is a state diagram showing the fractional cavitation occurring before the barrel port is opened in the final stage of the compression of the fuel injection pump
- Figure 4 is a barrel port in the final stage of compression of the fuel injection pump A state diagram showing jet type cavitation occurring after opening is shown.
- the jet type cavitation (10) and the waterfall type cavitation (20) generated during the initial compression of the fuel of the fuel injection pump have a relatively low pressure in the fuel injection pump, and thus the strength and amount of cavitation. Because of this small size, this is not a big problem, but the fractional cavitation (30) that occurs before the barrel port is opened during the final compression of the fuel occurs at a high fuel pressure, so that a lot along the wall of the plunger A positive cavity will be generated, which will remain around the surface of the plunger.
- the jet type cavitation 40 generated after the barrel port is opened in the final stage of the compression of the fuel is generated at the moment of the maximum injection pressure, so the strength of the cavitation is high and the flow velocity is very large, thus causing direct damage to the barrel port. Rather, it causes a sudden pressure rise when it hits the barrel port, and this pressure rise collapses the cavities formed around the plunger by the fractional cavitation 30, causing damage to the plunger.
- the present invention clearly identifies the cause of the erosion damage by cavitation as described above, by blocking the barrel port with a constant pressure valve to prevent the damage caused by cavitation by raising the pressure of the fuel in the barrel port in the initial compression process of the fuel It is a feature of the present invention to prevent the occurrence of the fountain type cavitation 30 and the jet type cavitation 40 occurring before and after opening the barrel port in the final compression of the fuel.
- the positive pressure valve installed to block the barrel port like the known positive pressure valve, completely blocks the flow of fuel in one direction, and permits the flow of fuel only when the condition above the open pressure is satisfied in the other direction.
- the positive pressure valve of the present invention completely blocks the inflow of fuel from the fuel supply chamber to the pump chamber, and permits the outflow of fuel from the pump chamber to the fuel supply chamber only when the pressure of the fuel satisfies a condition above the opening pressure of the constant pressure valve. It is composed.
- the first embodiment differs from a fuel injection pump having a separate fuel intake valve in place of the barrel port in which the inlet function of the fuel is lost due to the installation of the constant pressure valve.
- a check valve in the opposite direction is installed to allow fuel to flow through the barrel port
- the third embodiment differs from having a fuel inlet port for fuel inflow at a neighboring position of the barrel port.
- FIG. 5 is a sectional view showing the main structure of a fuel injection pump to which a cavitation damage preventing device according to a first embodiment of the present invention is applied.
- Cavitation damage prevention device is to apply the fuel injection pump is provided with a fuel intake valve 105 for the fuel inlet and a barrel port 104 for the fuel outflow, respectively,
- the fuel injection pump having the fuel intake valve 105 and the barrel port 104, respectively includes a fuel injection pump of a diesel engine mainly used for a large ship, and in FIG. 5, a fuel intake valve ( A configuration with 105 is shown.
- the cavitation damage prevention device is composed of a positive pressure valve 110 consisting of a valve member 111, a valve housing 112 and a spring 113.
- the valve member 111 is a barrel port ( It is disposed in the 104 is moved by the pressure of the fuel in the pump chamber 107 or the elastic force of the spring 113 to open and close the barrel port (104).
- the valve housing 112 supports the valve member 111 and may be installed in the deflector 106 of the pump housing 101. Meanwhile, FIG. 5 discloses a configuration in which the valve housing 112 is formed integrally with the deflector 106 by forming a groove into which the valve member 111 is inserted into the deflector 106.
- valve member 111 moves to open the barrel port 104.
- the valve member 111 is supported by a movable structure so as to be movable.
- the spring 113 is installed between the valve member 111 and the valve housing 112 to elastically support the valve member 111. Since the opening pressure of the positive pressure valve 110 is adjusted by the elastic force of the spring 113, a spring having an appropriate elastic force so that the pressure of the fuel in the barrel port 104 can be formed to the desired design pressure during the initial compression of the fuel. 113 is selected and used.
- the opening pressure of the positive pressure valve 110 controlled by the spring 113 as described above is a pressure condition that can suppress the occurrence of cavitation, and fuel is supplied to the fuel supply chamber through the barrel port 104 at the end of the fuel injection. It is desirable to determine between pressure conditions that do not significantly affect the injection characteristics of the fuel in the course of flow out to 108.
- the valve member 111 is used to maintain pressure balance between the inside and the outside of the valve housing 112. A plurality of balance holes 111-1 are formed.
- the plunger 103 reaches the effective stroke, the high-pressure fuel in the pump chamber 107 is rapidly discharged to the barrel port 104 and jet type cavitation occurs, which causes the barrel port 104 and the deflector ( 106) and the like, but in the present invention, since the pressure of the fuel in the barrel port 104 is increased by the positive pressure valve 110, the barrel port due to cavitation is prevented as the occurrence of jet type cavitation itself is prevented. Erosion damage of the 104 and the deflector 106 can be prevented.
- the above mentioned effective stroke means the barrel by the lower lead groove 103-2 of the plunger 103 at the end of the compression of the fuel from the moment when the barrel port 104 is closed by the upper portion of the plunger 103 at the beginning of compression of the fuel.
- the compression stroke of the fuel up to the moment the port 104 is opened again.
- the positive pressure valve 110 for blocking the barrel port 104 is opened by increasing the pressure of the fuel in the barrel port 104 by the high pressure fuel flowing into the barrel port 104 after the effective stroke of the plunger 103.
- the valve member 111 moves to open the barrel port 104 to discharge the remaining fuel in the pump chamber 107 to the fuel supply chamber 108 to terminate the injection process of the fuel.
- FIG. 6 is a cross-sectional view showing the main structure of the fuel injection pump in which the cavitation damage preventing device according to the first embodiment of the present invention is installed in the barrel.
- the positive pressure valve 110 may be installed in the barrel 102. It is composed of the valve housing 112 and the spring 113 to block the barrel port 104 to increase the pressure of the barrel port 104 to prevent the occurrence of cavitation as described above.
- a flow path 112-1 for allowing fuel to flow out of the fuel supply chamber 108 is further formed in the valve housing 112.
- the cavitation damage prevention device according to the second embodiment of the present invention is a fuel injection pump. If there is no fuel intake valve or fuel needs to be introduced through the barrel port 104 for the purpose of adjusting the fuel injection timing, that is, a fuel injection pump having both the inflow and outflow of fuel through the barrel port is applied.
- the cavitation damage preventing device according to the second embodiment includes a positive pressure valve 210 installed to open and close the barrel port 104, and a built-in positive pressure valve 210 to supply fuel through the barrel port 104. It consists of a check valve 220 to allow inflow.
- the positive pressure valve 210 is arranged to open and close the barrel port 104, the valve member 211 is provided with a flow path (211-1) for communicating the fuel supply chamber 108 and the pump chamber 107, and the valve member
- the valve housing 212 provided in the deflector 106 of the pump housing 101 so that the 211 may be supported, and the spring 213 provided between the said valve member 211 and the valve housing 212 are comprised.
- the check valve 220 opens and closes the flow path in a direction opposite to the positive pressure valve 210. When the pressure of the fuel in the fuel supply chamber 108 reaches the open pressure, the flow path 211-provided in the valve member 211 is provided.
- the check valve 220 is a ball 221 installed in the valve member 211 to open and close the flow path (211-1) provided in the valve member 211, and the valve member 211 to elastically support the ball 221. It is composed of a spring 222 is installed on.
- the pressure of the pump chamber 107 becomes lower than the pressure of the fuel supply chamber 108 while the plunger 103 descends to inhale the fuel.
- the inflow of fuel through the barrel port 104 is achieved.
- the positive pressure valve 210 is the first embodiment described above. By acting the same as the constant pressure valve 110 it is possible to prevent the erosion damage by cavitation.
- FIG. 8 is a sectional view showing the main part structure of a fuel injection pump to which a cavitation damage preventing device according to a third embodiment of the present invention is applied.
- the cavitation damage preventing apparatus in the cavitation damage preventing apparatus according to the third embodiment of the present invention, although the fuel injection pump does not have a fuel intake valve or fuel needs to be introduced through the barrel port for the purpose of adjusting the fuel injection timing, the second embodiment As described above, the fuel injection pump is difficult to secure a space for installing a check valve in the opposite direction to the inside of the constant pressure valve.
- the cavitation damage preventing device according to the third embodiment is formed at a position adjacent to the positive pressure valve 310 installed to open and close the barrel port 104 and the barrel port 104 blocked by the positive pressure valve 310. And a fuel inlet port 320 for supplying fuel from the fuel supply chamber 108 to the pump chamber 107.
- the positive pressure valve 310 includes a valve member 311, a valve housing 312, and a spring 313, and the positive pressure valve 310 is configured in the same manner as in the first embodiment. Detailed description of the operation is omitted.
- the fuel inlet port 320 is formed to communicate with the fuel supply chamber 108 and the pump chamber 107 to function as an inflow of fuel, and is formed to be opened later than the barrel port 104 in the process of injecting fuel. .
- FIG. 9 is an exploded view of the plunger in order to clarify the position of the fuel inlet port according to the present invention.
- Vertical grooves 103-1 and lead grooves 103-2 are formed outside the plunger 103 of the fuel injection pump, and the vertical grooves 103-1 and lead grooves 103-2 are formed of fuel.
- the pump chamber 107 and the barrel port 104 are provided to connect the fuel in the pump chamber 107 to the fuel supply chamber 108.
- the lead groove 103-2 is formed to have an obliquely inclined structure at the outside of the plunger 103, the position of the fuel inlet port 320 in consideration of the structure of the lead groove 103-2 is shown in the drawings.
- the high-pressure fuel flows out through the barrel port 104, which is first opened by the lead groove 103-2 immediately after the effective stroke of the plunger 103. In this case, the generation of cavitation is suppressed by the positive pressure valve 110 blocking the barrel port 104.
- FIG. 10 is a sectional view showing a required structure of a fuel injection pump in which a cavitation damage prevention autonomous value is installed in a barrel according to a third embodiment of the present invention.
- the cavitation damage prevention device of the third embodiment as described above is provided with a positive pressure valve 310 to the barrel 102 when sufficient space for the installation of the positive pressure valve 310 can be secured to the barrel 102 of the fuel injection pump. It may be configured as.
- the positive pressure valve 310 is composed of the valve member 311, the valve housing 312 and the spring 313, as described above to block the barrel port 304 to increase the pressure of the barrel port 104 cavitation In the configuration and action to prevent the occurrence of the same as described above.
- the flow path 312-1 for allowing fuel to flow out to the fuel supply chamber 108 is provided in the valve housing 312. It is further formed in the valve housing 312.
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Abstract
Description
Claims (3)
- 연료의 유입 및 유출을 위한 연료흡입밸브(105)와 배럴포트(104)를 각각 갖는 디젤엔진 연료분사펌프에서 상기 배럴포트(104)를 개폐하도록 배럴포트(104)에 배치되어 플런저(103)의 상향 이동에 의한 연료의 압축 초기과정에서 배럴포트(104)를 차단하여 내부의 압력을 상승시키는 밸브부재(111);상기 밸브부재(111)를 지지하도록 펌프 하우징(101)의 디플렉터(106) 또는 배럴(102)에 설치되는 밸브 하우징(112); 및 상기 밸브부재(111)와 밸브 하우징(112)의 사이에 위치하도록 설치되어 밸브부재(111)를 탄성지지 하는 스프링(113)으로 이루어진 정압밸브(110)로 구성되어 연료의 압축 초기과정에서 배럴포트(104)를 차단하여 배럴포트의 압력을 상승시키고 배럴포트 내 연료 압력이 개방압력을 넘어서면 배럴포트를 개방하는 것을 특징으로 하는 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치.
- 디젤엔진 연료분사펌프에서 배럴포트(104)를 개폐하도록 배럴포트(104)에 배치되되, 펌프실(107)과 연료공급실(108)을 소통하는 유로(211-1)가 구비된 밸브부재(211)와, 상기 밸브부재(211)를 지지하도록 펌프 하우징(101)의 디플렉터(106)에 설치된 밸브 하우징(212)과, 상기 밸브부재(211)와 밸브 하우징(212)의 사이에 위치하도록 설치되어 밸브부재(211)를 탄성지지하는 스프링(213)으로 이루어져 연료의 압축 초기과정에서 배럴포트(104)를 차단하여 배럴포트의 압력을 상승시키고 배럴포트 내 연료 압력이 개방압력을 넘어서면 배럴포트를 개방하는 정압밸브(210);및 상기 밸브부재(211)의 유로(211-1)를 개폐하도록 밸브부재(211)에 설치된 볼(221)과, 상기 볼(221)을 탄성지지하도록 밸브부재(211)의 내부에 설치된 스프링(222)으로 이루어지되, 상기 정압밸브(210)와는 반대방향으로 연료의 흐름을 허용하는 체크밸브(220)로 구성된 것을 특징으로 하는 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치.
- 디젤엔진 연료분사펌프에서 배럴포트(104)를 개폐하도록 배럴포트(104)에 배치되어 플런저(103)의 상향 이동에 의한 연료의 압축 초기과정에서 배럴포트(104)를 차단하여 내부의 압력을 상승시키는 밸브부재(311)와, 상기 밸브부재(311)를 지지하도록 펌프 하우징(101)의 디플렉터(106) 또는 배럴(102)에 설치되는 밸브 하우징(312)과, 상기 밸브부재(311)와 밸브 하우징(312)의 사이에 위치하도록 설치되어 밸브부재(311)를 탄성지지 하는 스프링(313)으로 이루어져 연료의 압축 초기과정에서 배럴포트(104)를 차단하여 배럴포트의 압력을 상승시키고 배럴포트 내 연료 압력이 개방압력을 넘어서면 배럴포트를 개방하는 정압밸브(310);상기 배럴포트(104)의 이웃한 위치에서 연료공급실(108)과 펌프실(107)을 소통하여 연료의 유입기능을 하도록 형성되되, 연료의 분사 종료 과정에서 상기 배럴포트(104)에 비하여 늦게 개방이 이루어지도록 형성된 연료유입포트(320)로 구성된 것을 특징으로 하는 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09823783.7A EP2351929A4 (en) | 2008-10-27 | 2009-10-23 | DEVICE FOR PREVENTING CAVITATION DAMAGE TO THE FUEL INJECTION PUMP OF A DIESEL ENGINE |
| JP2011534381A JP2012506972A (ja) | 2008-10-27 | 2009-10-23 | ディーゼル機関の燃料噴射ポンプにおけるキャビテーション防止装置 |
| CN2009801491366A CN102239327B (zh) | 2008-10-27 | 2009-10-23 | 一种用于柴油机的燃油喷射泵的防气蚀损伤装置 |
| US13/126,041 US9200605B2 (en) | 2008-10-27 | 2009-10-23 | Apparatus for preventing cavitation damage to a diesel engine fuel injection pump |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2008-0105086 | 2008-10-27 | ||
| KR1020080105086A KR100992227B1 (ko) | 2008-10-27 | 2008-10-27 | 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2010050703A2 true WO2010050703A2 (ko) | 2010-05-06 |
| WO2010050703A3 WO2010050703A3 (ko) | 2010-07-01 |
Family
ID=42129430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2009/006146 Ceased WO2010050703A2 (ko) | 2008-10-27 | 2009-10-23 | 디젤엔진 연료분사펌프의 캐비테이션 손상방지장치 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US9200605B2 (ko) |
| EP (1) | EP2351929A4 (ko) |
| JP (2) | JP2012506972A (ko) |
| KR (1) | KR100992227B1 (ko) |
| CN (1) | CN102239327B (ko) |
| WO (1) | WO2010050703A2 (ko) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967670B (zh) * | 2013-02-04 | 2018-11-06 | 辽宁新风企业集团有限公司 | 一种高压油泵用油阀部件 |
| KR20150010877A (ko) * | 2013-07-19 | 2015-01-29 | 현대중공업 주식회사 | 연료분사펌프의 분사장치 |
| DE102015215186B3 (de) * | 2015-08-10 | 2016-12-15 | Continental Automotive Gmbh | Kraftstoffhochdruckpumpe |
| JP6714649B2 (ja) * | 2018-07-17 | 2020-06-24 | 住友理工株式会社 | コネクタ |
| CN111448388B (zh) * | 2018-07-23 | 2022-04-05 | 住友理工株式会社 | 连接器 |
| US11486386B2 (en) | 2019-11-06 | 2022-11-01 | Cummins Inc. | Active control valve for a fluid pump |
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2009
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- 2009-10-23 EP EP09823783.7A patent/EP2351929A4/en not_active Withdrawn
- 2009-10-23 JP JP2011534381A patent/JP2012506972A/ja active Pending
- 2009-10-23 WO PCT/KR2009/006146 patent/WO2010050703A2/ko not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20100046309A (ko) | 2010-05-07 |
| CN102239327B (zh) | 2013-06-05 |
| US9200605B2 (en) | 2015-12-01 |
| JP2012506972A (ja) | 2012-03-22 |
| US20110259302A1 (en) | 2011-10-27 |
| JP5627729B2 (ja) | 2014-11-19 |
| KR100992227B1 (ko) | 2010-11-05 |
| WO2010050703A3 (ko) | 2010-07-01 |
| EP2351929A4 (en) | 2013-12-18 |
| JP2013108510A (ja) | 2013-06-06 |
| EP2351929A2 (en) | 2011-08-03 |
| CN102239327A (zh) | 2011-11-09 |
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