WO2012091367A2 - 전자제어 연료분사밸브 - Google Patents
전자제어 연료분사밸브 Download PDFInfo
- Publication number
- WO2012091367A2 WO2012091367A2 PCT/KR2011/010037 KR2011010037W WO2012091367A2 WO 2012091367 A2 WO2012091367 A2 WO 2012091367A2 KR 2011010037 W KR2011010037 W KR 2011010037W WO 2012091367 A2 WO2012091367 A2 WO 2012091367A2
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- WO
- WIPO (PCT)
- Prior art keywords
- fuel
- needle
- control
- pressure chamber
- valve body
- Prior art date
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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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
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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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
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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
- F02M63/001—Fuel-injection apparatus having injection valves held closed mechanically, e.g. by springs, and opened by a cyclically-operated mechanism for a time
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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
- F02M2200/50—Arrangements of springs for valves used in fuel injectors or fuel injection pumps
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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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
- F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
Definitions
- the present invention relates to an electronically controlled fuel injection valve, and more particularly, to an electronically controlled fuel injection valve capable of controlling fuel injection timing and injection amount according to a control signal independently of an engine operating condition.
- the common rail type fuel injection method that is capable of high pressure injection even at low load and easy injection control according to the control signal is mainly applied to the electronic control engine. have.
- the conventional mechanical fuel injection valve is a structure that injects fuel by lifting the needle only through the pressure of the fuel injected into the chamber of the nozzle unit, and the injection characteristics such as the injection timing and the injection amount of the fuel are always constant, so that the engine is operated. There is a problem that fuel injection control is not achieved independently of the condition.
- An object of the present invention for solving the above problems, unlike the conventional mechanical fuel injection valve, it is possible to control the injection timing and injection amount of the fuel in accordance with the control signal independent of the operating conditions of the engine,
- the control method delivers the high pressure fuel through the control needle to the lower pressure chamber to increase the force to lift the needle of the nozzle, so that the control of the fuel injection can be made quickly, and the structure is simple to assemble and
- the present invention provides an electronically controlled fuel injection valve that facilitates precision machining of parts along with replacement and simple processing of a flow path.
- the first flow path for the movement of the fuel injected through the fuel supply port is formed therein and the control valve housing is installed on the top A valve body;
- a nozzle unit coupled to a lower portion of the valve body and filled with a fuel supplied through a first flow passage to press the needle upward, thereby forming a nozzle chamber for lifting the needle and injecting fuel;
- a needle driving part installed inside the valve body to drive the needle of the nozzle part;
- An upper pressure chamber formed at an upper portion of the needle driver and configured to pressurize the needle driver in a downward direction by filling a fuel injected through a fuel supply hole;
- a lower pressure chamber positioned below the upper pressure chamber and configured to form a pressure for pressurizing the needle driving part upward by filling the fuel;
- a second flow path formed in the valve body via the control valve housing and connected to the lower pressure chamber to supply fuel to the lower pressure chamber;
- a control needle installed in the control valve housing to control the flow rate of the fuel supplied to the lower pressure chamber by opening and
- the needle driving unit may include a spindle installed inside the valve body to drive the needle of the nozzle unit; A pressure piston installed at an upper portion of the spindle and applying a force to the spindle in a downward direction by pressure of a fuel filled in an upper pressure chamber; And a spring installed to be fitted to the pressure piston to apply force to the spindle in a downward direction.
- the present invention is a valve body having a first flow path for the movement of the fuel injected through the fuel supply port is formed therein and the control valve housing is installed on the upper portion;
- a nozzle unit coupled to the valve body and filled with fuel supplied through a first flow path to press the needle upward, thereby forming a nozzle chamber for lifting the needle to inject fuel;
- a needle driving unit installed inside the valve body and driving the needle of the nozzle unit;
- An upper pressure chamber formed at an upper portion of the needle driver and configured to pressurize the needle driver in a downward direction by filling a fuel injected through a fuel supply hole;
- a lower pressure chamber positioned below the upper pressure chamber and configured to form a pressure for pressurizing the needle driving part upward by filling the fuel;
- a second flow path formed into the needle pressurizing part through the control valve housing and connected to the lower pressure chamber to supply fuel to the lower pressure chamber;
- a control needle installed in the control valve housing to control the flow rate of the fuel supplied to the lower pressure chamber by opening and closing the second
- the needle driving unit is installed to be fitted to the control valve housing in the valve body so that the second flow path is formed in the inner center and the needle of the nozzle portion in the downward direction by the pressure of the fuel filled in the upper pressure chamber
- a spindle for applying It is characterized in that it comprises a spring fitted to the spindle to apply a force to the spindle downward.
- the spindle characterized in that the pressure acting surface of the stepped form is formed so that the driving force acts in the upper direction under the pressure of the fuel filled in the lower pressure chamber.
- the injection needle and the injection amount of the fuel can be controlled by operating the control needle according to the control signal independently of the operating conditions of the engine.
- the control method delivers high-pressure fuel through the control needle to the lower pressure chamber to increase the force to lift the needle of the nozzle, so that fuel injection can be controlled quickly.
- the second flow path is formed inside the spindle through the control valve housing to lower the pressure. It is a very useful invention that the structure of the flow path leading to the chamber is simplified and the processing is easy.
- FIG. 1 is an exemplary view showing a fuel injection valve according to a first embodiment of the present invention
- FIG. 2 is an exemplary view showing in detail the installation structure of the control needle of the fuel injection valve according to the first embodiment of the present invention
- FIG 3 is an exemplary view showing in detail the structure of the spindle and the lower pressure chamber of the fuel injection valve according to the first embodiment of the present invention
- FIG. 4 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve according to the first embodiment of the present invention is closed and no fuel is injected;
- FIG. 5 is an exemplary view showing an operating state and a flow of fuel when a control needle of a fuel injection valve is opened and fuel is injected according to the first embodiment of the present invention
- FIG. 6 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve according to the first embodiment of the present invention is closed again to terminate the fuel injection;
- FIG. 7 is an exemplary view showing a fuel injection valve according to a second embodiment of the present invention.
- FIG. 8 is an exemplary view showing in detail the installation structure of the control needle of the fuel injection valve according to the second embodiment of the present invention.
- FIG. 9 is an exemplary view showing in detail the structure of the spindle and the lower pressure chamber of the fuel injection valve according to the second embodiment of the present invention.
- FIG. 10 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve according to the second embodiment of the present invention is closed and no fuel is injected;
- FIG. 11 is an exemplary view showing an operating state and a flow of fuel when a control needle of a fuel injection valve is opened and fuel is injected according to a second embodiment of the present invention
- FIG. 12 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve is closed again to terminate fuel injection according to the second embodiment of the present invention.
- nozzle unit 310 nozzle chamber
- FIG. 1 is an exemplary view showing a fuel injection valve according to a first embodiment of the present invention
- Figure 2 is an exemplary view showing in detail the installation structure of the control needle of the fuel injection valve according to a first embodiment of the present invention
- Figure 3 4 is a view illustrating in detail the structure of the spindle and the lower pressure chamber of the fuel injection valve according to the first embodiment of the present invention.
- FIG. 4 shows that the control needle of the fuel injection valve according to the first embodiment of the present invention is closed so that fuel is not injected.
- FIG. 5 is an exemplary view showing the operating state and the flow of fuel in the case
- Figure 5 is an illustration showing the operating state and the flow of fuel when the control needle of the fuel injection valve is opened by the fuel injection valve according to the first embodiment of the present invention
- 6 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve is closed again to terminate fuel injection according to the first embodiment of the present invention.
- the fuel injection valve 100 has a first flow path 220 formed therein so that fuel injected through the fuel supply port 210 can be moved,
- a valve body 200 having a control valve housing 281 installed therein and a fuel 320 coupled to a lower portion of the valve body 200 and supplied with fuel supplied through the first flow path 220 to be installed therein.
- the nozzle unit 300 By pressing the nozzle in the upper direction, the nozzle unit 300 is formed with a nozzle chamber 310 for lifting the needle 320 to inject fuel through the nozzle hole 330, and the valve body 200 It is installed in the interior of the needle driving unit 240 for driving the needle 320 of the nozzle unit 300, and the fuel is formed on the needle driving unit 240 and injected through the fuel supply port 210 is filled with An image for forming a pressure for pressing the needle driver 240 in the downward direction
- the pressure chamber 230 and the valve body 200 are formed at the lower portion of the upper pressure chamber 230 to fill the fuel so that pressure for pressurizing the needle driver 240 in the upper direction can be formed.
- the fuel supplied through the fuel supply port 210 may be filled by being formed in the valve body 200 through the lower pressure chamber 231 and the control valve housing 281 and connected to the lower pressure chamber 231. It is installed in the second flow path 221 and the control valve housing 281 to control the flow rate of the fuel supplied to the lower pressure chamber 231 by opening and closing the second flow path 221 according to the control signal.
- the control needle 280 and the control chamber 270 is formed in the valve body 200 to be connected to the lower pressure chamber 231 is filled with the fuel of the lower pressure chamber 231 when the fuel is discharged, and the control Formed on the valve body 200 to be connected to the chamber 270
- the fuel filled in the internal control air chamber 270 is configured to include a control orifice (271) that to be discharged to the outside of the valve body 200.
- the control needle 280 is operated by an actuator (not shown) operated according to a control signal to control the flow rate of the fuel flowing into the lower pressure chamber 231 by opening and closing the second flow passage 221. It is configured to do that.
- the needle driving unit 240, the spindle 250 is installed inside the valve body 200 to drive the needle 320 of the nozzle unit 300, and is installed on the upper portion of the spindle 250
- a pressure piston 260 that applies the force to the spindle 250 downward by the pressure of the fuel filled in the upper pressure chamber 230, and is installed to fit the pressure piston 260 to the spindle 250 It is configured to include a spring (261) for applying a force in the downward direction.
- the present invention according to the first embodiment is configured by separating the spindle 250 and the pressure piston 260 as described above, the spindle 250 and the pressure piston 260 and the valve body 200 requiring precise processing It is easy to adjust the gap between the inner diameters, thereby reducing the valve manufacturing cost.
- the high-pressure fuel that is filled in the upper pressure chamber 230 and the lower pressure chamber 231 has a gap between the inner diameter of the spindle 250 and the valve body 200 and the inner diameter of the pressure piston 260 and the valve body 200.
- the gap In order to prevent leakage, the gap must be precisely processed very small.
- the spindle 250 and the pressure piston 260 are integrally formed, there are many machining surfaces that require precision machining on one part, which makes machining difficult.
- the spindle 250 and the pressure piston 260 are separated and configured, so that the machining surface required for precise machining of each component is minimized, so that the precision machining of the components is easy.
- the spindle 250 is formed with a stepped pressure acting surface 251 so that the driving force acts in the upper direction under the pressure of the fuel filled in the lower pressure chamber 231.
- control chamber 270 and the control orifice 271 are connected to the lower pressure chamber 231 when the spindle 250 is driven upward to supply fuel in the lower pressure chamber 231 to the valve body 200.
- the connection with the lower pressure chamber 231 is blocked so that fuel is not discharged.
- the nozzle chamber 310 of the nozzle unit 300 is filled.
- control needle 280 Since the control needle 280 seals and closes the second flow path 221 in the standby period in which the fuel injection is not performed, fuel is not transferred to the lower pressure chamber 231 through the second flow path 221.
- the sum of the force acting downward from the pressure piston 260 upward by the pressure of the fuel charged in the upper pressure chamber 230 and the force acting downward by the spring 261 is applied to the nozzle chamber 310. Since the filling is greater than the force due to the pressure acting upward on the needle 320 of the nozzle unit 300, the needle 320 is maintained in a closed state so that fuel injection does not occur through the nozzle hole 330.
- the spindle is operated by the pressure acting on the needle 320 by the fuel filled in the nozzle chamber 310 of the nozzle unit 300 and the pressure acting on the spindle 250 by the fuel filled in the lower pressure chamber 231.
- a force for pushing up the needle 320 of the 250 and the nozzle unit 300 in the upper direction is filled in the upper pressure chamber 230 to the force and the spring 261 due to the pressure acting on the upper portion of the pressure piston 260.
- the needle 320 of the spindle 250 and the nozzle unit 300 is raised while being larger than the force of the force acting downward, and the fuel is injected through the nozzle hole 330.
- control needle 280 moves in a downward direction according to the control signal to block the second flow path 221 connected to the lower pressure chamber 231.
- the lower pressure chamber 231 has no fuel supply, while the fuel is discharged through the control orifice 270, and the pressure in the lower pressure chamber 231 falls.
- a force due to fuel pressure that raises the needle 320 of the spindle 250 and the nozzle unit 300 is applied to the upper portion of the pressure piston 260 that presses the needle 320 of the spindle 250 and the nozzle unit 300.
- the force of the pressure and the force of the spring 261 becomes smaller than the combined force of the needle 320 of the nozzle unit 300 is lowered to shut off the flow path while the fuel injection through the nozzle hole 330 is finished. .
- the first embodiment of the present invention which operates as described above, can control the injection timing and injection amount of fuel by operating the control needle 280 according to a control signal independently of the operating conditions of the engine. Will be.
- the fuel injection control method controls fuel injection in such a manner that the high pressure fuel is transferred to the lower pressure chamber 231 through the control needle 280 to increase the force for lifting the needle 320 of the nozzle unit 300. Can be made quickly.
- FIG. 7 is an exemplary view showing a fuel injection valve according to a second embodiment of the present invention
- Figure 8 is an exemplary view showing in detail the installation structure of the control needle of the fuel injection valve according to a second embodiment of the present invention
- Figure 9 Is an exemplary view showing in detail the structure of the spindle and the lower pressure chamber of the fuel injection valve according to the second embodiment of the present invention
- Figure 10 is a control needle of the fuel injection valve according to the second embodiment of the present invention is not injected fuel
- FIG. 11 is an illustration showing the operating state and the flow of fuel when the control needle of the fuel injection valve is opened and the fuel is injected according to the second embodiment of the present invention
- 12 is an exemplary view showing an operating state and a flow of fuel when the control needle of the fuel injection valve is closed again to terminate the fuel injection according to the second embodiment of the present invention.
- the fuel injection valve 100 has a first flow path 220 formed therein so that fuel injected through the fuel supply port 210 can be moved therein, and A valve body 200 having a control valve housing 281 installed therein and a fuel 320 coupled to a lower portion of the valve body 200 and supplied with fuel supplied through the first flow path 220 to be installed therein.
- the nozzle unit 300 By pressing upward in the upward direction, the nozzle unit 300 having the nozzle chamber 310 formed to lift the needle 320 installed therein so that fuel can be injected through the nozzle hole 330, and the
- the needle driver 240 is installed inside the valve body 200 and drives the needle 320 of the nozzle unit 300, and is formed on the needle driver 240 and injected through the fuel supply port 210.
- the pressure for pressurizing the needle driver 240 in the downward direction can be formed.
- the upper pressure chamber 230 and the valve body 200 to be positioned below the upper pressure chamber 230 to fill the fuel to the pressure to press the needle drive unit 240 upward
- the lower pressure chamber 231 and the control valve housing 281 may be formed into the needle driving unit 240 to be connected to the lower pressure chamber 231 to supply fuel to the lower pressure chamber 231. Flow rate of the fuel supplied to the lower pressure chamber 231 by being installed in the second flow passage 221 and the control valve housing 281 to open and close the second flow passage 221 according to a control signal.
- a control chamber 270 which is formed in the valve body 200 so as to be connected to the lower pressure chamber 231 and controls the fuel of the lower pressure chamber 231 to discharge the fuel;
- Valve body 200 to be connected to the control chamber 270 Is formed in the fuel filled in the inner control chamber 270 is configured to include a control orifice (271) that to be discharged to the outside of the valve body 200.
- the control needle 280 is operated by an actuator (not shown) operated according to a control signal to control the flow rate of the fuel flowing into the lower pressure chamber 231 by opening and closing the second flow passage 221. It is configured to do that.
- the needle driving unit 240 is installed to be positioned below the upper pressure chamber 230 in the valve body 200 and is filled with the upper pressure chamber 230 by the pressure of the fuel to fill the nozzle unit 300. It comprises a spindle 250 for applying a force to the needle 320 in the downward direction, and a spring 261 fitted to the spindle 250 to apply a force to the spindle 250 in the downward direction.
- the spindle 250 has an insertion hole 252 is formed in the center so that the control valve housing 281 can be inserted.
- the second flow path 221 is positioned inside the spindle 250. Since the structure of the two flow paths 221 is simple, the processing of the second flow path 221 is easy.
- the insertion hole 252 is connected to the lower pressure chamber 231 so that the fuel moved through the second flow passage 221 can be supplied to the lower pressure chamber 231 formed outside the spindle 250.
- a plurality of connection holes 253 are formed.
- the spindle 250 is formed with a stepped pressure acting surface 251 so that the driving force acts in the upper direction by the pressure of the fuel filled in the fuel in the lower pressure chamber 231.
- control chamber 270 and the control orifice 271 are connected to the lower pressure chamber 231 when the spindle 250 is driven upward to supply fuel in the lower pressure chamber 231 to the valve body 200.
- the connection with the lower pressure chamber 231 is blocked so that fuel is not discharged.
- the high-pressure fuel supplied through the fuel supply port 210 nozzles along the upper pressure chamber 230 and the first flow path 220 formed on the spindle 250
- the nozzle chamber 310 of the part 300 is filled.
- control needle 280 Since the control needle 280 seals and closes the second flow path 221 in the standby period in which the fuel injection is not performed, fuel is not transferred to the lower pressure chamber 231 through the second flow path 221.
- the sum of the force acting downward from the top of the spindle 250 by the pressure of the fuel charged in the upper pressure chamber 230 and the force acting downward by the spring 261 is filled in the nozzle chamber 310. Since the needle 320 is maintained in a closed state because it is larger than the force caused by the pressure acting upward on the needle 320 of the nozzle unit 300, fuel injection does not occur through the nozzle hole 330.
- the spindle is operated by the pressure acting on the needle 320 by the fuel filled in the nozzle chamber 310 of the nozzle unit 300 and the pressure acting on the spindle 250 by the fuel filled in the lower pressure chamber 231.
- the force pushing up the needle 320 of the 250 and the nozzle part 300 in the upper direction is filled in the upper pressure chamber 230 by the force and the spring 261 due to the pressure acting on the upper part of the spindle 250.
- the needle 320 of the spindle 250 and the nozzle unit 300 is raised while the force of the force acting in the downward direction is increased, and the fuel is injected through the nozzle hole 330.
- control needle 280 moves in a downward direction according to the control signal to block the second flow path 221 connected to the lower pressure chamber 231.
- the lower pressure chamber 231 has no fuel supply, while the fuel is discharged through the control orifice 270, and the pressure in the lower pressure chamber 231 falls.
- a force caused by the fuel pressure for raising the needle 320 of the spindle 250 and the nozzle unit 300 acts on the upper part of the spindle pressing the needle 320 of the spindle 250 and the nozzle unit 300. It becomes smaller than the combined force of the force by the force and the spring 261, the needle 320 of the nozzle unit 300 is lowered to block the flow path while the fuel injection through the nozzle hole 330 is finished.
- the present invention which operates as described above, operates the control needle 280 according to a control signal independently of an operating condition of the engine to control the injection timing and the injection amount of the fuel.
- the fuel injection control method controls fuel injection in such a manner that the high pressure fuel is transferred to the lower pressure chamber 231 through the control needle 280 to increase the force for lifting the needle 320 of the nozzle unit 300. Can be made quickly.
- the structure of the second channel is simplified, so that the processing is easy and the assembly and replacement of parts are easy.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims (5)
- 연료공급구를 통해 주입되는 연료의 이동을 위한 제1유로가 내부에 형성되고 상부에 제어밸브하우징이 설치되어 있는 밸브몸체;상기 밸브몸체의 하부에 결합되고 제1유로를 통해 공급되는 연료가 채워져 니들을 상부 방향으로 가압해줌으로써, 니들을 들어올려 연료가 분사되도록 하는 노즐챔버가 형성되어 있는 노즐부;상기 밸브몸체의 내부에 설치되어 상기 노즐부의 니들을 구동해주는 니들구동부;상기 니들구동부의 상부에 형성되고 연료공급구를 통해 주입되는 연료가 채워짐으로써 니들구동부를 하부방향으로 가압하기 위한 압력이 형성될 수 있도록 하는 상부압력챔버;상기 상부압력챔버의 하부에 위치하고 연료가 채워짐으로써 상기 니들구동부를 상부방향으로 가압하기 위한 압력이 형성될 수 있도록 하는 하부압력챔버;상기 제어밸브하우징을 거쳐서 상기 밸브몸체에 형성되고 상기 하부압력챔버에 연결되어 하부압력챔버에 연료가 공급될 수 있도록 하는 제2유로;상기 제어밸브하우징에 설치되어 제어신호에 따라 상기 제2유로를 개폐해줌으로써 하부압력챔버로 공급되는 연료의 유량을 제어해주는 제어니들;상기 하부압력챔버와 연결되도록 밸브몸체에 형성되어 연료의 배출시 하부압력챔버의 연료가 채워지는 제어챔버;상기 제어챔버에 연결되어 제어챔버 내부의 연료가 밸브몸체의 외부로 배출되도록 하는 제어오리피스;를 포함하여 구성되는 것을 특징으로 하는 전자제어 연료분사밸브.
- 제 1 항에 있어서,상기 니들구동부는,상기 노즐부의 니들을 구동할 수 있도록 상기 밸브몸체의 내부에 설치되는 스핀들;상기 스핀들의 상부에 설치되어 상부압력챔버에 채워지는 연료에 의한 압력으로 상기 스핀들을 하부방향으로 힘을 가해주는 압력피스톤;상기 압력피스톤에 끼워지도록 설치되어 상기 스핀들을 하부방향으로 힘을 가해주는 스프링;을 포함하여 구성되는 것을 특징으로 하는 전자제어 연료분사밸브.
- 연료공급구를 통해 주입되는 연료의 이동을 위한 제1유로가 내부에 형성되고 상부에 제어밸브하우징이 설치되어 있는 밸브몸체;상기 밸브몸체에 결합되고 제1유로를 통해 공급되는 연료가 채워져 니들을 상부 방향으로 가압해줌으로써, 니들을 들어올려 연료가 분사되도록 하는 노즐챔버가 형성되어 있는 노즐부;상기 밸브몸체의 내부에 설치되고 상기 노즐부의 니들을 구동해주는 니들구동부;상기 니들구동부의 상부에 형성되고 연료공급구를 통해 주입되는 연료가 채워짐으로써 니들구동부를 하부방향으로 가압하기 위한 압력이 형성될 수 있도록 하는 상부압력챔버;상기 상부압력챔버의 하부에 위치하고 연료가 채워짐으로써 상기 니들구동부를 상부방향으로 가압하기 위한 압력이 형성될 수 있도록 하는 하부압력챔버;상기 제어밸브하우징을 통해 상기 니들가압부의 내부로 형성되어 상기 하부압력챔버에 연결됨으로써 하부압력챔버에 연료가 공급될 수 있도록 하는 제2유로;상기 제어밸브하우징에 설치되어 제어신호에 따라 상기 제2유로를 개폐해줌으로써 하부압력챔버로 공급되는 연료의 유량을 제어해주는 제어니들;상기 하부압력챔버와 연결되도록 밸브몸체에 형성되어 연료의 배출시 하부압력챔버의 연료가 채워지는 제어챔버;상기 제어챔버에 연결되어 제어챔버 내부의 연료가 밸브몸체의 외부로 배출되도록 하는 제어오리피스;를 포함하여 구성되는 것을 특징으로 하는 전자제어 연료분사밸브.
- 제 3 항에 있어서,상기 니들구동부는,상기 밸브몸체의 내부에서 상기 제어밸브하우징에 끼워지도록 설치되어 제2유로가 내부 중심에 형성되고 상부압력챔버에 채워지는 연료에 의한 압력으로 상기 노즐부의 니들을 하부방향으로 힘을 가해주는 스핀들;상기 스핀들에 끼워져 스핀들을 하부방향으로 힘을 가해주는 스프링을 포함하여 구성되는 것을 특징으로 하는 전자제어 연료분사밸브.
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서,상기 스핀들에는, 상기 하부압력챔버에 채워지는 연료의 압력을 받아 상부방향으로 구동력이 작용할 수 있도록 단턱진 형태의 압력작용면이 더 형성되어 있는 것을 특징으로 하는 전자제어 연료분사밸브.
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JP2013547318A JP5779661B2 (ja) | 2010-12-28 | 2011-12-23 | 電子制御燃料噴射弁 |
CN201180062653.7A CN103282643B (zh) | 2010-12-28 | 2011-12-23 | 电子控制燃料喷射阀 |
EP11853164.9A EP2660461B1 (en) | 2010-12-28 | 2011-12-23 | Electronically controlled fuel injection valve |
US13/997,731 US9181893B2 (en) | 2010-12-28 | 2011-12-23 | Electronically controlled fuel injection valve |
US14/860,790 US9394849B2 (en) | 2010-12-28 | 2015-09-22 | Electronically controlled fuel injection valve |
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KR1020100136403A KR101211331B1 (ko) | 2010-12-28 | 2010-12-28 | 전자제어 연료분사밸브 |
KR1020100136405A KR101222411B1 (ko) | 2010-12-28 | 2010-12-28 | 전자제어 연료분사밸브 |
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KR10-2010-0136405 | 2010-12-28 |
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US13/997,731 A-371-Of-International US9181893B2 (en) | 2010-12-28 | 2011-12-23 | Electronically controlled fuel injection valve |
US14/860,790 Division US9394849B2 (en) | 2010-12-28 | 2015-09-22 | Electronically controlled fuel injection valve |
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EP (1) | EP2660461B1 (ko) |
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KR101165541B1 (ko) * | 2010-12-28 | 2012-07-16 | 현대중공업 주식회사 | 전자제어 연료분사밸브 |
EP2918816B1 (en) * | 2014-03-14 | 2017-09-06 | Continental Automotive GmbH | Fuel injector |
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CN103282643B (zh) * | 2010-12-28 | 2015-08-26 | 现代重工业株式会社 | 电子控制燃料喷射阀 |
KR101165541B1 (ko) * | 2010-12-28 | 2012-07-16 | 현대중공업 주식회사 | 전자제어 연료분사밸브 |
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JP5779661B2 (ja) | 2015-09-16 |
JP2014501359A (ja) | 2014-01-20 |
EP2660461A4 (en) | 2014-09-10 |
US20130332048A1 (en) | 2013-12-12 |
EP2660461A2 (en) | 2013-11-06 |
US9394849B2 (en) | 2016-07-19 |
CN103282643B (zh) | 2015-08-26 |
WO2012091367A3 (ko) | 2012-08-23 |
US9181893B2 (en) | 2015-11-10 |
CN103282643A (zh) | 2013-09-04 |
EP2660461B1 (en) | 2015-07-01 |
US20160040619A1 (en) | 2016-02-11 |
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