• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a multi-nozzle injector for injecting fuel into a combustion chamber of a diesel engine, and includes a fuel storage chamber (A) in which fuel pressurized by a fuel pump is pressurized and stored through a fuel supply path (55), and the fuel storage chamber (A). A plurality of injection passages 80 and 90 connected to the fuel passage and having different inner diameters, and a plurality of nozzles 85 and 95 respectively formed at ends of the injection passages 80 and 90 to inject fuel. ), A plunger 70 inherent in the fuel storage chamber A, which is moved up and down to pass fuel to any one of the plurality of injection passages 80 and 90, and the plunger 70 under the control of the ECU 50. ) Is composed of a rotary solenoid 60 to move up and down, and by adjusting the amount of fuel injected into the combustion chamber according to the engine conditions, fuel consumption is improved and fuel gas is reduced by a small amount of fuel injection at low speed and low load of the engine. To a multi-nozzle injector of a diesel engine.
    公开号:KR19980044428A
    申请号:KR1019960062521
    申请日:1996-12-06
    公开日:1998-09-05
    发明作者:이세영
    申请人:박병재；현대자동차 주식회사；
    IPC主号:
    专利说明:

    Multi-nozzle injectors in diesel engines
    The present invention relates to an injector for injecting fuel into a combustion chamber of a diesel engine, and in particular, by forming two nozzles having different inner diameters and adjusting the amount of fuel injected into the combustion chamber according to engine conditions, a small amount of fuel injection is performed at low speed and low load of the engine. The present invention relates to a multi-nozzle injector of a diesel engine that improves fuel economy and reduces exhaust gas.
    In general, a diesel engine for automobiles sucks and compresses only air in a cylinder, and when the temperature of the air increases, the fuel is injected at high pressure into mist-shaped particles, and the injected fuel is self-ignited and burned by the heat of compressed air. Power is obtained by the pressure of the gas generated at this time. The fuel of the diesel engine is supplied from a fuel pump and injected into the combustion chamber through an injector.
    The injector of the conventional diesel engine has a fuel supply passage 12 formed in the main body 11 connected to a main body 11 forming an injector, a fuel pump for supplying fuel at high pressure, as shown in FIG. A nozzle 13 formed at the end of the fuel supply passage 12 to inject fuel, a needle valve 14 for opening and closing the nozzle 13, and a plunger connected to an upper end of the needle valve 14 to move up and down (15), the solenoid coil (16) for moving the plunger (15) up and down to open the nozzle (13), and the plunger (15) to close the nozzle (13) with the plunger (15) in place. It consists of a return spring 17 for pushing and an ECU 20 for controlling the solenoid coil 16.
    Operation of the injector of the diesel engine configured as described above is as follows.
    When the ECU 20 determines the fuel injection amount according to the high pressure and the low pressure, and sends a signal to the solenoid valve 16, the solenoid valve 16 becomes an electromagnet to pull the plunger 15 upward. At the same time, the needle valve 14 is also moved upwards and the nozzle 13 is opened.
    At this time, when the fuel pressurized by the fuel pump is waiting at a high pressure in the fuel supply passage 12 and the nozzle 13 is opened, fuel is injected into the combustion chamber through the nozzle 13. .
    On the contrary, when no magnetic field is formed in the solenoid coil 16 under the control of the ECU 20, the plunger 15 is moved in the direction of the nozzle 13 by the return spring 17, wherein the needle valve 14 closes the nozzle 13 by the movement of the plunger 15. Therefore, the fuel pressurized by the fuel pump is not injected into the combustion chamber but remains in the standby state.
    Here, the fuel injection amount injected into the combustion chamber is determined by the time that the needle valve 14 is opened. That is, when the fuel injection signal of the ECU 20 comes, the solenoid coil 16 operates to suck the plunger 15, and the needle valve 14 integrally formed with the plunger 15 is retracted. The nozzle 13 is opened. Therefore, the fuel injection amount is determined by the time when the current flows through the solenoid coil 16 and the needle valve 14 opens the nozzle 13.
    In particular, current trends tend to minimize the amount of fuel injected during fuel atomization and ignition delay periods by reducing the nozzle size and increasing the injection pressure to increase fuel injection volume to improve combustion performance.
    However, the injector of the conventional diesel engine constructed and operated as described above has a problem in that the engine has a limit in increasing the injection pressure under a high speed and high load, and there is a problem in that an appropriate amount of fuel is not injected when the nozzle hole is small.
    The present invention has been made to solve the above problems, a diesel engine to improve the combustion performance and fuel efficiency of the engine by reducing the exhaust gas by selectively injecting fuel through two nozzles of different inner diameters according to the load of the engine To provide a multi-nozzle injector.
    1 is an internal schematic view showing an injector of a conventional diesel engine,
    2 is a diagram illustrating an internal configuration of a multi-nozzle injector of a diesel engine according to the present invention.
    Explanation of symbols for the main parts of the drawings
    50: ECU 55: fuel supply path 60: rotary solenoid
    62 coil portion 64 male thread rod 70 plunger
    72: operating portion 74: valve portion 76: outlet
    80: injection communication path 85: son nozzle 90: injection passage
    95: large nozzle A: fuel storage room
    In the multi-nozzle injector of the diesel engine of the present invention for realizing the above object, in the injector of the diesel engine for injecting the fuel pressurized by the fuel pump to the combustion chamber according to the signal of the ECU, the fuel pressurized by the fuel pump is stored And a plurality of injection passages connected to the fuel storage compartment, the fuel passage being formed and having different internal diameters, a plurality of nozzles respectively formed at ends of the plurality of injection passages, and fuel injected therein; And a plunger vertically moved to allow fuel to pass through any one of the plurality of injection passages, and a rotary solenoid for vertically moving the plunger under the control of the ECU.
    Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
    As shown in FIG. 2, the multi-nozzle injector of the diesel engine according to the present invention includes a fuel storage chamber A in which fuel pressurized by a fuel pump is pressurized and stored through a fuel supply path 55, and the fuel storage chamber A A plurality of injection passages 80 and 90 connected to the fuel passages and having different inner diameters, and a plurality of nozzles 85 and 95 respectively formed at ends of the injection passages 80 and 90 to inject fuel; And a plunger 70 inherent in the fuel storage chamber A and vertically moved to allow fuel to pass through any one of the plurality of injection passages 80 and 90, and the plunger 70 under the control of the ECU 50. It consists of a rotary solenoid 60 to move up and down.
    Here, the injection passage (80, 90) and the nozzle (85, 95) is an injection communication path 80 and the small nozzle 85 is injected a predetermined amount or less of fuel, and the injection communication path 80 and the small nozzle ( 85) is formed of an injection passage (90) and a large nozzle (95) in which a larger diameter is formed and a predetermined amount or more of fuel is injected.
    In particular, the injection communication path 80 and the injection passage 90 are formed to have different heights of the inlet portion connected to the fuel storage chamber A.
    In addition, the plunger 70 has an operating part 72 having a female screw formed thereon so as to be connected to a part of the rotary solenoid 60 on the upper side thereof, and a cylindrical body formed below the operating part 72 and the fuel storage chamber A. It is composed of a valve portion 74 is located within the discharge port 76 is formed to discharge the fuel to the injection passage (80,90).
    In addition, the rotary solenoid 60 is rotated at the center of the coil portion 62 and the coil portion 62 to form a magnetic field under the control of the ECU 50 to move the plunger 70 up and down. It consists of a male threaded rod 64 coupled to the female screw of the plunger 70.
    Referring to the operation of the multi-nozzle injector of the diesel engine of the present invention configured as described above are as follows.
    When the engine is operated at high speed and high load while the fuel pressurized by the fuel pump is waiting in the fuel storage chamber A through the fuel supply path 55, the ECU 50 determines this and operates the rotary solenoid 60. The rotary solenoid 60 is a magnetic field is formed in the coil portion 62 by the control of the ECU 50, the male screw 64 is rotated accordingly.
    When the male threaded rod 64 of the rotary solenoid 60 rotates, the operating portion 72 of the plunger 70 having the female thread is rotated along the thread, and the valve portion 74 of the plunger is also raised. . At this time, the discharge port 76 formed in the valve portion 74 and the injection passage 90 is in communication with each other, the fuel in the fuel storage chamber A passes through the discharge hole 76 and the injection passage 90 to the large nozzle. Through 95 is injected into the combustion chamber. Here a relatively large amount of fuel is injected.
    Unlike the above, when the engine 50 determines the low speed low load state and controls the rotary solenoid 60, the external thread rod 64 rotates as opposed to the high speed of the engine so that the plunger 70 is rotated. Will move downward. At this time, the outlet port 76 of the plunger 70 and the injection communication path 80 is in communication with the fuel is passed through a small amount of fuel is injected through the nozzle (85).
    Since the multi-nozzle injector of the diesel engine according to the present invention configured and acts as described above, the ECU 50 determines this according to the engine load, and controls and injects fuel through two nozzles 85 and 95 having different inner diameters. Supplying a suitable amount of fuel in accordance with the engine load has the advantage of improving fuel economy as well as reducing the exhaust gas.
    权利要求:
    Claims (5)
    [1" claim-type="Currently amended] In the injector of a diesel engine for injecting the fuel pressurized by the fuel pump to the combustion chamber in accordance with the signal of the ECU,
    A fuel storage chamber in which the fuel pressurized by the fuel pump is stored, a plurality of injection passages connected to the fuel storage chamber and having fuel passed therein, the inner diameters being different from each other, and a plurality of injection passages formed at the ends of the plurality of injection passages, respectively; Engine comprising: two nozzles, a plunger inherent in the fuel reservoir and moving up and down to allow fuel to pass through any one of the plurality of injection passages, and a rotary solenoid for moving the plunger up and down by the control of the ECU Multi-nozzle injector.
    [2" claim-type="Currently amended] The method of claim 1,
    The injection passage and the nozzle may be formed of an injection passage and a nozzle for injecting a predetermined amount or less of fuel, and an injection passage and a large nozzle in which a relatively larger diameter is formed than the injection passage and the nozzle, and a predetermined amount of fuel is injected. The multi-nozzle injector of the diesel engine, characterized in that.
    [3" claim-type="Currently amended] The method of claim 2,
    The injection nozzle and the injection passage is a multi-nozzle injector of the diesel engine, characterized in that the height of the inlet portion connected to the fuel storage chamber is formed different from each other.
    [4" claim-type="Currently amended] The method of claim 1,
    The plunger includes an operating part having a female threaded portion connected to a portion of the rotary solenoid at an upper side thereof, and a valve part formed of a cylindrical body at the lower side of the operating part and disposed in the fuel storage chamber and having a discharge port configured to discharge fuel into the injection passage. The multi-nozzle injector of the diesel engine, characterized in that.
    [5" claim-type="Currently amended] The method of claim 4, wherein
    The rotary solenoid is a diesel engine comprising a coil part for forming a magnetic field under the control of the ECU, and a male screw rod which is rotated at the center of the coil part and coupled with the female screw of the plunger to move the plunger up and down. Multi-nozzle injector.
    类似技术:
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    同族专利:
    公开号 | 公开日
    JP3008276B2|2000-02-14|
    KR100190871B1|1999-06-01|
    DE19754112A1|1998-06-10|
    JPH10311269A|1998-11-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1996-12-06|Application filed by 박병재, 현대자동차 주식회사
    1996-12-06|Priority to KR1019960062521A
    1998-09-05|Publication of KR19980044428A
    1999-06-01|Application granted
    1999-06-01|Publication of KR100190871B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019960062521A|KR100190871B1|1996-12-06|1996-12-06|Multi nozzle injector of a diesel engine|
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