KR20020041043A - Injector - Google Patents

Injector Download PDF

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Publication number
KR20020041043A
KR20020041043A KR1020000070769A KR20000070769A KR20020041043A KR 20020041043 A KR20020041043 A KR 20020041043A KR 1020000070769 A KR1020000070769 A KR 1020000070769A KR 20000070769 A KR20000070769 A KR 20000070769A KR 20020041043 A KR20020041043 A KR 20020041043A
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KR
South Korea
Prior art keywords
fuel
injector
engine
coil
housing
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KR1020000070769A
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Korean (ko)
Inventor
봉하동
Original Assignee
이계안
현대자동차주식회사
류정열
기아자동차주식회사
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Application filed by 이계안, 현대자동차주식회사, 류정열, 기아자동차주식회사 filed Critical 이계안
Priority to KR1020000070769A priority Critical patent/KR20020041043A/en
Publication of KR20020041043A publication Critical patent/KR20020041043A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14Arrangements of injectors with respect to engines; Mounting of injectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/10Other injectors with elongated valve bodies, i.e. of needle-valve type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00Other 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
    • F02M63/0012Valves
    • F02M63/0014Valves characterised by the valve actuating means
    • F02M63/0015Valves characterised by the valve actuating means electrical, e.g. using solenoid

Abstract

PURPOSE: An injector is provided to improve performance of an engine, and to reduce exhaust gas after combustion by injecting fuel individually according to each port with applying the injector to the engine including a single cylinder and two ports. CONSTITUTION: Needle valves(25a,25b) are formed in a housing(21), and moved up and down according to current applied to a coil(28). Fuel is injected from a fuel pump to a combustion chamber with opening and closing nozzles(24a,24b) by the lower parts of the needle valves. Two nozzles are arranged in the end of the housing to inject fuel to two ports individually by an electronic control unit. Two needle valves are formed to supply or shut off fuel to each nozzle. Two armatures(26a,26b) and two springs(27a,27b) are formed to operate each needle valve, and the coil is formed to operate armatures. Performance of the engine is improved, and exhaust gas is reduced with injecting fuel individually according to each port.

Description

인젝터{Injector}Injector {Injector}

본 발명은 인젝터에 관한 것으로, 보다 상세하게는 하나의 실린더에 두 개의 포트를 가지는 엔진에 장착되어 밸브의 리프트에 따라 각각의 포트에 연료가 독립적으로 분사되도록 하기 위해 몸체 내부에 두개의 분사장치가 형성된 인젝터에 관한 것이다.The present invention relates to an injector, and more particularly, two injectors are provided in a body to be mounted on an engine having two ports in one cylinder so that fuel is independently injected to each port according to the lift of the valve. To an injector formed.

일반적으로 자동차 엔진의 연료분사는 전자제어식 시스템을 채용하고 있으며, 흡기매니폴드에 분사하는 형식이 주로 사용되고 있다. 이러한 연료분사의 근본 원리는 연료계통에 항상 일정한 압력을 가해 두었다가 인젝터의 노즐을 열어주어 흡기 매니폴드 내에 연료를 분출시키는 구조를 갖고 있다.In general, fuel injection of an automobile engine employs an electronically controlled system, and a type of injection into an intake manifold is mainly used. The basic principle of the fuel injection is to always apply a constant pressure to the fuel system, open the nozzle of the injector to eject fuel into the intake manifold.

이러한 전자식 연료분사의 제어는 각종 주행상태에서 기관의 출력성능 향상과 연비향상 및 공해 가스 저감 등을 실현하기 위한 것으로, 이를 위해 엔진의 냉각수 온도, 흡입공기의 온도, 흡기 매니폴드의 압력과 대기 압력, 차속, 스로틀 개도량, 크랭크 각 신호 등을 각종 센서를 사용하여 검출한 후 이에 기초하여 전자제어장치(ECU)에서 에어콘 릴레이, 연료펌프 릴레이, 인젝터, 점화코일, ISC 밸브 등을 제어하고 있다.The control of the electronic fuel injection is for realizing the engine's output performance, fuel efficiency, and pollution gas reduction under various driving conditions.For this purpose, the engine's coolant temperature, intake air temperature, intake manifold pressure and atmospheric pressure After detecting the vehicle speed, the throttle opening amount, the crank angle signal, and the like using various sensors, the electronic control unit (ECU) controls the air conditioner relay, fuel pump relay, injector, ignition coil, and ISC valve.

상기한 전자제어장치(ECU)에 의한 제어를 크게 나누면 분사시기 제어와 분사량 제어로 나눈다. 먼저 분사시기 제어는 점화코일의 점화신호를 사용하며, 분사량 제어는 점화코일의 점화신호와 흡입 공기량 신호에 의한 기본 분사시간을 만듬과 동시에 각 센서로부터의 검촐신호에 의해 분사시간의 보정을 행하여 인젝터를 작동시키는 최종적인 분사시간을 정하고 있다.The control by the electronic control unit (ECU) can be divided into injection timing control and injection amount control. First, the injection timing control uses the ignition signal of the ignition coil, and the injection amount control creates the basic injection time by the ignition signal and the intake air amount signal of the ignition coil, and simultaneously corrects the injection time by the detection signal from each sensor. Final injection time is set to operate.

도 3과 도 4는 상기한 종래의 인젝터를 도시한 것으로서, 인젝터(10)의 하우징(11) 내부에는 니들밸브(12)가 형성되고, 이 니들밸브(12)를 작동하기 위한 아마츄어(13)와 코일(14) 및 스프링(15) 등이 형성되어 있다.3 and 4 illustrate the above-described conventional injector, and a needle valve 12 is formed inside the housing 11 of the injector 10, and an amateur 13 for operating the needle valve 12 is provided. And a coil 14, a spring 15, and the like are formed.

즉, 상기한 니들밸브(12)는 아마츄어(13)의 작동에 의해 반복적으로 전후진되어, 하우징(11)의 끝단에 형성된 노즐(16)을 차단하거나 개방시키게 된다. 즉 코일(14)에 전류가 가해지면 아마츄어(13)가 작동되어 상기한 니들밸브(12)를 당기게 되고, 전류가 차단되면 스프링(15)의 탄력에 의해 니들밸브(13)가 원위치되도록 형성되어 있다.That is, the needle valve 12 is repeatedly moved back and forth by the operation of the amateur 13, to block or open the nozzle 16 formed at the end of the housing (11). That is, when a current is applied to the coil 14, the armature 13 is operated to pull the needle valve 12, and when the current is cut off, the needle valve 13 is formed to be in the original position by the elasticity of the spring 15. have.

이와 같이 구성되는 인젝터(10)는 하나의 실린더에 두 개의 포트가 형성되는 경우 인젝션을 두 포트에 함께 두어 연료가 분사되도록 형성되었으며, 가변밸브리프트가 적용되는 경우에는 밸브의 높이와 개방각도를 조절해서 성능향상과 유해배기가스가 저감되도록 하였다.The injector 10 configured as described above is formed so that fuel is injected by placing the injection in both ports when two ports are formed in one cylinder, and in the case where a variable valve lift is applied, the height and opening angle of the valve are adjusted. Therefore, the performance improvement and the harmful exhaust gas are reduced.

그러나 상기한 종래의 인젝터는 하나의 실린더에 두 개의 포트가 형성되는 경우에 각 상황에 맞게 연료를 분사하기가 어렸웠으며, 특히 가변밸브리프트가 적용된 엔진에서 한 쪽의 포트가 작거나 한 쪽의 포트를 비활성화시킬 경우에 인젝터는 양쪽의 포트에 연료가 동기분사되므로서 배기가스가 증가되는 문제점이 있었다.However, the above-described conventional injector has been difficult to inject fuel for each situation when two ports are formed in one cylinder, and in particular, one port is small or one side in an engine to which a variable valve lift is applied. When the port is inactivated, the injector has a problem in that the exhaust gas is increased because fuel is injected into both ports.

따라서 본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 보다 상세하게는 하나의 실린더에 두 개의 포트를 가지는 엔진에 장착되어 밸브의 리프트에 따라 각각의 포트에 연료가 독립적으로 분사되도록 하기 위해 몸체 내부에 두개의 연료분사장치가 형성되는 인젝터를 제공하는 데 목적이 있다.Accordingly, the present invention has been made to solve the above problems, more specifically, the body is mounted on the engine having two ports in one cylinder to allow the fuel to be independently injected to each port according to the lift of the valve An object of the present invention is to provide an injector in which two fuel injection devices are formed.

본 발명은 상기한 목적을 달성하기 위한 수단으로서,The present invention as a means for achieving the above object,

하우징 내부에 형성된 니들밸브가 코일에 가해지는 전류의 유무에 따라 상하이동되며, 니들밸브의 하단부가 노즐을 개폐하여 연료펌프에서 공급된 연료를 연소실에 분사하도록 하는 엔진의 인젝터에 있어서,In the injector of the engine that the needle valve formed inside the housing is moved in accordance with the presence of the current applied to the coil, the lower end of the needle valve to open and close the nozzle to inject the fuel supplied from the fuel pump into the combustion chamber,

전자제어장치의 제어에 따라서 두개의 포트에 독립적으로 연료를 분사하기 위해서 상기한 하우징의 끝단에 노즐이 나란히 두 개 형성되고, 상기 각각의 노즐로 연료가 공급되는 것을 차단 및 개방하기 위한 니들밸브가 두개 형성되며, 상기한 각각의 니들밸브를 작동하기 위한 아마츄어와 스프링이 두개씩 형성되며, 상기한 아마츄어를 작동하기 위한 코일이 형성되는 것을 특징으로 한다.According to the control of the electronic controller, two nozzles are formed side by side at the end of the housing to inject fuel independently into the two ports, and a needle valve for blocking and opening the fuel supply to each nozzle is provided. Two are formed, and the amateur and the spring for operating each of the needle valve is formed by two, characterized in that the coil for operating the amateur is formed.

도 1은 본 발명에 의해 구성된 인젝터의 단면도.1 is a cross-sectional view of an injector constructed in accordance with the present invention.

도 2는 본 발명에 의해 구성된 인젝터의 노즐부를 확대도시한 도면.Figure 2 is an enlarged view of the nozzle portion of the injector constructed in accordance with the present invention.

도 3 및 도 4는 종래기술을 설명하기 위한 도면.3 and 4 are views for explaining the prior art.

※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing

20 : 인젝터20: injector

21 : 하우징21: housing

22 : 유입구22: inlet

23 : 배선커넥터23: wiring connector

24a,24b : 노즐24a, 24b: nozzle

25a,25b : 니들밸브25a, 25b: Needle Valve

26a,26b : 아마츄어26a, 26b: amateur

27a,27b : 스프링27a, 27b: spring

28 : 코일28: coil

본 발명의 실시예를 첨부한 도면에 따라 상세하게 설명하면 다음과 같다.An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의해 구성된 인젝터의 단면도이며, 도 2는 본 발명에 의해 구성된 인젝터의 노즐부를 확대도시한 도면이다.1 is a cross-sectional view of an injector constructed in accordance with the present invention, and FIG. 2 is an enlarged view of a nozzle portion of the injector constructed in accordance with the present invention.

도면 중에 표시되는 도면부호 20은 본 발명에 의해 구성된 인젝터를 지시하는 것이며, 도면부호 21은 상기한 인젝터의 하우징을 지시하는 것이다.Reference numeral 20 shown in the drawing indicates an injector constructed by the present invention, and reference numeral 21 indicates a housing of the injector.

상기한 하우징(21)은 종래와 같이 일측에는 연료펌프에서 가압된 연료가 유입되는 유입구(22)가 형성되고, 이 유입구(22)의 전방측에는 전자제어장치(ECU)의 제어신호 등이 입력되기 위한 배선커넥터(23)가 형성된다.As described above, the housing 21 has an inlet 22 through which the fuel pressurized by the fuel pump flows in one side, and the control signal of the electronic control unit ECU is input to the front side of the inlet 22. The wiring connector 23 is formed.

그리고 상기한 하우징(21)의 타측 끝단에는 실린더의 제1포트 및 제2포트로 각각 연료를 분사하기 위한 노즐(24a,24b)이 한쌍으로 형성된다.The other end of the housing 21 is provided with a pair of nozzles 24a and 24b for injecting fuel into the first and second ports of the cylinder, respectively.

상기한 하우징(21)의 내부에는 상기 각각의 노즐(24a,24b)에 연료를 분사되도록 하기 위한 니들밸브(25a,25b)가 각각 형성되며, 상기한 니들밸브(25a,25b)를 작동하기 위한 아마츄어(26a,26b)와 스프링(27a,27b)이 각각 형성된다.Needle valves 25a and 25b for injecting fuel into the respective nozzles 24a and 24b are respectively formed in the housing 21, and for operating the needle valves 25a and 25b. Amateurs 26a and 26b and springs 27a and 27b are formed, respectively.

그리고 상기한 아마츄어(26a,26b)를 작동하기 위한 코일(28)이 형성되는데, 이 코일에 전자제어장치(ECU)에 의해 전류가 가해져 상기한 아마츄어(26a,26b)가 전후진되도록 구성된다.In addition, a coil 28 for operating the above-mentioned amateurs 26a and 26b is formed, and a current is applied to the coil by the electronic control unit ECU so that the above-described amateurs 26a and 26b are advanced back and forth.

이상과 같이 구성되는 인젝터(20)는 하나의 실린더에 두 개의 포트가 형성되는 엔진에 적용되는데, 상기 인젝터(20)의 노즐(25a,25b)이 실린더의 중앙상부로 형성되는 것이 바람직하다.The injector 20 configured as described above is applied to an engine in which two ports are formed in one cylinder, and the nozzles 25a and 25b of the injector 20 are preferably formed at the center of the cylinder.

이상과 같이 구성되는 인젝터의 작동을 설명하면 다음과 같다.Referring to the operation of the injector configured as described above is as follows.

엔진이 가동되면 전자제어장치(ECU)의 제어에 의해 실린더의 각 포트의 상황에 맞도록 상기 각각의 아마츄어(26a,26b)를 작동하게 되고, 각각의 노즐(25a,25b)에서 각각의 포트로 독립적인 연료분사가 가능하게 된다.When the engine is operated, the respective amateurs 26a and 26b are operated to match the situation of each port of the cylinder by the control of the electronic control unit (ECU), and from each nozzle 25a and 25b to each port. Independent fuel injection is possible.

본 발명에 의해 구성된 인젝터(20)의 각각의 노즐에서 연료가 분사되는 상태는 도 2에 도시되었다.The state in which fuel is injected at each nozzle of the injector 20 constructed by the present invention is shown in FIG.

즉, 전자제어장치(ECU)의 제어에 의해서 실린더의 제1포트 및 제2포트로 엔진상황에 맞게 연료가 분사된다.That is, fuel is injected into the first port and the second port of the cylinder according to the engine condition by the control of the electronic control unit ECU.

특히, 가변밸브리프트가 장착된 엔진의 경우에도 밸브의 높이와 개방각도에 따라서 각각의 포트에 독립적인 연료분사가 가능하여 엔진의 성능이 향상되고, 그 에 따라 배기가스의 배출이 저감된다.In particular, in the case of an engine equipped with a variable valve lift, independent fuel injection is possible at each port according to the height and opening angle of the valve, thereby improving engine performance and thereby reducing exhaust gas emissions.

이상과 같이 구성되는 인젝터는 하나의 실린더에 두 개의 포트가 형성되는 엔진에 적용하게 되면, 각각의 포트 상황에 맞게 연료의 독립적인 분사가 가능하게 되므로서 엔진의 성능이 향상될 뿐만 아니라, 연소 후 발생되는 배기가스도 저감되는 장점이 있는 것이다.When the injector configured as described above is applied to an engine in which two ports are formed in one cylinder, independent injection of fuel is possible according to the situation of each port, and the performance of the engine is improved as well as after combustion. Exhaust gas generated is also reduced.

Claims (1)

하우징 내부에 형성된 니들밸브가 코일에 가해지는 전류의 유무에 따라 상하이동되며, 니들밸브의 하단부가 노즐을 개폐하여 연료펌프에서 공급된 연료를 연소실에 분사되도록 구성되는 엔진의 인젝터에 있어서,In the injector of the engine is configured to move the needle valve formed inside the housing in accordance with the presence of the current applied to the coil, the lower end of the needle valve to open and close the nozzle to inject the fuel supplied from the fuel pump into the combustion chamber, 전자제어장치의 제어에 따라서 두개의 포트에 독립적으로 연료를 분사하기 위해서 상기한 하우징(21)의 끝단에 노즐(24a,24b)이 나란히 두 개 형성되고, 상기 각각의 노즐(24a,24b)로 연료가 공급되는 것을 차단 및 개방하기 위한 니들밸브(25a,25b)가 두개 형성되며, 상기한 각각의 니들밸브(25a,25b)를 작동하기 위한 아마츄어(26a,26b)와 스프링(27a,27b)이 두개씩 형성되며, 상기한 아마츄어(26a,26b)를 작동하기 위한 코일(28)이 형성되는 것을 특징으로 하는 인젝터.According to the control of the electronic controller, two nozzles 24a and 24b are formed side by side at the end of the housing 21 in order to inject fuel into two ports independently, and to each of the nozzles 24a and 24b. Two needle valves 25a and 25b are formed to block and open the fuel supply, and the amateurs 26a and 26b and the springs 27a and 27b for operating the respective needle valves 25a and 25b. The two injectors, characterized in that the coil (28) for operating the amateur (26a, 26b) is formed.
KR1020000070769A 2000-11-27 2000-11-27 Injector KR20020041043A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0547423U (en) * 1991-11-19 1993-06-25 三菱自動車工業株式会社 Diesel engine fuel injection nozzle
JPH08326629A (en) * 1995-05-31 1996-12-10 Mitsubishi Motors Corp Fluid injection device
JPH0932693A (en) * 1995-07-13 1997-02-04 Mitsubishi Motors Corp Fuel injection nozzle and fuel injection control device to control fuel injection nozzle
JPH0979113A (en) * 1995-09-07 1997-03-25 Mitsubishi Motors Corp Fuel injection device
JPH0996267A (en) * 1995-10-02 1997-04-08 Mitsubishi Motors Corp Fuel injection device
JPH10184486A (en) * 1996-10-22 1998-07-14 Isuzu Motors Ltd Fuel injection device for engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0547423U (en) * 1991-11-19 1993-06-25 三菱自動車工業株式会社 Diesel engine fuel injection nozzle
JPH08326629A (en) * 1995-05-31 1996-12-10 Mitsubishi Motors Corp Fluid injection device
JPH0932693A (en) * 1995-07-13 1997-02-04 Mitsubishi Motors Corp Fuel injection nozzle and fuel injection control device to control fuel injection nozzle
JPH0979113A (en) * 1995-09-07 1997-03-25 Mitsubishi Motors Corp Fuel injection device
JPH0996267A (en) * 1995-10-02 1997-04-08 Mitsubishi Motors Corp Fuel injection device
JPH10184486A (en) * 1996-10-22 1998-07-14 Isuzu Motors Ltd Fuel injection device for engine

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