KR910003538Y1 - Fuel injector - Google Patents

Fuel injector

Info

Publication number
KR910003538Y1
KR910003538Y1 KR2019880017293U KR880017293U KR910003538Y1 KR 910003538 Y1 KR910003538 Y1 KR 910003538Y1 KR 2019880017293 U KR2019880017293 U KR 2019880017293U KR 880017293 U KR880017293 U KR 880017293U KR 910003538 Y1 KR910003538 Y1 KR 910003538Y1
Authority
KR
South Korea
Prior art keywords
injection
fuel
working space
nozzle
fuel injection
Prior art date
Application number
KR2019880017293U
Other languages
Korean (ko)
Other versions
KR900008543U (en
Inventor
주규엽
Original Assignee
대우중공업 주식회사
이경훈
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 대우중공업 주식회사, 이경훈 filed Critical 대우중공업 주식회사
Priority to KR2019880017293U priority Critical patent/KR910003538Y1/en
Publication of KR900008543U publication Critical patent/KR900008543U/en
Application granted granted Critical
Publication of KR910003538Y1 publication Critical patent/KR910003538Y1/en

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Classifications

    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • 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
    • 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

Landscapes

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

Abstract

내용 없음.No content.

Description

연료 분사 노즐Fuel injection nozzle

제 1 도는 본 고안의 구조를 나타낸 단면도.1 is a cross-sectional view showing the structure of the present invention.

제 2a, b 도는 본 고안의 작동상태 단면도.2a, b is a cross-sectional view of the operating state of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 흡입구 11 : 접시홈10: suction port 11: dish groove

12 : 작동공간 13 : 바이패스관12: operating space 13: bypass pipe

14 : 바이패스 밸브 15 : 엑췌이터14: bypass valve 15: extractor

본 고안은 디젤엔진에 사용되는 연료분사노즐에 관한 것으로서, 특히 연료분사노즐의 연료 흡입구 일측에 바이패스 밸브를 설치하여, 연료 분사펌프로 부터 압송된 연료를 필요에 따라 연소실 내로 분사시키지 않고 우회토록 하므로서 시동시 백연발생 저감과 공회전시의 연료절감을 꾀할 수 있도록 안출된 것이다.The present invention relates to a fuel injection nozzle used in a diesel engine, and in particular, by installing a bypass valve on one side of the fuel inlet of the fuel injection nozzle, the fuel pumped from the fuel injection pump is bypassed without being injected into the combustion chamber as necessary. Therefore, it is devised to reduce the generation of white smoke at start-up and to save fuel at idle.

종래에는 연료분사 펌프 플런져의 경사홈을 변경하여 일정각도(일정회전수) 이하에서는 연료의 압송이 불가능토록 하였다.In the related art, the inclined groove of the fuel injection pump plunger was changed to make it impossible to pump fuel at a certain angle (constant rotational speed) or less.

그러나 이는, 연료분사 펌프의 경사홈 형상에 의해 연료분사가 결정되기 때문에 운전자의 임의로 연료분사의 가부를 결정할 수 없어서, 전실린더에서 연소가 진행되어 부하를 효과적으로 가할 수 없었다.However, since the fuel injection is determined by the inclined groove shape of the fuel injection pump, the driver cannot arbitrarily determine whether the fuel injection is performed, and thus, combustion proceeds in all the cylinders, and thus the load cannot be effectively applied.

또한, 연료 분사펌프 조립체는 일반차량이나 특장차의 용도에 맞게 조속기를 변경시켜 사용하였으나, 기종에 따라 필요이상의 연료를 낭비하게 되어 플런져의 홈 형상을 다수 변경해야만 하므로, 기종에 따라 플런져를 교환해야하기 때문에 작업이 매우 번거롭게 되는 문제점을 지니고 있었다.In addition, although the fuel injection pump assembly is used by changing the governor according to the use of a general vehicle or a special vehicle, it is necessary to change the plunger groove shape according to the model because it wastes more fuel than necessary according to the model. The task was very cumbersome because it had to be done.

따라서 본 고안은 상기와 같은 종래의 문제점을 해결하기 위하여 연료흡입구 일측에 바이패스관을 설치하여 연료분사와 무분사의 조정을 회전수에 관계없이 연료분사 노즐측에서 조정할 수 있도록 한 것이다.Therefore, the present invention is to provide a bypass pipe on one side of the fuel inlet in order to solve the conventional problems as described above to adjust the fuel injection and the non-injection at the fuel injection nozzle side irrespective of the rotational speed.

이를 첨부된 도면에 따라 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.

연료분사펌프로 부터 공급된 고압의 연료가 분사 홀더 본체의 흡입구(10)와 주입관(24)을 통해 주입되어 분사홀더 내측에 탄설된 푸쉬로드(22)에 의해 연소실내로 연료의 분사를 제어하는 연료분사 노즐에 있어서, 흡입구 상측에는 말단부에 접시홈(11)을 구비한 작동공간(12)을 관통형성하고, 그 내부에서 접시형상의 바이패스밸브(14)가 개폐동작토록 엑췌이터(15)를 고정설치하고, 작동공간(12)과 상기 분사홀더 본체(20)의 내측에 압축스프링체(23)가 탄동설치된 작동공간부(21)를 연결하는 바이패스관(13)을 형성하여 여분의 연료가 배기관(25)을 통하여 연료탱크로 회송토록 한 것이다.The high-pressure fuel supplied from the fuel injection pump is injected through the inlet 10 and the injection tube 24 of the injection holder main body to control the injection of fuel into the combustion chamber by the push rod 22 installed inside the injection holder. In the fuel injection nozzle, an inlet port is formed with a working space 12 having a dish groove 11 at the distal end thereof, and therein the exciter 15 for opening and closing the dish-shaped bypass valve 14 therein. ) And a bypass tube 13 connecting the working space 12 and the working space 21 in which the compression spring body 23 is installed in the inner side of the injection holder main body 20 is spared. Fuel is returned to the fuel tank through the exhaust pipe (25).

이와같이 구성된 본 고안의 작동상태를 설명하면 다음과 같다.Referring to the operating state of the present invention configured as described above are as follows.

분사펌프(1)로 부터 압송된 고압의 연료가 분사노즐의 정상적인 가동상태에서는 흡입구(10)를 통하여 주입되면서 분사홀더의 본체(20) 내측에 길이방향으로 형성된 주입관(24)을 통하여 노즐의 색홀(31)에 도달하게 되면, 작동공간부(21)내에서 탄력적으로 작용하고 있는 압축스프링체(23)에 의해 푸쉬로드(22) 말단부가 노즐의 분사구(32)를 막고있는 상태에서, 분사펌프로부터 압송된 높은 압력의 연료가 푸쉬로드 말단부에 작용하면서 푸쉬로드(22)가 상승되게 되어 노즐의 분사구(32)가 개방되므로서 연소실(도면에 도시하지 않았음)내로 연료가 무화분사되는 것이다.The high-pressure fuel pumped from the injection pump 1 is injected through the inlet 10 in the normal operation state of the injection nozzle, and is injected through the injection tube 24 formed in the longitudinal direction inside the main body 20 of the injection holder. When the color hole 31 is reached, the spray rod 22 distal end blocks the injection port 32 of the nozzle by the compression spring body 23 that is elastically acting in the working space 21. The high pressure fuel pumped from the pump acts on the push rod end portion, causing the push rod 22 to rise, opening the nozzle injection port 32 and atomizing the fuel into the combustion chamber (not shown). .

이때, 운전자가 필요에 따라 연소실내로 연료를 분사치않으려면, 엑췌이터(15)에 동력을 인가시키게 되면 접시형의 바이패스 밸브(14)가 제 2b 도와 같이 하강하게 되어 작동공간(12)이 개방됨과 동시, 연료분사펌프에서 압송된 연료가 흡입구(10) 상측의 작동공간(12)으로 유입되면서, 작동공간과 분사홀더 본체(20) 내측의 작동공간부(21) 사이에 연결된 바이패스관(13)을 통해 작동공간부(21)로 유입되면서, 상측의 배기관(25)을 통해 연료탱크(2)로 회송되므로서 연료가 연소실측으로 분사되지 못하게 되는 것이다.At this time, if the driver does not inject fuel into the combustion chamber as needed, when the exciter 15 is powered, the dish-type bypass valve 14 is lowered as shown in FIG. Simultaneously with this opening, the fuel pumped from the fuel injection pump flows into the working space 12 above the inlet 10, and is connected between the working space and the working space 21 inside the injection holder body 20. As it flows into the working space 21 through the pipe 13, it is returned to the fuel tank 2 through the upper exhaust pipe 25 so that fuel is not injected to the combustion chamber side.

그리고, 상기 바이패스 밸브(14)의 형상을 접시형으로 형성하여서 분사노즐이 정상가동시 상당히 높은 압력으로 주입되는 연료에 의해 바이패스 밸브(14)가 개방되지 않고 주입관(24)을 통하여 연소실내로 전량분사토록 된 것이다.In addition, the bypass valve 14 is formed in a dish shape so that the bypass valve 14 is not opened by the fuel injected at a considerably high pressure during the normal operation of the bypass valve. It has been sprayed entirely.

이상과 같이 구성되어 작용하는 본 고안은, 회전수 변화에 관계없이 엑췌이터의 동력원을 온-오프시킴에 따라 임의로 분사와 무분사를 결정할 수 있어, 시동시 고회전수에서 일부분사만 하여 연소실의 온도를 신속하게 올려 백연발생을 저감하고, 공회전시에는 회전수에 관계없이 탑재장비의 공회전수에 맞춰 부분 분사를 실시할수 있으므로서 연료절감 효과를 얻을 수 있으며 종래의 모든 폐단을 완벽하게 해소하는 매우 유용한 고안이다.The present invention, which is configured and operated as described above, can randomly determine the injection and spraying by turning on and off the power source of the extractor regardless of the rotational speed. It is possible to reduce the occurrence of white smoke quickly, and at the time of idling, partial injection can be carried out according to the idling speed of the installed equipment regardless of the number of revolutions. It is devised.

Claims (1)

연료분사펌프로부터 압송된 고압의 연료가 분사홀더 본체의 흡입구와 주입관을 통해 주입되어, 노즐의 분사구를 통해 연소실내로 무화분사되는 연료 분사노즐에 있어서, 상기 흡입구 상측에는 말단부에 접시홈(11)을 구비한 작동공간(12)과, 분사홀더 본체 내측에 압축스프링체(23)가 탄설된 작동공간부(21) 사이를 연결하는 바이패스관(13)을 형성하고, 상기 작동공간의 접시홈(11)을 개폐시킬 접시형상의 바이패스밸브(14)를 구비한 엑췌이터(15)가 고정설치됨을 특징으로 하는 연료 분사노즐.In the fuel injection nozzle in which the high-pressure fuel pumped from the fuel injection pump is injected through the inlet and the injection tube of the injection holder main body, and atomized injection into the combustion chamber through the injection port of the nozzle, the dish groove 11 at the distal end above the suction port. ) And a bypass tube (13) connecting the working space (12) and the working space (21) in which the compression spring body (23) is installed in the injection holder body. And an extractor (15) having a dish-shaped bypass valve (14) for opening and closing the groove (11).
KR2019880017293U 1988-10-26 1988-10-26 Fuel injector KR910003538Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880017293U KR910003538Y1 (en) 1988-10-26 1988-10-26 Fuel injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880017293U KR910003538Y1 (en) 1988-10-26 1988-10-26 Fuel injector

Publications (2)

Publication Number Publication Date
KR900008543U KR900008543U (en) 1990-05-03
KR910003538Y1 true KR910003538Y1 (en) 1991-05-31

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ID=19280552

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880017293U KR910003538Y1 (en) 1988-10-26 1988-10-26 Fuel injector

Country Status (1)

Country Link
KR (1) KR910003538Y1 (en)

Also Published As

Publication number Publication date
KR900008543U (en) 1990-05-03

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