KR20020085011A - Clamp bolt for injector - Google Patents

Clamp bolt for injector Download PDF

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Publication number
KR20020085011A
KR20020085011A KR1020010024217A KR20010024217A KR20020085011A KR 20020085011 A KR20020085011 A KR 20020085011A KR 1020010024217 A KR1020010024217 A KR 1020010024217A KR 20010024217 A KR20010024217 A KR 20010024217A KR 20020085011 A KR20020085011 A KR 20020085011A
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South Korea
Prior art keywords
bolt
clamp
injector
washer
fuel
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KR1020010024217A
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Korean (ko)
Inventor
서성웅
Original Assignee
현대자동차주식회사
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Priority to KR1020010024217A priority Critical patent/KR20020085011A/en
Publication of KR20020085011A publication Critical patent/KR20020085011A/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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

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

Abstract

PURPOSE: A clamp bolt for an injector of a diesel engine is provided to prevent the mis-assembling due to the disagreement of the central axis of a bolt and a washer by integrally forming the bolt and the washer. CONSTITUTION: An injector injecting fuel in high pressure is supported by a clamp(50) and the clamp is connected to an upper surface of a cylinder head(30) with a bolt(20). A washer part(22), of which a lower surface is formed on curved surface to contacted to the upper surface of a connection hole(52), is integrally formed to a lower side of a head(21) of the bolt for the agreement of the central axis of a bolt and a washer when the clamp is mounted to the cylinder head.

Description

디젤엔진의 인젝터 클램프용 볼트{Clamp bolt for injector}Clamp bolt for injector of diesel engine

본 발명은 디젤엔진의 인젝터 클램프용 볼트에 관한 것으로서, 보다 상세하게는 디젤엔진에서 고압의 연료가 정밀분사되는 인젝터가 흔들리지 않도록 지지하는 클램프가 체결용 볼트로써 실린더 헤드의 상면에 고정될 때, 볼트와 와셔의 중심축이 불일치되는 오장착이 방지되도록 하기 위해서 볼트와 와셔가 일체로 형성된 디젤엔진의 인젝터 클램프용 볼트에 관한 것이다.The present invention relates to a bolt for an injector clamp of a diesel engine, and more particularly, when a clamp for supporting an injector in which a high-pressure fuel is precisely injected in a diesel engine is not shaken and fixed to the upper surface of the cylinder head as a fastening bolt. The present invention relates to a bolt for an injector clamp of a diesel engine in which a bolt and a washer are integrally formed so as to prevent misalignment of the washer central axis.

디젤엔진은 실린더 내로 공기를 흡입하고 압축하게 되면 500~550℃의 압축열이 발생하는데, 이때 인젝터 노즐을 통해 고압의 연료를 분사하므로서 연료가 착화 및 연소되도록 하는 엔진이다.The diesel engine generates 500 to 550 ° C. of compressed heat when the air is sucked into the cylinder and compressed. At this time, the fuel is ignited and combusted by injecting a high-pressure fuel through the injector nozzle.

여기서, 상기와 같이 고온 고압의 연소실에 연료를 분사하는 디젤엔진의 연료공급장치를 살펴보면, 도 3에 도시된 바와 같이 연료가 저장된 연료탱크(1)와, 상기 연료탱크(1)로부터 연료를 흡입하는 피이드펌프(2)와, 상기 피이드펌프(2)에서 제공되는 연료를 여과하는 연료필터(3)와, 여과된 연료에 압력을 가하는 인젝션펌프(4)와, 인젝션펌프(4)에서 가압된 연료가 고온고압의 연소실에 분사되도록 하는 인젝터(5)로 형성된다.Here, referring to the fuel supply device of the diesel engine for injecting fuel into the combustion chamber of the high temperature and high pressure as described above, as shown in FIG. 3, the fuel tank 1 in which the fuel is stored, and the fuel is sucked from the fuel tank 1 The feed pump (2), the fuel filter (3) for filtering the fuel provided from the feed pump (2), the injection pump (4) for applying pressure to the filtered fuel and the injection pump (4) It is formed of an injector 5 which allows fuel to be injected into the combustion chamber at high temperature and high pressure.

상기한 바와 같이 구성된 디젤엔진의 연료공급장치는 인젝션펌프로부터 전달된 동력으로 작동되는 피이드펌프(2)에서 연료탱크(1)의 연료를 흡입하여 연료필터(3)로 압송하여 여과하고, 여과된 연료는 인젝션펌프(4)에서 가압된 상태로 인젝터(5)를 통해 연소실에 분사하도록 한다.The fuel supply device of the diesel engine configured as described above sucks the fuel of the fuel tank 1 from the feed pump 2 operated by the power delivered from the injection pump, transports the fuel to the fuel filter 3, and filters the filtered fuel. The fuel is injected into the combustion chamber through the injector 5 while being pressurized by the injection pump 4.

상기한 인젝터(5)는 실린더헤드(10)의 인젝터 장착부(11)에 장착되는데, 고압으로 분사되는 연료에 의해서 상당한 압력이 가해지게 된다. 따라서 엔진의 실린더헤드(10)에 장착되는 인젝터(5)의 중간부는 도 4와 같이 별도의 클램프(12)에 의해서 지지된다. 이 클램프(12)는 별도의 볼트(13)에 의해서 실린더헤드(10)의 상부면에 결합되는 것이다.The injector 5 is mounted to the injector mounting portion 11 of the cylinder head 10, and a considerable pressure is applied by the fuel injected at high pressure. Therefore, the intermediate portion of the injector 5 mounted to the cylinder head 10 of the engine is supported by a separate clamp 12 as shown in FIG. The clamp 12 is coupled to the upper surface of the cylinder head 10 by a separate bolt 13.

특히, 최근에 생산되는 커먼 레일 시스템이 장착된 엔진의 경우에는 연소소음의 감소와 오염물질의 생성을 감소시키기 위해 연소실로 고압의 연료가 분사되도록 인젝터가 정밀제어된다. 따라서, 인젝터 조립시 매우 엄격한 공차가 적용되어야 하며, 정밀하게 조립되지 않으면 시스템의 성능이 저하되므로서, 상기와 같은 클램프(12)를 이용하여 인젝터(5)가 지지되도록 구성되는 것이다.In particular, in the case of an engine equipped with a recently produced common rail system, the injector is precisely controlled so that high-pressure fuel is injected into the combustion chamber to reduce combustion noise and reduce generation of pollutants. Therefore, a very tight tolerance should be applied when injecting the injector, and if the assembly is not precisely performed, the performance of the system will be deteriorated, so that the injector 5 is supported using the clamp 12 as described above.

그리고 높은 분사압력을 보증하기 위해서는 인젝터(5)를 지지하며 장착되는 클램프(12)를 고정하는 볼트(13)의 조임토크와 축력이 중요하므로서, 클램프 장착시 클램프(12)의 체결공(12a) 상면에 별도의 와셔(14)를 안착시키고 볼트(13)로써 주어진 공차에 의해 정밀하게 체결되어야 한다.In order to ensure a high injection pressure, the tightening torque and the axial force of the bolt 13 supporting the injector 5 and the clamp 12 to be mounted are important, so that the fastening hole 12a of the clamp 12 when the clamp is mounted. A separate washer 14 must be seated on the top surface and tightened precisely by the tolerance given by the bolt 13.

그러나 상기와 와셔의 내경과 클램프를 체결하기 위한 볼트의 외경 사이의 갭(Gap)이 통상 0.8mm이상 형성되므로서, 클램프 체결시 볼트와 와셔의 중심이 정확하게 일치되지 못하고 오장착(Misalignment)되거나, 클램프 볼트의 규정 축력을 보증하지 못하게 되고, 심할 경우에는 인젝터 바디와 실린더 헤드의 불필요한 접촉으로 인해서 인젝터가 손상되는 문제점이 있었다.However, since the gap between the inner diameter of the washer and the outer diameter of the bolt for fastening the clamp is generally 0.8 mm or more, the center of the bolt and the washer may not be correctly aligned and misaligned when the clamp is fastened. There is a problem that the clamp bolt is not guaranteed the prescribed axial force, and in severe cases, the injector is damaged due to unnecessary contact between the injector body and the cylinder head.

따라서 본 발명은 상기한 문제점을 해결하기 위해서 안출된 것으로서, 보다 상세하게는 디젤엔진에서 고압의 연료가 정밀분사되는 인젝터가 흔들리지 않도록 지지하는 클램프가 체결용 볼트로써 실린더 헤드의 상면에 고정될 때, 볼트와 와셔의 중심축이 불일치되는 오장착이 방지되도록 하기 위해서 볼트와 와셔가 일체로형성된 디젤엔진의 인젝터 클램프용 볼트를 제공하는 데 목적이 있다.Therefore, the present invention has been made in order to solve the above problems, more specifically, when a clamp for supporting the injector in which the high-pressure fuel is injected precisely in a diesel engine is fixed to the upper surface of the cylinder head as a fastening bolt, It is an object of the present invention to provide a bolt for an injector clamp of a diesel engine in which a bolt and a washer are integrally formed in order to prevent misalignment of the central axis of the bolt and the washer.

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

디젤엔진에서 연료가 고압으로 분사되는 인젝터가 클램프에 의해서 지지되고, 상기 클램프는 볼트에 의해 실린더 헤드의 상면에 체결되는 것에 있어서,In the injector in which fuel is injected at a high pressure in a diesel engine is supported by a clamp, the clamp is fastened to the upper surface of the cylinder head by a bolt,

인젝터를 지지하는 클램프가 실린더 헤드에 장착되는 경우 상기 클램프의 체결공 상면에 위치되는 와셔와 볼트의 중심이 일치되도록 하기 위해, 하부면이 상기 체결공 상면에 면접되도록 곡면으로 형성되는 와셔부가 볼트의 머리부 하측에 일체로 형성되는 것을 특징으로 한다.When the clamp for supporting the injector is mounted on the cylinder head, the washer portion having a curved surface is formed such that the lower surface is interviewed with the upper surface of the fastening hole so that the center of the bolt and the washer located on the upper surface of the fastening hole of the clamp are aligned. Characterized in that formed integrally on the lower side of the head.

도 1은 본 발명에 의해 형성되는 볼트의 측면도.1 is a side view of a bolt formed by the present invention.

도 2는 본 발명에 의해 형성된 볼트가 적용된 상태의 도면.2 is a view of a state where the bolt formed by the present invention is applied.

도 3은 종래의 일반적인 디젤엔진의 연료공급장치.3 is a fuel supply device of a conventional general diesel engine.

도 4는 종래의 인젝터 체결구조를 설명하기 위한 도면.4 is a view for explaining a conventional injector fastening structure.

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

20 : 볼트 21 : 머리부20: bolt 21: head

22 : 와셔부 30 : 실린더 헤드22: washer part 30: cylinder head

31 : 인젝터 장착부 32 : 볼트공31: injector mounting portion 32: bolt hole

33 : 핀공 40 : 인젝터33: pin ball 40: injector

50 : 클램프 51 : 포크부50: clamp 51: fork portion

52 : 체결공 54 : 핀52: fastener 54: pin

이하, 본 발명의 바람직한 실시예를 첨부한 도면과 함께 상세하게 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의해 형성되는 볼트의 측면도이고, 도 2는 본 발명에 의해 형성된 볼트가 적용된 상태의 도면이다.1 is a side view of a bolt formed by the present invention, Figure 2 is a view of a state in which the bolt formed by the present invention is applied.

도면 중에 표시되는 도면부호 20은 본 발명에 의해 형성된 볼트를 지시하는 것이고, 도면부호 30은 본 발명에 의한 실린더 헤드를 지시하는 것이다.Reference numeral 20 shown in the drawing indicates a bolt formed by the present invention, and reference numeral 30 indicates a cylinder head according to the present invention.

상기한 실린더 헤드(30)의 상부 일측에는 종래와 같이 연소실에 연료를 분사하는 인젝터(40)가 장착되기 위한 인젝터 장착부(31) 형성되고, 상기 인젝터 장착부(31)의 일측 상부면에는 인젝터(40)를 지지하는 클램프(50)를 볼트(20)로써 고정하기 위한 볼트공(32)이 형성된다. 그리고 상기 볼트공(32)의 일측으로는 상기 클램프(50)의 끝단을 지지하기 위한 핀(54)이 압입되기 위한 핀공(33)이 형성된다.An injector mounting portion 31 is formed on the upper side of the cylinder head 30 to mount the injector 40 for injecting fuel into the combustion chamber as in the prior art, and the injector 40 is provided on one side of the injector mounting portion 31. ), A bolt hole 32 for fixing the clamp 50 supporting the) by the bolt 20 is formed. And a pin hole 33 for pressing the pin 54 for supporting the end of the clamp 50 is formed at one side of the bolt hole 32.

상기한 핀공(33)에는 별도로 형성되는 핀(54)이 압입되는데, 상기 핀(54)의 상부는 일정길이 상측으로 돌출되도록 형성된다.The pin hole 33 is separately formed in the pin hole 33, the upper portion of the pin 54 is formed to protrude a predetermined length upwards.

상기와 같이 형성되는 실린더 헤드(30)에는 엔진 조립시에 연료분사를 위한 인젝터(40)가 장착되는데, 상기 인젝터(40)의 중간부는 상기한 클램프(50)의 포크부(51)에 감싸여지고, 상기한 클램프(50)의 체결공(52)과 상기 실린더 헤드(30)에 형성된 볼트공(32)을 일치시킨 후 별도의 볼트(20)로써 체결되도록 한다.The cylinder head 30 formed as described above is equipped with an injector 40 for fuel injection when the engine is assembled, and the intermediate portion of the injector 40 is wrapped in the fork 51 of the clamp 50. After matching, the fastening hole 52 of the clamp 50 and the bolt hole 32 formed in the cylinder head 30 are matched to be fastened by a separate bolt 20.

이때 상기한 볼트(20)는 그 머리부(21)의 하측으로 와셔부(22)가 일체로 형성되는데, 상기 와셔부(22)는 그 하부면이 상기 클램프(50)의 상면에 면접되도록 곡면으로 형성된다. 상기한 와셔부(22)가 볼트(20)에 일체로 형성되는 가장 큰 이유는, 상기 클램프(50)를 조립할 때 볼트의 회전토크에 의해 와셔의 위치가 이동되므로서 와셔와 볼트 및 클램프의 체결공의 동심도가 어긋나게 되는 것을 방지하기 위한 것이다.At this time, the bolt 20 has a washer 22 formed integrally under the head 21, and the washer 22 has a curved surface such that its lower surface is interviewed with the upper surface of the clamp 50. Is formed. The reason why the washer 22 is integrally formed on the bolt 20 is that when the clamp 50 is assembled, the position of the washer is moved by the rotational torque of the bolt, so that the washer is fastened to the bolt and the clamp. This is to prevent the concentricity of the ball.

이상과 같이 형성된 볼트로써 상기 인젝터의 클램프를 지지하는 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention for supporting the clamp of the injector with the bolt formed as described above are as follows.

커먼 레일 시스템이 적용되는 최근의 디젤엔진은 인젝터의 정밀제어를 통해 고압의 연료가 분사되도록 하므로서 커먼 레일 시스템의 장점인 연소소음의 감소와 오염물질의 생성을 감소시키게 된다. 이때 인젝터 조립시에 매우 엄격한 공차가 적용되며 정밀하게 조립되지 않으면 연료를 분사하는 시스템의 성능이 저하된다. 따라서 이를 구성하는 부품들의 조립과정에서 조립오차가 발생되지 않도록 주의해야만 한다.Recent diesel engines with common rail systems allow high-pressure fuel to be injected through precise control of the injector, thereby reducing combustion noise and contaminant generation, which are advantages of the common rail system. Very tight tolerances are applied to the assembly of the injector, and if not assembled correctly, the performance of the fuel injection system is degraded. Therefore, care must be taken to avoid assembly errors during the assembly of the components.

인젝터(40)를 실린더 헤드(30)에 장착하는 과정에서 상기한 볼트(20)로써 인젝터(40)의 일측을 잡고 있는 클램프(50)를 고정하게 되는데, 본 발명에 의해 형성된 볼트(20)는 그 머리부(21) 하측으로 와셔부(22)가 일체로 형성되어 있므로서 별도의 와셔를 개재하지 않고도 상기한 클램프(50)를 체결하게 된다.In the process of mounting the injector 40 to the cylinder head 30 to fix the clamp 50 holding the one side of the injector 40 with the bolt 20, the bolt 20 formed by the present invention is Since the washer 22 is integrally formed under the head 21, the clamp 50 is fastened without interposing a separate washer.

상기와 같이 형성된 볼트(20)로써 클램프(50)를 체결하게 되면, 볼트를 체결하는데 소요되는 작업시간이 단축되고, 인젝터의 정확한 장착이 이루어진다.When the clamp 50 is fastened with the bolt 20 formed as described above, the work time required to fasten the bolt is shortened, and the injector is correctly mounted.

따라서 본 발명에 의해 형성된 볼트로서 클램프를 체결하게 되면 볼트 및 와셔의 오장착(Misalignment)이 방지되며, 클램프 볼트의 규정출력도 보증할 수 있게 된다.Accordingly, when the clamp is fastened as the bolt formed by the present invention, misalignment of the bolt and the washer is prevented, and the specified output of the clamp bolt can be guaranteed.

또한, 볼트 및 와셔의 오장착으로 인한 인젝터의 몸체와 실린더 헤드 사이의 무리한 접촉을 피하게 되므로서 볼트의 응력이 한 곳으로 집중되는 현상이 방지된다.In addition, by avoiding excessive contact between the cylinder head and the body of the injector due to incorrect mounting of the bolt and the washer, the phenomenon that the stress of the bolt is concentrated in one place is prevented.

이상과 같이 와셔부가 일체로 형성된 볼트로써 실린더 헤드의 상부에 형성되는 인젝터를 지지하는 클램프를 체결하게 되면, 체결시 와셔와 볼트의 동심도가 일치된 상태가 그대로 유지되므로서 볼트의 오장착이 방지되며, 클램프 볼트의 규정출력이 보증될 뿐만 아니라, 볼트 및 와셔의 오장착으로 인한 인젝터의 몸체와 실린더 헤드 사이의 무리한 접촉을 피하게 되므로서 볼트의 응력이 한 곳으로 집중되는 현상이 방지되는 장점이 있는 것이다.As described above, when the clamp for supporting the injector formed on the upper portion of the cylinder head is fastened by the bolt having the washer unit integrally, the concentricity of the washer and the bolt is maintained in the same state, thereby preventing the wrong mounting of the bolt. In addition to ensuring the specified output of the clamp bolt, it avoids excessive contact between the body of the injector and the cylinder head due to incorrect mounting of the bolt and washer, thereby preventing the concentration of bolt stress in one place. It is.

Claims (1)

디젤엔진에서 연료가 고압으로 분사되는 인젝터가 클램프에 의해서 지지되고, 상기 클램프는 볼트에 의해 실린더 헤드의 상면에 체결되는 것에 있어서,In the injector in which fuel is injected at a high pressure in a diesel engine is supported by a clamp, the clamp is fastened to the upper surface of the cylinder head by a bolt, 인젝터(40)를 지지하는 클램프(50)가 실린더 헤드(30)에 장착되는 경우 상기 클램프(50)의 체결공(52) 상면에 위치되는 와셔와 볼트의 중심이 일치되도록 하기 위해, 하부면이 상기 체결공(52) 상면에 면접되도록 곡면으로 형성되는 와셔부(22)가 볼트(20)의 머리부(21) 하측에 일체로 형성되는 것을 특징으로 하는 디젤엔진의 인젝터 클램프용 볼트.When the clamp 50 supporting the injector 40 is mounted to the cylinder head 30, the lower surface is set so that the center of the bolt and the washer positioned on the upper surface of the fastening hole 52 of the clamp 50 coincide with each other. Bolts for injector clamps of diesel engines, characterized in that the washer portion 22 is formed in a curved surface so as to be interviewed on the upper surface of the fastening hole (52) integrally formed under the head (21) of the bolt (20).
KR1020010024217A 2001-05-04 2001-05-04 Clamp bolt for injector KR20020085011A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708809A (en) * 2018-07-26 2018-10-26 江苏农华智慧农业科技股份有限公司 A kind of fuel injector is fixed and clamped device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59105965A (en) * 1982-12-10 1984-06-19 Yanmar Diesel Engine Co Ltd Fuel valve fixing device for multi-valve type internal- combustion engine
JPH0592468U (en) * 1992-05-22 1993-12-17 日産ディーゼル工業株式会社 Fuel injection nozzle mounting device for internal combustion engine
JPH0914084A (en) * 1995-06-26 1997-01-14 Isuzu Motors Ltd Clamping device for fuel injection nozzle
JPH1182242A (en) * 1997-09-11 1999-03-26 Toyota Motor Corp Injection nozzle fixing structure of internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59105965A (en) * 1982-12-10 1984-06-19 Yanmar Diesel Engine Co Ltd Fuel valve fixing device for multi-valve type internal- combustion engine
JPH0592468U (en) * 1992-05-22 1993-12-17 日産ディーゼル工業株式会社 Fuel injection nozzle mounting device for internal combustion engine
JPH0914084A (en) * 1995-06-26 1997-01-14 Isuzu Motors Ltd Clamping device for fuel injection nozzle
JPH1182242A (en) * 1997-09-11 1999-03-26 Toyota Motor Corp Injection nozzle fixing structure of internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708809A (en) * 2018-07-26 2018-10-26 江苏农华智慧农业科技股份有限公司 A kind of fuel injector is fixed and clamped device

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