KR20020004005A - Conjunction structure of spring seat for high pressure pump of accumulating pressure type fuel injection system - Google Patents
Conjunction structure of spring seat for high pressure pump of accumulating pressure type fuel injection system Download PDFInfo
- Publication number
- KR20020004005A KR20020004005A KR1020000036466A KR20000036466A KR20020004005A KR 20020004005 A KR20020004005 A KR 20020004005A KR 1020000036466 A KR1020000036466 A KR 1020000036466A KR 20000036466 A KR20000036466 A KR 20000036466A KR 20020004005 A KR20020004005 A KR 20020004005A
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- KR
- South Korea
- Prior art keywords
- high pressure
- pressure pump
- spring seat
- spring
- barrel
- Prior art date
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/48—Assembling; Disassembling; Replacing
Abstract
Description
본 발명은 축압식 연료분사시스템에 있어서, 축압실로 고압연료를 가압 압송하는 고압펌프에 조립되는 바렐의 조립성을 용이하게 하기 위한 축압식 연료분사시스템의 고압펌프 스프링시트 취부구조에 관한 것이다.The present invention relates to a high pressure pump spring sheet mounting structure of a pressure fuel injection system for facilitating the assembly of a barrel assembled to a high pressure pump for pressurizing and transporting the high pressure fuel to the pressure storage chamber in the pressure storage fuel injection system.
내연기관용 축압식 연료분사시스템은 도 1 의 도시와 같이, 고압펌프(1)가 설치되어 있고, 상기 연료 고압펌프가 고압축압실(2)에 연료를 압송하도록 되어 있으며, 상기 고압 축압실이 고압도관(3)을 거쳐서 연료를 공급하고 싶은 내연기관 연소실에 돌입한 분사밸브(5)에 접속되어 있으며, 상기 분사밸브(5)의 개폐 운동이 각각 상기 고압도관(3)에서 상기 분사밸브(5)에 배치된 전자적으로 제어되는 제어밸브(4)에 의해 제어되도록 되어 있다.As shown in FIG. 1, the accumulating fuel injection system for an internal combustion engine is provided with a high pressure pump 1, and the fuel high pressure pump is configured to pump fuel into the high pressure compression chamber 2, and the high pressure compression chamber is a high pressure conduit ( It is connected to the injection valve 5 which entered the combustion chamber of the internal combustion engine which wants to supply fuel through 3), and the opening / closing motion of the injection valve 5 is connected to the injection valve 5 from the high pressure conduit 3, respectively. It is controlled by the electronically controlled control valve 4 arrange | positioned.
상기의 고압펌프(1)의 주요구성은 도 2 의 도시와 같이 고압펌프하우징(6)에캠샤프트(7), 타펫(tappet) 어셈블리(8), 타펫스프링(10), 플런저(plunger)(11), 바렐(barrel)(9)로 이루어진다.The main configuration of the high pressure pump (1) is a camshaft (7), a tappet assembly (8), a tappet spring (10), a plunger (11) in the high pressure pump housing (6) as shown in FIG. ), A barrel (9).
그 조립시에 타펫어셈블리(8)가 조립되고, 버텀스프링시트(12)와 타펫스프링(10)이 삽입된 후에 플런저(11), 바렐이 조립된다.At the time of assembly, the tappet assembly 8 is assembled, and after the bottom spring sheet 12 and the tappet spring 10 are inserted, the plunger 11 and the barrel are assembled.
상기의 바렐 조립시에 타펫스프링이 고정되어 있지 않아 스프링력을 이기고 바렐(9)을 강제로 고압펌프하우징내(16)에 밀어넣어야 하며, 볼트가 체결될 때까지 바렐(9)를 고정시키는 힘이 유지되어야 하는 어려움이 있으며, 강제로 바렐(9)에 힘을 가하며 밀어넣기 때문에 바렐(9)이 수직방향으로 흔들릴 수 있으며, 이때 플런저면(22)과 바렐면(23), 고압펌프하우징 내벽(16)에 스크래치가 발생하는 문제가 있다.Since the tappet spring is not fixed at the time of assembling the barrel, the spring force must be overcome and the barrel 9 must be forcibly pushed into the high pressure pump housing 16. The force for fixing the barrel 9 until the bolt is tightened. This difficulty has to be maintained, and the force of the barrel (9) is pushed by force, the barrel (9) can be shaken in the vertical direction, at this time, the plunger surface 22 and barrel surface (23), the high-pressure pump housing inner wall There is a problem that scratches occur at (16).
또한 스프링력이 직접 바렐(9)에 전달되기 때문에 고압펌프하우징(6)에 바렐(9) 체결시에 과도한 조임토오크가 필요한 문제가 있다.In addition, since the spring force is directly transmitted to the barrel 9, there is a problem that excessive tightening torque is required when the barrel 9 is fastened to the high pressure pump housing 6.
축압식 연료분사시스템의 고압펌프에 있어서, 전기한 문제점을 해결하고저, 고압펌프하우징내에 타펫스프링을 조립시에 어퍼스프링시트를 이용하여 타펫스프링을 미리 고정시킨 후 바렐을 조립하게 하여 고압펌프의 조립성을 향상시킴에 본 발명의 목적이 있다.In the high pressure pump of the accumulator fuel injection system, the above problems are solved, and the assembly of the high pressure pump is made by fixing the tappet spring in advance by using the upper spring seat when assembling the tappet spring in the high pressure pump housing. It is an object of the present invention to improve the properties.
도 1 은 고압축압식 연료분사시스템의 구성도1 is a block diagram of a high pressure compression fuel injection system
도 2 는 종래 고압펌프의 단면도2 is a cross-sectional view of a conventional high pressure pump
도 3 은 본 발명 고압펌프의 단면도Figure 3 is a cross-sectional view of the high pressure pump of the present invention
도 4 는 본 발명 고압펌프 내부의 가이드슬롯 부분의 분리사시도Figure 4 is an exploded perspective view of the guide slot portion inside the high pressure pump of the present invention
도 5 는 본 발명 고압어퍼(Upper) 스프링시트의 단면도Figure 5 is a cross-sectional view of the present invention high pressure (Upper) spring sheet
도 6 은 본 발명 고압어퍼(Upper) 스프링시트가 고압펌프 하우징Figure 6 is the high pressure upper (Upper) spring seat of the present invention high pressure pump housing
도 7 은 본 발명 고압어퍼(Upper) 스프링시트가 고압펌프 하우징내에 삽입된Figure 7 is a high pressure upper (Upper) spring seat of the present invention is inserted into the high pressure pump housing
후 회전되어 고정된 상태의 평면도After rotating and being fixed
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
1 : 고압펌프 2 : 축압식(common rail)1: high pressure pump 2: common rail
3 : 고압도관 4 : 제어밸브3: high pressure conduit 4: control valve
5 : 분사밸브 6 : 고압펌프하우징5: injection valve 6: high pressure pump housing
7 : 캠샤프트 8 : 타펫(tappet) 어셈블리7: Camshaft 8: Tappet Assembly
9 : 바렐(barrel) 10 : 타펫스프링9: barrel 10: tappet spring
11 : 플런저(plunger) 12 : 버텀(bottom)스프링시트11: plunger 12: bottom spring seat
14 : 어퍼스프링시트 16 : 고압펌프 하우징 내부14: upper spring sheet 16: inside the high pressure pump housing
17 : 수직가이드슬롯 18 : 수평가이드슬롯17: vertical guide slot 18: horizontal guide slot
19 : 고정용돌기 20 : 회전용 슬롯19: fixing projection 20: slot for rotation
21 : 스프링 안착용 챔버21: spring seating chamber
이하, 본 발명의 실시예를 첨부도면에 의하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail by the accompanying drawings.
다기통 디젤엔진용 연료분사장치에 본 발명을 적용한 실시예를 도 3에서 보여준다.3 shows an embodiment in which the present invention is applied to a fuel injection device for a multi-cylinder diesel engine.
도 3 의 고압펌프 하우징내부(16) A부를 부분절단표시한 것이 도 4인데, 도 4에서 어퍼스프링시트(14)가 삽입될 수 있는 수직가이드 슬롯(17)이 서로 마주보는 위치에 2개 형성되어 있고, 어퍼스프링시트(14)가 회전되어 고정될 수 있는 수평가이드 슬롯(18)이 연통되게 형성되어 있다.4 is a partially cut-out display of the inner portion A of the high pressure pump housing 16 of FIG. 3, and two vertical guide slots 17 into which the upper spring sheet 14 can be inserted are formed at positions facing each other. The horizontal guide slot 18 is formed to communicate with the upper spring sheet 14 to be rotated and fixed.
어퍼스프링시트(14)의 형상은 도 4와 도 5 에 나타냈으며, 타펫스프링(10)을 고정시킬 수 있게 2개의 돌기(19)와 어퍼스프링시트(14)를 고압펌프하우징내부(16)에 삽입 후 회전시킬 수 있는 회전슬롯(20)과 타펫스프링(10)을 고정시켜주는 챔버(21)로 구성되어 있다.The shape of the upper spring sheet 14 is shown in FIGS. 4 and 5, and the two projections 19 and the upper spring sheet 14 are mounted on the high pressure pump housing 16 to fix the tappet spring 10. It is composed of a chamber 21 for fixing the rotary slot 20 and the tappet spring 10 that can be rotated after insertion.
고압펌프(1)의 구성은 도 3 과 같이 고압펌프하우징(6)에 캠샤프트(7)가 조립되고, 타펫어셈블리(8)가 위에서 아래로 고압펌프하우징 내부(16)로 조립된 후 버텀스프링시트(12)가 올려지고, 도 6 과 같이 어퍼스프링시트(14)가 고압펌프하우징내부(16)에 형성되어 있는 2개의 수직가이드 슬롯(17)을 따라 삽입된 후 도 7과 같이 회전슬롯(20)을 이용하여 회전 치구로 수직가이드 슬롯(17) 밑으로 수직가이드슬롯(17)과 직각으로 연통되어 있는 수평가이드 슬롯(18)으로 회전되어 어퍼스프링시트(14)에 형성되어 있는 2개의 돌기(19)에 의해 어퍼스프링스트(14)가 고정됨과 동시에 타펫스프링(10)이 고정된다.The configuration of the high pressure pump (1) is a camshaft (7) is assembled to the high pressure pump housing (6) as shown in Figure 3, the tappet assembly (8) is assembled from the top of the high pressure pump housing in the bottom (16) after the bottom spring The seat 12 is lifted up, and the upper spring seat 14 is inserted along the two vertical guide slots 17 formed in the high pressure pump housing inner portion 16 as shown in FIG. Two projections formed on the upper spring sheet 14 by rotating the horizontal guide slot 18 perpendicular to the vertical guide slot 17 under the vertical guide slot 17 using a rotation jig. By the 19, the upper spring 14 is fixed, and at the same time, the tappet spring 10 is fixed.
이때 어퍼스프링시트(14)의 이탈을 방지하기 위해 수직가이드슬롯(17)과 수평가이드슬롯(18)이 만나는 2개의 위치중에서 고압펌프(1) 정면방향에 형성되어 있는 볼트 취부자리(15)에 볼트를 체결하여 어퍼스프링시트(14)의 이탈을 방지한다.At this time, in order to prevent separation of the upper spring seat 14, the bolt mounting seat 15 formed in the front direction of the high-pressure pump 1 among two positions where the vertical guide slot 17 and the horizontal guide slot 18 meet. The bolt is fastened to prevent separation of the upper spring sheet 14.
어퍼스프링시트(12)가 조립된 후 플런저(11)가 조립되고 바렐(9)이 볼트로 체결된다.After the upper spring sheet 12 is assembled, the plunger 11 is assembled and the barrel 9 is fastened with bolts.
본 발명의 고압펌프는 고압펌프하우징 내벽에 수직 가이드 슬롯과 수평가이드슬롯이 형성되어 어퍼스프링시트로 하여금 타펫스프링을 고정함으로써 바렐 조립시에 추가로 힘을 가할 필요가 없어지고, 바렐 체결시 플런저면과 바렐면, 고압펌프하우징내벽에 발생하는 스크래치 문제도 해결된다.In the high pressure pump of the present invention, the vertical guide slot and the horizontal guide slot are formed on the inner wall of the high pressure pump housing so that the upper spring seat does not need to apply additional force during barrel assembly, and the plunger face when the barrel is fastened. If scratched on the inner wall of the high pressure pump housing is also solved.
또한 스프링력이 직접 바렐(9)에 전달되는 것을 방지할 수 있어 내구성 향상과 함께 고압펌프하우징(6)에 바렐(9)을 체결할 때 과도하게 조임토오크를 주지 않아도 되는 효과가 있다.In addition, the spring force can be prevented from being directly transmitted to the barrel 9, thereby improving durability, and when tightening the barrel 9 to the high pressure pump housing 6, there is an effect of not excessively tightening torque.
Claims (2)
Priority Applications (1)
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KR1020000036466A KR20020004005A (en) | 2000-06-29 | 2000-06-29 | Conjunction structure of spring seat for high pressure pump of accumulating pressure type fuel injection system |
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KR1020000036466A KR20020004005A (en) | 2000-06-29 | 2000-06-29 | Conjunction structure of spring seat for high pressure pump of accumulating pressure type fuel injection system |
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KR20020004005A true KR20020004005A (en) | 2002-01-16 |
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- 2000-06-29 KR KR1020000036466A patent/KR20020004005A/en active IP Right Grant
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