KR820002578Y1 - Fuel injector for internal combustion engines - Google Patents
Fuel injector for internal combustion engines Download PDFInfo
- Publication number
- KR820002578Y1 KR820002578Y1 KR2019820008339U KR820008339U KR820002578Y1 KR 820002578 Y1 KR820002578 Y1 KR 820002578Y1 KR 2019820008339 U KR2019820008339 U KR 2019820008339U KR 820008339 U KR820008339 U KR 820008339U KR 820002578 Y1 KR820002578 Y1 KR 820002578Y1
- Authority
- KR
- South Korea
- Prior art keywords
- nozzle
- valve seat
- internal combustion
- fuel injector
- fuel
- Prior art date
Links
Classifications
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- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
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- 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
Abstract
내용 없음.No content.
Description
도면은 본 고안에 따른 분사기의 하부를 도시한 종단면도.Figure is a longitudinal sectional view showing the lower part of the injector according to the present invention.
본 고안은 축방향으로 미끄러질 수 있으며 하나 또는 다수의 스프링력에 대항하여 연료 압력에 의해 밸브 시이트로부터 상승할 수 있는 노즐 니들을 가진 내연기관용 연료분사기에 관한 것으로서, 상기 노즐 니들은 시이트 아래에 뾰족한 선단(pointed tip)을 형성하고 있으며 적어도 하나의 분사구가 노즐 몸체내에 마련되어 노즐축에 예각으로 배치된다.The invention relates to a fuel injector for an internal combustion engine having a nozzle needle that can slide in an axial direction and rise from the valve seat by fuel pressure against one or multiple spring forces, the nozzle needle having a pointed tip beneath the sheet. A pointed tip is formed and at least one nozzle is provided in the nozzle body and disposed at an acute angle to the nozzle shaft.
이러한 형태의 분사기는 이미 영국 특허 제565299호에 의해 발표되었다. 그 분사기에서는 밸브 시이트 아래에 연료집적 공간(fuel collecting space)이 마련되어 있고, 폐쇄된 위치에서, 노즐 니들의 뾰족한 선단은 그 연료 집적공간을 관통하여, 계단식 직경들을 갖고 길이 및 직경과 관련하여 이들을 정확히 한정하는 분사구에 도달한다.This type of injector has already been published by British Patent 556599. The injector has a fuel collecting space under the valve seat, and in the closed position the pointed tip of the nozzle needle penetrates the fuel accumulating space, having stepped diameters and precisely relating them to length and diameter. Reach the limiting nozzle.
내연기관에서 연료분사의 질은 실질적으로 효과적인 분사압력에 달려있다는 것은 공지의 사실이다. 만약, 상기에 설명된 분사기에서, 노즐 니들이 약간만 들어 올려지면, 첫째로 밸브 시이트의 좁은 틈새에 의해 연료의 압력이 현저히 감소될 것이고, 둘째로 모든 분사구들의 전체 면적이 즉시 개방될 것이다. 이것은 특히 노즐 니들의 개방 및 폐쇄상태 동안, 분사를 위해 크게 감소될 압력이 분사구에서만 사용되어지는 상태에 도달하게 된다. 그 결과 혼합 및 연소가 충분치 못하여 배기 가스의 양을 감소시키고 연료소비의 증가를 초래하게 된다. 이것은 특히 기관의 저속 및 저부하 범위에 적용되며, 노즐 니들의 개방 및 폐쇄상태동안 대부분 또는 완전한 분사과정이 이루어진 곳에서도 발생한다.It is well known that the quality of fuel injection in internal combustion engines depends substantially on the effective injection pressure. In the injector described above, if the nozzle needle is only slightly lifted, firstly the pressure of the fuel will be significantly reduced by the narrow gap in the valve seat, and secondly the entire area of all the injectors will immediately open. This leads to a state where the pressure to be greatly reduced for injection is used only in the injection port, especially during the open and closed states of the nozzle needle. The result is inadequate mixing and combustion, which reduces the amount of exhaust gases and results in increased fuel consumption. This applies especially to the low speed and low load ranges of the engine and occurs even where most or complete injection processes have been made during the open and closed state of the nozzle needle.
간단한 장치에 의해, 어떤 추가적인 경비가들지 않고, 연료 압력이 전분사 과정에 걸쳐서 실질적으로 감소되지 않고 사용되도록 초기에 설명된 형태의 연료 분사기를 개량하는 것이 본 고안의 목적이며 시발점이다.It is an object and starting point of the present invention to improve the fuel injector of the type described earlier so that by means of a simple device there is no additional expense and the fuel pressure is not substantially reduced throughout the preinjection process.
본 고안에 따라서, 이 목적은 분사구의 자유횡 단면적이 노즐 니들의 모든 위치에서의 밸브 시이트의 자유 횡단면적보다 적게 되도록 분사구속으로 관통하여 형성된 노즐 니들의 선단을 가짐으로서 성취되었다.According to the present invention, this object has been achieved by having the tip of the nozzle needle formed penetrating into the injection port such that the free cross-sectional area of the injection port is less than the free cross-sectional area of the valve seat at all positions of the nozzle needle.
다시 말하면, 밸브시이트 에서의 자유면적을 조절함과 동시에 분사구에서의 자유면적의 조절이 간단한 방법으로 이루어진다. 노즐 니들이 밸브시이트로 부터 약간만 올려졌을 때, 전체 분사압력이 분사구의 앞에서 발생할 가능성이 있으므로, 요구되는 효과적인 혼합물 형성과 연소가 기관의 전작동 범위, 특히 최저속도 및 그 부하범위에서 보장된다.In other words, while controlling the free area at the valve seat, the free area at the injection port is controlled in a simple manner. When the nozzle needle is only slightly raised from the valve seat, the total injection pressure is likely to occur in front of the injection port, so that the required effective mixture formation and combustion is ensured in the engine's full operating range, in particular the minimum speed and its load range.
본 고안의 또 다른 특징에 따라서, 노즐 축과 분사구 사이의 각도가 노즐 니들의 선단과 노즐 축 사이의 각도와 같다는 것이 알려졌다. 이것은 니들이 상승하므로서 변화하는 면적이 최소변화를 일으킬 수 있음을 알 수 있게 한다.According to another feature of the invention, it is known that the angle between the nozzle axis and the nozzle is equal to the angle between the tip of the nozzle needle and the nozzle axis. This makes it known that the area that changes as the needle rises can cause minimal change.
노즐 니들이 완전히개 방되어서 그선단이 분사구 속으로 더 이상 뻗어있지 않을 때에도, 분사구에서의 자유면적이 밸브 시이트에서의 자유면적보 다 작게 된다.Even when the nozzle needle is fully open so that its tip no longer extends into the injection port, the free area at the injection port is smaller than the free area at the valve seat.
본 고안을 상세히 하기 위해, 도면에 도시된 대표적인 실시예를 참조하여 설명이 주어질 것이다. 노즐몸체(1) 속에는 축방향으로 미끄러질 수 있도록 된 노즐 니들(2)이 있으며, 이 노즐 니들(2)은 원추표면(3)을 갖고, 노즐몸체(1) 속에서 원추표면(3)과 유사하게 형성된 밸브시이트(4)와 접촉하고 있다. 밸브시이트(4) 아래에는, 연료집적 공간(5)이 있고, 거기로부터 분사구(6)가 외측으로 연장된 노즐축(x)에 대해 예각(α)으로 배치되어 있다. 밸브시이트(4)와 접촉하는 노즐 니들(2)의 원추표면(3)은 분사구속으로 관통하여 노즐니들이 들어 올려지도록 분사구의 자유 횡단면적을 조절하는 뾰족한 선단(7)을 형성하기 위해 연장되어 진다. 도면에 도시된바와 같이, 원추표면(3)과 함께 선단(7)의 외부표면은 분사구(6)와 같은 각도(α)로 경사지게 원추를 제조하도록 용이하게 형성되어 있다. 이것과 관련하여 선단(7)의 경사 즉, 노즐축(x)에 대한 분사구(6)의 경사는 원추표면(3) 또는 밸브시이트(4)의 경사와 반드시 일치시킬 필요가 없다는 것이 언급될 수 있다.In order to elaborate on the present invention, a description will be given with reference to exemplary embodiments shown in the drawings. In the nozzle body 1 there is a nozzle needle 2 which is able to slide in the axial direction, which has a conical surface 3, which is similar to the conical surface 3 in the nozzle body 1. The valve seat 4 is formed. Under the valve seat 4, there is a fuel accumulation space 5, from which the injection port 6 is arranged at an acute angle α with respect to the nozzle shaft x extending outward. The conical surface 3 of the nozzle needle 2 in contact with the valve seat 4 extends to form a pointed tip 7 that penetrates into the injection port and adjusts the free cross-sectional area of the injection port to lift the nozzle needle. . As shown in the figure, the outer surface of the tip 7 together with the conical surface 3 is easily formed to make the cone inclined at the same angle α as the injection hole 6. In this connection it can be mentioned that the inclination of the tip 7, ie the inclination of the injection hole 6 with respect to the nozzle axis x, does not necessarily coincide with the inclination of the conical surface 3 or the valve seat 4. have.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019820008339U KR820002578Y1 (en) | 1978-12-15 | 1978-12-15 | Fuel injector for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019820008339U KR820002578Y1 (en) | 1978-12-15 | 1978-12-15 | Fuel injector for internal combustion engines |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019780003765 Division | 1978-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR820002578Y1 true KR820002578Y1 (en) | 1982-12-13 |
Family
ID=19227225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019820008339U KR820002578Y1 (en) | 1978-12-15 | 1978-12-15 | Fuel injector for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR820002578Y1 (en) |
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1978
- 1978-12-15 KR KR2019820008339U patent/KR820002578Y1/en active
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