KR200227358Y1 - Direct injection device of diesel engine - Google Patents
Direct injection device of diesel engine Download PDFInfo
- Publication number
- KR200227358Y1 KR200227358Y1 KR2019970031257U KR19970031257U KR200227358Y1 KR 200227358 Y1 KR200227358 Y1 KR 200227358Y1 KR 2019970031257 U KR2019970031257 U KR 2019970031257U KR 19970031257 U KR19970031257 U KR 19970031257U KR 200227358 Y1 KR200227358 Y1 KR 200227358Y1
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- South Korea
- Prior art keywords
- injection
- combustion chamber
- fuel
- direct injection
- engine
- 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
- 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
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
본 고안은 연소실로 연료를 분사할 때에 직접 분사를 하는 구멍형 분사노즐을 가지고 있는 디젤 엔진의 직접 분사 장치에 관한 것으로서, 니이들밸브(12)의 돌출부위의 하단부와 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 연소실까지 관통된 제 1 차 분사구멍(21)과, 상기 니이들밸브(12)의 돌출부분과 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 연소실까지 관통된 제 2 차 분사구멍(22)으로 구성된 것을 특징으로 하는 디젤 엔진의 직접 분사 장치를 이용함으로써, 순차적인 연료 분사를 하게 됨으로 착화지연기간 중에 분사되는 연료를 줄이게 되고, 급격한 압력변화를 방지함으로 엔진의 노킹 현상을 감소하여 엔진의 성능을 향상시킨 효과를 가지게 된다.The present invention relates to a direct injection device of a diesel engine having a bore injection nozzle for direct injection when fuel is injected into the combustion chamber, the lower end of the protruding portion of the needle valve 12 and the nozzle body 11 in contact with A hole is formed from the first injection hole 21 penetrating the combustion chamber to the combustion chamber and the surface of the needle valve 12 protruding portion and the surface contacting the nozzle body 11 to penetrate the combustion chamber. By using the direct injection device of the diesel engine, characterized in that the secondary injection holes 22, by sequential fuel injection to reduce the fuel injected during the ignition delay period, to prevent the sudden pressure change of the engine It has an effect of improving the performance of the engine by reducing the knocking phenomenon.
Description
본 고안은 디젤 엔진의 직접 분사 장치에 관한 것으로서, 보다 상세하게는 연료를 분사할 때에 순차적으로 분사되게 하여 엔진의 성능을 향상시키게 하는 디젤 엔진의 직접 분사 장치에 관한 것이다.The present invention relates to a direct injection device for a diesel engine, and more particularly, to a direct injection device for a diesel engine to be sequentially injected when injecting fuel to improve the performance of the engine.
일반적으로, 디젤 엔진의 분사노즐은 분사펌프로부터 송압된 고압의 연료를 미세한 안개 모양으로 연소실 내에 분사하는 일을 한다. 분사노즐도 여려 형태가 있어나 크게 구멍형(HOLE TYPE), 핀틀형(PINTLE TYPE), 스로틀형(THROTTLE TYPE)이 많이 사용되며 특히, 구멍형은 분사압력이 높은 직접 분사식의 엔진에 주로 사용되며, 상기 구멍형의 작동 원리는 제1도 및 제2도에서 보는 바와 같이 니이들밸브(12)의 앞 끝이 원뿔형으로 되어 있고, 또한, 구멍은 볼록하게 된 노즐보디(11)의 앞끝에 노즐 중심선에 대해 대칭으로 일정한 각도를 두고 복수개의 분사구멍이 뚫어져 있다.Generally, the injection nozzle of a diesel engine injects the high pressure fuel sent from the injection pump into a combustion chamber in the shape of a fine mist. There are many types of injection nozzles, but the hole type, pintle type, and throttle type are used a lot. Especially, the hole type is mainly used for the direct injection type engine with high injection pressure. The operating principle of the hole type is that the front end of the needle valve 12 is conical, as shown in FIGS. 1 and 2, and the hole is located at the front end of the convex nozzle body 11. A plurality of injection holes are drilled at an angle symmetrically with respect to the center line.
구멍은 연소에 가장 알맞는 연료의 분포가 얻어지도록 어떤 분공각을 두고, 뚫어져 있으며 구멍의 수와 직경은 분무 입자의 크기와 분무의 도달 거리에 적합하게 되어 있다. 상기 구멍형 분사노즐은 분사압력이 높기 때문에 무화가 좋고, 엔진의 기동이 쉬우며, 연료가 완전 연소될 수 있어 연료소비량이 적은 장점을 가지고 있다.The holes are drilled with some pore angle to obtain the most appropriate fuel distribution for combustion, and the number and diameter of the holes are adapted to the size of the spray particles and the spraying reach. The hole-type injection nozzle has an advantage of good atomization because of the high injection pressure, easy starting of the engine, the fuel can be completely burned, the fuel consumption is low.
그러나, 종래의 분사노즐은 니이들밸브(12)가 열려 연료가 분사될 때에는 동일한 복수개(보통은 네 개임)의 동시 분사구멍(13)을 통하여 여러 방향으로 동시에 열려서 연료가 분출되므로 엔진의 초기 시동시에 문제가 된다.However, in the conventional injection nozzles, when the needle valve 12 is opened and fuel is injected, the engine is first ejected by simultaneously opening the needle valve 12 in multiple directions through the same plural (usually four) simultaneous injection holes 13. This is a problem for the city.
즉, 엔진의 초기 시동시에는 제 1 단계로 미소한 연료에 의해서 1 차로 연료가 발화되고, 일정한 착화지연시간후에 다량의 연료가 연소되어야 엔진의 성능이 향상된다. 급격한 고압 분사에 의해 다량의 연료가 동시에 분사가 되므로 엔진의 노킹 현상이 일어나고, 연료의 소모도 많게 되는 문제점이 있었다.That is, during initial start-up of the engine, fuel is first fired by the minute fuel in the first stage, and a large amount of fuel is combusted after a constant ignition delay time to improve the engine performance. Since a large amount of fuel is injected at the same time by rapid high-pressure injection, knocking of the engine occurs, and there is a problem in that fuel consumption is increased.
본 고안은 상기한 문제점을 해결하기 위해 안출된 것으로서, 연료를 분사할 때에 순차적으로 분사되게 하여 엔진의 성능을 향상시키는 장치를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, the object of the present invention is to provide a device for improving the performance of the engine to be sequentially injected when injecting fuel.
또한, 본 고안의 디젤 엔진의 직접 분사 장치는 연소실로 연료를 분사할 때에 직접 분사를 하는 니이들 밸브와 다수개의 분사구멍이 형성되는 노즐 보디를 포함하는 엔진의 직접 분사 장치에 있어서, 상기 니이들밸브는 하단면에서 일정 길이로 돌출부가 형성되고, 상기 니이들밸브의 하단면과 접촉되는 노즐 보디의 표면으로부터 연소실까지 관통되는 다수개로 제 1 차 분사구멍이 형성되고, 상기 니이들밸브의 돌출부와 노즐보디와 접촉되는 표면으로부터 연소실까지 관통되는 다수개의 제 2 차 분사구멍이 형성되어짐을 특징으로 한다.In addition, the direct injection device of the diesel engine of the present invention is a direct injection device of an engine including a needle valve for direct injection when injecting fuel into a combustion chamber and a nozzle body having a plurality of injection holes, wherein the needle The valve has a protruding portion formed at a predetermined length from a lower end surface, a plurality of first injection holes penetrating from the surface of the nozzle body in contact with the lower end surface of the needle valve to the combustion chamber, and the protruding portion of the needle valve. And a plurality of secondary injection holes penetrating from the surface in contact with the nozzle body to the combustion chamber.
제1도는 디젤 엔진에 이용되는 분사노즐에 관한 단면도.1 is a cross-sectional view of an injection nozzle used in a diesel engine.
제2도는 제1도의 A 부분의 종래 기술의 상세 단면도.2 is a detailed cross-sectional view of the prior art of the portion A of FIG.
제3도는 제1도의 A 부분의 본 고안의 상세 단면도.3 is a detailed cross-sectional view of the present invention of part A of FIG.
제4(a)도는 본 고안의 제 1 단계 연료분사에 관한 도면.4 (a) is a view of the first stage fuel injection of the present invention.
제4(b)도는 본 고안의 제 2 단계 연료분사에 관한 도면이다.4 (b) is a view related to the second stage fuel injection of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 노즐보디 12 : 니이들밸브11: nozzle body 12: needle valve
13 : 동시 분사구멍 14 : 노즐스프링13 simultaneous injection hole 14 nozzle spring
15 : 노즐호울더 21 : 제 1 차 분사구멍15 nozzle nozzle 21 primary injection hole
22 : 제 2 차 분사구멍22: second injection hole
상기한 과제를 실현하기 위한 본 고안의 디젤 엔진의 직접 분사 장치에 관하여 첨부된 도면을 참조하여 본 고안의 구성 및 실시예를 설명하면 다음과 같다.With reference to the accompanying drawings with respect to the direct injection device of the diesel engine of the present invention for realizing the above object will be described the configuration and embodiment of the present invention as follows.
연소실로 연료를 분사할 때에 직접 분사를 하는 종래의 구멍형 분사노즐을 가지고 있는 디젤 엔진에 있어서, 제3도와 제4(a)도 및 제4(b)도에 나타낸 바와 같이 본 고안은 니이들밸브(12)의 하단면과 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 연소실까지 관통된 제 1 차 분사구멍(21)과, 상기 니이들밸브(12)의 돌출부와 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 연소실까지 관통된, 제 2 차 분사구멍(22)으로 구성되어 있다.In a diesel engine having a conventional bore injection nozzle that directly injects fuel when injecting fuel into a combustion chamber, the present invention has a needle as shown in FIGS. 3, 4 (a) and 4 (b). Primary injection holes 21 penetrated to the combustion chamber by forming a hole from the bottom surface of the valve 12 and the surface in contact with the nozzle body 11, the projection of the needle valve 12 and the nozzle body 11 The secondary injection hole 22 is formed from a surface in contact with the s) and penetrates to the combustion chamber.
또한, 상기 제 1 차 분사구멍(21)과 제 2 차 분사구멍(22)은 각각 대칭형으로 정렬된 한 쌍식을 가진 네 개의 분사구멍을 가진 것으로 되어 있다.In addition, the primary injection hole 21 and the secondary injection hole 22 each have four injection holes having a pair of symmetrically aligned pairs.
상기와 같이 구성되는 본 고안에 따른 디젤 엔진의 직접 분사 장치의 작용을 제3도와 제4(a)도 및 제4(b)도에 나타낸 바와 같이 설명하면 다음과 같다.Referring to the operation of the direct injection device of the diesel engine according to the present invention configured as described above as shown in Figure 3 and 4 (a) and 4 (b) is as follows.
고압의 연료가 노즐보디(11)로 공급되어 니이들밸브(12)가 열리면 니이들밸브(12)의 돌출부위의 하단부와 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 동일한 직경으로 연소실까지 관통된 제 1 차 분사구멍(21)을 통하여 제 1 단계로 상향 조정된 구멍에서 연료가 분사되어 연소실의 연료가 발화되면서 착화지연 기간을 가지게 되면, 다음 단계에서는 상기 니이들밸브(12)가 완전하게 열리면서 마지막 남은 니이들밸브(12)의 돌출부분과 노즐보디(11)와 접촉되는 표면으로부터 구멍을 형성하여 동일한 직경으로 연소실까지 관통된 제 2 차 분사구멍(22)을 통하여 연료의 전부가 분사된다.When the high pressure fuel is supplied to the nozzle body 11 and the needle valve 12 is opened, holes are formed from the lower end of the protruding portion of the needle valve 12 and the surface contacting the nozzle body 11 to the combustion chamber with the same diameter. When the fuel is injected from the hole upwardly adjusted to the first stage through the first injection hole 21 penetrated to have the ignition delay period as the fuel in the combustion chamber is ignited, the needle valve 12 is Completely opened, all of the fuel is passed through the second injection hole 22 through which the hole is formed from the protruding portion of the last remaining needle valve 12 and the surface contacting the nozzle body 11 to the combustion chamber with the same diameter. Sprayed.
결론적으로, 종래에서 착화지연기간 중에 분사한 연료는 본 고안을 통하여 줄이게 되었고, 또한, 동시에 많은 연료가 엔진의 초기 시동시에 분사되지 않음으로 엔진의 노킹 현상도 방지하여 엔진의 성능을 향상시키게 되었다.In conclusion, conventionally, fuel injected during the ignition delay period is reduced through the present invention, and at the same time, many engines are not injected at the initial start of the engine, thereby preventing engine knocking and improving engine performance. .
상기와 같이 구성되고 작용하는 본 고안에 의한 디젤 엔진의 직접 분사 장치는 순차적인 연료 분사를 하게 됨으로 착화지연기간 중에 분사되는 연료를 줄이게되고, 급격한 압력변화를 방지함으로 엔진의 노킹 현상을 감소하여 엔진의 성능을 향상시킨 효과를 가지게 된다.The direct injection device of the diesel engine according to the present invention, which is constructed and operated as described above, reduces the fuel injected during the ignition delay period by sequential fuel injection, and reduces the knocking phenomenon of the engine by preventing a sudden pressure change. It will have the effect of improving the performance.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970031257U KR200227358Y1 (en) | 1997-11-06 | 1997-11-06 | Direct injection device of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970031257U KR200227358Y1 (en) | 1997-11-06 | 1997-11-06 | Direct injection device of diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19990018069U KR19990018069U (en) | 1999-06-05 |
| KR200227358Y1 true KR200227358Y1 (en) | 2001-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019970031257U KR200227358Y1 (en) | 1997-11-06 | 1997-11-06 | Direct injection device of diesel engine |
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| Country | Link |
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| KR (1) | KR200227358Y1 (en) |
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1997
- 1997-11-06 KR KR2019970031257U patent/KR200227358Y1/en not_active IP Right Cessation
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| KR19990018069U (en) | 1999-06-05 |
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