KR19980035977A - Pressure maintaining mechanism of fuel distribution pipe - Google Patents
Pressure maintaining mechanism of fuel distribution pipe Download PDFInfo
- Publication number
- KR19980035977A KR19980035977A KR1019960054446A KR19960054446A KR19980035977A KR 19980035977 A KR19980035977 A KR 19980035977A KR 1019960054446 A KR1019960054446 A KR 1019960054446A KR 19960054446 A KR19960054446 A KR 19960054446A KR 19980035977 A KR19980035977 A KR 19980035977A
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- KR
- South Korea
- Prior art keywords
- fuel
- distribution pipe
- injector
- pressure
- check valve
- Prior art date
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- Fuel-Injection Apparatus (AREA)
Abstract
본 발명의 목적은 연료인젝터의 연료분사유량 특성을 균일하게 유지하도록 하는 연료분배파이프의 압력유지기구를 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure holding mechanism of a fuel distribution pipe for uniformly maintaining fuel injection flow rate characteristics of a fuel injector.
상기한 목적을 달성하기 위한 본 발명은The present invention for achieving the above object
연료 펌프로부터 급송되어 온 연료를 각 인젝터(2)에 분배하며 잔류 연료량이 증가하여 기준치 이상으로 압력이 증가하면 체크밸브(6)를 통해 연료탱크로 연료를 귀환시키게 되는 연료분배 파이프(1)에 있어서,The fuel supplied from the fuel pump is distributed to each injector 2, and when the residual fuel amount increases and the pressure increases above the reference value, the fuel distribution pipe 1 returns the fuel to the fuel tank through the check valve 6. In
상기 연료분배 파이프(1)의 단부에는 인젝터(2)를 통해 분사되고 남는 잔류연료량이 증가하여 내부압이 높아질 때 이를 수용하여 내부압을 일정하게 유지시켜주는 고무튜브(7)가 마련되어 있는 것을 특징으로 한다.At the end of the fuel distribution pipe (1) is provided with a rubber tube (7) which is injected through the injector (2) and the remaining residual fuel amount is increased to accommodate when the internal pressure is increased to maintain the internal pressure constant It is done.
Description
본 발명은 실린더에 연료를 분사하는 각 인젝터로 연료를 분배하는 연료분배 파이프의 압력유지기구에 관한 것이다.The present invention relates to a pressure holding mechanism of a fuel distribution pipe for distributing fuel to each injector for injecting fuel into a cylinder.
종래 연료펌프에 의해 고압으로 급송되는 연료는 도 2 에 도시하는 것과같이 연료분배 파이프(1, Feul delivery pipe)에 의해 각 실린더헤드에 장착된 인젝터(2)로 분배하여 연소실에 분사되어지고 있다.The fuel fed at a high pressure by the conventional fuel pump is distributed to the injector 2 mounted to each cylinder head by a fuel delivery pipe 1, as shown in FIG. 2, and injected into the combustion chamber.
그런데 연료펌프(플런저 펌프)에 의해 고압으로 압송되어 온 연료는 통상 인젝터(2)의 유량보다 많기 때문에 연료분배 파이프(1)내의 연료잔류량이 많아져 유압이 규정치 이상 상승하면 볼(4)이 스프링(5)을 압축하면서 후퇴하여 체크밸브(6)가 열리므로써 리턴파이프(3)를 통해 여분의 연료가 연료탱크로 귀환하여 연료압을 낮추게 된다.However, since the fuel pressurized to a high pressure by the fuel pump (plunger pump) is usually larger than the flow rate of the injector 2, the amount of fuel remaining in the fuel distribution pipe 1 increases, and when the hydraulic pressure rises above the prescribed value, the ball 4 springs. By retracting (5) and opening the check valve 6, the excess fuel is returned to the fuel tank through the return pipe 3 to lower the fuel pressure.
그러나 상기한 체크밸브(6)는 연료분배 파이프(1)내의 유압이 일정치 이상 증가시에만 개방되기 때문에 각 인젝터(2)를 통한 연료분사시 발생하는 연료분배 파이프(1)내의 유압변동 및 연료잔유량에 의해 점차 증가(체크밸브가 열리기 직전까지)하는 유압에 의해 인젝터(2)의 분사유량이 불규칙해지게 되므로써 엔진출력이 불안정해지고 진동이 심화되고 연비가 악화되는 문제점이 있었다.However, the above-mentioned check valve 6 is opened only when the oil pressure in the fuel distribution pipe 1 increases only by a certain value or more, so that the hydraulic fluctuations and fuel in the fuel distribution pipe 1 generated during the fuel injection through each injector 2 are caused. As the injection flow rate of the injector 2 becomes irregular due to the hydraulic pressure gradually increasing (up to just before the check valve is opened) due to the residual flow rate, the engine output is unstable, the vibration is intensified, and the fuel economy is deteriorated.
이에 본 발명은 상기한 목적을 감안하여 제안된 것으로서 그의 목적으로 하는바는 연료인젝터의 연료분사유량 특성을 균일하게 유지하도록 하는 연료분배파이프의 압력유지기구를 제공하는데 있다.Accordingly, the present invention has been proposed in view of the above object, and an object thereof is to provide a pressure maintaining mechanism of a fuel distribution pipe for uniformly maintaining fuel injection flow rate characteristics of a fuel injector.
본 발명은 상기한 목적을 달성하기 위하여The present invention to achieve the above object
연료 펌프로부터 급송되어 온 연료를 각 인젝터에 분배하며 잔류 연료량이 증가하여 기준치 이상으로 압력이 증가하면 체크밸브를 통해 연료탱크로 연료를 귀환시키게 되는 연료분배 파이프에 있어서,In the fuel distribution pipe that distributes the fuel supplied from the fuel pump to each injector and the fuel is returned to the fuel tank through the check valve when the residual fuel amount increases and the pressure increases above the reference value,
상기 연료파이프의 단부에는 인젝터를 통해 분사되고 남는 잔류연료량이 증가하여 내부압이 높아질 때 이를 수용하여 내부압을 일정하게 유지시켜주는 고무튜브가 마련되어 있는 것을 특징으로 한다.At the end of the fuel pipe is characterized in that the rubber tube which is injected through the injector and the remaining amount of residual fuel is increased to accommodate when the internal pressure is increased to maintain the internal pressure constant.
도 1 은 본 발명에 의한 연료분배 파이프의 압력유지기구를 나타내는 도면1 is a view showing a pressure maintaining mechanism of a fuel distribution pipe according to the present invention.
도 2 는 종래기술2 is a prior art
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
1 : 연료분배 파이프 2 : 인젝터1: fuel distribution pipe 2: injector
3 : 리턴파이프 4 : 볼3: return pipe 4: ball
5 : 스프링 6 : 체크밸브5: spring 6: check valve
7 : 고무튜브 8 : 하우징7: rubber tube 8: housing
이하 본 발명의 구성과 작용을 첨부한 도면을 참조하여 설명한다.Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.
도 1 은 본 발명에 의한 연료분배 파이프의 압력유지기구를 나타내는 도면으로 도면중 부호 1은 연료펌프로부터 고압으로 급송된 연료를 각 실린더 헤드에 장착된 인젝터(2)로 분배하는 연료분배 파이프이다.1 is a view showing a pressure holding mechanism of a fuel distribution pipe according to the present invention, in which 1 is a fuel distribution pipe for distributing fuel fed at high pressure from a fuel pump to an injector 2 mounted to each cylinder head.
상기 연료분배 파이프(1)의 단부에는 연료탱크로 연료를 리턴시키는 리턴파이프(3)가 접속되어 있으며 리턴파이프(3)의 접속부위에는 볼(4)과 스프링(5)으로구성된 체크밸브(6)가 설치되어 있어 연료분배 파이프(1)내의 압력이 일정치 이상으로 높아지게 되면 체크밸브(6)가 열려 여분의 연료를 연료탱크로 되돌리게 된다.A return pipe 3 for returning fuel to the fuel tank is connected to an end of the fuel distribution pipe 1, and a check valve 6 composed of a ball 4 and a spring 5 is connected to the return pipe 3. Is installed, and the pressure in the fuel distribution pipe 1 rises above a certain value, the check valve 6 opens to return the excess fuel to the fuel tank.
그리고 체크밸브(6)가 설치된 일측으로 연료분배 파이프(1)의 끝단에는 연료를 수용하여 팽창하는 고무튜브(7)가 접속되며 고무튜브(7)는 하우징(8)내에 수용되어 보호되므로 고무튜브(7)는 하우징(8)공간 범위내에서 팽창하게 되므로써 터지거나 하는일은 없게된다.In addition, a rubber tube 7 which receives and expands fuel is connected to one end of the fuel distribution pipe 1 connected to one side of the check valve 6, and the rubber tube 7 is housed in the housing 8 to be protected. The 7 is expanded within the space of the housing 8 so that it does not burst or break.
이와같은 본 발명은 인젝터(2)에 공급되고 남은 연료량에 의해 연료분배 파이프(1)의 내부압이 증가하게 되면 고무튜브(7)가 팽창되어 여분의 연료를 수용하게 되므로써 연료분배 파이프(1) 내부압은 일정하게 유지되며 고무튜브(7)가 하우징(8) 공간내에서 최대로 팽창되어 고무튜브(7)의 장력이 체크밸브(6)의 스프링(5) 장력보다 커지게되면 그때서야 체크밸브(6)가 열려 여분의 연료을 리턴시켜 배출하게 되는 것이다.In the present invention as described above, when the internal pressure of the fuel distribution pipe 1 is increased by the amount of remaining fuel supplied to the injector 2, the rubber tube 7 is expanded to accommodate the extra fuel, thereby distributing the fuel distribution pipe 1 The internal pressure is kept constant and is checked only when the rubber tube 7 is fully inflated in the housing 8 space such that the tension of the rubber tube 7 becomes greater than the tension of the spring 5 of the check valve 6. The valve 6 is opened to return the excess fuel to be discharged.
이상과 같은 본 발명은 팽창에 의해 여분의 연료을 수용하게 되는 고무튜브와 체크밸브의 스프링 장력의 상호 견제에 의해 연료분배 파이프내의 유압을 항상 일정하게 유지하게 되므로써 인젝터를 통한 분사유량이 안정되어 엔진의 정숙운전이 가능하고 연비의 향상 및 출력안정을 도모할 수 있는 효과가 있다.According to the present invention as described above, the hydraulic pressure in the fuel distribution pipe is constantly maintained by the mutual check of the spring tension of the rubber tube and the check valve that receives the excess fuel by expansion, so that the injection flow rate through the injector is stabilized. Quiet operation is possible, and it has the effect of improving fuel economy and output stability.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960054446A KR19980035977A (en) | 1996-11-15 | 1996-11-15 | Pressure maintaining mechanism of fuel distribution pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960054446A KR19980035977A (en) | 1996-11-15 | 1996-11-15 | Pressure maintaining mechanism of fuel distribution pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19980035977A true KR19980035977A (en) | 1998-08-05 |
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ID=66320577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960054446A KR19980035977A (en) | 1996-11-15 | 1996-11-15 | Pressure maintaining mechanism of fuel distribution pipe |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19980035977A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100435719B1 (en) * | 2001-06-18 | 2004-06-12 | 현대자동차주식회사 | over flow valve structure for diesel engine |
| KR100975497B1 (en) * | 2008-07-23 | 2010-08-11 | 박표준 | Filter case |
-
1996
- 1996-11-15 KR KR1019960054446A patent/KR19980035977A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100435719B1 (en) * | 2001-06-18 | 2004-06-12 | 현대자동차주식회사 | over flow valve structure for diesel engine |
| KR100975497B1 (en) * | 2008-07-23 | 2010-08-11 | 박표준 | Filter case |
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