摘要:
The present invention relates to a dual fuel injection valve having a pumping nozzle for a diesel engine and a gas engine, and an objective of the present invention is to provide a fuel injection valve in which, by using two kinds of fuel entering into a fuel valve, a warming up and injection of pilot fuel may be performed in an initial injection and injection of main fuel may be performed subsequently such that subsequent dual fuel is used for combustion, thereby increasing fuel injection performance. In a fuel injection valve for a diesel engine or a gas engine for injecting fuel to a cylinder, provided is a dual fuel injection valve having a pumping nozzle for the diesel engine and the gas engine including: the dual fuel injection valve including a fuel valve block (110) in which a fuel passage to which first and secondary fuel is introduced through a high pressure pipe is formed inside thereof, the first and secondary fuel being the same fuel system or different fuel systems; a cylinder/needle valve (506) which moves upward by a pressure difference of the secondary fuel introduced through the fuel passage formed in the fuel valve block (110) to inject the primary fuel to a pilot nozzle hole; and a main needle valve (143) which, after injecting the primary fuel by pressing the cylinder/needle valve (506), moves upward by the pressure difference of the secondary fuel introduced through a connected fuel passage to inject the primary fuel to a main nozzle hole (161).
摘要:
Disclosed herein is a two-stage fuel injection valve for a diesel engine. The valve includes a fuel valve block (110) having therein a passage (1701) into which fuel is supplied; a nozzle (140) having a low pressure nozzle hole (160) and a high pressure nozzle hole (161); a needle valve (130) differentially opening the low pressure nozzle hole and the high pressure nozzle; pressure booster spindles (141), (142) and (143) pressurizing the needle valve to boost pressure of low-load fuel; a shuttle valve (150) configured to supply a gauge pressure to the pressure booster spindles, thus raising the pressure of the fuel; a lifting bush valve (180) discharging fuel to a fuel discharge hole through a gap between the fuel discharge hole and a nozzle holder when a solenoid valve (201) is moved upwards; and the solenoid valve (201) controlling pressure applied to the lifting bush valve.
摘要:
The present invention provides a two solenoid valve relay with a two-phase fuel injection valve for a diesel engine, which is installed on a valve itself to enable injection at pressure greater than opening pressure, at which the fuel enters into a fuel valve, thereby improving fuel injection performance, and which is configured to enable adjustment of an injection timing at the opening pressure within the valve, wherein injection timings through a solenoid valve is provided for low load and high load, respectively, such that a distinct difference exists between the injection timings to open the nozzle hole of the nozzle in a differential manner at pressure higher than the pressure, at which the fuel enters to the fuel valve and internal spring opening pressure, thereby injecting fuel at high pressure even at low load to facilitate vaporization, and wherein, in case of a high speed operation or high load, low pressure/high pressure needle valves are opened at the same time to quickly inject fuel of a high volume through a plurality of nozzle holes, thereby improving combustion performance of an engine, and wherein a space between the needle valve and the nozzle hole which are closed after the injection is minimized because the nozzle hole is opened differentially and sequentially according to pressure, thereby avoiding waste of fuel and reducing harmful gas (smoke, Nox).
摘要:
The present invention relates to a fuel injection pump having a separable plunger being capable of not only easily adjusting a timing and a form of fuel injection with a simple structure but also enabling fine pre-injection of an engine at high pressure, thereby assisting in warming up within an engine cylinder, such that complete combustion may occur when main fuel is entered. The fuel injection pump having the separable plunger includes a separable plunger of which outer circumference is slide coupled to an inside of the barrel such that a lower portion thereof is supported by an upper portion of the main plunger to enable upward and downward slide movement in association with the main plunger, wherein an injection timing control spiral step of which upper surface is formed in a spiral shape is protrudingly formed on the outer circumference thereof and a fuel passage is formed on one side of the outer circumference thereof including the injection timing control spiral step and an elastic member having a lower portion elastically supported by the separable plunger and an upper portion inserted within the barrel to be supported by an upper surface of the barrel.