KR100373257B1 - Fuel injector for vehicle engine - Google Patents

Abstract

PURPOSE: A fuel injector is provided to achieve stabilized combustion by allowing the atomized fuel in the combustion chamber to be uniformly distributed in a high density. CONSTITUTION: A grid electrode plate(54) is mounted in an injection port(36) of an injector(50), wherein the grid electrode plate has a pair of grid electrodes arranged on the grid electrode plate in such a manner that the pair of grid electrodes cross with each other and form a plurality of elongated holes. A radio frequency generator(56) for converting a polarity is connected to each of grid electrodes. The injector includes a solenoid coil(14), an armature(16), a ball type needle valve(18), a return spring(22) and a wiring connector(24).

Description

Fuel Injection Injectors for Automotive Engines

The present invention relates to a fuel injection injector of a vehicle engine, and more particularly, to stabilized combustion by charging atomized fuel droplets during fuel injection to uniformly distribute atomized fuel in a combustion chamber at high density. A fuel injection injector for an engine.

In general, a mixer supplied to a gasoline engine requires high-precision control to simultaneously purify exhaust gas, reduce fuel consumption, and improve output.

Therefore, theoretically, a fuel injection device that can supply the mixer required by the engine is presently installed, and it electrically detects the intake air quantity and injects the fuel according to the operating conditions of the engine. Is called an electronic control room injector.

Exemplary Drawing 1 is a view showing a conventional injector mounting state, Figure 2 is a view showing a conventional injector, the injector 10 injects fuel to the intake port 12 of each model in accordance with a signal from a computer The solenoid coil 14, the armature (Amarture) 16, the ball-type needle valve 18, the orifice plate 20, the return spring 22, the wiring connector 24, etc. have.

When the current flows through the solenoid coil 14, the armature 16 is attracted and the ball-type needle valve 18 integrated with the armature 16 is sucked and the orifice plate 20 mounted in the injection hole 36 is sucked. The atomized fuel is injected into the intake port 12 through the orifice 26.

The injection amount of such fuel is determined by the time when the needle valve 18 is opened, that is, the energization time of the solenoid coil 14.

When the current is blocked in the solenoid coil 14, the needle valve 18 is returned to the original position by the return spring 22 to block the fuel injection.

As described above, the fuel injected from the injector 10 is introduced into the combustion chamber 30 while being mixed with the intake air, and the intake air filtered by the air cleaner is introduced into the intake pipe 32 by the opening degree of a throttle valve (not shown). The fuel is mixed with the atomized fuel while passing through the intake valve 28 and enters the combustion chamber 30 at the same time.

However, the atomized fuel injected from the conventional injector 10 to the intake port 12 is introduced into the combustion chamber 30 at the same time as the intake valve 28 is opened in a mixed state with the intake air coming in from the intake pipe 32. In this case, the mixer is to be uniformly distributed at high density throughout the interior of the combustion chamber 30 due to the flow rate of the intake air, the injection pressure of the injector 10 and the shape of the combustion chamber 30, etc. The atomized fuel in the mixer is not evenly distributed throughout the combustion chamber 30, the phenomenon is biased on one side, there is a problem that the flame propagation caused by the spark of the spark plug 34 is uneven and combustion is unstable.

Accordingly, the present invention has been made to solve the above-mentioned conventional problem, and replaces the orifice plate of the injector with a grid electrode plate that forms a long hole by crossing a pair of grid electrodes, and the pair of grid electrodes By connecting a radio frequence generator to the anode and the cathode, the atomized fuel droplets are charged at the time of injection, so that the charged air droplets can be charged and repulsed in the combustion chamber. In addition, an object of the present invention is to provide a fuel injection injector of a vehicle engine in which charged atomized fuel is uniformly and uniformly distributed.

According to the present invention for realizing the above object, a grid electrode plate having a plurality of grid electrodes intersected to form a plurality of long holes is formed in an injector of an injector, and a radio frequency generator for polarity conversion of the pair of grid electrodes. Is connected.

Therefore, in the present invention, when atomizing the fuel of the injector to the intake port, the droplets of atomized fuel are charged, respectively, so that the fuel droplets introduced into the combustion chamber together with the intake air are attracted to each other to enhance the high density in the combustion chamber. It is to achieve the stabilization of combustion that the flame propagation is uniform when the ignition flame is pulled by making the atomization fuel uniform by repulsive action.

1 is a schematic view showing a mounting state of a conventional fuel injection injector,

2 is an exemplary view showing a conventional injector,

3A is an exemplary view showing an injector according to the present invention;

(B) is also an example of a grid electrode plate mounted on the injector according to the present invention,

4 is a schematic view for explaining the charging of atomized fuel during the fuel injection of the injector according to the present invention.

-Explanation of symbols for the main parts of the drawings-

14-solenoid coil, 16-armature,

18-Ball Needle Valve, 22-Return Spring,

24-wiring connector, 36-nozzle,

50-injector, 52,52a, 52b-long hole,

54-grid electrode plate, 56-radio frequency generator,

58,58'-grid electrode, 60-grid electrode case,

62,62 ', 64,64'- Droplets of fuel.

The present invention will be described in detail with reference to the accompanying drawings of FIGS. 1 to 4 as follows.

According to the present invention, a grid electrode plate 54 in which a plurality of long holes 52 are formed by crossing a pair of grid electrodes 58 is mounted on the injection hole 36 of the injector 50, and each grid electrode 58 is formed. ) Is a fuel injection injector of a vehicle engine in which a radio frequency generator 56 for polarity conversion is connected.

Exemplary Drawing FIG. 3A is an exemplary view showing an injector according to the present invention, and (B) is an exemplary view of a grid electrode plate mounted to the injector according to the present invention.

Here, the injector 50 according to the present invention has a structure substantially the same as that of the conventional injector 10, and the solenoid coil 14, the armature 16, the ball-type needle valve 18, the return spring 22 Although the wiring connector 24 is the same, the grid electrode plate 54 is replaced with the orifice plate 20 mounted in the injection hole 36 in front of the ball-type needle valve 18.

The grid electrode plate 54 has an internal structure such that a pair of grid electrodes 58 and 58 ′ intersect with the grid electrode case 60, and the grid electrodes 58 intersect with the grid electrode case 60. Between 58 ', a plurality of long holes 52 are formed to allow the injected fuel to atomize.

In addition, the pair of grid electrodes 58 and 58 'is connected to the radio frequency generator 56.

The radio frequency generator 56 supplies a current having a range of frequencies (about 100-10,000 Hz) to the grid electrodes 58 and 58 'for a range of time (1/100-1 / 10,000 seconds). The polarity of the grid electrodes 58 and 58 'is supplied to the inside so as to be converted.

When the current flows through the solenoid coil 14, the injector 50 is sucked into the armature 16, and the ball-type needle valve 18 integrated with the armature 16 is sucked and mounted in the injection hole 16. The atomized fuel is injected into the intake port 12 through the long hole 52 of the grid electrode plate 54, but the droplets of the atomized fuel passing through the grid electrode plate 54 are transferred to the grid electrode 58. 58 58 ', it becomes a charged charge. 4 illustrates an example of how the atomized fuel droplets are charged as described above.

Here, the atomized fuel injected by the suction of the ball-type needle valve 18 of the injector 50 passes through a plurality of long holes 52 formed in the grid electrode plate 54 to the current supplied from the radio frequency generator 56. The droplets of fuel are charged by the influence of the grid electrodes 58 and 58 'charged at different polarities, for example, the fuel droplet 62 passing through the specific long hole 52a at a specific time is positive on the left side. When passing between the grid electrode 58 charged with the negative electrode and the grid electrode 58 'charged with the negative electrode on the right side, the left side of the fuel droplet 62 has a negative electrode and the right side has a positive electrode.

Thereafter, when the polarities of the grid electrodes 58 and 58 'are reversed, the other fuel droplets 62' passing through the long hole 52a have the opposite polarity to the previous fuel droplets 62.

In addition, the fuel droplet 64 passing through the other long hole 52b next to the long hole 52a at the specific time is the cathode of the grid electrode 58 'on the left side and the anode of the grid electrode 58 on the right side. Therefore, the left side of the fuel droplet 64 is charged to the anode and the right side to the cathode.

Thereafter, when the polarities of the grid electrodes 58 'and 58 of the other long hole 52b are opposite to each other, another fuel drop 64' passing through the long hole 52b has a polarity opposite to that of the previous fuel drop 62. Will have

Therefore, the two fuel droplets 62 and 64 passing through the long holes 52a and 52b at the same time are moved away from each other by the repulsive force, which is the pushing force, and the fuel droplets sequentially passing through the same long hole 52a ( 62) (62 ') try to get closer by attracting force, which is pulling force.

In other words, the attractive force between the fuel droplets 62 and 62 'is the force that makes the fuel distribution high density during the fuel injection, and the repulsive force between the fuel droplets 62 and 64 is the force that makes the fuel distribution uniform. .

Due to the role of the grid electrode plate 54 mounted on the injector 50 as described above, since most of the fuel is charged so that attraction and repulsive force are applied to the fuel of the injector 50, the atomized fuel is sucked in the air. When entering into the combustion chamber 30 together with the fuel distribution is uniform throughout the combustion chamber 30, the fuel density is increased.

As described above, the present invention allows the droplets of atomized fuel to be charged when atomizing the fuel of the injector to the intake port, respectively, so that the fuel droplets introduced into the combustion chamber together with the suction air are attracted to each other by the attraction force. By achieving a high density of and by the repulsive action to achieve the uniformization of atomized fuel has an effect that can achieve the stabilization of combustion that the flame propagation is uniform when the ignition flame is pulled.

Claims (1)

A grid electrode plate 54 in which a plurality of long holes 52 are formed by crossing a pair of grid electrodes 58 is mounted on the injection hole 36 of the injector 50, and polarities are formed on the grid electrodes 58. A fuel injection injector for a vehicle engine, characterized by connecting a radio frequency generator 56 for conversion.