JPH05321778A - Fuel supply method in internal combustion engine - Google Patents

Abstract

PURPOSE:To provide a fuel supply method capable of giving an electric change to fuel to accelerate ignition/combustion in a stage of atomization or vaporization of fuel at the operating time of an internal combustion engine, or capable of perfoming atomization or motion of electrified fuel in an intake system or in a combustion chamber by utilizing force of an electric field. CONSTITUTION:Electrodes are provided at plural places in the travelling direction of fuel comes out from a fuel atomizing or vaporizing means 2 and that means, connect them to either of the electrodes, positive or negative, of the source 6 of their direct current, and force them to generate electric discharge or an electric field between the electrodes, etc., to ionize or electrify the fuel. For example, while first electrode 3 is provided to the fuel atomizing or vaporizing means and connect it to the negative electrode of the source of direct current, second electrode 4 and third electrode 5 are respectively provided nearby that electrode and a combustion chamber 12, and these electrodes are respectively connected to the positive electrode of the source of direct current, and electric discharge is generated between the electrodes to ionize or electrify the fuel released from the atomizing or vaporizing means negative, thereby, at least, a part of the fuel is attracted to the electrode 5 or its vicinity by the sucking force between the negative charge that the fuel possesses and the positive charge that the electrode 5 possesses.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for supplying fuel to be used for combustion in an internal combustion engine such as a spark ignition type four-cycle piston engine. A fuel that changes the properties of the fuel and accelerates the ignition and combustion of the fuel by ionizing or charging the granular fuel), or by utilizing the force of the electric field to control the motion of the fuel. Regarding supply method.

[0002]

2. Description of the Related Art A conventional fuel supply method for an internal combustion engine, for example, a four-cycle piston engine, first vaporizes the fuel by discharging the fuel into the air by using a carburetor or an injector provided in an intake system. By atomizing and then causing a specific motion (vortex, turbulent flow, etc.) in the air sucked into the combustion chamber to move the fuel, the ignition and combustion of the fuel is stabilized.

[0003]

The above-mentioned conventional fuel supply method only facilitates ignition combustion by adding motion of air to the fuel atomized by the fuel atomization or vaporization means, and the fuel itself. Could not be modified to facilitate ignition and combustion.

Further, in the above conventional fuel supply method, since the motion of atomized or vaporized fuel in the intake system or the combustion chamber depends on the flow motion of air in the intake system or the combustion chamber, the fuel is supplied in the combustion chamber. Although it is easy to diffuse the fuel, it is difficult to stably guide the fuel by concentrating it at a specific place in the combustion chamber. Therefore, for example, in a four-cycle piston engine that performs lean combustion by setting the air-fuel ratio near the combustion limit (for example, about 20: 1 when gasoline is used as the fuel) in order to achieve low pollution and improvement in fuel consumption. In order to prevent misfire and incomplete combustion, it is essential to make the fuel unevenly distributed in the combustion chamber to thicken the fuel in the vicinity of the spark plug. It is difficult to concentrate the fuel on the engine, and even if the fuel can be concentrated by appropriately controlling the movement of the air in the combustion chamber, the output characteristics of the engine are sacrificed and the structure of the intake system is very complicated. There is anxiety such as becoming.

An object of the present invention is to provide a fuel supply method capable of promoting ignition combustion by giving an electrical change to the property of the fuel in the atomization or vaporization stage of the fuel in the operation stroke of the internal combustion engine, or the internal combustion engine. The movement of atomized or vaporized fuel in the intake system or combustion chamber of the engine can be performed by utilizing the force of the electric field without relying solely on the movement of air. For example, the fuel is concentrated at a predetermined place in the combustion chamber. It is to provide a possible fuel supply method.

[0006]

In order to solve the above-mentioned problems, a fuel supply method according to the present invention has a fuel atomization or vaporization means provided in an internal combustion engine and the progress of fuel discharged from the atomization or vaporization means. By installing electrodes at a plurality of locations selected in the path and selectively connecting the plurality of electrodes to either positive or negative poles of a DC power source, a discharge or electric field is generated between the electrodes or to the individual electrodes. Thus, a fuel supply method for ionizing or charging the fuel traveling between the electrodes was created.

In the fuel supply method, for example, a first electrode is provided in the fuel atomization or vaporization means and connected to the negative electrode of the DC power source, while the vicinity of the first electrode and the combustion chamber of the internal combustion engine are used. A second electrode and a third electrode respectively, and by connecting the second and third electrodes to the positive electrode of the DC power supply, respectively, the second electrode provided in the vicinity of the first electrode Discharge between the electrodes of
The fuel discharged from the atomizing or vaporizing means that advances between the electrodes is negatively ionized or charged. Then, at least a part of the fuel is attracted to the third electrode or the vicinity thereof by the attractive force generated between the negative charge of the fuel and the positive charge of the third electrode.

As the third electrode provided in the combustion chamber, for example, an electrode of a spark plug in a spark ignition type internal combustion engine is used.

[0009]

The fuel supply method according to the present invention produces a discharge or an electric field between a plurality of electrodes provided at any place selected from the fuel atomization or vaporization means and the path of travel of the atomized or vaporized fuel, or between the electrodes. Then, the atomized or vaporized fuel that advances between the electrodes is ionized or charged. And
Since the atomized or vaporized fuel in the ionized state is activated and easily reacts with other elements, for example, it becomes easier to combine with oxygen (oxidation) as compared with that before the ionization, and therefore ignition combustion Be promoted. Also, the ionized or charged fuel is
It moves according to the electric field generated between the fuel and the electrode or the force of the electric field generated between the electrodes.

[0010]

Embodiments of the fuel supply method according to the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 illustrates one embodiment of a fuel supply method according to the present invention. First, a fuel atomization or vaporization means 2 (for example, a fuel atomization or vaporization means 2 provided in an intake system 11 of an internal combustion engine 1 (for example, a 4-cycle piston engine)) The first electrode 3 is provided in the nozzle portion of the injector, and the second electrode 4 having a shape along the inner circumference of the wall surface forming the advancing passage of the atomized or vaporized fuel is provided close to the first electrode 3. To do. Then, the electrode 3 is connected to the negative (-) pole of the DC power source 6 and the electrode 4 is connected to the positive (+) pole, respectively, to generate a discharge or an electric field between the electrodes 3-4, and the electrode 3 The atomized or vaporized fuel that proceeds between −4 is negatively ionized or charged.

According to the present embodiment, the atomized or vaporized fuel in the ionized state is activated and easily reacts with other elements. Therefore, for example, the atomized or vaporized fuel is bound to oxygen (oxidation) as compared with that before ionization. Is facilitated, thus promoting ignition and combustion. The negatively ionized or charged fuel is fuel of the fuel atomization or vaporization means 2 according to the electric field generated between the fuel and the electrode 3 or 4 or the force of the electric field generated between the electrodes 3-4. Since the fuel moves in the same direction as the discharge direction, the fuel is smoothly drawn into the combustion chamber 12 (see the dotted arrow in FIG. 1).

Since the internal combustion engine 1 of this embodiment is provided with the ignition plug 7 in the combustion chamber 12, at least when an ignition discharge voltage is applied to the plug 7,
At least a part of the negatively ionized or charged fuel is attracted to the positive electrode of the plug 7 or the vicinity thereof, and an effect of promoting ignition and combustion can be expected.

Embodiment 2 FIG. 2 illustrates another embodiment of the fuel supply method according to the present invention. First, similar to Embodiment 1, the fuel atomization or vaporization provided in the intake system 11 of the internal combustion engine 1 is first described. The means 2 is provided with the first electrode 3 and is connected to the negative (-) pole of the DC power source 6,
In the intake path near the electrode 3, for example, a grid-shaped second
Electrode 4 is provided, and the center electrode of the spark plug 7 provided in the combustion chamber 12 is used as the third electrode 5, and the electrodes 4 and 5 are connected to the positive (+) pole of the DC power source 6. ..
Then, when the atomized or vaporized fuel traveling between the electrodes 3-4 is negatively ionized or charged by the discharge generated between the electrodes 3 and 4, the fuel is charged by the electrodes 3-4.
According to the force of the electric field generated between the electrodes 4, the electrode 3 moves toward the electrode 4 and further passes through the grid of the electrode 4 and is smoothly sucked into the combustion chamber 12. Then, the negative charge of the fuel and the electrode 5
At least a part of the fuel is attracted to the electrode 5 or the vicinity thereof by the attractive force generated between the fuel and the positive charge (see the dotted arrow in FIG. 2).

In this embodiment, since the center electrode of the spark plug 7 is used as the third electrode 5 and the positive electrode of the power source 6 is connected to the third electrode 5, regardless of the ignition discharge voltage applied to the plug 7. Since the fuel can be always attracted and concentrated around the electrode 5, the ignition and combustion of the fuel becomes easier.

In the fuel supply method according to the present invention, it is considered that ionization and electrification phenomena occur simultaneously in parallel with atomized or vaporized fuel. In that case, both fuel reforming and motion control are performed. The effect of can be expected.

Further, in the fuel supply method according to the present invention, for example, by adding or connecting a control function to the DC power source 6, the electrodes are intermittently energized or the voltage is changed according to the operating state of the engine. It is conceivable to control it. By the control, it becomes possible to perform the ionization of the fuel or the generation of the charged state or the motion control of the fuel most suitable for the operating state of the engine at that time.

Further, the fuel supply method according to the present invention can be carried out not only in the above embodiment but also in a spark ignition type two cycle piston engine, a rotary engine, a diesel engine or a gas turbine engine. Even when it is difficult to control the movement of atomized or vaporized fuel by the force of the electric field due to structural problems of the engine, for example, as shown in the first embodiment, the fuel atomization or vaporization means is used. Since it is possible to provide the electrodes 2 and the electrodes 3 and 4 in the vicinity thereof in any of the above-mentioned engines, if the atomized or vaporized fuel is ionized by the discharge between the electrodes 3-4, at least the fuel The effect of promoting ignition and combustion by ionization is guaranteed.

[0018]

According to the fuel supply method of the present invention, when the fuel is atomized or vaporized in the operation stroke of the internal combustion engine,
The atomized or vaporized fuel is ionized or charged. Therefore, ignition and combustion of the fuel activated by ionization (that is, ionization) is promoted, and stable combustion becomes possible.

Further, the ionization or electrification of the fuel causes the motion of the fuel to be electrically affected, so that the motion of the fuel can be controlled by the force of the electric field. Therefore, for example, In a lean burn type spark ignition piston engine, fuel can be attracted to the vicinity of the electrode of the spark plug by the electric attraction force and an environment of a rich air-fuel mixture can be generated around the plug. It becomes easier, and the fear of misfire and incomplete combustion can be eliminated.

[Brief description of drawings]

FIG. 1 is a simplified explanatory view showing an embodiment of a fuel supply method according to the present invention,

FIG. 2 is a simplified explanatory view showing another embodiment of the fuel supply method according to the present invention,

[Explanation of symbols]

1. ． ． ． ． ． ． ． ． ． Internal combustion engine, 11. ． ． ． ． ． ． ． Its intake system, 12. ． ． ． ． ． ． ． The combustion chamber, 2. ． ． ． ． ． ． ． ． ． 2. Fuel atomization or vaporization means (eg injectors) ． ． ． ． ． ． ． ． ． 3. electrode (first electrode); ． ． ． ． ． ． ． ． ． 4. electrode (second electrode), ． ． ． ． ． ． ． ． ． Electrode (third electrode), 6. ． ． ． ． ． ． ． ． ． DC power supply, 7. ． ． ． ． ． ． ． ． ． Spark plug.

Claims (3)

[Claims] 1. An electrode is installed at a plurality of locations selected in a fuel atomization or vaporization means provided in an internal combustion engine and a traveling path of fuel discharged from the atomization or vaporization means, and each of the plurality of electrodes is provided with a DC power source. By selectively connecting to either the positive or negative pole of, the discharge or electric field is generated between the electrodes or the individual electrodes to ionize or charge the fuel propagating between the electrodes. Fuel supply method. 2. A first electrode is provided on the fuel atomizing or vaporizing means to connect to a negative electrode of the DC power source, and the first electrode is connected to the first electrode.
Second in the vicinity of the electrodes of the internal combustion engine and in the combustion chamber of the internal combustion engine.
Electrode and a third electrode, and the second and third electrodes thereof are respectively connected to the positive electrode of the DC power supply,
Of the atomization or vaporization means discharged between the electrodes by causing a discharge between the electrodes and the second electrode to negatively ionize or charge the fuel, and thereby the negative charge of the fuel and the first The fuel supply method according to claim 1, wherein an attraction force is generated between the third electrode and a positive charge, and at least a part of the fuel is attracted to the third electrode provided in the combustion chamber or the vicinity thereof. .. 3. The third electrode provided in the combustion chamber is an electrode of a spark plug in a spark ignition type internal combustion engine.
The fuel supply method described in.