JPS62153614A - Fuel injection nozzle - Google Patents

Abstract

PURPOSE:To provide a complete combustion of fuel by a method wherein a light receiving body arranged in a fuel passage is heated by a laser and the fuel is injected and supplied into a cylinder while being partially gasified. CONSTITUTION:When a fuel is injected, a laser oscillator 10 is operated and a laser beam oscillated from a laser oscillator 10 radiates a light receiving body 3 fixed within a light receiving body storing part 2b through a glass plate 4 and then heats it. Fuel injected and supplied from an injection pump into a nozzle 2 is fed from a fuel supplying port 2c to a fuel passage hole 2a, passes while being contacted with the light receiving body 3 fixed within the light receiving body storing part 2b, heated to a hot temperature, an inner part of the storing part 2b is caused to have a high pressure with a part of the fuel being gasified and then the fuel is injected and supplied from the extremity end 2a of the nozzle 2 into the cylinder. Therefore, the fuel is heated up to a hot temperature and injected at a high pressure to form some fine particles. Since at lease a part of the fuel is gasified, the fuel is completely burnt.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in fuel injection nozzles for internal combustion engines and vaporizing burners.

[Conventional technology]

A fuel injection nozzle for an internal combustion engine is different from a carburetor or the like which extracts fuel by the negative pressure generated when air passes through a throttle, and instead applies pressure to the fuel and injects it from the nozzle.

Therefore, if a fuel injection nozzle is used, an abnormality in the air-fuel ratio at a specific rotation speed due to the venturi pressure fluctuation that tends to occur in a carburetor does not occur, and the resistance of the venturi can be reduced. Furthermore, since the dynamic effects of the intake pipe, particularly inertial supercharging, can be actively utilized, the output can be improved.

The injection method of fuel injection nozzles is divided into two types: continuous injection method and intermittent injection method, and is also broadly classified into in-cylinder injection and in-boat injection depending on the nozzle position. The continuous injection method described above is not possible for in-cylinder injection, but is adopted for in-port injection or in-manifold injection. On the other hand, the intermittent injection method is adopted for any of cylinder injection, port injection, and manifold injection.

Although the functionality of the above-mentioned fuel injection nozzle has been greatly improved compared to that using a conventional carburetor, it is still not satisfactory, and there is a need for a fuel injection nozzle that can further improve fuel efficiency and expand combustion efficiency. is required.

[Problem that the invention seeks to solve]

The present invention has been made based on the above-mentioned viewpoints, and its purpose is to improve fuel injection nozzles and improve fuel efficiency.

[Means for solving problems]

The above purpose is to provide a laser oscillator, an optical path for introducing laser light generated by the laser oscillator into a fuel flow path, and a photoreceptor provided in the fuel flow path for absorbing the laser light. This is achieved by using a fuel injection nozzle equipped with a fuel injection nozzle and promoting vaporization of the injected fuel.

[For production]

With the above configuration, the photoreceptor provided in the fuel flow path is heated by the laser, and the fuel flowing in contact with the photoreceptor is injected into the cylinder in an at least partially vaporized state. Complete combustion can be achieved through fine atomization, and therefore fuel efficiency can be improved.

〔Example〕

Hereinafter, details of the present invention will be specifically explained with reference to the drawings.

The drawing is an enlarged sectional view showing one embodiment of a fuel injection nozzle according to the present invention.

In the figure, ■ is a fuel injection nozzle, 2 is a nozzle, 2a is a fuel distribution hole, 2b is a photoreceptor accommodating portion formed in the center of the fuel distribution hole 2a, 2C is a fuel supply hole, and 3 is the above-mentioned fuel distribution hole. A photoreceptor fixed in the photoreceptor accommodating part 2b, 4 a glass plate,
5 is an 0 ring, 6 is a bag nut, 7 is a backing, 8 is a flanged attachment, 8a is a copper pipe, 9 is a bag nut,
Reference numeral 10 denotes a laser oscillator that heats the photoreceptor 3 fixed in the photoreceptor accommodating portion 2b by irradiating the photoreceptor 3 intermittently or continuously with laser light.

The fuel injection nozzle 1 is connected to an injection pump (not shown) via a backing 7 and a flanged attachment 8 with a cap nut 9, and the fuel injected into the nozzle 2 from the injection pump is The fuel passes through the fuel supply hole 2c and is sent into the fuel distribution hole 2a.

Approximately at the center of the fuel flow hole 2a, there is a photoreceptor accommodating portion 2.
b is formed, and a photoreceptor 3 made of ceramic or the like is fixed to the photoreceptor accommodating portion 2b.

Further, a glass plate 4 is provided at the rear end of the nozzle 2, and an O-ring 5 is provided at the rear end of the nozzle 2.
It is attached by a cap nut 6 via the cap nut 6.

In the fuel injection nozzle 1 according to the present invention, the laser oscillator 10 is driven during fuel injection, and the laser beam oscillated from the laser oscillator 10 is directed to the glass plate 4.
The photoreceptor 3 fixed in the photoreceptor accommodating portion 2b is irradiated and heated through the photoreceptor accommodating portion 2b.

At this time, it is recommended to control the amount of laser light irradiating the photoreceptor 3 in proportion to the amount of fuel supplied.

Fuel injected into the nozzle 2 from an injection pump (not shown) is sent from the fuel supply hole 2c to the fuel distribution hole 2a, and is delivered to the photoreceptor 3 fixed in the photoreceptor accommodating portion 2b. By contacting and passing through, it is heated to a high temperature, and a part of it is vaporized, creating a high pressure inside the housing part 2b, and it is ejected from the tip of the nozzle 2 into a cylinder, port, or manifold (not shown). Supplied.

Therefore, as mentioned above, the fuel flows through the fuel flow hole 2a of the nozzle 2.
When it is injected and supplied into a cylinder or the like (not shown), it is heated to a high temperature, ejected under high pressure, and is atomized into fine particles, and at least a part of it is vaporized.
Complete combustion occurs within the cylinder.

Furthermore, compared to conventional fuel injection nozzles, the fuel injection nozzle according to the present invention enables complete combustion of fuel, resulting in a significant improvement in fuel efficiency.

〔Effect of the invention〕

As described above, according to the present invention, the fuel passing through the fuel flow path is heated by the laser light from the laser oscillator, and a part of the fuel is vaporized and then injected into the cylinder, so that complete combustion is not achieved. This makes it possible to improve fuel efficiency and increase combustion efficiency.

Note that the present invention is not limited to the embodiments described above. That is, for example, in this embodiment, the nozzle is used as a fuel injection nozzle for an internal combustion engine, but it can also be used as a nozzle for a vaporizing burner that burns liquid fuel such as kerosene. Further, although the photoreceptor 3 is made of ceramic, other known materials may be used as long as they can achieve the same effect. Furthermore, although the laser oscillator 10 is provided separately from the nozzle 2, it may be formed integrally with the nozzle 2.

In addition, the shapes of the nozzle 2 and the photoreceptor 3, the shape of the photoreceptor accommodating portion 2b formed in the nozzle 2, the formation position thereof, etc. can be freely changed within the scope of the purpose of the present invention. encompasses all of them.

[Brief explanation of drawings]

The drawing is an enlarged sectional view showing one embodiment of a fuel injection nozzle according to the present invention. 1--1-・---------------1--Fuel injection nozzle 2----
-Nozzle 2a--------Fuel flow hole 2b--------------Photoreceptor housing part 2cm---- −−−−1・−−−−・〜−−−
---Fuel supply hole 3-----
-m-Photoreceptor 4------------Glass plate 5-------1----------,...0 ring 6-- −・−−−−−−−−−−−−−−−−−−
Cap nut, 7-------------Backing 8----m=-----Axotiment with flange 8
a-----・--1-------? Same pie.

Claims (1)

[Claims] A fuel injection nozzle comprising a laser oscillator, an optical path for introducing laser light generated by the laser oscillator into a fuel flow path, and a photoreceptor provided in the fuel flow path for absorbing the laser light.