CN209959383U

CN209959383U - Electric control fuel micro-injection nozzle of two-stroke gasoline engine of unmanned aerial vehicle

Info

Publication number: CN209959383U
Application number: CN201920182708.1U
Authority: CN
Inventors: 谭晞铭; 谭泽裕
Original assignee: Beihai Skyline Aviation Technology Co Ltd
Current assignee: Beihai Skyline Aviation Technology Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2020-01-17
Anticipated expiration: 2029-02-01

Abstract

The utility model discloses an electric control fuel oil micro fuel injection nozzle of an unmanned plane two-stroke gasoline engine, wherein a fuel injection nozzle component, an armature sliding sleeve, a main oil pipe and a filter screen sleeve are sequentially connected from bottom to top, an electromagnetic coil is positioned at the lower part of the main oil pipe and outside the upper part of the armature sliding sleeve, and a coil shell is arranged outside the electromagnetic coil; the lead-out wire envelope surrounds and locates the coil shell outside, and the filter screen cover outside is equipped with the valve body above the lead-out wire envelope, and valve body one side is connected and is equipped with fuel feed pipe quick-operation joint. The utility model discloses the automatically controlled fuel miniature fuel sprayer of unmanned aerial vehicle two-stroke gasoline engine changes traditional fuel sprayer project organization, has left out parts such as valve rod, hollow shaft, the cover that adopt usually in the conventional fuel sprayer, through the design of engine electricity injection system, has saved the oil returning device and the accuse pressure equipment of traditional fuel sprayer. The omission of these components simplifies the internal structure of the fuel injection nozzle and makes it possible to shorten the length of the fuel injection nozzle.

Description

Electric control fuel micro-injection nozzle of two-stroke gasoline engine of unmanned aerial vehicle

Technical Field

The utility model relates to a special two-stroke gasoline engine that uses for unmanned aerial vehicle designs and develops specially, adopts microcomputer control's fuel injection system's miniature fuel sprayer.

Background

At present, most unmanned aerial vehicles using fuel oil engines as power use two-stroke reciprocating piston engines, membrane type carburetors used by the engines are often high in carburetor failure rate in actual use, and membrane type two-stroke gasoline engine carburetors have the following common failure phenomena: difficult starting, unstable idling, poor transition, insufficient power, oil leakage, high oil consumption and the like. The failure rate of engines using diaphragm carburetors is 70%.

SUMMERY OF THE UTILITY MODEL

In the fuel injection system with ECU control, must use the fuel sprayer, adopt the fuel intake duct injection mode, according to the real-time operating mode of engine, control the accurate crankcase that sprays of fuel in, improve fuel efficiency, reduce oil consumption and improve the stability and the reliability of engine work, be the utility model aims at.

The utility model aims at realizing the following technical scheme that the electric control fuel micro fuel spray nozzle of the two-stroke gasoline engine of the unmanned aerial vehicle comprises a fuel supply pipeline component, wherein the pipeline component consists of a filter screen, a fuel spray nozzle component, an armature sliding sleeve, a main fuel pipe and a filter screen sleeve; the oil nozzle assembly, the armature sliding sleeve, the main oil pipe and the filter screen sleeve are sequentially connected from bottom to top, the electromagnetic coil is positioned on the outer sides of the lower part of the main oil pipe and the upper part of the armature sliding sleeve, and a coil shell is arranged on the outer side of the electromagnetic coil; the oil supply pipeline assembly is internally provided with a spherical valve needle, an armature, a return spring and a return spring positioning nail from bottom to top in sequence, the lower end of the return spring is positioned on the middle step surface in the armature, and the center of the upper end of the return spring is provided with the return spring positioning nail; a filter screen is arranged on the inner side of the filter screen sleeve, and the return spring positioning nail is positioned below the filter screen; the lead-out wire envelope surrounds and locates the coil shell outside, and the filter screen cover outside is equipped with the valve body above the lead-out wire envelope, and valve body one side is connected and is equipped with fuel feed pipe quick-operation joint.

Preferably, the middle part of the outer wall of the armature sliding sleeve is provided with a protruding disc shape, and the lower end of the coil shell is welded with the outer end of the disc shape.

Preferably, the upper end of the outer wall of the filter screen is connected with the upper end of the inner wall of the filter screen sleeve in a welding mode.

Preferably, the oil nozzle assembly comprises a spherical valve needle base, an outer sleeve and an oil injection pore plate, the outer sleeve is tubular, the oil injection pore plate is located at the bottom in the outer sleeve, an oil injection pore is arranged at the center, and the spherical valve needle base is arranged on the oil injection pore plate.

The important part in the throttle valve assembly is an oil nozzle, and the oil nozzle is a normally closed electromagnetic valve, and the opening and closing of a valve needle of the oil nozzle are controlled by the action of the electromagnetic valve. When the ECU sends out an oil injection signal, the command voltage is loaded on the solenoid valve coil to generate current, the current generates a magnetic field on the coil to control the opening and closing of the valve needle, and the injection oil supply has the advantages of accurate fuel supply control, accurate air-fuel ratio of the engine in any state, smooth operation of the engine and meeting strict emission regulation requirements.

Due to the limitation of the special structure of the engine for the unmanned aerial vehicle, an oil nozzle which is one of key components of the electronic fuel injection engine needs to be miniaturized, simultaneously meets the characteristics of oil supply and oil properties of the two-stroke engine, and ensures high precision and high reliability.

At present, fuel spray nozzles in the market are designed and manufactured for motor vehicles such as automobiles and the like, and are complex in structure, large in size, heavy in weight and large in oil output, so that the fuel spray nozzles are not suitable for the use requirement of an unmanned aerial vehicle engine. In order to solve the special requirement of unmanned aerial vehicle two-stroke engine to the fuel sprayer among the background art, the utility model provides a small-size electron fuel sprayer that supplies unmanned aerial vehicle two-stroke engine to use has solved the special demand of unmanned aerial vehicle two-stroke engine electricity injection system to the fuel sprayer.

The utility model discloses the automatically controlled fuel miniature fuel sprayer of unmanned aerial vehicle two-stroke gasoline engine changes traditional fuel sprayer project organization, has left out parts such as valve rod, hollow shaft, the cover that adopt usually in the conventional fuel sprayer, through the design of engine electricity injection system, has saved the oil returning device and the accuse pressure equipment of traditional fuel sprayer. After the components are omitted, the internal structure of the oil nozzle is simplified, the length of the oil nozzle can be shortened, the outer diameter and the weight of the oil nozzle are effectively reduced and lightened through the valve body sectional design and the laser welding process, and the design of the oil nozzle reaches the special requirements of an electric control fuel system of the two-stroke gasoline engine of the unmanned aerial vehicle on the oil nozzle by adopting the process of packaging after the electromagnetic valve lead wire is pressed and connected by adopting an insulating material.

Drawings

Fig. 1 is the utility model discloses unmanned aerial vehicle two-stroke gasoline engine automatically controlled fuel oil miniature fuel sprayer's cross-sectional view.

Fig. 2 is a schematic structural view of an oil supply line assembly.

Fig. 3 is a schematic structural view of the oil jet assembly.

In the figure: 1. the device comprises an oil supply pipe quick connector 2, a valve body 3, a filter screen 4, a sealing ring 5, a return spring 6, an electromagnetic coil 7, a coil shell 8, an oil nozzle component 9, an armature 10, an armature sliding sleeve 11, a spherical valve needle 12, an oil injection hole 13, a leading-out wire envelope 14, an in-valve oil pipe 15, a sealing ring 16, a power supply interface 17, a main oil pipe 18, a filter screen sleeve 19, a return spring positioning nail A, an oil supply hole B, a laser precision micro-welding J, an oil injection hole a, a spherical valve needle base B, an oil injection hole plate c and an outer sleeve.

Detailed Description

The technical scheme of the utility model is described in detail with the accompanying drawings.

As shown in fig. 1-3, the present embodiment discloses an electrically controlled fuel micro-injector for two-stroke gasoline engine of unmanned aerial vehicle, and mainly introduces the structure and processing technology of the fuel supply pipeline, and the pipeline is composed of the filter screen 3, the injector assembly 8, the armature sliding sleeve 10, the main fuel pipe 17, and the filter screen sleeve 18 in fig. 1. When the filter screen 3, the oil nozzle assembly 8, the armature sliding sleeve 10, the main oil pipe 17 and the filter screen sleeve 18 are combined, firstly, the oil nozzle assembly 8 is formed by respectively welding the spherical valve needle base a, the oil injection pore plate B and the outer sleeve c in the figure 3 by using a precision tool die through laser precision micro welding (a point B in the figures 2 and 3 is a welding example), and then the oil nozzle assembly 8, the armature sliding sleeve 10, the main oil pipe 17 and the filter screen sleeve 18 are formed by welding the oil nozzle assembly 8, the armature sliding sleeve 10, the main oil pipe 17 and the filter screen sleeve 18 into an oil supply pipeline assembly through laser precision micro welding by using. The electromagnetic coil 6 is arranged in the coil shell 7 according to the positioning position on the coil shell 7, and the coil shell provided with the electromagnetic coil 6 is welded on the excircle of the armature sliding sleeve 10 by laser precision micro-welding.

The spherical valve needle 11, the armature 9, the return spring 5 and the return spring positioning nail 19 are respectively installed in a welded oil supply pipeline component in sequence, the filter screen 3 is pressed into the filter screen sleeve 18 by using special pressing equipment and a mould, and the laser precision micro welding is adopted.

And (3) packaging the outgoing line envelope 13 on the ring shell 7 according to a positioning position by using heat sealing and pressing equipment, installing the sealing ring 4, pressing the sealing ring into the valve body 2, and screwing the oil supply pipe quick connector 1.

The oil nozzle simplifies the internal structure of the conventional oil nozzle, and adopts the advanced laser precision micro-welding technology, so that the processing technology of the integrated inner tube is reduced. The armature 9 and the spherical valve needle are designed and processed integrally, and an oil return pressure control device which is necessary for a conventional oil nozzle is omitted through microcomputer design of the ECU and the miniature high-pressure oil pump, so that the length and the size of the oil nozzle are greatly reduced, the weight is greatly reduced, and the requirement of an electric control fuel injection system of a two-stroke gasoline engine of an unmanned aerial vehicle on the miniature oil nozzle is completely met.

The fuel spray nozzle is long-time in multiple batches, uninterrupted, high-altitude test and practical use, and the design requirements of an electric control fuel injection system of a two-stroke gasoline engine of an unmanned aerial vehicle on a miniature fuel spray nozzle are met.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric control fuel oil micro fuel nozzle of an unmanned aerial vehicle two-stroke gasoline engine is characterized by comprising an oil supply pipeline assembly, wherein the pipeline assembly consists of a filter screen, a fuel nozzle assembly, an armature sliding sleeve, a main oil pipe and a filter screen sleeve; the oil nozzle assembly, the armature sliding sleeve, the main oil pipe and the filter screen sleeve are sequentially connected from bottom to top, the electromagnetic coil is positioned on the outer sides of the lower part of the main oil pipe and the upper part of the armature sliding sleeve, and a coil shell is arranged on the outer side of the electromagnetic coil; the oil supply pipeline assembly is internally provided with a spherical valve needle, an armature, a return spring and a return spring positioning nail from bottom to top in sequence, the lower end of the return spring is positioned on the middle step surface in the armature, and the center of the upper end of the return spring is provided with the return spring positioning nail; a filter screen is arranged on the inner side of the filter screen sleeve, and the return spring positioning nail is positioned below the filter screen; the lead-out wire envelope surrounds and locates the coil shell outside, and the filter screen cover outside is equipped with the valve body above the lead-out wire envelope, and valve body one side is connected and is equipped with fuel feed pipe quick-operation joint.

2. The electronically controlled fuel micro-injector of two-stroke gasoline engine for unmanned aerial vehicle of claim 1, wherein the injector assembly comprises a spherical valve needle base, an outer sleeve, and an injector orifice plate, the outer sleeve is tubular, the injector orifice plate is located at the bottom of the inner sleeve, the center of the injector orifice plate is provided with an injector orifice, and the spherical valve needle base is arranged on the injector orifice plate.

3. The electrically-controlled fuel micro-injector of the two-stroke gasoline engine of the unmanned aerial vehicle of claim 1, wherein the armature sliding sleeve is provided with a protruding disk shape in the middle of the outer wall, and the lower end of the coil housing is welded to the outer end of the disk shape.

4. The electrically-controlled fuel micro-injector of the two-stroke gasoline engine of the unmanned aerial vehicle of claim 1, wherein the upper end of the outer wall of the filter screen is welded to the upper end of the inner wall of the filter screen sleeve.