CN105114226A - Electronic control gasoline injector with heating function - Google Patents

Abstract

The invention relates to an automobile accessory, in particular to an electronically controlled gasoline injector with a heating function used in an automobile engine fuel injection system. The specific technical solution is: an electronically controlled gasoline injector with heating function, including a fuel injector housing, which is provided with an oil inlet end and an oil outlet end, and the fuel injector housing is equipped with an inner cavity The guide tube is equipped with a coil assembly, and the guide tube is provided with an armature linked with the coil assembly. The end of the guide tube extending to the oil outlet is provided with an oil outlet. The oil outlet is provided with a valve seat. On the valve seat There is a fuel injection port with one end connected to the inside of the guide pipe and the other end connected to the outside of the guide pipe. The fuel injector housing is provided with a heating component, and the fuel inlet end of the fuel injector housing is provided with a fuel injection port electrically connected to the heating component. Fuel heating filter mechanism. By adopting the above technical scheme, an electronically controlled gasoline injector with heating function is provided which is environmentally friendly, energy-saving, fully combustible, and simple in structure.

Description

Electronically controlled gasoline injector with heating function

technical field

The invention relates to an automobile accessory, in particular to an electronically controlled gasoline injector with a heating function used in an automobile engine fuel injection system.

Background technique

The electronically controlled gasoline injector is the core component of the fuel supply system of a modern automobile engine, and its function is to accurately measure fuel and form a spray. Under the action of the fuel injection pulse issued by the engine electronic control unit, the electronically controlled gasoline injector sprays out a certain amount of fuel and mixes with the air entering the cylinder to form a predetermined concentration of mixed gas to meet the requirements of different engine operating conditions. The need for mass and air-fuel ratio control. Therefore, the performance of the electronically controlled gasoline injector has an important influence on the combustion process and emission performance of the automobile engine.

With the increasingly stringent automobile economy and emission regulations at home and abroad, the requirements for the control accuracy of the mixture gas quality and air-fuel ratio of automobile engines are continuously improved. Correspondingly, the working characteristics of electronically controlled gasoline injectors are also increasingly strict. requirements. Because the structural composition and processing technology directly affect the accuracy of fuel metering, dynamic response characteristics, stability of working performance and product manufacturing cost of electronically controlled gasoline injectors.

However, during the use of traditional electronically controlled gasoline injectors, when the engine is cold started, the sprayed particles are relatively large, and the fuel is not easy to evaporate, resulting in high HC emissions from the engine, which is not only not environmentally friendly, but also causes waste of fuel resources.

Contents of the invention

Aiming at the deficiencies in the prior art, the invention provides an electronically controlled gasoline injector with a heating function that is environmentally friendly, energy-saving, fully combustible, and simple in structure.

In order to achieve the above object, the present invention provides the following technical solutions: an electronically controlled gasoline injector with heating function, including a fuel injector housing, one axial end of the fuel injector housing is the oil inlet end, and the other end is the outlet At the oil end, the injector casing is provided with a guide tube extending to the oil outlet end and has an inner cavity. The coil assembly is installed on the guide tube, and the guide tube is provided with an armature that is linked with the coil assembly and can move back and forth toward the oil outlet end. , the armature is provided with a spring that resists the armature, and the end of the guide tube extending to the oil outlet is provided with an oil outlet, and the oil outlet is provided with a valve seat, and one end of the valve seat is open to the inside of the guide tube, and the other end is connected to the guide tube. The fuel injection port connected to the outside of the guide tube, the fuel injection port is provided with a ball that can be sealed with the fuel injection port, and the fuel injection port of the valve seat is provided with a fuel injection plate with a spray hole in the guide tube, the armature It is linked with the sphere through a guide tube, and there are several fuel inlet ports connected to the inner cavity of the guide tube on the guide tube. A fuel heating and filtering mechanism electrically connected to the heating assembly is erected at the oil inlet end of the casing.

With the above technical scheme, the fuel enters from the fuel inlet end of the injector casing, passes through the coil assembly and the guide tube, and flows from the fuel inlet port of the guide tube to the inner cavity of the guide tube. At this time, the ball and the valve seat In a sealed state, when the coil assembly is energized, the armature overcomes the spring force of the spring against which it is pressed and performs linkage with the guide tube, and the guide tube moves toward the oil inlet end of the injector casing, prompting the ball and the valve seat to release the seal ( The ball and the guide tube can be connected by welding, or can be connected by a connecting piece), the fuel passes through the fuel injection hole of the valve seat, and flows out from the injection hole on the injection sheet. It should be noted that when the fuel is sprayed from the injection hole Spray has been formed; by setting a fuel heating and filtering mechanism at the fuel inlet end of the injector housing that can be electrically connected to the heating component, the fuel is heated and filtered when passing through the fuel heating and filtering mechanism, the temperature of the fuel increases, and the viscosity of the high-temperature fuel on the one hand On the one hand, the saturated vapor pressure increases, which can greatly reduce the fuel spray and accelerate the evaporation speed, thereby improving the cold start performance of the engine and reducing the HC emission of the engine. It is not only environmentally friendly, but also the fuel is fully burned, saving energy. .

The present invention is further configured as follows: the fuel heating and filtering mechanism includes a metal filter cartridge erected at the fuel inlet end of the fuel injector casing, and the metal filter cartridge is clamped at the other end of the guide tube opposite to the end where the oil outlet is set, And the outer peripheral surface of the metal filter cartridge is provided with a plurality of filter holes which can communicate with the inner cavity of the guide tube.

Wherein, the cross-section of the metal filter cartridge is tapered, and one end of the metal filter cartridge facing the oil inlet end of the fuel injector casing is a large end, and the other end is a small end.

With the above technical scheme, the fuel heating and filtering mechanism is set as a metal filter. The metal filter can generate heat after it conducts electricity. After heating, the heat is absorbed by the fuel, which can promote the heating of the fuel. Filter the impurities in the fuel to improve the quality of the fuel, so that the fuel can be fully burned, and at the same time provide protection for the engine. The metal filter cartridge is set in a conical shape, on the one hand, it can increase the injection pressure of the fuel, and on the other hand, it can make the fluidity of the fuel higher.

The present invention is further configured as follows: a sealing ring is provided between the outer peripheral surface of the guide pipe at the oil inlet end of the fuel injector housing and the fuel injector housing.

Adopting the above-mentioned technical scheme, such setting can ensure that the end of the guide pipe located at the oil inlet end of the fuel injector casing is kept sealed between the fuel injector casings to prevent fuel leakage.

The present invention is further set as follows: the fuel injection plate includes a disk, the outer edge of the disk is provided with an annular sealing skirt, the injection hole is opened on the disk, and the annular sealing skirt can be provided with between the inner wall of the guide tube and the outer wall of the valve seat.

Adopting the above technical scheme, this setting can not only make the fuel fully atomized, but also the setting of the annular sealing skirt can ensure the sealing between the guide pipe and the valve seat. On the one hand, it can prevent fuel leakage, and on the other hand, it can ensure the injection of fuel The pressure is not reduced, which improves the spray atomization quality.

The present invention is further provided that: the heating component is a heating wire or a heating rod or a heating film.

By adopting the above-mentioned technical scheme, the setting structure is simple like this, and the installation and disassembly are relatively convenient.

The present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is the enlarged schematic view of part I of Fig. 1;

Fig. 3 is a schematic structural diagram of a metal filter cartridge in an embodiment of the present invention.

Detailed ways

As shown in Figures 1-3, an electronically controlled gasoline injector with heating function includes a fuel injector housing 1, one axial end of the fuel injector housing 1 is the oil inlet end 11, and the other end is the oil outlet end 12, the injector housing 1 is provided with a guide tube 2 extending to the oil outlet 12 and having an inner cavity 21, a coil assembly 3 is installed on the guide tube 2, and a coil assembly 3 is provided in the guide tube 2 and is linked with the coil assembly 3. An armature 31 that can move back and forth toward the oil outlet 12, a spring 32 that resists the armature 31 is provided at the armature 31, an oil outlet 22 is provided at the end of the guide pipe 2 extending to the oil outlet 12, and the oil outlet 22 is provided There is a valve seat 4, and the valve seat 4 is provided with a fuel injection port 41 that is connected to the inside of the guide tube 2 and the other end is connected to the outside of the guide tube 2. The fuel injection port 41 is provided with a seal that can be sealed with the fuel injection port 41 The sphere 5 and the fuel injection port 41 of the valve seat 4 in the guide pipe 2 are provided with a fuel injection plate 6 with an injection hole 61, and the armature 31 and the sphere 5 are linked by a flow guide pipe 7, and the flow guide pipe 7 is set There are several fuel inlets 71 connected to the inner cavity 21 of the guide pipe 2. The fuel injector casing 1 is provided with a heating assembly 8, and the fuel inlet end 11 of the fuel injector casing 1 is provided with an electrical connection with the heating assembly 8. Fuel heating filter mechanism 9. In the above scheme, the fuel enters from the oil inlet end 11 of the injector housing 1, passes through the coil assembly 3 and the guide tube 7, and flows from the fuel inlet 71 of the guide tube 7 to the inner cavity 21 of the guide tube 2, At this time, the ball 5 and the valve seat 4 are in a sealed state. When the coil assembly 3 is energized, the armature 31 overcomes the spring force of the spring 32 pressed against it and performs linkage with the guide tube 7, and the guide tube 7 faces the injector housing 1 The oil inlet port 11 moves in the direction, prompting the ball 5 and the valve seat 4 to unseal (the ball 5 and the guide pipe 7 can be connected by welding, and can also be connected through a connecting piece), and the fuel is routed to the fuel injection port 41 of the valve seat 4 , and flow out from the injection hole 61 on the injection sheet 6. It should be noted that the fuel has formed a spray when it is sprayed out from the injection hole 61; it can be electrically connected to the heating assembly 8 by setting The fuel heating and filtering mechanism 9 makes the fuel heated and filtered when passing through the fuel heating and filtering mechanism 9. The temperature of the fuel increases, the viscosity of the high-temperature fuel decreases on the one hand, and the saturated vapor pressure increases on the one hand, resulting in the fuel spray can be greatly reduced, and at the same time The evaporation speed is accelerated, thereby improving the cold start performance of the engine and reducing the HC emission of the engine, which is not only environmentally friendly, but also the fuel is fully burned to save energy. The heating element in the embodiment of the present invention can be a heating wire, a heating rod or a heating film, all of which are feasible.

In the embodiment of the present invention, the fuel heating and filtering mechanism 9 includes a metal filter cartridge 91 erected at the oil inlet end 11 of the injector housing 1, and the metal filter cartridge 91 is clamped on the guide pipe 2 relative to the oil outlet. At the other end of one end of the port 22, and on the outer peripheral surface of the metal filter cartridge 91, a plurality of filter holes 911 that can communicate with the inner cavity 21 of the guide tube 2 are provided. The fuel oil heating and filtering mechanism 9 is set as a metal filter screen 91, and the metal filter screen 91 can generate heat after being conductive. After heating, the heat is absorbed by the fuel oil, which can promote the heating of the fuel oil. Impurities in the fuel are filtered to improve the quality of the fuel so that the fuel can be fully burned and at the same time protect the engine. The metal filter screen 91 can be processed with iron or copper materials, and conductive materials can be used; in order to increase the injection pressure of the fuel and ensure the fluidity of the fuel, the cross-section of the metal filter cartridge 91 is conical, and the metal filter cartridge 91 is directed towards the injection nozzle. One end of the oil inlet end 11 of the oiler housing 1 is a large end 912 , and the other end is a small end 913 . It should be noted that the metal filter cartridge 91 can be formed by winding a metal wire, or processed by a steel plate, and then opening filter holes 911 on the steel plate.

In order to ensure that the end of the guide pipe 2 located at the fuel inlet end 11 of the injector housing 1 is kept sealed between the injector housings 1 to prevent fuel leakage. A sealing ring 23 is provided between the outer peripheral surface of the guide pipe 2 located at the oil inlet end 11 of the injector housing 1 and the injector housing 1 .

In order to ensure the seal between the guide pipe 2 and the valve seat 4 and prevent fuel leakage, the fuel injection plate 6 includes a disc-shaped body 62, and an annular sealing skirt 63 is provided on the outer edge of the disc-shaped body 62, and the injection hole 61 is opened. On the disc body 62 , an annular sealing skirt 63 can be disposed between the inner wall of the guide tube 2 and the outer wall of the valve seat 4 . It should be noted that it is also feasible to arrange a gasket or a sealing ring between the guide pipe 2 and the valve seat 4 .

Claims (8)

1. An electronically controlled gasoline injector with a heating function, including a fuel injector housing, one axial end of the fuel injector housing is an oil inlet end, and the other end is an oil outlet end, and an extension is installed inside the fuel injector housing. A guide tube with an inner cavity to the oil outlet, a coil assembly is mounted on the guide tube, an armature that is linked with the coil assembly and can move back and forth toward the oil outlet is provided in the guide tube, and a spring that resists the armature is provided at the armature. The end of the guide pipe extending to the oil outlet end is provided with an oil outlet, and the oil outlet is provided with a valve seat, and the valve seat is provided with a fuel injection port with one end connected to the inside of the guide pipe and the other end connected to the outside of the guide pipe. The fuel injection port is provided with a sphere that can be sealed with the fuel injection port, and the fuel injection port on the valve seat is provided with a fuel injection plate with an injection hole in the guide pipe. There are several fuel inlets connected to the inner cavity of the guide tube on the guide tube, and the feature is that: the fuel injector housing is provided with a heating assembly, and the fuel inlet end of the fuel injector housing is provided with a heating assembly Electrically connected fuel heated filter mechanism. 2. The electronically controlled gasoline injector with heating function according to claim 1, characterized in that: the fuel heating and filtering mechanism includes a metal filter cartridge installed at the fuel inlet end of the injector housing, the The metal filter cartridge is clamped on the other end of the guide tube opposite to the end where the oil outlet is provided, and a plurality of filter holes that can communicate with the inner cavity of the guide tube are opened on the outer peripheral surface of the metal filter cartridge. 3. The electronically controlled gasoline injector with heating function according to claim 2, characterized in that: the cross-section of the metal filter cartridge is conical, and the end of the metal filter cartridge faces the oil inlet end of the injector housing One end is big endian, the other end is little endian. 4. The electronically controlled gasoline injector with heating function according to claim 1, 2 or 3, characterized in that: the guide pipe is located between the outer peripheral surface of the fuel inlet end of the injector housing and the injector housing. A sealing ring is provided between them. 5. The electronically controlled gasoline injector with heating function according to claim 1, 2 or 3, characterized in that: the fuel injection plate includes a disc-shaped body, and the outer edge of the disc-shaped body is provided with a ring A ring-shaped sealing skirt, the injection hole is opened on the disc-shaped body, and the annular sealing skirt can be arranged between the inner wall of the guide pipe and the outer wall of the valve seat. 6. The electronically controlled gasoline injector with heating function according to claim 4, characterized in that: the fuel injection plate includes a disc-shaped body, and the outer edge of the disc-shaped body is provided with an annular sealing skirt , the injection hole is set on the disc body, and the annular sealing skirt can be set between the inner wall of the guide pipe and the outer wall of the valve seat. 7. The electronically controlled gasoline injector with heating function according to claim 1 or 2 or 3 or 6, characterized in that: said heating component is a heating wire or a heating rod or a heating film. 8. The electronically controlled gasoline injector with heating function according to claim 4, characterized in that: said heating assembly includes a heating wire, a heating rod or a heating film.