Oil sprayer and engine

Abstract

The utility model provides an oil sprayer and an engine. The needle valve is movably arranged in the needle valve body, opening or closing of an oil way in the needle valve body is controlled through the needle valve, the nozzle body is detachably arranged at the lower end of the needle valve body, so that the oil sprayer sprays oil at the preset angle, and the preset angle is in the air inlet vortex direction of an air cylinder of an engine. According to the oil sprayer, due to the fact that the nozzle body can enable the oil sprayer to spray oil in the air inlet vortex direction of the air cylinder of the engine, fuel can be fully mixed with air, the vortex ratio in the air cylinder can be effectively increased, and the combustion effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a fuel injector and an engine. Background Art

[0002] Engines are divided into diesel engines and gasoline engines. Diesel engines are engines that burn diesel to release energy. The electronically controlled fuel injector is the most critical and complex component in the diesel engine's fuel system. Its function is to control the opening and closing of the solenoid valve according to the control signal sent by the ECU, and then spray the fuel in the high-pressure fuel rail into the diesel engine's combustion chamber through the fuel injector for combustion.

[0003] However, since the spray holes of existing fuel injectors are machined using electrical spark machining, the spray holes are all straight holes, which makes the angle between the oil sprayed by the existing fuel injectors and the direction of the intake vortex large, making it impossible to strengthen the intake vortex and enhance mixing, and thus unable to improve the combustion effect. Utility Model Content

[0004] In view of this, an embodiment of the present invention provides a fuel injector and an engine to solve the problem caused by the large angle between the oil sprayed by the existing fuel injector and the direction of the intake vortex.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The first aspect of the utility model discloses a fuel injector, comprising a needle valve body, a needle valve and a nozzle body;

[0007] The needle valve is arranged in the needle valve body and is used to control the conduction or closing of the oil circuit in the needle valve body;

[0008] The nozzle body is detachably arranged at the lower end of the needle valve body so that the injector can spray oil along a preset angle, wherein the preset angle is the intake vortex direction of the cylinder of the engine.

[0009] Preferably, the needle valve body, the needle valve and the nozzle body are all cylindrical structures.

[0010] Preferably, the needle valve body, the needle valve and the nozzle body are coaxially arranged.

[0011] Preferably, the nozzle body is provided with a plurality of arc-shaped oil passages, wherein the arc-shaped oil passages are connected with the oil passage of the needle valve body.

[0012] Preferably, the nozzle body comprises: a connecting rod and a cone head;

[0013] The lower end of the needle valve body is provided with a tapered cavity which matches the cone head;

[0014] The connecting rod is arranged on the top of the cone head, and the connecting rod is provided with an external thread;

[0015] The lower end of the needle valve body is provided with an internal thread that matches the external thread;

[0016] A flow channel is provided in the axial direction of the connecting rod, and an oil hole which is communicated with the flow channel and the arc-shaped oil channel is provided in the radial direction of the connecting rod.

[0017] Preferably, the conical surface of the cone head is provided with a plurality of arc-shaped oil passages.

[0018] Preferably, a plurality of arc-shaped oil passages are evenly arranged along the circumference of the cone surface of the cone head.

[0019] Preferably, the arc-shaped oil passage bends counterclockwise.

[0020] A second aspect of the present utility model discloses an engine, comprising the injector disclosed in the first aspect of the present utility model.

[0021] As can be seen from the above, the present invention discloses a fuel injector and an engine. A needle valve is movably disposed within the needle valve body, and the needle valve is used to control the opening or closing of the oil circuit within the needle valve body. Furthermore, a nozzle body is detachably disposed at the lower end of the needle valve body, so that the fuel injector sprays fuel along a preset angle, and the preset angle corresponds to the intake swirl direction of the engine cylinder. With the fuel injector disclosed above, since the nozzle body enables the fuel injector to spray fuel along the intake swirl direction of the engine cylinder, thereby allowing the fuel to be fully mixed with the air, the present invention can effectively increase the swirl ratio within the cylinder and improve the combustion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a fuel injector provided in an embodiment of the utility model;

[0024] Figure 2 A partial cross-sectional view of a fuel injector provided by an embodiment of the present utility model;

[0025] Figure 3 Another partial cross-sectional view of the fuel injector provided by an embodiment of the utility model;

[0026] Figure 4 A structural schematic diagram of a nozzle body is provided for an embodiment of the present utility model.

[0027] Among them, the needle valve body 1, the oil inlet 11, the needle valve 2, the nozzle body 3, the connecting rod 31, the cone head 32, the arc-shaped oil channel 33, and the flow channel 34. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In this application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] The utility model embodiment provides a fuel injector, see Figures 1 to 4 , Figure 1 Schematic diagram of the structure of the fuel injector, the fuel injector includes: a needle valve body 1, a needle valve 2 and a nozzle body 3;

[0031] The needle valve 2 is movably arranged in the needle valve body 1 and is used to control the conduction or closing of the oil circuit in the needle valve body 1;

[0032] The nozzle body 3 is detachably arranged at the lower end of the needle valve body 1 so that the injector can spray oil along a preset angle, wherein the preset angle is the intake swirl direction of the cylinder of the engine.

[0033] It should be noted that the needle valve 2 is movably arranged in the needle valve body 1 to control the conduction or closure of the oil circuit entering the needle valve body 1 from the oil inlet 11. When combustion is required in the cylinder of the engine, that is, when the injector is required to spray oil into the cylinder, the needle valve 2 controls the conduction of the oil circuit in the needle valve body 1 to achieve oil injection. When the cylinder needs to discharge exhaust gas, the oil circuit in the needle valve body 1 is closed by controlling the closure, thereby effectively avoiding fuel waste.

[0034] It should also be noted that the organized airflow movement around the cylinder axis formed during the cylinder intake process is the swirl ratio. Increasing the swirl ratio can effectively improve the combustion effect in the cylinder.

[0035] In the embodiment of the present invention, a needle valve 2 is movably disposed within a needle valve body 1, and the needle valve 2 is used to control the opening or closing of the oil circuit within the needle valve body 1. Furthermore, a nozzle body 3 is detachably disposed at the lower end of the needle valve body 1, so that the injector sprays fuel along a preset angle, and the preset angle corresponds to the intake swirl direction of the engine cylinder. With the above-disclosed injector, since the nozzle body 3 enables the injector to spray fuel along the intake swirl direction of the engine cylinder, thereby allowing the fuel to be fully mixed with the air, the present application can effectively increase the swirl ratio within the cylinder and improve the combustion effect.

[0036] Specifically, the needle valve body 1 , the needle valve 2 and the nozzle body 3 are all cylindrical structures.

[0037] It should be noted that the needle valve body 1, needle valve 2 and nozzle body 3 can all be set to cylindrical structures, or they can be set to other types of structures. The needle valve body 1, needle valve 2 and nozzle body 3 can also be set to other types of structures respectively. Those skilled in the art can make a choice according to their needs.

[0038] Specifically, the needle valve body 1 , the needle valve 2 and the nozzle body 3 are coaxially arranged.

[0039] It should be noted that coaxially arranging the needle valve body 1 and the nozzle body 3 can make the nozzle body 3 spray oil into the cylinder more uniformly, and coaxially arranging the needle valve 2 and the needle valve body 1 can reduce the difficulty of assembly and processing and improve assembly efficiency.

[0040] Specifically, the nozzle body 3 is provided with a plurality of arc-shaped oil passages 33 , wherein the arc-shaped oil passages 33 are communicated with the oil passage of the needle valve body 1 .

[0041] It should be noted that by opening a plurality of arc-shaped oil passages 33 in the nozzle body 3 and connecting the arc-shaped oil passages 33 with the oil passage of the needle valve body 1, when the oil passage in the needle valve body 1 is connected, the fuel can flow along the arc-shaped oil passages 33. Finally, after the fuel is ejected, it can form an arc. When a plurality of arc-shaped oil passages 33 eject fuel at the same time, the organized airflow motion around the cylinder axis can be improved to a swirl ratio, so that the fuel can be fully mixed with the air, thereby improving the combustion effect in the cylinder.

[0042] Specifically, the nozzle body 3 includes: a connecting rod 31 and a cone head 32;

[0043] The lower end of the needle valve body 1 is provided with a tapered cavity that cooperates with the cone head 32;

[0044] The connecting rod 31 is arranged on the top of the cone head 32, and the connecting rod 31 is provided with an external thread;

[0045] The lower end of the needle valve body 1 is provided with an internal thread that matches the external thread;

[0046] The cone head 32 is provided with a plurality of arc-shaped oil passages 33;

[0047] A flow passage 34 is defined in the axial direction of the connecting rod 31 , and an oil hole communicating with the flow passage 34 and the arc-shaped oil passage 33 is defined in the radial direction of the connecting rod 31 .

[0048] It should be noted that, by opening a conical cavity that cooperates with the spray cone at the lower end of the needle valve body 1, the connecting rod 31 is arranged at the top of the cone head 32, the connecting rod 31 is provided with an external thread, and the lower end of the needle valve body 1 is provided with an internal thread that cooperates with the external thread, the connecting rod 31 is provided with a flow channel 34 in the axial direction, and the connecting rod 31 is provided with an oil hole that is connected to the flow channel 34 and the arc oil channel 33 in the radial direction. This not only improves the assembly efficiency of the nozzle body 3 and the needle valve body 1, but also ensures that the oil path of the needle valve body 1 is connected to the flow channel 34 and the arc oil channel 33.

[0049] Further, refer to Figure 4 The conical surface of the cone head 32 is provided with a plurality of arc-shaped oil passages 33 .

[0050] It should be noted that by providing a plurality of arc-shaped oil passages 33 on the conical surface, not only the difficulty of machining the arc-shaped oil passages 33 can be reduced, but also the consistency of the plurality of arc-shaped oil passages 33 can be ensured.

[0051] It should also be noted that the present application can open multiple arc-shaped oil channels 33 on the conical surface, or can open multiple arc-shaped oil channels 33 inside the cone head 32. Those skilled in the art can make a choice according to their needs.

[0052] It is worth noting that after the cone head 32 of the present application is installed at the lower end of the needle valve body 1, the conical surface of the cone head 32 cooperates with the needle valve body 1, so that the multiple arc-shaped oil channels 33 do not affect each other, forming separate oil channels.

[0053] Specifically, a plurality of arc-shaped oil passages 33 are evenly arranged along the circumference of the conical surface of the cone head 32 .

[0054] It should be noted that a plurality of arc-shaped oil passages 33 are evenly arranged around the conical surface of the cone head 32, which can further ensure the uniformity of the fuel injector when spraying fuel into the cylinder, thereby improving the mixing effect and ensuring the combustion effect.

[0055] Specifically, the arc-shaped oil passage 33 bends counterclockwise.

[0056] It should be noted that the arc-shaped oil channel 33 can be bent in the counterclockwise direction or the clockwise direction, and those skilled in the art can make the selection according to the direction of the vortex in the cylinder.

[0057] Based on the fuel injector provided in the above embodiment, the embodiment of the present utility model further provides an engine, the engine comprising: a fuel injector;

[0058] The fuel injector includes: a needle valve body 1, a needle valve 2 and a nozzle body 3;

[0059] The needle valve 2 is movably arranged in the needle valve body 1 and is used to control the conduction or closing of the oil circuit in the needle valve body 1;

[0060] The nozzle body 3 is detachably arranged at the lower end of the needle valve body 1 so that the injector can spray oil along a preset angle, wherein the preset angle is the intake swirl direction of the cylinder of the engine.

[0061] In the embodiment of the present invention, a needle valve 2 is movably disposed within a needle valve body 1, and the needle valve 2 is used to control the opening or closing of the oil circuit within the needle valve body 1. Furthermore, a nozzle body 3 is detachably disposed at the lower end of the needle valve body 1, so that the injector sprays fuel along a preset angle, and the preset angle corresponds to the intake swirl direction of the engine cylinder. With the above-disclosed injector, since the nozzle body 3 enables the injector to spray fuel along the intake swirl direction of the engine cylinder, thereby allowing the fuel to be fully mixed with the air, the present application can effectively increase the swirl ratio within the cylinder and improve the combustion effect.

[0062] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel injector suitable for an engine, characterized in that: include: Needle valve bodies, needle valves and nozzle bodies; The needle valve is movably arranged in the needle valve body and is used to control the conduction or closing of the oil circuit in the needle valve body; The nozzle body is detachably arranged at the lower end of the needle valve body so that the injector can spray oil along a preset angle, wherein the preset angle is the intake swirl direction of the cylinder of the engine.

2. The fuel injector according to claim 1, characterized in that The needle valve body, the needle valve and the nozzle body are all cylindrical structures.

3. The fuel injector according to claim 2, characterized in that: The needle valve body, the needle valve and the nozzle body are coaxially arranged.

4. The fuel injector according to claim 1, characterized in that The nozzle body is provided with a plurality of arc-shaped oil passages, wherein the arc-shaped oil passages are communicated with the oil passage of the needle valve body.

5. The fuel injector according to claim 4, characterized in that: The nozzle body comprises: a connecting rod and a cone head; The lower end of the needle valve body is provided with a tapered cavity that cooperates with the cone head; The connecting rod is arranged on the top of the cone head, and the connecting rod is provided with an external thread; The lower end of the needle valve body is provided with an internal thread that matches the external thread; A flow channel is provided in the axial direction of the connecting rod, and an oil hole communicating with the flow channel and the arc-shaped oil channel is provided in the radial direction of the connecting rod.

6. The fuel injector according to claim 5, characterized in that The conical surface of the cone head is provided with a plurality of arc-shaped oil passages.

7. The fuel injector according to claim 6, characterized in that A plurality of arc-shaped oil passages are evenly arranged along the circumference of the cone surface of the cone head.

8. The fuel injector according to claim 6, characterized in that The arc-shaped oil passage bends in a counterclockwise direction.

9. An engine, characterized in that: The fuel injector comprises the fuel injector according to any one of claims 1 to 8.

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