Fuel injector nozzle, fuel injector and engine

Abstract

The utility model discloses an oil sprayer nozzle, an oil sprayer and an engine. The oil sprayer nozzle comprises a nozzle body, a first oil spraying hole is formed in the oil spraying end of the nozzle body; the rotating body is rotatably arranged at the oil injection end, the rotating body is provided with an oil injection cavity communicated with the first oil injection hole, the rotating body is provided with a second oil injection hole communicated with the oil injection cavity, and the end, penetrating through the outer wall of the oil injection cavity, of the second oil injection hole is an oil injection hole outlet; and the oil spraying direction of the oil spraying hole outlet does not pass through the rotating center of the rotating body. Oil jetted from the outlet of the oil spraying hole can give a counter-acting force to the rotating body, a force arm is formed between the counter-acting force and the rotating center of the rotating body, the rotating body rotates, and finally rotary oil spraying of the nozzle of the oil sprayer is achieved. In the oil injection period, rotary oil injection of the rotating body is equivalent to the effect of air inlet vortex in the cylinder, vortex generated by the air inlet channel does not need to be too large, the air inlet amount in the cylinder is guaranteed, and the combustion quality and the engine performance are improved.

Description

Technical Field

[0001] This application relates to the field of engine technology, and more specifically, to an injector nozzle, an injector, and an engine. Background Technology

[0002] With the development of new energy technologies, higher requirements have been placed on the fuel consumption, emissions and reliability of traditional internal combustion engines. At the same time, it is necessary to continuously improve the space utilization rate in the combustion chamber and the uniformity of the distribution of combustible mixture.

[0003] In existing fuel injector designs, when the fuel injector nozzle sprays fuel jets, the fuel jets are diffused along the cylinder axis by the vortex inside the cylinder. The vortex is mainly achieved by the design of the intake port. In order to achieve a larger vortex, the shape of the intake port needs to be designed to be more complex. This will significantly reduce the amount of air entering the cylinder, affect the uniformity of subsequent air-fuel mixing, and ultimately affect the combustion process inside the cylinder, thus hindering the improvement of engine performance.

[0004] Therefore, how to achieve a more uniform fuel-air mixture, improve combustion quality, and thus enhance engine performance without increasing intake swirl is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a fuel injector nozzle that can make the fuel-air mixture more uniform and improve the combustion quality without increasing the intake swirl.

[0006] Another object of this application is to provide an injector and an engine having the above-described injector nozzle.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] The first aspect of this application provides an injector nozzle, comprising:

[0009] The nozzle body has a first spray hole at its spray end;

[0010] A rotating body is rotatably disposed at the fuel injection end. The rotating body has a fuel injection chamber communicating with the first fuel injection hole, and the rotating body has a second fuel injection hole communicating with the fuel injection chamber. One end of the second fuel injection hole that penetrates the outer wall of the fuel injection chamber is the fuel injection hole outlet. The fuel injection direction of the fuel injection hole outlet does not intersect with the rotation center of the rotating body.

[0011] In one possible implementation, the connection point between the injection direction of the injection hole outlet and the inner wall of the injection chamber is a reference point, and the line connecting the reference point and the rotation center of the rotating body is a reference line.

[0012] The angle α between the injection direction at the injection port outlet and the baseline satisfies the condition: 0° < α < 90°.

[0013] In one possible implementation, the angle α between the injection direction at the injection port outlet and the baseline satisfies the condition: 30°≤α≤45°.

[0014] In one possible implementation, the angle β between the injection direction at the injection port outlet and the rotation center of the rotating body satisfies the condition: 0° < β < 90°;

[0015] The second injection hole has one end that penetrates the inner wall of the injection chamber as the injection hole inlet, and the height of the injection hole inlet is higher than the height of the injection hole outlet.

[0016] In one possible implementation, the angle β between the injection direction at the injection port outlet and the rotation center of the rotating body satisfies the condition: 70° < β < 80°.

[0017] In one possible implementation, there are multiple second injection holes, arranged around the rotation center of the rotating body;

[0018] And / or,

[0019] There are multiple first oil injection holes, which are arranged around the rotation center of the rotating body.

[0020] In one possible implementation, each of the second injection holes is evenly arranged along the rotation center of the rotating body;

[0021] Each of the first injection holes is evenly arranged along the rotation center of the rotating body.

[0022] In one possible implementation, the second injection hole extends along a straight line or along a curve.

[0023] In one possible implementation, the rotating body includes an upper cover plate, a lower cover plate, and a sidewall ring disposed between the upper cover plate and the lower cover plate;

[0024] The upper cover plate, the lower cover plate, and the side wall ring form the oil injection chamber, and the second oil injection hole is disposed on the side wall ring.

[0025] In one possible implementation, the upper cover plate, the lower cover plate, and the sidewall ring are an integral structure;

[0026] or,

[0027] The upper cover plate, the lower cover plate, and the side wall ring are separate structures connected by welding or fasteners.

[0028] In one possible implementation, the upper cover plate is provided with an upper cover plate mounting hole, and the lower cover plate is provided with a lower cover plate mounting hole;

[0029] The upper cover plate mounting hole and the lower cover plate mounting hole are rotatably fitted onto the oil injection end.

[0030] In one possible implementation, the upper cover plate, the lower cover plate, and the sidewall ring are all circular.

[0031] In one possible implementation, the fuel injection end is provided with a connecting portion, the fuel injection end is provided with a limiting portion at the upper part of the first fuel injection hole, and the fuel injection end is provided with a limiting member at the lower part of the first fuel injection hole that is detachably connected to the connecting portion, thereby axially limiting the rotating body on the fuel injection end by the limiting portion and the limiting member.

[0032] In one possible implementation, the limiting member includes a screw portion and a limiting plate portion located at one end of the screw portion, and the connecting portion is a threaded hole that mates with the screw portion. The limiting portion and the limiting plate portion axially limit the rotating body to the oil injection end.

[0033] The fuel injector nozzle provided in this application has a rotating body fitted onto the fuel injection end of the nozzle body. The rotating body has a fuel injection chamber and a second fuel injection hole communicating with the fuel injection chamber. Fuel sprayed from the nozzle body enters the fuel injection chamber, and under the fuel injection pressure of the nozzle body, the fuel in the fuel injection chamber is sprayed out through the second fuel injection hole. The fuel injection direction at the outlet of the fuel injection hole does not intersect with the rotation center of the rotating body; that is, the extension direction of the fuel jet sprayed through the fuel injection hole outlet does not pass through the rotation center of the rotating body. This results in the fuel jet sprayed from the fuel injection hole outlet exerting a reaction force on the rotating body. This reaction force does not pass through the rotation center of the rotating body, thus forming a lever arm between the two, thereby generating a torque to drive the rotating body to rotate, ultimately achieving the rotating fuel injection of the fuel injector nozzle. This application enables the rotating fuel injection of the rotating body during fuel injection to achieve the effect of an in-cylinder intake vortex, so that the vortex generated by the intake manifold does not need to be too large, ensuring the in-cylinder intake volume and improving combustion quality and engine performance.

[0034] A second aspect of this application provides an injector that includes an injector nozzle as described in any of the preceding claims.

[0035] The injector provided in this application has the aforementioned injector nozzle, and therefore possesses all the technical effects of the aforementioned injector nozzle, which will not be repeated here.

[0036] A third aspect of this application provides an engine that includes the injector described above.

[0037] The engine provided in this application has the aforementioned injector, and therefore possesses all the technical effects of the aforementioned injector, which will not be repeated here. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the injector nozzle disclosed in an embodiment of this application at a certain angle;

[0040] Figure 2 This is a schematic diagram of the injector nozzle disclosed in an embodiment of this application from another angle.

[0041] Figure 3 This is a schematic diagram of the nozzle body disclosed in the embodiments of this application;

[0042] Figure 4 This is a cross-sectional view of the nozzle body disclosed in an embodiment of this application;

[0043] Figure 5 This is a schematic diagram of the structure of the rotating body disclosed in the embodiments of this application;

[0044] Figure 6 This is a cross-sectional view of the rotating body disclosed in the embodiments of this application;

[0045] Figure 7 This is a schematic diagram of the structure of the limiting member disclosed in the embodiments of this application;

[0046] Figure 8 This is a cross-sectional view of the injector nozzle disclosed in the embodiments of this application;

[0047] Figure 9 This is a diagram illustrating the rotation direction and vortex direction of the rotating body disclosed in the embodiments of this application;

[0048] Figure 10 This is a diagram illustrating the included angle α of the rotating body disclosed in the embodiments of this application;

[0049] Figure 11 This is a diagram illustrating the included angle β of the rotating body disclosed in the embodiments of this application.

[0050] The meanings of the various reference numerals in the figure are as follows:

[0051] 100- Nozzle body; 101- Injection end; 102- Connecting part; 103- First injection hole; 104- Limiting part; 105- Needle valve chamber;

[0052] 200 - Rotating body; 201 - Upper cover plate; 2011 - Upper cover plate mounting hole; 202 - Side wall ring; 203 - Lower cover plate; 2031 - Lower cover plate mounting hole; 204 - Second injection hole; 2041 - Injection hole outlet; 2042 - Injection hole inlet; 205 - Injection chamber; 206 - Injection direction; 207 - Rotation center; 208 - Baseline;

[0053] 300 - Limiting component; 301 - Limiting plate section; 302 - Screw section;

[0054] 400-needle valve. Detailed Implementation

[0055] This application discloses an injector nozzle that can make the fuel-air mixture more uniform and improve the combustion quality without increasing the intake swirl.

[0056] This application also discloses an injector and an engine having the above-described injector nozzle.

[0057] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0058] Diesel engines employ a combination of premixed and diffusion combustion, with diffusion combustion being the dominant process. Therefore, the uniformity of the air-fuel mixture distribution is crucial to engine performance. In traditional combustion systems, the fuel jet injected by the injector is diffused circumferentially within the cylinder by an intake swirl. This swirl is primarily achieved through the design of the intake manifold shape. Furthermore, to achieve a more uniform fuel-air mixture, a larger intake swirl is required, necessitating a more complex intake manifold shape. This complex intake manifold shape significantly reduces the amount of air entering the cylinder, impacting subsequent combustion processes.

[0059] Based on this, this application discloses a fuel injector nozzle that can achieve more uniform fuel-air mixing and improve combustion quality without increasing intake air swirl. Figure 1 and Figure 2 As shown in the embodiment of this application, the injector nozzle disclosed includes a nozzle body 100 and a rotating body 200.

[0060] like Figure 3As shown, the injector body 100 has a first injection port 103 at its injection end 101. The injection end 101 refers to the downstream end of the injector body 100 along the injection direction. Fuel is injected out of the injector body 100 through the first injection port 103.

[0061] like Figure 5 , Figure 6 and Figure 8 As shown, the rotating body 200 is rotatably mounted on the fuel injection end 101 and can rotate around the axis of the fuel injection end 101. For example, the rotating body 200 can be fitted onto the fuel injection end 101 with a clearance fit to achieve a rotational fit with the fuel injection end 101. It should be noted that the rotating body 200 can also be rotatably fitted onto the fuel injection end 101 through other intermediate parts, as long as the rotating body 200 can rotate along the fuel injection end 101 when subjected to rotational torque.

[0062] The rotating body 200 has an oil injection chamber 205 that communicates with the first oil injection hole 103. When the rotating body 200 is rotated and fitted to the oil injection end 101 of the nozzle body 100, the oil jet ejected from the nozzle body 100 through the first oil injection hole 103 can enter the oil injection chamber 205.

[0063] The rotating body 200 has a second injection hole 204 communicating with the injection chamber 205. One end of the second injection hole 204 that penetrates the outer wall of the injection chamber 205 is the injection hole outlet 2041. The oil jet ejected from the first injection hole 103 enters the injection chamber 205 and fills the injection chamber 205. When the first injection hole 103 injects oil again, the injection pressure of the nozzle body 100 acts on the fuel in the injection chamber 205, forcing the fuel in the injection chamber 205 out through the second injection hole 204 to form a jet-shaped oil jet.

[0064] To prevent fuel leakage at the connection between the rotating body 200 and the nozzle body 100, the rotating body 200 and the nozzle body 100 are movably sealed together, for example, by a mechanical seal. Specifically, a dynamic sealing ring can be provided on the rotating body 200, and a static sealing ring can be provided on the injection end 101. The end faces of the dynamic sealing ring and the static sealing ring are in contact to form a liquid film lubrication. It should be noted that the dynamic sealing structure between the rotating body 200 and the nozzle body 100 can be any of the dynamic sealing structures used in the prior art, and is not limited to the mechanical seal structure disclosed in the above embodiments.

[0065] The fuel jet ejected from the fuel injection port outlet 2041 radiates outward along the straight extension direction of the fuel injection port outlet 2041. Based on this, as... Figure 10 and Figure 11As shown, in this embodiment, the injection direction 206 of the injection port outlet 2041 does not intersect with the rotation center 207 of the rotating body 200. That is, the extension direction of the oil jet ejected through the injection port outlet 2041 does not pass through the rotation center 207 of the rotating body 200. Figure 9 As shown, the oil jet ejected from the oil injection port outlet 2041 will exert a reaction force on the rotating body 200. This reaction force does not pass through the rotation center 207 of the rotating body 200, so it will form a lever arm with the rotation center 207 of the rotating body 200. In this way, a torque can be generated to drive the rotating body 200 to rotate, so that the rotating body 200 rotates, and finally realizes the rotational oil injection of the injector nozzle.

[0066] It should be noted that the fuel jet ejected from the fuel injection port outlet 2041 causes the rotating body 200 to rotate in the corresponding direction. The rotation direction of the rotating body 200 can be opposite to the rotation direction of the intake swirl in the cylinder to enhance the fuel-air mixing effect. Those skilled in the art can select the fuel injection direction of the fuel injection port outlet 2041 according to their needs, and then select the rotation direction of the rotating body 200. The embodiments of this application do not limit the rotation direction of the rotating body 200.

[0067] This application enables the rotating body 200 to achieve the effect of an in-cylinder intake swirl during fuel injection, thereby improving the uniformity of the air-fuel mixture. The requirements for the swirl generated in the intake manifold are not high; that is, the swirl generated by the intake manifold does not need to be too large, ensuring sufficient in-cylinder intake volume and improving combustion quality and engine performance.

[0068] like Figure 10 As shown, for ease of understanding, the connection point between the injection direction 206 of the injection port outlet 2041 and the inner wall of the injection chamber 205 is defined as the reference point, and the line connecting the reference point and the rotation center 207 of the rotating body 200 is defined as the reference line 208.

[0069] The angle α between the injection direction 206 of the fuel injector outlet 2041 and the reference line 208 satisfies the condition: 0° < α < 90°. Designing the angle α to be greater than 0° ensures that the injection direction 206 of the fuel injector outlet 2041 does not intersect with the rotation center 207 of the rotating body 200, so that the force generated by the fuel jet ejected from the fuel injector outlet 2041 can drive the rotating body 200 to rotate. Designing the angle α to be less than 90° ensures that the path of the second fuel injector 204 is not too long, and further utilizes the arrangement of the second fuel injector 204 on the rotating body 200.

[0070] By changing the included angle α, the lever arm of the reaction force exerted by the fuel jet ejected from the injection port outlet 2041 on the rotating body 200 can be altered, thereby changing the angular velocity of the rotating body 200. If the included angle α increases, the angular velocity of the rotating body 200 increases; if the included angle α decreases, the angular velocity of the rotating body 200 decreases. When the angular velocity of the rotating body 200 increases, too much of the total energy of the fuel injection is converted into the kinetic energy of the rotating body 200, resulting in a decrease in the final injected fuel pressure, but it can better achieve the equivalent in-cylinder vortex effect. When the angular velocity of the rotating body 200 decreases, the rotating body 200 rotates too slowly and cannot fully utilize the equivalent vortex effect during the fuel injection process, but it can save kinetic energy, resulting in an increase in the injected fuel pressure.

[0071] Based on this, the embodiment of this application can select the size of the included angle α based on the required angular velocity of the rotating body 200. In this embodiment, the included angle α between the injection direction 206 of the injection port outlet 2041 and the reference line 208 satisfies the condition: 30°≤α≤45°. For example, the included angle α can be 30°, 35°, 40°, 45°, etc. Simulation verification shows that when the included angle α is controlled within the range of 30°~45°, the rotating body 200 can obtain a more suitable angular velocity, ensuring that the rotating body 200 obtains a more balanced fuel pressure and equivalent vortex effect.

[0072] like Figure 11 As shown, the angle β between the injection direction 206 of the injection port outlet 2041 and the rotation center 207 of the rotating body 200 satisfies the condition: 0°<β<90°. That is, the injection direction 206 of the injection port outlet 2041 forms an acute angle with the rotation center 207 of the rotating body 200.

[0073] The second injection hole 204 has one end that penetrates the inner wall of the injection chamber 205, which is the injection hole inlet 2042. The height of the injection hole inlet 2042 is higher than the height of the injection hole outlet 2041, so that the oil jet ejected from the second injection hole 204 is sprayed out at a downward angle. The included angle β is designed to be greater than 0°, so that the injection direction 206 of the injection hole outlet 2041 is not parallel to the rotation center 207 of the rotating body 200, to prevent the oil jet from being too concentrated; the included angle β is designed to be less than 90°, so that the injection direction 206 of the injection hole outlet 2041 is not perpendicular to the rotation center 207 of the rotating body 200, to prevent the oil jet from being too diffused. In this embodiment, the included angle β is designed as an acute angle, which allows the oil jet to be sprayed at a downward angle. By designing the value of the included angle β, the size of the injector cone angle (i.e., 2β) can be changed.

[0074] Furthermore, the angle β between the injection direction 206 of the injection port outlet 2041 and the rotation center 207 of the rotating body 200 satisfies the condition: 70° < β < 80°. For example, the angle β can be 70°, 72°, 74°, 76°, 78°, or 80°. Simulation verification shows that controlling the angle β within the range of 70° to 80° achieves a better oil-air mixing effect.

[0075] like Figure 6 As shown, there are multiple second fuel injection holes 204, arranged around the rotation center 207 of the rotating body 200. The number of second fuel injection holes 204 can be an even number, such as 4, 6, 8, or 10, or an odd number, such as 3, 5, 7, or 9. This embodiment does not limit the specific number of second fuel injection holes 204. Each second fuel injection hole 204 can be designed to be evenly arranged along the rotation center 207 of the rotating body 200.

[0076] It should be noted that the injection outlets 2041 of each of the second injection holes 204 can be arranged at the same axial height of the rotating body 200, or at different axial heights of the rotating body 200. Alternatively, each of the second injection holes 204 can be divided into multiple parts, with the injection outlets 2041 of the second injection holes 204 in the same part arranged at the same axial height of the rotating body 200, and the injection outlets 2041 of the second injection holes 204 in different parts arranged at different axial heights of the rotating body 200.

[0077] Taking a rotating body 200 with eight second oil injection holes 204 as an example, the first, third, fifth, and seventh second oil injection holes 204 are the first part of the oil injection holes, and the second, fourth, sixth, and eighth second oil injection holes 204 are the second part of the oil injection holes. The first part oil injection holes and the second part oil injection holes are arranged sequentially at intervals, and the first part oil injection holes and the second part oil injection holes are arranged at different axial heights of the rotating body 200. The first part oil injection holes are arranged at the same axial height of the rotating body 200, and the second part oil injection holes are arranged at the same axial height of the rotating body 200.

[0078] The included angle α corresponding to the injection outlet 2041 of each of the second injection holes 204 can be designed to be the same or different. Alternatively, each of the second injection holes 204 can be divided into multiple parts, with the included angle α corresponding to the injection outlet 2041 of the second injection holes 204 in the same part being designed to be the same, and the included angle α corresponding to the second injection holes 204 in different parts being designed to be different.

[0079] Taking a rotating body 200 with eight second oil injection holes 204 as an example, the first, third, fifth, and seventh second oil injection holes 204 constitute the first part of the oil injection holes, and the second, fourth, sixth, and eighth second oil injection holes 204 constitute the second part of the oil injection holes. The first part oil injection holes and the second part oil injection holes are arranged sequentially at intervals. The included angle α between the first part oil injection holes and the second part oil injection holes is designed to be different, the included angle α between the first part oil injection holes is designed to be the same, and the included angle α between the second part oil injection holes is designed to be the same.

[0080] The included angle β corresponding to the injection port outlet 2041 of each of the second injection ports 204 can be designed to be the same or different. Alternatively, each of the second injection ports 204 can be divided into multiple parts, with the included angle β corresponding to the injection port outlet 2041 of the second injection ports 204 in the same part being designed to be the same, and the included angle β corresponding to the second injection ports 204 in different parts being designed to be different.

[0081] Taking a rotating body 200 with eight second oil injection holes 204 as an example, the first, third, fifth, and seventh second oil injection holes 204 constitute the first part of the oil injection holes, and the second, fourth, sixth, and eighth second oil injection holes 204 constitute the second part of the oil injection holes. The first part oil injection holes and the second part oil injection holes are arranged sequentially at intervals. The included angle β corresponding to the first part oil injection holes and the second part oil injection holes is designed to be different, the included angle β corresponding to each first part oil injection hole is designed to be the same, and the included angle β corresponding to each second part oil injection hole is designed to be the same.

[0082] like Figure 3 and Figure 4 As shown, there can be multiple first injection holes 103, arranged around the rotation center 207 of the rotating body 200. Specifically, each first injection hole 103 is evenly arranged along the rotation center 207 of the rotating body 200. When multiple first injection holes 103 are provided and evenly arranged along the rotation center 207 of the rotating body 200, fuel can be evenly injected into the injection chamber 205, thereby evenly spraying the fuel in the injection chamber 205 out through the second injection hole 204.

[0083] This embodiment does not limit the shape of the second injection hole 204; it can be a straight hole or a curved hole, meaning the second injection hole 204 can extend along a straight line or a curve. The cross-section of the second injection hole 204 can be circular or other shapes, such as square or elliptical, etc., which will not be listed in this embodiment. Correspondingly, the cross-section of the first injection hole 103 can be circular or other shapes, such as square or elliptical, etc., which will not be listed in this embodiment.

[0084] like Figure 5 and Figure 6As shown in a specific embodiment of this application, the rotating body 200 includes an upper cover plate 201, a lower cover plate 203, and a sidewall ring 202 arranged between the upper cover plate 201 and the lower cover plate 203.

[0085] The upper cover plate 201, the lower cover plate 203, and the side wall ring 202 form an oil injection chamber 205. The upper cover plate 201, the lower cover plate 203, and the side wall ring 202 can be an integral structure or a separate structure connected by welding or fasteners. In this embodiment, the fixing method between the upper cover plate 201, the lower cover plate 203, and the side wall ring 202 is not limited, as long as the oil injection chamber 205 can be formed.

[0086] Since the oil jet ejected from the rotating body 200 radiates outward around the rotation center 207 of the rotating body 200, it is easier to obtain a swirling oil jet by setting the second injection hole 204 on the sidewall ring 202. The sidewall ring 202 can have a large thickness (i.e., the distance between the inner and outer rings of the sidewall ring 202 is the thickness of the sidewall ring 202), making it easier to machine the second injection hole 204, so that the second injection hole 204 has a sufficient extension path to guide the fuel to form a corresponding injection angle.

[0087] Alternatively, the second fuel injection hole 204 can be arranged on the lower cover plate 203, but the lower cover plate 203 needs to have a large thickness to ensure that the second fuel injection hole 204 has a sufficient extension path to guide the fuel to form the corresponding injection angle.

[0088] The upper cover plate 201 has an upper cover plate mounting hole 2011, and the lower cover plate 203 has a lower cover plate mounting hole 2031. The upper cover plate mounting holes 2011 and 2031 are rotatably fitted onto the fuel injection end 101. The diameters of the upper cover plate mounting holes 2011 and 2031 can be the same or different. If the diameters of the upper cover plate mounting holes 2011 and 2031 are designed to be different, since the rotating body 200 is fitted into the fuel injection end 101 from the lower end, the diameter of the upper cover plate mounting hole 2011 should be larger than the diameter of the lower cover plate mounting hole 2031 to ensure proper fitting. Correspondingly, the fuel injection end 101 should also be designed as a stepped shaft structure, with the upper shaft section that mates with the upper cover plate mounting hole 2011 having a larger outer diameter, and the lower shaft section that mates with the lower cover plate mounting hole 2031 having a smaller outer diameter.

[0089] The upper cover plate 201, lower cover plate 203, and side wall ring 202 can all be circular. That is, the outer contour of the rotating body 200 is cylindrical. This arrangement ensures that the distance from each oil injection port outlet 2041 to the rotation center 207 of the rotating body 200 (i.e., the axis of the rotating body 200) is the same, so that the oil jets ejected from each oil injection port outlet 2041 have the same starting point and essentially the same injection pressure. Of course, the outer contour of the rotating body 200 can also be other shapes, and is not limited to the cylindrical shape.

[0090] like Figure 8 As shown in a specific embodiment of this application, the nozzle body 100 has a connecting portion 102 at the oil injection end 101, a limiting portion 104 at the upper part of the first oil injection hole 103, and a limiting member 300 detachably connected to the connecting portion 102 at the lower part of the first oil injection hole 103.

[0091] When installing the rotating body 200, the limiting member 300 needs to be removed from the injection end 101 so that the rotating body 200 can be fitted onto the injection end 101. After the rotating body 200 is fitted onto the injection end 101, the limiting member 300 is then fixed to the connecting part 102, so that the limiting part 104 and the limiting member 300 can axially limit the rotating body 200 on the injection end 101. That is, the upper end of the rotating body 200 abuts against the limiting part 104, and the lower end abuts against the limiting member 300, thereby restricting the axial movement of the rotating body 200.

[0092] Those skilled in the art will understand that the limiting member 300 and the fuel injection end 101 can also be designed as non-removable structures. For example, when the rotating body 200 is sleeved on the fuel injection end 101, the limiting member 300 can be welded to the fuel injection end 101, which can also realize the installation of the rotating body 200 and restrict the axial movement of the rotating body 200.

[0093] Specifically, such as Figure 7 As shown, the limiting member 300 may include a screw portion 302 and a limiting plate portion 301 located at one end of the screw portion 302. Based on this, the connecting portion 102 may be a threaded hole that mates with the screw portion 302. When installing the rotating body 200, the limiting member 300 needs to be removed from the injection end 101 so that the rotating body 200 can be fitted onto the injection end 101. Then, the screw portion 302 mates with the threaded hole, and the limiting member 300 is rotated until the limiting portion 104 and the limiting plate portion 301 axially limit the rotating body 200 on the injection end 101.

[0094] Those skilled in the art will understand that a threaded hole can also be provided on the limiting member 300, and the connecting part 102 can be designed as a screw part that mates with the threaded hole of the limiting member 300, which can also achieve the above-mentioned limiting function.

[0095] In addition, the limiting component 300 can also be fixed to the oil injection end 101 by fasteners such as bolts to achieve axial limiting of the rotating body 200.

[0096] like Figure 4 and Figure 8 As shown in the illustration, this application also discloses a fuel injector, which includes the fuel injector nozzle disclosed in the above embodiment. The nozzle body 100 has a needle valve chamber 105, within which a needle valve 400 is disposed, controlling the fuel injection process. The fuel injector disclosed in this application, having the aforementioned fuel injector nozzle, possesses all the technical effects of the aforementioned fuel injector nozzle, which will not be elaborated upon further here.

[0097] This application also discloses an engine that includes the fuel injector disclosed in the above embodiments. The engine provided in this application, having the aforementioned fuel injector, possesses all the technical effects of the aforementioned fuel injector, which will not be elaborated upon further here.

[0098] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0099] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0100] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0101] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An oil injector tip, characterized by, include: The nozzle body (100) has a first oil injection hole (103) at the oil injection end (101). A rotating body (200) is rotatably disposed on the fuel injection end (101). The rotating body (200) has a fuel injection chamber (205) communicating with the first fuel injection hole (103), and the rotating body (200) has a second fuel injection hole (204) communicating with the fuel injection chamber (205). One end of the second fuel injection hole (204) that penetrates the outer wall of the fuel injection chamber (205) is a fuel injection hole outlet (2041). The fuel injection direction (206) of the fuel injection hole outlet (2041) does not intersect with the rotation center (207) of the rotating body (200).

2. The injector tip of claim 1, wherein The connection point between the injection direction (206) of the injection port outlet (2041) and the inner wall of the injection chamber (205) is the reference point, and the line connecting the reference point and the rotation center (207) of the rotating body (200) is the reference line (208). The angle α between the injection direction (206) of the injection port outlet (2041) and the baseline (208) satisfies the condition: 0° < α < 90°.

3. The injector tip of claim 2, wherein The angle α between the injection direction (206) of the injection port outlet (2041) and the baseline (208) satisfies the condition: 30°≤α≤45°.

4. The injector tip of claim 1 wherein, The angle β between the injection direction (206) of the injection port outlet (2041) and the rotation center (207) of the rotating body (200) satisfies the condition: 0°<β<90°; The second injection hole (204) has one end that penetrates the inner wall of the injection chamber (205) as the injection hole inlet (2042), and the height of the injection hole inlet (2042) is higher than the height of the injection hole outlet (2041).

5. The injector tip of claim 4 wherein, The angle β between the injection direction (206) of the injection port outlet (2041) and the rotation center (207) of the rotating body (200) satisfies the condition: 70° < β < 80°.

6. The injector tip of any one of claims 1-5, wherein, There are multiple second oil injection holes (204), which are arranged around the rotation center (207) of the rotating body (200); And / or, There are multiple first oil injection holes (103), which are arranged around the rotation center (207) of the rotating body (200).

7. The injector tip of claim 6 wherein, Each of the second oil injection holes (204) is evenly arranged along the rotation center (207) of the rotating body (200); Each of the first oil injection holes (103) is evenly arranged along the rotation center (207) of the rotating body (200).

8. The injector tip of any one of claims 1-5, wherein, The second injection hole (204) extends along a straight line or along a curve.

9. The injector tip of any one of claims 1-5, wherein, The rotating body (200) includes an upper cover plate (201), a lower cover plate (203), and a side wall ring (202) disposed between the upper cover plate (201) and the lower cover plate (203). The upper cover plate (201), the lower cover plate (203), and the side wall ring (202) form the oil injection chamber (205), and the second oil injection hole (204) is disposed on the side wall ring (202).

10. The injector tip of claim 9 wherein, The upper cover plate (201), the lower cover plate (203), and the side wall ring (202) are an integral structure; or, The upper cover plate (201), the lower cover plate (203), and the side wall ring (202) are a split structure connected by welding or fasteners.

11. The injector tip of claim 9 wherein, The upper cover plate (201) is provided with an upper cover plate mounting hole (2011), and the lower cover plate (203) is provided with a lower cover plate mounting hole (2031). The upper cover plate mounting hole (2011) and the lower cover plate mounting hole (2031) are rotatably fitted onto the oil injection end (101).

12. The injector tip of claim 9 wherein, The upper cover plate (201), the lower cover plate (203), and the side wall ring (202) are all circular.

13. The injector tip of any one of claims 1-5, wherein The oil injection end (101) is provided with a connecting part (102). The oil injection end (101) is provided with a limiting part (104) at the upper part of the first oil injection hole (103). The oil injection end (101) is provided with a limiting member (300) detachably connected to the connecting part (102) at the lower part of the first oil injection hole (103). The rotating body (200) is axially limited on the oil injection end (101) by the limiting part (104) and the limiting member (300).

14. The injector tip of claim 13, wherein The limiting member (300) includes a screw part (302) and a limiting plate part (301) located at one end of the screw part (302). The connecting part (102) is a threaded hole that mates with the screw part (302). The limiting part (104) and the limiting plate part (301) axially limit the rotating body (200) on the oil injection end (101).

15. An oil injector characterized by Including the injector nozzle as described in any one of claims 1-14.

16. An engine characterized by, Including the injector as described in claim 15.

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