Automobile oil nozzle valve seat

Abstract

The utility model relates to the technical field of automobile oil nozzles, in particular to an automobile oil nozzle valve seat which comprises a hollow seat body and an installation assembly, the installation assembly comprises an oil nozzle body and a sealing gasket, a containing groove matched with the bottom end of the oil nozzle body is formed in the top of the hollow seat body, and the oil nozzle body is detachably connected with the hollow seat body. The bottom end of the oil nozzle body is located in the containing groove, the sealing gasket is in interference fit with the hollow seat body and fixedly arranged on the outer side of the oil nozzle body, an oil inlet is formed in the position, connected with the containing groove, in the hollow seat body, an oil spraying cavity is formed in the oil nozzle body, and the oil spraying cavity is communicated with the oil inlet. Due to the fact that the hollow pipe type seat body is arranged and the sealing gasket is arranged, the oil nozzle body can be installed in the hollow pipe type seat body in a sealing mode, the oil nozzle body and the hollow pipe type seat body can be well sealed, and the phenomenon that oil drips at the connecting position of the oil nozzle body and the hollow pipe type seat body is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile fuel injection nozzles, and in particular relates to a valve seat for an automobile fuel injection nozzle. Background Art

[0002] The automobile fuel injector is a simple solenoid valve. When the electromagnetic coil is energized, suction is generated, the needle valve is sucked up, the spray hole is opened, and the fuel is sprayed out at high speed through the annular gap between the needle pin at the needle valve head and the spray hole to form a mist to facilitate full combustion. The valve seat structure design of existing automobile fuel injectors is unreasonable, the assembly consistency is poor, the product oil volume is uneven, and the oil control effect is poor, which will affect the product qualification rate and service life.

[0003] Prior art CN206346860U discloses a valve seat for an automobile fuel injector, comprising a hollow tubular seat body and an assembly boss, and the hollow tubular seat body is connected to the fuel injector. The valve seat structure of the automobile fuel injector of the application is reasonably designed, the assembly consistency is good, the product oil volume is uniform, the oil control effect is good, the product qualification rate is improved, and the service life is extended.

[0004] When the fuel injector is used, it is necessary to install the fuel injector on the valve seat, but the hollow tubular seat body used above is not provided with a mounting sealing structure, resulting in that the fuel injector cannot be stably installed in the hollow tubular seat body. Utility Model Content

[0005] The utility model aims to provide a fuel injection nozzle valve seat for an automobile, which is intended to enable the fuel injection nozzle to be sealed in a hollow tubular seat body, so that the fuel injection nozzle and the hollow tubular seat body can be well sealed, thereby avoiding the phenomenon of oil dripping at the connection between the fuel injection nozzle and the hollow tubular seat body.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] The utility model provides a fuel injector valve seat for an automobile, comprising a hollow seat body and a mounting assembly, wherein the mounting assembly comprises a fuel injector body and a sealing gasket, the top of the hollow seat body is provided with a receiving groove matched with the bottom end of the fuel injector body, the fuel injector body is detachably connected to the hollow seat body, the bottom end of the fuel injector body is located in the receiving groove, the sealing gasket is interference fit with the hollow seat body and is fixedly arranged on the outside of the fuel injector body, an oil inlet is arranged at the connection between the hollow seat body and the receiving groove, a fuel injection cavity is arranged in the fuel injector body, the fuel injection cavity is communicated with the oil inlet, and the fuel in the fuel injection cavity of the fuel injector body is transmitted to the oil inlet of the hollow seat body.

[0008] Wherein, the sealing gasket is made of NBR nitrile rubber.

[0009] The hollow seat body has an internal thread, the fuel injector body has an external thread, and the hollow seat body and the fuel injector body are connected via threads to achieve a detachable connection between the fuel injector body and the hollow seat body.

[0010] Among them, an oil spray hole and a truncated cone hole are sequentially arranged from top to bottom on the side of the oil inlet away from the containing groove, and the containing groove, the oil inlet, the oil spray hole and the truncated cone hole are sequentially connected.

[0011] The number of the oil injection holes and the number of the truncated cone-shaped holes are the same, and the number of the oil injection holes and the number of the truncated cone-shaped holes are at least two.

[0012] The oil injection holes and the truncated cone-shaped holes are distributed in the hollow seat body in a ring array.

[0013] The top of the fuel injection nozzle is provided with a receiving groove which is matched with the bottom end of the fuel injection nozzle body, the fuel injection nozzle body is detachably connected to the hollow seat body, the bottom end of the fuel injection nozzle body is located in the receiving groove, the sealing gasket is interference fit with the hollow seat body and is fixedly arranged on the outer side of the fuel injection nozzle body, and an oil inlet is provided in the hollow seat body at the connection with the receiving groove, and an oil injection cavity is provided in the fuel injection nozzle body, and the oil injection cavity is communicated with the oil inlet, so that the fuel in the oil injection cavity of the fuel injection nozzle body is transmitted to the oil inlet of the hollow seat body. By making the hollow seat body detachably connected to the fuel injection nozzle body and providing the sealing gasket, the fuel injection nozzle body can be sealed and installed in the hollow tubular seat body, so that the fuel injection nozzle body and the hollow tubular seat body can be well sealed, thereby avoiding the phenomenon of oil dripping at the connection between the fuel injection nozzle body and the hollow tubular seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the automobile fuel injection nozzle valve seat of the first embodiment of the utility model.

[0016] Figure 2 It is a cross-sectional schematic diagram of a valve seat of an automobile fuel injection nozzle along a sealing gasket according to the first embodiment of the utility model.

[0017] Figure 3 It is a schematic diagram of a first embodiment of the utility model of a fuel injection nozzle valve seat for an automobile along a hollow seat body.

[0018] Figure 4It is a disassembly schematic diagram of the hollow seat body of the automobile fuel injection nozzle valve seat and the fuel injection nozzle body according to the first embodiment of the utility model.

[0019] In the figure: 101-hollow seat body, 102-injection nozzle body, 103-sealing gasket, 104-accommodation groove, 105-oil inlet, 106-injection chamber, 107-injection hole, 108-truncated cone hole. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] First embodiment

[0022] See also Figure 1 to Figure 4 , Figure 1 This is a schematic diagram of the overall structure of the automobile fuel injection nozzle valve seat of the first embodiment of the utility model. Figure 2 1 is a cross-sectional schematic diagram of the automobile fuel injection nozzle valve seat along the sealing gasket 103 of the first embodiment of the utility model, Figure 3 1 is a schematic diagram of a first embodiment of the present utility model of a fuel injection nozzle valve seat for automobiles along a hollow seat body 101. Figure 4 It is a disassembly diagram of the hollow seat body 101 of the automobile fuel injection nozzle valve seat and the fuel injection nozzle body 102 according to the first embodiment of the utility model.

[0023] The utility model provides a fuel injector valve seat for automobiles: comprising a hollow seat body 101 and a mounting assembly, wherein the mounting assembly comprises a fuel injector body 102 and a sealing gasket 103. The above-mentioned solution solves the problem that the above-mentioned hollow tubular seat body is not provided with a mounting sealing structure, resulting in the fuel injector being unable to be stably mounted in the hollow tubular seat body. It can be understood that the above-mentioned solution can be used in the scenario where the fuel injector for automobiles is used.

[0024] In this embodiment, the mounting assembly is arranged on the inner side of the hollow seat body 101, and is used to seal the fuel injector body 102 in the hollow tubular seat body, so that the fuel injector body 102 and the hollow tubular seat body can be well sealed, thereby avoiding the phenomenon of oil dripping at the connection between the fuel injector body 102 and the hollow tubular seat body.

[0025] Among them, a receiving groove 104 adapted to the bottom end of the fuel injector body 102 is opened at the top of the hollow seat body 101, the fuel injector body 102 is detachably connected to the hollow seat body 101, the bottom end of the fuel injector body 102 is located in the receiving groove 104, the sealing gasket 103 is interference fit with the hollow seat body 101, and is fixedly arranged on the outside of the fuel injector body 102, and an oil inlet 105 is provided at the connection between the hollow seat body 101 and the receiving groove 104, and an oil injection cavity 106 is provided in the fuel injector body 102, and the oil injection cavity 106 is communicated with the oil inlet 105, so that the fuel in the oil injection cavity 106 of the fuel injector body 102 is transferred to the oil inlet 105 of the hollow seat body 101.

[0026] Secondly, the sealing gasket 103 is made of NBR nitrile rubber. By arranging the sealing gasket 103 on the outside of the injector body 102, when the injector body 102 is gradually screwed into the inside of the hollow seat body 101, the sealing gasket 103 will have an interference fit with the hollow seat body 101, so that the sealing gasket 103 will seal the gap between the injector body 102 and the hollow seat body 101, thereby realizing the sealed installation of the injector body 102 and the hollow seat body 101.

[0027] Again, the hollow seat body 101 has an internal thread, and the fuel injector body 102 has an external thread. The hollow seat body 101 and the fuel injector body 102 are connected by threads to achieve a detachable connection between the fuel injector body 102 and the hollow seat body 101.

[0028] At the same time, a fuel injection hole 107 and a truncated cone-shaped conical hole 108 are sequentially arranged on the side of the fuel inlet 105 away from the accommodating groove 104 from top to bottom. The accommodating groove 104, the fuel inlet 105, the fuel injection hole 107 and the truncated cone-shaped conical hole 108 are sequentially connected. The fuel inlet 105 and the fuel injection hole 107 are both conical structures with a large top and a small bottom. By setting the fuel inlet 105 and the fuel injection hole 107, the fuel entering the hollow seat body 101 can be compressed in the fuel inlet 105 and the fuel injection hole 107, ensuring the pressure when the fuel is atomized and sprayed out, and effectively improving the fuel atomization effect. The fuel injection hole 107 is connected to the truncated cone-shaped conical hole 108, and the truncated cone-shaped conical hole 108 is a conical structure with a small top and a large bottom, so that the truncated cone-shaped conical hole 108 can further disperse the atomized particles at the moment of atomization spraying, further improving the fuel atomization effect.

[0029] In addition, the number of the oil injection holes 107 and the number of the frustoconical tapered holes 108 are the same, and the number of the oil injection holes 107 and the number of the frustoconical tapered holes 108 are at least two.

[0030] Finally, the fuel injection holes 107 and the truncated cone-shaped holes 108 are distributed in the hollow seat body 101 in a ring array, so that the fuel entering the fuel inlet 105 can be diverted to achieve compression of the fuel.

[0031] When using the utility model, when using the automobile fuel injector, the external thread of the fuel injector body 102 is gradually screwed into the internal thread of the hollow seat body 101, thereby driving the sealing gasket 103 to gradually enter the hollow seat body 101. When the external thread of the fuel injector body 102 can no longer be screwed into the internal thread of the hollow seat body 101, the sealing gasket 103 will be embedded between the fuel injector body 102 and the hollow seat body 101, and the gap between the fuel injector body 102 and the hollow seat body 101 will be completely sealed, thereby realizing the sealed installation of the fuel injector body 102 and the hollow seat body 101.

[0032] After the fuel injector body 102 is sealed and installed in the hollow seat body 101, the fuel enters the receiving groove 104 of the hollow seat body 101 from the fuel injection cavity 106 of the fuel injector body 102, and gradually enters the fuel inlet 105 from the receiving groove 104. At this time, since the fuel inlet 105 is a conical structure with a large top and a small bottom, the fuel will be initially compressed at the fuel inlet 105. After that, the fuel will enter the fuel injection hole 107 from the fuel inlet 105. Since the fuel injection hole 107 is also a conical structure with a large top and a small bottom, The fuel will be further compressed at the injection hole 107. By compressing the fuel twice at the fuel inlet 105 and the injection hole 107, the fuel can have a greater pressure before being sprayed out, thereby ensuring the atomization spraying effect of the fuel. Then, the fuel at the injection hole 107 will enter the truncated cone hole 108. Since the truncated cone hole 108 is a conical structure with a small top and a large bottom, the truncated cone hole 108 can further disperse the atomized particles at the moment of atomization spraying, thereby further improving the fuel atomization effect.

[0033] In summary, by allowing the hollow seat body 101 to be detachably connected to the fuel injector body 102 and providing the sealing gasket 103, the fuel injector body 102 can be sealed and installed in the hollow tubular seat body, thereby achieving a good seal between the fuel injector body 102 and the hollow tubular seat body, thereby avoiding the phenomenon of oil dripping at the connection between the fuel injector body 102 and the hollow tubular seat body.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A valve seat for an automobile fuel injection nozzle, comprising a hollow seat body, characterized in that: The cam is an angular channel that is adapted to channel the bottom of the nozzle body to the left of the cam, and the cam is engaged with the piston rod of the piston rod and the piston rod of the piston rod.

2. The automobile fuel injection nozzle valve seat according to claim 1, characterized in that: The sealing gasket is made of NBR nitrile rubber.

3. The automobile fuel injection nozzle valve seat according to claim 1, characterized in that: The hollow seat body has an internal thread, and the fuel injector body has an external thread. The hollow seat body and the fuel injector body are connected via threads to achieve a detachable connection between the fuel injector body and the hollow seat body.

4. The automobile fuel injection nozzle valve seat according to claim 1, characterized in that: An oil spray hole and a truncated cone-shaped hole are sequentially arranged on a side of the oil inlet away from the containing groove from top to bottom, and the containing groove, the oil inlet, the oil spray hole and the truncated cone-shaped hole are sequentially connected.

5. The automobile fuel injection nozzle valve seat according to claim 4, characterized in that: The number of the oil injection holes and the number of the truncated cone-shaped holes are the same, and the number of the oil injection holes and the number of the truncated cone-shaped holes are at least two.

6. The automobile fuel injection nozzle valve seat according to claim 5, characterized in that: The oil injection holes and the truncated cone-shaped holes are distributed in the hollow seat body in an annular array.

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