Electromagnet for dual-fuel injector

Abstract

The invention discloses an electromagnet for a dual-fuel injector. The electromagnet comprises a shell, a first coil, a second coil, a first connector and a second connector. The shell is divided into a first shell, a second shell and a third shell which are arranged up, middle and down; the first coil and the second coil are coaxially arranged in the second shell, the first coil is arranged on the upper portion, and the second coil is arranged on the lower portion; the first connector is arranged in the second shell and is provided with four jacks; the four jacks extend out of the second shell, enter the first shell and are respectively connected with positive and negative ends of the first coil and the second coil; the second connector is arranged in the first shell and provided with four pins, and each pin is inserted into the corresponding four jacks to lead out wires of the first coil and the second coil. The electromagnet assembly for the dual-fuel injector has the advantages that compact installation of the dual-electromagnet assembly is achieved, the structure is more reasonable, manufacturing and assembling are convenient, and the production cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of dual fuel injectors, and in particular to an electromagnet used for dual fuel injectors. Background Art

[0002] With the development of energy diversification, liquid fuels such as methanol and ethanol are increasingly being used as fuels due to their cleanliness or renewability. At present, the commonly used fuel injection technology is that the fuel enters the combustion chamber and is ignited by the spark plug. In order to further improve the thermal efficiency and low-carbon fuel substitution rate, the technical route of in-cylinder diesel micro-injection ignition high-pressure direct injection of low-carbon fuel has been proposed, which means that two injectors must be arranged on the engine cylinder head. In order to save space on the cylinder head, a dual-fuel injector has been developed. The working principle of the dual-fuel injector is to first inject a small amount of diesel for ignition, and then inject methanol as the main fuel for combustion.

[0003] The dual-fuel injector mentioned in the Chinese utility model patent authorization announcement number CN220227058U is a split structure, and the two solenoid valves are independently installed at the upper end of the injector, which causes the volume of the entire dual-fuel injector to become larger, which is not conducive to installation in the small space of the engine. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing dual-fuel injector has a split structure, and the two solenoid valves are independently installed at the upper end of the injector, which causes the volume of the entire dual-fuel injector to become larger, which is not conducive to installation in the narrow space of the engine. A compact electromagnet for a dual-fuel injector is provided, which can realize compact installation of the dual electromagnet assembly, and has a more reasonable structure, and has the advantages of easy manufacturing and assembly, low production cost, etc.

[0005] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0006] An electromagnet for a dual fuel injector, comprising:

[0007] A housing, wherein the housing is divided into a first housing, a second housing, and a third housing arranged in an upper, middle, and lower manner;

[0008] A first coil and a second coil, wherein the first coil and the second coil are coaxially placed in a second housing, wherein the first coil is on the top and the second coil is on the bottom;

[0009] A first connector, which is arranged in the second housing and has four connector holes, which extend out of the second housing and enter into the first housing and are respectively connected to the positive and negative ends of the first coil and the second coil;

[0010] The second connector is arranged in the first housing and has four pins, each pin is inserted into the corresponding four connector holes to lead out the wires of the first coil and the second coil.

[0011] In a preferred embodiment of the present invention, the second connector is a four-core plug.

[0012] In a preferred embodiment of the present invention, a stepped hole is provided in the first shell, and the four connecting holes are fixed in the stepped hole.

[0013] In a preferred embodiment of the present invention, sealing rings are provided on the outside of the first connector and the second connector to isolate the fuel outside the first coil and the second coil to prevent the wires of the first coil and the second coil from contacting the liquid fuel.

[0014] In a preferred embodiment of the present invention, a first cover plate and a second cover plate are respectively fixed to two end surfaces of the second shell that contact the first shell and the third shell, and the first cover plate and the second cover plate respectively seal the first coil and the second coil in the second shell;

[0015] In a preferred embodiment of the present invention, a first spring hole and a second spring hole are provided in the second shell body, and the first spring hole and the second spring hole are separated by a spacer ring; a first push-pull rod and a first armature are provided in the first shell body, and a first spring is provided in the first spring hole, the first armature is fixedly connected to the first push-pull rod, and the inner end of the first push-pull rod extends through the first cover plate into the first spring hole and contacts with one end of the first spring; a second push-pull rod and a second armature are provided in the third shell body, and a second spring is provided in the second spring hole, the second armature is fixedly connected to the second push-pull rod, and the inner end of the second push-pull rod extends through the second cover plate into the second spring hole and contacts with one end of the second spring; the other end of the first spring and the other end of the second spring act on the two end faces of the spacer ring.

[0016] In a preferred embodiment of the present invention, the first push-pull rod, the first armature, the first spring, the second push-pull rod, the second armature, and the second spring are coaxially arranged.

[0017] By adopting the above technical solution, the electromagnet assembly for the dual fuel injector of the present invention has the advantages of realizing compact installation of the dual electromagnet assembly, more reasonable structure, convenient manufacturing and assembly, low production cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the electromagnet used for the dual fuel injector of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] See also Figure 1 The electromagnet for a dual fuel injector shown in the figure includes: a housing, a first coil 3, a second coil 4, a first push-pull rod 10, a first armature 11, a first spring 12, a second push-pull rod 13, a second armature 14, a second spring 15, a first connector 8 and a second connector 9.

[0021] The shell is divided into a first shell 1, a second shell 7 and a third shell 6 arranged in an upper, middle and lower manner; a first spring hole 16 and a second spring hole 17 are arranged in the second shell 7, and the first spring hole 16 and the second spring hole 17 are separated by a spacer ring 18, and the first spring hole 16, the second spring hole 17 and the spacer ring 18 are coaxially arranged.

[0022] The first coil 3 and the second coil 4 are coaxially placed in the second housing 7 , with the first coil 3 on the top and the second coil 4 on the bottom. The first coil 3 is located at the periphery of the first spring hole 16 , and the second coil 4 is located at the periphery of the second spring hole 17 .

[0023] A first cover plate 2 and a second cover plate 5 are fixed to two end surfaces of the second shell 7 that contact the first shell 1 and the third shell 6 , respectively. The first cover plate 2 and the second cover plate 5 seal the first coil 3 and the second coil 4 in the second shell 7 , respectively.

[0024] A first push-pull rod 10 and a first armature 11 are arranged in the first housing 1, and a first spring 12 is arranged in the first spring hole 16. The first armature 11 is fixedly connected to the first push-pull rod 10. The inner end of the first push-pull rod 10 extends through the first cover plate 2 into the first spring hole 16 and contacts one end of the first spring 12.

[0025] A second push-pull rod 13 and a second armature 14 are arranged in the third housing 6, and a second spring 15 is arranged in the second spring hole 17. The second armature 14 is fixedly connected to the second push-pull rod 13. The inner end of the second push-pull rod 13 passes through the second cover plate 5 and extends into the second spring hole 17 to contact one end of the second spring 15. The other end of the first spring 12 and the other end of the second spring 15 act on the two end surfaces of the spacer ring 18. The first push-pull rod 10, the first armature 11, the first spring 12, the second push-pull rod 13, the second armature 14, and the second spring 15 are coaxially arranged. The first push-pull rod 10 extends from the upper end surface of the first housing 1, and the second push-pull rod 13 extends from the lower end surface of the third housing 6.

[0026] The first connector 8 is arranged in the second housing 7 and has four connector holes extending from the second housing 7 into the first housing 1. A stepped hole is provided in the first housing 1, and the four connector holes are fixed in the stepped hole, thereby ensuring the fixation of the four connector holes of the first connector 8. The four connector holes are respectively connected to the positive and negative ends of the first coil 3 and the second coil 4;

[0027] The second connector 9 is arranged in the first housing 1 . The second connector 9 is a four-core plug with four pins. Each pin is inserted into four corresponding connector holes to lead out the wires of the first coil 3 and the second coil 3 .

[0028] Sealing rings are provided on the outside of the first connector 8 and the second connector 8 to isolate the fuel outside the first coil 3 and the second coil 4 and prevent the wires of the first coil 3 and the second coil 4 from contacting with the liquid fuel.

Claims

1. An electromagnet for a dual fuel injector, characterized in that: include: A housing, wherein the housing is divided into a first housing, a second housing, and a third housing arranged in an upper, middle, and lower manner; A first coil and a second coil, wherein the first coil and the second coil are coaxially placed in a second housing, wherein the first coil is on the top and the second coil is on the bottom; A first connector, which is arranged in the second housing and has four connector holes, which extend out of the second housing and enter into the first housing and are respectively connected to the positive and negative ends of the first coil and the second coil; The second connector is arranged in the first housing and has four pins, each pin is inserted into the corresponding four connector holes to lead out the wires of the first coil and the second coil.

2. An electromagnet for a dual fuel injector according to claim 1, characterized in that: The second connector is a four-core plug.

3. An electromagnet for a dual fuel injector according to claim 1, characterized in that: A stepped hole is arranged in the first shell, and the four connecting holes are fixed in the stepped hole.

4. An electromagnet for a dual fuel injector according to claim 1, characterized in that: Sealing rings are arranged on the outer sides of the first connector and the second connector to isolate the fuel outside the first coil and the second coil, thereby preventing the wires of the first coil and the second coil from contacting the liquid fuel.

5. The electromagnet for a dual fuel injector according to claim 1, characterized in that: A first cover plate and a second cover plate are fixed to two end surfaces of the second shell that are in contact with the first shell and the third shell, respectively. The first cover plate and the second cover plate seal the first coil and the second coil in the second shell, respectively.

6. An electromagnet for a dual fuel injector according to any one of claims 1 to 5, characterized in that: A first spring hole and a second spring hole are provided in the second shell body, and the first spring hole and the second spring hole are separated by a spacer ring; a first push-pull rod and a first armature are provided in the first shell body, and a first spring is provided in the first spring hole, the first armature is fixedly connected to the first push-pull rod, and the inner end of the first push-pull rod extends through the first cover plate into the first spring hole and contacts with one end of the first spring; a second push-pull rod and a second armature are provided in the third shell body, and a second spring is provided in the second spring hole, the second armature is fixedly connected to the second push-pull rod, and the inner end of the second push-pull rod extends through the second cover plate into the second spring hole and contacts with one end of the second spring; the other end of the first spring and the other end of the second spring act on the two end surfaces of the spacer ring.

7. An electromagnet for a dual fuel injector according to claim 6, characterized in that: The first push-pull rod, the first armature, the first spring, the second push-pull rod, the second armature, and the second spring are coaxially arranged.

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