Inductive ignition coil for electronic fuel injection motorcycle

Abstract

The invention relates to an inductive ignition coil for an electronic fuel injection type motorcycle, comprising a magnetic core, a primary coil and a secondary coil. A shell is arranged on the outer side of the secondary coil. The magnetic core is arranged in a "U" shape and is connected with a closing strip. The magnetic core and the closing strip form a closed loop of a "mouth" shaped structure. The magnetic core comprises an internal part and an external part. The ends of the external part and the ends of the internal part are both provided with a first convex block. A first groove is arranged on one side of the closing strip. A second convex block is arranged on the inner side of the first groove. A second groove is arranged on the outer side of the first convex block. The first convex block is connected to the first groove by mortise and tenon joints, and the second convex block is connected to the second groove by mortise and tenon joints, so that each silicon steel sheet can be closely fitted, and the magnetic core corresponds to the closing strip one by one to form a closed loop structure, thereby improving conversion efficiency and preventing magnetic leakage. The ignition energy is released more concentratedly and can generate higher voltage and current. The appearance is beautiful, the structure is compact, and the installation process is simple, which is more suitable for automated mass production.

Description

Technical Field

[0001] The invention relates to the technical field of igniters, in particular to an inductive ignition coil for an electronic injection type motorcycle. Background Art

[0002] The conventional inductive ignition coil core of electronic fuel injection motorcycles in the existing market is generally a single rod structure. This structure is an open magnetic circuit structure. After the magnetic energy is stored, it leaks a lot of magnetic flux and is seriously disturbed by the earth's magnetic field when it is suddenly released. There are many eddy current losses, resulting in low conversion efficiency.

[0003] The working principle of the inductive ignition coil of an electronic fuel injection motorcycle is completely different from that of the capacitive ignition coil of a motorcycle. The capacitive ignition coil of a motorcycle converts the pulsed AC voltage (200V-250V) output by the motorcycle igniter into high voltage electricity (20,000 volts-30,000 volts). During the conversion process, the iron core does not store magnetic energy, but simply generates induced high voltage electricity in the same cycle. This mode is the conversion of low-voltage AC to high-voltage AC, while the working mode of the inductive ignition coil of an electronic fuel injection motorcycle is that in the first cycle, the primary coil is controlled by the central processor of the ECU (core component of electronic fuel injection) to conduct to the negative pole, so that the 12V DC generates magnetic field energy and is stored in the middle iron core, and in the second cycle, the ECU gives a control signal to cause the magnetic energy stored in the iron core to mutate and release, thereby causing the secondary coil to generate an induced high voltage output of about 40,000 volts. This mode is the conversion of low-voltage DC to high-voltage AC. This working mode has higher requirements for the closure of the iron core, and the connection interface requires that each overlapped piece can be fully in contact, and no air gap is allowed.

[0004] The patent number (201120141899.0) is a capacitive ignition coil using a U-shaped structure. The other semi-circular iron core is riveted to the two ends of the rod by rivets on the original rod-shaped iron core. Only the upper and lower silicon steel sheets can be reliably contacted, while the remaining sheets cannot be in close contact and leave a large gap. If the inductive ignition coil also adopts this structure, it will cause the charging time of the inductive ignition coil of the electronic fuel injection motorcycle to be longer, the ignition energy release is not concentrated, and higher voltage and current cannot be generated. It is easy to generate high temperature, consume high electricity and cause the motorcycle battery to be seriously depleted. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide an electronic fuel injection type motorcycle inductive ignition coil which has beautiful appearance, compact structure, can effectively prevent magnetic leakage, has higher conversion efficiency, and can generate higher voltage and current.

[0006] The technical solution adopted by the present invention is:

[0007] An inductive ignition coil for an electronic fuel injection motorcycle comprises a magnetic core, a primary coil wrapped around the magnetic core, and a secondary coil arranged outside the primary coil, a shell is arranged outside the secondary coil, the magnetic core is arranged in a "U" shape, and a closing strip is connected to its open end, and a closed loop of a "mouth" shaped structure is formed with the closing strip, the magnetic core comprises an internal part and an external part arranged on one side of the shell, both ends of the external part and ends of the internal part are provided with a first protrusion, one side of the closing strip is provided with a first groove, a second protrusion is provided on the inner side of the first groove, a second groove is provided on the outer side of the first protrusion, the first protrusion is connected to the first groove by mortise and tenon joints, and the second protrusion is connected to the second groove by mortise and tenon joints.

[0008] Preferably, first mounting holes are provided on both sides of the closed loop, and a second mounting hole is provided in the middle thereof, and the second mounting hole is arranged on the external portion.

[0009] Preferably, both sides of the closed loop are connected to mounting brackets, the mounting brackets include a pressing plate, a supporting plate and a fixing plate, the pressing plate, the supporting plate and the fixing plate are connected in sequence to form a "Z" shaped structure, the pressing plate is arranged at the top of the closed loop, and a fixing pin is provided on the lower side thereof, the fixing pin passes through the first mounting hole, and a fixing head is connected to the end thereof, and a third mounting hole is provided on the fixing plate.

[0010] Preferably, a clamping sheet is provided on the side of the pressing sheet away from the supporting sheet, and both the clamping sheet and the supporting sheet are in contact with the closed loop.

[0011] Preferably, the magnetic core and the closing strip are both formed by stacking more than ten layers of silicon steel sheets, and two adjacent layers of silicon steel sheets are closely connected to each other without a gap.

[0012] Preferably, a protrusion is provided on one side of each layer of silicon steel sheet, and a recess corresponding to the protrusion is provided on the other side. Two adjacent layers of silicon steel sheets are riveted and overlapped with each other through the protrusions and the recesses, and the protrusion of the magnetic core is arranged in the opposite direction to the protrusion of the closing strip.

[0013] Preferably, the thickness of each layer of silicon steel sheet is 1MM.

[0014] Preferably, the diameter of the primary coil is 0.5MM, and the number of turns is between 100-200 turns; the diameter of the secondary coil is 0.05MM-0.1MM, and the number of turns is between 8000-18000 turns.

[0015] Preferably, the surface of the mounting bracket is galvanized.

[0016] Preferably, the interior of the housing is filled with high pressure resistant epoxy resin.

[0017] The beneficial effects of the present invention are:

[0018] The inductive ignition coil for an electronic fuel injection motorcycle is connected by a first protrusion and a first groove by a mortise and tenon joint, and a second protrusion and a second groove by a mortise and tenon joint, so that each silicon steel sheet can fit tightly, and the magnetic core corresponds to the closing strip one by one to form a closed-loop structure, thereby improving conversion efficiency and preventing magnetic leakage. The ignition energy is released more concentratedly and can generate higher voltage and current. The coil has a beautiful appearance and a compact structure. The sinusoidal waveform generated during discharge is single and has no after-excitation wave. The coil has a simple installation process and is more suitable for automated mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the installation of the magnetic core.

[0020] Figure 2 for Figure 1 Schematic diagram of the decomposition.

[0021] Figure 3 This is a schematic diagram of the connection of the magnetic core.

[0022] Figure 4 for Figure 3 A magnified schematic diagram of center A.

[0023] Figure 5 It is a structural schematic diagram of the present invention.

[0024] Figure 6 The figure is a connection diagram for mounting the bracket.

[0025] Figure 7 for Figure 5 Cross-sectional view at the middle BB.

[0026] In the figure: 1. magnetic core; 2. primary coil; 3. secondary coil; 4. shell; 5. closing strip; 6. closed loop; 7. built-in part; 8. external part; 9. first protrusion; 10. first groove; 11. second protrusion; 12. second groove; 13. first mounting hole; 14. second mounting hole; 15. mounting bracket; 16. pressing plate; 17. supporting plate; 18. fixing plate; 19. fixing pin; 20. fixing head; 21. third mounting hole; 22. clamping plate; 23. raised part; 24. recessed part. DETAILED DESCRIPTION

[0027] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-7The present invention provides a technical solution: an inductive ignition coil for an electronic fuel injection motorcycle, comprising a magnetic core 1, a primary coil 2 wrapped around the magnetic core 1, and a secondary coil 3 arranged outside the primary coil 2, characterized in that: a shell 4 is provided on the outside of the secondary coil 3, the magnetic core 1 is arranged in a "U" shape, and a closing strip 5 is connected to its open end, and a closed loop 6 of a "mouth" shaped structure is formed with the closing strip 5, the magnetic core 1 comprises an internal part 7 and an external part 8 arranged on one side of the shell 4, the end of the external part 8 and the end of the internal part 7 are both provided with a first protrusion 9, a first groove 10 is provided on one side of the closing strip 5, a second protrusion 11 is provided on the inner side of the first groove 10, a second groove 12 is provided on the outer side of the first protrusion 9, the first protrusion 9 is connected to the first groove 10 by mortise and tenon joints, and the second protrusion 11 is connected to the second groove 12 by mortise and tenon joints.

[0029] For the convenience of installation, in the present embodiment, preferably, first mounting holes 13 are provided on both sides of the closed loop 6 , and a second mounting hole 14 is provided in the middle thereof, and the second mounting hole 14 is arranged on the external portion 8 .

[0030] In order to further facilitate the installation and make the structure more stable, in the present embodiment, preferably, both sides of the closed loop 6 are connected with mounting brackets 15, the mounting brackets 15 include a pressing plate 16, a supporting plate 17 and a fixing plate 18, the pressing plate 16, the supporting plate 17 and the fixing plate 18 are connected in sequence to form a "Z"-shaped structure, the pressing plate 16 is arranged on the top of the closed loop 6, and a fixing pin 19 is provided on the lower side thereof, the fixing pin 19 passes through the first mounting hole 13, and a fixing head 20 is connected at the end thereof, and a third mounting hole 21 is provided on the fixing plate 18, the purpose is to fix the connection externally through the fixing plate 18, connect with the pressing plate 16 through the supporting plate 17, and press the closed loop 6 through the pressing plate 16, so that the installation of the closed loop 6 is more stable, and the fixing pin 19 further prevents the closed loop 6 from shifting in the horizontal direction, and the fixing head 20 prevents the closed loop 6 from shifting in the vertical direction.

[0031] In order to further make the structure more stable, in the present embodiment, preferably, a clamping plate 22 is provided on the side of the pressing plate 16 away from the supporting plate 17, and both the clamping plate 22 and the supporting plate 17 are in contact with the closed loop 6. The purpose is to clamp the closed loop 6 by the clamping plate 22 and the supporting plate 17, so as to further prevent the closed loop 6 from shifting in the horizontal direction and make the structure more stable.

[0032] In order to improve conversion efficiency, prevent magnetic leakage, and concentrate the ignition energy release, in this embodiment, preferably, the magnetic core 1 and the closing strip 5 are both formed by stacking more than ten layers of silicon steel sheets, and two adjacent layers of silicon steel sheets are connected to each other without gaps.

[0033] In order to ensure that each silicon steel sheet can fit tightly, in the present embodiment, preferably, a protrusion 23 is provided on one side of each layer of silicon steel sheet, and a recessed portion 24 corresponding to the protrusion 23 is provided on the other side, and two adjacent layers of silicon steel sheets are riveted and overlapped with each other through the protrusion 23 and the recessed portion 24, and the direction of the protrusion 23 of the magnetic core 1 is opposite to the protrusion 23 of the closing strip 5.

[0034] In order to improve the conversion efficiency, in this embodiment, preferably, the thickness of each layer of silicon steel sheet is 1MM.

[0035] In order to improve the conversion efficiency, in this embodiment, preferably, the diameter of the primary coil 2 is 0.5MM, and the number of turns is between 100-200 turns, and the diameter of the secondary coil 3 is 0.05MM-0.1MM, and the number of turns is between 8000-18000 turns.

[0036] In order to protect the mounting bracket 15 from corrosion and make it more beautiful, in this embodiment, preferably, the surface of the mounting bracket 15 is galvanized.

[0037] In order to make the internal structure of the shell 4 more stable and improve the heat resistance and electrical insulation, in this embodiment, preferably, the interior of the shell 4 is filled with high-pressure resistant epoxy resin.

[0038] The working principle and use process of the present invention are as follows: the primary coil 2 is wound on the primary frame, and a square hole is left in the center of the primary frame for passing through. Similarly, the secondary coil 3 is wound on the secondary frame, and the primary frame and the secondary frame are assembled and placed in the outer shell 4, and high-voltage insulating epoxy resin material is directly poured. After the bubbles are extracted in a vacuum state, the epoxy is cured by high temperature.

[0039] In the next step, the built-in part 7 of the magnetic core 1 is pressed into the square hole of the semi-finished product with a clamp, and then the two ends of the closing strip 5 are pressed into the interface of the magnetic core 1 using a special clamp to form a connection without an air gap, wherein the magnetic core 1 is arranged in a "U" shape, and the closing strip 5 is arranged in an "I" shape, and the first protrusion 9 is connected to the first groove 10 through mortise and tenon joints, and the second protrusion 11 is connected to the second groove 12 through mortise and tenon joints, so that the magnetic core 1 and the closing strip 5 form a closed loop 6 of a "mouth" shaped structure.

[0040] The magnetic core 1 and the closing strip 5 are both formed by stacking ten layers of silicon steel sheets, each layer of silicon steel sheet is 1MM thick, and two adjacent layers of silicon steel sheets are connected to each other without gaps. A protrusion 23 is provided on one side of each layer of silicon steel sheet, and a recessed portion 24 corresponding to the protrusion 23 is provided on the other side. The two adjacent layers of silicon steel sheets are riveted and stacked with each other through the protrusion 23 and the recessed portion 24. The protrusion 23 of the magnetic core 1 is opposite to the protrusion 23 of the closing strip 5, so that each silicon steel sheet can fit tightly, and the magnetic core corresponds to the closing strip one by one to form a closed-loop structure, which improves conversion efficiency and prevents magnetic leakage. The ignition energy release is more concentrated and can generate higher voltage and current. It has beautiful appearance and compact structure. The sinusoidal wave waveform generated during discharge is single and has no after-excitation wave. The installation process is simple and it is more suitable for automated mass production. The concave and convex parts in the mortise and tenon connection structure can adopt a variety of shapes, and these concave and convex shapes can fit tightly to each other.

[0041] Finally, it should be noted that the above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An inductive ignition coil for an electronic fuel injection motorcycle, comprising a magnetic core (1), a primary coil (2) wound around the magnetic core (1), and a secondary coil (3) arranged outside the primary coil (2), characterized in that: A shell (4) is provided on the outside of the secondary coil (3); the magnetic core (1) is arranged in a "U" shape, and a closing strip (5) is connected to the open end thereof, and together with the closing strip (5) forms a closed loop (6) of a "mouth"-shaped structure; the magnetic core (1) comprises an internal part (7) and an external part (8) arranged on one side of the shell (4); both the end of the external part (8) and the end of the internal part (7) are provided with a first protrusion (9); one side of the closing strip (5) is provided with a first groove (10); a second protrusion (11) is provided on the inner side of the first groove (10); a second groove (12) is provided on the outer side of the first protrusion (9); the first protrusion (9) and the first groove (10) are connected by mortise and tenon joints, and the second protrusion (11) and the second groove (12) are connected by mortise and tenon joints; The closed loop (6) is provided with first mounting holes (13) on both sides thereof, and a second mounting hole (14) is provided in the middle thereof, wherein the second mounting hole (14) is arranged on the external portion (8); Both sides of the closed loop (6) are connected with mounting brackets (15), the mounting brackets (15) comprising a pressing plate (16), a supporting plate (17) and a fixing plate (18), the pressing plate (16), the supporting plate (17) and the fixing plate (18) being connected in sequence to form a "Z"-shaped structure, the pressing plate (16) being arranged at the top of the closed loop (6), and a fixing pin (19) being arranged at the lower side thereof, the fixing pin (19) passing through the first mounting hole (13), and a fixing head (20) being connected at the end thereof, and a third mounting hole (21) being arranged on the fixing plate (18); A clamping sheet (22) is provided on the side of the pressing sheet (16) away from the supporting sheet (17), and both the clamping sheet (22) and the supporting sheet (17) are in contact with the closed loop (6); The magnetic core (1) and the closing strip (5) are both formed by stacking more than ten layers of silicon steel sheets, and two adjacent layers of silicon steel sheets are connected to each other without gaps; The surface of the mounting bracket (15) is galvanized.

2. The inductive ignition coil for electronic fuel injection motorcycle according to claim 1, characterized in that: A protrusion (23) is provided on one side of each layer of silicon steel sheets, and a recess (24) corresponding to the protrusion (23) is provided on the other side. Two adjacent layers of silicon steel sheets are riveted and overlapped with each other through the protrusion (23) and the recess (24). The protrusion (23) of the magnetic core (1) is arranged in the opposite direction to the protrusion (23) of the closing strip (5).

3. The inductive ignition coil for electronic fuel injection motorcycle according to claim 1, characterized in that: The thickness of each layer of silicon steel sheet is 1MM.

4. The inductive ignition coil for electronic fuel injection motorcycle according to claim 1, characterized in that: The diameter of the primary coil (2) is 0.5MM, and the number of turns is between 100-200 turns; the diameter of the secondary coil (3) is 0.05MM-0.1MM, and the number of turns is between 8000-18000 turns.

5. The inductive ignition coil for electronic fuel injection motorcycle according to claim 1, characterized in that: The interior of the shell (4) is filled with high-pressure resistant epoxy resin.

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