Low-induced-voltage overhead single-cylinder independent ignition coil

Abstract

A low-induced-voltage overhead single-cylinder independent ignition coil comprises a shell, the shell is provided with a lateral opening and a side cover installed on the opening, a low-voltage head is installed at the top of the shell, a high-voltage head is formed at the bottom of the shell, and the interior of the shell is divided into a first cavity located below the low-voltage head and a second cavity located above the high-voltage head. An ignition module is installed in the first cavity, a high-voltage positioning block and a coil assembly are installed in the second cavity, epoxy resin is filled in the second cavity, the high-voltage positioning block is located between the high-voltage head and the high-voltage end of the coil assembly, and the high-voltage positioning block is configured to press and fix the coil assembly in the second cavity and achieve electric connection with the high-voltage head. According to the utility model, the diode is connected and placed at the secondary high-voltage end in a pressing and inserting manner, the positioning sheet is a carrier, the two ends of the diode are pressed and inserted with the connecting sheets, and the two connecting sheets are respectively matched with the secondary terminal and the output end resistor, so that the induced voltage generated at the secondary stage during primary conduction is effectively reduced, and the tempering phenomenon in an engine cylinder is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of ignition coil structure. BACKGROUND

[0002] In automobile engine ignition system, ignition coil is a kind of executive component for providing ignition energy for igniting the air and fuel mixture in engine cylinder. It is a kind of special pulse booster based on electromagnetic induction principle, which makes 8-16V low voltage according to set frequency on-off to make 20-40KV voltage in secondary produce electric spark through spark plug. The utility model patent with application number 201810931477.X discloses a kind of top-mounted single cylinder independent ignition coil, including high-pressure rod, high-pressure rod has passageway inside, high-pressure spring is arranged in passageway, the bottom of high-pressure rod has high-pressure connection end, the top of high-pressure rod has interconnection end;Shell is connected at interconnection end, shell has opening towards side, a drawer structure is installed in opening, drawer mechanism includes frame body, coil assembly, low pressure head, coil assembly includes T-shaped core pressed from powder metallurgy, PI insulating layer covering on the core column of T-shaped core, primary winding wound on PI insulating layer, secondary skeleton set outside primary winding, secondary winding wound on secondary skeleton, and mouth-shaped core pressed from powder metallurgy arranged outside T-shaped core, T-shaped core bottom surface and inner wall of mouth-shaped core are attracted together by a rare earth magnet, low pressure head has a substrate, substrate is provided with ignition module, low voltage tab connected by resistance welding. The ignition coil of the structure is because high-voltage diode is arranged at the low-voltage end of secondary coil, so that larger induced voltage is generated in secondary when primary is turned on, resulting in engine cylinder backfire phenomenon. SUMMARY

[0003] The utility model aims at providing a kind of low inductive voltage top-mounted single cylinder independent ignition coil with smaller secondary induced voltage.

[0004] In order to achieve the above-mentioned purpose, the utility model employs the technical scheme of: a kind of low inductive voltage top-mounted single cylinder independent ignition coil, including shell, the shell has lateral opening and side cover installed on the opening, the top of the shell is installed with low pressure head, the bottom of the shell forms high pressure head, the inside of the shell is divided into first cavity located below the low pressure head, second cavity located above the high pressure head, ignition module is installed in the first cavity, high pressure positioning block and coil assembly are installed in the second cavity and filled with epoxy resin, the high pressure positioning block is located between high pressure head and the high voltage end of coil assembly, the high pressure positioning block is configured to compress and fix the coil assembly in the second cavity and realize electrical connection with the high pressure head.

[0005] Preferably, the high-voltage positioning block is provided with a high-voltage diode, a first connecting sheet and a second connecting sheet, the first connecting sheet is connected to one end of the high-voltage diode and has an elastic connecting portion facing the side, and the second connecting sheet is connected to the other end of the high-voltage diode and has a connecting hole facing downward.

[0006] Preferably, the high-voltage head is provided with a high-voltage sheath, and the high-voltage sheath is longitudinally provided with a high-voltage spring.

[0007] Preferably, the high-voltage head is provided with a suppression resistor and a high-voltage pin, the high-voltage pin is connected to the upper end of the high-voltage spring, the lower end of the suppression resistor is connected to the high-voltage pin, and the upper end of the suppression resistor is arranged in the connecting hole of the second connecting sheet.

[0008] Preferably, the coil assembly comprises a T-shaped core, a primary skeleton wrapped outside the T-shaped core, a secondary skeleton wrapped on the primary skeleton, a first C-shaped core and a second C-shaped core arranged around the outside of the secondary skeleton, and the first C-shaped core and the second C-shaped core are combined together to form an O shape and are respectively connected to the end of the T-shaped core.

[0009] Preferably, the secondary skeleton is provided with a secondary winding, a negative high-voltage plug at the high-voltage end of the secondary skeleton, and a positive high-voltage plug at the low-voltage end of the secondary skeleton, one end of the secondary winding is connected to the negative high-voltage plug, the other end of the secondary winding is connected to the positive high-voltage plug, when the coil assembly is arranged in the second cavity, the negative high-voltage plug is elastically pressed by the elastic connecting portion of the first connecting sheet, and the positive high-voltage plug is connected to the ignition module.

[0010] Preferably, the negative high-voltage plug is located at the rear side of the secondary skeleton, and the positive high-voltage plug is located at the front side of the secondary skeleton.

[0011] Preferably, the end of the secondary skeleton is provided with a slot, the side end of the first C-shaped core and the second C-shaped core has an interconnection end, and the interconnection ends of the first C-shaped core and the second C-shaped core are connected together in the slot.

[0012] Preferably, the top surface of the T-shaped core and the interconnection end are adsorbed together through a magnetic sheet.

[0013] Preferably, the first C-shaped core and the second C-shaped core are wrapped with a buffer cover.

[0014] According to the low inductive voltage top-mounted single cylinder independent ignition coil, the diode is placed at the secondary high voltage end through the press-insertion type connection, the positioning sheet is the carrier, the two ends of the diode are pressed and inserted with the connecting sheets, and the two connecting sheets are matched with the secondary terminal and the output end resistor respectively, so that the induced voltage generated in the secondary during the primary conduction is effectively reduced, and the engine cylinder backfire phenomenon is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] BRIEF DESCRIPTION OF DRAWINGS Figure 1 FIG. 1 is a perspective view of a low inductive voltage top-mounted single cylinder independent ignition coil according to the present application;

[0016] BRIEF DESCRIPTION OF DRAWINGS Figure 2 FIG. 2 is an exploded view of the low inductive voltage top-mounted single cylinder independent ignition coil according to the present application;

[0017] BRIEF DESCRIPTION OF DRAWINGS Figure 3 FIG. 3 is a perspective view of a high voltage positioning block of the low inductive voltage top-mounted single cylinder independent ignition coil according to the present application;

[0018] BRIEF DESCRIPTION OF DRAWINGS Figure 4 FIG. 4 is a working principle diagram of the low inductive voltage top-mounted single cylinder independent ignition coil according to the present application. DETAILED DESCRIPTION

[0019] Hereinafter, terms used in the specification will be briefly described, and embodiments will be described in detail. All terms used herein, including descriptive terms or technical terms, should be interpreted to have meanings understood by those of ordinary skill in the art. However, the terms can have different meanings according to the intention of those of ordinary skill in the art, precedents, or the emergence of new technology.

[0020] In addition, some terms can be selected by the applicant, and in this case, the meaning of the selected term will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on the meaning of the terms together with the description in the entire specification. In addition, when a component "includes" or "comprises" an element, unless there is a specific description contrary thereto, the component can further include other elements, not excluding the other elements. In the following description, terms such as "component" and "module" indicate a unit for processing at least one function or operation, wherein the unit and module can be implemented as hardware or software or by combining hardware and software.

[0021] Embodiments will now be described more fully with reference to the accompanying drawings. Embodiments, however, can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. In the following description, well-known functions or constructions are not described in detail so as not to unnecessarily obscure the embodiments with details that will be readily apparent to those skilled in the art, and the same reference numerals are used throughout several drawings to represent the same or similar elements.

[0022] Figure 1 is a perspective view of a low-induction-voltage top-mounted single-cylinder independent ignition coil according to the present application, Figure 1 Figure 1 is a perspective view of a low-induction-voltage top-mounted single-cylinder independent ignition coil according to the present application, Figure 2 Figure 1 is a perspective view of a low-induction-voltage top-mounted single-cylinder independent ignition coil according to the present application, which comprises an outer shell 1, the shell 1 being mounted to an engine through a screw 22. The outer shell 1 has a lateral opening and a side cover 2 mounted on the opening, a low-pressure head 3 being mounted on the top of the outer shell 1, and a high-pressure head 4 being formed on the bottom of the outer shell 1, a high-pressure sheath 17 being mounted on the high-pressure head 4, a high-pressure spring 18 being longitudinally mounted in the high-pressure sheath 17, and a suppression resistor 19 and a high-pressure pin 20 being arranged in the high-pressure head 4, the high-pressure pin 20 being connected to the upper end of the high-pressure spring 18. The interior of the outer shell 1 is divided into a first cavity la below the low-pressure head 3 and a second cavity lb above the high-pressure head 4, an ignition module 5 being mounted in the first cavity la, a high-pressure positioning block 6 and a coil assembly being mounted in the second cavity lb and filled with epoxy resin.

[0023] The coil assembly comprises a T-shaped core 7, a primary skeleton 8 sleeved on the outside of the T-shaped core 7, a secondary skeleton 9 sleeved on the primary skeleton 8, a first C-shaped core 10 and a second C-shaped core 11 arranged around the outside of the secondary skeleton 9, the first C-shaped core 10 and the second C-shaped core 11 being combined together to form an O-shape and being respectively connected to the end portions of the T-shaped core 7. The outside of the first C-shaped core 10 and the second C-shaped core 11 is wrapped with a buffer cover.

[0024] The secondary skeleton 9 is wound with a secondary winding, the high-voltage end of the secondary skeleton 9 is provided with a negative high-voltage tab 12, the low-voltage end of the secondary skeleton 9 is provided with a positive high-voltage tab 13, one end of the secondary winding is connected to the negative high-voltage tab 12 and the other end is connected to the positive high-voltage tab 13, the negative high-voltage tab 12 is located at the rear side of the secondary skeleton 9, and the positive high-voltage tab 13 is located at the front side of the secondary skeleton 9. When the coil assembly is mounted in the second cavity lb, the negative high-voltage tab 12 is elastically compressed by the elastic connecting portion 15a of the first connecting tab 15, and the positive high-voltage tab 13 is connected to the ignition module 5.

[0025] The end of the secondary skeleton 9 is provided with a slot 9a, the side end of the first C-shaped core 10 and the second C-shaped core 11 has an interconnecting end 10a, 11a, and the interconnecting end 10a, 11a of the first C-shaped core 10 and the second C-shaped core 11 is connected together in the slot 9a. The top surface of the T-shaped core 7 and the interconnecting end 10a, 11a are adsorbed together through a magnetic sheet 21.

[0026] The Figure 3 It is a perspective view of the high-voltage positioning block of the low-induction-voltage top-mounted single-cylinder independent ignition coil according to the utility model. The high-voltage positioning block 6 is located between the high-voltage head 4 and the high-voltage end of the coil assembly, and the high-voltage positioning block 6 is configured to press and fix the coil assembly in the second cavity 1b and realize electrical connection with the high-voltage head 4. The high-voltage positioning block 6 is provided with a high-voltage diode 14, a first connecting sheet 15 and a second connecting sheet 16. The first connecting sheet 15 is connected to one end of the high-voltage diode 14 and has an elastic connecting part 15a facing the side, and the second connecting sheet 16 is connected to the other end of the high-voltage diode 14 and has a connecting hole 16a facing downward. The lower end of the suppression resistor 19 is connected to the high-voltage pin 20, and the upper end of the suppression resistor 19 is arranged in the connecting hole 16a of the second connecting sheet 16.

[0027] The Figure 4 It is a working principle diagram of the low-induction-voltage top-mounted single-cylinder independent ignition coil according to the utility model. The diode is placed in the secondary high-voltage end through the press-insertion type connection, the positioning sheet is the carrier, the two ends of the diode are pressed with the connecting sheets, the two connecting sheets are matched with the secondary terminal and the output end resistor respectively, and through verification, when the high-voltage diode is placed in the low-voltage end of the secondary coil, the induced voltage generated in the secondary coil during the primary conduction is about 900V, and when the high-voltage diode is placed in the high-voltage end of the secondary coil, the induced voltage generated in the secondary coil during the primary conduction is less than 200V, effectively reducing the induced voltage generated in the secondary coil during the primary conduction, and avoiding the backfire phenomenon in the engine cylinder.

[0028] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as available for other similar features or aspects in other embodiments. While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details can be made therein without departing from the spirit and scope as defined by the following claims.

Claims

1. A low-induction voltage overhead single-cylinder independent ignition coil, characterized in that: The device includes a housing (1) having a lateral opening and a side cover (2) mounted on the opening. A low-pressure head (3) is mounted on the top of the housing (1), and a high-pressure head (4) is formed at the bottom of the housing (1). The interior of the housing (1) is divided into a first cavity (1a) located below the low-pressure head (3) and a second cavity (1b) located above the high-pressure head (4). An ignition module (5) is installed in the first cavity (1a), and a high-pressure positioning block (6) and a coil assembly are installed and filled with epoxy resin in the second cavity (1b). The high-pressure positioning block (6) is located between the high-pressure head (4) and the high-pressure end of the coil assembly. The high-pressure positioning block (6) is configured to press and fix the coil assembly in the second cavity (1b) and make an electrical connection with the high-pressure head (4).

2. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 1, characterized in that: The high-voltage positioning block (6) is equipped with a high-voltage diode (14), a first connecting piece (15), and a second connecting piece (16). The first connecting piece (15) is connected to one end of the high-voltage diode (14) and has a side-facing elastic connecting portion (15a). The second connecting piece (16) is connected to the other end of the high-voltage diode (14) and has a downward-facing connecting hole (16a).

3. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 2, characterized in that: A high-pressure sheath (17) is installed on the high-pressure head (4), and a high-pressure spring (18) is installed longitudinally inside the high-pressure sheath (17).

4. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 3, characterized in that: The high-voltage head (4) is provided with a suppression resistor (19) and a high-voltage pin (20). The high-voltage pin (20) is connected to the upper end of the high-voltage spring (18). The lower end of the suppression resistor (19) is connected to the high-voltage pin (20). The upper end of the suppression resistor (19) passes through the connection hole (16a) of the second connecting piece (16).

5. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 2, characterized in that: The coil assembly includes a T-shaped iron core (7), a primary frame (8) sleeved on the outside of the T-shaped iron core (7), a secondary frame (9) sleeved on the primary frame (8), a first C-shaped iron core (10) and a second C-shaped iron core (11) surrounding the outside of the secondary frame (9). The first C-shaped iron core (10) and the second C-shaped iron core (11) are combined together to form an O-shape and are respectively connected to the end of the T-shaped iron core (7).

6. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 5, characterized in that: The secondary frame (9) is wound with a secondary winding. The high-voltage end of the secondary frame (9) is provided with a negative high-voltage plug (12), and the low-voltage end of the secondary frame (9) is provided with a positive high-voltage plug (13). One end of the secondary winding is connected to the negative high-voltage plug (12), and the other end is connected to the positive high-voltage plug (13). When the coil assembly is installed in the second cavity (1b), the negative high-voltage plug (12) is elastically pressed by the elastic connecting part (15a) of the first connecting piece (15), and the positive high-voltage plug (13) is connected to the ignition module (5).

7. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 6, characterized in that: The negative high voltage plug (12) is located on the rear side of the secondary frame (9), and the positive high voltage plug (13) is located on the front side of the secondary frame (9).

8. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 5, characterized in that: The secondary frame (9) is provided with a slot (9a) at its end, and the first C-type iron core (10) and the second C-type iron core (11) have interconnecting ends (10a, 11a) at their side ends. The interconnecting ends (10a, 11a) of the first C-type iron core (10) and the second C-type iron core (11) are connected together in the slot (9a).

9. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 8, characterized in that: The top surface of the T-shaped iron core (7) and the interconnecting ends (10a, 11a) are attracted together by a magnetic sheet (21).

10. The low-induction voltage overhead single-cylinder independent ignition coil according to claim 5, characterized in that: The first C-type iron core (10) and the second C-type iron core (11) are wrapped with a buffer cover.

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