SERIES CLEARANCE MULTI-POINT DISCHARGING SPARKING PLUG

Abstract

The present invention relates to a series clearance multi-point discharging spark plug for a spark ignition engine, including a wiring screw. The wiring screw is arranged in an insulator. A central electrode is arranged in a tip of the insulator. A built-in damping resistor is arranged between the central electrode and the wiring screw. A ceramic multi-point discharging ignition table fitted with the insulator is arranged at a bottom of the insulator. A cavity assembly is formed between the ceramic multi-point discharging ignition table and the insulator. An outer wall at an upper end of the ceramic multi-point discharging ignition table is fastened to the shell. An ignition electrode assembly is arranged at the bottom of the ceramic multi-point discharging ignition table. The series clearance multi-point discharging spark plug increases temperature and pressure of mixed gas during ignition, thereby improving ignition performance, shortening combustion duration and improving engine performance.

Claims

1. A series clearance multi-point discharging spark plug, comprising a wiring screw (1); wherein the wiring screw (1) is arranged in an insulator (2); the insulator (2) is riveted in a shell (3); a central electrode (4) is arranged in a tip of the insulator (2); a built-in damping resistor (5) is arranged between the central electrode (4) and the wiring screw (1); a ceramic multi-point discharging ignition table (6) fitted with the insulator (2) is arranged at a bottom of the insulator (2); a cavity assembly is formed between the ceramic multi-point discharging ignition table (6) and the insulator (2); an outer wall at an upper end of the ceramic multi-point discharging ignition table (6) is fastened to the shell (3); an ignition electrode assembly is arranged at the bottom of the ceramic multi-point discharging ignition table (6); the cavity assembly comprises a positive-pole high-voltage connecting cavity (7); the bottom of the insulator (2) extends to the ceramic multi-point discharging ignition table (6); the positive-pole high-voltage connecting cavity (7) is arranged between the bottom of the insulator (2) and the ceramic multi-point discharging ignition table (6); the bottom of the central electrode (4) extends from the insulator (2); the bottom of the positive-pole high-voltage connecting cavity (7) is provided with a positive-pole high-voltage electrode connecting line (8) fitted with the bottom of the central electrode (4); the positive-pole high-voltage electrode connecting line (8) is arranged in the ceramic multi-point discharging ignition table (6); or the cavity assembly comprises a labyrinth type positive-pole high-voltage connecting cavity (9) and a labyrinth type positive-pole high-voltage electrode connecting line (10); the bottom of the insulator (2) extends to the ceramic multi-point discharging ignition table (6); the labyrinth type positive-pole high-voltage connecting cavity (7) is arranged between the bottom of the insulator (2) and the ceramic multi-point discharging ignition table (6); a lug boss (11) is arranged in a central position of the labyrinth type positive-pole high-voltage connecting cavity (9); the lug boss (11) extends to the bottom of the insulator (2); the labyrinth type positive-pole high-voltage electrode connecting line (10) is arranged in the central position of the lug boss (11); the labyrinth type positive-pole high-voltage electrode connecting line (10) is fitted with the bottom of the central electrode (4); the labyrinth type positive-pole high-voltage electrode connecting line (10) is arranged in the ceramic multi-point discharging ignition table (6); the lug boss (11) and the ceramic multi-point discharging ignition table (6) are integrally distributed; the ignition electrode assembly comprises a grounding electrode (13) and a positive electrode (15); the positive electrode (15) is connected with the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10); a discharging ignition clearance (16) is formed between the grounding electrode (13) and the positive electrode (15); the grounding electrode (13) and the positive electrode (15) are communicated respectively through a built-in electrode connecting line (17); or the ignition electrode assembly comprises a positive electrode I (19), at least one bridging electrode (20) and a grounding electrode I (21); the positive electrode I (19) is connected with the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10); the positive electrode I (19) and the bridging electrode (20) are communicated respectively through a built-in electrode connecting line I (22); discharging ignition clearances I (23) are respectively formed between the positive electrode I (19) and the bridging electrode (20) and between the grounding electrode I (21) and the bridging electrode (20); the grounding electrode (13) and the grounding electrode I (21) are respectively contacted with the shell; and the built-in electrode connecting line (17) and the built-in electrode connecting line I (22) are arranged in the ceramic multi-point discharging ignition table (6).

2. The series clearance multi-point discharging spark plug according to claim 1, wherein an outer sealing gasket (24) is sleeved at a middle end of an outer wall of the shell (3); an inner sealing gasket (25) is formed between the insulator (2) and the shell (3); the inner sealing gasket (25) is distributed obliquely; a side heat radiating contact surface (26) is formed between the outer wall of the upper end of the ceramic multi-point discharging ignition table (6) and the shell (3); a bottom heat radiating contact surface (27) is formed between the ceramic multi-point discharging ignition table (6) and the bottom of the shell (3); and a flexible sealing gasket (28) is arranged between an upper part of the ceramic multi-point discharging ignition table (6) and the shell (3).

3. The series clearance multi-point discharging spark plug according to claim 1, wherein uniformly distributed creepage umbrella ridges (29) are arranged at an outer wall of a lower end of the ceramic multi-point discharging ignition table (6); and a lower end of the ceramic multi-point discharging ignition table (6) is cylindrical or pyramidal.

4. The series clearance multi-point discharging spark plug according to claim 2, wherein uniformly distributed creepage umbrella ridges (29) are arranged at an outer wall of a lower end of the ceramic multi-point discharging ignition table (6); and a lower end of the ceramic multi-point discharging ignition table (6) is cylindrical or pyramidal.

5. The series clearance multi-point discharging spark plug according to claim 1, wherein the bridging electrode (20) is distributed in an arc shape; a spacing of the discharging ignition clearance (16) and a spacing of the discharging ignition clearance I (23) are 0.3-5.0 mm; the built-in electrode connecting line (17) and the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10) are integrally distributed; and the built-in electrode connecting line I (22) and the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10) are integrally distributed.

6. The series clearance multi-point discharging spark plug according to claim 2, wherein the bridging electrode (20) is distributed in an arc shape; a spacing of the discharging ignition clearance (16) and a spacing of the discharging ignition clearance I (23) are 0.3-5.0 mm; the built-in electrode connecting line (17) and the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10) are integrally distributed; and the built-in electrode connecting line I (22) and the positive-pole high-voltage electrode connecting line (8) or the labyrinth type positive-pole high-voltage electrode connecting line (10) are integrally distributed.

7. The series clearance multi-point discharging spark plug according to claim 1, wherein two bridging electrodes (20) are arranged; and the discharging ignition clearance I (23) is arranged between adjacent bridging electrodes (20).

8. The series clearance multi-point discharging spark plug according to claim 2, wherein two bridging electrodes (20) are arranged; and the discharging ignition clearance I (23) is arranged between adjacent bridging electrodes (20).

Description

BRIEF DESCRIPTION OF DRAWINGS

[0036] FIG. 1 is a sectional structural schematic diagram of the present invention;

[0037] FIG. 2 is a bottom structural schematic diagram of FIG. 1;

[0038] FIG. 3 is a position distribution diagram of a single-point creepage discharging ignition electrode in the present invention;

[0039] FIG. 4 is a position distribution diagram of a double-point creepage discharging ignition electrode in the present invention;

[0040] FIG. 5 is a position distribution diagram of a three-point creepage discharging ignition electrode in the present invention;

[0041] FIG. 6 is a standard type structural schematic diagram of the present invention;

[0042] FIG. 7 is a riveting type structural schematic diagram of the present invention; and

[0043] FIG. 8 is a quick heat radiation type structural schematic diagram of the present invention.

PREFERRED EMBODIMENTS OF THE INVENTION

[0044] Technical solutions of the present invention will be further described below in detail through embodiments in combination with drawings.

Embodiment 1

[0045] As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7 and FIG. 8, a series clearance multi-point discharging spark plug comprises a wiring screw 1. The wiring screw 1 is arranged in an insulator 2. The insulator 2 is riveted in a shell 3. A central electrode 4 is arranged in a tip of the insulator 2. A built-in damping resistor 5 is arranged between the central electrode 4 and the wiring screw 1. A ceramic multi-point discharging ignition table 6 fitted with the insulator 2 is arranged at a bottom of the insulator 2. A cavity assembly is formed between the ceramic multi-point discharging ignition table 6 and the insulator 2. An outer wall at an upper end of the ceramic multi-point discharging ignition table 6 is fastened to the shell 3. An ignition electrode assembly is arranged at the bottom of the ceramic multi-point discharging ignition table 6. The cavity assembly comprises a positive-pole high-voltage connecting cavity 7. The bottom of the insulator 2 extends to the ceramic multi-point discharging ignition table 6. The positive-pole high-voltage connecting cavity 7 is arranged between the bottom of the insulator 2 and the ceramic multi-point discharging ignition table 6. The bottom of the central electrode 4 extends from the insulator 2. The bottom of the positive-pole high-voltage connecting cavity 7 is provided with a positive-pole high-voltage electrode connecting line 8 fitted with the bottom of the central electrode 4. The positive-pole high-voltage electrode connecting line 8 is arranged in the ceramic multi-point discharging ignition table 6. Or the cavity assembly comprises a labyrinth type positive-pole high-voltage connecting cavity 9 and a labyrinth type positive-pole high-voltage electrode connecting line 10. The bottom of the insulator 2 extends to the ceramic multi-point discharging ignition table 6. The labyrinth type positive-pole high-voltage connecting cavity 7 is arranged between the bottom of the insulator 2 and the ceramic multi-point discharging ignition table 6. A lug boss 11 is arranged in a central position of the labyrinth type positive-pole high-voltage connecting cavity 9. The lug boss 11 extends to the bottom of the insulator 2. The labyrinth type positive-pole high-voltage electrode connecting line 10 is arranged in the central position of the lug boss 11. The labyrinth type positive-pole high-voltage electrode connecting line 10 is fitted with the bottom of the central electrode 4. The labyrinth type positive-pole high-voltage electrode connecting line 10 is arranged in the ceramic multi-point discharging ignition table 6. The lug boss 11 and the ceramic multi-point discharging ignition table 6 are integrally distributed. The ignition electrode assembly comprises a grounding electrode 13 and a positive electrode 15. The positive electrode 15 is connected with the positive-pole high-voltage electrode connecting line 8 or the labyrinth type positive-pole high-voltage electrode connecting line 10. A discharging ignition clearance 16 is formed between the grounding electrode 13 and the positive electrode 15. The grounding electrode 13 and the positive electrode 15 are communicated respectively through a built-in electrode connecting line 17. Or the ignition electrode assembly comprises a positive electrode 119, at least one bridging electrode 20 and a grounding electrode I 21. The positive electrode 119 is connected with the positive-pole high-voltage electrode connecting line 8 or the labyrinth type positive-pole high-voltage electrode connecting line 10. The positive electrode 119 and the bridging electrode 20 are communicated respectively through a built-in electrode connecting line I 22. Discharging ignition clearances 123 are respectively formed between the positive electrode 119 and the bridging electrode 20 and between the grounding electrode I 21 and the bridging electrode 20. The grounding electrode 13 and the grounding electrode I 21 are respectively contacted with the shell. The built-in electrode connecting line 17 and the built-in electrode connecting line 122 are arranged in the ceramic multi-point discharging ignition table 6. An outer sealing gasket 24 is sleeved at a middle end of an outer wall of the shell 3. An inner sealing gasket 25 is formed between the insulator 2 and the shell 3. The inner sealing gasket 25 is distributed obliquely. A side heat radiating contact surface 26 is formed between the outer wall of the upper end of the ceramic multi-point discharging ignition table 6 and the shell 3. A bottom heat radiating contact surface 27 is formed between the ceramic multi-point discharging ignition table 6 and the bottom of the shell 3. A flexible sealing gasket 28 is arranged between an upper part of the ceramic multi-point discharging ignition table 6 and the shell 3.

[0046] Uniformly distributed creepage umbrella ridges (29) are arranged at an outer wall of a lower end of the ceramic multi-point discharging ignition table 6. A lower end of the ceramic multi-point discharging ignition table 6 presents cylindrical or pyramidal. The bridging electrode 20 is distributed in an arc shape. A spacing of the discharging ignition clearance 16 and a spacing of the discharging ignition clearance I 23 are 0.3-5.0 mm. The built-in electrode connecting line 17 and the positive-pole high-voltage electrode connecting line 8 or the labyrinth type positive-pole high-voltage electrode connecting line 10 are integrally distributed. The built-in electrode connecting line 122 and the positive-pole high-voltage electrode connecting line 8 or the labyrinth type positive-pole high-voltage electrode connecting line 10 are integrally distributed. Two bridging electrodes 20 are arranged. The discharging ignition clearance 123 is arranged between adjacent bridging electrodes 20.