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Spark plug

A spark plug and diversion channel technology, applied in the field of spark plugs, can solve problems such as engine damage, and achieve the effects of stable power output, improved stability, and environmental protection of emissions

Active Publication Date: 2016-06-01
张蝶儿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation will keep repeating, and a surge phenomenon will be formed. The larger the capacity of the pipeline space, the stronger the surge will be. If this surge and the vibration of the engine form resonance, it will cause a very large damage to the engine s damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Please also see image 3 and Figure 4 ,in, image 3 It is a structural schematic diagram of Embodiment 1 of the spark plug of the present invention, Figure 4 It is a connection schematic diagram of the center electrode of the spark plug in this embodiment. The spark plug 30 includes a center electrode 31 , an insulator 32 , a shell 33 , a flow guiding insert 34 and a ground electrode 35 .

[0049] The insulator 32 is a ceramic insulator with a shaft hole extending along the axis. The center electrode 31 is inserted through the shaft hole of the insulator 34 and exposes its end portion 311 . The shell 33 is a hollow structure and is sheathed on the surface of the insulator 32 .

[0050] The inside of the guide insert 34 has a guide channel 341, the front end of the guide channel 341 is facing the end of the central electrode, and the rear end is located at the open end of the housing 33; the cross-sectional size of the guide channel 341 is from front to back Both...

Embodiment 2

[0065] The spark plug of the second embodiment is substantially the same as that of the first embodiment, the only difference being that the outer wall of the flow guiding insert of the spark plug has been improved. see Figure 9 , which is a schematic diagram of the structure of the guide channel of the embodiment 2 of the spark plug of the present invention.

[0066] In order to realize the full mixing of the gas in the annular space and the separation and interception, the dynamic pressure of the gas flow in the area is changed. In this embodiment, the outer wall of the flow guiding insert is optimally designed. The outer wall of the guide insert is provided with ribs arranged at intervals, and the distance between the ribs and the inner wall of the housing gradually increases from the center electrode to the direction of the combustion chamber. At the same time, the annular space is divided into multiple spaces by the rib, so as to separate and intercept the gas flow in ...

Embodiment 3

[0069] The spark plug of the third embodiment is substantially the same as the spark plug of the first embodiment, the only difference being that the inside of the guide insert of the spark plug has been deformed and improved. see Figure 10 , which is a structural schematic diagram of the guide channel of the third embodiment of the spark plug of the present invention.

[0070] In this embodiment, a baffle 343 is provided in the flow guide passage 341 inside the flow guide insert 34, and a through hole 3431 is provided on the baffle 343, and the aperture of the through hole 3431 goes along the center electrode toward the combustion chamber. Room A direction gradually decreases. One end of the through hole 3431 facing the combustion chamber A forms the narrow throat.

[0071] Also, see Figure 11 , which is a schematic diagram of the deformation structure of the flow guide insert in the third embodiment. As another variation of this embodiment, the area of ​​the through ho...

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PUM

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Abstract

The invention relates to a spark plug. The spark plug comprises an insulator which has an axial hole extending in the axis direction; a central electrode, wherein the central electrode is inserted into the axial hole penetrating through the insulator, and the end part of the central electrode is exposed; a housing which is in a hollow column shape and sleeves the surface of the insulator; a flow guiding inserting piece, wherein a flow guiding channel is formed in the flow guiding inserting piece, the front end of the flow guiding channel right faces the end part of the central electrode, the rear end is arranged on an open end of the housing, the size of the section of the flow guiding channel is gradually reduced from front and back two ends to the middle part until a narrow throat is formed on the middle part, the outer wall of the flow guiding inserting piece and the inner wall of the housing are separated to form an annular space, and the flow guiding channel is communicated with the annular space; and a grounding electrode, wherein the grounding electrode is arranged on the inner wall of the housing or the flow guiding inserting piece, and an ignition end part with a spark discharging gap is formed between the grounding electrode and the end part of the central electrode. Compared with the prior art, the spark plug provided by the invention can effectively avoid a surge phenomenon of a pressurized injection type spark plug.

Description

technical field [0001] The invention relates to the ignition field of an internal combustion engine, in particular to a spark plug. Background technique [0002] The internal combustion engine mixes liquid or gaseous fuel with air, and directly inputs it into the high-pressure combustion chamber inside the cylinder to generate power. It is a heat engine that converts thermal energy into mechanical energy. The spark plug is installed on the internal combustion engine to ignite the mixed gas in the combustion chamber. [0003] see figure 1 , which is a schematic structural diagram of the spark plug 10 in the prior art. The spark plug 10 includes a center electrode 11 , an insulator 12 , a casing 13 and a ground electrode 14 . The insulator 12 is a ceramic insulator with an axis hole extending along the axis, and the center electrode 11 is inserted through the axis hole of the insulator 12 . The casing 13 is disposed on the outer periphery of the insulator 12 . The ground...

Claims

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Application Information

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IPC IPC(8): H01T13/00H01T13/04H01T13/20
Inventor 张蝶儿
Owner 张蝶儿