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Double-discharge mode plasma igniter with eccentric double-anode structure

A discharge mode and plasma technology, applied in the power field, can solve the problems of poor ignition reliability, low ignition energy utilization, affecting electrode life, etc., and achieve the effects of wide lean burn limit, high working pressure and high reactivity

Inactive Publication Date: 2019-01-22
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The discharge of existing spark plugs is often accompanied by a high temperature rise, which easily leads to low ignition energy utilization and affects the life of the electrodes; the ignition range is only located in the narrow space between the center electrode and the side electrodes, and is applied to large-bore engines or difficult to ignite. When using fuel (such as natural gas), the ignition reliability is likely to deteriorate due to too small ignition energy

Method used

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  • Double-discharge mode plasma igniter with eccentric double-anode structure
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  • Double-discharge mode plasma igniter with eccentric double-anode structure

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Embodiment 1

[0018] Embodiment 1: In order to solve the problem that the existing spark plug / igniter is applied on a large-space combustion chamber engine, and further solve the problems of low ignition energy, poor ignition reliability, and low ignition energy utilization rate when applied to a natural gas engine, the present invention proposes The following technical scheme: a double discharge mode plasma igniter with an eccentric double anode structure, the scheme structure is as follows figure 2 As shown, it includes a short anode 1, a long anode 2, an anode insulation positioning sleeve 4, and a ground electrode 5. The anode insulating positioning sleeve is installed in the ground electrode 5, and the short anode 1 and the long anode 2 are respectively installed in the installation groove and the installation hole of the anode insulating positioning sleeve, wherein the short anode 1 is completely wrapped by the anode insulating positioning sleeve, and the long anode A part of the ano...

Embodiment 2

[0019] Embodiment 2: A double discharge mode plasma igniter with an eccentric double anode structure, including a housing, a long anode 2, a short anode 1, an anode insulation positioning sleeve and a ground electrode 5, and a ground electrode 5 is installed in the housing , the grounding electrode 5 surrounds and forms a concave hollow cylinder, the hollow cylinder has a gradually decreasing diameter from top to bottom, and is divided into two parts, and the connection between the upper part and the lower part is due to the rapid decrease in the diameter value. The horizontal ring wall is formed by the ground electrode 5, and the diameter reduction of the lower part is formed by increasing the horizontal width of the ground electrode 5 inside the short groove 13, and the ground electrode 5 on the insulating side wall 14 side The horizontal width is basically the same. The lower part has a first diameter maintaining section 9, a first diameter decreasing section 10, a second d...

Embodiment 3

[0022] Embodiment 3: This scheme involves that the igniter is mainly composed of a short anode, a long anode, an anode insulation positioning sleeve, and a grounding electrode. It can be the igniter described in Embodiment 1 or 2. The ignition method is as follows:

[0023] Since the igniter communicates with the engine combustion chamber, a combustible air-fuel mixture exists in the ionized space.

[0024] The short anode and the long anode are separately powered by the power supply. When working, the power supply first supplies power at a lower voltage (for example: below 10,000 volts); at a lower voltage, short anode-anode insulation positioning sleeve-ground electrode, long anode-anode insulation positioning sleeve-ground electrode all occur Dielectric barrier discharge, dielectric barrier discharge occurs in the first ionized space. The gas in the first ionization space is ionized under the action of an external electric field to generate non-equilibrium plasma composed ...

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Abstract

The invention discloses a double-discharge mode plasma igniter with an eccentric double-anode structure, belongs to the field of power and aims to realize dielectric barrier discharge and arc discharge and spatially take compactness into consideration. The double-discharge mode plasma igniter comprises a shell, a long anode, a short anode, an anode insulation positioning sleeve and grounding electrodes, the grounding electrodes are mounted in the shell and connected in a surrounding manner to form a recessed hollow column, the diameter of the hollow column is gradually decreased from top to bottom, the hollow column is divided into two portions, the upper portion and the lower portion are connected to form a horizontal ring wall by the aid of the grounding electrodes owing to rapid decrease of the diameters of the upper portion and the lower portion, the diameter of the lower portion is decreased as the horizontal width of the grounding electrode in a short slot is increased, the horizontal widths of the grounding electrodes on insulation side walls are basically the same, compactness is spatially taken into consideration, two types of discharge can be realized, the internal structure of the igniter is necessarily eccentric, and then the igniter can simultaneously achieve two effects.

Description

technical field [0001] The invention belongs to the field of power, and relates to a double-discharge mode plasma igniter with an eccentric double-anode structure. Background technique [0002] As a clean energy, natural gas has been widely used as engine fuel. In the field of vehicle power, the number of passenger cars and heavy-duty vehicles fueled by CNG is increasing; in the field of ship power, CNG and LNG-powered ships have become the key research direction in the "Made in China 2025" plan. Compared with gasoline, natural gas as a gas fuel requires greater ignition energy, which makes it difficult to use a single spark plug to ignite natural gas even for small-bore vehicle natural gas engines in actual use, so gasoline has to be used to ignite the engine. normal work. This has led to a series of problems such as system complexity, cost increase, and reliability decrease. Therefore, it is necessary to adopt a new ignition technology and adopt a relatively simple stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P23/04H05H1/24H05H1/48
CPCF02P23/04H05H1/2406H05H1/48
Inventor 宋鹏
Owner DALIAN NATIONALITIES UNIVERSITY
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