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Ignition method for double-discharge mode plasma igniter with eccentric double-anode structure

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

Inactive Publication Date: 2019-01-15
DALIAN NATIONALITIES UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Ignition method for double-discharge mode plasma igniter with eccentric double-anode structure
  • Ignition method for double-discharge mode plasma igniter with eccentric double-anode structure
  • Ignition method for double-discharge mode plasma igniter with eccentric double-anode structure

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Embodiment 1

[0013] 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, 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 anode...

Embodiment 2

[0014] 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 on the side of the short groove 13, and the ground on the side of the insulating side wall 14 The horizontal width of the electrodes 5 is basically the same. The lower part has a first diameter maintaining section 9, a first diameter decreasing...

Embodiment 3

[0017] 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:

[0018] Since the igniter communicates with the engine combustion chamber, a combustible air-fuel mixture exists in the ionized space.

[0019] 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 an ignition method for a double-discharge mode plasma igniter with an eccentric double-anode structure, which belongs to the power field. In order to realize dielectric barrierdischarge and arc discharge, a short anode and a long anode are powered separately by a power supply, the ignition is started, the power supply provides power at low voltage to enable dielectric barrier discharge to happen between the short anode and a grounding electrode through isolation, the long anode and the grounding electrode are isolated by an anode insulating positioning sleeve to enabledielectric barrier discharge to happen, unbalanced plasma is generated in first ionization space, the dielectric barrier discharge generates flow field disturbance and heating on gases, the already-ionized gases move downwardly to second ionization space, the voltage of the power supply rises and the power supply only provides power for the long anode, arc discharge thus happens between the grounding electrode and the long anode, ignition and a combustion reaction happen rapidly to the mixed gases located in the second ionization space, the compactness in space is considered, two kinds of discharge are realized necessarily, and in order to have both effects, the internal structure needs to be eccentric.

Description

technical field [0001] The invention belongs to the field of power, and relates to an ignition method of 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02P23/00H05H1/24H05H1/32
CPCF02P23/00H05H1/2406H05H1/32
Inventor 宋鹏
Owner DALIAN NATIONALITIES UNIVERSITY
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