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Corona igniter with improved corona control

An igniter and corona discharge technology, applied in corona discharge devices, circuits, spark plugs, etc., can solve problems such as reducing the ignition quality at the ignition end of the center electrode and generating arcs

Active Publication Date: 2013-07-17
FEDERAL MOGUL IGNITION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This conductive path through the insulator can also cause arcing between components which is usually unwanted and degrades the quality of ignition at the firing end of the center electrode

Method used

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  • Corona igniter with improved corona control
  • Corona igniter with improved corona control
  • Corona igniter with improved corona control

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Experimental program
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Effect test

Embodiment Construction

[0025] As shown in FIG. 1 , according to one aspect of the present invention, a corona igniter 20 for a corona discharge ignition system is provided. The system intentionally forms a power source that suppresses the formation of arcs and promotes the generation of the strong electric fields used to create the corona. The corona discharge ignition system will cause a multi-channel discharge with a frequency of about 1 MHz after ignition.

[0026] The igniter 20 of the system includes a center electrode 22 for receiving energy from a high radio frequency voltage and emitting a radio frequency electric field to ionize a partially combustible fuel-air mixture in the combustion chamber 26 of the internal combustion engine and to Corona discharge 24 is provided in 26 . Corona igniter 20 is assembled in such a way that the gap between center electrode 22, insulator 32 and housing 36 forms a small air gap. The assembly method first includes: inserting the center electrode 22 into th...

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Abstract

A corona igniter 20 includes an electrode gap 28 between the central electrode 22 and the insulator 32 and a shell gap 30 between the insulator 32 and the shell 36. The gaps 28, 30 are filled with a filler material 40 to prevent corona discharge 24 in the gaps 28, 30 and to concentrate the energy at a firing tip 58 of the central electrode 22. The filler material 40 may be electrically insulating or conductive. The shell gap width ws may be greatest at a shell lower end 92. The shell gap 30 may also be in a turnover region between a shell upper end 44 and the insulator 32, in which case the filler material 40 is injection molded around the turnover region. During operation of the igniter 20, the filler material 40 provides a reduced voltage drop across the gap 28, 30.

Description

technical field [0001] The present invention generally relates to a corona igniter for emitting a radio frequency electric field to ionize a fuel-air mixture and provide a corona discharge, and a method of making the corona igniter. Background technique [0002] The corona discharge ignition system provides alternating voltage and current to switch high and low potential electrodes continuously and rapidly, thus making it difficult for the arc to form and promoting the formation of corona discharge. The system consists of a corona igniter with a central electrode charged to a high RF potential and generating a strong RF electric field in the combustion chamber. This electric field ionizes a portion of the fuel and air mixture in the combustion chamber and initiates dielectric breakdown, thereby promoting combustion of the fuel-air mixture. The electric field is preferably controllable so that the fuel-air mixture maintains dielectric properties and a corona discharge (also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/50H01T21/02
CPCH01T21/02H01T13/50Y10T29/4902H01T19/00
Inventor 约翰·A·鲍里斯詹姆斯·D·吕科瓦基基斯·汉普顿
Owner FEDERAL MOGUL IGNITION
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