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Plasma spark plug for an internal combustion engine

A technology for spark plugs and internal combustion engines, which is applied in the direction of plasma, spark plugs, spark plugs, etc., and can solve problems such as difficult coordination of electromagnetic shielding and insulation

Inactive Publication Date: 2012-06-20
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, it is difficult to coordinate the electromagnetic shield with the insulation between the mandrel and the cover

Method used

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  • Plasma spark plug for an internal combustion engine
  • Plasma spark plug for an internal combustion engine
  • Plasma spark plug for an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0024] Such as figure 1 As shown, the generally substantially cylindrical RF plasma spark plug 1 mainly includes a bottom substantially capacitive portion C and a top substantially inductive portion I, the portions C and I being substantially elongated, connected in series and comprising a common The longitudinal axis Z.

[0025] The substantially capacitive part C comprises in particular a casing 2 designed to be grounded and surround a substantially cylindrical central electrode 3 having an axis Z and functioning as a high voltage electrode. An electrically insulating block called an "insulator" 4 is placed between the housing 2 and the center electrode 3 , the insulator 4 being configured to guide the spark between the electrodes 2 and 3 . In a manner well known in the prior art, the housing 2 has, on its bottom outer surface closest to the stud of the internal combustion engine on which the spark plug 1 is arranged, a shape suitable for mounting, holding and fastening the...

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PUM

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Abstract

The invention relates to an essentially-elongated spark plug for the internal combustion engine of a motor vehicle, consisting of: an essentially-capacitive (C) lower part comprising two coaxial electrodes (2, 3); an essentially-inductive (I) upper part comprising a central mandrel (8), a coaxial winding (5) around the mandrel (8) and an external tubular casing (61) which serves as electromagnetic armour; and an insulant (7) which is disposed radially between the casing (61) and the winding (5). The invention is characterised in that the essentially-inductive upper part (I) comprises a secondinternal casing (62) of electromagnetic armour, which is disposed radially between the insulant (7) and the external casing (61).

Description

technical field [0001] The invention relates to a plasma-generating spark plug, in particular for igniting an internal combustion engine by means of an electric spark between electrodes of the spark plug. [0002] More particularly, the present invention relates to a spark plug for an internal combustion engine comprising two plasma generating electrodes separated by an insulator, each forming a housing around the insulator, and a center electrode accommodated in a center hole of the insulator. Background technique [0003] In publications FR2859830, FR2859569, FR2859831 multisparkplugs have an electromagnetic shield embodied as a metal cover which can be formed eg in the form of a thin tube or a thin deposited layer or a metallized and plated plastic film . [0004] Electromagnetic shielding consists of two parts: electrical shielding and magnetic shielding. The electrical shielding makes it possible to protect the environment of the spark plug from disturbances caused by...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/52H05H1/24F02P13/00H01T13/44
CPCH01T13/44
Inventor X·雅弗勒齐克A·阿涅雷
Owner RENAULT SA