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Step type spark plug

A spark plug and spark gap technology, used in the field of spark plugs, can solve problems such as being unsuitable to ensure a stable combustion process, incomplete combustion process, misfire, etc., and achieve the effects of preventing incomplete combustion or even flameout, reducing fuel combustion and long service life.

Inactive Publication Date: 2011-05-25
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If during ignition the optimum ignitable mixture is not present in the spark gap area, this can lead to a slow or incomplete combustion process and in the worst case even misfire
[0013] In this regard, when the fuel-air mixture (combustible gas mixture) changes due to tolerances or changes from one operating cycle to the next, e.g. conventional spark plugs and with side or auxiliary electrodes for preventing soot deposits The spark plugs are not suitable for ensuring a robust combustion process

Method used

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  • Step type spark plug
  • Step type spark plug
  • Step type spark plug

Examples

Experimental program
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Embodiment Construction

[0031] Figure 1 to Figure 3 Shown is a spark plug 1 comprising a center electrode 2 and a top electrode 3 as well as at least two side electrodes 4, 6 as ground electrodes, both side electrodes 4, 6 and top electrode 3 having exposed sides oriented towards the center electrode 2 (face edge) 7, 8, 9. The side electrodes 4 , 6 embodied as ground electrodes are each arranged with their exposed sides 8 , 9 around the central axis X of the central electrode 2 with lateral spacing, and they are axially spaced apart from each other in such a way Such that the respective exposed sides 7 , 8 , 9 are each arranged at different height levels, so that the spark gaps 11 , 12 , 13 formed are all spatially independent of each other.

[0032] The selected view means that only side electrode 4 of side electrodes 4 and 6 is fully visible. As for the side electrodes 6, only the end faces (indicated by dotted lines) of their exposed sides 9 can be seen.

[0033] The center electrode 2 is arra...

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Abstract

The invention relates to a spark plug having a central electrode (2) and a cover electrode (3) as ground electrode (3, 4, 6) and at least two side electrodes (4, 6). Both the side electrodes (4, 6) and the cover electrode (3) have free front edges (7, 8, 9) oriented in direction to the central electrode (2). The side electrodes (4, 6) of the ground electrode are arranged with their free front edges () 7, 8, 9 around a central axis X of the central electrode (2) such that the free front edges are arranged at different height levels so that ignition slots (11, 12, 13) are formed independently from each other.

Description

technical field [0001] The present invention relates to a spark plug comprising a center electrode, a top electrode and at least two side electrodes as ground electrodes, each of the side electrodes and the top electrode having an exposed face edge oriented towards the center electrode. Background technique [0002] DE 25 54 517 A1 relates to a spark plug for an internal combustion engine having a cylindrical spark plug housing and a spark plug insulator mounted therein in a gas-tight manner, a central electrode extending axially through the spark plug insulator and extending from the spark plug housing to An inner radially extending ground electrode has one or more auxiliary electrodes disposed between opposed spaced apart ends thereof. In order to prolong the ignition spark and ensure its penetration deeper into the combustible mixture and at the same time to obtain the maximum possible density of the protracted ignition spark, DE 25 54 517 A1 proposes to connect at least ...

Claims

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Application Information

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IPC IPC(8): H01T13/20H01T13/46F02P13/00
CPCH01T13/467
Inventor M·K·施普林格H·H·鲁兰T·洛伦茨G·卢旺J·梅林
Owner FORD GLOBAL TECH LLC
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