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Spark plug for removing residual exhaust gas and associated combustion chamber

A technology of spark plug and pre-combustion chamber, applied in the field of fuel ignition system

Active Publication Date: 2014-07-23
CUMMINS INTPROP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The subject matter of this application is made with respect to the prior art, and in particular to the problems and needs in the prior art within combustion chambers and spark plugs that have not been fully addressed by currently available combustion chambers and spark plugs

Method used

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  • Spark plug for removing residual exhaust gas and associated combustion chamber
  • Spark plug for removing residual exhaust gas and associated combustion chamber
  • Spark plug for removing residual exhaust gas and associated combustion chamber

Examples

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Embodiment Construction

[0034] Reference throughout this specification to "one embodiment," "an embodiment," or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in one embodiment," "in an embodiment," and similar phrases throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0035] refer to figure 1 and figure 2 , shows a spark plug 10 according to one embodiment, comprising an outer ground electrode portion 20 with a plurality of outer ground electrodes 22 . The external ground electrode 22 may be defined as an external anode or anode electrode. The spark plug 10 may further include a central cathode electrode 30 around which the outer ground electrode 22 is located. Generally, the outer electrode 22 partially surrounds the central electrode 30 at least laterally or lies laterally around the central electrode 30 . In othe...

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Abstract

A spark plug (10), and associated systems, for an internal combustion engine includes a central electrode (30) that terminates at a first distal end surface (24) defined about a central axis (14). The spark plug also includes at least one outer electrode (22) that terminates at a second distal end surface. The at least one outer electrode (22) at least partially laterally surrounds the central electrode (30) such that the second distal end surface is radially offset relative to the central electrode (30) and a lateral gap (40) is defined between the central electrode (30) and the at least one outer electrode (22). The spark plug (10) includes features that force or redirect movement of the flow of the fresh air-fuel mixture through the lateral gap (40) to help to purge or move the residual exhaust gases left over from a previous combustion event out of the lateral gap.

Description

technical field [0001] The subject matter of the present application relates generally to internal combustion engines and, more particularly, to fuel ignition systems for internal combustion engines. Background technique [0002] Spark plugs are designed for use with various types of combustion chambers configured to ignite a flammable mixture of fuel and air. Some combustor configurations include passive pre-chambers, open combustors, and fuel-fed pre-chambers. Existing spark plug designs suffer from various disadvantages which may be exacerbated depending on the type of combustion chamber configured to operate within the spark plug. [0003] It is well known that a spark plug is used in combination with a pre-chamber and an open combustion chamber to ignite a combustion event in an internal combustion engine. The pre-chamber is particularly useful for flame ignition and propagation of premixed lean-burn natural gas engines, which are difficult to ignite using conventiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/32F02P13/00
CPCH01T13/20H01T13/467F02P13/00H01T13/32F02B19/12Y02T10/12H01T13/46
Inventor K·J·道格拉斯秦霄D·J·奥康纳P·萨西德哈兰
Owner CUMMINS INTPROP INC
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