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Spark plugs and associated combustion chambers for sweeping residual exhaust gases

A technology for spark plugs and internal combustion engines, applied in the direction of spark plugs, spark plugs, combustion engines, etc.

Active Publication Date: 2017-03-22
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 plugs and associated combustion chambers for sweeping residual exhaust gases
  • Spark plugs and associated combustion chambers for sweeping residual exhaust gases
  • Spark plugs and associated combustion chambers for sweeping residual exhaust gases

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

The present invention relates to a spark plug (10) and associated system for an internal combustion engine, comprising a center electrode (30) that reaches a first end surface (24) defined around a center shaft (14). The spark plug also has at least one outer electrode (22) up to the second end surface, the at least one outer electrode (22) partially surrounding the central electrode (30) at least laterally so that the second end surface is opposite to the second end surface. The central electrode (30) is radially offset to define a side gap (40) between the central electrode (30) and the at least one outer electrode (22). The spark plug (10) is characterized by forcing or redirecting the flow of a fresh air-fuel mixture through the side gap (40), helping to clear or remove residual exhaust gas left over from a previous combustion event out of the side 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 Patents(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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