Spark plug for removing residual exhaust gas and associated combustion chamber

Patent metadata

Field	Value
Publication number	US-9225151-B2
Application number	US-201213708690-A
Country	US
Kind code	B2
Filing date	Dec 7, 2012
Priority date	Feb 9, 2012
Publication date	Dec 29, 2015
Grant date	Dec 29, 2015

Abstract

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

First claim

What is claimed is:

1. A spark plug for an internal combustion engine, comprising:
a central electrode terminating at a first distal end surface defined about a central axis, the first distal end surface tapering inwardly from a point on the central axis;
at least one outer electrode terminating at a second distal end surface, the at least one outer electrode at least partially laterally surrounding the central electrode such that the second distal end surface is radially offset…

Assignees

• Cummins Ip Inc
• Cummins Ip Inc

Inventors

• Douglas Keith J
• Qin Xiao
• O'Connor Daniel J
• Sasidharan Premjee

Classifications

• H01T13/467

  Electricity · mapped topic

• H01T13/32

  Electricity · mapped topic

• Y02T10/125

  Cross-Sectional Technologies · mapped topic

• H01T13/46 Primary

  Electricity · mapped topic

• F02B19/12 Primary

  Mechanical Engineering · mapped topic