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Spark plug

一种火花塞、电阻值的技术，应用在火花塞领域，能够解决火花塞跳火性能下降、点火能量减少等问题，达到电波杂音的水平减少、抑制跳火性能下降的效果

Active Publication Date: 2013-08-21
NGK SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the resistance value of the resistor body is increased in order to reduce the level of radio noise, the ignition energy decreases and the sparkover performance of the spark plug may decrease

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0032] figure 1 It is a partial cross-sectional view of a spark plug 100 as an embodiment of the present invention. in figure 1 Here, the right side of the axis O-O indicated by the dashed-dotted line represents a front view of the appearance, and the left side of the axis O-O represents a cross-sectional view obtained by cutting the spark plug 100 with a cross section passing through the central axis of the spark plug 100. Below, will figure 1 The lower side of the spark plug 100 in the axial direction OD is the tip side of the spark plug 100, and figure 1 The upper side in the axial direction OD of the spark plug 100 in FIG. 1 is described as the rear end side.

[0033] The spark plug 100 includes an insulator 10 as an insulator, a metal shell 50, a center electrode 20, a ground electrode 30, and a terminal fitting 40. The metallic shell 50 has an insertion hole 501 penetrating in the axial direction OD. The insulator 10 is inserted into the insertion hole 501 and held. The c...

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PUM

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Abstract

The lowering of a flying-spark performance is suppressed, and the level of radio noise generated from a spark plug is reduced. A spark plug comprises: an insulator having a shaft hole formed in the axial direction; a center electrode provided at one end of the shaft hole; a terminal bracket provided at the other end of the shaft hole; and a connection part that electrically connects the center electrode and the terminal bracket within the shaft hole. The connection part of the spark plug includes a resistor, and the center electrode side resistance value, which is the resistance value on the center electrode side of the center of the resistor in the axial direction, is greater than the terminal bracket side resistance value, which is the resistance value on the terminal bracket side from the center of the resistor.

Description

Technical field [0001] The present invention relates to a spark plug, and particularly to a spark plug provided with a resistor. Background technique [0002] In recent years, with the increase in output of internal combustion engines, the voltage applied to spark plugs has increased. Therefore, the level of radio noise (ignition noise) generated by spark discharge also tends to increase. In the past, various techniques have been proposed to reduce such radio wave noise (for example, refer to Patent Documents 1 to 3). [0003] Generally, by increasing the resistance value of the resistor arranged at the connection portion that electrically connects the center electrode of the spark plug and the terminal fitting, the level of radio noise can be reduced. However, when the resistance value of the resistor is increased in order to reduce the level of radio noise, the ignition energy is reduced, and the sparkover performance of the spark plug may decrease. [0004] Prior technical lite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01T13/20
CPCH01T13/41H01T13/20H01T13/40
Inventor 福岛宝寿水野贵光柴田勉本田稔贵
Owner NGK SPARK PLUG CO LTD
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