spark plug
A technology of spark plugs and terminals, which is applied in the field of spark plugs and can solve the problems of precious metal terminal stripping and other problems
Active Publication Date: 2020-03-06
NGK SPARK PLUG CO LTD
View PDF9 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Usually, the noble metal tip and the ground electrode differ in thermal expansion rate, so when subjected to cold and heat cycles due to the use of spark plugs, the noble metal tip may peel off from the ground electrode
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Deformed example 1
[0081] As a spark plug, capable of having figure 1 Spark plugs of various structures other than those shown are applicable to the present invention. In particular, various modifications are possible regarding the specific shapes of the terminal fittings and insulators.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a spark plug, which improves the peeling resistance of the noble metal end. The spark plug includes a center electrode, a ground electrode, and a noble metal tip joined to the vicinity of one end of the ground electrode via a fusion zone. The fusion zone is formed so as to extend to the outer side of the outer shape of the noble metal tip so as to exist on the inside of both side ends of the ground electrode in the width direction of the ground electrode and at positions away from the side ends. Further, the melting portion has a melting protrusion protruding in a direction away from one end of the ground electrode in the vicinity of at least one of the two side ends of the noble metal tip in the width direction of the ground electrode.
Description
technical field [0001] The present invention relates to spark plugs. Background technique [0002] Generally, a spark plug has a center electrode and a ground electrode on its tip side. In addition, conventionally, a spark plug having a noble metal tip joined to the vicinity of one end of the ground electrode has been used in response to demands for improvement in ignitability and wear resistance of the spark plug. [0003] Generally, the noble metal tip and the ground electrode differ in thermal expansion rate, so when subjected to thermal and cold cycles due to the use of the spark plug, the noble metal tip may peel off from the ground electrode. Therefore, conventionally, in order to prevent peeling of the noble metal tip, various methods have been studied for its joining method (Patent Documents 1 and 2). [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese Patent Laid-Open No. 2005-123182 [0007] Patent Document 2: Japanese ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H01T13/20H01T13/32H01T21/02
CPCH01T13/20H01T13/32H01T21/02H01T13/08H01T13/39
Inventor 松下大辅井上正博
Owner NGK SPARK PLUG CO LTD