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Development of New Iridium Alloy for Spark Plug Electrodes
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 01, 1999 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
From the view of suppressing the global warming and environmental pollution, responding to the regulation of fuel consumption and exhaust gases along with lengthening the maintenance interval, are becoming more demanded. The development of a high-performance, long life spark plug has become essential in response to these demands. While improve performance (high ignitability and low required voltage), the discharge part of the spark plug needs to be reduced in size. But, in the past this has been difficult because of the limitations of platinum alloys in terms of wear. It has been difficult to achieve both smaller discharge parts and longer life.
To dramatically improve wear resistance, we researched materials that are both resistant to oxidation and have a high melting point. This research resulted in our development of a new iridium alloy.
Through this development we have been able to produce an iridium spark plug that surpasses the conventional platinum technology. The new iridium spark plug is now being used in high volume vehicle production.
This paper is divided into the following three parts and describes the development of the new generation of iridium spark plugs.
- Chapter 1IntroductionThe need for smaller electrode diameter and longer life spark plugs and related issues
- Chapter 2Development of Electrode MaterialsHistory of the development of the new iridium alloy
- Chapter 3Application in Spark Plugs
- 1High-performance and maintenance free spark plugs
- 2Super high-performance spark plugs
|Technical Paper||Super Ignition Spark Plug with Fine Center & Ground Electrodes|
|Technical Paper||Development of New Concept Iridium Plug|
|Technical Paper||Design and Materials for Long-Life Spark Plugs|
CitationOsamura, H. and Abe, N., "Development of New Iridium Alloy for Spark Plug Electrodes," SAE Technical Paper 1999-01-0796, 1999, https://doi.org/10.4271/1999-01-0796.
Data Sets - Support Documents
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- Ohshima T. et al. A Consideration about Electrode Shape of Spark Plug (PART2) JSAE No912263 1991
- Daisho Y. How should engines for automobiles be in the year 2010 and beyond? JSAE SYMPOSIUM 9834510 1998
- Nishio K. et al. A Study about Improvement of Spark Erosion Resistance on Thin Electrode Type Spark Plug Journal of Society of Automotive Engineers of Japan 24 4 1993
- Gray Eoin.W. et al. Electrode erosion by particle ejection in low-current arcs Journal of Applied Physics 45 2 1974
- Darling A.S. Some Properties and Applications of the Platinum-Group Metals The Institute of Metals. Review 175 1973
- Kawamura H. et al. Development TOYOTA New 1GZ-FE Engine TOYOTA Technical Review 207 1997