This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Development of New Concept Iridium Plug
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 05, 2001 by SAE International in United States
Annotation ability available
Event: SAE 2001 World Congress
In the field of automotive gasoline engines, new products aiming at greater fuel economy and cleaner exhaust gases are under development with the aim of preventing environmental destruction. Severe ignition environments such as lean combustion, stronger charge motion, and large quantities of EGR require ever greater combustion stability. In an effort to meet these requirements, an iridium plug has been developed that achieves high ignitability and long service life through reduction of its diameter, using a highly wear-resistant iridium alloy as the center electrode.(1)(2)
Recently, direct injection engines have attracted attention. In stratified combustion, a feature of the direct injection engine, the introduction of rich air-fuel mixtures in the vicinity of the plug ignition region tends to cause carbon fouling. This necessitates plug carbon fouling resistance.
Success was achieved in developing a new concept iridium plug that dramatically improves carbon fouling resistance while preserving long service life and high ignitability found in conventional plugs. (Fig. 1)
This paper consists of the four chapters that follow describing the newly developed product.
- Chapter 1Introduction
- Chapter 2Overview of New Concept Spark Plug
- Chapter 3Development Progress
- Chapter 4Evaluation on Actual Engines
CitationHanashi, K., Ishino, Y., Osamura, H., and Hashizume, K., "Development of New Concept Iridium Plug," SAE Technical Paper 2001-01-1201, 2001, https://doi.org/10.4271/2001-01-1201.
- Osamura Hironori :Development of High Ignitability and Long life Ir Spark Plug JSAE No.9939532 (1999)
- Osamura H, Abe N :Development of New Iridium Alloy for Spark Plug Electrodes. SAE Technical paper 1999-01-0796 (1999)
- Koike Makoto et al. :New Concept DI Gasoline Engine JSAE No9939596 (1999)