Development of Small Spark Plug (M8 × 1)

891760

09/01/1989

Event
Small Engine Technology Conference & Exposition
Authors Abstract
Content
The latest engine development trends have blended the consumers demands for high performance and horsepower output with Governmental regulations for fuel efficiency and emission reductions. As a result of this, it has become increasingly common to use a four valve per cylinder design. One application in particular is a four-stroke cycle engine for motorcycles. In order to incorporate all of these elements into one design, space constraints being considered, spark plugs of a reduced size were developed. To this end, compact spark plugs attain the following advantages over the conventionally sized plugs:
  1. 1)
    Improved volumetric efficiency due to an increase in valve diameters and a reduction in valve arrangement angles.
  2. 2)
    Improved rigidity of the material in the area between the threaded plug hole and the valve seat.
Meta TagsDetails
DOI
https://doi.org/10.4271/891760
Pages
10
Citation
Kagawa, J., and Kato, H., "Development of Small Spark Plug (M8 × 1)," SAE Technical Paper 891760, 1989, https://doi.org/10.4271/891760.
Additional Details
Publisher
Published
Sep 1, 1989
Product Code
891760
Content Type
Technical Paper
Language
English