本文章最後由 yongx13 於 2014-5-28 01:01 編輯
http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqcode.asp?mode=nml
突出型火花塞最初是爲頂置氣門式發動機配套設計的,它的絕緣體裙部突出殼體螺紋端面伸入燃燒室内。在燃燒的混合氣中吸收較多熱量,怠速時有較高的工作溫度,避免污損;高速時由於氣門頂置,吸入的氣流對准絕緣體裙部,將其冷卻,使最高溫度提高不多,因而熱範圍較大。
http://www.zwbk.org/MyLemmaShow.aspx?zh=zh-tw&lid=312253
Projected - centre electrode and it's insulator protrude from the threaded shell to some extent (usually around 1.5mm). This means the tip is more exposed to the combustion process and tends to keep cleaner, it also means that the spark is produced in a position closer to the centre of the combustion chamber - where the greatest efficiency can usually be achieved.
投射 - 中心電極,它的絕緣體從螺紋殼突出到一定程度(通常大約1.5毫米)。這意味著尖端更暴露於燃燒過程,並趨向於保持清潔,這也意味著火花是產生於一個位置更靠近燃燒室的中心 - 在那裡通常可以達到最大的效率。
http://www.sparkplugs.co.uk/pages/technical/glossary.htm
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