Super Ignition Spark Plug with Fine Center & Ground Electrodes DENSO CORPORATION

Format:

Conference/Event

Author/Creator:

Hori, Tsunenobu, author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

Spark plugs with higher ignitability are continuously in great demand to realize high fuel efficiency and low emissions. To meet this demand, DENSO launched the Iridium Spark Plug in 1997, which realized the two characteristics that had been conventionally difficult to achieve concurrently-high ignitability and long life. The development of this product was enabled by miniaturizing the center electrode, produced using DENSO's original, highly wear-resistant iridium alloy (featuring a high melting point and excellent oxidation resistance).While spark plugs are now required to have a longer service life, they are also required to be higher in ignitability, as exhaust gas regulations have been tightened recently. However, the effort to miniaturize the center electrode is reaching a limit. While ignitability improvement is important, another critical point in the development of spark plugs is to reduce required voltage to accommodate a higher engine compression ratio, to keep up with future engine design trends. The most effective approach to reducing required voltage is to narrow the spark gap; however, a narrower spark gap might lower ignitability and it is difficult for conventional spark plugs to realize high ignitability and lowered required voltage.Under such restrictions, DENSO proceeded with research paying attention to the miniaturization of the ground electrode in addition to the conventionally worked-on center electrode, and has succeeded in developing a spark plug that features excellent ignitability, lowered required voltage and long life.This paper introduces the development of the new Super Ignition Spark Plug. It consists of three chapters:

Notes:

Vendor supplied data

Publisher Number:

2003-01-0404

Access Restriction:

Restricted for use by site license