SUPER IGNITION SPARK PLUG WITH WEAR RESISTIVE ELECTRODE

摘要

Ever since the creation of the spark plug, improvements have continually been made to achieve high ignitability and long life. To fulfil these requirements, "lridium Spark Plug" was introduced in 1997 with fine-wire center electrode technology to promote ignitability and long life. Then in 2003 "Super Ignition Spark Plug" was developed which uses fine-wire precious metal alloys on both the center and ground electrodes to achieve supreme ignitability and long life.Currently, the global technology trend is focusing more and more on the regulation of emissions and fuel consumption. This is driven by increased awareness for environmental conservation. These regulations arc becoming stricter, which leads to a higher demand for spark plug ignitability from all kinds of vehicles ranging from luxury cars through compact sized cars. Particularly in the small vehicle category, both ignitability and low cost arc a requirement. Currently the high ignitability spark plug docs not meet the second requirement since they contain precious metals like Platinum and lridium on their electrodes. These materials significantly affect material cost. On the other hand, a conventional electrode material like Nickel is not able to achieve high ignitability since its wear due to engine usage is much higher than precious metals when used in a fine-wire design.Considering these circumstances mentioned above, we have developed a superior wear resistive material to achieve a fine-wired electrode design without the use of precious metals. Based on this development, we have introduced a new Super Ignition Spark Plug that achieves both high ignitability and low cost. (Fig. 1 shows the orientation of developed spark plug).