一种叫做“火环Ⅱ型”的新型汽车火花塞(图1)最初应用于1967年产的新别克400和430时~3排量的发动机上. 这种新火花塞的外形尺寸比普通平座式火花塞小些.图2所示是与14毫米的平座式火花塞的比较.六角从13/16时降到5/8时,并使用63°的锥形座,但保留了14毫米火花塞的末端的基 A new type of ignition plug called “Ring II” (Figure 1) was initially applied to the new Buick 400 and 430 horsepower to 3-displacement engines produced in 1967. The new spark plug has a much smaller form factor The spark plugs are smaller, as shown in Figure 2 compared to a 14mm flat-seat spark plug with the hex angle lowered from 13/16 to 5/8 and a 63 ° conical seat, leaving the end of the 14mm spark plug The base