点火系统>>第3节点火系统零部件的构造与检修 闭磁路点火线圈 1: 10 ratio 10 turns 100 turns Primary Secondary 100 volts 1000 volts 20 amps 2 amps (2000Wats) (2000 watts) Step-up Figure 38. 4 A step-up transformer has fewer windings in its primary winding. Courtesy of Ford Motor Company闭磁路点火线圈 点火系统>> 第3节 点火系统零部件的构造与检修