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汽油发动机传统点火系的点火开关和电流表是串接在点火线路中的。正常情况下，当接通点火开关至1档时，电流表指示为5～7 A(断电器触点处于闭合状态)。使用起动机时，电流表、点火开关及电阻线被起动机“+”接柱至点火线圈“+”接柱间的导线短接，电流表只指示为2～3 A(励磁电
Ignition switch and ammeter of gasoline engine traditional ignition system is connected in series with the ignition circuit. Normally, when the ignition switch is turned on to the 1st gear, the ammeter indicates 5 ~ 7 A (the breaker contact is closed). When using the starter, the ammeter, ignition switch and resistance wire are shorted by the wires between the “+” connecting rod of the starter and the “+” connecting rod of the ignition coil, the ammeter only indicates 2 ~ 3 A