我部一辆东风EQ140型载货汽车,在行驶途中,发动机突然熄火,且再次起动时,无起动迹象,只好将车拖回部队修理。维修人员拆下分电器及化油器检查,均未发现异常情况。进一步检查,发现中央高压线无高压火花,可能是点火线圈的初级线圈断路所致。我们知道点火线圈主要由初级线圈、次级线圈及铁芯组成,接通点火开关点火档后,低压电流流经初级线圈,因此线圈四周便产生磁场,线圈中的铁芯起加强磁场的作用。磁力线穿过初级和次级两个线圈各匝,通过铁芯构成回路,分电器凸轮的转动,使白 I Dongfang EQ140 a truck type, in the middle of the journey, the engine suddenly flameout, and start again, no start-up signs, had to drag the car back to the unit repair. Maintenance personnel removed the distributor and carburetor inspection, found no abnormalities. Further inspection and found no high-voltage central high-voltage spark, the ignition coil may be caused by the primary coil open. We know that the ignition coil is mainly composed of a primary coil, a secondary coil and an iron core. When the ignition switch is turned on, a low-voltage current flows through the primary coil. Therefore, a magnetic field is generated around the coil, and the iron core in the coil acts as a magnetic field. Magnetic lines through the primary and secondary coil of each of the two turns, forming a loop through the core, the distributor cam rotation, so that white