Forced air cooling, Signal cylinder, 4-stroke.

单缸，四冲程，强制风冷发动机。

Single phase moving core, forced air cooling structure;

单相动铁芯式，强迫风冷结构；

Single phase moving core type and forced air cooling structure;

单相动铁芯式，强迫风冷结构；

The method to improve power source switch and control circuit of cooler in forced-oil and forced-air cooling transformer is presented.

介绍了强油风冷变压器的冷却器电源切换控制回路的改进方法。

Overhigh heat load of forced air cooling engine for motorcycle not only drops the inherent performance of the engine, but also leads to diversified troubles.

强制风冷式摩托车发动机热负荷过高，不但降低了发动机原有的性能，而且会导致产生多种故障。