平衡重定義

    pinghengzhongyongyujunhengquzhoulianganzhoujinghequbingchanshengdexiangxinliheliju，shiquzhouyunzhuanpingwenhejianshaozhuzhoujingzhouwajieshoudefuhe。faqijidequzhoushangzhuangzhiyoujunhengzhong
，zheshiweilejunhengliangandatou
、連杆軸頸和曲柄等產生的向心力及其力矩
，以使發起機平穩運轉
，減少主軸頸負荷。