Name: 为什么顶杆发动机转速红线低，但低速扭矩大？
Uploaded: 2023-06-22T11:01:22.000Z
Duration: 2 min 10 s
Description: 为什么顶杆发动机转速红线低，但低速扭矩大？

别的不说，压缩比高低你再看看

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对✔，顶杆机优点:活塞行程长，压缩比高，自然低扭强。皮实耐用维护简单，维修成本低。缺点:过高转速下，由于顶杆的惯性作用会导致气门弹簧回位不及时而导致功率严重下降，严重的会顶气门，所以顶杆机出厂会限制最高转速
链条机优点:转速更高所以极速更高，震动小，顶置凸轮轴可以设计4气门，而每个气门的开闭行程可以更短来进一步增加转速，适合公路行驶的摩托车。缺点:低扭差，压缩比低，同功率下比顶杆机费油，且维修稍贵

最主要还是飞轮的重量增加了扭矩力才强劲……

与设计有关，和柴油机原理一样

为什么顶杆发动机转速红线低，但低速扭矩大？

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