我的摩托车一开快了就敲缸是怎么回事?

2024-11-30 23:04:53
推荐回答(3个)
回答1:

首先,纠正一下很多的人对敲缸的误解:以为就是活塞顶的太高,敲到汽缸盖了。其实不然,敲缸是活塞横向敲击汽缸壁,相当于频率很高的左右摆动。

为什么会敲缸?敲缸和压缩比和混合汽有关系。普遍现象是在发动机到了一定高的转速,这个时候突然回油(油汽供应突然下降),汽缸里会短暂发出难听的杂音。每一部摩托车改装过或没改装过的都会有敲缸现象,有的车不明显,所以就感觉不到了,例如原厂的车会把压缩比和混合汽比例设计的恰到好处,所以我们骑的时候是感觉不到的,但是它还是存在的!

改装车发出敲缸现象是比较常见的,有些不了解的车友就会以为是活塞环坏掉了,其实都没用多久!要改善敲缸现象,首先要调整好压缩比,压缩比不能太高,越高越容易敲缸。降低压缩比的办法,最简单方法就是增加上缸垫,最好用铜的那种!

另外原因就是高速混合比过稀。汽缸加大了,但是化油器供油量还是只能满足50cc的原装汽缸,喂不饱加大汽缸!所以这个时候就要增加高速时的油汽供应,就是加浓混合比,高速时的混合比不是靠调节怠速螺丝,那没用的。增加高速供油的办法是一,换大口径的化油器。二,加大油嘴,提高油针。检查的混合汽是不是合适,把车多开几圈,听听高速回油是不是有杂音,另外拆下火花塞看看,最好火嘴头上有点湿,这样的话对延长汽缸套件的寿命是很有帮助的。

敲缸其实是发动机爆震现象,造成活塞左右敲击!而并不是大家所认为的活塞顶到汽缸盖了,发生这个现象时汽缸燃烧温度会变很高,所以对汽缸的使用寿命也会缩短,所以建议大家改车时一定要调节好压缩比和高速油汽混合比!

回答2:

这个就要就车而论了!一般敲缸都是因为配气机构配合不好或者发动机大件(曲轴)损坏引起的!另外一种就是动力无法达到载重需求!(在负重爬坡的时候)

回答3:

是不是发动机不干净该清理了啊··

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