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58问答库 > 四缸发动机当曲轴、凸轮轴记号对准时,如何判断1缸或4缸哪个处于压缩行程上止？

四缸发动机当曲轴、凸轮轴记号对准时,如何判断1缸或4缸哪个处于压缩行程上止？

2025-03-16 07:08:33

推荐回答（1个）

回答（1）：

看各车发动机上止点正bai时记号，记号相对时就du是各气门止点，看进、排zhi气门动作:当四缸发动机的第四dao缸的排气门行将关闭、进气门行将打开时。

看凸轮轴凸轮位置:一缸两凸轮顶部向下,其对称面与气缸体上平面垂直时。看曲轴连杆轴颈:一缸连杆轴颈处于最上端时。看第四、六气门开启情况:CA10B发动机缸盖打开后,第四、第六气门顶起到最高位置时。

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