Piston Height - Inspect
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所需工具     | |||
---|---|---|---|
工具     | 零件号     | 零件描述     | 数量     |
A     | 1P-2403     | 千分表     | 1     |
B     | 1P-2402     | 仪表体     | 1     |
如果缸体中的活塞高度不符合规格, "活塞和活塞环"中规定的公差,则必须要检查活塞销轴承。 请参考系统操作、测试和调整, "连杆 - 检查"。 如果更换或重新机加工过以下任一部件,则必须测量活塞高于缸体的高度:
- 曲轴
- 缸盖
- 连杆
- 活塞销轴承
必须保持适当的活塞高度才能确保发动机符合排放标准的要求。
注: 活塞顶部不应进行机加工。 如果安装的是原来的活塞,确保将原来的活塞组装到正确的连杆上并安装到原来的气缸中。
连杆的六个长度等级确定缸体中活塞的高度。 通过字母或颜色即可识别出连杆的长度等级。 这个字母或颜色标记在连杆侧面上。 有关更多资料,请参阅技术规格, "连杆"。
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图 1 | g01335979 |
(A) 千分表 (B) 仪表体 |
- 使用工具 ( A ) 和 (B ) 测量高于缸体的活塞高度。 使用缸体表面作为千分表的零位。
- 转动曲轴,直到活塞处于上止点附近。
- 将工具 (A ) 和 ( B ) 放在朝向发动机后部的位置 ( 1) ,以测量缸体中活塞的高度。 缓慢地转动曲轴,确定活塞处在最高位置的时刻。 记录该尺寸。
- 将工具 (A ) 和 ( B ) 放在朝向发动机前部的位置 ( 2) ,以测量缸体中活塞的高度。 记录位置 (1 ) 和 ( 2 ) 读数的平均值。 将该尺寸与技术规格, "活塞和活塞环"中给出的尺寸进行比较。
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