C1.7 and C2.2 Industrial Engines Caterpillar


Welding on Engines with Electronic Controls

Usage:

C1.7 G34
需要正确的焊接步骤来避免损坏下述部件:

  • 发动机电子控制模块 (ECM)

  • 清洁排放模块(CEM)

  • 传感器

  • 相关部件

也应考虑用于从动设备的部件。 如可能,拆下需要焊接的部件。 当在配备 ECM 的发动机上进行焊接而又不可能将部件拆下来时,必须遵循下述步骤。 本步骤可尽可能避免电子部件损坏。

  1. 停止发动机。 断开 ECM 的电源。

  2. 确保关断通往发动机的燃料供应。

  3. 从蓄电池上断开蓄电池负极电缆。 如果安装了蓄电池断路开关,应断开此开关。

  4. 从导线线束上断开所有电气部件。 包括下列部件:

    • 从动设备的电气部件

    • ECM

    • 传感器

    • 电动燃油泵

    • 电控阀

    • 继电器


    注意

    切勿将电气零部件(电子控制模块或电子控制模块传感器)或电子零部件的接地点用作电焊机的接地点。




    图 1g01075639
    使用上面示例。 从焊机到焊机接地夹的电流不会损坏任何相关部件。
    (1) 发动机
    (2) 焊条
    (3) 钥匙开关处于 OFF(断开)位置。
    (4) 蓄电池切断开关处于打开位置
    (5) 已断开的蓄电池电缆
    (6) 蓄电池
    (7) 电气/电子部件
    (8) 焊接的部件与任何电气/电子部件之间的最小距离
    (9) 要焊接的部件
    (10) 电焊机的电流通路
    (11) 电焊机接地卡箍

  5. 如可能,将焊接设备的接地卡箍直接连接到待焊接发动机部件上。 尽可能将夹子夹在焊接点附近。 就近定位可避免焊接电流损坏发动机轴承、电气部件和其他部件。

  6. 防止焊接碎屑和/或焊接飞溅物损坏导线线束。

  7. 采用标准焊接步骤将物料焊接在一起。

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