G3512E and G3520E Generator Set Engines Caterpillar


Engine Speed/Timing Sensor

Usage:

G3520E FZJ
如果产生发动机转速/正时传感器诊断代码,请参阅故障诊断和排除手册。

为了正确工作,必须纠正故障状况和传感器的安装。 如果对故障状况或传感器的安装有怀疑,使用下列程序:



    图 1g00760464
    (1) 发动机速度/正时传感器

  1. 拆下发动机转速/正时传感器 (1)。 检验磁铁端的状况。 查找有无磨损和污染。

  2. 从磁铁面上清除所有碎屑。


    图 2g00909543
    (2) 滑动头

  3. 检查滑动头 (2) 的紧度。 轻轻地将滑动头最少伸出 4 mm (0.16 in)。 然后将滑动头推回。

    当滑动头达到正确张力时,从伸出位置将滑动头推回至少需要用 22 N (5 lb) 的力。


    注意

    当安装转速/正时传感器时,滑动头必须完全伸出,以使传感器与转速—正时轮保持正确间隙。 如果不能保持正确间隙,就不会从传感器中产生信号。

    决不能将传感器安装在转速/正时齿轮的轮齿之间。 否则,会损坏传感器。 在安装传感器前,确保在传感器的安装孔中可以看到轮齿。


  4. 安装发动机转速/正时传感器。

    1. 确保在传感器的安装孔中可以看到转速-正时轮的轮齿。

    2. 将滑动头 (2) 伸出最少 4 mm (0.16 in)

    3. 在传感器的螺纹上涂 4C-5598 高温防粘结剂。

      注: 滑动头的设计是与转速 - 正时轮轮齿接触。 在滑动头和轮齿之间的最大容许间隙为 0.5 mm (0.02 in)

    4. 安装传感器。 拧紧锁紧螺母至扭矩为 40 ± 5 N·m (30 ± 4 lb ft)

正时标定

仅在下列状况下,需要正时标定:

  • 更换过电子控制模块(ECM)。

  • 转速/正时传感器已更换。

  • 转速 - 正时轮和/或后齿轮系已被调整。

  • 转速 - 正时轮和/或后齿轮系已被更换。

Caterpillar 电子技师 (ET) 使用发动机转速/正时传感器,帮助标定发动机正时。 有关正时标定的说明,请参阅故障诊断和排除, "发动机转速/正时传感器 - 标定"。

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