3500B Locomotive Engines Caterpillar


Overspeed Verification Test

Usage:

3512B 3ZW
注: 执行该测试时,记录发动机超速情况。 该事件要求出厂密码,以便清除。

执行超速确认前,使用 Caterpillar 电子技师(ET)确定发动机超速的停机设定。 选择"维修"栏。 选择"监控系统",查看"发动机超速"以及"发动机停机"设定。 请参阅插图 1。 在本例中,编程设定是 2200 rpm。



图 1g01413664
(1) 选择"监控系统"。
(2) 检查 RPM 设定。

在本例中,编程设定 2200 rpm 的 75% 是 1650 rpm。 执行超速确认时,监测发动机转速以确认发动机在达到编程值的 75% 时停机。

使用接线箱执行该步骤。



图 2g01413665
(3) 超速开关

为了设置超速确认功能,拨动瞬时开关约 1 秒钟。 这将造成在编程超速设定的 75% 时发生超速停机。

注: 拨动开关的该功能可在 Cat ET 中进行配置,以起到超速确认开关或扭矩限制开关的作用。 工厂默认为超速确认开关。

加速时起动发动机并监测发动机转速,以确定发动机是否在编程设定的 75% 时停机。

使用 Cat ET 执行该步骤。



图 3g01413666
(4) 双击"发动机超速测试"
(5) 选择"超越参数"。

从"诊断"下拉菜单中,选择"诊断测试"。 然后选择"超越参数"。 接着选择"发动机超速测试"。



图 4g01413667
(6) 选择"接通"。

选择"接通"然后单击"确定"。 使屏幕保持超越参数激活状态。 如果离开超越参数屏幕,该参数将自动默认返回到正常模式,发动机将不会在编程设定的 75% 时停机。

加速时起动发动机并监测发动机转速,以确定发动机是否在编程设定的 75% 时停机。

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