C175-16 Marine Propulsion Engines Caterpillar


Engine Overspeed Verification Test

Usage:

C175-16 M6A
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。

执行超速验证前,使用 Caterpillar 电子技师 (ET) 确定发动机超速验证测试的停机转速。

在 Cat ET 中,选择 "Service(维修)"下拉菜单。 选择维修菜单中的 "Monitoring System(监控系统)"选项。 找到 "Monitoring System(监控系统)"屏幕上列出的 "Engine Overspeed(发动机超速)"参数。 超速警告参数的典型设置为额定发动机转速的 115%。 超速停机参数的典型设置为额定发动机转速的 118%。 参考图 1。




图 1g02630823

(1) "Monitoring System(监控系统)"下拉菜单

(2) 超速警告和停机的转速设置

当执行发动机超速验证测试时,测试将在 75% 的超速停机参数值下关闭发动机。 对于此应用,发动机将在 1062 rpm 时关闭。 当执行超速验证时,监控发动机转速。 确认发动机在达到 75% 的编程设定值时停机。

使用 Cat ET 的发动机超速验证步骤




图 2g01413666

(4) 双击 "Engine Overspeed Test(发动机超速测试)"

(5) 选择 "Override Parameters(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 3g01413667

(6) 选择 "ON(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,参数将自动回到默认的正常模式。 发动机将不在 75% 的编程设定值下停机。

起动发动机,并监控加速期间的发动机转速。 确认发动机在 1062 rpm 的发动机转速下停机。

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