Overspeed
发动机过热将引起发动机和被驱动部件的严重损害。 发动机超速保护是一项安全性能,采取必要的措施,以便在发动机出现超速事件时实施发动机关机。
该发动机机组的应用系统中可能配备有能进行发动机控制的电子模块式控制面板II(EMCP II)。 如果安装了该控制面板,EMCP II将执行对发动机的发动机监测和保护功能。 该控制面板使用独立的位于飞轮壳里的发动机速度传感器。
下列发动机保护用于发动机超速时:
停机 - 对于此项应用的唯一有效的"发动机监测"模式是关机模式。 当EMCP II被编程为关机时,发动机超速条件将启动发动机的"关机"。 在出现发动机超速情况期间,发电机控制装置将命令ECM停止向气缸喷射燃油。 发电机组可能装备有紧急空气关断装置。 如果空气关断是有效的,发电机控制装置将激活空气关断电磁线圈。 在发动机重新启动前,必须通过向EMCP II循环供电来重新设置空气关断电磁线圈。
以上操作模式在不同的发动机转速设定值都是有效的。
关于该控制面板的更多详细的资料,参见操作和保养手册, SEBU7050, "SR4B发电机和控制面板"。
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