新型柴油机转速失控保护系统

分析柴油机发生转速失控的原因，介绍一种新型柴油机转速失控保护系统。该系统由转速检测电路、核心控制器及执行机构等部分组成。转速信号由安装在柴油机凸轮轴上的转速传感器测出并传送到核心控制器，当柴油机转速超出正常范围，核心控制器发出保护命令驱动执行机构，切断柴油机燃烧所需的氧气和燃油的供给，使柴油机减速直至最后停机。实际装车试验表明，新型柴油机转速失控保护系统可迅速、准确地在设定的报警转速发出报警信号，在设定的极限转速关闭空气阀和电磁阀，使柴油机停车，没有发生误判等异常情况，工作可靠性好。

A New Type of Protection System for Engine Runaway

Causes of engine runaway are analyzed and a new type of protection system for engine runaway is presented in the article. The system consists of speed testing circuit, kernel controller as well as actuators etc. The speed signal is detected by the sensor installed on engine cam shaft and transmitted to the kernel controller. When the engine speed is beyond normal range, kernel controller will send out a protection command to excite actuator to cut off oxygen and fuel supply for the engine combustion and dec...