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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。
Analysis of the reasons for the uncontrolled speed of the diesel engine introduces a new type of diesel engine speed control system. The system consists of speed detection circuit, the core controller and implementing agencies and other components. The speed signal is detected by the speed sensor mounted on the camshaft of the diesel engine and transmitted to the core controller. When the speed of the diesel engine exceeds the normal range, the core controller issues a protection command to drive the actuator to cut off the supply of oxygen and fuel required for the combustion of the diesel engine, Decelerate the diesel engine until finally shut down. The actual loading test shows that the new diesel engine runaway protection system can quickly and accurately send an alarm signal at the set alarm speed and close the air valve and solenoid valve at the set limit speed to stop the diesel engine without any misjudgment or other abnormalities Situation, work reliability is good.