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目前,内燃叉车自动预热系统常采用延迟型自动控制电路,即启动开关打到ON挡位时,预热电路自动开始工作,在延迟一段时间后,电路自动停止预热。1.原电路缺陷内燃叉车自动预热延迟型控制电路原理如图1所示,其主要由蓄电池、启动开关、预热定时器、预热继电器、预热指示灯以及发动机上的预热塞等组成。当启动开关打到ON挡位时,预热定时器得电工作,其6号端脚输出接地的低电平信号,预热指示灯点亮。预热指示灯点亮的同时,预热继电器
At present, the internal combustion forklifts automatic preheating system often uses delayed automatic control circuit, that is, when the start switch hit the ON gear, the preheating circuit automatically starts working, after a delay for a period of time, the circuit will automatically stop preheating. 1. The original circuit defect Internal combustion forklifts automatic preheating delay type control circuit principle shown in Figure 1, which is mainly by the battery, start the switch, preheat timer, preheat relay, preheat indicator and engine glow plugs composition. When the start switch hit the ON gear, the warm-up timer is energized, the 6-pin output grounded low signal, the warm-up indicator light. Preheat the lamp while warming up, warm up the relay