The self-extinguishing of a single-cylinder diesel engine at work is a common fault. The cause of the fault can be roughly determined based on the signs at the time of self-extinguishment, which can be eliminated in a targeted manner. 1. When the flame is turned off by itself, the rotation speed suddenly drops and the exhaust pipe seriously emits black smoke. Such failure or lack of water for the cooling system, so that the machine temperature is too high, resulting in piston and cylinder liner due to local overheating scratches; or for the lubrication system is faulty, so that the machine temperature rises, resulting in burning tile holding shaft. 2. When the flame is turned off by itself, the speed drops abruptly, accompanied by an abrupt noise. This situation is mostly caused by the failure of the crankshaft or the piston, the breakage of the connecting rod bolt, the detachment of the connecting rod nut, the dropping of the valve lock clip, or the valve falling into the cylinder. 3. When the flame is turned off by itself, the rotation speed gradually decreases, but the sound of the engine and the color of the exhaust gas are not abnormal. This situation is mostly caused by the failure of the fuel system, such as the oil tank is not oil, the fuel tank switch is not open, the diesel fine filter core is blocked, the oil circuit enters a lot of air, the fuel contains water, or the air vent on the fuel tank cover is blocked. 4. When the flame is turned off by itself, the rotation speed gradually decreases and the exhaust pipe emits black smoke. This situation is mostly caused by problems with the intake and exhaust systems. It may be that the air filter or the intake and exhaust pipes are clogged. In addition, overload operation will also cause this situation. Author unit: Yishui County Vocational Education Center, Shandong Province
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