Main fault precursor of diesel engine?

Let’s look at the main failure precursors of diesel generators and the precursors of watt combustion. Diesel engine starts, speed drops sharply, load increases, the engine takes black smoke, oil pressure drops, crankcase issued dry friction sound “goo”, is the precursor of burning shoes. If tooth, please stop immediately. Otherwise, the wear of the sleeve will be further aggravated, the adhesion of the journal surface will increase rapidly, the journal and the journal will be immediately locked, and the engine will lose speed. A precursor to a viscous cylinder. When the diesel engine is seriously short of water, pain usually occurs. The engine cannot run in front of the viscous cylinder, and the water temperature exceeds 100. A few drops of cool water fell on the engine body, let out a “whoosh”, white smoke, water droplets immediately evaporated. At this point, the engine runs at a low or idle speed, reducing the temperature of the vehicle. When the engine stops immediately, the piston and cylinder liner will stick together. Warning of valve drop cylinder. The valve falls on the cylinder usually because the valve is broken, the valve spring is broken, the valve spring seat is broken, the door lock clip is broken. The percussion sound of “dong” on the cylinder head (piston and valve collision), “friction” friction (piston and valve collision) and other abnormal sounds, in the case of engine instability, are mostly the precursor of valve, cylinder off. Piston, cylinder head, liner or bent connecting rod, engine cylinder block and crankshaft may be damaged. Stop engine immediately. Consolidate the front of the jar. Cylinder ramming is mainly because of destructive machine failure, loosening of connecting rod bolts, remove the valve fall off caused by cylinder ramming. Loosening or pulling the connecting rod bolt will increase the fit clearance of the connecting rod bearing. At this point, the crank case could be heard rattling, and the knocking had grown louder since childhood. After intoxicating, connecting rod bolts fall or completely break, connecting rod and bearing caps are discarded, and engine cylinder block and related components are damaged. A sign of a broken shaft. The fault symptom is not obvious when the engine crankshaft neck shoulder fatigue causes the recessive cracking. As the crack expanded and developed, the engine crankcase gave a dull knock. As the rotation speed changes, the knock sound increases and the engine produces black smoke. Soon, the noise of detonation gradually increased, the engine vibrated, the crankshaft cracked, the engine burned. Therefore, if the engine crankcase abnormal noise, immediately stop checking. The warning sign of a flywheel rupture. There were hidden cracks in the flywheel, which made a hoarse sound when knocked. When the engine starts, the flywheel knocks at the door. When the RPM changes, the noise increases and the engine wobbles. If the inspection is not stopped at this time, the flywheel could suddenly break and debris could fly off. A warning sign of overspeed. Before “overdrive,” diesel engines usually experience blue smoke, fuel or RPM instability. At first, the speed of the diesel engine was not controlled by the throttle, exceeding the rated speed, and the engine belched out a lot of black and blue smoke. At this point, if measures such as deoiling, asthma, and decompression are not taken quickly, serious accidents may occur, such as the sound of the engine speed continuing to rise, smoke filling the exhaust pipe, uncontrolled speed, and cylinder collapse.