During the trial run and use of the diesel engine, some unexpected accidents often occur. Failure to take timely measures can easily cause mechanical or personal accidents and must be taken seriously. 1. When the diesel engine reverses the diesel engine start, if the oil supply time is too early, the airframe is overheated, the starting speed is not enough, or the throttle is throttled when the engine is turned off; At this time, the rules of gas distribution and oil supply are destroyed, diesel combustion is not complete, a large amount of soot is generated, and it is easy to block or burn out the air filter cartridge; more serious is that the oil pump is reversed and not only cannot be supplied to the main oil gallery. Oil, instead, sucks the oil in the main oil gallery back into the oil pan, causing the friction pair of the bearing bush to burn out due to lack of oil. Therefore, once the diesel engine is found to be reversing (whose signs are boring sounds and black smoke is coming from the air filter), the accelerator should be immediately shut down, and decompression should be turned on if necessary to allow the engine to turn off as quickly as possible. At this time, it is not allowed to block the air filter by the cloth, so that the diesel engine can not be extinguished as soon as possible, and it is easy to ignite the cloth. Second, the start handle can not open when the starting claw ramp, start handle concave burr wear or burr, and reverse and other reasons, sometimes the diesel engine is started, but the starter handle is still stuck or stay in the starting shaft hole. If it is not stopped in time, the high-speed rotating starter handle may fly out at any time, posing a threat to the surrounding machinery and personal safety. Therefore, in the first 1-2 seconds after the start of the diesel engine, if the start-up lever is found to be stuck and the speed of the diesel engine is very low, you can try to knock down the start lever; if the speed of the diesel engine increases, you should immediately avoid the plane of rotation of the start lever. Evacuate the surrounding personnel and try to shut the throttle, or open the decompression, or loosen the high pressure pipe nut on the injector end to allow the diesel engine to turn off as quickly as possible. You must not use your hand or kick the starter handle. This is dangerous. Third, the speed of the coaster diesel engine after the start or operation suddenly increased, and more and more high; body flutter; exhaust pipe take a lot of smoke or blue smoke, diffuse smoke soon; four weeks ago, diesel engine screams, whistling This is the diesel coaster. At this time, measures shall be taken immediately to stop the diesel engine, such as closing the throttle, releasing the high-pressure fuel pipe nut; tying the air filter with the cloth (note that no decompression is required at this time); increasing the load on the diesel engine, etc. Pressure handle decompression (due to decompression can easily cause damage to the valve train components, generally not used). Regardless of the method used to stop the diesel engine, people should avoid the side of the flywheel and the side of the back cover of the horizontal diesel engine to prevent the flywheel from cracking and flying out of the human body when the cylinder is blown. 4. Sudden knocking sounds This indicates that the diesel engine is suddenly loose. If the valve lock clip falls off, the connecting rod bolts, the main bearing bolts loosen, etc., the machine must be shut down immediately, and the fault can be restarted only after it is removed, so as to avoid serious accidents such as ramming. V. Suddenly black smoke, increasing load This is most likely a precursor to burning tiles and sticking cylinders, and must be shut down immediately. After turning off, slowly crank the crankshaft several times to help dissipate heat so that the shaft and stick cylinder can be avoided. Six, abruptly turn off If the speed slowly decreases before the flameout, mostly oil circuit failure; If the sudden drop in speed before the flameout, and accompanied by black smoke phenomenon, it is mostly mechanical failure, this time should carefully find the cause, troubleshooting. Must not blindly try to start, so as to avoid the expansion of the fault.
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