Diesel engine failure(2)<\/p>\n
3 diesel engine vibration and temperature
\n\u00a0\u00a0\u00a0 Diesel engines and diesel vehicles to work, there is a regular feel normal vibration, low speed low load vibration small, high-speed high-load vibration to increase and accelerate the process of a gradual transition of the vibration process. In the use of significant changes in the vibration and significantly increased, indicating the engine failure. Engine bearing damage, diesel engine and the frame supporting the connection device damaged the engine vibration was changed; diesel engine of a cylinder is not working or working poor, so that the engine vibration to increase, when excluding the former causes the engine to check after itself.
\n\u00a0\u00a0\u00a0 Fluctuations in diesel engine oil pressure tubing, can be directly perceived law out of touch, touch the Chinese people feel the vibration like a pulse, as the volatility of high-pressure pipe with speed proportional to the rhythm accurately, the same amplitude. When the hands touch the pulse of a high-pressure cylinder tubing has become particularly important, it may be the cylinder injection injector needle stuck in the closed position due to further examine the work of the cylinder; when a cylinder high-pressure pipeline become particularly slippery when the light pulse may be at the cylinder valve oil seals bad, should continue to check.
\n\u00a0\u00a0\u00a0 Diesel engine after starting work, check the engine work, you can touch the cylinder exhaust temperature rise. If a cylinder temperature rise was significantly lower than the other cylinder, the cylinder does not work or that there is a fire situation; diesel engine in the idle speed instability, can also be used the touch method of checking each cylinder exhaust manifold temperature are the same as found in the cylinder temperature is still significantly lower, it should work for further examination of this cylinder. But when the engine temperature, engine temperature line ministries, touch temperature would not work.
\n\u00a0\u00a0\u00a0 4 instrumented
\n\u00a0\u00a0\u00a0 Dashboard of a car equipped with many instruments and the indication signal, such voltmeter, engine tachometer, water temperature, oil pressure gauge, pressure gauge, fuel gauge, speedometer and warning lights. These instruments not only for the user to grasp the work of the engine and cars, but also used the engine fault diagnosis, it is more convenient and simple. When starting the engine, if they feel difficult to start, the user should first note that the voice of the starter speed is too low, the observed voltage table indicates whether the low voltage and low voltage lights are already lit, you can determine whether an electric or battery What other problems. When the car stop and the engine idling, as noted barometer indicates pressure drop and pressure warning lamp is lit, or even pay attention to hear the voice of gas pipeline for leakage, it should be carefully observed barometric pressure pipe joints are not sealed strict or pipeline break phenomena.
\n\u00a0\u00a0\u00a0 5 Check the crankcase ventilation
\n\u00a0\u00a0\u00a0 Crankcase and combustion chamber in the smoke-related, mainly separated by the piston and piston rings, crankcase ventilation to view color and smoke cigarettes, you can more easily check the piston and piston rings seal the situation. Check the crankcase ventilation tube when then unplug the air filter connector, the engine is running out exhaust ventilation ducts seen in the case, but also slightly increased the speed of the engine exhaust smoke color and the observed changes in the amount of smoke. For the relatively new and the engine is working properly, there should be smoke out exhaust; for a long time but no fault with the engine, you can discharge a small amount of smoke, smoke color should be colorless or white; If the vent pipe the amount of heavy smoke, the amount of smoke more than the black color, indicating a serious leak piston ring wear; if smoke color is blue, the engine burning oil, combined with the amount of engine oil consumption, engine wear and tear can explain to what extent; if the color to black smoke and a lot of smoke, they should take into account the piston ring is stuck or has been broken, should be further examination to confirm the damage; in certain special circumstances, may become yellow smoke smoke, the engine may be burning bush, you should stop further inspection or repair. When the above is not enough to determine the apparent failure, the crankcase ventilation can also be connected to another root of the engine intake manifold of the exhaust pipe joints are pulled down and blocked, cutting off the crankcase exhaust gases directly through the piston chamber and piston rings and rows of people crankcase crankcase ventilation tube from the exhaust without the bypass, will significantly increase the amount of smoke was observed more intuitive.
\n\u00a0\u00a0\u00a0 6 smell smell
\n\u00a0\u00a0\u00a0 Diesel and gasoline smell different, always smell diesel engine, the smell from the engine exhaust pipe major, always incomplete combustion of diesel smell, even the driver who always stick a diesel smell, a smell that people have diesel smell of people, look at what the appearance, you can judge this man diesel truck driver. Can be seen with diesel exhaust smell is not surprising, but should pay attention to smell the exhaust of diesel increased to increase the flavor, which is due to diesel engine combustion is very full, check or adjust the diesel engine governor. If you compare carefully, you can accurately determine the diesel engine burning oil smell, etc., and then carefully observed and excluded.
\n\u00a0\u00a0\u00a0 7 split injection pump
\n\u00a0\u00a0\u00a0 Diesel fuel supply pump is an important component in the system, can partially open the pump method to determine the engine failure is a convenient and effective.
\n\u00a0\u00a0\u00a0 When the black smoke and diesel engine exhaust of a diesel engine cylinder fuel injection doubt too thick, you can remove the cylinder high-pressure pipeline, which stopped the oil tank in the engine speed and sound are changed at the same time, diesel exhaust black smoke is gone, you can immediately determine the cylinder due to the injection too thick.
\n\u00a0\u00a0\u00a0 When the diesel engine has a piston or piston pin percussion sound, and suspected that the sound from a single cylinder, can also remove the cylinder high-pressure pipeline, if the percussion disappears, the fault in the cylinder; if the judge does not, also the adjacent cylinder or other cylinder inspection, can generally find fault lies.
\n\u00a0\u00a0\u00a0 Check the engine speed limiter and torque calibration device is in accordance with requirements of work, you can open the fuel pump side cover, slowly raise the engine speed, while listening to the voice of the engine, fuel pump while observing the movement of the rack, If the engine up to rated speed when the rack moves to the back, engine speed will not continue to rise, is the speed limiter and torque limiter function. Otherwise it should be further checked and adjusted.
\n\u00a0\u00a0\u00a0 Diesel oil pipeline working poor suspect a leak failure, in the low-pressure high-pressure pump tubing into the pipe joints apart to observe whether there are air bubbles into the pipeline there and so on.
\n\u00a0\u00a0\u00a0 8 function test oil
\n\u00a0\u00a0\u00a0 Mainly by the normal operation of diesel engine oil to achieve normal. When the low-pressure oil pipeline open, they can be changed manually pump to pump the oil, look for low-pressure oil supply line part of the fault.
\n\u00a0\u00a0\u00a0 When the push-pull feel resistance hour hand pump, hand pump diaphragm may be bad, leak, resulting in poor engine.
\nWhen you feel resistance pull hands-pump stroke hand pump that drives a large resistance hour, even if one let go travel in the back, the handle will naturally fall, may be caused by blocked oil pipeline front-end pipeline, focus on examination of the preceding oil pipeline. When the trip was to promote the resistance of large hand pump and pull resistance-hour hands-pump may be clogged oil pipeline after the pipeline segment.
\n\u00a0\u00a0\u00a0 In the diesel engine shutdown, the cylinder can be removed by high-pressure pipe fittings, thugs force of high pressure oil pump, oil pump, high pressure pipe fittings oil observe the situation, under normal circumstances there should be no diesel spill; if a diesel spill, indicating that the cylinder out of bad valve seals, maintenance management should be removed.
\n\u00a0\u00a0\u00a0 When the suspicion that a bad cylinder injector fuel injection, the injector can be removed to this cylinder, the engine running, check the injector fuel injection conditions; also be at a standstill, leveraging the cylinder with the fuel pump column plug spring seat injector fuel injection method to observe the injection, determine good or bad injector.<\/p>","protected":false},"excerpt":{"rendered":"
Diesel engine failure(2) 3 diesel engine vibration and temperature \u00a0\u00a0\u00a0 Diesel engines and diesel vehicles to work, there is a regular feel normal vibration, low speed low load vibration small, high-speed high-load vibration to increase and accelerate the process of a gradual transition of the vibration process. In the use of significant changes in the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2365","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"yoast_head":"\n