Diesel Engines Maintenance Tips

The engine is a core constituent of the machine, particularly for a power generator, so the engine preservation and repair is necessary. Here to talk about the diesel engine preservation and repair skills.

Maintenance Tips

Diesel engine “speed” incidence and emergency measures

“Speed” or speeding is an occurrence peculiar to the engine. “Speed” when the engine speed out of control, and faster and faster, and even more than the allowable greatest speed and is accompanied by loud noises, most important to serious automatic injure scrapped. Cause “speed” There are two main reasons: First, immunization pump governor’s own fault, to adjust to the loss of the normal individuality; the other hand, changes in engine speed individuality, wherein the fuel injection pump governor itself there is no fault, the engine during process, an additional diesel fuel or engine oil into the combustion chamber. Happen “Speed” occurrence should take urgent measures to a certain extent the high engine speed when the malfunction. Stop speeding emergency measures are:

·         Accelerator pedal quickly retract the parking position.

·         The lessening gear device quickly pulled to stop the oil heaviness lever position (or reduced position).

·         Timely connected into high gear, depress the brake pedal; slowly lift the clutch, the engine flameout.

·         Quick separate pressure tubing, stop oil supply.

·         Package tight garments quickly with the air filter, the engine breathe flameout.

·         These five steps referred to “slow down, space, brake, breathe.”

The work of each cylinder diesel engine inspection methods

The work of each cylinder diesel engine idling can be checked using the following method:

o   Listening method: using a stethoscope or with metal rods, near the site of the injector body, listen to the voice of the outbreak of each cylinder, the normal sounds like metal drumming “Dangdang” sound. If only the “ho ho” unremitting not just the sound, then the cylinder oil little or no timely fire, such as percussion large, indicating that the injection cylinder oil is too big or too early.

o   Concept of color method: diesel engine is operational properly; the exhaust fumes color is light gray, somewhat darker when the load is heavy. Such as exhaust gas black, indicating incomplete combustion of combustible gases. Row of blue smoke that burning oil into the cylinder. Row of white smoke, then there is water in diesel engines, also ranked unburned combustible gas white smoke. Incessantly discharged weaken smoke color is not normal, indicating that human being cylinder is not working properly.

o   Temperature method: in the initial stage after engine start (working for some time back exhaust pipe temperature is high, touch will burn) touch each cylinder weaken temperature, can recognize each cylinder work. If each cylinder exhaust temperature than the other cylinder is high, indicating that the high levels of cylinder oil; if the temperature is low, the cylinder oil less, or no injection, or after injection did not completely burn or not burn.

o   Pulse method: high pressure pipe clenched hand, feeling the pulse of the situation when the injector, pulsation, broke the sound weak, and low temperature cylinder small amount of oil. Broke the sound is not normal and high temperature oil pressure drop for the Injector, injector atomization bad or not timely ignition and complete fire. Pulsation large outbreak voice strong, high temperature fuel supply tank is too large. Outbreak voice weak and low temperature for the injector holes or needle stuck.

o   Off oil Method: In order to precisely conclude which cylinder is faulty, can be cut off by the cylinder pressure tubing to the injector circuit; it stops working, in order to examine changes in diesel engine working environment. When cutting cylinder oil, if the engine speed and the sound does not change or changes little, commissioner that the cylinder is working appropriately. Such as intermittent knock, exhaust smoke, when a container cut off oil, the fault disappears, then the fault in the cylinder.