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Method of Checking for the Cylinder of Diesel Generator

Update:2018-05-25 15:40       source:未知       Click:

The following methods for each cylinder checking when the engine working:
(1) Listenning: with a stethoscope or with a stick, close to the body of the syringe, listen to the sound of the outbreak of the cylinder, the normal metal percussion sound similar to "Dangdang" sound. If only "good", not only is the sound of a row, and then little or no oil tank of the fire time, such as big gongs and drums show that the cylinder injection is too large or too early.
(2) color legal concept: when the engine works properly, from light gray emissions, the load bigger, the color a bit deeper. If black gas, indicating that combustition is not completely burned. If come out blue flame,it means that the oil into the cylinder burning. White smoke line, there is water inside of fuel, burning combustible gas, is also white smoke line. Continuous discharge of exhaust emissions of unusual colors, indicating that the individual cylinder is not working properly.
(3) Temperature method: the first start of the engine,(After working for a period of time the exhaust pipe temperature is very high, hand touch will burn) hand touch the cylinder exhaust pipe temperature, can identify the cylinder work conditions.If the cylinder exhaust pipe temperature is higher than other cylinders, indicating that the cylinder fuel supply is high; if the temperature is low, the cylinder fuel supply less, or not spray, or not completely burned after burning.
(4) Pulse method:Use hand pinch high-pressure tubing, feel the pulse when working, pulsation is small, the sound of weak, low temperature cylinder fuel supply is too small. The outbreak of the sound is not normal and the temperature is high for the injector oil pressure drop, fuel spray bad, or can not fire in time and completely burn. Pulsating large, explosive sound strong, high temperature cylinder for the fuel supply is too large. Burst sound weak and low temperature for the injector hole or needle valve stuck.
(5) Off the oil method: In order to accurately determine which cylinder is faulty, can cut off the high-pressure tubing to the fuel injector circuit, that is to stop working to observe the diesel generator work changes. When the cut off a cylinder oil, if the diesel generator speed and sound did not change or change little, indicating that the cylinder is working properly. Such as intermittent knocking cylinder, black smoke, when the cut off a cylinder of oil, the fault disappears, then the fault in the cylinder.
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