4D95S With Turbine Diesel Engine Cylinder Head 6204-13-1211

Wear CausesEdit Broadcast1. The reasons for the early wear of the cylinder(1) The new or overhauled engine is put into operation without strict running-in test operation, resulting in early wear of cylinders and other parts.(2) Long-term overload operation. Due to the long-term overload of the engine, the temperature rises, the lubricating oil becomes thinner, and the lubrication is poor, which accelerates the wear of cylinder liners, pistons and piston rings and other parts. And due to the rise of oil, the inflation coefficient decreases, the ratio of fuel to air is out of balance, the combustion is incomplete, and the carbon deposits of cylinders and other parts increase, causing cylinder failure, thereby accelerating the early wear of the cylinder.(3) Long-term idle operation. When the engine is idle for a long time, the engine temperature is too low, the lubrication is poor, the combustion is incomplete, and there are many carbon deposits, which accelerates the early wear of the cylinder. And due to the low temperature of the machine, acidic substances are easy to produce in the cylinder, thereby corroding the cylinder, causing pockmarks to peel off, causing early wear of the cylinder.(4) Frequent starting. After the engine is turned off, the oil in the lubricating oil circuit quickly flows back to the oil pan, so frequent starting will make the surface of parts such as cylinder liners, pistons and piston rings in a state of dry friction or semi-dry friction, which will inevitably accelerate the wear of the cylinder liner.(5) Do not pay attention to the maintenance of the air filter, resulting in serious blockage of the air filter element, and the air without the filter directly enters the cylinder. The various dust impurities contained in the air, of which silica accounts for more than half, its hardness exceeds that of steel, so the air entering the cylinder accelerates the wear of the cylinder.(6) Change the oil from time to time. After the oil is used for a certain period of time, it gradually ages and deteriorates, loses its lubrication effect, and mixes some mechanical impurities to cause abrasive wear.(7) Supply fuel during engine starting and warm-up. When the temperature of the multi-cylinder diesel engine is lower than 5 °C, it must be fully preheated before it can supply oil to the cylinder, but the oil supply during the preheating period is not only difficult to start, but also the fuel injected early, due to incomplete calcination, the cylinder carbon deposits increase, accelerating the wear of the cylinder.(8) After the engine is started, it is put into operation without preheating, because the engine temperature is too low, the throttle is immediately increased, the combustion is incomplete, the cylinder carbon deposits increase, and the cylinder wear is accelerated.(9) The engine is sick operation. Such as connecting rod bend, twist, loose or too tight mating parts, etc.(10) The selection of lubricating oil does not pay attention to the specifications.(11) "Boom throttle". Some operators hit the throttle a few times before shutting down, trying to burn the residual oil in the cylinder clean, in fact, it is counterproductive, because the throttle is suddenly large and small, the fuel and air are mixed unevenly, the combustion is incomplete, and the carbon deposits are produced, which accelerates the wear of the cylinder.2. Measures to prevent early wear of cylinders(1) The new or overhauled diesel engine must undergo strict running-in test operation before it can be officially put into operation.(2) Regularly check and maintain the air filter, oil filter, diesel filter, so that it is in a good technical condition to work, which is an important measure to prevent dust impurities from entering the cylinder from the air, fuel and oil passage, reduce cylinder wear and extend the service life of the engine.(3) Replace the oil pan oil regularly, and the added oil must meet the requirements of the manual. When replacing the oil pan oil, the oil pan should be carefully cleaned