Six things shouldn’t do when start diesel engine

Six things shouldn’t do” when start diesel engine
First, start on the maximum position of the throttle. Equipped with full program for the governor of the diesel engine, start increasing the throttle to a position, pump the fuel supply has reached the maximum. Continue to increase even if the throttle, the fuel supply pump will no longer increase, and the governor spring preload has been increased, the engine speed increased rapidly after startup. But just start diesel engine is generally relatively low temperature, lubrication of the friction surface conditions are poor, so the engine is started to enter the high-speed operation, the movement is bound to increase vice of wear, and even lead to Burnt axle and other major faults. So, start the engine, the throttle should be positioned on the board 2 / 3 (this position is the maximum amount of oil at the pump), without having to throttle increase in the end, so as not to start after the engine speed is too high. If the poor technical condition of the engine can also be appropriate to enlarge the throttle and then some, but not more than positioning plate 4 / 5.
Second, start with warm-air fire. In winter, the engine start difficult, and some machines on hand to remove the air filter cover, light in the mouth into the trachea a mass of tarpaulin to increase air into the cylinder temperature. Although this approach helps the engine start, but it can also produce some harm. Main hazards are: ① open flame preheat air entering the cylinder of air without a filter (dry centrifugal filtration), or simply no filter (some machine hand in the cylinder head inlet at the ignition), so that the air contains impurities directly into the cylinder, increasing the cylinder liner, piston, piston rings and valves, valve seats and other parts of the wear and tear. Smoke and fire burning into the cylinder is easy to form coke. ② If the air filter every time you start all demolition,
Then easily lead to closure of the intake pipe lax, resulting in leakage, so that part of the unfiltered air enters the cylinder, which is extremely detrimental to the engine work. ③ fire started is not conducive to safety, especially some old locomotive, a serious oil leak, can easily cause a fire. Start at low temperatures, can be used to raise water cooling system, with a dark baking pan fire engine to warm up other methods of heating.
Third, start the engine slide slope. Starter out of the problem (lack of battery charging, starter or starting circuit malfunction, etc.), and some machines are not in a timely manner to repair hand, but take for motorcycle slip slope method, the driving wheel driven by the engine rotation, the diesel engine to start. Often does not know that the slope starts to slip, its disadvantages are many. Main hazards are: ① engine does not warm-up process, if a long time stop, the friction surface of the oil has been lost, the film suffered serious damage, a sudden high-speed diesel engine operation, oil is not timely sent to the friction surfaces, adding to mechanical wear and tear. ② slip slope starts, due to excessive clutch engagement, it is easy to make the clutch, transmission and other transmission parts by excessive impact load damage. ③diesel engine to be started after the emergency brake, brake and running gear will affect the service life of components, in particular to increase tire wear. Moreover, after starting a high speed, prone to accidents.
Fourth, tractor pull start. Drag starts, usually linked to low gear before the car, hanging high gear after the car (so the lower engine speed before moving), the use of the driving wheel and driven by the engine rotation drive mechanism, the engine starts. This method starts the harm is: ① As the start of the locomotive hauled linked to high gear, once started, is bound to suddenly pediment, easy collided with a car accident occurred. ② motorcycle oil viscosity due to the initiating resistance, especially in the cold season, often the driving wheel to slip, make a serious tire wear. In the startup process, they had to take several isolated and fierce way with the clutch, clutch parts led to serious damage or wear. ③ If the long pull, the engine does not start, then make a lot of diesel fuel into the cylinder, erosion and destruction of cloth on the cylinder wall oil film, increasing the cylinder liner, piston rings and piston wear. Meanwhile, diesel fuel into the crankcase oil dilution will reduce the lubrication system the lubrication quality.
Fifth, start the engine without cooling water. This boot method is particularly serious harm to the engine because the engine in the outbreak of the moment, the cylinder temperature up to 2000 °C, this temperature is not only reflected on the water table is not out of the cylinder block is also hand-feel. Thus be inferred that the engine starts on fire, the combustion chamber temperature of the wall immediately increased (about 500 °C -600 °C above). At this point the engine suddenly to cold water, the combustion chamber wall suddenly shrink, easily damaged cylinder head (more on the same cylinder rupture between the two gas entrance) and the cylinder liner (the bottom of the cylinder protruding shoulder fracture).
Sixth, start the engine oil increases. That is, before the start, from adding a small amount of oil into the trachea, in order to improve the sealing performance cylinder parts, which will help start the engine. For serious engine wear, to take this approach, although able to start work on time, but the negative effect is obvious. If you often use this method start, easy to produce cement and its piston ring stuck in the ring slot, the cylinder will be a lot of coke increased. The correct approach is: timely repair or replacement of worn cylinder serious parts, to restore the cylinder good sealing performance.
Currently, the market has a low starting point of spontaneous combustion of fuel, which consists of 70% ether, 27% of the 200 solvent oil (or kerosene), 3% of the oil mixture, the ignition temperature of 191 °C. Start with a 10mL syringe draw about starting fuel injected into the trachea to be, and then start the usual method of operation, the diesel engine that is smooth on fire. However, this method starts to pay special attention to safety, because the starting point of spontaneous combustion of fuel is low, is as volatile and evaporate easily cause a fire. So, to start the fuel in closed containers, stored in low temperature storage, and should stay away from the fire source. Start using the fuel, the amount of each injection is not too much; forbidden to start adding diesel fuel tank to prevent air resistance or fire.