First, the diesel engine's "speed" phenomenon and emergency measures "speed" or speeding is a unique phenomenon. "Speeding" when the diesel engine speed out of control, but faster and faster, even more than the maximum allowable speed and accompanied by a huge sound, serious damage to the machine parts will be scrapped. There are two main reasons for causing "speed racing". One is the failure of the fuel pump governor itself, which causes it to lose its normal adjustment characteristics. On the other hand, it has changed the speed regulation characteristics of diesel engines. It is characterized by the fact that the fuel pump governor itself has no failure, and the diesel engine has additional diesel or oil entering the combustion chamber during operation. The occurrence of a "riding car" phenomenon should take emergency measures, otherwise it will cause a breakdown if the engine speed reaches a certain level. Emergency measures to stop speeding include:
1. Quickly retract the accelerator pedal to the parking position;
2. If there is a deceleration device, quickly pull the decompression handle to the oil stop position (or decompression position);
3, timely into the high gear, step down the brake pedal, gently raise the clutch, so that the engine flameout;
4, quickly disconnect the high pressure tubing, stop the oil supply;
5. Quickly tighten the air filter with the clothes to make the engine cut off and turn off the air, which is referred to as “deceleration, decompression, braking, fuel cut, and air shutoffâ€. After the engine is turned off, it is necessary to find out the cause of the "flying car" accident, and to allow the engine to start again after exclusion.
Second, the diesel engine cylinder inspection method Diesel engine cylinder working conditions can be used at idle speed with the following methods to check 1, listening method: with a stethoscope or with a metal stick, close to the injector body parts, listen to the sound of each cylinder burst. The normal sound resembles a metal tapping the "dangdang" sound. If there is only a sound that is not continuous, the cylinder will not provide enough oil or may not catch fire in time. A large hit indicates that the cylinder is too big or the injection time is too early.
2, the color method: the diesel engine is working properly, the exhaust gas color is light gray, the load is slightly deep. If black gas is exhausted, the combustion of combustible gas is incomplete. Rows of blue smoke indicate that the lubricating oil has entered the cylinder for combustion. White smoke indicates that there is water in the diesel fuel, combustible gas is not burned and white smoke is emitted, and the exhaust pipe continuously emits abnormal smoke, indicating that each cylinder is not working properly.
3ã€Temperature sensing method: After the diesel engine is started, it is in the most advanced stage (after a period of working time, the temperature of the pipe is very high, and it will be burned by touching it). The temperature of the manifold of the exhaust pipe of each cylinder can be touched by hand to identify the work of each cylinder. Happening. If the temperature of a cylinder exhaust manifold is higher than that of other cylinders, it means that the fuel supply of the cylinder is high; if the temperature is at the end, the cylinder will have a small amount of fuel, or it will not burn completely after the fuel injection or fuel injection, or it will not burn.
4. Pulsating method: The pressure of the high pressure tubing is squeezed by hand to feel the pulsation of the fuel injection pump. Small pulsation: The supply of oil in the cylinder with weak explosion sound and low temperature is relatively small; the sound of abnormal explosion and high temperature is the drop of fuel injection pressure of the injector, poor atomization of the fuel injection, or inability to timely fire and complete combustion. Large pulsation: Strong explosion and high temperature cylinders provide a large amount of fuel; weak sounds and low temperatures, dry fuel injectors or needle stuck.
5, the oil cut method: In order to accurately determine which cylinder is faulty, you can cut off the high pressure helium pipe by cylinder to the fuel injector iron oil road to stop working to observe the changes in the working conditions of the diesel engine. When cutting off the oil circuit of a certain cylinder, if the speed and sound of the diesel engine do not change or change little, the cylinder is working properly. Such as intermittent knocking, black smoke. When the oil path of a certain cylinder is cut off, the fault phenomenon disappears, indicating that the fault is in the cylinder.
Third, the five fuel-efficient diesel engines 1, the use of fuel-saving smoke reducer. The fuel-saving smoke reducer is vertically fixed in the front-end oil circuit of the fuel injection pump, and the DC power supply is connected. Used on diesel engines, smoke reduction is significant. Not only reduce environmental pollution, but also save about 5% of oil.
2, install the inertial booster. Installation and use on diesel engines generally increase power by 15% and fuel consumption by 3%-5%. When installing, the inner wall of the air intake pipe should be clean and smooth, and the joints of the pipes should be sealed with gaskets. The pipe must be supported to maintain the stability.
3. Wrap toilet paper on the filter core. 2-3 layers of absorbent toilet paper are wrapped on the diesel oil filter core to improve the cleanliness of the oil and reduce fuel consumption.
4, add foam plastic air filter core. Air filter iron two layers of filter, add a layer of good permeability, about 8-20 mm thick foam, can improve the filter effect, ensure the normal combustion of oil, reduce fuel consumption.
5, return oil pipe diversion. Connect the diesel oil return pipe to the high-pressure oil pipe so that the oil can enter the low-pressure oil line, which can ensure normal combustion, and the fuel-saving effect is very significant.
1. Quickly retract the accelerator pedal to the parking position;
2. If there is a deceleration device, quickly pull the decompression handle to the oil stop position (or decompression position);
3, timely into the high gear, step down the brake pedal, gently raise the clutch, so that the engine flameout;
4, quickly disconnect the high pressure tubing, stop the oil supply;
5. Quickly tighten the air filter with the clothes to make the engine cut off and turn off the air, which is referred to as “deceleration, decompression, braking, fuel cut, and air shutoffâ€. After the engine is turned off, it is necessary to find out the cause of the "flying car" accident, and to allow the engine to start again after exclusion.
Second, the diesel engine cylinder inspection method Diesel engine cylinder working conditions can be used at idle speed with the following methods to check 1, listening method: with a stethoscope or with a metal stick, close to the injector body parts, listen to the sound of each cylinder burst. The normal sound resembles a metal tapping the "dangdang" sound. If there is only a sound that is not continuous, the cylinder will not provide enough oil or may not catch fire in time. A large hit indicates that the cylinder is too big or the injection time is too early.
2, the color method: the diesel engine is working properly, the exhaust gas color is light gray, the load is slightly deep. If black gas is exhausted, the combustion of combustible gas is incomplete. Rows of blue smoke indicate that the lubricating oil has entered the cylinder for combustion. White smoke indicates that there is water in the diesel fuel, combustible gas is not burned and white smoke is emitted, and the exhaust pipe continuously emits abnormal smoke, indicating that each cylinder is not working properly.
3ã€Temperature sensing method: After the diesel engine is started, it is in the most advanced stage (after a period of working time, the temperature of the pipe is very high, and it will be burned by touching it). The temperature of the manifold of the exhaust pipe of each cylinder can be touched by hand to identify the work of each cylinder. Happening. If the temperature of a cylinder exhaust manifold is higher than that of other cylinders, it means that the fuel supply of the cylinder is high; if the temperature is at the end, the cylinder will have a small amount of fuel, or it will not burn completely after the fuel injection or fuel injection, or it will not burn.
4. Pulsating method: The pressure of the high pressure tubing is squeezed by hand to feel the pulsation of the fuel injection pump. Small pulsation: The supply of oil in the cylinder with weak explosion sound and low temperature is relatively small; the sound of abnormal explosion and high temperature is the drop of fuel injection pressure of the injector, poor atomization of the fuel injection, or inability to timely fire and complete combustion. Large pulsation: Strong explosion and high temperature cylinders provide a large amount of fuel; weak sounds and low temperatures, dry fuel injectors or needle stuck.
5, the oil cut method: In order to accurately determine which cylinder is faulty, you can cut off the high pressure helium pipe by cylinder to the fuel injector iron oil road to stop working to observe the changes in the working conditions of the diesel engine. When cutting off the oil circuit of a certain cylinder, if the speed and sound of the diesel engine do not change or change little, the cylinder is working properly. Such as intermittent knocking, black smoke. When the oil path of a certain cylinder is cut off, the fault phenomenon disappears, indicating that the fault is in the cylinder.
Third, the five fuel-efficient diesel engines 1, the use of fuel-saving smoke reducer. The fuel-saving smoke reducer is vertically fixed in the front-end oil circuit of the fuel injection pump, and the DC power supply is connected. Used on diesel engines, smoke reduction is significant. Not only reduce environmental pollution, but also save about 5% of oil.
2, install the inertial booster. Installation and use on diesel engines generally increase power by 15% and fuel consumption by 3%-5%. When installing, the inner wall of the air intake pipe should be clean and smooth, and the joints of the pipes should be sealed with gaskets. The pipe must be supported to maintain the stability.
3. Wrap toilet paper on the filter core. 2-3 layers of absorbent toilet paper are wrapped on the diesel oil filter core to improve the cleanliness of the oil and reduce fuel consumption.
4, add foam plastic air filter core. Air filter iron two layers of filter, add a layer of good permeability, about 8-20 mm thick foam, can improve the filter effect, ensure the normal combustion of oil, reduce fuel consumption.
5, return oil pipe diversion. Connect the diesel oil return pipe to the high-pressure oil pipe so that the oil can enter the low-pressure oil line, which can ensure normal combustion, and the fuel-saving effect is very significant.
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