Advantages Of Diesel Engines

The advantages of diesel engines are large torque and good economic performance. Each working cycle of a diesel engine also goes through four strokes: intake, compression, power and exhaust. However, since the fuel used in diesel engines is diesel, its viscosity is higher than that of gasoline and is not easy to evaporate, and its auto-ignition temperature is lower than that of gasoline. Therefore, the formation and ignition method of the combustible mixture are different from those of gasoline engines. The main difference is that the mixture in the diesel engine cylinder is compression ignited rather than ignited. When the diesel engine is working, air enters the cylinder. When the air in the cylinder is compressed to the end, the temperature can reach 500-700°C and the pressure can reach 40-50 atmospheres. When the piston is close to the top dead center, the high-pressure pump on the engine injects diesel into the cylinder at high pressure. The diesel forms fine oil particles, which are mixed with the high-pressure and high-temperature air. The diesel mixture burns on its own, expands violently, and generates explosive force, pushing the piston downward to perform work. , the temperature at this time can reach 1900-2000°C, the pressure can reach 60-100 atmospheres, and the torque generated is very large, so diesel engines are widely used in large diesel vehicles.