Diesel engines have 8 features, advantages and benefits

In 1892, the German inventor Rudolf Diesel (Rudolf Diesel) invented the Diesel engine to today has been more than 120 years past, the Diesel engine is used in a variety of mechanical equipment, the characteristics, advantages, benefits of the Diesel engine what do you know?

1. The advantages of diesel engines are large output torque, high thermal efficiency and good fuel economy.
2. Diesel engine and gasoline engine are the same, each working cycle also goes through intake, compression, power, exhaust four strokes.
3. But because the diesel fuel is diesel, its viscosity is bigger than gasoline, not easy to evaporate, the ignition point is lower than gasoline, the mixture in the cylinder of the diesel engine is compression ignition, so the diesel engine does not need the ignition system.
4. When the diesel engine works, the air is sucked into the cylinder. When the air in the cylinder is compressed to the end point, the temperature can reach 500-700℃ and the pressure can reach 40-50 atmospheres. When the piston is near the top dead center, the injector nozzle of the oil supply system injects fuel into the cylinder combustion chamber at extremely high pressure in a very short period of time. The diesel oil forms fine oil particles, which are mixed with the air of high pressure and high temperature. The combustible mixture burns by itself, and the explosive force is generated by violent expansion, which pushes the piston to do work downward. The pressure can be up to 60-100 atmospheres, so the diesel engine produces a lot of torque.
5. Due to the high working pressure of diesel engine, the relevant parts are required to have higher structural strength and stiffness, so the volume of diesel engine is relatively large; The manufacture precision of fuel injection pump and nozzle of diesel engine is high.
6. In addition, diesel engine work rough, vibration noise; Diesel oil is not easy to evaporate and cold start at low temperature is more difficult than gasoline engine. In addition, diesel engine has lower power index than gasoline engine (lower speed), and more soot and particle (PM) emissions than gasoline engine. As a result of the above characteristics, early diesel engine is generally used in large and medium-sized truck and related engineering vehicles and equipment.
7. With the development of diesel engine technology, a number of advanced technologies, such as direct injection, turbocharged and inter-cooled, electric control, common rail technology application in diesel engine, make originally the disadvantages of the diesel engine has been better solved, and the advantage in energy saving and CO2 emissions of diesel engine, is all, including gasoline engine, the heat engine can’t replace.
8. Today, diesel engine has been widely used in trucks, pickups, SUV, excavators, forklifts, generators, garden machinery, agricultural machinery and many other fields.