Price of Auto Best Engine Replacement Service
Vehicle Engine has the advantage of high torque, good economic performance. Vehicle Engine work with gasoline engines have many of the same places, each working cycle also experienced intake, compression, work, exhaust four strokes. However, because the fuel used in Vehicle Engines is diesel,...
Vehicle Engine has the advantage of high torque, good economic performance. Vehicle Engine work with gasoline engines have many of the same places, each working cycle also experienced intake, compression, work, exhaust four strokes. However, because the fuel used in Vehicle Engines is diesel, its viscosity is larger than gasoline, not easy to evaporate, and its spontaneous combustion temperature is lower than gasoline, therefore, combustible mixture formation and ignition methods are different with the gasoline engine.
The difference is that the mixture in the cylinder of the Vehicle Engine is calendering, not ignited. Vehicle Engine work, into the cylinder is the air, the air in the cylinder compressed to the end of the time, the temperature can reach 500-700 ℃, the pressure can reach 40-50 atmospheres. When the piston approaches the top dead center, the fuel injector of the oil supply system injects fuel into the cylinder combustion chamber with extremely high pressure in a very short period of time. The diesel oil forms fine oil particles and mixes with the high pressure and high temperature air. The combustible mixture burns itself , The violent expansion of the explosive force, to promote the piston down work, this time the temperature up to 1900-2000 ℃, the pressure up to 60-100 atmospheres, resulting in a large torque, so the Vehicle Engine widely used in large diesel equipment.
The characteristics of the traditional Vehicle Engine: thermal efficiency and economy is better, the Vehicle Engine to use compressed air approach to improve the air temperature, so that the air temperature exceeds the ignition point of diesel, then sprayed with diesel, diesel spray and air mixing while burning The Therefore, the Vehicle Engine without ignition system. At the same time, the diesel fuel supply system is relatively simple, so the reliability of Vehicle Engines than the gasoline engine is better. Due to the limitations of deflagration and the need for spontaneous combustion of diesel, the Vehicle Engine compression ratio is high. Thermal efficiency and economy are better than the gasoline engine, while the same power in the case, the Vehicle Engine torque, the maximum power of the low speed, suitable for the use of trucks.
But the Vehicle Engine due to the work pressure, requiring the relevant parts with high structural strength and stiffness, so the Vehicle Engine bulky, larger; diesel fuel injection pump and nozzle manufacturing requirements are high, so the cost is higher; In addition, the Vehicle Engine rough , Vibration noise; diesel is not easy to evaporate, cold start in winter difficult. Due to the above characteristics, before the Vehicle Engine is generally used for large, medium-sized truck on the truck. Traditionally, Vehicle Engines are relatively bulky and lighters are not as good as gasoline engines (lower speed), noise and vibration, and smoke and particulates (PM) emissions are so severe that they have been favored by cars. In particular, the new development of small high-speed Vehicle Engines, a number of advanced technologies, such as electric direct injection, common rail, turbocharged, cold and other technologies to small Vehicle Engine applications, so that the original Vehicle Engine shortcomings have been Better solution, and Vehicle Engine in energy saving and CO2 emissions advantages, including the gasoline engine, including all the heat engine can not be replaced, a "green engine."