The institution that converts the internal energy into kinetic energy is called an engine. The form of automobile engines mainly use cylinders and pistons as the internal combustion engine of the conversion mechanism.According to the different forms of fuel and ignition, it can be divided into auto ...
Type of engine
The institution that converts the internal energy into kinetic energy is called an engine. The form of automobile engines mainly use cylinders and pistons as the internal combustion engine of the conversion mechanism.According to the different forms of fuel and ignition, it can be divided into gasoline or diesel engines, or engines with hydrogen, natural gas, petroleum gas as fuel. The combustion form is small from the gasoline engine.Based on the characteristics of the work cycle and the piston stroke, it can be divided into two -way and four -way engines. The car engine involved in this website is mainly a four -stroke gasoline engine or a four -stroke diesel engine.Let me take you to understand the differences between gasoline engines and diesel engines and their working principles.China
The four rushing -in automotive engines include cylinder, piston, piston link, crankshaft, gas distribution mechanism (valve, camshaft, etc.), spark plugs (gasoline engines), in -cylinder fuel jet mouths (diesel engine, and gasoline engines with direct injection technology in the cylinder.), Oil pump and oil circulation, water pump and water circulation, another series of sensors and many components such as ECU.
Petrol Engine
Gasoline engines are gasoline as fuel engines.Due to the small gas sticky viscosity and fast evaporation, the gasoline injection system can be sprayed into the cylinder with the gasoline injection system. After reaching a certain temperature and pressure, it can be lit with a spark plug to expand the gas to work.The characteristics of gasoline engines are high speed, simple structure, light quality, low cost, and stable operation.
Compared with diesel engines, gasoline engines have low noise, smooth operation, easy to start in winter, large engine speed range (1000-7000rpm), and fast response speed.
The disadvantage of the gasoline engine is that the thermal efficiency is lower than the diesel engine, the fuel consumption is high, the ignition system is more complicated than the diesel engine, and the convenience and convenience of maintenance and maintenance are not as good as that of diesel engines.
Diesel engines
Diesel engine is a engine that burns diesel to obtain energy release.It was invented by German inventor Rudolfdiesel in 1892. To commemorate the inventor, diesel is represented by his surname Diesel.
The working process of diesel engines has many same places as gasoline engines, and each working cycle also experiences four strokes: intake, compression, work, and exhaust.However, because the fuel for diesel engine is diesel, its viscosity is larger than gasoline and is not easy to evaporate, but its spontaneous combustion temperature is lower than that of gasoline. Therefore, the formation of combustible mixed gas and ignition are different from gasoline engines.The difference is that the mixed gas in the diesel engine cylinder is burned, not ignited.
Compared with gasoline engines, diesel engines have the characteristics of good fuel economy, low nitrogen oxidation compounds in the tail gas, low -speed and large torque. They have been respected by European cars due to their excellent environmental protection characteristics.Under the advanced automotive industry, it is no longer a problem. The current performance and conditions of diesel engines are almost the same as that of gasoline engines.
Most working principle
The diesel engine inhale in the intake itinerary is pure air. When the compression itinerary is approaching the end, the diesel oil pressure is increased to more than 10MPa through the injector pump.Mixing, forming a combustible mixed gas.Due to the high compression ratio of diesel engine (generally 16-22), the air pressure in the cylinder can reach 3.5-4.5MPa at the end of the compression, and the temperature is as high as 750-1000K, which greatly exceeds the spontaneous combustion temperature of diesel.Therefore, after the diesel is sprayed into the cylinder, it will be burned immediately after mixing with the air in a short time.The air pressure in the cylinder rose rapidly to 6-9MPa, and the temperature rose to 2000-2500K.Driven by high -pressure gases, the piston moved downward and drove the crankshaft to rotate.

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