current position:brief introduction
diesel engines are diesel combustion engine to obtain the release of energy. it is by the german inventor rudolf diesel (rudolfdiesel) was invented in 1892, to commemorate the inventor of diesel diesel it is to use his last name to represent.
diesel engines and gasoline engines working process has many of the same places, each work cycle has gone through the intake, compression, power, exhaust four stroke. however, since diesel fuel is diesel fuel, the viscosity than gasoline, not easy to evaporate, while the auto-ignition temperature but lower than gasoline, thus forming a combustible gas mixture and ignition are different from the gasoline engine. the main difference is that the diesel engine cylinder gas mixture is compression ignition, not lighted.
compared with gasoline engines, diesel engines have better fuel economy and lower exhaust nitrogen oxides, low speed high torque characteristics, because of its excellent environmental characteristics are respected european cars, and for ride comfort, noise and other shortcomings, at under the advanced european automotive industry, it has not a problem, the current engine performance and operating conditions have been and gasoline is almost the same.
generally works
diesel engine in the intake stroke is pure air sucked in towards the end of the compression stroke, diesel fuel injection pump through the oil increased to 10mpa or more, through the injector injected into the cylinder, in a very short period of time and temperature of the compressed air mixed to form a combustible mixture. because the diesel engine compression ratio (usually 16-22), so the compressed air pressure inside the cylinder end up 3.5-4.5mpa, while temperatures up 750-1000k, much higher than diesel fuel auto-ignition temperature. therefore, after the diesel injected into the cylinder, mixed with air in a very short period of time immediately after burn itself out. the rapid rise in pressure inside the cylinder to 6-9mpa, the temperature rose to 2000-2500k. in the high-pressure gas, driven by the crankshaft driven piston downward movement and rotation for power.
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