柴油的粘度对柴油机的运行影响很大,在已知温度下,粘度决定着燃料的流动性和向喷油嘴供油的性质,也影响供油系统的各种性能。 一、粘度对雾化的影响 随着柴油粘度的增加,喷油时柴油分子间的相互作用力便增加,对喷柱分散的作用不利,因此柴油的粘度愈大,雾化愈劣;反之,粘度小时,油滴平均直径较小,低劣的雾化状况导致混合气不均匀、燃烧不完全,因此,燃料消耗量大,发动机的经济性下降。 The viscosity of diesel has a great influence on the operation of a diesel engine. At a known temperature, the viscosity determines the fluidity of the fuel and the nature of the fuel supplied to the fuel injector, as well as the performance of the fueling system. First, the viscosity of the impact of atomization With the increase of diesel viscosity, diesel injection when the intermolecular interaction will increase, the dispersion of the spray column adversely, so the greater the viscosity of diesel, the worse the atomization; the other hand, When the viscosity is small, the average diameter of the oil droplets is small, and the poor atomization condition results in uneven mixture and incomplete combustion. Therefore, the fuel consumption is large and the economy of the engine is reduced.