| 摘要 |
<p>A nozzle for improving the atomisation quality of fuel flowing from a fuel injector and toward the combustion chamber of an internal combustion engine includes a supply plate (140) having a supply orifice (144) through which the fuel flows. The supply plate (140) includes a circumferential edge section (141, 142) forming an acute angle of less than 90° for defining a narrowed cross section within a downstream section of the supply orifice (144) for generating downstream turbulence in the fuel flowing adjacent thereto. A metering plate (120) is spaced from the supply plate so as to define therebetween a turbulence cavity (160) for containing therein at least a portion of said downstream turbulence from the supply plate. The metering plate (120) includes therein at least one metering orifice (124, 134) through which the fuel from the turbulence cavity is expelled. The metering plate (120) further includes a circumferential edge section having an acute angle of less than 90° for defining a narrowed cross section within an upstream section of the metering orifice (124, 134) for generating downstream turbulence in the fuel flowing adjacent therethrough. The circumferential edge of the exhaust plate is offset in the direction of fluid flow by a distance y and offset in a direction generally perpendicular to the direction of fluid flow by a distance x, with the ratio of x/y being greater than 0.5 in order to minimise the Sauter mean diameter of atomised fuel injected therethrough.</p> |
