Cross jet hole fuel spray nozzle

Abstract

The invention discloses a cross jet hole fuel spray nozzle, and is characterized in that at least three main jet holes are arranged on a nozzle valve; more than four even sub-jet holes are arranged on each main jet holes; the sub-jet holes are communicated with the main jet holes, and are crossed in the main jet holes at the same position; the sub-jet holes on each main jet hole are averagely divided into a left half group and a right half group; the left half group and the right half group are symmetrically distributed by using the central line of the main jet holes as a symmetry axis; the adjacent lengthened sections of the central line of the sub-jet holes in the left half group and the right half group between two adjacent main jet holes are crossed; the lengthened sections of the central line of the sub-jet holes of the left half group and the right half group corresponding to adjacent sub-jet holes arranged on both sides in sequence are intersected; the area of the cross section of the main jet hole is smaller than the sum of the areas of the cross sections of the sub-jet holes; fuel is sprayed out from the sub-jet holes at the crotch of the sub-jet holes after a stronger vortex is generated caused by the change of motion direction, and taper cylinder-shaped oil mist sprayed out from the sub-jet holes are respectively intersected to form stronger disturbance; the cross jet hole fuel spray nozzle strengthens the atomizing strength of fuel, and is beneficial to air-fuel mixture; and the combustion is more sufficient so that the fuel spray nozzle is suitable for popularization.

Description

technical field [0001] The invention relates to an in-cylinder direct-injection internal-combustion engine fuel injection device, in particular to a cross-spray hole fuel injector, which is used to realize fuel disturbance injection after vortex flow. Background technique [0002] With the advancement of science and technology, the birth of the internal combustion engine has led to the vigorous development of society. At present, the number of internal combustion engines is huge and is still increasing rapidly. While bringing convenience to mankind, it also aggravates environmental pollution and energy shortages. The emissions of internal combustion engines and the improvement of fuel utilization are particularly important. The degree of atomization of fuel oil in internal combustion engines has a great impact on the economy and emissions of the engine. The methods to increase the atomization intensity mainly include increasing the injection pressure and organizing the fuel ...

AI Technical Summary

Problems solved by technology

The degree of atomization of fuel oil in internal combustion engines has a great impact on the economy and emissions of the engine. The methods to increase the atomization intensity mainly include increasing the injection pressure and organizing the fuel vortex. At present, the high-pressure common rail technology of diesel internal combustion engines can make the injection pressure To 2000bar, but the increase of fuel pressure again is limited by materials and machining accuracy. Organized fuel vortex is a method with broad development prospects. This organized fuel vortex technology is still in the early stage of development and needs technical innovation to improve fog Intensity energy saving and emission reduction

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