Fuel injection nozzle with multi-angle spray orifices

Abstract

The invention discloses a fuel injection nozzle with multi-angle spray orifices, which comprises a needle valve and a needle valve body, and is characterized in that at least three main spray orifices are uniformly arrayed around the axis in the needle valve body; more than two auxiliary spray orifices corresponding to each main spray orifice are arranged on the needle valve body; the auxiliary spray orifices are communicated with the corresponding main spray orifice and branched in the same position in the corresponding main spray orifice; the axes of the auxiliary spray orifices on each main spray orifice are distributed on the same vertical plane; the auxiliary spray orifices are distributed in a diffused manner by taking the branch position in the main spray orifice as the center; an included angle is formed between axes of adjacent auxiliary spray orifices; the cross section area of each main spray orifices are less than the sum of the cross section areas of the corresponding auxiliary spray orifices; due to change of the movement direction, the fuel generates stronger vortexes in the branch position of the auxiliary spray orifices, and then is sprayed out from the auxiliary spray orifices, so that the atomization intensity of the fuel is enhanced; and as the auxiliary spray orifices spray fuel mist in different directions, the fuel spray space is enlarged, the atomization intensity is higher, the fuel and gas mixture is more uniform, the combustion is more sufficient, the energy-saving and emission reduction are facilitated, and the economic and social benefits are remarkable.

Description

technical field [0001] The invention relates to an in-cylinder direct-injection internal-combustion engine fuel injection device, in particular to a multi-angle injection hole fuel injection nozzle, which is used to realize multi-angle fuel 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 or...

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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