Investigations of the Multiple Fuel Injection and Atomization with the Use of Two Outward-Opening Injectors

The paper discusses the results of investigations into fuel atomization with the use of two high-pressure angularly arranged injectors fitted in a combustion of constant volume chamber. Using two Direct Injection injectors is a new conception, which was not applied yet. Nowadays, the conceptions where two injectors are used, one in direct injection and one in port injection are used. It is expected, that new gasoline Direct Injection system will allow better fuel spray and following combustion process. It is especially important in spray-guided mixture creating. The analysis mainly relates to the parameters of the fuel spray: spray penetration, observed fuel spray area in reference to both a single fuel spray and two angularly fuel sprays. The assessment of the uniformity of the fuel spray penetration for both sprays has been carried out. The authors have shown a growth in the fuel spray volume and a reduction of the time of the fuel spray penetration during the angularly arranged injection at identical fuel doses (identical accumulative injection duration for a single fuel dose and two angularly fuel doses). In paper there are also presented the research results about multi-injection (three doses) where gasoline is injected into research Constant Volume Chamber. The penetration depth and area occupied by injected fuel into CVC during injection with different configurations were analyzed.