PSI - Issue 16

Jacek Eliasz et al. / Procedia Structural Integrity 16 (2019) 273–280 Jacek Eliasz et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 7. The results of measurements of emission (a) nitrogen oxides, (b) carbon monoxide of the engine working on standard and modified fuel injectors.

Fig. 8. Results of measurements of soot in exhaust fumes

5. Conclusion

The use of plant-origin fuels in self-ignition engines should be considered in two aspects: ecological and operational. Research conducted by the authors showed that the process of exploitation wear of fuel injectors working on fuel of plant origin occurs similarly as in the case of conventional fuels. The effects of wear on the elements of precision pairs have such factors as: impurities in the fuel system, both internal and external, the lubricating properties of fuels, the climate in which the vehicle is used and the frequency of filters replacement and periodical inspections of the engine. When analyzing the injection and overflow dosages, it is stated that their values in the tested fuel injector are normal. There are differences between the new and the tested injector, but according to research procedures, they do not exceed the efficiency limits. Based on the analysis of engine tests, it can be concluded that the use of a platinum catalytic coating on the non working part of the fuel injector needle influences the amount of toxic substances released into the atmosphere. The analysis showed that the emission of nitrogen oxides (NO x ), carbon monoxide (CO) and soot were reduced over the entire engine speed range. The use of catalytic coatings in the fuel injector atomizer may reduce the emission of the substance to the environment.