PSI - Issue 16

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

278

Fig. 4. Dynamics of the injection overflow parameter change for the new and tested fuel injector 1 – dose when the fuel injector is not working, 2 – full load dose, 3 – idling dose, 4 – pilot dose. a b

Fig. 5. Precision pair and fuel injector needle A – used part of the precision pair, B – impurities in the form of metallic filings on a precise pair, C – corrosion phenomenon on the needle, D – pollutants from fuel. a b

Fig. 6. Elements of the fuel injector control valve A – metallic filings on a precise pair of piston valve, B – corrosion phenomenon and the use of precision pair, C – the phenomenon of cavitations on the control valve.

4. Engine test results

Engine tests were carried out on a dynamometer station using a 359 direct injection fuel engine. The methyl ester of rapeseed oil (B100) was used as a fuel for testing. The engine worked on standard and modified fuel injectors. During the tests ecological parameters of the 359 engine were measured, such as: emission of nitrogen oxides (NO x ), carbon monoxide (CO) and soot content in the exhaust fumes. The test results are presented in Fig. 7 and 8.