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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The testing object was the Bosch fuel injector of a catalogue No. 0445110083. Laboratory tests were carried out on the test bench STPiW 3. The research object worked in an engine powered by methyl ester of rapeseed oil that ran 101273 km. Next, one fuel injector and measurements of injection and overflow dosages were disassembled. Then, the fuel injector was disassembled into its constituent parts and examined under a microscope. The test results are presented in Tables 1 and 2 and Fig. 3 – 6.

Table 1. Injection and overflow dosages fuel injector working on biofuel. No. Pressure [MPa] Injection time[ µ s] Range [mm 3 /H] Dosage [mm 3 /H] 1 145 0 0.0 60 s 0.00 – 72.00 43.2 2 135 780 34.71 – 49.69 35.3 16.00 – 58.00 54.2 3 30 420 0.31 – 3.89 0.7 0.00 – 58.00 23.1 4 80 260 0.31 – 4.09 1.2 0.00 – 58.00 31.8 Table 2. Injection and overflow dosages new fuel injector. No. Pressure [MPa] Injection time [ µ s] Range [mm 3 /H] Dosage [mm 3 /H] 1 145 0 0.0 60 s 0.00 – 72.00 18.3 2 135 780 34.71 – 49.69 46.7 16.00 – 58.00 22.5 3 30 420 0.31 – 3.89 2.8 0.00 – 58.00 15.3 4 80 260 0.31 – 4.09 1.6 0.00 – 58.00 17.8

Fig. 3. The dynamic change parameters of injection dosages between the new and tested fuel injectors 1 – full load dosage, 2 – idling dosage, 3 – pilot dosage.