Analysis of the Possibility of Modifying Selected Combustion Parameters of a Rapeseed Oil with n-Hexane Blend in a Compression Ignition Engine by Changing the Start of Injection of the Second Pilot Injection and the Main Injection
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Tatarynow Dawid Jarosław, Sander Przemysław, Merkisz Jerzy |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 21 |
| Wolumen/Tom: | 19 |
| Numer artykułu: | 5353 |
| Strony: | 1 - 24 |
| Impact Factor: | 3,9 |
| Web of Science® Times Cited: | 0 |
| Bazy: | Web of Science |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 7 listopada 2026 |
| Abstrakty: | angielski |
| Rapeseed oil has a viscosity several times higher and a lower cetane number than diesel fuel; therefore, its use in engines with a common rail injection system requires adjustment of the injection control. The addition of 10% n-hexane (OR90Hex10) brings the physicochemical properties of rapeseed oil closer to those of conventional fuel; however, the factory maps of the engine control unit remain calibrated for diesel fuel. The aim of this study was to assess the effect of the start of injection (SOI) of the second pilot injection and of the main injection on the combustion parameters of the OR90Hex10 blend under urban driving conditions. The tests were carried out on a complete vehicle (Fiat Qubo 1.3 Multijet, Euro 5) on a chassis dynamometer at a constant speed of 50 km/h and a load resulting from road resistance, at an operating point at which the production control unit does not execute the first pilot injection, so that the injection sequence consisted of the second pilot injection and the main injection, whose common start angle was the parameter varied in this study. The injection timing map was modified in WinOLS, obtaining a coupled shift in both phases from −6 to +3 °CA. The indicating parameters were recorded using the AVL IndiMicro system and averaged over 100 cycles. The highest indicated mean effective pressure, 0.537 MPa, was obtained at the nominal setting, and each correction reduced it by 5.0–12.1%. Advancing by 6 °CA increased the maximum rate of pressure rise to 0.575 MPa/°CA and the maximum pressure to 7.33 MPa, whereas retarding by 3 °CA reduced them by 18.6% and 14.4%, respectively. A correction of −1 °CA reproduced the combustion parameters of diesel fuel to within 1.5%, with differences in maximum pressure, rate of pressure rise and angle of maximum pressure that were not statistically significant. The SOI of both injection phases therefore makes it possible to limit mechanical loads rather than to increase the indicated mean effective pressure. |
