Üniversite: Uludağ Üniversitesi
Bölüm: Fen Bilimleri Enstitüsü
YÜKSEK LİSANS VE DOKTORA ÖĞRENCİLERİ
İBRAHİM KORKMAZ (1989)
Motorlu taşıtlarda bazı termik ve dinamik parametrelerin incelenmesi
-Ml- The driving cycle named “A comparative Driving Cycle for City Passenger Buses ” considers a distance of BOO meters between two bus stations. The -fuel consumption of the bus for 10 bus stations is calculated. Then the distance between the bus stations is extended to 1000 meters and the fuel consumption is calculated for S bus station. The total travelling distance is constant for both situations. Thus the fuel consumption difference gives the fuel economy for the constant distance that is SOOO meters. If the model vehicle does not carry any extra load, there is no slope and the vehicle travels on a paved road (asphalt), the result is of 4.5 V. percent fuel economy. Since no power is transmitted to the tires of the vehicle, the effective engine power and thus the brake mean effective pressure can not be determined. So that the specific fuel consumption of the vehicle, when the clutch pedal is pressed or when no power is transmitted to the tires of the vehicle from its engine can not be determined by using the performance curves. In such cases the fuel consumption of the vehicle is calculated by means of idling fuel cosumption of the engine. If consumption is directly equal to the idling fuel consumtion. However, vhen the engine rate is different to the idling engine rate, the fuel consumption is different from the idling fuel consumption too. The fuel consumption in these situations is calculated by the equation m =m _.n /n,_, where “m _,” is the idling fuel *?> y yR e eR yR a consumption, “n _” is the idling engine rate and “n ” is the engine rate just before the clutc pedal is pressed. The computer program includes 13 subroutines. When the program is run, a selection menu is offered and according to the selection some of the subroutines are used. – XI ı- An important point to be emphasized is that the performance curves given in this study are drawn aproximately by means of the full throttle curves. The real performance curves of the model engine are supposed to be different. The computer program submitted in this study may be used to optimize the behaviour of the driver by adding some subroutines or making some reorganizations. For instance if the distance and the time are certain, the behaviour of the driver to minimize the fuel consumption can be determined. However, this topic does not exist in this study.