Question

A vehicle which is equipped with a 4 cylinder, 2000 cc spark ignition engine is cruising at an average speed of 120 km/h from Ankara to Izmir on the highway. The mass of the vehicle with single driver is 1400 kg and its projected frontal area is 3 m2. The coefficient of rolling resistance is 0.017 and the discharge coefficient is 0.34. The distance between Izmir and Ankara is approximately 600 km. Assuming an average brake specific fuel consumption of 200 g/hp-h, calculate how many liters of fuel will be used during this journey ( fuel = 0.73 g/cc and ambient air density a=1.2 kg/m3).

Answer 1

ANSWER
Given that! - 4 cylinder, 2000CC SI Engine; Average speed N=120 km/h. mass of vehicle, M = 1400KG. projected frontal area A=3m2 coefficient of polling up=0017. dischange coefficient Co=0:34 distance d = 600km, Hence time taken by the vehicle tad 17 t 600 120 t-shours Total power taken by the engine = Poweg overcame to air drag+ power to ovescome rolling friction. & CO 1/2 PA Va² + 4Riva Ptotal = $x12X8X (12043) 240.014X1400x9-81x120 = 680 +41826 PE= 8462-6W PL= 8462-6 746 hp Pt = 11-343hp. fuel consumption mf = 0.90 kg|hpad. Here given ff +30 kg/m3

od = 0.2X11.343/5 n f = ll34 3kg mif vf x ft. vp's mit PL ve = 11:343 730 vf = 0.015538 vf = 15.54 (tor