A 6-cylinder, 4-stroke Sl engine with a bore of 125 mm and a stroke of 190 mm was supplied during a test with gasoline of composition C = 82% and H2 18% by mass. The dry exhaust composition by volume was CO2 = 11.19%, O2 = 3.61% and N2 = 85.2%. a. Determine the mass of air supplied per kg of fuel, the percentage of excess air and the volume of the mixture per kg of fuel at 17 C and 0.98 bar, which are the conditions for the mixture entering the cylinder during the test. b. Also determine the volumetric efficiency of the engine based on intake conditions when mass of fuel used per hour during the test was 31 kg and the engine speed was 1600 rpm. The fuel is completely evaporated before entering the cylinder and the effect of its volume on the volumetric efficiency should be included Assume the following: Density of petrol vapour as 3.35 times that of air at the same temperature and pressure. 1 kg of air at 0°C and 1.0132 bar occupies 0.7734 m. Air contains 23% oxygen by mass.

A 6-cylinder, 4-stroke Sl engine with a bore of 125 mm and a stroke of 190 mm was supplied during a test with gasoline of composition C = 82% and H2 18% by mass. The dry exhaust composition by volume was CO2 = 11.19%, O2 = 3.61% and N2 = 85.2%. a. Determine the mass of air supplied per kg of fuel, the percentage of excess air and the volume of the mixture per kg of fuel at 17 C and 0.98 bar, which are the conditions for the mixture entering the cylinder during the test. b. Also determine the volumetric efficiency of the engine based on intake conditions when mass of fuel used per hour during the test was 31 kg and the engine speed was 1600 rpm. The fuel is completely evaporated before entering the cylinder and the effect of its volume on the volumetric efficiency should be included Assume the following: Density of petrol vapour as 3.35 times that of air at the same temperature and pressure. 1 kg of air at 0°C and 1.0132 bar occupies 0.7734 m. Air contains 23% oxygen by mass.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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