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3. An engine has three cylinders spaced at 120° to each other. The crank torque diagram can be simplified to a triangle having the following values: Angle 0° Torque (Nm) 0 (a) What is the mean torque? 60° 4500 180° 180° to 360° 0 0 (b) What moment of inertia of flywheel is required to keep the speed to within 180 ± 3 rpm? (c) If one cylinder of the engine is made inoperative and it is assumed that the torque for this cylinder is zero for all crank angles, determine the fluctuation in speed at 180rpm for the same flywheel. (a) 3375 Nm (b) 50kgm (c) ±21 rpm

3. An engine has three cylinders spaced at 120° to each other. The crank torque diagram can be simplified to a triangle having the following values: Angle 0° Torque (Nm) 0 (a) What is the mean torque? 60° 4500 180° 180° to 360° 0 0 (b) What moment of inertia of flywheel is required to keep the speed to within 180 ± 3 rpm? (c) If one cylinder of the engine is made inoperative and it is assumed that the torque for this cylinder is zero for all crank angles, determine the fluctuation in speed at 180rpm for the same flywheel. (a) 3375 Nm (b) 50kgm (c) ±21 rpm

Elements Of Electromagnetics
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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3. An engine has three cylinders spaced at 120° to each other. The crank torque diagram can be simplified to a triangle having the following values: Angle 0° Torque (Nm) 0 (a) What is the mean torque? 60° 4500 180° 180° to 360° 0 0 (b) What moment of inertia of flywheel is required to keep the speed to within 180 ± 3 rpm? (c) If one cylinder of the engine is made inoperative and it is assumed that the torque for this cylinder is zero for all crank angles, determine the fluctuation in speed at 180rpm for the same flywheel. (a) 3375 Nm (b) 50kgm (c) ±21 rpm
Transcribed Image Text:3. An engine has three cylinders spaced at 120° to each other. The crank torque diagram can be simplified to a triangle having the following values: Angle 0° Torque (Nm) 0 (a) What is the mean torque? 60° 4500 180° 180° to 360° 0 0 (b) What moment of inertia of flywheel is required to keep the speed to within 180 ± 3 rpm? (c) If one cylinder of the engine is made inoperative and it is assumed that the torque for this cylinder is zero for all crank angles, determine the fluctuation in speed at 180rpm for the same flywheel. (a) 3375 Nm (b) 50kgm (c) ±21 rpm
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