Determine the cylinder displacement and engine displacement of an engine having six cylinders with a bore of 400mm and a stroke of 160mm.

An engine has three single-acting cylinders whose cranks are spaced at 120° to each other. The turn- ng moment diagram for each cylinder consists of a triangle having the following values: Angle 0° 60° 180° 180° – 360° Torque (N-m) 200 Find the mean torque and the moment of inertia of the flywheel to keep the speed within 180±3 r.p.m.

3. Determine the displacement of an eight-cylinder engine having a bore of 3.25 in and a stroke of 3 in.

The turning moment diagram for the engine is drawn to the following scales: Turning moment, 1 mm = 1000 N-m and crank angle, 1 mm = - 6°. The areas above and below the mean turning moment line taken in order are : 530, 330, 380, 470, 180, 360, 350 and 280 mm². The mean speed of the engine is 150 r.p.m. and the total fluctuation of speed must not exceed 3.5% of mean speed. Determine the diameter and mass of the flywheel rim, assuming that the total energy of the flywheel to be 15/14 that of rim. The peripheral velocity of the flywheel is 15 m/s. Find also the suitable cross-scetional area of the rim of the flywheel. Take density of the material of the rim as 7200 kg/m³. [Ans. 1.91 m; 8063 kg; 0.1866 m²]