Answer to Question #260645 in Mechanical Engineering for Nilesh

Question

A single cylinder four stroke internal combustion engine develops 30 kW at 300 rev/min. The

turning-moment diagram for the expansion and compression strokes may be taken as two isosceles

triangles, on bases 0 to π and 3π to 4π radians respectively, and the net work done during the

exhaust and inlet strokes is zero. The work done during compression is negative and is one quarter

of that during expansion. Sketch the turning moment diagram for one cycle and find the maximum

value of the turning moment during expansion. If the load remains constant, mark on the diagram

the points of maximum and minimum speed. Also find the moment of inertia, in kg m 2

, of a flywheel

to keep the speed fluctuation within ±1.5 per cent of the mean speed.

Answer 1

The answer to your question is provided in the image: