Question: A four cylinder, two-stroke cycle petrol engine develops (30 mathrm{~kW}) at (2500 mathrm{rpm}). The indicated mean effective pressure of each is (800 mathrm{kPa}) and (eta_{text

A four cylinder, two-stroke cycle petrol engine develops $30 \mathrm{~kW}$ at $2500 \mathrm{rpm}$. The indicated mean effective pressure of each is $800 \mathrm{kPa}$ and $\eta_{\text {mech }}=80 \%$. Calculate the diameter and stroke of each of the cylinder if $\frac{L}{D}=1.5$. Also calculate the brake specific fuel consumption of the engine if brake thermal efficiency is $28 \%$. The calorific value of petrol is $44,000 \mathrm{~kJ} / \mathrm{kg}$.

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