A 2 litre four stroke direct injection diesel engine is designed to run at 4500 rpm with a power output of 45 kW . The volumetric efficiency is found to be 80 percent. The brake specific fuel consumption is $0.071 \mathrm{~kg} / \mathrm{MJ}$ and the fuel has a calorific value of $42 \mathrm{MJ} / \mathrm{kg}$. The ambient conditions for the test were 200 C and 1 bar. Calculate (c) Air fuel ratio
Explanation
To calculate air-fuel ratio, we need to find the mass of air first. We can find the mass of air using the ideal gas equation. Then, we can calculate the air-fuel ratio using the formula.
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