Question: A four stroke, four-cylinder diesel engine running at 2000rpm develops 60kW. Brake thermal efficiency is 30% and calorific value of the fuel is 42MJ/kg.

A four stroke, four-cylinder diesel engine running at 2000rpm develops 60kW. Brake thermal efficiency is 30%

A four stroke, four-cylinder diesel engine running at 2000rpm develops 60kW. Brake thermal efficiency is 30% and calorific value of the fuel is 42MJ/kg. Engine has a bore of 120mm and stroke of 10mm. Take pair = 1.15kg/m, air-fuel ratio = 15:1 and mechanical efficiency = 80%. Calculate; 1- Fuel consumption (kg/s) 2- Volumetric efficiency 3- Brake mean effective pressure, and 4- Mean piston speed.

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