A four-cylinder, four-stroke diesel engine develops a power of 180 kW at 1500 rpm. The b.s.f.c. is 0.2 kg/kWh. At the beginning of injection pressure is 30 bar and the maximum cylinder pressure is 50 bar. The injection is expected to be 200 bar and maximum pressure at injector is set to be about 500 bar.

Assuming the following:

for injector=0.7 , S.G. for fuel=0.875 , Atmospheric pressure = 1 bar, Effective pressure difference=Average pressure difference over the injection period. Determine the total orifice area per injector if the injection takes place over 15°C crank angle.

Power output/cylinder,

Fuel consumption/cylinder,

Fuel injected/cycle,

Time for injection,

Pressure difference at beginning,

Pressure difference at end,

Average pressure difference,

Velocity of injection,

Volume of fuel injected/cycle,