The following data apply to a four – stroke SI engine: Number of cylinders 4 Cylinder bore 75mm Stroke 80mm Cylinder clearance volume 47cm3 Engine speed 5000 rpm Brake torque 110 Nm Fuel consumption rate 0.005 kg/s Calorific value of fuel 42 MJ/kg Indicated mean effective pressure 1.15 Mpa. Determine the following: a) The compression ratio. b) Brake power c) Brake efficiency d) Indicated power e) Indicated efficiency f) Mechanical efficiency g) Brake mean effective pressure h) Ideal air – standard cycle efficiency i) Brake – specific fuel consumption.
The following data apply to a four – stroke SI engine:
Number of cylinders 4
Cylinder bore 75mm
Stroke 80mm
Cylinder clearance volume 47cm3
Engine speed 5000 rpm
Brake torque 110 Nm
Fuel consumption rate 0.005 kg/s
Calorific value of fuel 42 MJ/kg
Indicated mean effective pressure 1.15 Mpa.
Determine the following:
a) The compression ratio.
b) Brake power
c) Brake efficiency
d) Indicated power
e) Indicated efficiency
f)
g) Brake mean effective pressure
h) Ideal air – standard cycle efficiency
i) Brake – specific fuel consumption.
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