Question

In: Mechanical Engineering

A high performance 4 stroke supercharged gasoline engine is being designed. The target specifications are as...

A high performance 4 stroke supercharged gasoline engine is being designed. The target specifications are as follows:

  1. IMEP: 25 bar at peak power
  2. bsfc:    237 g/kWh
  3. isfc:     211 g/kWh
  4. Bore to stroke ratio:    1.1
  5. Number of cylinders: 4
  6. Maximum mean piston speed: 21 m/s
  7. Compression ratio: 10.5:1
  8. Simulation results indicate that the indicated work per cylinder per cycle needs to be 1550 J/cyl/cyc.

Based on the provided information, finalize the engine design for the following parameters:

  1. Bore and stroke (mm)
  2. Engine displacement (litre)
  3. Engine Speed at peak power (rpm)
  4. Peak brake power (kW)
  5. Fuel flow rate at peak power (kg/hr)
  6. The minimum cylinder volume (cm3)

Solutions

Expert Solution

  1. Bore = 95.3 mm
  2. stroke = 95.3 mm
  3. Engine displacement = 679 liter
  4. Engine Speed at peak power = 4208.5 rpm
  5. Peak brake power = 8.28 kW
  6. Fuel flow rate at peak power = 1.96 kg/hr
  7. The minimum cylinder volume (cm3)

samet mamat answered 1 year ago
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