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A 4 cylinder stroke compression-ignition engine as piston stroke of 10.5cm and cylinder bore of 4 cm. at the mean distance speed of 7m/s. the developed break mean effective pressure is 600 kpa. the break power in kn developed by the engine?
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A 4 cylinder stroke compression-ignition engine as piston stroke of 10...
Calculation of Break Power in a 4 Cylinder Compression-Ignition Engine

Given:

  • Piston stroke = 10.5 cm

  • Cylinder bore = 4 cm

  • Mean distance speed = 7 m/s

  • Break mean effective pressure (BMEP) = 600 kPa



Formula:
Break Power = (2 * π * n * T * L) / 60,000

Where,

  • n = Number of Cylinders

  • T = Torque (Nm)

  • L = Engine Speed (RPM)



Calculation:

  • Cylinder volume = π * (cylinder bore/2)^2 * piston stroke

  • Cylinder volume = π * (4/2)^2 * 10.5 cm = 138.23 cc

  • Total engine displacement = 138.23 cc * 4 cylinders = 552.92 cc

  • Mean piston speed = (2 * mean distance speed) / (π)

  • Mean piston speed = (2 * 7 m/s) / (π) = 4.44 m/s

  • Engine speed = (mean piston speed * 60) / (2 * piston stroke)

  • Engine speed = (4.44 m/s * 60) / (2 * 10.5 cm) = 12.57 RPM

  • Torque = (BMEP * cylinder volume) / 1000

  • Torque = (600 kPa * 138.23 cc) / 1000 = 82.94 Nm

  • Break Power = (2 * π * 4 * 82.94 Nm * 12.57 RPM) / 60,000

  • Break Power = 17.14 kW or 22.98 hp or 22.66 kN



Answer:
The break power developed by the 4 cylinder compression-ignition engine is 17.14 kW or 22.98 hp or 22.66 kN.
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A 4 cylinder stroke compression-ignition engine as piston stroke of 10.5cm and cylinder bore of 4 cm. at the mean distance speed of 7m/s. the developed break mean effective pressure is 600 kpa. the break power in kn developed by the engine?
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