Combustion engines (EN) (VŠ)

Téma: Combustion engines

Předmět: Strojírenství v angličtině

Zaslal(a): beatrice.sanvenero

 

Cylindrical capacity

Vz=(π⋅D^2)/4⋅Z⋅ⅈ

D – cylinder diameter

Z – stroke

i – number of cylinders

 

Effective engine power

Pe=Mt⋅((2π⋅n)/60) = (pe⋅Vz⋅n)/(k⋅60)

Mt – torque moment

n – revolutions

pe – mean effective pressure

Vz – engine capacity

k – coefficient for four cycle engine k = 2

 

Pe=mP⋅Hu⋅ηc

mp – weight fuel flow into engine (kg/s)

Hu – fuel value (J/kg)

– total efficiency of an engine

 

Mean effective pressure of the engine cycle

pe=(k⋅60⋅Pe)/(Vz⋅n)

 

Mechanical efficiency of an engine

ηC=Pe/Pi

Pe – mean effective pressure

Pi – mean inductive pressure

 

Hour fuel consumption (kg/h)

MP=Pe/(ηC⋅Hu)⋅36OO

 

Specific fuel consumption (g/kWh)

mpe=MP/Pe ⋅1000

Power is in kw/Pe

 

Engine torque power

Mt=Pe/((2π⋅n)/60)

M – 1 000 000 = 10 6

K – 1 000 = 10 3

 

Other:

  • Mp=(mpe⋅Pe)/1000
  • ηC=(Pe⋅3600)/(MP⋅Hu)
  • mp=Pe/(Hu⋅ηC)
  • n=(Pe⋅60)/(Mt⋅2π)
  • Pe=(mP⋅Hu⋅ηc)/3600

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