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)

M_t – torque moment

n – revolutions

p_e – mean effective pressure

V_z – engine capacity

k – coefficient for four cycle engine k = 2

Pe=mP⋅Hu⋅ηc

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

H_u – 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