Cars - Power and Torque

Sponsored Links

Engine Power

A cars engine power can be calculated as

P = F v / η    (1)

where

P = engine power (W)

F = total resistance (N)

v = velocity (m/s)

η = overall efficiency, normally ranging 0.85 (low gear) - 0.9 (direct drive)

Engine Torque

Engine torque can be calculated as

M = P / 2 π N_e    (2)

where

M = moment (Nm)

Ne = engine speed (rpm)

Wheel Force

Force acting on the wheels

F = M η N_e / (r N_w)    (3)

r = wheels radius (m)

N_w = wheels speed

Sponsored Links

Related Topics

• Dynamics - Dynamics Motion - velocity and acceleration

Related Documents

• Drag Coefficient - The drag coefficient expresses the drag of an object in a moving fluid
• Formulas of Motion - Linear and angular acceleration, velocity and displacement
• Traction Effort - Adhesion and tractive effort