Lugging Ability

An important feature of tractors that will be used for primary tillage or as a stationary power supply is their lugging ability. Lugging ability is a measure of the amount of temporary overload the tractor can withstand. The lugging ability for a tractor or stationary engine can be illustrated with a horsepower curve. Figure 7.2 shows a power curve for an engine designed with lugging ability. Notice that as the engine is overloaded and the rpm drops from the top engine speed of 2,050 rpm to 1,850 rpm the power increases.

The amount of increase in torque is a measure of the engines lugging ability. Compare the torque curve in Figure 7.2 with the one in Figure 7.3.

1300 1400 1500 1600 1700 1800 1900 2000 2100 RPM

1300 1400 1500 1600 1700 1800 1900 2000 2100 RPM

FIGURE 7.3. Engine torque curve with no lugging ability.

This engine does not have any lugging ability because the torque decreases as soon as the rpm decreases. There is no temporary increase in torque to help the tractor pull through a temporary overload.

+2 0


  • anni
    What is lugging ability of tractor?
    2 years ago
  • ornella
    What is slogging ability of a tractor?
    10 months ago
  • Ruairidh
    What is lugging ability of tractor engine?
    6 months ago

Post a comment