Idling torque

The idling torque or drag torque is understood as the drag loss of a multi-plate clutch that exists when the clutch is open. The primary influencing variables are the dynamic viscosity of the oil, the oil level, the lining width, the number of friction surfaces or friction pairs, the average friction diameter, the speed and the clearance . Secondary influences are the lining surface, use of the friction lining and the properties of the steel counter-plates.

The structure may add other factors, e.g. B. when a coolant pump connected to the shafts of the multi-plate clutch is driven by relative or absolute speed.

As drag torque is also referred to the torque that you need to at a axial piston pump to overcome internal resistance, which is set at a tilt angle of 0 °.