System comparison

Content


Clear advantage for a hydrostatic fan drive system

Today’s combustion engines with their power and torque characteristics demand high cooling power even at low engine speeds. The tightened exhaust standards (Euro 6, US10, TIER 4 and Stage IV) also result in an increase in the space requirement for the radiator and fan by up to 15 percent. To offset this, a fl exible arrangement of the radiator with respect to the engine is needed. By separating the combustion engine from the radiator, previously unused areas can now be optimally utilized.

 

Hydrostatic fan drive

Mechanical drive

Electromagnetic clutch

 

Hydrostatic fan drive

  • Fan speed decoupled from the engine speed
  • Stepless (proportional) control of the fan speed
  • Additional fan power at low diesel engine speed
  • “Cooling on demand“
  • Fuel savings of up to 5 percent
  • Reduced noise levels
  • Flexible layout of the system components
  • Options for fan stop, reverse and splitting the radiator module

Mechanical drive

  • Fan speed directly dependent on engine speed
  • Limited cooling power at low engine speeds
  • Fixed arrangement of the radiator module
  • Sub-optimal noise levels
  • Cost-effective solution for low-cost countries

Electromagnetic clutch

  • Fan speed variable in three steps
  • Limited fan output at low engine speeds
  • Fixed arrangement of the radiator module
  • Sub-optimal noise levels
  • Cost-effective solution for low-cost countries