- Off-road vehicles ( bulldozers, back-hoes e.t.c.)
- Trains ( Engine & Transmission Cooling & Air Conditioning)
- Military Vehicles
- On-Road vehicles ( buses, trucks?? e.t.c.)
Why Use Hydraulic Fan Drive ?
Some application cool themselves with their transport speed (trucks) but some machines are static (excavators) so need "forced" ventilation.
It is strange to have a 300 HP engine rev-up for a 10 HP cooling requirement. It is an energy waste and adds-up to heat into the system.
Noise reduction and efficiency improvements require proportional control for the fan speed.
Other reasons to use a hydraulic fan drive system are:
- On some machines maximum fan speed is only required approximately 5% of time.
- Some zones are hotter than others can 'grab' control.
- Overheating damages the connected systems and components.
- Under cooling reduces engine efficiency and life.
- Over-cooling prevents correct vaporization of fuel. Reduces combustion efficiency, wasted fuel and emissions.
- You can reverse the fan direction to clean the fan.
Hydraulic Fan Drive Systems are used in systems for 3 main reasons:
1-Reduce Engine Emissions
- Use less fuel
- Runs at correct temperature
- High speed fan only when required
- Easier to meet Tier 3 & 4 engine emission standards
- Cooling profiles - different machines or areas
2-Increase Cooling System Efficiency
- Cooling on demand. No parasitic losses.
- Higher cooling at low or idle engine RPM.
- High power to weight ratio.
- Located anywhere in target application.
- Improved air flow through radiator.
- Reversible - purge clogged radiators.
3-Increase Vehicle Productivity
- Frees up horse power. Here you can see efficiency improvement figures.
- Reduced noise levels to meet new global legislations
- Less down time, high reliability component life cycles
- Less costly system maintenance
- No pulleys/belts to tighten or replace
Choosing correct circuit and products for hydraulic fan drive system is crucial.
Circuit Types can be
- Known Patent Issues
Fan drive Manifold Blocks