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| Hydrostatic Fan Drives |
| Fan System Comparison |
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The performance and torque characteristics of today's combustion engines demand high cooling power even at low engine speeds. Due to tightened exhaust standards, the space requirements for coolers and fans have also increased by as much as 15 percent. As a result, it is necessary to freely arrange the cooler with respect to the combustion engine. By separating the combustion engine and cooler, it is possible to optimally utilize the previously unused areas.
For fan drives, several technologies can be used: |
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Mechanical drive
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Electromagnetic coupling
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Hydrostatic fan drive
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Fan diagram
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Fan diagram
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Fan diagram
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With the conventional mechanical drive, the fan speed is directly related to the combustion engine speed. This variant achieves the maximum fan power only at maximum combustion engine speed.
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The drive with an electromagnetic coupling controls the fan speed at a maximum of 3 stages. This variant, too, provides the maximum fan power only at maximum combustion engine speed.
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The hydrostatic fan drive from Rexroth decouples the fan speed and combustion engine speed. Thus, the system solution steplessly controls the fan independent of the combustion engine speed from minimum to maximum speed. Contrary to mechanical drives and electromagnetic couplings, the hydrostatic fan drive from Rexroth generates maximum fan power even at low combustion engine speeds.
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