New variable motor from Rexroth cools and cleans without additional valve

•   Integrated reversing function and up to 16 % less installation length

• Reversing operation without additional components

• Up to 16 % shorter than customary products

• Efficiency of the hydrostatic fan drive increased

With the new axial piston variable motor A10VER manufacturers of construction, agricultural and forestry machinery can achieve compliance with exhaust emission values with low system costs and less installation space for the hydrostatic fan drive. For applications with high dirt and dust loads, it offers a cleaning function for coolers via reversing operation without additional components.

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In order to comply with the exhaust emission limits of TIER 4 final or Stage IIIb and IV, the manufacturers of mobile working machines must also adapt the engine management of diesel engines in addition to exhaust gas after-treatment. However, this means increased cooling capacity requirements, since the temperature window for optimum engine operation is strongly reduced. At the same time, the cooling capacity must be available independent of the diesel engine speed. Hydrostatic fan drives from Rexroth provide an energy efficient solution which also has the necessary robustness.

The new axial piston variable motor A10VER reduces the system costs, since it offers a reversing function without the necessity of an additional valve to be piped. The motor changes the direction of rotation of the fan during running operation. By reversing the air flow, dirt, dust or plant parts are removed from the cooling fins. Even under the harsh everyday conditions of construction, agricultural and forestry machinery the full cooling capacity is maintained. Since there is no additional reversing valve, the efficiency of the hydrostatic fan drive is also increased. This leads to fuel savings in the mobile working machine.

Due to the components for exhaust cleaning, the manufacturers of mobile working machines have less installation space to work with. While developing the new axial piston variable motor A10VER, Rexroth met the need for even more compact dimensions. The axial piston variable motor A10VER in the sizes 30 ccm, 37 ccm and 45 ccm is up to 16 % shorter than customary products. Rexroth is already developing further sizes. The motor can be seamlessly integrated into the system solutions for hydrostatic fan drives from Rexroth such as the axial piston variable pump A1VO and A10VO, the BODAS RC control units from the series 30 and the Software Automatic Fan Control AFC30.