ZF chooses radial motor technology for its hydrostatic transmission

ZF has chosen a pair of radial hydraulic motors for use in its compact single-speed hydrostatic transmission, the 2HC85, which has been developed for compact wheeled loaders up to 100kW and 10.5tonnes operating weight. For high-torque start-up, the transmission sends oil to both motors and demands maximum stroke to travel from 0-16kph, before isolating one motor and then using 100% oil flow through the remaining motor to propel the machine to its maximum travel speed of 42kph. ZF said radial motors afford a

January 6, 2017 Read time: 1 min

Two five-piston radial motors are used in ZF’s 2HC85 transmission

2304 ZF has chosen a pair of radial hydraulic motors for use in its compact single-speed hydrostatic transmission, the 2HC85, which has been developed for compact wheeled loaders up to 100kW and 10.5tonnes operating weight.

For high-torque start-up, the transmission sends oil to both motors and demands maximum stroke to travel from 0-16kph, before isolating one motor and then using 100% oil flow through the remaining motor to propel the machine to its maximum travel speed of 42kph.

ZF said radial motors afford a lower working speed range within the transmission and create a more compact package compared to axial motors, which leads to greater installation options and a low working noise level compared to traditional hydrostatic transmission designs.

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ZF looks to combine hybrid module with cPower CVT transmission

ZF used bauma 2013 to show the next stage of development for its cPower continuously variable transmission (CVT). By combining the transmission with a hybrid module, ZF said greater operating efficiencies were available from the integration of start/stop technology and energy recovery from regenerative braking. Potentially, the hybrid drive system has the ability to boost fuel efficiency by up to 25% in addition to the 20% higher operating efficiency already offered by the cPower transmission, said ZF.