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ZF unveils next generation AxTrax 2 LF low-floor electric axle for city buses

ZF’s Commercial Vehicle Solutions (CVS) division will showcase its advanced new AxTrax 2 LF electric portal axle for low-floor city buses at Busworld 2023, to be held in Brussels from 7 to 12 October.


ZF’s new AxTrax 2 LF low-floor electric axle comes with two stand-alone silicon carbide (SiC) inverters and a high-performance electric control unit, offering an all-inclusive e-drive system for city buses.

AxTrax 2 LF’s compact design maximizes the available space for the passenger compartment or batteries, enabling passenger-friendly bus design concepts. Fitting a similar installation space as its predecessor AxTrax AVE, the new axle is fully compatible with ZF’s air suspension and wheel-end solutions.

On the software side, AxTrax 2 LF also benefits from ZF’s extensive experience in producing functions such as axle condition monitoring and cyber security.

AxTrax 2 LF is available in two variants. These offer continuous power outputs of 260 kW and 360 kW and peak torques of 22,700 N·m and 37,300 N·m. With the more powerful variant, it is possible to achieve a climbing ability of 20% even for articulated buses of up to 29 tons with one driven axle.

Offering up to 10% energy saving compared to the previous generation, the new AxTrax 2 LF offers single-speed operation making it suited for the frequent stop-start nature and relatively lower average speeds of city-bus journeys. Its new oil cooling system adapts the oil flow rate to help maximize efficiency, optimizing operating temperature and lubrication.


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