Contributing EfficiencyPreserving Energy

Energy is precious. Therefore, no fuel should be wasted in passenger transport. Fortunately, this is not necessary: Thanks to efficient commercial vehicle transmissions by ZF, with and without hybrid technology and lightweight components in the chassis.

Ideal gear selection for buses

Ideal gear selection for buses With the EcoLife 6-speed automatic transmission for city buses and suburban buses, the topography-dependent TopoDyn Life shifting strategy finds the correct gear because it permanently adjusts the shifting points to the terrain profile during the journey. This pays off in particular on hilly routes, on which buses without TopoDyn Life constantly have to travel in a high speed range, and engine revving is too high even on more level sections. TopoDyn Life enables fuel savings of between five and ten percent compared to transmissions without this shifting strategy. Further advantages: With TopoDyn Life, the transmission has a longer service life, improved braking performance, and is quieter in operation.

There is also a hybrid version of the EcoLife 6-speed automatic transmission. Depending on the journey profile, it offers fuel savings of up to 20 percent compared to conventional transmissions. Inner-city application is characterized by many setting off and braking actions as well as frequent load changes, especially when it comes to buses. Bus stops are commonly less than one kilometer apart. In this environment, the hybrid module for EcoLife demonstrates its full potential.

E-vehicles on track

Naturally, a high frequency of bus stops in inner-city traffic offers the opportunity to recuperate energy during braking. This is an ideal condition for the application of the AVE 130 low-floor electric portal axle that ZF uses to support electric driving in city traffic. Here, electric wheel-hub motors are integrated into a low-floor axle and obtain their drive energy from the energy accumulator. Depending on the energy concept, a diesel generator or fuel cell takes care of the power generation. Otherwise the power feed is performed by a battery or an overhead contact line.

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