The Mercedes-Benz Citaro and eCitaro make up a large family which offers the right drive technology for almost any application. Available for selection are the fully-electric and locally emission-free eCitaro, the Citaro with low-emission and extremely economical diesel engines, almost CO2-neutral gas engines (when used in conjunction with biogas and biomethane), as well as well‑thought-out and economical hybrid technology for diesel and gas engines.
Citaro with diesel engine: undercuts emissions limits in practical operation
Transport companies can select from numerous drive variants for the Citaro. The basis of these are the clean and extremely economical diesel engines equipped according to the Euro VI emissions standard. As independent tests confirm, the engines undercut the prescribed emissions limit values in practical operations, in some cases even drastically.
The basis of the powertrain is the compact and light-weight Mercedes‑Benz OM 936 six-cylinder installed either upright or horizontally. From its 7.7 litre displacement, it delivers an output of 220 kW (299 hp) and torque of 1200 Nm. Upon request, the OM 936 is also available in some Citaro variants with an output of 260 kW and 1400 Nm of torque. If high pulling power is in central focus, the larger Mercedes‑Benz OM 470 with 10.7 litre displacement is the right choice. With 265 kW or 290 kW (360/394 hp) and 1700 Nm or 1900 Nm of torque, the engine is particularly powerful and fulfils the greatest of demands, notably in articulated buses like the spacious CapaCity.
Citaro with gas engine: with biogas or biomethane almost CO2-neutral
The switch-over to electric drive systems in urban buses is a complex topic and requires extensive preparations. Thus, the rapid and comparatively less cost‑intensive option to implement an especially environmentally friendly intermediate technology is the Mercedes‑Benz Citaro NGT hybrid with natural‑gas drive. Gas engines emit almost no particulate matter and NOx emissions are also very low. When used in conjunction with biogas or biomethane, the Citaro NGT hybrid is almost Co2-neutral. The Mercedes-Benz M 936 G with its 7.7 litres of displacement is based on the OM 936 diesel engine. With 222 kW (302 hp) of output and 1200 Nm of torque, its performance is on a par with the diesel engine. The Citaro NGT is available both as a solobus and an articulated bus. The gas bottles of the Citaro NGT are made of light-weight yet highly resistant composite material and are installed on the roof.
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SOURCE: Daimler
