DUTCH GAS-BUS PUSH GREENLIGHTS DAIMLER HYBRID OPTION

Photography by: courtesy Daimler


ROTTERDAM – THE HAGUE metropolitan area will have 93 Mercedes-Benz Citaro NGT hybrid low-floor urban buses in operation by the end of August, 2019, operated via public transport company EBS in the Netherlands, according to Daimler Europe, recently.

DUTCH GAS-BUS PUSH GREENLIGHTS DAIMLER HYBRID OPTION
When used in conjunction with biogas or biomethane, the Citaro NGT hybrid is almost CO2 neutral, Daimler explains.

In terms of the numbers breakdown, the fleet is made up of 83 Citaro NGT hybrid solo buses and 10 Citaro G NGT hybrid articulated buses. Commonly, they use a gas-powered engine with a hybrid module combination, explains Daimler.

The Egged Bus Systems (EBS) company is located in the town of Purmerend, north of Amsterdam, and operates several bus routes in the Netherlands. In addition to the gas-powered engine, hybrid module and the ZF Ecolife automatic transmission, the urban buses are equipped with electrohydraulic intelligent eco steering - a recuperation module for recuperating electric power - and LED headlamps, says Daimler.

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There’s an air-conditioned passenger compartment, comfortable Inter Star Eco overland seats with particularly high backrests, and 29-inch ‘infotainment’ TFT screens (two on the solo buses or three on articulated buses). Passengers can charge their own mobile devices using numerous USB ports, while the striking red vehicle floor - as well as the grab rails and ceiling hand rails - also convey a feeling of safety to visually impaired passengers, the company states.

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THE HYBRID MODULE

The combination of a gas-powered engine with a hybrid module is a unique selling point for the Citaro NGT hybrid in Europe, says Daimler. The Mercedes-Benz M 936 G gas-powered engine delivers 22kW (302hp) from 7.7-litre displacement and achieves a maximum torque of 1200Nm, it claims. When used in conjunction with biogas or biomethane, the Citaro NGT hybrid is almost CO2 neutral, Daimler explains. 

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The electric motor of the hybrid module supports the gas-powered engine primarily when the vehicle pulls away and the demand for power is high with an output of up to 14kW and 220Nm. The ability to provide for this maximum demand in power reduces fuel consumption, which is already low, by up to 8.5 per cent, says Daimler. Accordingly, emissions are lower, it adds.

The use of the hybrid module also further reduces the low noise levels of the natural-gas engine when pulling away, Daimler states. The power for the electric motor is recuperated during braking and overrun phases at no cost, plus it is stored in double-layer capacitors – so-called ‘supercaps’.

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