DaimlerChrysler’s Mercedes-Benz Bus and Coach Unit has delivered the first seven Citaro urban regular-service buses equipped with Euro 5-compliant turbodiesel engines.
The Euro-5 emissions standard is due to come into force in the EU in 2008/2009; full enforcement for Euro-4 standards begins this October. Euro 5 stipulates a further 43% reduction in NOx emissions over Euro 4.
Seven coaches went to transport operator Verkehrsgesellschaft Breitenbach GmbH & Co. KG based in Hamm, Germany. One went to Dutch transport operator RET (Rotterdamse Elektrische Tram) as the first part of a consignment totalling 90 Citaro urban buses which will be going into service in Rotterdam from August 2006.
The Citaro buses use DaimlerChrysler’s BlueTec technology based on urea-based Selective Catalytic Reduction (SCR), combined with the installation of a larger sintered-metal particulate filter. The engines develop 205 kW (279 hp) of power and offer peak torque of peak torque of 1,120 Nm (826 lb-ft) at 1,300 rpm.
To make the Mercedes-Benz Citaro urban buses Euro 5-compatible, the developers increased the size of the SCR catalytic converter and adjusted the urea (Ad-Blue) injection quantity.