The new generation of BlueEfficiency Power engines and the transition to the Euro VI emissions standard are the focus of the Mercedes‑Benz Integro in 2013. Considerably lower fuel consumption and further reduced exhaust emissions are the result.
BlueEfficiency Power: two engines, four output variants
The Euro-VI-compliant Blue Efficiency Power engines of the Integro are vertically installed in-line six-cylinder engines. The new, particularly compact Mercedes‑Benz OM 936 series with 7.7 l displacement is used in the two-axle vehicles. The output amounts to 220 kW (299 hp) or 260 kW (354 hp), both at 2200 rpm. Torque is 1200 or 1400 Nm respectively.
The equally new Mercedes‑Benz OM 470 with 10.7 l displacement is used in the three-axle vehicles. Its output is either 265 kW (360 hp) or 290 kW (394 hp) at 1800 rpm. Maximum torque is 1700 Nm or 1900 Nm.
Both engines boast common-rail injection. The injection pressure is generated via a high-pressure pump for the OM 936 or by the X-PULSE injection system for the OM 470 with a pressure booster in the injector.
Strong response, low weight, reduced fuel consumption
The new engines are characterised by high torque at extremely low engine speeds, a spontaneous response and a very smooth running performance. They also excel with a very favourable weight. Despite the additional assemblies required in order to comply with Euro VI, weight has been optimised and reduced with numerous individual measures and is even lower than that of the Euro V predecessor model.
The efficiency of the engines is outstanding: depending on the usage profile and the drive train combination, the fuel consumption of two-axle vehicles is 2-5 % lower than that of predecessors whilst it is up to 2 % lower for three-axle vehicles. The consumption of AdBlue and engine oil is also considerably lower. Not only the new engines, but also the optimised auxiliary equipment such as the regulated generators and the efficient air compressor have contributed to the low fuel consumption of the Integro.
Complex emission control system compliant with Euro VI
The strict regulations for the coming Euro VI emissions standard require a complex emission control system. For this reason Mercedes‑Benz has combined the well-established BlueTec engine technology with SCR technology and AdBlue injection with exhaust gas recirculation as well as a particle filter.
Fast, comfortable, easy-to-operate: the GO 250-8 PowerShift transmission
Mercedes‑Benz also offers the Integro with the eight-speed GO 250-8 PowerShift bus transmission as an alternative to the six-speed manual transmission and the ZF EcoLife automatic transmission with torque converter. Drivers profit from the progressive synchronisation of the transmission as well as from gearshifts which are as fast as they are comfortable. The operation of the transmission via the joystick gear lever is extremely simple. Almost wear and maintenance-free, the clutch is also new to this transmission. A centrically located, pneumatically operated clutch cylinder renders mechanical parts such as the clutch release fork, clutch release bearing and the servo assistance unnecessary.
A powerful yet lightweight retarder
The driver operates the new integrated retarder as usual via the steering column switch. It achieves a braking torque of up to 3500 Nm. The retarder is designed as a secondary retarder and uses the engine coolant as its brake fluid and coolant. This eliminates the previous oil/water heat exchanger and the associated oil changes for the retarder.
Striking design of rear-end for the Euro VI variants
The dynamic design of the rear-end of the Euro VI variant with its newly designed engine compartment flap is striking and distinctive. It is closely related to the Travego Edition 1, the touring coach flagship of Mercedes‑Benz. The symmetric form conceals the completely new design of the cooling and ventilation system for the engine. The position of the radiator behind a bulkhead on the right-hand side together with the ventilation is also an important element.
The specialist for inter-city journeys and excursions
The Integro’s proven agenda remains unchanged: consistently tailored to inter-city travel, this two-door specialist with three variants on two axles (Integro, Integro M) or three axles (Integro L), measuring between 12.14 m and 14.92 m in length covers everything from short regular-service routes in suburban traffic to long-distance inter-city travel. Its comfortable design makes it perfect both for shuttle services and excursions. Thanks to this successful combination of comfort and efficiency and its flexibility with regard to use, the Integro is a double-earner and therefore particularly economic.
Source: Daimler AG