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English   Solaris Presents Second Generation of Hybrid Buses
21.08.2008 von admin



20-30% less fuel thanks to smaller engine and reduced weight

The main new feature of the second generation of the Solaris Urbino 18 Hybrid is the choice of a smaller diesel engine. The hybrid bus now uses the 178 kW (242 PS) Cummins ISBe5 250B engine. At 6.7 l capacity, it produces 1005 Nm torque and meets the demanding Euro 5 emissions standard.

The hybrid system continues to be the Ep system developed by Allison Transmission. At 2×75 kW, its electric engines provide the same power as in the first generation of the Solaris hybrid bus. However, the system has been further optimised to match the performance of the new diesel engine. As before, energy recuperated from braking is stored in roof-mounted nickel-metal hydride batteries.


"Thanks to the use of a smaller diesel engine and reduced overall weight, we are able to achieve a fuel consumption that is lower than ever before. The first generation of the Solaris Urbino 18 Hybrid used about 15% less diesel. With the second generation, we expect to use between 20% and 30% less fuel than comparable diesel buses. The first tests by the TÜV SÜD group confirm this trend," said Krzysztof Olszewski about the new drive train.

The tests were carried out by Prague-based TÜV SÜD Auto CZ s.r.o. and showed that compared to a Solaris Urbino 18 with a conventional diesel engine, the second-generation hybrid bus uses 23.8% less fuel in the SORT1 cycle. Savings in SORT2 are 23.4% and in SORT3 22.9% less fuel is consumed. "Further optimisation means we will surpass these savings in the future," said Krzysztof Olszewski. "However, the most important fact is that a lower fuel consumption means lower emissions and less of a strain on the environment. A quarter less diesel means a quarter less CO2, nitrogen oxides and particulate matter."

In the second-generation Solaris Urbino 18 Hybrid, the drive train is located at the rear of the bus as on the standard diesel version. The engine is mounted vertically, while the hybrid unit takes the place of a conventional automatic gearbox. Power is transmitted to the rear axle.

With further components of the hybrid system such as batteries and the Dual Power Inverter Module placed on the roof, the saloon layout is the same as on the conventional diesel version of the Urbino 18. Operators of Solaris hybrid buses benefit from flexible options for saloon layouts, while passengers enjoy a familiar travelling environment. Thanks to jolt-free acceleration and comfortable driving dynamics of the hybrid bus, passengers cannot fail to notice the state-of-the-art technology of the Solaris Urbino 18 Hybrid.


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