Volvo Buses will soon be launching its new hybrid bus in Europe, the Volvo 7700 Hybrid is scheduled for introduction coming September. Volvo claims its hybrid technology generates a fuel saving of up to 30%. Volvo Buses’ launch of its hybrid bus this autumn signals a generation shift. With a hybrid solution that is largely based on standard products and with fuel savings of 20-30%, customers will relatively quickly earn payback on the extra cost for the bus. The technology also lowers the exhaust emissions and noise levels substantially.
The Volvo 7700 is the first hybrid model to roll out. It is a 12-meter low-floor city bus. Volvo Buses has chosen to develop a parallel hybrid where all components are Volvo components. The bus has a smaller, 5-liter diesel engine and as a result, the entire driveline fits in the same space as in a diesel-powered Volvo 7700. The bus is a parallel hybrid featuring diesel and electric power that can operate independently of the other. The electric motor is used to start and accelerate the bus up to about 20 km/h, enabling considerable fuel savings. At higher speeds, the diesel engine takes over, while also recharging the batteries. The electric motor serves both as a motor and a generator. When the brakes are applied, the retardation energy is transmitted to charge the batteries.
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