The Power Hybrid concept at a glance:
HAMM currently offers the hybrid drive for the 9 tonne HD+ 90i PH tandem roller (EPA Tier 4/EU Stage V) in a range of variants (VV, VV-S, VO, VO-S, VT, VT-S). For these models, HAMM combines a classic combustion engine with a hydraulic accumulator. While the diesel unit provides the basic load, the hydraulic accumulator is able to cover peak loads, such as start-up or activating vibration/oscillation, by providing an additional 20 kW of power at short notice. After this maximal load has been generated, the hydraulic accumulator is recharged via a pump. Since the maximum load is generally only required for a few seconds, sufficient recharge time is available. Additionally, the diesel engine's workload is reduced by an electric fan drive with optimum efficiency and an efficient start-stop system. This means that an engine that provides 55.4 kW of power is sufficient in the HD+ 90i PH instead of the 85 kW unit in the standard HD+ 90i model.