Bauma 2022 innovations: Sustainable solutions from Hamm

For many years now, Hamm has been developing efficient machines that steadily reduce fuel consumption. In an effort to make construction site operations more resource-efficient, the ECO mode and the Power Hybrid roller in the HD+ series, for example, marked milestones. With eight electrified tandem rollers in the HD CompactLine Hamm is now entering the segment for fully electrical construction machines.

Electrified HD CompactLine compacts with zero local emissions

The proportion of projects for which clients are demanding low-emission or zero-emission construction machinery is increasing worldwide. With the new fully electric tandem rollers in the HD CompactLine series from Hamm, construction companies can meet this requirement. This is ensured by a maintenance-free Li-ion battery with a capacity of approx. 23 kWh and optimal energy yield. Another advantage: The new electrified tandem rollers hold no surprises for users; their operation is identical to diesel-powered models. The compaction power is also at the same level.

Power Hybrid drive reduces CO₂ and decibels

With the 9 t HD+ 90i PH tandem roller, Hamm has been offering a tandem roller with Power Hybrid drive from as far back as 2016, meaning that Hamm was the first provider in this segment to develop a hybrid technology and bring it to market maturity. This significantly reduces fuel consumption by approx. 15% – without compromising on compaction power. How it works: While the diesel engine provides the base load, the hydraulic accumulator covers the peak loads, such as start-up or activation of vibration or oscillation, by providing an additional 20 kW for a short time. After this maximal load has been generated, the hydraulic accumulator is recharged via a pump.

Optimized diesel engines increase efficiency

In the current series with diesel engines, Hamm has continuously optimized the power train and designed it for operation at reduced speeds. As a result, operators save fuel every day. Most of the Hamm rollers that are currently on the market can be run as an admixture or entirely with alternative fuels, such as Hydrotreated Vegetable Oil (HVO).