Hamm saves fuel with load-dependent control
Hamm AG of Germany, part of the Wirtgen Group, is expanding its range of articulated tandem rollers. The new HD+ 70i and HD+ 80i are fitted with engine technology that already meets the EU IV / Tier 4 Final standards, which will come into force in 2014.
Two separately controlled ventilators cool the charge air, hydraulic oil and engine cooling fluid. In doing so, the load-dependent control of the ventilator for engine cooling saves fuel and reduces noise emissions. In addition the rollers are fitted as standard with the Hammtronic engine management system, which Hamm says ensures that the engine is always operated in the right loading range. This optimizes performance and minimizes consumption.