Mobile Machine with Hydrostatic Hybrid Drive Train

Reducing the noxious emissions from internal combustion engines is one of the factors that can contribute to amending the quality of the environment in which we live. Even if the efforts and results of the last decades are more visible in the field of road vehicles, the equipment used in the construction field also registers progress in reducing consumption and especially CO2 emissions. To reduce consumption, equipment manufacturers have applied various hybridization solutions, from the simplest ones that use energy recovery systems to those that use both internal combustion engines and electric motors. A special case is encountered when noxious emissions are completely prohibited, such as work performed in enclosed spaces or which cannot be properly ventilated. In these cases, the only solution is to obtain the necessary energy with an electric motor powered by batteries, in order to drive the transmission and the equipment mounted on the machine. Since hydraulic drive is difficult to replace in machines working in harsh conditions, the hydraulic pumps must be driven by electric motors. The article presents such a machine solution, which uses as the primary source of energy either a regular internal combustion engine or an electric motor powered by batteries.