Volvo Excavator Could Improve Fuel Efficiency by 17 Percent

摘要

Volvo is testing a hybrid excavator that harvests "free" energy generated by the down motion of the excavator's boom, using it to supercharge the hydraulic system. The EC330E's boom-down motions charge 20-liter hydraulic accumulators, which then deliver energy to drive hydraulic assist motors that help power the hydraulic pump, Volvo says. This level of controllability and performance, also offered on the standard EC300E, includes the ability to work in ECO mode and Hybrid mode simultaneously.