Facing the environment problems, the improvement on the efficiency of the construction
machinery such as the excavator and wheel loader is highly demanded. The hybrid power …

Facing severe environmental problems, to improve the efficiency of the hydraulic
construction machinery is in great demand. The potential energy when the boom is lowering …

This paper deals with the method of how to regenerate the potential energy for a hybrid
hydraulic excavator (HHE). After studying the structure and working cycle of the HHE, two …

Energy regeneration systems (ERSs) that use the same energy storage device as hybrid
power systems can improve the fuel economies of hybrid hydraulic excavators (HHEs) …

Potential energy recovery (ER) is an effective way to reduce energy consumption of hybrid
hydraulic excavators; however, the ER system with a direct speed-control strategy is prone …

Energy efficiency has become a major research issue in all fields of engineering.
Opportunities of utilizing electric servo drives in the control of hydraulic lifting systems …

Mobile hydraulic systems are developed toward better control performance and higher
energy efficiency. Pressure compensators, which govern the pressure drops over the control …

The development of electro-mobility is one of the centerpieces of European country attempts
to reduce carbon emissions and increase the quality of life in cities. The goals of reducing …

A hydraulic cylinder driven scheme combining a pressure compensator and an energy
recovery device together has been proposed to achieve good control operation and energy …

Though the traditional energy regeneration system (ERS) which used a hydraulic motor and
a generator in hybrid excavators can regenerate part of the energy, the power of the motor …