HYDRAULIC CIRCUIT FOR A ENERGY REGENERATIVE DRIVE SYSTEM

摘要

A circuit (200) for a regenerative drive system including a motor/pump apparatus (10) coupled to an accumulator (12) via a primary valve device (203). The valve (203) includes parallel valves (204, 205) via which hydraulic fluid under pressure from the apparatus (10) is delivered to the accumulator (12). When the apparatus (10) is operate as a motor, the valves (204, 205) are opened providing for flow from the accumulator (12) to the apparatus (10). Opening of the valves (204, 205) is governed so as to minimize shock loading the apparatus (10).