HYDRAULIC ENERGY RECOVERY SYSTEM

摘要

The invention relates to a hydraulic energy recovery system. The system includes a hydraulic valve (30) comprising a feed channel (VA), an exhaust channel (VE), a low-pressure connecting channel (VB) and a high-pressure connecting channel (VH) which are respectively connected to the feed and exhaust pipes (12, 14) of a hydraulic motor (10), to a low-pressure fluid source (16) and a high-pressure accumulator (20), as well as an auxiliary channel (VX). The valve is provided with a slide (36) which can occupy a neutral position in order to connect the feed, exhaust and auxiliary channels (VA, VE, VX), an energy recovery position in order to connect respectively the feed channel and the low-pressure channel (VA, VB) and the exhaust channel and the high-pressure channel (VE, VH), and an energy release position in order to connect respectively the feed channel and the high-pressure channel (VA, VH) and the exhaust channel and the low-pressure channel (VB). The slide is moved from the neutral position to the other positions by means of control signals (L44, L46) and the auxiliary channel can be connected to a tank (R) or to a clutch fluid source (24) in order to engage or disengage the clutch of the motor.