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1. (WO2018167135) HYDRAULIC CONTROL CIRCUIT WITH FLOW SUMMATION IN PRESENCE OF SINGLE OR DOUBLE EFFECT AUXILIARY EQUIPMENTS OF A CONSTRUCTION VEHICLE

Pub. No.:    WO/2018/167135    International Application No.:    PCT/EP2018/056367
Publication Date: Fri Sep 21 01:59:59 CEST 2018 International Filing Date: Thu Mar 15 00:59:59 CET 2018
IPC: B25D 9/14
F15B 11/16
E02F 9/22
F15B 11/17
Applicants: CNH INDUSTRIAL ITALIA S.P.A.
CNH INDUSTRIAL AMERICA LLC
CNH (CHINA) MANAGEMENT CO., LTD
Inventors: CHIOCCOLA, Francesco
Title: HYDRAULIC CONTROL CIRCUIT WITH FLOW SUMMATION IN PRESENCE OF SINGLE OR DOUBLE EFFECT AUXILIARY EQUIPMENTS OF A CONSTRUCTION VEHICLE
Abstract:
A hydraulic power control circuit for a construction vehicle, having a control section comprising: A first control valve (1) connectable to a source of hydraulic fluid under pressure (P1, P2, LSP) to control a power actuator (B) of the vehicle; A second control valve (2) connectable to the source of hydraulic fluid under pressure (P1, P2, LSP) to control a hydraulic auxiliary equipment (C, H) via a first line (L1) associated to a first effect of the equipment (C, H), the equipment being either a single effect equipment (H) or a double effect equipment (C); An interconnection (I) downstream of the second control valve (1) so that the first and the second control valves (1, 2) are operable to the source of fluid under pressure (P1, P2) so as to control only one effect of the actuator (B) by a flow-summation; A switch valve (3) intercepting the interconnection (I) and a second line (L2) to control the equipment (C, H) in order to control both a single effect and a double effect equipment.