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1. (WO2018202659) VEHICLE WITH A BOOM COMPRISING A HYDRAULIC CONTROL CIRCUIT WITH A LOAD CONTROL VALVE

Pub. No.:    WO/2018/202659    International Application No.:    PCT/EP2018/061107
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Thu May 03 01:59:59 CEST 2018
IPC: B66F 9/065
B66F 9/22
Applicants: CNH INDUSTRIAL ITALIA S.P.A.
CNH INDUSTRIAL AMERICA LLC
CNH (CHINA) MANAGEMENT CO., LTD
CNH INDUSTRIAL BRASIL LTDA.
Inventors: BENEVELLI, Alessandro
CRISTOFORI, Davide
NOTARNICOLA, Giovanni
Title: VEHICLE WITH A BOOM COMPRISING A HYDRAULIC CONTROL CIRCUIT WITH A LOAD CONTROL VALVE
Abstract:
The vehicle according to the present invention comprises a boom (2) and a control valve MO to lift/lower the boom (2). The vehicle further comprises a control circuit to control the boom lowering speed via a pressure compensator LPC that balances a first pressure signal p_MO downstream of control valve MO during boom lowering and a second pressure signal p_pil from a hydraulic user interface so that, upon increasing of the first pressure signal p_MO during boom lowering, control valve MO progressively closes. The circuit preferably comprises a piloting valve (15) object of a use claim. A retrofit method is disclosed to retrofit an existing vehicle to obtain the features previously discussed.