EP 3748168 B1 20231011 - HYDRAULIC DRIVE SYSTEM WITH TWO PUMPS AND ENERGY RECOVERY
Title (en)
HYDRAULIC DRIVE SYSTEM WITH TWO PUMPS AND ENERGY RECOVERY
Title (de)
HYDRAULISCHES ANTRIEBSSYSTEM MIT ZWEI PUMPEN UND ENERGIERÜCKGEWINNUNG
Title (fr)
SYSTÈME D'ENTRAÎNEMENT HYDRAULIQUE À DEUX POMPES ET À RÉCUPÉRATION D'ÉNERGIE
Publication
Application
Priority
DE 102019208086 A 20190604
Abstract (en)
[origin: CN112032126A] The invention relates to a hydraulic drive system (10, 10) having at least one first actuator (20), a tank (13), a first check valve (43) and first and second pumps (40, 50), wherein the first pump (40) has a constant displacement volume and the second pump (50) has an adjustable displacement volume; a first fluid flow path extends from the tank (13), via the first pump (40), further via a first control point (11), further via the first check valve (43), to a second control point (12), and at least one first actuator (20) is fluidically connected to the second control point (12); a pressure fluid can be conducted from the first control point (11) to the tank (13) via an adjustable first diaphragm (41), and the first diaphragm (41) is subjected to a pressure on the first control point (11)in the opening direction. According to the invention, the first diaphragm (41) is acted upon by a settable predefined control force (44) in the closing direction, which control force is independent ofa separate load pressure (23) acting in the at least one first actuator (20).
IPC 8 full level
F15B 11/17 (2006.01)
CPC (source: CN EP)
E02F 9/2235 (2013.01 - EP); E02F 9/2242 (2013.01 - EP); E02F 9/2292 (2013.01 - EP); E02F 9/2296 (2013.01 - EP); F15B 11/17 (2013.01 - CN EP); F15B 21/14 (2013.01 - CN); F15B 11/165 (2013.01 - EP); F15B 2211/20538 (2013.01 - EP); F15B 2211/20546 (2013.01 - EP); F15B 2211/20569 (2013.01 - EP); F15B 2211/20576 (2013.01 - EP); F15B 2211/2656 (2013.01 - EP); F15B 2211/30505 (2013.01 - EP); F15B 2211/4053 (2013.01 - EP); F15B 2211/41509 (2013.01 - EP); F15B 2211/41518 (2013.01 - EP); F15B 2211/428 (2013.01 - EP); F15B 2211/50536 (2013.01 - EP); F15B 2211/5157 (2013.01 - EP); F15B 2211/522 (2013.01 - EP); F15B 2211/528 (2013.01 - EP); F15B 2211/6309 (2013.01 - EP); F15B 2211/6313 (2013.01 - EP); F15B 2211/6333 (2013.01 - EP); F15B 2211/6652 (2013.01 - EP); F15B 2211/71 (2013.01 - EP)
Citation (examination)
DE 102015216737 A1 20170302 - BOSCH GMBH ROBERT [DE]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3748168 A1 20201209; EP 3748168 B1 20231011; CN 112032126 A 20201204; DE 102019208086 A1 20201210
DOCDB simple family (application)
EP 20173200 A 20200506; CN 202010494586 A 20200603; DE 102019208086 A 20190604