公开(公告)号：EP4119731B1

公开(公告)日：2024-09-11

申请号：EP22184195.0

申请日：2022-07-11

IPC分类号： E02F9/22 ,  E02F9/20 ,  F15B7/00

CPC分类号： E02F9/2282 ,  E02F9/207 ,  E02F9/2228 ,  F15B2211/2051520130101 ,  F15B2211/2053820130101 ,  F15B2211/665120130101 ,  F15B2211/311620130101 ,  F15B2211/5051820130101 ,  F15B2211/55520130101 ,  F15B2211/4520130101 ,  F15B2211/32720130101 ,  F15B2211/630920130101 ,  F15B2211/32920130101 ,  F15B2211/8820130101 ,  F15B2211/5055420130101 ,  F15B2211/635520130101 ,  F15B2211/634620130101 ,  F15B21/087 ,  F15B2211/515620130101

公开(公告)号：EP3779212B1

公开(公告)日：2024-08-28

申请号：EP19778403.6

申请日：2019-03-06

IPC分类号： F15B11/08 ,  E02F9/22 ,  F15B11/00 ,  F15B11/02 ,  F15B11/17

CPC分类号： F15B11/166 ,  F15B2211/5055420130101 ,  F15B2211/35520130101 ,  F15B2211/32920130101 ,  F15B2211/635520130101 ,  F15B2211/3059520130101 ,  F15B2211/713520130101 ,  F15B2211/714220130101 ,  F15B2211/705320130101 ,  F15B2211/705820130101 ,  F15B2211/631620130101 ,  E02F3/425 ,  E02F9/2235 ,  E02F9/2242 ,  E02F9/2285 ,  E02F9/2282 ,  E02F9/2228 ,  F15B2211/57520130101 ,  F15B2211/52620130101 ,  F15B2211/665320130101 ,  F15B2211/3620130101 ,  F15B11/167 ,  F15B2211/7820130101 ,  F15B2211/2057620130101 ,  F15B2211/2054620130101

公开(公告)号：EP4151804B1

公开(公告)日：2024-06-19

申请号：EP22196590.8

申请日：2022-09-20

IPC分类号： E02F9/22

CPC分类号： E02F9/2242 ,  E02F9/2228 ,  E02F9/2282 ,  F15B2211/713520130101 ,  F15B2211/78120130101 ,  F15B2211/405320130101 ,  F15B2211/2057620130101 ,  F15B2211/714220130101 ,  F15B11/17 ,  F15B2211/42820130101 ,  F15B11/162

公开(公告)号：EP3940151B1

公开(公告)日：2024-04-24

申请号：EP20768921.7

申请日：2020-03-11

IPC分类号： E02F9/20 ,  E02F9/22 ,  F15B11/00

CPC分类号： E02F9/2235 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/205 ,  F15B2211/2052320130101 ,  F15B2211/2054620130101 ,  F15B2211/4520130101 ,  F15B2211/630620130101 ,  F15B2211/665220130101 ,  F15B2211/665420130101 ,  F15B2211/634620130101 ,  F15B2211/85120130101 ,  F15B2211/860620130101

公开(公告)号：EP2672022B1

公开(公告)日：2018-12-26

申请号：EP13169925.8

申请日：2013-05-30

申请人： CNH Industrial Italia S.p.A.

发明人： Hennemann, Matthew J. ,  Lech, Richard J.

IPC分类号： E02F3/96 ,  E02F9/22 ,  F04B49/00 ,  F15B13/04 ,  F04B49/08 ,  F04B49/12

CPC分类号： E02F3/964 ,  E02F9/2232 ,  E02F9/2282 ,  E02F9/2296 ,  F04B49/002 ,  F04B49/08 ,  F04B49/12 ,  F15B13/0416 ,  F15B2211/605 ,  F15B2211/6051 ,  F15B2211/6057 ,  F15B2211/65

摘要： A fluid control system (50) including a variable displacement pump (52) having a load system control (54) and configured to operate in an open center mode. A pump control (56) is operable between a first arrangement (58) and a second arrangement (60). The pump control (56) receives pressurized fluid from a first load sensor pressure in fluid communication with the pump (52) and an actuator return pressure in fluid communication with an actuator (22, 26) configured to operate using pressurized fluid from the system (50), the pump control (56) providing a selective pump control pressure to the pump load system control (54). When the system (50) is operating in a standby mode, the pump (52) operates in a first minimized displacement condition. When the system (50) is in a stall mode, the pump (52) operates in a second minimized displacement condition.

公开(公告)号：EP2660395B1

公开(公告)日：2018-12-12

申请号：EP11852371.1

申请日：2011-12-27

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： OTA Yasunori ,  IWASAKI Satoshi

IPC分类号： E02F9/20 ,  B60K11/04 ,  B60L11/14 ,  F01P7/16 ,  H02K9/02 ,  B60K11/02

CPC分类号： E02F9/2058 ,  B60K11/02 ,  B60K2001/005 ,  B60K2001/006 ,  B60K2025/026 ,  B60L1/003 ,  B60L1/02 ,  B60L3/003 ,  B60L3/0061 ,  B60L11/005 ,  B60L11/14 ,  B60L11/1874 ,  B60L2200/40 ,  B60L2210/40 ,  B60L2240/36 ,  B60L2240/425 ,  B60L2240/445 ,  B60L2240/525 ,  B60L2240/545 ,  B60Y2200/412 ,  E02F9/128 ,  E02F9/2075 ,  E02F9/2091 ,  E02F9/2217 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/26 ,  F01P3/20 ,  F01P2050/24 ,  Y02T10/642 ,  Y02T10/70 ,  Y02T10/7005 ,  Y02T10/7022 ,  Y02T10/705 ,  Y02T10/7077 ,  Y02T10/7241

摘要： When temperature is low, a low-temperature mode is selected, followed by the activation of the heating mode functionality 25a of a PCU 25. Specifically, the PCU 25 sets the ratio of energy recovered by a capacitor 23 to be equal to or greater than the largest value of the energy recovery ratios of the capacitor 23 in a normal mode (e.g., assist motor 22 : capacitor 23 = 2 : 8). Thus, more energy is stored on the capacitor 23 than in the normal mode, helping the capacitor 23 generates heat. As a result, the liquid temperature of the coolant is increased, and its viscosity is reduced accordingly. As above, the invention provides a simple cooling system to be mounted on a hybrid working machine, which is capable of preventing decreases in energy efficiency at low temperature.

公开(公告)号：EP2685011B1

公开(公告)日：2018-08-22

申请号：EP12755504.3

申请日：2012-03-06

申请人： Sumitomo (S.H.I.) Construction Machinery Co., Ltd.

发明人： MAGAKI, Hideto ,  SHIRATANI, Ryuji

IPC分类号： E02F9/22 ,  E02F3/43 ,  F15B11/00 ,  E02F9/20 ,  E02F9/26

CPC分类号： E02F9/2203 ,  E02F3/435 ,  E02F9/2033 ,  E02F9/2075 ,  E02F9/2214 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/265

摘要： A shovel includes a boom 4 or an arm 5 driven by a hydraulic oil discharged from a main pump 12. The shovel also includes a pressure sensor 17A which detects an operating condition of the boom 4, an arm angle sensor S1 which detects an arm angle ², a body stability determining part 300 which determines a body stability degree of the shovel based on the arm angle ² and an operating condition of the boom 4, and a discharge rate controlling part 301 which decreases a horsepower of the main pump 12 if it is determined by the body stability determining part that a body stability degree becomes lower than or equal to a predetermined level.

公开(公告)号：EP2863065B1

公开(公告)日：2018-07-25

申请号：EP13803591.0

申请日：2013-03-06

申请人： Sumitomo (S.H.I.) Construction Machinery Co., Ltd.

发明人： HASHIMOTO, Hirofumi

IPC分类号： F15B11/00 ,  F15B11/02 ,  F15B11/16 ,  E02F9/22

CPC分类号： F15B11/10 ,  E02F9/2242 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/162 ,  F15B13/0402 ,  F15B2211/20576 ,  F15B2211/3052 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/30565 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/31582 ,  F15B2211/35 ,  F15B2211/40507 ,  F15B2211/41509 ,  F15B2211/41554 ,  F15B2211/45 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/78 ,  F15B2211/781

摘要： A hydraulic circuit for a construction machine including a direction control valve group having multiple direction control valves that are provided in tandem to a center bypass passage of the construction machine, a bleed-off valve provided to the center bypass passage downstream of the direction control valve group, and a control valve that controls an amount of pressure oil to be supplied to the direction control valve. The direction control valve includes a first internal passage that flows out the pressure oil supplied to the direction control valve to the center bypass passage, and a second internal passage that supplies the pressure oil to a hydraulic actuator of the construction machine. The first internal passage causes pressure oil discharged from the hydraulic pump to flow out to the center bypass passage downstream of the direction control valve, so that the center bypass passage and the first internal passage form a parallel passage. The bleed-off valve performs bleed-off control on pressure oil supplied by way of the parallel passage by changing an opening area of the bleed-off valve. The control valve controls the amount of the pressure oil to be supplied to the second internal passage by changing an opening degree of the control valve.

公开(公告)号：EP2955286B1

公开(公告)日：2018-04-04

申请号：EP15169537.6

申请日：2015-05-28

申请人： Kobelco Construction Machinery Co., Ltd.

发明人： UEDA, Koji ,  IZUKA, Takaaki

IPC分类号： E02F9/22 ,  F15B21/14

CPC分类号： E02F9/2203 ,  E02F9/2217 ,  E02F9/226 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/3116 ,  F15B2211/611 ,  F15B2211/62

摘要： A construction machine is provided which is capable of warming up without an additional hydraulic device. A hydraulic excavator 1 includes a cooling oil line R4 connected to an arm control valve 14 for leading hydraulic oil discharged from the arm control valve 14 to a tank 15 through an oil cooler 17 when the arm control valve 14 is shifted to an extension position, and a non-cooling oil line R11 connected to the arm control valve 14 for leading hydraulic fluid discharged from the arm control valve 14 to the tank 15 running away from the oil cooler 17 when the arm control valve 14 is shifted to a neutral position. The arm control valve 14 includes a guide passage 14a provided at the neutral position for leading hydraulic fluid discharged from a hydraulic pump 12 to the non-cooling oil line R11.

公开(公告)号：EP2532792A4

公开(公告)日：2018-03-28

申请号：EP11739783

申请日：2011-02-02

申请人： HITACHI CONSTRUCTION MACH CO

发明人： OKANO YASUO ,  NAKAMURA TSUYOSHI ,  ISHIKAWA KOUJI

IPC分类号： E02F9/22 ,  F15B11/00 ,  F15B11/17

CPC分类号： E02F9/2235 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/2654 ,  F15B2211/3116 ,  F15B2211/6309 ,  F15B2211/6313

摘要： During a swing start, a pump torque calculating section associated with pump delivery pressure 43, a pump torque calculating section associated with swing operation pressure 44, and a maximum value selecting section 45 of a controller 38 performs control to change a maximum absorption torque of a second hydraulic pump 3 between Tb and Tc in accordance with a delivery pressure of the second hydraulic pump 3. In a combined swing operation combining swing with other motion, a subtraction section 47 performs a calculation to subtract a maximum absorption torque Tp2 of the second hydraulic pump 3 from a total pump torque Tr0 and control to thereby distribute an amount of torque reduced in the second hydraulic pump 3 to a first hydraulic pump 2 associated with an actuator other than a swing motor 7. An energy loss due to relief during the swing start can thereby be reduced to improve energy efficiency. Further, a required flow rate can be supplied to the swing motor during a process of transiting to a constant speed following the swing start, thus achieving a smooth shift to a constant speed swing. Improved combined work operability and work efficiency can therefore be achieved.