-
公开(公告)号：US10041509B2
公开(公告)日：2018-08-07
申请号：US15021150
申请日：2014-09-30
申请人： AISIN AW CO., LTD.
摘要： A hydraulic device wherein an orifice is provided upstream of the discharge valve in an oil passage from the electric pump, a drain oil passage from the second hydraulic servo communicates between the orifice and the discharge valve in the oil passage from the electric pump, and an oil pressure in the oil passage upstream of the orifice is maintained at a predetermined pressure higher than the set pressure.
-
公开(公告)号：US20180209121A1
公开(公告)日：2018-07-26
申请号：US15745335
申请日：2016-07-15
发明人： Young Shik CHO , Woo Yong JUNG
CPC分类号： E02F9/22 , E02F9/20 , E02F9/2004 , E02F9/2235 , E02F9/2246 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20576 , F15B2211/6651 , F15B2211/71
摘要： Disclosed are a construction machine and a method of controlling a construction machine. The construction machine includes: a first pump and a second pump; an engine which provides available torque to the first pump and the second pump; a first joystick and a second joystick which control actuators operated by a working fluid discharged from the first pump and the second pump; a joystick operation amount acquiring unit which acquires operation amounts of the first joystick and the second joystick; and a control unit which adjusts a torque distribution ratio with respect to the first pump and the second pump in accordance with the operation amounts of the first joystick and the second joystick when a sum of required torque of the first pump and required torque of the second pump is higher than the available torque.
-
公开(公告)号：US20180172037A1
公开(公告)日：2018-06-21
申请号：US15384423
申请日：2016-12-20
发明人： Sharath CUGATI , Christoper WILLIAMSON , Pengfei MA , Mark VONDERWELL , Sean JOHNSON , James W. FUERST , Jiao ZHANG
CPC分类号： F15B11/162 , E02F3/308 , E02F3/404 , E02F3/425 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20523 , F15B2211/20546 , F15B2211/20576 , F15B2211/3059 , F15B2211/3116 , F15B2211/31535 , F15B2211/6346 , F15B2211/6652 , F15B2211/7135 , F15B2211/7142
摘要： A hydraulic system for a machine includes a plurality of hydraulic component, wherein the hydraulic components include hydraulic actuators and hydraulic motors. The hydraulic system also includes a plurality of hydraulic circuits, and a plurality of hydraulic pumps for supplying hydraulic fluid to the plurality of hydraulic components via the hydraulic circuits. At least one hydraulic component receives hydraulic flow exclusively from a designated one of the hydraulic pumps and at least another, different hydraulic component receives shared hydraulic flow from a flow sharing set of the hydraulic pumps.
-
公开(公告)号：US09976283B2
公开(公告)日：2018-05-22
申请号：US15027016
申请日：2014-11-26
CPC分类号： E02F9/2235 , E02F3/325 , E02F9/2228 , E02F9/2232 , E02F9/2267 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B13/025 , F15B13/026 , F15B13/0803 , F15B20/007 , F15B2211/20523 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/25 , F15B2211/6652 , F15B2211/6655
摘要： It is an object of the present invention to accurately detect the absorption torque of the other of two hydraulic pumps by a purely hydraulic structure and feed the absorption torque to one of the two hydraulic pumps, thereby to accurately perform a total torque control, effectively utilize a rated output torque of a prime mover, and enhance mountability. To achieve the object, there are provided: a torque feedback circuit 31 to which the delivery pressure of a first hydraulic pump 1a and a load sensing drive pressure are introduced, which modifies the delivery pressure of a second hydraulic pump 1b to provide a characteristic simulating the absorption torque of the second hydraulic pump 1b, and which outputs the modified pressure; and torque feedback pistons 32a, 32b to which the output pressure of the torque feedback circuit 31 is introduced, and which control the capacity of the first hydraulic pump 1a to decrease the capacity of the first hydraulic pump 1a and decrease a maximum torque T1max as the output pressure becomes higher. The torque feedback circuit 31 includes pressure dividing restrictor parts 34a, 34b, pressure dividing valves 35a, 35b, and relief valves 37a, 37b.
-
公开(公告)号：US20180073525A1
公开(公告)日：2018-03-15
申请号：US15563631
申请日：2015-04-03
CPC分类号： F15B11/17 , E02F9/2221 , E02F9/2235 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B2211/20576 , F15B2211/2654 , F15B2211/30595 , F15B2211/6346 , F15B2211/6652 , F15B2211/6654 , F15B2211/7142 , F15B2211/75
摘要： To provide a hydraulic control system for a working machine with high fuel efficiency and higher versatility to be capable of being adapted to special work. The hydraulic control system for the working machine according to the present invention includes: a plurality of directional control valves (31, 32, . . . ), more than one of which is connected in parallel to each of a plurality of hydraulic pumps (11, 12, 13) to supply hydraulic oil from the hydraulic pump to each of the corresponding actuators (4, 5, 6, 50); operating devices (110, 120, 130, 140) to which an operator inputs manipulated variables; a connection map (182) storing a precedence order for connection between a plurality of hydraulic pumps and a plurality of directional control valves; and a controller (100) controlling the connection conditions of the pumps and the actuators on the basis of the connection a¥map and operation signals.
-
公开(公告)号：US09915108B1
公开(公告)日：2018-03-13
申请号：US15084349
申请日：2016-03-29
申请人： Larry G. Keast
发明人： Larry G. Keast
CPC分类号： E21B19/06 , E21B3/02 , F15B11/17 , F15B15/1428 , F15B15/20 , F15B2211/20592 , F15B2211/252
摘要： A dual control hydraulic circuit for a tilting power swivel having a main hydraulic pump providing an operational supply of hydraulic fluid causing a clockwise or counter clockwise rotation of the tilting power swivel. A hydraulic cylinder used to hydraulically power an angular change between a bail and a body, wherein a local control valve can enable extension and retraction of a rod of the hydraulic cylinder. An auxiliary hydraulic pump providing hydraulic fluid at a low pressure, a hydraulic reservoir fluidly connected to the main hydraulic pump and the auxiliary hydraulic pump, an engine connected to the main hydraulic pump, and a hydraulic fluid return line from a local control valve to the hydraulic reservoir used for dual control for operating the hydraulic cylinder to tilt the tilting power swivel and a remote control connected to the local control valve for controlling the local control valve.
-
公开(公告)号：US09915056B2
公开(公告)日：2018-03-13
申请号：US14646193
申请日：2013-11-19
发明人： Shinichiro Tanaka , Hiroyasu Kodera
CPC分类号： E02F9/2242 , E02F9/225 , E02F9/226 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B1/00 , F15B11/02 , F15B11/17 , F15B2211/20523 , F15B2211/20538 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/30595 , F15B2211/633 , F15B2211/6343 , F15B2211/6346 , F15B2211/7135 , F15B2211/7142 , F15B2211/781
摘要： In a hydraulic drive system, hydraulic oil discharged from an actuator pump is supplied to an actuator via an actuator drive circuit. In the hydraulic drive system, the hydraulic oil discharged from a fan pump is supplied to a cooling fan motor via a fan drive circuit, and the cooling fan motor rotates a cooling fan at a rotational speed corresponding to the flow rate of the hydraulic oil supplied to the cooling fan motor. A merge circuit connects the actuator drive circuit and the fan drive circuit to each other to cause the hydraulic oil flowing through the actuator drive circuit to merge into the hydraulic oil flowing through the fan drive circuit. When the merge condition is satisfied, the controller controls the merge circuit to connect the actuator drive circuit and the fan drive circuit to each other.
-
公开(公告)号：US09903094B2
公开(公告)日：2018-02-27
申请号：US14915344
申请日：2014-11-07
发明人： Hiromasa Takahashi
CPC分类号： E02F3/435 , E02F9/2207 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20561 , F15B2211/20569 , F15B2211/20576 , F15B2211/27 , F15B2211/30595 , F15B2211/71
摘要： Provided is a work machine driving device which can reduce unnecessary switching control of switching valves. The present invention is configured so that at least two closed-circuit hydraulic pumps 2a to 2f can be connected in a closed loop to any one of hydraulic actuators 7a to 7c, 10c through electromagnetic switching valves 12, in which a controller 16 includes a priority order calculating circuit 31 which calculates the allocation of the closed-circuit hydraulic pumps 2a to 2f to the hydraulic actuators 7a to 7c, 10c according to operation of operation levers 17a, 17b and a priority order map 32 determining priority connection relationships between the closed-circuit hydraulic pumps 2a to 2f and the hydraulic actuators 7a to 7c, 10c, and the priority order calculating circuit 31 selects and allocates an unallocated closed-circuit hydraulic pump 2a to 2f when the number of closed-circuit hydraulic pumps 2a to 2f to be allocated increases.
-
公开(公告)号：US09841037B2
公开(公告)日：2017-12-12
申请号：US14777823
申请日：2014-03-19
发明人： Yong Ho Tho , Woo Yong Jung , Yong Lak Cho
CPC分类号： F15B13/06 , E02F9/2228 , E02F9/2235 , E02F9/2267 , E02F9/2271 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20523 , F15B2211/20553 , F15B2211/20576 , F15B2211/25 , F15B2211/2656 , F15B2211/3111 , F15B2211/6346 , F15B2211/6652
摘要： Disclosed are a hydraulic system for construction equipment and a method of controlling the same, and the hydraulic system for construction equipment includes: a plurality of pressure control-type hydraulic pumps driven by an engine provided in construction equipment; an actuator driven by working oil discharged from the hydraulic pump; a closed center-type main control valve provided between the hydraulic pump and the actuator, and bypassing a virtual flow rate; and a controller configured to control the hydraulic pump by receiving the bypassed virtual flow rate from the main control valve.
-
公开(公告)号：US09840143B1
公开(公告)日：2017-12-12
申请号：US15160331
申请日：2016-05-20
发明人： Scott W. Keller , Donald Rousser
IPC分类号： B60K11/02 , F01P5/12 , F15B11/17 , B60K8/00 , A01D34/412
CPC分类号： B60K11/02 , A01D69/03 , B60K8/00 , F01P5/12 , F04B1/20 , F04B23/12 , F04B23/14 , F04B53/08 , F16H57/04
摘要： A coolant pump assembly having a combined hydraulic drive pump and a coolant circulating pump is disclosed herein, for use in connection with a utility vehicle, such as a ride-on or stand-on mower. Such a vehicle includes at least one combination pump assembly that utilizes a first fluid circuit to hydraulically drive a wheel of the vehicle and a second fluid circuit to cool one or more vehicle components.
-
-
-
-
-
-
-
-
-
搜索结果
910 条记录 (耗时 0.03 秒)
