-
公开(公告)号：US20220381006A1
公开(公告)日：2022-12-01
申请号：US17334653
申请日：2021-05-28
Applicant: Caterpillar Inc.
Inventor： Kalpeshkumar N. Patel , Darren A. Blum , Aleksandar M. Egelja , Barrett A. Flinn , Ryan P. McEnaney , Trung Q. Nguyen , David J. Lomax
IPC: E02F9/22 , F04B23/06 , F04B17/03 , F04B49/06 , F04B49/20 , E02F3/43 , E02F9/20 , E02F9/12 , E02F3/32 , E02F3/42 , F15B15/20
Abstract: One embodiment of a hydraulic system for a machine has a first hydraulic circuit including a first pump coupled to a first hydraulic actuator configured to move a first implement of the machine. A second hydraulic circuit includes a second pump coupled to a second hydraulic actuator configured to move a second implement. An electric motor mechanically couples to the first pump and to the second pump. An operator interface receives input from an operator requesting movement of the first and second implements. A controller communicatively coupled to the electric motor and to the operator interface determines, based on the requested movement of the first and second implements respectively, first and second flow allocations respectively for the first and second pumps and determines respective target displacements for the first and second pumps. The controller also determines first and second target electric motor speeds based on the target displacements for the first and second pumps, respectively, and controls the electric motor to operate at the larger of the first and second target electric motor speeds.
-
公开(公告)号：US10774850B2
公开(公告)日：2020-09-15
申请号：US15957172
申请日：2018-04-19
Applicant: Caterpillar Inc.
Inventor： Steven J. Juricak , David J. Lomax , Paul A. Rousseau
Abstract: A hydraulic system for a machine includes a first pump, an implement pump, a control valve, and an auxiliary circuit. The first pump is configured to supply a first fluid flow to a first circuit, such as a steering circuit. The implement pump is configured to supply a second fluid flow to an implement circuit to actuate a primary implement function. The auxiliary circuit is configured to deliver fluid flow to actuate an auxiliary implement function. The auxiliary circuit is fluidly coupled to the implement circuit. The auxiliary circuit is also coupled to the first circuit by the control valve. The control valve is located downstream, in the direction of fluid flow, of the implement pump and the first pump. The control valve is configured to allow at least a portion of the first fluid flow to enter the auxiliary circuit and be delivered to the auxiliary implement function.
-
Patent Agency Ranking
公开(公告)号：US20190323525A1
公开(公告)日：2019-10-24
申请号：US15957172
申请日：2018-04-19
Applicant: CATERPILLAR INC.
Inventor： Steven J. Juricak , David J. Lomax , Paul A. Rousseau
Abstract: A hydraulic system for a machine includes a first pump, an implement pump, a control valve, and an auxiliary circuit. The first pump is configured to supply a first fluid flow to a first circuit, such as a steering circuit. The implement pump is configured to supply a second fluid flow to an implement circuit to actuate a primary implement function. The auxiliary circuit is configured to deliver fluid flow to actuate an auxiliary implement function. The auxiliary circuit is fluidly coupled to the implement circuit. The auxiliary circuit is also coupled to the first circuit by the control valve. The control valve is located downstream, in the direction of fluid flow, of the implement pump and the first pump. The control valve is configured to allow at least a portion of the first fluid flow to enter the auxiliary circuit and be delivered to the auxiliary implement function.
-
4.发明授权公开(公告)号：US10233951B2
公开(公告)日：2019-03-19
申请号：US15286135
申请日：2016-10-05
Applicant: Caterpillar Inc.
Inventor： David J. Lomax , Joshua D. Callaway
Abstract: A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.
-
5.发明申请MACHINE HAVING HYDRAULICALLY ACTUATED IMPLEMENT SYSTEM WITH COMBINED RIDE CONTROL AND DOWNFORCE CONTROL SYSTEM 有权具有组合式控制和下降控制系统的液压执行系统的机器公开(公告)号：US20140178164A1
公开(公告)日：2014-06-26
申请号：US13721313
申请日：2012-12-20
Applicant: CATERPILLAR INC.
Inventor： Jeremy T. Peterson , Jeffrey L. Kuehn , David J. Lomax , Michael L. Knussman
CPC classification number: E02F3/432 , E02F9/0841 , E02F9/2207 , E02F9/2217 , F15B1/021 , F15B1/033 , F15B21/082 , F15B2211/625 , F15B2211/6346 , F15B2211/6653 , F15B2211/6658 , F15B2211/7128 , F15B2211/85 , F15B2211/8606 , F15B2211/8616 , Y10T137/85986
Abstract: A machine is disclosed. The machine can include a frame and ground engaging propulsion elements coupled with the frame. A hydraulically actuated implement system can be coupled with the frame, and can include a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode. The ride control mode can be configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure, and the downforce control mode can be configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement engages a substrate with a predetermined down force pressure which is proportionate to the downforce control pressure.
Abstract translation: 公开了一种机器。 机器可以包括与框架联接的框架和接地推进元件。 液压致动的工具系统可以与框架联接，并且可以包括构造成与工具联接的联动装置，与联动装置和框架联接的液压致动器以及被配置成实现行驶控制模式的行驶控制和下压力控制电路 和下压力控制模式。 行驶控制模式可以被配置为在液压致动器中保持液压流体在行驶控制压力下的压力，并且下压力控制模式可被构造成将液压致动器中的液压流体的压力维持在下压力控制压力 联动装置和工具的重量使得工具以与下压力控制压力成比例的预定下压力与基板接合。
-
6.发明申请公开(公告)号：US20180094650A1
公开(公告)日：2018-04-05
申请号：US15286135
申请日：2016-10-05
Applicant: Caterpillar Inc.
Inventor： David J. Lomax , Joshua D. Callaway
CPC classification number: F15B13/0871 , F16K31/36 , F16K37/0083 , G05D7/005 , G05D7/0635
Abstract: A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.
-
7.发明授权Machine having hydraulically actuated implement system with combined ride control and downforce control system 有权具有液压致动实施系统的机器具有组合的行驶控制和下压力控制系统公开(公告)号：US09068323B2
公开(公告)日：2015-06-30
申请号：US13721313
申请日：2012-12-20
Applicant: Caterpillar Inc.
Inventor： Jeremy T. Peterson , Jeffrey L. Kuehn , David J. Lomax , Michael L. Knussman
CPC classification number: E02F3/432 , E02F9/0841 , E02F9/2207 , E02F9/2217 , F15B1/021 , F15B1/033 , F15B21/082 , F15B2211/625 , F15B2211/6346 , F15B2211/6653 , F15B2211/6658 , F15B2211/7128 , F15B2211/85 , F15B2211/8606 , F15B2211/8616 , Y10T137/85986
Abstract: A machine is disclosed. The machine can include a frame and ground engaging propulsion elements coupled with the frame. A hydraulically actuated implement system can be coupled with the frame, and can include a linkage configured to couple with an implement, a hydraulic actuator coupled with the linkage and the frame, and a ride control and downforce control circuit configured to implement a ride control mode and a downforce control mode. The ride control mode can be configured to maintain a pressure of hydraulic fluid in the hydraulic actuator at a ride control pressure, and the downforce control mode can be configured to maintain the pressure of hydraulic fluid in the hydraulic actuator at a downforce control pressure to oppose the weight of the linkage and the implement such that the implement engages a substrate with a predetermined down force pressure which is proportionate to the downforce control pressure.
Abstract translation: 公开了一种机器。 机器可以包括与框架联接的框架和接地推进元件。 液压致动的工具系统可以与框架联接，并且可以包括构造成与工具联接的联动装置，与联动装置和框架联接的液压致动器以及被配置成实现行驶控制模式的行驶控制和下压力控制电路 和下压力控制模式。 行驶控制模式可以被配置为在液压致动器中保持液压流体在行驶控制压力下的压力，并且下压力控制模式可被构造成将液压致动器中的液压流体的压力维持在下压力控制压力 联动装置和工具的重量使得工具以与下压力控制压力成比例的预定下压力与基板接合。
-
-
-
-
-
-
Search Results
7
records
(took 0.012 seconds)
