公开(公告)号：US20190145433A1

公开(公告)日：2019-05-16

申请号：US16098013

申请日：2017-04-25

Applicant: Parker-Hannifin Corporation

Inventor： Randall D. Thompson ,  Ralf Gomm ,  Vivek Bhaskar ,  Björn Eriksson

IPC: F15B11/17 ,  E02F9/22

CPC classification number: F15B11/17 ,  E02F9/2292 ,  F15B2211/20515 ,  F15B2211/20523 ,  F15B2211/20576 ,  F15B2211/613 ,  F15B2211/7142 ,  F15B2211/781 ,  F15B2211/88

Abstract: A hydraulic system includes one or more hydraulic subsystems that have a source of additional flow for supplying an auxiliary system. The hydraulic system may include one or more actuator systems, a boost system, and a further hydraulic system, such as a steering system. The source of additional flow for supplying the auxiliary system may include: sizing the boost system for providing both full boost function and auxiliary function, sizing the steering system for providing both full steering function and auxiliary function, utilizing available flow from an unused actuator function, and/or utilizing a selector manifold for actively selecting the source of auxiliary flow based on the flow and pressure demands of the respective hydraulic systems. Such a hydraulic system enables flow to be available to an auxiliary function regardless of the flow requirements for the actuator functions and/or other vehicle functions, while also minimizing interactions and flow disruptions to the various hydraulic subsystems.

公开(公告)号：US10724554B2

公开(公告)日：2020-07-28

申请号：US16098013

申请日：2017-04-25

Applicant: Parker-Hannifin Corporation

Inventor： Randall D. Thompson ,  Ralf Gomm ,  Vivek Bhaskar ,  Björn Eriksson

IPC: F15B11/17 ,  E02F9/22

Abstract: A hydraulic system includes one or more hydraulic subsystems that have a source of additional flow for supplying an auxiliary system. The hydraulic system may include one or more actuator systems, a boost system, and a further hydraulic system, such as a steering system. The source of additional flow for supplying the auxiliary system may include: sizing the boost system for providing both full boost function and auxiliary function, sizing the steering system for providing both full steering function and auxiliary function, utilizing available flow from an unused actuator function, and/or utilizing a selector manifold for actively selecting the source of auxiliary flow based on the flow and pressure demands of the respective hydraulic systems. Such a hydraulic system enables flow to be available to an auxiliary function regardless of the flow requirements for the actuator functions and/or other vehicle functions, while also minimizing interactions and flow disruptions to the various hydraulic subsystems.

公开(公告)号：US10138915B2

公开(公告)日：2018-11-27

申请号：US15312959

申请日：2015-05-15

Applicant: Parker-Hannifin Corporation

Inventor： Vivek Bhaskar ,  Bjoern Eriksson ,  Ralf Gomm

IPC: F15B21/08 ,  E02F9/22 ,  F15B7/00 ,  F15B11/024 ,  E02F9/20 ,  F15B11/08 ,  F15B13/02 ,  F15B13/04 ,  F15B19/00 ,  E02F3/32

Abstract: An electro-hydraulic actuation system includes a regeneration valve in fluid communication with a first fluid chamber and a second fluid chamber of a hydraulic actuator, and a dump valve is in fluid communication with the second fluid chamber and a fluid reservoir. A pump provides a flow of fluid to the first and second fluid chambers, a displacement of the pump controlling a velocity of the actuator during motion in the retraction and extension directions. An electric motor drives the pump, and a controller controls a state of the regeneration valve and the dump valve. At least one feedback device senses a system condition and provides a respective feedback signal indicative of the sensed system condition to the controller, the controller responsive to the feedback signal to determine an occurrence of an over-center load condition and control a state of the regeneration valve and the dump valve in response to the occurrence to maintain the velocity of the actuator.