Title:
開回路ポンプのための電気油圧比例圧力制御
Document Type and Number:
Japanese Patent JP6811766
Kind Code:
B2
Abstract:
A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston. The proportional pressure reducing valve provides a regulated pressure to a first side of the piston along with the first spring, and the hydraulic tank port provides a tank pressure on the opposite side of the piston along with the second spring. The pump control assembly also includes a stop structure having a positive stop that limits movement of the piston in a direction toward the first chamber.
Inventors:
Anneal Barasaheb Carpath
Avinash Dadaso Patil
Sanjay Dondappa Mali
Amit Ranjit Panchal
Robert Leslie Isaacs
Avinash Dadaso Patil
Sanjay Dondappa Mali
Amit Ranjit Panchal
Robert Leslie Isaacs
Application Number:
JP2018506560A
Publication Date:
January 13, 2021
Filing Date:
August 09, 2016
Export Citation:
Assignee:
Eaton Intelligent Power Limited
International Classes:
F04B49/06; F04B49/10
Domestic Patent References:
| JP63170572A | ||||
| JP53005365A | ||||
| JP10184556A |
Attorney, Agent or Firm:
Hanabusa Patent and Trademark Office