Title:
A system and a method of maintaining the load of an oil pressure system uniformly
Document Type and Number:
Japanese Patent JP6161634
Kind Code:
B2
Abstract:
A hydraulic system includes a pump (22) that draws fluid from a reservoir (24) and an actuator (26) having a first port and a second port. A metering valve arrangement (28) controls fluid flow through the actuator and includes a meter-in valve (30a, 30d) positioned between the pump and the first port and a meter-out valve (30b, 30c) positioned between the second port and the reservoir. A controller (34) controls operation of the metering valve arrangement. In a meter-in mode, the controller controls a fluid flow rate through the actuator by controlling an orifice size of the meter-in valve. In a meter-out mode, the controller controls a fluid flow rate through the actuator by controlling an orifice size of the meter-out valve. The controller determines the fluid flow rate through the actuator based on data derived from the meter-out valve in both the meter-in mode and the meter-out mode.
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Inventors:
Gehrhof, Wade, Leo
Application Number:
JP2014555563A
Publication Date:
July 12, 2017
Filing Date:
January 16, 2013
Export Citation:
Assignee:
EATON CORPORATION
International Classes:
E02F9/22; F15B11/04; F15B11/02
Domestic Patent References:
| JP6213208A | ||||
| JP9060605A |
Attorney, Agent or Firm:
Calyx
Miyazaki Yoshio
Akio Tagami
High Masahiro
Miyazaki Yoshio
Akio Tagami
High Masahiro