Title:
CAPACITY CONTROL DEVICE FOR HYDRAULIC PUMP IN HYDRAULIC CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JPH0854005
Kind Code:
A
Abstract:
PURPOSE: To perform capacity control of a hydraulic pump so as not to deteriorate operation of each actuator in the case that a plurality of actuators having different load pressures are simultaneously operated by means of a common hydraulic pump.
CONSTITUTION: A load pressure is fed back to a hydraulic pump 11 when a turning motor 7 and a boom cylinder 8 are simultaneously operated. The load pressure is controlled within a range between a load pressure of the turning motor and the load pressure of the boom cylinder by means of a block valve 23. The block valve is a modulation type which is continuously switched.
Inventors:
IWAMOTO TAKATSU
WADA ATSUSHI
WADA ATSUSHI
Application Number:
JP20816994A
Publication Date:
February 27, 1996
Filing Date:
August 09, 1994
Export Citation:
Assignee:
CATERPILLAR MITSUBISHI LTD
International Classes:
E02F9/22; F04B49/00; F15B11/00; F15B11/05; F15B11/16; (IPC1-7): F15B11/16; E02F9/22; F04B49/00; F15B11/00; F15B11/05
Attorney, Agent or Firm:
Tetsuo Hirose