Title:
DISCHARGE FLOW RATE CONTROL DEVICE OF HYDRAULIC PUMP
Document Type and Number:
Japanese Patent JP2567193
Kind Code:
B2
Abstract:
PURPOSE: To improve work performance by facilitating the operation through a process of simplifying a regulator structure of a hydraulic pump, by calculating back the pump maximum dischargeable flow rate through a process of detecting output pressure of the pump, and by increasing energy efficiency through a process of increasing the pump output to the maximum extent on the basis of an output limit value of a motor.
CONSTITUTION: A pump output control device is provided with a first calculating means for calculating the input demanded amount by combining operating signals received by an operating means 11, a second calculating means for calculating the maximum dischargeable flow rate of a hydraulic pump 3 on the basis of a selected value of an output selecting means 2 and a pressure value read from a first detecting means, a comparing means for comparing the input demanded flow rate with the maximum dischargeable flow rate, a second selecting means for taking the maximum dischargeable flow rate as a pump output flow rate value when the input demanded flow rate is greater than the maximum dischargeable flow rate, and a means for controlling the discharge flow rate of the hydraulic pump 3 by outputting the pump output flow rate value by an electromagnetic proportional pressure reducing valve.
Inventors:
RI CHINKAN
Application Number:
JP705593A
Publication Date:
December 25, 1996
Filing Date:
January 19, 1993
Export Citation:
Assignee:
SANSEI JUKOGYO KK
International Classes:
F04B49/06; F15B11/00; G05B11/32; G05D7/06; G05D16/20; (IPC1-7): F15B11/00
Domestic Patent References:
| JP1312202A | ||||
| JP6275107A | ||||
| JP646501A | ||||
| JP62220702A | ||||
| JP58134201A | ||||
| JP63162982U | ||||
| JP62115504U | ||||
| JP1501241A |
Attorney, Agent or Firm:
Shusaku Yamamoto