DEVICE AND METHOD FOR CONTROL OF CONSTRUCTION MACHINERY

Title:

DEVICE AND METHOD FOR CONTROL OF CONSTRUCTION MACHINERY

Document Type and Number:

WIPO Patent Application WO/2000/065240

Kind Code:

A1

Abstract:

A device and a method for control of construction machinery capable of controlling a pump flow rate so that a pump delivery pressure does not rise excessively even in a grading operation so as to suppress an engine output loss, and thus preventing a fuel efficiency from being deteriorated; the device comprising hydraulic pumps (51) and (52), a plurality of operation members (54), and a control means (1) to control a delivery flow rate from the hydraulic pumps; the control means (1) comprising a boom fine operation judgment means (2) which judges whether or not a boom fine operation is performed based on the manipulated variable of a boom operating member (54a), a stick fine operation judgment means (3) which judges whether or not a stick fine operation is performed based on the manipulated variable of a stick operating member (54b), a bucket fine operation judgment means (4) which judges whether or not a bucket fine operation is performed based on the manipulated variable of a bucket operating member (54c), and a pump inclination angle control means (5) which performs the inclination angle control of the hydraulic pumps (51) and (52) based on the judgment results of the boom fine operation judgment means (2), stick fine operation judgment means (3), and bucket fine operation judgment means (4).

More Like This:

JPH0842507	SHOCK PREVENTION APPARATUS FOR HYDRAULIC/AIR-PRESSURE MACHINERY AND METHOD THEREFOR
WO/1991/015106	DRAFT CONTROL APPARATUS AND METHOD

Inventors:

ONDA KIMIMASA (JP)

Application Number:

PCT/JP2000/002442

Publication Date:

November 02, 2000

Filing Date:

April 14, 2000

Export Citation:

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Assignee:

CATERPILLAR MITSUBISHI LTD (JP)
ONDA KIMIMASA (JP)

International Classes:

E02F9/20; E02F9/22; F15B11/16; F15B11/17; (IPC1-7): F15B11/00; E02F9/22

Foreign References:

JPH10227047A	1998-08-25
JPS5837302A	1983-03-04

Attorney, Agent or Firm:

Sanada, Tamotsu (Kichijoji-honcho 1-chome Musashino-shi Tokyo, JP)

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