Title:
HYDRAULIC PUMP CONTROL DEVICE AND CONTROL METHOD FOR CONSTRUCTION MACHINERY
Document Type and Number:
WIPO Patent Application WO/2011/062379
Kind Code:
A2
Abstract:
The hydraulic pump control device for construction machinery according to the present invention comprises: a first swash-plate-angle adjusting unit (12) which is for controlling hydraulic pumps in construction machinery comprising a first pump (10) for supplying operating fluid via a swivel control valve (31) to a swivel motor (30) and a second pump (20) for supplying operating fluid via a working-unit control valve (41) to a working-unit actuator (40), and which adjusts the swash plate angle of the first pump (10) and thereby adjusts the volume of fluid discharged from the first pump (10) in accordance with an input pump control signal; and a controller (60) which subtracts the discharge pressure (P2) of the second pump (20) from the discharge pressure (P1) of the first pump (10) and thereby calculates the pump pressure difference (P1-P2), and which compares the calculated pump pressure difference (P1-P2) with a reference pressure difference and, if the pump pressure difference is larger than the reference pressure difference, outputs a pump control signal to the first swash-plate-angle adjusting unit (12) such that the discharge pressure (P1) of the first pump (10) becomes either smaller than a swivel relief pressure or falls below the said first reference pressure.
More Like This:
| JP2010209848 | HYDRAULIC DRIVE DEVICE OF WORK MACHINE |
| JP07279906 | HYDRAULIC CONTROL |
| JP08014205 | HYDRAULIC DRIVING DEVICE |
Inventors:
BANG, Jae Seok (1 Bowon Apt, 692 Pungdeokcheon-dong Suji-guYongin-si, Gyeonggi-do 448-170, 448-170, KR)
방재석 (경기도 용인시 수지구 풍덕천동692번지 보원아파트 105동 1312호, 448-170 Gyeonggi-do, 448-170, KR)
JUNG, Woo Yong (3-1506 Jung-ang Heights Apt, Guro-dong Guro-gu, Seoul 152-762, 152-762, KR)
방재석 (경기도 용인시 수지구 풍덕천동692번지 보원아파트 105동 1312호, 448-170 Gyeonggi-do, 448-170, KR)
JUNG, Woo Yong (3-1506 Jung-ang Heights Apt, Guro-dong Guro-gu, Seoul 152-762, 152-762, KR)
Application Number:
KR2010/007579
Publication Date:
May 26, 2011
Filing Date:
November 01, 2010
Export Citation:
Assignee:
DOOSAN INFRACORE CO., LTD. (7-11, Hwasu-dong Dong-gu, Incheon 401-020, 401-020, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11, 401-020 Incheon, 401-020, KR)
BANG, Jae Seok (1 Bowon Apt, 692 Pungdeokcheon-dong Suji-guYongin-si, Gyeonggi-do 448-170, 448-170, KR)
방재석 (경기도 용인시 수지구 풍덕천동692번지 보원아파트 105동 1312호, 448-170 Gyeonggi-do, 448-170, KR)
두산인프라코어 주식회사 (인천광역시 동구 화수동 7-11, 401-020 Incheon, 401-020, KR)
BANG, Jae Seok (1 Bowon Apt, 692 Pungdeokcheon-dong Suji-guYongin-si, Gyeonggi-do 448-170, 448-170, KR)
방재석 (경기도 용인시 수지구 풍덕천동692번지 보원아파트 105동 1312호, 448-170 Gyeonggi-do, 448-170, KR)
International Classes:
E02F9/22; E02F9/12; F04B27/08
Attorney, Agent or Firm:
LEE, Byungchul (14F, Kukdong Building 60-1,Chungmuro3-ka, Chung-ku, Seoul 100-705, 100-705, KR)
Download PDF:
Previous Patent: METHOD AND APPARATUS FOR DISPLAYING AND ARRANGING DATA 3-DIMENSIONALLY
Next Patent: SOLAR PHOTOVOLTAIC DEVICE
Next Patent: SOLAR PHOTOVOLTAIC DEVICE