EP0539589A4 - - Google Patents

Info

Publication number
EP0539589A4
EP0539589A4 EP91912321A EP91912321A EP0539589A4 EP 0539589 A4 EP0539589 A4 EP 0539589A4 EP 91912321 A EP91912321 A EP 91912321A EP 91912321 A EP91912321 A EP 91912321A EP 0539589 A4 EP0539589 A4 EP 0539589A4
Authority
EP
European Patent Office
Prior art keywords
capacity
torque
variable
hydraulic pump
output characteristics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91912321A
Other languages
French (fr)
Other versions
EP0539589A1 (en
EP0539589B1 (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of EP0539589A1 publication Critical patent/EP0539589A1/en
Publication of EP0539589A4 publication Critical patent/EP0539589A4/en
Application granted granted Critical
Publication of EP0539589B1 publication Critical patent/EP0539589B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2232—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps
    • E02F9/2235—Control of flow rate; Load sensing arrangements using one or more variable displacement pumps including an electronic controller
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2246—Control of prime movers, e.g. depending on the hydraulic load of work tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/04—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving pumps

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A method and a unit for controlling a vehicle for loading operation which carries a variable capacity hydraulic pump (PV) for operating a loading machine and a torque converter (T) for driving itself. The control unit comprises an engine (E) provided with an electronically controlled governor (10) capable of selecting output characteristics stepwise; means (12), (14), (42) and (43) for setting stepwise the maximum capacity and output torque of the variable-capacity hydraulic pump (PV) for operating the loading machine; means (44), (45) for detecting a pump capacity and hydraulic pressure; switches (42), (43) for selecting output characteristics of the engine; a governor controller (11) for controlling to the output characteristics selected by the selecting switches; and a pump controller (41) for selectively setting the maximum capacity and output torque characteristics of the variable-capacity hydraulic pump (PV) in accordance with the engine output characteristics selected by the selecting switches. Accordingly, even if the hydraulic torque fluctuates at the time of high pressure in the variable-capacity hydraulic pump, the fluctuating range of absorption torque of the torque converter can be controlled, thereby enabling to perform earth-sand scoop-up working with ease and efficiently.
EP91912321A 1990-07-18 1991-07-16 Method and unit for controlling vehicle for loading operation Expired - Lifetime EP0539589B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP187869/90 1990-07-18
JP2187869A JP2520771B2 (en) 1990-07-18 1990-07-18 Control method and apparatus for loading work vehicle
PCT/JP1991/000948 WO1992001869A1 (en) 1990-07-18 1991-07-16 Method and unit for controlling vehicle for loading operation

Publications (3)

Publication Number Publication Date
EP0539589A1 EP0539589A1 (en) 1993-05-05
EP0539589A4 true EP0539589A4 (en) 1995-03-22
EP0539589B1 EP0539589B1 (en) 1997-01-02

Family

ID=16213642

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91912321A Expired - Lifetime EP0539589B1 (en) 1990-07-18 1991-07-16 Method and unit for controlling vehicle for loading operation

Country Status (4)

Country Link
EP (1) EP0539589B1 (en)
JP (1) JP2520771B2 (en)
DE (1) DE69123971T2 (en)
WO (1) WO1992001869A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3274541B2 (en) * 1993-07-06 2002-04-15 株式会社日立製作所 Water purification plant management support method and support system
JPH09177679A (en) * 1995-12-22 1997-07-11 Hitachi Constr Mach Co Ltd Pump torque control device
DE19644961A1 (en) * 1996-10-29 1998-04-30 Samsung Heavy Ind Method for controlling the motor-pump system of a hydraulic construction machine
US6073442A (en) * 1998-04-23 2000-06-13 Caterpillar Inc. Apparatus and method for controlling a variable displacement pump
KR20000021949A (en) * 1998-09-30 2000-04-25 토니헬샴 Controller of rotation frequency in engine and method thereof
JP3561667B2 (en) * 1999-11-18 2004-09-02 新キャタピラー三菱株式会社 Control device for hydraulic pump
DE10314329A1 (en) * 2003-03-28 2004-10-21 Zf Friedrichshafen Ag Powertrain for driving a mobile vehicle
JP4163073B2 (en) * 2003-08-12 2008-10-08 日立建機株式会社 Control device for work vehicle
JP4754969B2 (en) * 2006-01-10 2011-08-24 株式会社小松製作所 Engine control device for work vehicle
WO2007129613A1 (en) * 2006-05-10 2007-11-15 Sumitomo (S.H.I.) Construction Machinery Manufacturing Co., Ltd. Overload prevention device for construction machine
US8718878B2 (en) * 2007-04-04 2014-05-06 Clark Equipment Company Power machine or vehicle with power management
JP4714721B2 (en) * 2007-09-19 2011-06-29 日立建機株式会社 Traveling hydraulic working machine
JP5226734B2 (en) * 2010-05-20 2013-07-03 株式会社小松製作所 Hybrid construction machinery
JPWO2015064747A1 (en) * 2014-10-31 2017-03-09 株式会社小松製作所 Wheel loader and wheel loader control method
FR3027971B1 (en) * 2014-11-05 2016-11-11 Groupe Mecalac DEVICE FOR CONTROLLING THE POWER OF A HYDRAULIC PUMP
JP6087382B2 (en) * 2015-03-20 2017-03-01 株式会社小松製作所 Wheel loader and wheel loader control method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015482A (en) * 1975-04-14 1977-04-05 Kabushiki Kaisha Komatsu Seisakusho Control system for power train and auxiliary equipment driven from a common prime mover
EP0214633A1 (en) * 1985-09-07 1987-03-18 Hitachi Construction Machinery Co., Ltd. Control system for hydraulically-operated construction machinery
JPS63195402A (en) * 1987-02-06 1988-08-12 Komatsu Ltd Hydraulic controller
JPS63235631A (en) * 1987-03-24 1988-09-30 Komatsu Ltd Engine output control means for bulldozer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2724820B2 (en) * 1986-12-18 1998-03-09 株式会社小松製作所 Control device for variable displacement hydraulic pump
JP2587819B2 (en) * 1986-12-27 1997-03-05 日立建機株式会社 Hydraulic control device for construction machinery
JP2511925B2 (en) * 1987-01-30 1996-07-03 株式会社小松製作所 Construction machine engine speed control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4015482A (en) * 1975-04-14 1977-04-05 Kabushiki Kaisha Komatsu Seisakusho Control system for power train and auxiliary equipment driven from a common prime mover
EP0214633A1 (en) * 1985-09-07 1987-03-18 Hitachi Construction Machinery Co., Ltd. Control system for hydraulically-operated construction machinery
JPS63195402A (en) * 1987-02-06 1988-08-12 Komatsu Ltd Hydraulic controller
JPS63235631A (en) * 1987-03-24 1988-09-30 Komatsu Ltd Engine output control means for bulldozer

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 12, no. 475 (M - 774) 13 December 1988 (1988-12-13) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 25 (M - 787) 20 January 1989 (1989-01-20) *
See also references of WO9201869A1 *

Also Published As

Publication number Publication date
DE69123971T2 (en) 1997-04-30
WO1992001869A1 (en) 1992-02-06
EP0539589A1 (en) 1993-05-05
EP0539589B1 (en) 1997-01-02
DE69123971D1 (en) 1997-02-13
JP2520771B2 (en) 1996-07-31
JPH0476126A (en) 1992-03-10

Similar Documents

Publication Publication Date Title
EP0539589A4 (en)
CN100389254C (en) Control device for working vehicle
KR20030093943A (en) Hybrid type construction machine
JPS62240439A (en) Driving device for hydraulic drive driven by diesel engine
EP0695875A4 (en) Hydraulic pump controller
US20220307595A1 (en) Hydraulic circuit architecture with enhanced operation efficency
CN100439722C (en) Hydraulic control apparatus and hydraulic control method
CN100443741C (en) Engine lag down suppressing device of construction machinery
JPS57171042A (en) Control system for series including internal-combustion engine and hydraulic pump
EP0553348A4 (en) System for controlling number of rotations of prime mover in hydraulically driven vehicle
JP2566750B2 (en) Hydraulic pump drive engine control method
US6447423B1 (en) Method and apparatus for adjusting transmission ratio commands for a continuously variable transmission
JP2715180B2 (en) Control device for hydraulic drive machine
KR0184512B1 (en) Direction and speed control unit for fluid pressure operator
KR100240090B1 (en) Engine generating power control apparatus and method of hydraulic construction machine
GB2128718A (en) Drive unit consisting of an internal combustion engine and a steplessly adjustable hydrostatic transmission
JP2892871B2 (en) Agricultural work machine traveling control device
KR920000190Y1 (en) Throttle valve control device in heavy equipment engine
JPS5632088A (en) Input torque controlling system for variable displacement pump
JPH01170730A (en) Hydraulic pump controlling method for construction equipment
JPH02190536A (en) Controller for operation mode of oil pressure-driven vehicle
JP2821339B2 (en) Control device of construction machine with attachment
SU577322A1 (en) Electrohydraulic step drive
JPS5740156A (en) Pressure control device in oil pressure circuit
JP3005134B2 (en) Work vehicle travel control device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930115

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE SE

A4 Supplementary search report drawn up and despatched
AK Designated contracting states

Kind code of ref document: A4

Designated state(s): DE SE

17Q First examination report despatched

Effective date: 19950831

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE SE

REF Corresponds to:

Ref document number: 69123971

Country of ref document: DE

Date of ref document: 19970213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970717

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980401

EUG Se: european patent has lapsed

Ref document number: 91912321.6