GB1240918A - Control systems for trucks - Google Patents

Control systems for trucks

Info

Publication number
GB1240918A
GB1240918A GB61366/69A GB6136669A GB1240918A GB 1240918 A GB1240918 A GB 1240918A GB 61366/69 A GB61366/69 A GB 61366/69A GB 6136669 A GB6136669 A GB 6136669A GB 1240918 A GB1240918 A GB 1240918A
Authority
GB
United Kingdom
Prior art keywords
speed
truck
engine
pump
valve
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.)
Expired
Application number
GB61366/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment Co
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 by Clark Equipment Co filed Critical Clark Equipment Co
Publication of GB1240918A publication Critical patent/GB1240918A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/07572—Propulsion arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Control Of Fluid Gearings (AREA)
  • Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1,240,918. Controlling vehicles. CLARK EQUIPMENT CO. 16 Dec., 1969 [15 Jan.' 1969], No. 61366/69. Heading B7H. The speed of an engine driven truck which performs a lifting or tipping function, e.g. a fork lift truck has a control system which permits the driving of a pump for the lifting &c. function without varying the speed of the truck. As shown, a fork lift truck is driven by wheels 106 driven by a hydrostatic motor 118 supplied through a manoeuvring valve 119 by a variable displacement pump 27 controlled by a servovalve 10 and driven by an engine 30 which also drives fixed displacement pumps 1 and 26. At idling speed of the engine, pump 1 supplies a predetermined amount of oil to a control valve 4 creating a back pressure in a line 2, thereby causing a cylinder 12 to nearly close carburetter butterfly 13. An accelerator 15 increases engine speed by opening an orifice 5 in the valve 4, thereby decreasing pressure in cylinder 12 which causes butterfly 13 to open and so increase engine speed. When operation of the lift is required at maximum speed while driving the truck at low speed, a handle 22 is actuated from right to left to supply oil from the pump 26 to lift cylinder 116 and to bleed line 7 through the lift valve 8, thus causing an increase in engine speed by operation of butterfly 13. The servo valve 10 decreases the displacement of pump 20 to compensate for the increase in engine speed, such that truck speed is not increased.
GB61366/69A 1969-01-15 1969-12-16 Control systems for trucks Expired GB1240918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79135469A 1969-01-15 1969-01-15

Publications (1)

Publication Number Publication Date
GB1240918A true GB1240918A (en) 1971-07-28

Family

ID=25153462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB61366/69A Expired GB1240918A (en) 1969-01-15 1969-12-16 Control systems for trucks

Country Status (7)

Country Link
US (1) US3595343A (en)
JP (1) JPS5014420B1 (en)
BE (1) BE744407A (en)
BR (1) BR7015898D0 (en)
DE (1) DE2001523A1 (en)
FR (1) FR2028378A1 (en)
GB (1) GB1240918A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110065911A (en) * 2019-05-13 2019-07-30 安徽维德电源有限公司 A kind of middle large-tonnage electric forklift integrated power system and its control method

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2202026B1 (en) * 1972-10-11 1976-10-29 Matral Sa
US3971453A (en) * 1973-01-24 1976-07-27 Clark Equipment Company Hydrostatic control - pivot steering
US3834494A (en) * 1973-02-23 1974-09-10 Raymond Corp Manually-controlled hydraulic actuator systems
US4400939A (en) * 1979-11-23 1983-08-30 Linde Aktiengesellschaft Drive units
US4400935A (en) * 1980-01-28 1983-08-30 Sundstrand Corporation Engine speed control
JPS60189642A (en) * 1984-03-07 1985-09-27 Toyoda Autom Loom Works Ltd Controller for number of revolutions of prime mover in loading vehicle
US5201629A (en) * 1991-04-09 1993-04-13 Clark Material Handling Company Container transporter
AT400177B (en) * 1993-08-02 1995-10-25 Hoerbiger Ventilwerke Ag SAFETY DEVICE WITH PRESSURED SAFETY VALVE
US5890562A (en) * 1996-08-16 1999-04-06 Bt Prime Mover, Inc. Control console for material handling vehicle
IT1294792B1 (en) * 1997-07-24 1999-04-15 Antonio Carraro Spa TRANSMISSION EQUIPMENT PARTICULARLY FOR MOTOR VEHICLES TYPE TRACTORS OR SIMILAR
EP1550803B1 (en) * 2002-09-26 2010-01-13 Hitachi Construction Machinery Co., Ltd Prime mover controller of construction machine
DE10314337A1 (en) * 2003-03-28 2004-10-07 Zf Friedrichshafen Ag Method for operating a drive train for driving a mobile vehicle
JP4793134B2 (en) * 2005-09-30 2011-10-12 株式会社豊田自動織機 Forklift travel control device
CN104271491B (en) * 2011-12-09 2016-07-06 青岛地恩地机械设备有限公司 Hydraulic forklift automatic control system
CN114506800B (en) * 2022-04-20 2022-07-05 杭叉集团股份有限公司 Electric fork-lift portal motion control system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005562A (en) * 1959-10-29 1961-10-24 Towmotor Corp Hydraulic drive for lift truck
US3369360A (en) * 1965-11-18 1968-02-20 Charles P. De Biasi Hydraulic propulsion and braking system for vehicles or the like
US3543508A (en) * 1968-10-16 1970-12-01 Hyster Co Hydrostatic transmission with pressure control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110065911A (en) * 2019-05-13 2019-07-30 安徽维德电源有限公司 A kind of middle large-tonnage electric forklift integrated power system and its control method
CN110065911B (en) * 2019-05-13 2023-12-26 安徽维德电源有限公司 Integrated power system of medium-large tonnage electric forklift and control method thereof

Also Published As

Publication number Publication date
DE2001523A1 (en) 1970-07-30
JPS5014420B1 (en) 1975-05-27
BR7015898D0 (en) 1973-04-05
FR2028378A1 (en) 1970-10-09
US3595343A (en) 1971-07-27
BE744407A (en) 1970-06-15

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