SE7904686L - HYDROSTATIC DRIVE SYSTEM FOR A VEHICLE FRONT WHEEL - Google Patents

HYDROSTATIC DRIVE SYSTEM FOR A VEHICLE FRONT WHEEL

Info

Publication number
SE7904686L
SE7904686L SE7904686A SE7904686A SE7904686L SE 7904686 L SE7904686 L SE 7904686L SE 7904686 A SE7904686 A SE 7904686A SE 7904686 A SE7904686 A SE 7904686A SE 7904686 L SE7904686 L SE 7904686L
Authority
SE
Sweden
Prior art keywords
motors
wheels
drive
pump
overrun
Prior art date
Application number
SE7904686A
Other languages
Swedish (sv)
Other versions
SE441585B (en
Inventor
J I Henn
D K Pfundstein
Original Assignee
Deere & 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
Priority claimed from US05/910,571 external-priority patent/US4183419A/en
Priority claimed from US05/910,645 external-priority patent/US4177870A/en
Application filed by Deere & Co filed Critical Deere & Co
Publication of SE7904686L publication Critical patent/SE7904686L/en
Publication of SE441585B publication Critical patent/SE441585B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/444—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation by changing the number of pump or motor units in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/47—Automatic regulation in accordance with output requirements for achieving a target output speed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Control Of Fluid Gearings (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)
  • Arrangement Of Transmissions (AREA)

Abstract

In a hydrostatic transmission for driving front wheels 16 and 18 (e.g. on a grader) through respective motors 64 and 66 under the control of clutches 72 and 74 which are only engaged by pressure transmitted via valves 120, 132 when adequate pressure exists on the feed side of the respective motors, with the result that the wheels can overrun the motors, the motors are in parallel in a closed hydraulic circuit 90, 92, 94 including a variable displacement swash-plate pump 84 driven from the main engine of the vehicle, and an electrical control unit 152 responds to sensors 60 and 82 sensing rear wheel speed and the rotor speed of one of the motors 64 and 66, and to signals from switches 180 and 182 signalling selection by a forward/reverse lever of forward and reverse drive respectively, to provide a control signal to a pilot valve 102. This valve controls swash-plate actuators 98 and 100 so as (a) to make the pump 84 in the sense required for forward and reverse drive respectively, and (b) to make the pump displacement such that the front wheel motors drive at 97% or 971 DIVIDED 2% of the drive speed to the rear wheels. Since the front wheels can overrun their motors, the front drive does not act until the rear wheels experience 3% or 21 DIVIDED 2% slip. <IMAGE>
SE7904686A 1978-05-30 1979-05-29 HYDROSTATIC EXTRA DRIVE SYSTEM SE441585B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/910,571 US4183419A (en) 1978-05-30 1978-05-30 Hydrostatic front wheel drive system
US05/910,645 US4177870A (en) 1978-05-30 1978-05-30 Hydrostatic front wheel drive system

Publications (2)

Publication Number Publication Date
SE7904686L true SE7904686L (en) 1979-12-01
SE441585B SE441585B (en) 1985-10-21

Family

ID=27129554

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7904686A SE441585B (en) 1978-05-30 1979-05-29 HYDROSTATIC EXTRA DRIVE SYSTEM

Country Status (7)

Country Link
AR (1) AR219389A1 (en)
DE (1) DE2921698C2 (en)
DK (1) DK147968C (en)
ES (1) ES481020A1 (en)
FR (1) FR2427217B1 (en)
GB (1) GB2022786B (en)
SE (1) SE441585B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119066B (en) * 1982-04-16 1985-12-11 Matthias Norbert Senger Vehicle with hydrostatic transmission
US4444286A (en) * 1982-05-13 1984-04-24 Sundstrand Corporation Torque-control with overspeed regulation and method of controlling a hydrostatic drive
GB2215012A (en) * 1988-02-11 1989-09-13 Robert Jankel Vehicle with optional hydraulic transmission
US4986377A (en) * 1988-03-17 1991-01-22 Deere & Company Belted crawler having auxiliary drive
US4942934A (en) * 1988-03-17 1990-07-24 Deere & Company Belted crawler having auxiliary drive wheel
DE3842405A1 (en) * 1988-12-16 1990-06-28 Orenstein & Koppel Ag METHOD FOR ADDITIONAL HYDRAULIC DRIVE OF WHEELS ON A VEHICLE
FR2687958B1 (en) * 1992-02-28 1998-02-13 Renault Vehicules Ind DEVICE FOR CONTROLLING AN AXLE DRIVEN BY AN ADDITIONAL HYDROSTATIC TRANSMISSION FOR VEHICLES WITH TWO DRIVE MODES.
DE4210251C2 (en) * 1992-03-28 1995-04-27 Orenstein & Koppel Ag Control arrangement for vehicles with hydrostatic auxiliary drive
CZ285327B6 (en) * 1995-03-16 1999-07-14 Franz Plasser Bahnbaumaschinen-Industriegesellschaft M. B. H. Track-building machine
DE29508396U1 (en) * 1995-05-19 1995-08-10 Joseph Vögele AG, 68163 Mannheim Paver
EA201390742A1 (en) 2010-11-19 2013-10-30 Хюттенес-Альбертус Хемише Верке Гмбх CONTAINING SULPHONIC ACID CONNECTING SUBSTANCE FOR A MIXTURE OF FORMING SUBSTANCES FOR OBTAINING FORMS AND RODS
DE202012013467U1 (en) 2012-02-09 2017-01-30 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Cold box binder systems and blends for use as additives to such binder systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB949673A (en) * 1959-10-12 1964-02-19 Dowty Hydraulic Units Ltd Power transmission
DE1964708A1 (en) * 1968-12-25 1970-12-17 Mitsubishi Heavy Ind Ltd Device for synchronizing the relative speed between a driving tractor or a tractor and a towed or pushed vehicle
US3865207A (en) * 1971-04-23 1975-02-11 Hyster Co Hydraulic feed for wheel motors
DE2225257A1 (en) * 1972-05-24 1972-12-21 Carron Hydraulics Ltd, Kirkcaldy, Fife, Schottland (Großbritannien) Fluid power transmission
US3918546A (en) * 1973-11-21 1975-11-11 Clark Equipment Co Hydrostatic assist drive for vehicles
US3997017A (en) * 1974-01-14 1976-12-14 Caterpillar Tractor Co. Auxiliary hydrostatic front wheel drive system
US3981374A (en) * 1974-11-13 1976-09-21 Clark Equipment Company Hydraulic drive assist for scrapers

Also Published As

Publication number Publication date
DK220779A (en) 1979-12-01
SE441585B (en) 1985-10-21
DE2921698A1 (en) 1979-12-06
AR219389A1 (en) 1980-08-15
DK147968B (en) 1985-01-21
FR2427217B1 (en) 1986-06-13
GB2022786A (en) 1979-12-19
DE2921698C2 (en) 1984-05-10
ES481020A1 (en) 1980-02-01
GB2022786B (en) 1982-09-02
FR2427217A1 (en) 1979-12-28
DK147968C (en) 1985-08-26

Similar Documents

Publication Publication Date Title
US3918546A (en) Hydrostatic assist drive for vehicles
SE7904686L (en) HYDROSTATIC DRIVE SYSTEM FOR A VEHICLE FRONT WHEEL
GB1493003A (en) Hydrostatic propulsion system
JPS5578556U (en)
CA1107607A (en) Hydrostatic front wheel drive system
GB1385013A (en) Fluid power transmission and control system for fluid motors for driving the front wheels of a vehicle
GB1442549A (en) Speed and direction control of self-propelled vehicles
SE446444B (en) ELECTRONIC CONTROL FOR VEHICLES WITH A MAIN DRIVE DEVICE FOR CERTAIN DRIVE WHEELS AND AID DRIVE DEVICE FOR OTHER DRIVE WHEELS
US4177870A (en) Hydrostatic front wheel drive system
US4497223A (en) Engine speed control system for a hydro-mechanical transmission
EP0040381B1 (en) Hydraulic steering system for full-tracked vehicles
US4792009A (en) Four wheel drive vehicle
CA1317991C (en) Belted crawler having auxiliary drive wheel
US3727402A (en) Hydrostatic transmission speed and steering control system
CA1044563A (en) Auxiliary hydrostatic wheel drive
US4077484A (en) Hydro-electrical priority valve and speed control circuit
EP0754883A3 (en) Mechanical-hydraulic transmission gear system and method of controlling power transmission using the system
FR2169621A5 (en)
GB2047855A (en) Hydrostatic transmission and control arrangement therefor
JPS56160454A (en) Velocity ratio control unit for a stepless transmission
SE8106287L (en) CONTROLLER FOR AUTOMATIC CONTROL OF AN ADJUSTABLE HYDRAULUM PUMP TO A HYDROSTATIC VEHICLE DRIVING
GB988336A (en) Control system for track-laying vehicles
GB1480031A (en) Vehicle auxiliary hydrostatic drive system
US4805719A (en) Vehicle
US4142600A (en) Control system for auxiliary front wheel drive

Legal Events

Date Code Title Description
NUG Patent has lapsed

Ref document number: 7904686-8

Effective date: 19931210

Format of ref document f/p: F