GB2022786A - Hydrostatic Vehicle Auxiliary Wheel Drive System - Google Patents

Hydrostatic Vehicle Auxiliary Wheel Drive System

Info

Publication number
GB2022786A
GB2022786A GB7914869A GB7914869A GB2022786A GB 2022786 A GB2022786 A GB 2022786A GB 7914869 A GB7914869 A GB 7914869A GB 7914869 A GB7914869 A GB 7914869A GB 2022786 A GB2022786 A GB 2022786A
Authority
GB
United Kingdom
Prior art keywords
motors
wheels
drive
pump
overrun
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
GB7914869A
Other versions
GB2022786B (en
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.)
Deere and Co
Original Assignee
Deere and 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 and Co filed Critical Deere and Co
Publication of GB2022786A publication Critical patent/GB2022786A/en
Application granted granted Critical
Publication of GB2022786B publication Critical patent/GB2022786B/en
Expired legal-status Critical Current

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>
GB7914869A 1978-05-30 1979-04-30 Hydrostatic vehicle auxiliary wheel drive system Expired GB2022786B (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
GB2022786A true GB2022786A (en) 1979-12-19
GB2022786B GB2022786B (en) 1982-09-02

Family

ID=27129554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7914869A Expired GB2022786B (en) 1978-05-30 1979-04-30 Hydrostatic vehicle auxiliary wheel 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)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119066A (en) * 1982-04-16 1983-11-09 Matthias Norbert Senger Vehicle with hydrostatic transmission
FR2526972A1 (en) * 1982-05-13 1983-11-18 Sundstrand Corp OVERSIZE CONTROL TORQUE CONTROL DEVICE AND METHOD FOR CONTROLLING HYDROSTATIC TRANSMISSION
GB2215012A (en) * 1988-02-11 1989-09-13 Robert Jankel Vehicle with optional hydraulic transmission
FR2640558A1 (en) * 1988-12-16 1990-06-22 Orenstein & Koppel Ag METHOD FOR AUXILIARY HYDRAULIC DRIVE OF WHEELS ON A VEHICLE
EP0413852A1 (en) * 1989-07-07 1991-02-27 Deere & Company Tracked vehicle with main and auxiliary driving wheels
FR2687958A1 (en) * 1992-02-28 1993-09-03 Renault Vehicules Ind Device for controlling an axle driven by an additional hydrostatic transmission for vehicles with two methods of drive
EP0732450A1 (en) * 1995-03-16 1996-09-18 Franz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H. Railway construction vehicle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942934A (en) * 1988-03-17 1990-07-24 Deere & Company Belted crawler having auxiliary drive wheel
DE4210251C2 (en) * 1992-03-28 1995-04-27 Orenstein & Koppel Ag Control arrangement for vehicles with hydrostatic auxiliary drive
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

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119066A (en) * 1982-04-16 1983-11-09 Matthias Norbert Senger Vehicle with hydrostatic transmission
FR2526972A1 (en) * 1982-05-13 1983-11-18 Sundstrand Corp OVERSIZE CONTROL TORQUE CONTROL DEVICE AND METHOD FOR CONTROLLING HYDROSTATIC TRANSMISSION
GB2215012A (en) * 1988-02-11 1989-09-13 Robert Jankel Vehicle with optional hydraulic transmission
FR2640558A1 (en) * 1988-12-16 1990-06-22 Orenstein & Koppel Ag METHOD FOR AUXILIARY HYDRAULIC DRIVE OF WHEELS ON A VEHICLE
EP0413852A1 (en) * 1989-07-07 1991-02-27 Deere & Company Tracked vehicle with main and auxiliary driving wheels
FR2687958A1 (en) * 1992-02-28 1993-09-03 Renault Vehicules Ind Device for controlling an axle driven by an additional hydrostatic transmission for vehicles with two methods of drive
EP0732450A1 (en) * 1995-03-16 1996-09-18 Franz Plasser Bahnbaumaschinen-Industriegesellschaft m.b.H. Railway construction vehicle

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
DE2921698C2 (en) 1984-05-10
ES481020A1 (en) 1980-02-01
GB2022786B (en) 1982-09-02
SE7904686L (en) 1979-12-01
FR2427217A1 (en) 1979-12-28
DK147968C (en) 1985-08-26

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee