ES481020A1 - Hydrostatic Vehicle Auxiliary Wheel Drive System - Google Patents
Hydrostatic Vehicle Auxiliary Wheel Drive SystemInfo
- Publication number
- ES481020A1 ES481020A1 ES481020A ES481020A ES481020A1 ES 481020 A1 ES481020 A1 ES 481020A1 ES 481020 A ES481020 A ES 481020A ES 481020 A ES481020 A ES 481020A ES 481020 A1 ES481020 A1 ES 481020A1
- Authority
- ES
- Spain
- 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.)
- Expired
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.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/910,645 US4177870A (en) | 1978-05-30 | 1978-05-30 | Hydrostatic front wheel drive system |
US05/910,571 US4183419A (en) | 1978-05-30 | 1978-05-30 | Hydrostatic front wheel drive system |
Publications (1)
Publication Number | Publication Date |
---|---|
ES481020A1 true ES481020A1 (en) | 1980-02-01 |
Family
ID=27129554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES481020A Expired ES481020A1 (en) | 1978-05-30 | 1979-05-29 | 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) |
Families Citing this family (12)
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 |
US4942934A (en) * | 1988-03-17 | 1990-07-24 | Deere & Company | Belted crawler having auxiliary drive wheel |
US4986377A (en) * | 1988-03-17 | 1991-01-22 | Deere & Company | Belted crawler having auxiliary drive |
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 |
JP2013544191A (en) | 2010-11-19 | 2013-12-12 | ヒユツテネス−アルベルトス ヘーミッシエ ヴエルケ ゲーエムベーハー | Sulfonic acid-containing binders for casting compounds for making molds and cores |
DE102012201971B4 (en) | 2012-02-09 | 2024-09-12 | HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung | Use of a mixture as an additive for the polyisocyanate component of a two-component binder system for producing a polyurethane resin, polyisocyanate-containing solution for use as a component of a molding material binder system, two-component binder system for producing a polyurethane resin, mixture for producing a core or a mold for the foundry, mold or core for the foundry and method for producing a core or a mold |
Family Cites Families (7)
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 |
-
1979
- 1979-04-30 GB GB7914869A patent/GB2022786B/en not_active Expired
- 1979-05-29 DE DE19792921698 patent/DE2921698C2/en not_active Expired
- 1979-05-29 ES ES481020A patent/ES481020A1/en not_active Expired
- 1979-05-29 SE SE7904686A patent/SE441585B/en not_active IP Right Cessation
- 1979-05-29 DK DK220779A patent/DK147968C/en not_active IP Right Cessation
- 1979-05-30 FR FR7913750A patent/FR2427217B1/en not_active Expired
- 1979-05-30 AR AR27673779A patent/AR219389A1/en active
Also Published As
Publication number | Publication date |
---|---|
SE7904686L (en) | 1979-12-01 |
DE2921698C2 (en) | 1984-05-10 |
DK220779A (en) | 1979-12-01 |
FR2427217A1 (en) | 1979-12-28 |
FR2427217B1 (en) | 1986-06-13 |
GB2022786A (en) | 1979-12-19 |
AR219389A1 (en) | 1980-08-15 |
DK147968B (en) | 1985-01-21 |
DK147968C (en) | 1985-08-26 |
GB2022786B (en) | 1982-09-02 |
SE441585B (en) | 1985-10-21 |
DE2921698A1 (en) | 1979-12-06 |
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