GB941735A - Improvements in or relating to hydrostatic transmissions - Google Patents

Improvements in or relating to hydrostatic transmissions

Info

Publication number
GB941735A
GB941735A GB18238/61A GB1823861A GB941735A GB 941735 A GB941735 A GB 941735A GB 18238/61 A GB18238/61 A GB 18238/61A GB 1823861 A GB1823861 A GB 1823861A GB 941735 A GB941735 A GB 941735A
Authority
GB
United Kingdom
Prior art keywords
pressure
lines
line
pump
steering
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
GB18238/61A
Inventor
Robert Colin Pearson
Thomas Mark Burrett
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB18238/61A priority Critical patent/GB941735A/en
Priority to FR893487A priority patent/FR1325884A/en
Publication of GB941735A publication Critical patent/GB941735A/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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/437—Pump capacity control by mechanical control means, e.g. by levers or pedals
    • 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
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/10—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
    • B62D11/14—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
    • B62D11/18—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
    • B62D11/183—Control systems therefor
    • 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
    • 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/423—Motor capacity control by fluid pressure control means
    • 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
    • F16H61/456—Control of the balance of torque or speed between pumps or motors
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/08—Construction or shape of optical resonators or components thereof
    • H01S3/081—Construction or shape of optical resonators or components thereof comprising three or more reflectors
    • H01S3/082—Construction or shape of optical resonators or components thereof comprising three or more reflectors defining a plurality of resonators, e.g. for mode selection or suppression

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)

Abstract

941,735. Motor vehicle hydraulic steering and driving gear. R. C. PEARSON. Feb. 12, 1962 [May 18, 1961], No. 18238/61. Heading B7H. [Also in Division F2] In an hydrostatic transmission, for a wheeled or tracked vehicle, comprising a pump or pump set 2 supplying two variable displacement motors or motor sets 21, 22 in parallel, each controlled by an hydraulic jack 30 or 31 responsive to pressure in the high pressure fluid supply line above a predetermined pressure, steering control is effected by reducing the effect of the hydraulic pressure on one jack to reduce the displacement of the corresponding motor. Prime mover 1 drives reversible pump 2 with interchangeable supply and return lines 15, 16 to the motors, boost pump 3 supplying pump servo control valve 5 and the required minimum pressure to jacks 30, 31 through line 13 and pump 4 maintaining the fluid circuit full. Shuttle or equivalent valves 41 and 60 respectively maintain line 42 at the higher pressure of lines 15 and 16, and the inlet ports 108, 109 of steering valve 45 at the higher pressure of lines 13 and 42. In the neutral position of steering valve 45 this high fluid pressure is supplied through lines 48, 49, change-over valve 50 and lines 142, 143 to the jacks 30, 31. The positions of the pistons 34 which have damping holes 36 is determined by the balance of the fluid pressure on the larger area side of the piston on the one hand and the spring load and fluid pressure on the smaller piston rod side of the piston on the other hand. Increase in line pressure moves the pistons to increase the motor displacement. Downward movement of lever 43 to steer the vehicle moves frame 47 and valve spool 44 downwards when first pressure port 109 is cut off from line 48 by land 120 and then line 48 and jack 30 are connected with outlet port 110 and hence line 14 and reservoir 11. The resulting reduction in pressure in jack 30 allows the spring to move the piston to reduce the motor displacement. " Feel " is provided at lever 43 by springs 63, 64 and the difference in pressures in chambers 152, 153 acting on the spool 44, the chambers 152, 153 communicating through passages 150, 151 with the lines 48, 49. Change-over valve 50 is connected between lines 15, 16 so that when the pressure differential between lines 15, 16 is reversed, as when the transmission changes from the drive condition to the over-run condition, the connections between lines 48, 49 and the jacks are reversed so that the steering effect is not reversed. Specifications 902,185 and 941,737 are referred to.
GB18238/61A 1961-05-18 1961-05-18 Improvements in or relating to hydrostatic transmissions Expired GB941735A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18238/61A GB941735A (en) 1961-05-18 1961-05-18 Improvements in or relating to hydrostatic transmissions
FR893487A FR1325884A (en) 1961-05-18 1962-04-05 Improvements to hydrostatic transmissions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18238/61A GB941735A (en) 1961-05-18 1961-05-18 Improvements in or relating to hydrostatic transmissions

Publications (1)

Publication Number Publication Date
GB941735A true GB941735A (en) 1963-11-13

Family

ID=10109032

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18238/61A Expired GB941735A (en) 1961-05-18 1961-05-18 Improvements in or relating to hydrostatic transmissions

Country Status (2)

Country Link
FR (1) FR1325884A (en)
GB (1) GB941735A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349860A (en) * 1964-07-02 1967-10-31 Sundstrand Corp Hydrostatic transmission
US5076377A (en) * 1985-11-11 1991-12-31 Ifield Engineering Pty. Limited Steering system for vehicles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349860A (en) * 1964-07-02 1967-10-31 Sundstrand Corp Hydrostatic transmission
US5076377A (en) * 1985-11-11 1991-12-31 Ifield Engineering Pty. Limited Steering system for vehicles

Also Published As

Publication number Publication date
FR1325884A (en) 1963-05-03

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