GB1282094A - Control systems for hydraulic transmission systems - Google Patents

Control systems for hydraulic transmission systems

Info

Publication number
GB1282094A
GB1282094A GB3547868A GB3547868A GB1282094A GB 1282094 A GB1282094 A GB 1282094A GB 3547868 A GB3547868 A GB 3547868A GB 3547868 A GB3547868 A GB 3547868A GB 1282094 A GB1282094 A GB 1282094A
Authority
GB
United Kingdom
Prior art keywords
valve
pressure
piston
pump
passage
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
GB3547868A
Inventor
Richard Joseph Ifield
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Joseph Lucas Industries Ltd
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 Lucas Industries Ltd, Joseph Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB3547868A priority Critical patent/GB1282094A/en
Publication of GB1282094A publication Critical patent/GB1282094A/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
    • F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
    • F16H39/04—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit
    • F16H39/06—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type
    • F16H39/08—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motor and pump combined in one unit pump and motor being of the same type each with one main shaft and provided with pistons reciprocating in cylinders
    • 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
    • F16H61/4008—Control of circuit pressure
    • F16H61/4026—Control of low pressure
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

1282094 Hydrostatic transmission JOSEPH LUCAS (INDUSTRIES) Ltd 24 Oct 1969 [25 July 1968] 35478/68 Headings F2C and F2D In an hydrostatic transmission comprising an axial piston pump 1 and a motor 3 both including cylinder blocks 8 abutting a ported member 10, turning of the member 10 about a fixed axis X is effective to vary the transmission ratio, and is effected by a rack 13 meshing teeth 12 on the periphery of the member 10, the rack 13 being formed on the piston 14 of a servo and fluid being introduced into opposite ends of the servo cylinder 21 at a pressure dependent on (a) engine speed as represented by an enginedriven gear pump 43, (b) the pressure in the high pressure delivery or return port 18 or 19 respectively, interconnecting the pump and motor, and (c) the position of the engine throttle. Engine-driven pump 43 delivers via a throttlepositioned valve 45 to passage 47 connected to passage 48 and then via shuttle valve 49 or 52 to the lower pressure port 18 or 19. Pressure relief valve 58 is subjected to opposing pressures from ports 18 and 19 to relieve pressure in the lower pressure port. Differential pressure across valve 45 acts on valve 72 to disconnect conduits 67, 68 to opposite ends of servopiston 14. Manual F-N-R valve 76 connects 68 or 69 to exhaust. The valve 45 is positioned by a throttle pedal 42 acting through linkage 101 and a cam slot 102 in member 104 is positioned by piston 14 acting via a roller 108. Pressure from valve 45 also acts on a spool valve 89 to feed back to the piston 96 positioning the fulcrum of throttle linkage 98, 99. Release of fluid from servo cylinder 21 is effected through either axial bore 36, 37 in the piston and radial bores 38 or 39 which communicate with a helical groove 35 in a rod 25 and having an orifice 34 communicating with an axial bore 32. The bore connects with outlet 24 connected to passage 69, and the rod 25 may be turned manually to connect groove 35 with bore 38 and/or 39.
GB3547868A 1968-07-25 1968-07-25 Control systems for hydraulic transmission systems Expired GB1282094A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3547868A GB1282094A (en) 1968-07-25 1968-07-25 Control systems for hydraulic transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3547868A GB1282094A (en) 1968-07-25 1968-07-25 Control systems for hydraulic transmission systems

Publications (1)

Publication Number Publication Date
GB1282094A true GB1282094A (en) 1972-07-19

Family

ID=10378176

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3547868A Expired GB1282094A (en) 1968-07-25 1968-07-25 Control systems for hydraulic transmission systems

Country Status (1)

Country Link
GB (1) GB1282094A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427521A1 (en) * 1978-05-30 1979-12-28 Linde Ag CONTROL AND REGULATION DEVICE FOR A HYDRAULIC TRANSMISSION
EP0232053A2 (en) * 1986-01-20 1987-08-12 Honda Giken Kogyo Kabushiki Kaisha Swash plate type hydraulic system
US4741251A (en) * 1985-05-28 1988-05-03 Honda Giken Kogyo Kabushiki Kaisha Swashplate assembly for a swashplate type hydraulic pressure device
US4745748A (en) * 1985-06-28 1988-05-24 Honda Giken Kogyo Kabushiki Kaisha Clutch valve system for static hydraulic continuously variable transmission
US4748898A (en) * 1985-05-28 1988-06-07 Honda Giken Kogyo Kabushiki Kaisha Switching valve device
US4845951A (en) * 1985-06-28 1989-07-11 Honda Giken Kogyo Kabushiki Kaisha Static hydraulic continuously variable transmission
US4860540A (en) * 1984-12-26 1989-08-29 Honda Giken Kogyo Kabushiki Kaisha Static hydraulic pressure type continuously variable transmission
US4875390A (en) * 1986-03-24 1989-10-24 Honda Giken Kogyo Kabushiki Kaisha Shift control device for hydrostatic continuously variable transmission
US4914914A (en) * 1987-06-03 1990-04-10 Honda Giken Kogyo Kabushiki Kaisha Hydrostatically operated continuously variable transmission

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427521A1 (en) * 1978-05-30 1979-12-28 Linde Ag CONTROL AND REGULATION DEVICE FOR A HYDRAULIC TRANSMISSION
US4860540A (en) * 1984-12-26 1989-08-29 Honda Giken Kogyo Kabushiki Kaisha Static hydraulic pressure type continuously variable transmission
US4741251A (en) * 1985-05-28 1988-05-03 Honda Giken Kogyo Kabushiki Kaisha Swashplate assembly for a swashplate type hydraulic pressure device
US4748898A (en) * 1985-05-28 1988-06-07 Honda Giken Kogyo Kabushiki Kaisha Switching valve device
USRE33455E (en) * 1985-05-28 1990-11-27 Honda Giken Kogyo Kabushiki Kaisha Swashplate assembly for a swashplate type hydraulic pressure device
US4745748A (en) * 1985-06-28 1988-05-24 Honda Giken Kogyo Kabushiki Kaisha Clutch valve system for static hydraulic continuously variable transmission
US4845951A (en) * 1985-06-28 1989-07-11 Honda Giken Kogyo Kabushiki Kaisha Static hydraulic continuously variable transmission
EP0232053A2 (en) * 1986-01-20 1987-08-12 Honda Giken Kogyo Kabushiki Kaisha Swash plate type hydraulic system
EP0232053A3 (en) * 1986-01-20 1987-09-30 Honda Giken Kogyo Kabushiki Kaisha Swash plate type hydraulic system
US4781022A (en) * 1986-01-20 1988-11-01 Honda Giken Kogyo Kabushiki Kaisha Swash plate type hydraulic system
US4875390A (en) * 1986-03-24 1989-10-24 Honda Giken Kogyo Kabushiki Kaisha Shift control device for hydrostatic continuously variable transmission
US4914914A (en) * 1987-06-03 1990-04-10 Honda Giken Kogyo Kabushiki Kaisha Hydrostatically operated continuously variable transmission

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Legal Events

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