GB1209412A - Engine-driven hydraulic pump control - Google Patents

Engine-driven hydraulic pump control

Info

Publication number
GB1209412A
GB1209412A GB813169A GB813169A GB1209412A GB 1209412 A GB1209412 A GB 1209412A GB 813169 A GB813169 A GB 813169A GB 813169 A GB813169 A GB 813169A GB 1209412 A GB1209412 A GB 1209412A
Authority
GB
United Kingdom
Prior art keywords
rod
engine
valve
transmission
overload
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
GB813169A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation 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
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB1209412A publication Critical patent/GB1209412A/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
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/478—Automatic regulation in accordance with output requirements for preventing overload, e.g. high pressure limitation
    • 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
    • F16H61/433—Pump 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
    • F16H61/46—Automatic regulation in accordance with output requirements

Landscapes

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

Abstract

1,209,412. Hydrostatic transmission control. GENERAL MOTORS CORP. 14 Feb., 1969 [28 Feb., 1968; 22 March, 1968], No. 8131/69. Heading F2D. In a vehicle hydrostatic transmission in which the inclination of the pump swashplate 51 is adjusted manually by a rod 71 moved in opposite directions for forward and reverse, an automatic control is operative to override the manual control if the ratio selected causes engine overload or overspeed. As shown, the swashplate is moved by servomotor 58, 59 controlled by a rotary valve 17 positioned by a lever 47. The rod 71 is operative on the lever 47 through a central pin 79 fast with rod 71 and a rod 68 connected to the lever. The pin 79 is received in a cylinder portion 75 of the rod 68 and is connected thereto by a spring 92. Under normal conditions, movement of rod 78 is transmitted to rod 68 via spring 92 to rotate the spool 48 of valve 17 to adjust the swashplate. A feedback to the sleeve 49 of the valve 17 disconnects the valve from the swashplate when it reaches its selected position. In the event of engine overload as determined by the force exerted by a rod 35 connected to the engine throttle, e.g. accelerator pedal, and acting on one end of a valve spool 31, and governor pressure in line 44 from an engine-driven governor 12 acting in opposition on the spool 31, an overload signal 41 is delivered from valve 16 to either chamber 85 or 86 defined between the pin 79 and cylinder portion 75 of rod 68 to move the rod 68 relative to the rod 71 to downshift the transmission and reduce the overload. Overspeed of the engine, e.g. on downhill coasting is prevented by governor pressure 44 forcing spool 31 up to connect engine-driven pump pressure 15 through the valve 16 to the apply line 45 of vehicle brakes 46. Engine braking on overspeeding may be provided by connecting line 45 to exhaust ports 97, 98 to upshift the transmission. Again, Fig. 3 (not shown), overload line (41<SP>1</SP>) is connected to equal sized chambers (115), (116) to provide equal response times to downshift the transmission in forward and reverse. The overspeed line (45<SP>1</SP>) is connected to the respective chamber (115), (116) on overspeed to upshift the transmission.
GB813169A 1968-02-28 1969-02-14 Engine-driven hydraulic pump control Expired GB1209412A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70900768A 1968-02-28 1968-02-28
US71521368A 1968-03-22 1968-03-22

Publications (1)

Publication Number Publication Date
GB1209412A true GB1209412A (en) 1970-10-21

Family

ID=27108188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB813169A Expired GB1209412A (en) 1968-02-28 1969-02-14 Engine-driven hydraulic pump control

Country Status (4)

Country Link
DE (1) DE1909638C3 (en)
FR (1) FR2002819A1 (en)
GB (1) GB1209412A (en)
SE (1) SE349521B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469853A (en) * 2009-04-30 2010-11-03 Agco Sa Vehicle control system for preventing overspeed.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2469853A (en) * 2009-04-30 2010-11-03 Agco Sa Vehicle control system for preventing overspeed.

Also Published As

Publication number Publication date
SE349521B (en) 1972-10-02
DE1909638A1 (en) 1970-01-15
DE1909638C3 (en) 1974-02-14
DE1909638B2 (en) 1973-07-26
FR2002819A1 (en) 1969-10-31

Similar Documents

Publication Publication Date Title
US3003309A (en) Single lever control apparatus for engine and hydraulic transmission
USRE32175E (en) (Pneumatic) hydraulic control system for an automatic vehicle transmission
CA1116485A (en) Engine-transmission control system
GB1137914A (en) Hydrostatic transmission and control therefor
GB1230944A (en)
US4313353A (en) Control system for an automatic transmission
GB1496475A (en) Transmission ratio control system
GB632498A (en) Improvements in and relating to automatic fluid pressure actuated transmission for aself-propelled vehicle
GB1035822A (en) Infinitely variable transmission
US3368426A (en) Control mechanism for engine combined with infinitely variable transmission
US2972391A (en) Power throttle and vehicle speed control mechanism
GB1493301A (en) Automatic vehicle brake control
US3167907A (en) Infinitely variable transmission
GB1160437A (en) Forward-Reverse Drive Controls.
US3913419A (en) Torque limiting system and method
US3896685A (en) Transmission control for a transmission having one drive establishing device for two independent drive functions
US3426624A (en) Transmission,motor and brake control
US3283606A (en) Automatic regulators for hydrostatic transmissions of automobile vehicles
GB1285543A (en) Control system for a hydrostatic transmission
GB1209412A (en) Engine-driven hydraulic pump control
US3302724A (en) Automatic control apparatus for variable pitch propellers
US3871177A (en) Control device for a hydrostatic transmission
US3174362A (en) Transmission
GB972709A (en) Improvements in or relating to hydraulic power transmission systems
US3533230A (en) Hydraulic transmission mechanism for vehicles

Legal Events

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