GB854219A - Improvements in or relating to hydraulic power transmission systems with a variable displacement pump and motor - Google Patents

Improvements in or relating to hydraulic power transmission systems with a variable displacement pump and motor

Info

Publication number
GB854219A
GB854219A GB35374/56A GB3537456A GB854219A GB 854219 A GB854219 A GB 854219A GB 35374/56 A GB35374/56 A GB 35374/56A GB 3537456 A GB3537456 A GB 3537456A GB 854219 A GB854219 A GB 854219A
Authority
GB
United Kingdom
Prior art keywords
wheel
motor
engine
piston
control
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
GB35374/56A
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.)
Von Roll AG
Original Assignee
Von Roll AG
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 Von Roll AG filed Critical Von Roll AG
Publication of GB854219A publication Critical patent/GB854219A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/42Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/433Pump capacity control by fluid pressure control means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/42Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • F16H61/423Motor capacity control by fluid pressure control means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/46Automatic regulation in accordance with output requirements
    • F16H61/462Automatic regulation in accordance with output requirements for achieving a target speed ratio
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H61/00Control 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
    • F16H61/38Control of exclusively fluid gearing
    • F16H61/40Control of exclusively fluid gearing hydrostatic
    • F16H61/46Automatic regulation in accordance with output requirements
    • F16H61/468Automatic regulation in accordance with output requirements for achieving a target input torque
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/101Infinitely variable gearings
    • B60W10/103Infinitely variable gearings of fluid type

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

854,219. Fluid-pressure servomotor-control systems ; hydraulic control systems. GESELLSCHAFT DER L. VON ROLL'SCHEN EISENWERKE A.G. Nov. 19, 1956 [Nov. 19, 1955], No. 35374/56. Classes 69 (2) and 135. A diesel engine 1, Fig. 5, drives the axle 9 of a vehicle via reduction gearing 7, 8 and an hydraulic transmission comprising a variable displacement vane, radial or rotary-cylinder pump and motor 4 and 5, respectively ; the fuel supplied to the engine is controlled by a regulator 73. The engine may consist of any type of thermal engine or an electric motor. Forward control.-Forward movement of the vehicle is obtained by axially pulling a control wheel 41 in the forward direction, the wheel having been previously set in the B position, so that a sleeve 43 engages a wheel 45 ; the control wheel 41 is then rotated clockwise to a position +#B, thereby turning a cam plate 35 until it covers another identical cam plate 34 so freeing a crank-pin 25 for movement in the arcuate slots in the cam plates. The position of crankpin 25 is determined by a power governor 10 comprising a piston 17 connected to the pressure line 20 of the hydraulic transmission via a line 18 and a rotary valve 19 ; the rod 22 of piston 17 extends through a spring housing 23 and is pivotally connected to a rod 24 supporting the crank-pin 25. The housing 23 contains a spring 26 having a hyperbolic compression characteristic which at one end bears on a disc attached to the rod 22 and at the other end abuts a piston 28 slidable in the housing 23, the underside of the piston 28 being open to line 18 through a restriction 31. The crank-pin 25 is connected by a cable 16 to a pilot valve 13 having a moving seat follow-up with a piston 14, also supplied with fluid from line 18, that controls the displacement of the pump 4 in the range +#1. A wheel 52 is turned concomitantly with control wheel 41 in the direction of the arrow V so setting the valve 19 to connect lines 18, 56 to the line 20, the line 56 leading to a pressure regulator 11 comprising a cylinder 57, the piston 58 in which sets the displacement of the motor 5 ; the opposite end of the cylinder 57 is also connected to line 56 via a restriction 60. When the control wheel 41 reaches position - #B it is pushed axially into the central position so disengaging the sleeve 43. Reverse control.-The control wheel 41 is pushed axially from the central position to engage sleeve 43 with a wheel 44, the wheel 41 then being turned anticlockwise to the position - #B in order to obtain reverse movement of the vehicle, the sequence of events being as described above but in the opposite direction with cam 34 moving over cam 35 and lines 18 and 56 being connected by valve 19 with a line 55 which now carries pressure fluid between the pump 4 and motor 5. Constant torque control.-Rotation of the control wheel 41 beyond either position + or - #B towards # max. regulates the engine speed and the speed at which the transmission functions through a shaft 64 driven from the wheel 41 on which shaft are cams 65a, 65b, 66 and 67 ; cams 65a, 65b control brake valves 69, 70 in lines 20, 55 respectively, cam 66 is connected to a bridge valve 71 between lines 20, 55 and cam 67 controls the fuel regulator 73. When the control wheel 41 is in the position -j- or - #B the valves 69, 70 are closed, the valve 71 is open and the regulator 73 is set for engine idling, hence the motor 5 is at a standstill. With the control wheel 41 in either position + or - #0, the valves 69, 70, 71 are open, the engine continues to idle and the motor remains stationary. With the wheel 41 in either position + or - #1 the valve 71 closes so that the motor 5 begins to operate and the engine speeds up. As the wheel 41 reaches the # max. position the engine 1 and hence pump 4 attains normal speed. The output speed of the transmission is controlled for primary regulation by adjusting the pump displacement from zero to a maximum whilst the motor 5 is in the position of maximum displacement; secondary regulation is effected when the pump is at maximum displacement and the motor displacement is reduced. During engine run-up the transmission hydraulic pressure is first held constant by the governor 10 and in a higher speed range by the regulator 11. The governor 10 provides a constant output torque. Variable torque operation.-The governor 10a, Fig. 8, is provided with a spring 76 the bias of which is varied by rotating and axially displaaing a conical member 77 ; rotation is effected by link 79 and axial displacement is effected by a further cam on the shaft 64, Fig. 5. The spring 76 acts upon a valve 75 which determines whether one side of a piston F1 is open to pressure or exhaust, the other side of the piston being permanently open to pressure ; the piston varies the displacement of the pump 4 and operates the link 79. The member 97 (not shown) and link 79 may be dispensed with.
GB35374/56A 1955-11-19 1956-11-19 Improvements in or relating to hydraulic power transmission systems with a variable displacement pump and motor Expired GB854219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH854219X 1955-11-19

Publications (1)

Publication Number Publication Date
GB854219A true GB854219A (en) 1960-11-16

Family

ID=4542536

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35374/56A Expired GB854219A (en) 1955-11-19 1956-11-19 Improvements in or relating to hydraulic power transmission systems with a variable displacement pump and motor

Country Status (1)

Country Link
GB (1) GB854219A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230699A (en) * 1964-01-21 1966-01-25 Sundstrand Corp Hydrostatic transmission
DE1292982B (en) * 1961-03-13 1969-04-17 Sundstrand Corp Hydrostatic transmission
DE1450778B1 (en) * 1963-07-08 1970-08-20 New York Air Brake Co Actuator for setting the ratio of a hydrostatic transmission
US10981621B2 (en) 2017-07-10 2021-04-20 Gustav Magenwirth Gmbh & Co. Kg Hydraulic line connection for a hydraulic brake for handlebar steering and handlebar with hydraulic brake

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292982B (en) * 1961-03-13 1969-04-17 Sundstrand Corp Hydrostatic transmission
DE1450821B1 (en) * 1961-03-13 1970-05-14 Sundstrand Corp Actuator for adjustable hydrostatic machines of a transmission
DE1450778B1 (en) * 1963-07-08 1970-08-20 New York Air Brake Co Actuator for setting the ratio of a hydrostatic transmission
US3230699A (en) * 1964-01-21 1966-01-25 Sundstrand Corp Hydrostatic transmission
US10981621B2 (en) 2017-07-10 2021-04-20 Gustav Magenwirth Gmbh & Co. Kg Hydraulic line connection for a hydraulic brake for handlebar steering and handlebar with hydraulic brake

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