EP2955379A3 - Hydraulically controlled hydrostatic transmission - Google Patents

Hydraulically controlled hydrostatic transmission Download PDF

Info

Publication number
EP2955379A3
EP2955379A3 EP15163556.2A EP15163556A EP2955379A3 EP 2955379 A3 EP2955379 A3 EP 2955379A3 EP 15163556 A EP15163556 A EP 15163556A EP 2955379 A3 EP2955379 A3 EP 2955379A3
Authority
EP
European Patent Office
Prior art keywords
swashplate
hydrostatic transmission
hydraulically controlled
actuator
controlled hydrostatic
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.)
Withdrawn
Application number
EP15163556.2A
Other languages
German (de)
French (fr)
Other versions
EP2955379A2 (en
Inventor
David Mark Heathcoat Jr
Roger Gray
Kirk Ayres LOLA
Kerry Brock
Michael T Crosby
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.)
Parker Hannifin Corp
Original Assignee
Parker Hannifin Corp
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 Parker Hannifin Corp filed Critical Parker Hannifin Corp
Publication of EP2955379A2 publication Critical patent/EP2955379A2/en
Publication of EP2955379A3 publication Critical patent/EP2955379A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/30—Control of machines or pumps with rotary cylinder blocks
    • F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
    • F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/26—Control
    • F04B1/28—Control of machines or pumps with stationary cylinders
    • F04B1/29—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block
    • F04B1/295—Control of machines or pumps with stationary cylinders by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members

Abstract

A hydrostatic transmission system includes a pump including a rotatable swashplate. Rotation of the swashplate effects a change in volumetric displacement of the pump. An actuator is coupled to the swashplate and effects rotation of the swashplate to change the volumetric displacement of the pump. An electronic controller is operatively coupled to the actuator and commands the actuator to effect rotation of the swashplate.
EP15163556.2A 2014-04-14 2015-04-14 Hydraulically controlled hydrostatic transmission Withdrawn EP2955379A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201461979291P 2014-04-14 2014-04-14

Publications (2)

Publication Number Publication Date
EP2955379A2 EP2955379A2 (en) 2015-12-16
EP2955379A3 true EP2955379A3 (en) 2016-01-20

Family

ID=53005470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163556.2A Withdrawn EP2955379A3 (en) 2014-04-14 2015-04-14 Hydraulically controlled hydrostatic transmission

Country Status (2)

Country Link
US (1) US20150292499A1 (en)
EP (1) EP2955379A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10442292B2 (en) * 2017-12-14 2019-10-15 Schiller Grounds Care, Inc. System for infinitely variable speed control
EP3760021B1 (en) * 2018-03-28 2021-09-29 Nanjing Chervon Industry Co., Ltd. Riding lawn mower
US11731688B2 (en) * 2019-06-04 2023-08-22 Cnh Industrial America Llc Differential steering control vehicle, system and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002044563A1 (en) * 2000-11-28 2002-06-06 Ingersoll-Rand Company Direct drive variable displacement pump
EP1462647A2 (en) * 2003-03-25 2004-09-29 Sauer Bibus GmbH Rotary cylinder fluid pressure machine
US20050084387A1 (en) * 2003-10-15 2005-04-21 Sauer-Danfoss Inc. Control system for hydrostatic pump
WO2014022228A1 (en) * 2012-07-30 2014-02-06 Parker-Hannifin Corporation Pump control system and method

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6332393B1 (en) * 1999-07-16 2001-12-25 Hydro-Gear Limited Partnership Pump
US6375433B1 (en) * 2000-07-07 2002-04-23 Caterpillar Inc. Method and apparatus for controlling pump discharge pressure of a variable displacement hydraulic pump
US6623247B2 (en) * 2001-05-16 2003-09-23 Caterpillar Inc Method and apparatus for controlling a variable displacement hydraulic pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002044563A1 (en) * 2000-11-28 2002-06-06 Ingersoll-Rand Company Direct drive variable displacement pump
EP1462647A2 (en) * 2003-03-25 2004-09-29 Sauer Bibus GmbH Rotary cylinder fluid pressure machine
US20050084387A1 (en) * 2003-10-15 2005-04-21 Sauer-Danfoss Inc. Control system for hydrostatic pump
WO2014022228A1 (en) * 2012-07-30 2014-02-06 Parker-Hannifin Corporation Pump control system and method

Also Published As

Publication number Publication date
US20150292499A1 (en) 2015-10-15
EP2955379A2 (en) 2015-12-16

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