FR2255516A1 - Control for hydrostatic transmission motor - movement of control valve piston is linear with increasing output pressure - Google Patents

Control for hydrostatic transmission motor - movement of control valve piston is linear with increasing output pressure

Info

Publication number
FR2255516A1
FR2255516A1 FR7438815A FR7438815A FR2255516A1 FR 2255516 A1 FR2255516 A1 FR 2255516A1 FR 7438815 A FR7438815 A FR 7438815A FR 7438815 A FR7438815 A FR 7438815A FR 2255516 A1 FR2255516 A1 FR 2255516A1
Authority
FR
France
Prior art keywords
control
valve
pressure
output pressure
movement
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Withdrawn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
FR7438815A
Other languages
French (fr)
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.)
Hydromatik GmbH
Original Assignee
Hydromatik GmbH
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 Hydromatik GmbH filed Critical Hydromatik GmbH
Publication of FR2255516A1 publication Critical patent/FR2255516A1/en
Withdrawn legal-status Critical Current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
    • F16H61/439—Control of the neutral position, e.g. by zero tilt rotation holding 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
    • F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Motors (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

The directional command for the hydraulic motor (7) is given by a valve in which the piston is normally held centrally by two springs. An auxiliary pump feeds fluid to this valve via a feed pipe (21) and a three position direction switch (9). A second pipe (22) connects the valve via a pressure regulator valve (16) to the fluid reservoir. Depending on the pump output pressure (3) the regulator valve either discharges the control fluid to the reservoir (normal) or puts the full control pressure on the direction switch (high). In the latter case the pressure back-up neutralises the piston in the control valve and reverses the motor. The pressure regulator valve has a two-piece piston, interconnected by springs, to give a movement directly proportional to output pressure.
FR7438815A 1973-12-19 1974-11-27 Control for hydrostatic transmission motor - movement of control valve piston is linear with increasing output pressure Withdrawn FR2255516A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732363333 DE2363333A1 (en) 1973-12-19 1973-12-19 DEVICE FOR ADJUSTING THE HYDROPUMP AND / OR THE MOTOR OF A HYDROSTATIC TRANSMISSION

Publications (1)

Publication Number Publication Date
FR2255516A1 true FR2255516A1 (en) 1975-07-18

Family

ID=5901286

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7438815A Withdrawn FR2255516A1 (en) 1973-12-19 1974-11-27 Control for hydrostatic transmission motor - movement of control valve piston is linear with increasing output pressure

Country Status (4)

Country Link
JP (1) JPS5092502A (en)
DE (1) DE2363333A1 (en)
FR (1) FR2255516A1 (en)
IT (1) IT1027097B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55173750U (en) * 1979-05-31 1980-12-12
DE3844399C2 (en) * 1988-12-30 1997-08-07 Rexroth Mannesmann Gmbh Control arrangement for several independently operable hydraulic consumers and their use

Also Published As

Publication number Publication date
IT1027097B (en) 1978-11-20
JPS5092502A (en) 1975-07-24
DE2363333A1 (en) 1975-10-30

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Legal Events

Date Code Title Description
ST Notification of lapse