FR2301741A1 - Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function - Google Patents

Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function

Info

Publication number
FR2301741A1
FR2301741A1 FR7505278A FR7505278A FR2301741A1 FR 2301741 A1 FR2301741 A1 FR 2301741A1 FR 7505278 A FR7505278 A FR 7505278A FR 7505278 A FR7505278 A FR 7505278A FR 2301741 A1 FR2301741 A1 FR 2301741A1
Authority
FR
France
Prior art keywords
augmenting
chambers
ports
valve function
balancing unit
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.)
Granted
Application number
FR7505278A
Other languages
French (fr)
Other versions
FR2301741B1 (en
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR7505278A priority Critical patent/FR2301741A1/en
Publication of FR2301741A1 publication Critical patent/FR2301741A1/en
Application granted granted Critical
Publication of FR2301741B1 publication Critical patent/FR2301741B1/fr
Granted 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
    • F16H61/4078—Fluid exchange between hydrostatic circuits and external sources or consumers
    • F16H61/4139—Replenishing or scavenging pumps, e.g. auxiliary charge pumps
    • 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
    • F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
    • 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
    • F16H61/4017—Control of high pressure, e.g. avoiding excess pressure by a relief valve

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Motors (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The balancing unit for hydro-static transmissions with pressurised motor to pump feeds has piloted relief piston valves augmenting the input valve function. The assembly has two relief valves with piloted piston valves, two ports into the pump to hydro- static motor feed, and a third port connecting with a high pressure source and the reservoir return feed. The ports (101, 101') are closed by cone nosed pistons (105) which slide in chambers (104, 104'). Fine bores (106, 106') traverse the pistons from chambers (104) to ports (101), cavity (103) links ports (101, 101') with the third port (103') and chambers (104) are closed by pilot valves (122, 122') locating in chambers (119, 119') which in turn contact to the fluid reservoir (R).
FR7505278A 1975-02-20 1975-02-20 Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function Granted FR2301741A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7505278A FR2301741A1 (en) 1975-02-20 1975-02-20 Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7505278A FR2301741A1 (en) 1975-02-20 1975-02-20 Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function

Publications (2)

Publication Number Publication Date
FR2301741A1 true FR2301741A1 (en) 1976-09-17
FR2301741B1 FR2301741B1 (en) 1978-10-27

Family

ID=9151477

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7505278A Granted FR2301741A1 (en) 1975-02-20 1975-02-20 Balancing unit for pressure fed hydrostatic transmission - has piloted relief valves augmenting input valve function

Country Status (1)

Country Link
FR (1) FR2301741A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4631980A (en) * 1982-03-09 1986-12-30 Kubota, Ltd. Hydraulic circuit construction for a tractor having a hydraulic stepless change speed apparatus
EP0297489A2 (en) * 1987-07-02 1989-01-04 Neuhaus, Hermann, Ing. grad. Hydraulically driven lifting device
WO2013118356A1 (en) * 2012-02-06 2013-08-15 住友重機械工業株式会社 Hydraulic closed circuit system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107807A1 (en) * 1970-09-28 1972-05-12 Lucas Industries Ltd

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2107807A1 (en) * 1970-09-28 1972-05-12 Lucas Industries Ltd

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4631980A (en) * 1982-03-09 1986-12-30 Kubota, Ltd. Hydraulic circuit construction for a tractor having a hydraulic stepless change speed apparatus
EP0297489A2 (en) * 1987-07-02 1989-01-04 Neuhaus, Hermann, Ing. grad. Hydraulically driven lifting device
EP0297489A3 (en) * 1987-07-02 1989-07-05 Hermann Ing. Grad. Neuhaus Hydraulically driven lifting device
WO2013118356A1 (en) * 2012-02-06 2013-08-15 住友重機械工業株式会社 Hydraulic closed circuit system

Also Published As

Publication number Publication date
FR2301741B1 (en) 1978-10-27

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Legal Events

Date Code Title Description
ST Notification of lapse