FR2367957A1 - Systeme de commande hydraulique - Google Patents

Systeme de commande hydraulique

Info

Publication number
FR2367957A1
FR2367957A1 FR7730679A FR7730679A FR2367957A1 FR 2367957 A1 FR2367957 A1 FR 2367957A1 FR 7730679 A FR7730679 A FR 7730679A FR 7730679 A FR7730679 A FR 7730679A FR 2367957 A1 FR2367957 A1 FR 2367957A1
Authority
FR
France
Prior art keywords
pressure
valve
control valve
control
hydraulic 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.)
Granted
Application number
FR7730679A
Other languages
English (en)
Other versions
FR2367957B1 (fr
Inventor
Alfred Sigmund Smemo
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.)
Deere and Co
Original Assignee
Deere and 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 Deere and Co filed Critical Deere and Co
Publication of FR2367957A1 publication Critical patent/FR2367957A1/fr
Application granted granted Critical
Publication of FR2367957B1 publication Critical patent/FR2367957B1/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
    • F16H61/0021—Generation or control of line pressure
    • 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
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19149—Gearing with fluid drive

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)
  • Control Of Transmission Device (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Cette invention concerne un système de commande hydraulique comportant une valve de régulation de pression, des élements de réglage destinés à un mécanisme de changement de vitesse et une valve de commande. Une valve de régulation de pression d'un convertisseur maintient la pression du fluide à un minimum prédéterminé dans l'ensemble du système. Quand la valve de commande est actionnée pour relier un ou plusieurs éléments de réglage à la pompe, ce qui exige une pression plus élevée, un écoulement de liquide pilote est assuré à travers cette valve de commande, pour actionner une valve de pression de charge qui actionne elle-même une valve de régulation de pression principale, afin que la pression s'élève jusqu'au niveau désiré. Un agencement de ce type est utilisable en particulier dans les véhicules ou machines comportant des equipements de travail.
FR7730679A 1976-10-18 1977-10-12 Systeme de commande hydraulique Granted FR2367957A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/733,319 US4126059A (en) 1976-10-18 1976-10-18 Pressure boost system for a powershift transmission

Publications (2)

Publication Number Publication Date
FR2367957A1 true FR2367957A1 (fr) 1978-05-12
FR2367957B1 FR2367957B1 (fr) 1982-01-22

Family

ID=24947126

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730679A Granted FR2367957A1 (fr) 1976-10-18 1977-10-12 Systeme de commande hydraulique

Country Status (7)

Country Link
US (1) US4126059A (fr)
CA (1) CA1053122A (fr)
DE (1) DE2744792C3 (fr)
DK (1) DK150386C (fr)
FR (1) FR2367957A1 (fr)
GB (1) GB1566778A (fr)
IT (1) IT1090317B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526113A1 (fr) * 1982-04-29 1983-11-04 Graziano Spa Torino Carlo Changement de vitesses a embrayages a disques multiples a commande hydraulique
EP0141005A1 (fr) * 1983-10-24 1985-05-15 CARLO GRAZIANO S.p.A. TORINO Boîte de vitesse avec des embrayages à disques multiples commandés hydrauliquement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2658195C2 (de) * 1976-12-22 1978-12-14 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Druckmittelkreislauf für ein hydrodynamisch-mechanisches Verbundgetriebe
JPH0471861U (fr) * 1990-10-30 1992-06-25
US5778329A (en) * 1993-12-30 1998-07-07 Agco Corporation Powershift transmission system with torque-mapped shifts
US6591958B1 (en) * 2002-03-07 2003-07-15 General Motors Corporation Pressure control apparatus for a torque-transmitting mechanism
CN102767617B (zh) * 2012-07-18 2015-06-24 四川大学 一种液压换档压力控制阀

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201187B (de) * 1955-01-12 1965-09-16 Borg Warner Vorrichtung zum hydraulischen Einschalten von Reibvorrichtungen eines Kraftfahrzeuggetriebes
US3685370A (en) * 1970-06-29 1972-08-22 Gen Motors Corp Transmission control having a shift overlap valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951009A (en) * 1972-03-23 1976-04-20 Caterpillar Tractor Co. Override control system for a controlled slippable clutch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201187B (de) * 1955-01-12 1965-09-16 Borg Warner Vorrichtung zum hydraulischen Einschalten von Reibvorrichtungen eines Kraftfahrzeuggetriebes
US3685370A (en) * 1970-06-29 1972-08-22 Gen Motors Corp Transmission control having a shift overlap valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526113A1 (fr) * 1982-04-29 1983-11-04 Graziano Spa Torino Carlo Changement de vitesses a embrayages a disques multiples a commande hydraulique
EP0141005A1 (fr) * 1983-10-24 1985-05-15 CARLO GRAZIANO S.p.A. TORINO Boîte de vitesse avec des embrayages à disques multiples commandés hydrauliquement

Also Published As

Publication number Publication date
DE2744792A1 (de) 1978-08-31
DE2744792C3 (de) 1980-08-07
IT1090317B (it) 1985-06-26
GB1566778A (en) 1980-05-08
US4126059A (en) 1978-11-21
DK150386C (da) 1987-09-28
DK460977A (da) 1978-04-19
DE2744792B2 (de) 1979-11-29
DK150386B (da) 1987-02-16
FR2367957B1 (fr) 1982-01-22
CA1053122A (fr) 1979-04-24

Similar Documents

Publication Publication Date Title
FR2374569A1 (fr) Mecanisme de changement de vitesse en fonction de la charge muni d'un element hydrodynamique, tel qu'un convertisseur, et d'un ralentisseur hydrodynamique
US3535877A (en) Three-pump hydraulic system incorporating an unloader
US2272684A (en) Hydraulically actuated member and speed control therefor
US4282898A (en) Flow metering valve with operator selectable boosted flow
FR2375472A1 (fr) Installation hydraulique perfectionnee comportant un circuit de priorite
FR2363748A1 (fr) Soupape de commande du debit
US4479349A (en) Hydraulic control system
DK241383A (da) Hydraulisk ventilindretning
FR2659399A1 (fr) Commande de vanne independante de la charge, destinee a plusieurs recepteurs hydrauliques.
FR2410751A1 (fr) Perfectionnements aux generateurs hydrauliques
FR2367957A1 (fr) Systeme de commande hydraulique
GB1137914A (en) Hydrostatic transmission and control therefor
US3654835A (en) Regeneration valve
BE753983A (fr) Distributeur pilote de selection pour la commande simultanée de circuits de fluide distincts, notamment d'engins de terrassement.
US3641879A (en) Central hydraulic system for a vehicle
US2146537A (en) Automatic feed control valve
FR2388149A1 (fr) Installation hydraulique comportant une commande simultanee selective de pression et de debit
US3620129A (en) Hydraulic power circuit with emergency lowering provisions
FR2427488A1 (fr) Systeme de commande hydraulique a pompe a debit variable
US4632638A (en) Regulator valve for hydraulic control system including variable displacement pump
SE8502089L (sv) Flerfunktionsventil
US4420937A (en) Hydraulic circuit for a variable displacement pump
FR2375511A1 (fr) Circuit de transmission de fluide
FR2376345A1 (fr) Dispositif hydraulique de commande de l'embrayage de deux accouplements montes en parallele d'un mecanisme de changement de vitesse en fonction de la charge a plusieurs rapports
FR2360004A1 (fr) Ensemble de soupapes de controle de direction et de debit de fluide repondant a la charge

Legal Events

Date Code Title Description
ST Notification of lapse