FR2282073A1 - Four wheel hydraulic drive - with separate front and rear hydraulic circuits joined by flow restrictions - Google Patents

Four wheel hydraulic drive - with separate front and rear hydraulic circuits joined by flow restrictions

Info

Publication number
FR2282073A1
FR2282073A1 FR7525006A FR7525006A FR2282073A1 FR 2282073 A1 FR2282073 A1 FR 2282073A1 FR 7525006 A FR7525006 A FR 7525006A FR 7525006 A FR7525006 A FR 7525006A FR 2282073 A1 FR2282073 A1 FR 2282073A1
Authority
FR
France
Prior art keywords
circuits
wheel
hydraulic
flow restrictions
separate front
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
FR7525006A
Other languages
French (fr)
Other versions
FR2282073B3 (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.)
Cessna Aircraft Co
Original Assignee
Cessna Aircraft 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 Cessna Aircraft Co filed Critical Cessna Aircraft Co
Publication of FR2282073A1 publication Critical patent/FR2282073A1/en
Application granted granted Critical
Publication of FR2282073B3 publication Critical patent/FR2282073B3/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
    • B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
    • 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
    • F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
    • F16H61/448—Control circuits for tandem pumps or motors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

A single engine (10) drives two hydraulic pumps (12, 14) which power separate hydraulic circuits. The outputs of the pumps are controlled by ganged controls (15). Every wheel is fitted with a hydraulic motor (16, 18, 20, 22) with the front and rear wheels in separate circuits. The hydraulic motors, being coupled in parallel, operate with a differential effect to deliver the same torque on each wheel. The front and rear circuits are coupled by special flow restriction valves (31, 32) which allow a set flow between circuits without affecting the pressures in the circuits. The valves are effective in either direction.
FR7525006A 1974-08-12 1975-08-11 Four wheel hydraulic drive - with separate front and rear hydraulic circuits joined by flow restrictions Granted FR2282073A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49679174A 1974-08-12 1974-08-12

Publications (2)

Publication Number Publication Date
FR2282073A1 true FR2282073A1 (en) 1976-03-12
FR2282073B3 FR2282073B3 (en) 1978-04-07

Family

ID=23974150

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7525006A Granted FR2282073A1 (en) 1974-08-12 1975-08-11 Four wheel hydraulic drive - with separate front and rear hydraulic circuits joined by flow restrictions

Country Status (2)

Country Link
DE (1) DE2535762A1 (en)
FR (1) FR2282073A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741130A1 (en) * 1996-03-29 1997-05-16 Poclain Hydraulics Sa Hydrostatic transmission with two hydraulic pumps and pairs of hydraulic motors for engine
ES2152148A1 (en) * 1998-03-25 2001-01-16 Multitor S A Hydrostatic propulsion system for dumpers and the like

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120021A1 (en) * 1982-09-29 1984-10-03 ZF FRIEDRICHSHAFEN Aktiengesellschaft Hydrostatic driving device
DE8712383U1 (en) * 1987-09-12 1987-12-10 Valmet Oy, Helsinki vehicle
JPH01108467A (en) * 1987-10-22 1989-04-25 Honda Motor Co Ltd Controller for continuously variable hydraulic transmission of vehicle
CN104154201B (en) * 2013-05-13 2018-03-16 林德液压两合公司 Hydrostatic running driving device for a11wheel drive working machine
CN103600655B (en) * 2013-11-22 2017-02-08 华南农业大学 Front axle swinging type four-wheel drive chassis steering system for paddy fields

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741130A1 (en) * 1996-03-29 1997-05-16 Poclain Hydraulics Sa Hydrostatic transmission with two hydraulic pumps and pairs of hydraulic motors for engine
ES2152148A1 (en) * 1998-03-25 2001-01-16 Multitor S A Hydrostatic propulsion system for dumpers and the like

Also Published As

Publication number Publication date
FR2282073B3 (en) 1978-04-07
DE2535762A1 (en) 1976-02-26

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Legal Events

Date Code Title Description
ST Notification of lapse