GB1516289A - Hydraulic device for producing a pressure proportional to a rotational speed - Google Patents

Hydraulic device for producing a pressure proportional to a rotational speed

Info

Publication number
GB1516289A
GB1516289A GB53177A GB53177A GB1516289A GB 1516289 A GB1516289 A GB 1516289A GB 53177 A GB53177 A GB 53177A GB 53177 A GB53177 A GB 53177A GB 1516289 A GB1516289 A GB 1516289A
Authority
GB
United Kingdom
Prior art keywords
speed
throttles
pressure
throttle
producing
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.)
Expired
Application number
GB53177A
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
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 ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB1516289A publication Critical patent/GB1516289A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B5/00Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities

Landscapes

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

Abstract

1516289 Change-speed gear control ZAHNRADFABRIK FRIEDRICHSHAFEN AG 7 Jan 1977 [9 Jan 1976] 00531/77 Heading F2D An hydraulic system for producing a pressure proportional to speed comprises a pump 10, whose output is proportional to speed, the flow from pump 10 passing through at least two throttles 19, 20 connected in series each throttle being in parallel with a respective valve which opens when the pressure drop across the throttle exceeds a respective predetermined value. In the arrangement shown in Fig. 1 the throttles 19, 20 are holes in valve discs 17, 18 respectively which are closed by springs 21, 22 respectively. Hole 19 is smaller than hole 20 and spring 21 weaker than spring 22. The control pressure produced in line 11, which may control an automatic transmission such as a change-underload type or a hydrostatic transmission, is usable over a greater range of speed than would be possible with a single throttle only. There may be three or more throttles, each with a respective pressure-operated valve in parallel (Fig. 6, not shown).
GB53177A 1976-01-09 1977-01-07 Hydraulic device for producing a pressure proportional to a rotational speed Expired GB1516289A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762600644 DE2600644C3 (en) 1976-01-09 1976-01-09 Hydraulic device for generating a pressure proportional to a speed

Publications (1)

Publication Number Publication Date
GB1516289A true GB1516289A (en) 1978-07-05

Family

ID=5967204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB53177A Expired GB1516289A (en) 1976-01-09 1977-01-07 Hydraulic device for producing a pressure proportional to a rotational speed

Country Status (4)

Country Link
DE (1) DE2600644C3 (en)
FR (1) FR2337827A1 (en)
GB (1) GB1516289A (en)
IT (1) IT1077947B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359046A (en) 1979-07-09 1982-11-16 Shaw Jr Seth T IUD Arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041873C2 (en) * 1980-11-06 1982-12-23 Danfoss A/S, 6430 Nordborg Device for generating a speed-dependent control pressure

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1044622B (en) * 1956-12-04 1958-11-20 Zahnradfabrik Friedrichshafen Pressure control device
DE1555480B2 (en) * 1965-07-17 1976-03-11 Linde Ag, 6200 Wiesbaden CONTROL DEVICE FOR A HYDROSTATIC TRANSMISSION IN PARTICULAR FOR MOTOR VEHICLES
DE1243437B (en) * 1965-12-07 1967-06-29 Daimler Benz Ag Centrifugal governor for generating a speed-dependent pressure, in particular for automatically shifting motor vehicle transmissions
US3431928A (en) * 1966-10-12 1969-03-11 Ford Motor Co Multiple stage governor valve assembly for establishing a speed-pressure signal
DE2008078A1 (en) * 1970-02-21 1971-09-23 Brüninghaus Hydraulik GmbH, 7240 Horb Control device for a hydrostatic drive
DE2104362B2 (en) * 1971-01-30 1974-01-31 Friedrich Dipl.-Ing. 4680 Wanne-Eickel Schwing Pressure relief valve for setting the rate of pressure increase in hydraulic systems
JPS55762B2 (en) * 1971-11-05 1980-01-10
US3943956A (en) * 1972-07-04 1976-03-16 Borg-Warner Limited Hydraulic governors
DE2251536C3 (en) * 1972-10-20 1984-09-20 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Control and regulating device for a continuously adjustable hydrostatic transmission for vehicles, especially for forklifts, shovel loaders or the like.
DE2413273C3 (en) * 1974-03-20 1981-07-09 Robert Bosch Gmbh, 7000 Stuttgart Pressure reducing valve
DE2543195A1 (en) * 1974-11-29 1976-08-12 Ford Werke Ag TWO-STAGE SPEED PRESSURE REGULATOR FOR AUTOMATIC VEHICLE TRANSMISSIONS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359046A (en) 1979-07-09 1982-11-16 Shaw Jr Seth T IUD Arrangement

Also Published As

Publication number Publication date
FR2337827A1 (en) 1977-08-05
FR2337827B1 (en) 1981-01-30
DE2600644B2 (en) 1980-06-12
DE2600644A1 (en) 1977-07-14
DE2600644C3 (en) 1984-05-30
IT1077947B (en) 1985-05-04

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee