GB2077865A - Pressure modulating valve - Google Patents

Pressure modulating valve

Info

Publication number
GB2077865A
GB2077865A GB8111071A GB8111071A GB2077865A GB 2077865 A GB2077865 A GB 2077865A GB 8111071 A GB8111071 A GB 8111071A GB 8111071 A GB8111071 A GB 8111071A GB 2077865 A GB2077865 A GB 2077865A
Authority
GB
United Kingdom
Prior art keywords
fluid
valve
hydraulic
clutches
location
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Withdrawn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
GB8111071A
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor 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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of GB2077865A publication Critical patent/GB2077865A/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Withdrawn legal-status Critical Current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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/065—Smoothing ratio shift by controlling rate of change of fluid pressure using fluid control means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

A pressure modulating valve (28) has a principal use for retrofitting into an original hydraulic system (10) to modulate the fluid pressure from a source (11) of hydraulic fluid to hydraulic clutches (50, 52) in a transmission (54). In prior art valves, the routing of hydraulic fluid from the original system to the valve involved the connection of many lines. The present invention is connected to the source (11) at only one location and discharges fluid to the clutches from said location. The valve (28) is operated by the fluid provided at the one location without the need to route fluid around the valve (28) to the various components thereof. The valve (28) also modulates the fluid supplied to the clutches from a low pressure to a high pressure to provide smooth clutch engagement.
GB8111071A 1979-12-14 1979-12-14 Pressure modulating valve Withdrawn GB2077865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1979/001129 WO1981001733A1 (en) 1979-12-14 1979-12-14 Pressure modulating valve

Publications (1)

Publication Number Publication Date
GB2077865A true GB2077865A (en) 1981-12-23

Family

ID=22147836

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8111071A Withdrawn GB2077865A (en) 1979-12-14 1979-12-14 Pressure modulating valve

Country Status (3)

Country Link
JP (1) JPS56501768A (en)
GB (1) GB2077865A (en)
WO (1) WO1981001733A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2149270B1 (en) * 1971-08-13 1974-03-29 Citroen Sa
US3739807A (en) * 1972-03-27 1973-06-19 Gen Motors Corp Valving arrangement
GB1535175A (en) * 1974-11-18 1978-12-06 Massey Ferguson Services Nv Hydraulic valves
US3960172A (en) * 1975-01-14 1976-06-01 Caterpillar Tractor Co. Cartridge modulating valve

Also Published As

Publication number Publication date
WO1981001733A1 (en) 1981-06-25
JPS56501768A (en) 1981-12-03

Similar Documents

Publication Publication Date Title
JPS56138553A (en) Hydraulic pressure controlling apparatus for automatic transmission for vehicle
ES8302864A1 (en) Hydraulic distributor with reaction on the control member.
FI832673A (en) ANORDINATION FOR LED CONNECTION WITH DIFFERENTIAL TRACTION EQUIPMENT
DE3173697D1 (en) A district hot water supply system
ES8600476A1 (en) Cooling fluid circuit for engageable and disengageable clutches, especially for vehicles
ES2085109T3 (en) METHOD AND CONTROL SYSTEM OF THE RANGE SECTION ACTUATOR TO PREVENT THE DETERIORATION OR FAILURE OF THE RANGE SECTION SYNCHRONIZERS.
SE7903342L (en) CONNECTION VALVE FOR PRESSURE SATURATION
GB2292196A (en) Hydraulic actuating systems
GB2077865A (en) Pressure modulating valve
AU6065390A (en) Pipe connection for advance working pipes laid underground by an advance working technique
DK303284A (en) HYDRAULIC CLUTCH FOR A WASHER CONTAINER TO A BRAKE CYLINDER OF A VEHICLE
SE8503617D0 (en) STEERING BLOCK FOR THE MODULATION OF BRAKE PRESSURES IN A BLOCKIERSCHUTZ ESTABLISHMENT OF KRAFTFAHRZEUGEN
SE8305214L (en) PRESSURE SUPPLY DEVICE FOR TWO CONSUMERS
JPS5471262A (en) Controlling device in oil pressure device
ATE183270T1 (en) HYDRAULIC ACTUATED LOCKING DEVICE FOR QUICK COUPLERS ON CONSTRUCTION AND WORK MACHINERY
ES483582A1 (en) Device for detachably coupling a branchline to a pressure line
FR2445251B1 (en)
JPS56134656A (en) Controller for oil pressure of automatic transmission
ES8504349A1 (en) Switching device for a cooler for hydraulic fluids.
SE8300434D0 (en) PNEUMATIC BRAKE SYSTEM FOR TRAILERS
SE8202384L (en) HYDRAULIC DEVICE FOR MANAGING GAS SHIFT VALVES
JPS56164205A (en) Hydraulic pressure circuit for hydraulic-pressure-operated apparatus
JPS5733051A (en) Braking device of trailer
ES2013460A6 (en) Arrangement for obtaining branches off from a water pipe in service
GB2006135A (en) Power steering

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)