US3450144A - Plural independent signal producing hydraulic governor - Google Patents

Plural independent signal producing hydraulic governor Download PDF

Info

Publication number
US3450144A
US3450144A US580731A US3450144DA US3450144A US 3450144 A US3450144 A US 3450144A US 580731 A US580731 A US 580731A US 3450144D A US3450144D A US 3450144DA US 3450144 A US3450144 A US 3450144A
Authority
US
United States
Prior art keywords
pressure
spool
governor
valve
speed
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 - Lifetime
Application number
US580731A
Other languages
English (en)
Inventor
Joachim Horsch
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
Application granted granted Critical
Publication of US3450144A publication Critical patent/US3450144A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
    • 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
    • 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
    • F16H2710/00—Control devices for speed-change mechanisms, the speed change control is dependent on function parameters of the gearing
    • F16H2710/16—Control devices for speed-change mechanisms, the speed change control is dependent on function parameters of the gearing the gearing is not described or not essential
    • F16H2710/20—Control devices for speed-change mechanisms, the speed change control is dependent on function parameters of the gearing the gearing is not described or not essential the control being hydraulic or pneumatic
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/0971—Speed responsive valve control
    • Y10T137/108—Centrifugal mass type [exclusive of liquid]
    • Y10T137/1098—With multiple valves
    • 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
    • Y10T137/00—Fluid handling
    • Y10T137/0971—Speed responsive valve control
    • Y10T137/108—Centrifugal mass type [exclusive of liquid]
    • Y10T137/1135—Rotating valve and rotating governor

Definitions

  • a centrifugal force hydraulically operated governor produces a plurality of independent signals in response to rotational speed wherein each signal produced can be utilized to provide a pressure-speed curve the pressure value of which extends over the same range for each curve.
  • This invention relates to a centrifugal force operated hydraulic governor.
  • the invention further relates to a governor capable of producing a plurality of independent signals in response to rotational speed. More particularly the invention relates to a centrifugal force operated hydraulic governor wherein each signal produced can be utilized to provide a pressure speed curve whose pressure value extends over the entire range of hydraulic pressure available to the governor system.
  • each signal produced can be utilized to provide a pressure speed curve whose pressure value extends over the entire range of hydraulic pressure available to the governor system.
  • FIG. 1 is a longitudinal sectional view of a governor device according to the invention
  • FIG. 2 is a cross-sectional view taken on the line IIH of FIG. 1;
  • FIG. 3 is an end view taken on the line IIIIII of FIG. 1;
  • the basic component Patented June 17, 1969 of the governor comprises a cylindrical housing 10 which is supported through bushings 12, 13 and 14 by a fixed stub shaft 16.
  • the cylindrical housing 10 is attached to rotatable adapter 18 by bolts .19 or the like.
  • the adapter 18 is provided with a gear 20 integrally formed thereon which meshes with an idler gear 22.
  • the idler gear 22 is driven by a gear (not shown) which latter gear is driven from the output shaft of a motor vehicle power transmission unit.
  • Formed in the housing or valve body 10 are a plurality of bores 26. Each bore 26 slidably receives a spool 28a, 28b and 280 for relative radial movement therein.
  • Each of spools 28a, 28b and 28c is of the same general configuration but of difi'erent weight or mass and having different reaction areas so as to move radially out wardly to regulate different pressure levels due to the centrifugal force created upon rotation of the housing 10.
  • Each spool has an external annular groove 30 which communicates via port means 34 with an internal cavity 32 formed therein.
  • the radially outermost portion of each bore 26 contains an insert 38 which is retained in place by a snap ring 40.
  • the cavities 32 of spools 28a and 28b are closed off at their radially outer ends by means of reaction plungers 42 which are bottomed against their respective inserts 38.
  • reaction plunger could also be provided for spool 280 but in the preferred embodiment the fluid pressure in cavity 32 thereof reacts directly between spool 28c and insert 38 which seals off the end of bore 26.
  • the mass of the various spools may be more finely adjusted by means of removable washers 46 which are held in place by snap rings 47.
  • stub shaft 16 is fixed to a manifold 23 which has an internal conduit 24 associated therewith.
  • the conduit 24 communicates with a conduit 25 formed intern-ally of the stub shaft 16 so that a substantially constant pressure fluid, herein denoted line pressure, can be supplied to the plurality of valve bores 26.
  • the line pressure communicates with valve bores 26 by way of annular groove 48, bushing holes 49 and pressure fluid inlets 50.
  • each of the fluid outlet passages 51 extends through body member I10 to one of the annular grooves 55 which communicates through one of the bushing ports 57 with one of the plurality of bores 59 formed in the downstream end of stub shaft 16.
  • the manifold conduit 24 is connected to some source of pressurized fluid which may be from the transmission controls or in the case of a motor vehicle power transmission unit is usually a pump driven by the transmission input and/ or output shafts. Conduit 24 is thus usually pressurized with a pressure fluid of substantially constant pressure regardless of the operating speed of the associated pump. In any event, fluid under pressure is directed through passage 24 into passage 25- of the stub shaft 16. From passage 25 it flows into the annular groove 48 through holes 49 of the bushing 13 into fluid inlet passages 50 which communicate with the valve bores 26.
  • valves 28a, 28b and 280 will cause them to progressively move outwardly which movement will open fluid inlets 50 to annular grooves 30 so that pressure fluid will be directed through ports 34 of the valve spools and thence into the respective spool cavities 32.
  • a force equilibrium on the spools will be established such that the pressure in the respective cavities 32 multiplied by the reaction area of the particular plunger 42 (insert 38 in the case of valve spool 28c) is equal to the centrifugal force acting on the valve spool in question.
  • the pressure in any given spool cavity 32 is a function of the rotational speed of the transmission output shaft (centrifugal force) and fixed design parameters of the particular valve spool such as its size, weight, reaction area, etc.
  • any one of the plurality of valve spools is the resultant of two simultaneously acting, opposed, radially directed forces that cause the particular spool to function as a pressure regulating valve.
  • the spool reciprocates radially until an equilibrium is established between the forces acting thereon for each speed of the transmission output shaft.
  • the valve spools are positioned as shown in FIGS. 1 and 2.
  • the pressure of the fluid in cavity 32 is directly proportional to the speed of the transmission shaft and this pressurized fluid in cavity 32 and outlet conduits 51, 59 and 61 is denoted governor pressure.
  • this governor pressure can be used to operate any sort of pressure responsive device resulting in a shaft speed responsive system.
  • the use of a governor having multiple valve spools as disclosed herein provides optimum pressure-speed curves in the gear shifting ranges wherein a small change in r.p.m. value results in a relatively large change in pressure value.
  • the particular pressure responsive means controlled by the governor may be less sensitive. For example, where the governor is used to control transmission shift points, as previously described, less sensitive selector valves are required to sense the change in pressure which ultimately results in a transmission shift.
  • a centrifugal force hydraulically operated governor for producing a plurality of independent signals in response to rotational speed, wherein each signal produced can be utilized to provide a pressure-speed curve the pressure value of which extends over the same range for each curve, said governor adapted to be mounted on a rotatable member and comprising:
  • valve body provided with a plurality of radially outwardly extending bores
  • each of said spools having an internal cavity formed therein;
  • each pressure fluid inlet communicating common pressure fluid of the same pressure value to said bores;
  • each said bore having an independent pressure fluid outlet
  • each said spool being arranged in said bore to reciprocate across said pressure fluid inlet and control 5 6 the admission of pressure fluid to said bore and claim 1 wherein each said spool is provided with resaid spool cavity; movable means for varying the mass thereof.
  • each said spool cavity having a shape which cooperates with said reaction means to provide an unbalanced References Clted area upon which the pressure fluid admitted to said 5 UNITED STATES PATENTS cavity reacts to urge said spool radially inwardly 2 73 5 3/1956 M Af 5 in opposition to the outwardly directed centrifugal 2,741 256 4 195 Barton 137 55 forces exerted on the spool due to rotation of said 2,938,502 5/1960 N l 137.46v X rotatable member; 2,941,539 6/1960 Hewko 137-56 each said spool having differing design parameters for 10 3,194,252 7/1965 Locher 137-56 X producing a differing predetermined pressure in the 3,196,889 7/1965 Hims 137-56 cavity of said spool in response to a predetermined 3, ,77 12/1965 LOndal 137-56 X rotational velocity of said rotatable member; and, vent means connected to each said

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Fluid Gearings (AREA)
US580731A 1966-09-20 1966-09-20 Plural independent signal producing hydraulic governor Expired - Lifetime US3450144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58073166A 1966-09-20 1966-09-20

Publications (1)

Publication Number Publication Date
US3450144A true US3450144A (en) 1969-06-17

Family

ID=24322306

Family Applications (1)

Application Number Title Priority Date Filing Date
US580731A Expired - Lifetime US3450144A (en) 1966-09-20 1966-09-20 Plural independent signal producing hydraulic governor

Country Status (4)

Country Link
US (1) US3450144A (de)
BE (1) BE704061A (de)
DE (1) DE1673369B2 (de)
GB (1) GB1170327A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584634A (en) * 1970-01-13 1971-06-15 Ford Motor Co Labyrinth seal for a governor valve assembly in an automatic power transmission mechanism
US3789863A (en) * 1971-07-14 1974-02-05 Nissan Motor Fluid pressure governor valve
US4194520A (en) * 1978-04-24 1980-03-25 Chrysler Corporation Two stage hydraulic governor
CN112817347A (zh) * 2020-12-25 2021-05-18 北京京仪自动化装备技术有限公司 一种快速升降温系统及其控制方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738650A (en) * 1952-12-05 1956-03-20 Int Harvester Co Fluid pressure modulating device
US2741256A (en) * 1954-11-19 1956-04-10 Ford Motor Co Turbine governor
US2938502A (en) * 1958-11-20 1960-05-31 Westinghouse Electric Corp Centrifugal control mechanism
US2941539A (en) * 1958-06-10 1960-06-21 Gen Motors Corp Governor
US3194252A (en) * 1961-05-22 1965-07-13 Holley Carburetor Co Hydraulic speed governor with manual control
US3196889A (en) * 1961-04-21 1965-07-27 Parsons & Marine Eng Turbine Overspeed governors
US3225778A (en) * 1961-11-06 1965-12-28 Holley Carburetor Co Hydraulic resistors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738650A (en) * 1952-12-05 1956-03-20 Int Harvester Co Fluid pressure modulating device
US2741256A (en) * 1954-11-19 1956-04-10 Ford Motor Co Turbine governor
US2941539A (en) * 1958-06-10 1960-06-21 Gen Motors Corp Governor
US2938502A (en) * 1958-11-20 1960-05-31 Westinghouse Electric Corp Centrifugal control mechanism
US3196889A (en) * 1961-04-21 1965-07-27 Parsons & Marine Eng Turbine Overspeed governors
US3194252A (en) * 1961-05-22 1965-07-13 Holley Carburetor Co Hydraulic speed governor with manual control
US3225778A (en) * 1961-11-06 1965-12-28 Holley Carburetor Co Hydraulic resistors

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3584634A (en) * 1970-01-13 1971-06-15 Ford Motor Co Labyrinth seal for a governor valve assembly in an automatic power transmission mechanism
US3789863A (en) * 1971-07-14 1974-02-05 Nissan Motor Fluid pressure governor valve
US4194520A (en) * 1978-04-24 1980-03-25 Chrysler Corporation Two stage hydraulic governor
CN112817347A (zh) * 2020-12-25 2021-05-18 北京京仪自动化装备技术有限公司 一种快速升降温系统及其控制方法
CN112817347B (zh) * 2020-12-25 2022-05-24 北京京仪自动化装备技术股份有限公司 一种快速升降温系统及其控制方法

Also Published As

Publication number Publication date
DE1673369B2 (de) 1976-12-23
GB1170327A (en) 1969-11-12
BE704061A (de) 1968-02-01
DE1673369A1 (de) 1971-07-01

Similar Documents

Publication Publication Date Title
US3280646A (en) Control system for an infinitely variable speed friction drive
US2691268A (en) Fuel and speed control apparatus for internal-combustion engines
US4565110A (en) Hydraulic apparatus for a continuously variable transmission
US3018041A (en) Hydraulic function generator
US2364817A (en) Regulating device
SE439342C (sv) Ventilanordning för styrning av en linjär eller roterande hydraulmotor
US3941016A (en) Load and speed dependent gear change hydraulic pressure generator
US3450144A (en) Plural independent signal producing hydraulic governor
US3202012A (en) Infinitely variable power transmission control system
US3393692A (en) Rotary shaft speed control
US3958466A (en) Electro-hydraulic gear shifting control for vehicle gears
US3241533A (en) Governor system
US2995898A (en) Fluid operated governor
US2500618A (en) Liquid control apparatus
US3566894A (en) Hydraulic pressure governor valve
US2715892A (en) Hydraulic governor regulating means
US3265081A (en) Centrifugal fluid pressure governor assembly
US4033368A (en) Governor pressure control apparatus for vehicle automatic transmission
US4378200A (en) Power transmission
US3642014A (en) Compound governor valve mechanism
US3511052A (en) Load dividing control for multiple engine drive
US3485042A (en) Gas turbine control system
US3703810A (en) Speed control apparatus
US2941539A (en) Governor
US3486329A (en) Control system for gas turbine/transmission power train