JPS5673249A - Controller for transmission - Google Patents

Controller for transmission

Info

Publication number
JPS5673249A
JPS5673249A JP14994279A JP14994279A JPS5673249A JP S5673249 A JPS5673249 A JP S5673249A JP 14994279 A JP14994279 A JP 14994279A JP 14994279 A JP14994279 A JP 14994279A JP S5673249 A JPS5673249 A JP S5673249A
Authority
JP
Japan
Prior art keywords
valves
speed change
gradually increasing
clutch
shift
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.)
Pending
Application number
JP14994279A
Other languages
Japanese (ja)
Inventor
Hikoichiro Takakuwa
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP14994279A priority Critical patent/JPS5673249A/en
Publication of JPS5673249A publication Critical patent/JPS5673249A/en
Pending 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
    • F16H61/02—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 characterised by the signals used
    • F16H61/0202—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 characterised by the signals used the signals being electric
    • F16H61/0204—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 characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
    • F16H61/0206—Layout of electro-hydraulic control circuits, e.g. arrangement of valves
    • F16H2061/0209—Layout of electro-hydraulic control circuits, e.g. arrangement of valves with independent solenoid valves modulating the pressure individually for each clutch or brake
    • 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
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures

Landscapes

  • Gear-Shifting Mechanisms (AREA)

Abstract

PURPOSE: To prevent the double connection of speed change clutches and enable the optimum pressure control by a mechanism wherein shift valves and fluid gradually increasing valves are mounted between each of an oil pressure pump and a plurality of clutch cylinders while the cylinders are controlled by means of logic valves.
CONSTITUTION: An oil pressure pump 7 and lowWthird and forward and backing each clutch cylinder 3aW3e are each connected through fluid pressure gradually increasing valves 4aW4e with shift valves 1aW1e. Logic valves 6aW6c, which open and close a modulate load circuit in response to the functioning of each shift valve 1aW1e and control only one speed change clutch cylinder 3aW3e to a connection condition, are installed into the modulate load circuit of each fluid gradually increasing valve 4aW4e. Thus, the double connection of the speed change clutches can be prevented, and the optimum clutch gradually increasing pressure at each speed change can be set.
COPYRIGHT: (C)1981,JPO&Japio
JP14994279A 1979-11-21 1979-11-21 Controller for transmission Pending JPS5673249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14994279A JPS5673249A (en) 1979-11-21 1979-11-21 Controller for transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14994279A JPS5673249A (en) 1979-11-21 1979-11-21 Controller for transmission

Publications (1)

Publication Number Publication Date
JPS5673249A true JPS5673249A (en) 1981-06-17

Family

ID=15485932

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14994279A Pending JPS5673249A (en) 1979-11-21 1979-11-21 Controller for transmission

Country Status (1)

Country Link
JP (1) JPS5673249A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6084850U (en) * 1983-11-18 1985-06-11 株式会社小松製作所 Hydraulic control device for hydraulically controlled transmissions
JPS60147845U (en) * 1984-03-12 1985-10-01 株式会社小松製作所 Hydraulic circuit of hydraulically operated transmission
US5277671A (en) * 1991-10-03 1994-01-11 Mercedes-Benz Ag Hydraulic control of epicyclic-type change-speed gearbox
EP0900955A1 (en) * 1997-09-04 1999-03-10 Deere & Company Control device with hydraulic feedback for powershift transmissions

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6084850U (en) * 1983-11-18 1985-06-11 株式会社小松製作所 Hydraulic control device for hydraulically controlled transmissions
JPS60147845U (en) * 1984-03-12 1985-10-01 株式会社小松製作所 Hydraulic circuit of hydraulically operated transmission
JPH0144844Y2 (en) * 1984-03-12 1989-12-25
US5277671A (en) * 1991-10-03 1994-01-11 Mercedes-Benz Ag Hydraulic control of epicyclic-type change-speed gearbox
EP0900955A1 (en) * 1997-09-04 1999-03-10 Deere & Company Control device with hydraulic feedback for powershift transmissions

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