JPS57101155A - Hydraulic control unit for automatic transmission - Google Patents

Hydraulic control unit for automatic transmission

Info

Publication number
JPS57101155A
JPS57101155A JP55176993A JP17699380A JPS57101155A JP S57101155 A JPS57101155 A JP S57101155A JP 55176993 A JP55176993 A JP 55176993A JP 17699380 A JP17699380 A JP 17699380A JP S57101155 A JPS57101155 A JP S57101155A
Authority
JP
Japan
Prior art keywords
oil pressure
gear shift
operating condition
time
control valve
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
JP55176993A
Other languages
Japanese (ja)
Inventor
Takeo Hiramatsu
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP55176993A priority Critical patent/JPS57101155A/en
Publication of JPS57101155A publication Critical patent/JPS57101155A/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
    • F16H61/04—Smoothing ratio shift
    • F16H61/06—Smoothing ratio shift by controlling rate of change of fluid pressure
    • F16H61/061—Smoothing ratio shift by controlling rate of change of fluid pressure using electric control means
    • 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
    • F16H59/00—Control inputs to control units of change-speed- or reversing-gearings for conveying rotary motion
    • F16H59/36—Inputs being a function of speed
    • F16H59/46—Inputs being a function of speed dependent on a comparison between speeds

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

PURPOSE:To reduce shock of gear shift by providing a low oil pressure corresponding to the operating condition for the short period of gear shift when it is detected that relative rotation of a pair of friction elements comes to a stop. CONSTITUTION:An orifice 426, oil pressure control valve 250 and a solenoid valve 320 jointly constitute an electric oil pressure converting unit 340 which generates a controlled oil pressure corresponding to the operating condition at the time of gear shift in an oil passage 422 due to the function of the same valve 320. The solenoid valve 320 controls the time of opening and closing of an orifice 321 according to the operating condition and thus controls the oil pressure P1 acting on the pressure retaining face 251 of the oil pressure control valve 250. As a result, a low oil pressure corresponding to the operating condition is generated in the oil passage 422 by means of the oil pressure control valve 250. The time to start operation and operating period of the solenoid valve 320 are determined by signals issued by the gear shift detector unit and the coupling time detector unit, etc.
JP55176993A 1980-12-15 1980-12-15 Hydraulic control unit for automatic transmission Pending JPS57101155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55176993A JPS57101155A (en) 1980-12-15 1980-12-15 Hydraulic control unit for automatic transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55176993A JPS57101155A (en) 1980-12-15 1980-12-15 Hydraulic control unit for automatic transmission

Publications (1)

Publication Number Publication Date
JPS57101155A true JPS57101155A (en) 1982-06-23

Family

ID=16023301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55176993A Pending JPS57101155A (en) 1980-12-15 1980-12-15 Hydraulic control unit for automatic transmission

Country Status (1)

Country Link
JP (1) JPS57101155A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233547A (en) * 1986-04-01 1987-10-13 Mazda Motor Corp Controller for automatic transmission
JPS6458843A (en) * 1987-08-28 1989-03-06 Mazda Motor Hydraulic controller for automatic transmission
JPH01299350A (en) * 1988-05-25 1989-12-04 Toyota Motor Corp Device for controlling shifting of automatic transmission
JPH0337472A (en) * 1989-06-30 1991-02-18 Mazda Motor Corp Line pressure control device of automatic transmission

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233547A (en) * 1986-04-01 1987-10-13 Mazda Motor Corp Controller for automatic transmission
JPS6458843A (en) * 1987-08-28 1989-03-06 Mazda Motor Hydraulic controller for automatic transmission
JPH01299350A (en) * 1988-05-25 1989-12-04 Toyota Motor Corp Device for controlling shifting of automatic transmission
JPH0337472A (en) * 1989-06-30 1991-02-18 Mazda Motor Corp Line pressure control device of automatic transmission

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