FR2278021A1 - Hydraulic control for automatic gear box - with electro-magnetic valve to regulate hydraulic servo pressure - Google Patents

Hydraulic control for automatic gear box - with electro-magnetic valve to regulate hydraulic servo pressure

Info

Publication number
FR2278021A1
FR2278021A1 FR7521603A FR7521603A FR2278021A1 FR 2278021 A1 FR2278021 A1 FR 2278021A1 FR 7521603 A FR7521603 A FR 7521603A FR 7521603 A FR7521603 A FR 7521603A FR 2278021 A1 FR2278021 A1 FR 2278021A1
Authority
FR
France
Prior art keywords
electro
gear box
magnetic valve
automatic gear
servo pressure
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Withdrawn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
FR7521603A
Other languages
French (fr)
Inventor
Nicholas Tyers Parsons
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co 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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Publication of FR2278021A1 publication Critical patent/FR2278021A1/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Withdrawn legal-status Critical Current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
    • F16H61/02—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
    • F16H61/0251—Elements specially adapted for electric control units, e.g. valves for converting electrical signals to fluid signals
    • 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
    • F16H61/0021—Generation or control of line pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The gear change of the automatic transmission is controlled by a number of selective brakes operating on the epicyclic gear trains. The brakes are operated w.r.t. hydraulic pressure from a pump. To modulate the gear change positions, and in order to smooth out the gear change action to protect the transmission components and provide a more comfortable ride, the output from the pump is modulated by an electromagnetic flap valve. The flap is pulled shut against hydraulic pressure, by the action of the solenoid. The amount of solenoid pressure is easily regulated by the control circuit.
FR7521603A 1974-07-09 1975-07-09 Hydraulic control for automatic gear box - with electro-magnetic valve to regulate hydraulic servo pressure Withdrawn FR2278021A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3031074 1974-07-09

Publications (1)

Publication Number Publication Date
FR2278021A1 true FR2278021A1 (en) 1976-02-06

Family

ID=10305627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7521603A Withdrawn FR2278021A1 (en) 1974-07-09 1975-07-09 Hydraulic control for automatic gear box - with electro-magnetic valve to regulate hydraulic servo pressure

Country Status (4)

Country Link
JP (1) JPS5131367A (en)
DE (1) DE2530484A1 (en)
FR (1) FR2278021A1 (en)
IT (1) IT1040870B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114816A1 (en) * 1982-08-04 1984-08-08 Ford Motor Co Solenoid operated pressure regulation.
FR2570521A1 (en) * 1984-09-18 1986-03-21 Renault REGULATION DEVICE WITH TWO PRESSURE DOMAINS

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110923A (en) * 1982-12-15 1984-06-27 Kawasaki Heavy Ind Ltd Hydraulic clutch connection controller for power shift type transmission

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0114816A1 (en) * 1982-08-04 1984-08-08 Ford Motor Co Solenoid operated pressure regulation.
EP0114816A4 (en) * 1982-08-04 1985-09-18 Ford Motor Co Solenoid operated pressure regulation.
FR2570521A1 (en) * 1984-09-18 1986-03-21 Renault REGULATION DEVICE WITH TWO PRESSURE DOMAINS
EP0187051A1 (en) * 1984-09-18 1986-07-09 Regie Nationale Des Usines Renault Double range pressure regulation device
US4679988A (en) * 1984-09-18 1987-07-14 Regie Nationale Des Usines Renault Two-range pressure control system

Also Published As

Publication number Publication date
DE2530484A1 (en) 1976-02-12
IT1040870B (en) 1979-12-20
JPS5131367A (en) 1976-03-17

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Legal Events

Date Code Title Description
ST Notification of lapse