GB801787A - Improvements in or relating to change-speed transmission control system - Google Patents

Improvements in or relating to change-speed transmission control system

Info

Publication number
GB801787A
GB801787A GB6146/56A GB614656A GB801787A GB 801787 A GB801787 A GB 801787A GB 6146/56 A GB6146/56 A GB 6146/56A GB 614656 A GB614656 A GB 614656A GB 801787 A GB801787 A GB 801787A
Authority
GB
United Kingdom
Prior art keywords
switch
speed
accelerator
windings
governor
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
Application number
GB6146/56A
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.)
Studebaker Packard Corp
Original Assignee
Studebaker Packard 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 Studebaker Packard Corp filed Critical Studebaker Packard Corp
Publication of GB801787A publication Critical patent/GB801787A/en
Expired 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
    • F16H61/0211—Layout of electro-hydraulic control circuits, e.g. arrangement of valves characterised by low integration or small number of valves

Landscapes

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

Abstract

801,787. Change-speed control. STUDEBAKER-PACKARD CORPORATION. Feb. 28, 1956 [Aug. 3, 1955], No. 6146/56. Class 80 (2). A relay switch 106, closure of which opens a solenoid valve 88 to supply pressure fluid 76 to a piston 60 for upshifting an auxiliary two-speed gear on a vehicle, has two similar windings W in branch circuits including switches SW4, SW3 respectively closed by an output-driven governor above a predetermined vehicle speed, and by release of the usual accelerator pedal 34, the windings W being such that both must be energized together to actuate the relay switch 106, which latter then remains actuated by continued energization of either winding alone. Thus, upshift to direct- (or over-) drive requires accelerator release above the predetermined closure speed of the governor switch SW4, whilst return downshift does not occur on decelerating below the governor-switch opening speed unless the accelerator is partly depressed from its full release position to open the switch SW3. Accelerator kickdown shift is possible at any time by opening a kickdown switch SW5 in the common feed of both windings W, such feed also including the usual engine ignition switch SW1, and an upshift lock-out switch SW2. The two-speed planetary gear and its hydraulic control are the same as those in Specification 801,549.
GB6146/56A 1955-08-03 1956-02-28 Improvements in or relating to change-speed transmission control system Expired GB801787A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US801787XA 1955-08-03 1955-08-03

Publications (1)

Publication Number Publication Date
GB801787A true GB801787A (en) 1958-09-24

Family

ID=22155752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6146/56A Expired GB801787A (en) 1955-08-03 1956-02-28 Improvements in or relating to change-speed transmission control system

Country Status (1)

Country Link
GB (1) GB801787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236890B (en) * 1961-06-09 1967-03-16 Auto Transmissions Ltd Additional planetary gear change gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236890B (en) * 1961-06-09 1967-03-16 Auto Transmissions Ltd Additional planetary gear change gear

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