GB982173A - Vehicle transmission mechanism - Google Patents

Vehicle transmission mechanism

Info

Publication number
GB982173A
GB982173A GB2064860A GB2064860A GB982173A GB 982173 A GB982173 A GB 982173A GB 2064860 A GB2064860 A GB 2064860A GB 2064860 A GB2064860 A GB 2064860A GB 982173 A GB982173 A GB 982173A
Authority
GB
United Kingdom
Prior art keywords
valve
engine
vehicle
speed ratio
motor
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
GB2064860A
Inventor
John Smith Deakin
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Joseph Lucas Industries 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 Industries Ltd, Joseph Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB2064860A priority Critical patent/GB982173A/en
Publication of GB982173A publication Critical patent/GB982173A/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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4157—Control of braking, e.g. preventing pump over-speeding when motor acts as a pump
    • 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
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/46—Automatic regulation in accordance with output requirements
    • F16H61/465—Automatic regulation in accordance with output requirements for achieving a target input speed

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Gearings (AREA)

Abstract

982,173. Vehicle fluid transmission systems. JOSEPH LUCAS (INDUSTRIES) Ltd. June 12, 1961 [June 13, 1960], No. 20648/60. Heading B7H. A vehicle transmission has an engine-driven swash-plate pump 5 supplying pressure liquid to a motor 6 for driving the wheels of the vehicle, liquid actuated means 7, 8 vary the stroke of the pump and/or motor automatically to accord with the load on the motor, and a driver operable valve 16 in series with an engine speed responsive valve 10, whereby on valve 16 being actuated when engine speed is below a predetermined value, the means 7, 8 is operated to lower the speed ratio between the engine and the vehicle. Chambers on either side of diaphragm 18 in valve 10 are connected directly and via choke 19, respectively, to engine-driven pump 21, a valve 12, 13 connected to the diaphragm being biased open by spring 14. A variable restriction 22 is set by accelerator pedal 23. In Fig. 1, with engine speed below the predetermined value, valve 12, 13 opens and on braking of the vehicle valve 16 opens and fluid flows from cylinder 8 to decrease the speed ratio until piston 7 closes port 9 to aid braking. The lowest speed ratio to which the transmission can be set can be selected by using a series of ports 9, 9a, 9b, 9c, and a manual valve 25, which can replace valve 16 if all the ports can be closed by valve 25. In Fig. 2, on braking a second brake valve 30 connects valve 10 to valve 31 connected to reservoir 17 via port 33. A pivoted lever 34 biased by spring 42 to open inlet 32, is acted upon by pistons 37, 38 connected by pipes 39, 40, respectively, to the line between the inlet of pump 5 and outlet of motor 6 and to a cylinder operated by brake pedal 41. Pressure rises in pipe 39 when motor 6 tends to drive pump 5. For a given brake pressure, valve 32 is opened to reduce the speed ratio until the forces on lever 34 balance. Hence if the torque transmitted from the wheels to the engine is high, the valve 31 closes to stop further speed ratio reduction at a lower pedal pressure as compared with instances when the torque transmitted to the engine is low. A valve 44 operated from the hand brake lowers the speed ratio on application of the hand brake with the vehicle speed below a predetermined value.
GB2064860A 1960-06-13 1960-06-13 Vehicle transmission mechanism Expired GB982173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2064860A GB982173A (en) 1960-06-13 1960-06-13 Vehicle transmission mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2064860A GB982173A (en) 1960-06-13 1960-06-13 Vehicle transmission mechanism

Publications (1)

Publication Number Publication Date
GB982173A true GB982173A (en) 1965-02-03

Family

ID=10149383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2064860A Expired GB982173A (en) 1960-06-13 1960-06-13 Vehicle transmission mechanism

Country Status (1)

Country Link
GB (1) GB982173A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10732645B2 (en) 2011-07-06 2020-08-04 Peloton Technology, Inc. Methods and systems for semi-autonomous vehicular convoys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10732645B2 (en) 2011-07-06 2020-08-04 Peloton Technology, Inc. Methods and systems for semi-autonomous vehicular convoys

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