GB1361881A - Vehicle drive control systems - Google Patents

Vehicle drive control systems

Info

Publication number
GB1361881A
GB1361881A GB5666171A GB5666171A GB1361881A GB 1361881 A GB1361881 A GB 1361881A GB 5666171 A GB5666171 A GB 5666171A GB 5666171 A GB5666171 A GB 5666171A GB 1361881 A GB1361881 A GB 1361881A
Authority
GB
United Kingdom
Prior art keywords
gear
ratio
counters
input
box
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
GB5666171A
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.)
FERRARI Ltd
Original Assignee
FERRARI 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 FERRARI Ltd filed Critical FERRARI Ltd
Priority to GB5666171A priority Critical patent/GB1361881A/en
Priority to DE19722258753 priority patent/DE2258753A1/en
Priority to US471903A priority patent/US3922910A/en
Publication of GB1361881A publication Critical patent/GB1361881A/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
    • F16H61/04—Smoothing ratio shift
    • F16H61/0403—Synchronisation before shifting
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/12—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts with means for synchronisation not incorporated in the clutches
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/56—Devices characterised by the use of electric or magnetic means for comparing two speeds
    • G01P3/60—Devices characterised by the use of electric or magnetic means for comparing two speeds by measuring or comparing frequency of generated currents or voltages
    • 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
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H59/40—Output shaft speed
    • 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
    • F16H59/38—Inputs being a function of speed of gearing elements
    • F16H59/42—Input shaft speed

Landscapes

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

Abstract

1361881 Controlling variable speed gearing FERRANTI Ltd 6 Dec 1972 [7 Dec 1971] 56661/71 Heading F2D A vehicle gear-box is controlled by comparator means incorporating first and second counters into which are set magnitudes the ratio between which is representative of a selected gear ratio, and first and second transducers producing signals representative of the speeds of the input and output shafts of the gear-box which signals are applied to change the magnitudes, the arrangement being such that engagement of the selected gear is permitted only if any difference between the selected ratio and the ratio of the input and output shaft speeds, expressed as a proportion of the selected ratio, is less than a predetermined maximum value. In the embodiment described, selection of a desired ratio in a seven-ratio gear-box 10 results in a signal indicative of the selected ratio being fed from one of seven outputs I ... VII to two number generating means 13, 14, each of which has a store whereby in response to a particular output I ... VII from the gear-box, it provides a digital signal, the ratio between the two digital signals being equal to the ratio of the gear selected. Transducers 16, 17 driven by the input and output shafts 11, 12 of the gear-box feed pulses at frequencies proportional to the speeds of the shafts through interface units 21, 22 to counters 19, 20. When a gear is selected a sequence counter 30 which is driven by pulses from the transducer 16 delivers a pulse from an output P to the number generating means 13, 14 to cause the digital signals from these means to be set in the counters 19, 20. The digital signals set in the counters may take into account prevailing conditions, e.g. the gear already engaged and/or the speed of the input or output shaft of the gear-box. A subsequent pulse from an output Q of the counter 30 to the counters 19, 20 causes the digital signals set in these counters to be counted down by the pulses from the transducers 16, 17 until one of the counters reaches zero when the count-down is stopped and the signal remaining in the counter 19 is fed, in binary-coded form, by way of outputs a ... h to a logic gating means 24. If this signal is such, e.g. between one and eight, as to indicate that the ratio between input and output shaft speeds lies within the limit for smooth engagement of the selected gear the gating means activates a mechanism 25 to release a latch 35 and enable the gear to be engaged. If the signal is greater than eight a mechanism 26 is activated to increase the speed of the input shaft, e.g. by adjusting a fuel injection pump of the vehicle engine, or if the signal is zero a mechanism 27 is activated to decrease the speed of the input shaft, e.g. by admitting oil under high pressure into the gear-box. When either mechanism 26 or 27 is activated, the sequence counter 30 is set to recycle. A by-pass means 40, which overrides the other parts of the control system, causes engagement of a selected gear if the speed of the output shaft, or of both the output and input shafts, as determined by a transducer 41 is below a threshold value, e.g. 10 r.p.m. The control apparatus may be embodied largely as an integrated circuit semi-conductor device.
GB5666171A 1971-12-07 1971-12-07 Vehicle drive control systems Expired GB1361881A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5666171A GB1361881A (en) 1971-12-07 1971-12-07 Vehicle drive control systems
DE19722258753 DE2258753A1 (en) 1971-12-07 1972-11-30 CONTROL ARRANGEMENT FOR VEHICLE DRIVES
US471903A US3922910A (en) 1971-12-07 1974-05-21 Means for determining the relative speeds of the input and output shafts of a gearbox

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5666171A GB1361881A (en) 1971-12-07 1971-12-07 Vehicle drive control systems

Publications (1)

Publication Number Publication Date
GB1361881A true GB1361881A (en) 1974-07-30

Family

ID=10477202

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5666171A Expired GB1361881A (en) 1971-12-07 1971-12-07 Vehicle drive control systems

Country Status (2)

Country Link
DE (1) DE2258753A1 (en)
GB (1) GB1361881A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037639A2 (en) * 1980-03-31 1981-10-14 General Motors Corporation Engine power control for automatic-shift countershaft transmission
GB2208179A (en) * 1987-06-26 1989-03-08 Aisin Aw Co Controlling engine torque to smooth transmission shift

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2534565B2 (en) * 1975-06-12 1981-09-24 Société Anonyme C.E.T.I.M., Chenée Automatic, electrically controlled switching device for a gear change transmission for vehicles
FR2417689A1 (en) * 1978-02-15 1979-09-14 Berliet Automobiles METHOD AND DEVICE FOR ELECTRONIC SYNCHRONIZATION OF A GEARBOX AND DETECTION OF THE ENGAGED GEAR
DE3937302A1 (en) * 1989-11-09 1991-05-16 Man Nutzfahrzeuge Ag METHOD FOR SWITCHING AN UNSYNCHRONIZED (CLAW) MANUAL GEARBOX AND, IF NECESSARY, AUTOMATICALLY ACTUATING THE RELATED CLUTCH
US5081588A (en) * 1990-03-26 1992-01-14 Eaton Corporation Start from stop control method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0037639A2 (en) * 1980-03-31 1981-10-14 General Motors Corporation Engine power control for automatic-shift countershaft transmission
EP0037639A3 (en) * 1980-03-31 1982-10-06 General Motors Corporation Engine power control for automatic-shift countershaft transmission
GB2208179A (en) * 1987-06-26 1989-03-08 Aisin Aw Co Controlling engine torque to smooth transmission shift
GB2208179B (en) * 1987-06-26 1991-09-04 Aisin Aw Co Method of and apparatus for controlling a motor vehicle during a gear change operation

Also Published As

Publication number Publication date
DE2258753A1 (en) 1973-06-14

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees