GB1277276A - Vehicle road speed control system - Google Patents

Vehicle road speed control system

Info

Publication number
GB1277276A
GB1277276A GB5012469A GB5012469A GB1277276A GB 1277276 A GB1277276 A GB 1277276A GB 5012469 A GB5012469 A GB 5012469A GB 5012469 A GB5012469 A GB 5012469A GB 1277276 A GB1277276 A GB 1277276A
Authority
GB
United Kingdom
Prior art keywords
speed
voltage
potentiometer
servomotor
throttle
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
GB5012469A
Inventor
John Cadden Coyle
Dereck Roy Best
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB5012469A priority Critical patent/GB1277276A/en
Publication of GB1277276A publication Critical patent/GB1277276A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K31/02—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including electrically actuated servomechanism including an electric control system or a servomechanism in which the vehicle velocity affecting element is actuated electrically
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controls For Constant Speed Travelling (AREA)

Abstract

1277276 Automatic control of speed ROLLS ROYCE Ltd 13 Oct 1969 50124/69 Heading G3R The road speed of a vehicle is controlled in response to the difference between desired and actual speed signals, the difference signal being subjected to both real time and delayed feedback from a speed control actuator to prevent overreaction to the difference signal. The speed signal comprises pulses produced in a coil 11 by a toothed disc on the propellor shaft, the frequency of which is converted to a smooth D. C. voltage in a diode pump circuit 13 for comparison with a speed reference voltage from a potentiometer 15 in a transistor amplifier unit 14. This produces a constant voltage when there is no speed error, which is balanced in a differential switching unit 16 by an equal voltage from a potentiometer 22 coupled to an engine throttle servomotor 17. The potentiometer 22 is also connected via an RC delay circuit 23 to the error input of the switching unit 16. A speed error changes this input voltage and the resulting unbalance drives the throttle servomotor in the appropriate direction. This would proceed until the voltage from 22 balanced the new input to 16 but would cause overshoot; the addition of the delayed signal through 23 prevents this. All the circuits comprise transistors and are fully described Fig. 2 (not shown) and component values are given. The linkage between the servomotor 17 and the throttle 20 includes an electromagnet which is de-energized by brake or accelerator to disable the automatic system.
GB5012469A 1969-10-13 1969-10-13 Vehicle road speed control system Expired GB1277276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5012469A GB1277276A (en) 1969-10-13 1969-10-13 Vehicle road speed control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5012469A GB1277276A (en) 1969-10-13 1969-10-13 Vehicle road speed control system

Publications (1)

Publication Number Publication Date
GB1277276A true GB1277276A (en) 1972-06-07

Family

ID=10454743

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5012469A Expired GB1277276A (en) 1969-10-13 1969-10-13 Vehicle road speed control system

Country Status (1)

Country Link
GB (1) GB1277276A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411098A1 (en) * 1977-12-07 1979-07-06 Vdo Schindling AUTOMATIC DEVICE FOR REGULATING THE RUNNING SPEED OF A MOTOR VEHICLE
FR2411099A1 (en) * 1977-12-09 1979-07-06 Vdo Schindling MOTOR VEHICLE SPEED REGULATION DEVICE
GB2134288A (en) * 1982-12-03 1984-08-08 Fuji Heavy Ind Ltd Idling speed regulation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2411098A1 (en) * 1977-12-07 1979-07-06 Vdo Schindling AUTOMATIC DEVICE FOR REGULATING THE RUNNING SPEED OF A MOTOR VEHICLE
FR2411099A1 (en) * 1977-12-09 1979-07-06 Vdo Schindling MOTOR VEHICLE SPEED REGULATION DEVICE
GB2134288A (en) * 1982-12-03 1984-08-08 Fuji Heavy Ind Ltd Idling speed regulation

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee