US3667020A - Speed control apparatus for motorcar engine - Google Patents

Speed control apparatus for motorcar engine Download PDF

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Publication number
US3667020A
US3667020A US52928A US3667020DA US3667020A US 3667020 A US3667020 A US 3667020A US 52928 A US52928 A US 52928A US 3667020D A US3667020D A US 3667020DA US 3667020 A US3667020 A US 3667020A
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United States
Prior art keywords
speed
motor
throttle valve
engine
operated
Prior art date
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Expired - Lifetime
Application number
US52928A
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English (en)
Inventor
Takaya Senzaki
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.)
Honda Motor Co Ltd
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Honda Motor Co Ltd
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Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
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Publication of US3667020A publication Critical patent/US3667020A/en
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    • 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
    • B60K31/04—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 and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means
    • B60K31/042—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 and means for comparing one electrical quantity, e.g. voltage, pulse, waveform, flux, or the like, with another quantity of a like kind, which comparison means is involved in the development of an electrical signal which is fed into the controlling means where at least one electrical quantity is set by the vehicle operator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
    • F02D31/001—Electric control of rotation speed
    • F02D31/002—Electric control of rotation speed controlling air supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed

Definitions

  • ABSTRACT 30 F m A n u p i I An internal combustion engine of a vehicle is controlled in its p speedof operation by an electric motor which is coupled to "44/5 3078 the throttle valve of the engine via an electromagnetic clutch.
  • Speed selector devices regulate the introduction of cor- [52] US. (il ..3l8/297, 318/305, 123/102 responding resistances into the motor supply circuit to mmmlv the degee of of the throttle valve and pp and [5 1 e 9 are l 5 lower limit detection circuits effect operation of the motor to regulate engine speed within prescribed limits at a selected speed.
  • a release circuit is operated by the vehicle brake to [56] 1 i cited, return the speed setting to engine idle while the clutch is tem- UNITED STATES PATENTS porarily opened and the release circuit is operated by the ac-v 1 I celerator pedal to open the clutch and permit manual control 3,476,205 11/1969 Kato ..123/102 0mm engine spam 3,207,255 9/1965 Hahlganss ....l23/l02 3,172,497 3/1965 Stoner ..-.l23/102 3 Claims, 1 Drawing Figure SPEED CONTROL APPARATUS FOR MOTORCAR ENGINE BRIEF SUMMARY OF THE INVENTION
  • This invention relates to control apparatus for automatically setting the engine speed of a vehicle to a predetermined idling speed, and is characterized in that a vehicle driven by an internal combustion engine is provided with an electric motor connected to a throttle valve of the engine and is arranged so that when the speed of the engine reaches an upper limit or a lower limit of
  • a clutch is interposed between the electric motor and the throttle valve so that upon manual operation of the throttle valve the clutch is automatically opened.
  • the throttle valve upon manual operation thereof, can be released from its connection with the electric motor so as to be operable at will.
  • the foregoing apparatus can be so modified that, instead of idling speed, any desired cruising speed may be pre-set.
  • the speed of the engine can be automatically maintained to a previously set cruising speed.
  • FIGURE of the drawing is a schematic illustration of the speed control apparatus according to the invention.
  • numeral 1 denotes a conventional throttle valve interposed in a suction air passage of an internal combustion engine for driving a motorcar, and an electric motor 3 is connected to the throttle valve 1 through an elec- 'tromagnetic clutch 2 and is electrically connected to an electric source 8 in a reverse direction through a first transistor 5 which is brought into an ON" condition at the time of operation of an upper limit detecting circuit 4 and in a regular direction through a second transistor 7 which is brought into an ON" condition at the time of operation of a lower limit detecting circuit 6.
  • the upper limit detecting circuit 4 and the lower limit detecting circuit 6 comprise respective front and rear stage transistors 9, l0 and 11, 12, and the front stage transistors 9, 11 are connected at their input terminals l3, 14 to an output terminal of an electric generator 15 driven by the engine so that an electric voltage corresponding to engine speed acts thereon. Additionally there are provided several selectively operated grounding resistors so that this voltage may be properly reduced within a predetermined voltage range.
  • the grounding resistors comprise three resistors 16, corresponding to three predetermined cruising speeds and a single resistor 17 corresponding to a predetermined idling speed, and there are provided three cruising speed setting pushbuttons 18 corresponding to the three resistors 16, and a set releasing pushbutton l9 corresponding to the resistor 17. If, accordingly, any one of the three pushbuttons 18, is selectively pushed, a corresponding one of the three resistors 16, is selected and thereby the output of the generator 15 undergoes a voltage drop corresponding thereto and is set within a predetermined voltage to act on the input terminals 13,14.
  • any desired cruising speed is set if the pushbuttons 18, are selectively pushed, and an idling speed is set if the pushbuttons 18, are released.
  • the respective detecting circuits, 4,6 are operated to energize the transistors 5,7 and thereby the electric motor 3 is connected to the electric source 8 in reverse direction or in normal direction, so that the throttle valve 1 is driven thereby to rotate either in the direction of closing or in the direction of opening and thus the engine speed can be automatically regulated to keep the preset speed.
  • Numeral 20 denotes a release signal generating circuit comprising a transistor 21 and an RC time constant circuit 22, and a switch 24 (which is closed when a brake pedal 23 is pressed) is interposed therein, so that if the switch 24 is closed a release signal (a voltage drop) is obtained at its output terminal 25 for a predetermined constant period of time defined by the RC circuit 22.
  • This signal switches another transistor 26 to OF F" condition and a further transistor 27 to "ON" condition.
  • the transistor 26 is interposed in a circuit for connecting the foregoing electromagnetic clutch 2 with the electric source 8
  • -the transistor 27 is interposed in a circuit for connecting the release coil 28 for the pushbuttons 18, with the electric source 8.
  • the electromagnetic clutch 2 is cut off from current flow to release the throttle valve 1 from the electric motor 3 allowing the valve 1 to return to its closed position by the action of its own return spring, that is, to its idling position, while the release coil 28 is energized to bring the pushbuttons 18, into their release positions, that is into the idling speed setting condition.
  • the electromagnetic clutch 2 is thereafter returned automatically to its closed condition, so that thereafter the engine speed can be automatically controlled to be kept at the pre-set idling speed.
  • numeral 29 denotes an engine ignition circuit
  • numeral 30 denotes an accelerator pedal for manual operation of the throttle valve 1
  • numeral 31 is a switch which is opened when the pedal 30 is pushed down, and switch 31 is interposed in the release signal generating circuit 20 so that substantially the same operation as in the case of closing of the switch 24 can also be obtained by the opening of the. switch 31. Namely, if the switch 31 is opened, the transistor 26 is brought into the "OFF" condition to. open the electromagnetic clutch 2 so that the throttle valve 1 is released from the electric motor 3 for being allowed to be manually operated, while the transistor 27 is brought into the "ON" condition for operating the release coil 28 so that the pushbuttons 18 are returned to their released positions.
  • the respective detecting circuits 4,6 are operated to connect the electric motor 3 to the electric source 8 in the reverse direction and the normal direction, so that the throttle valve 1 is driven thereby respectively in closing direction or opening direction and thus the engine speed is automatically stabilized to maintain the pre-set idling speed. If, from this condition, with a view to manual operation of the throttle valve 1, the accelerator pedal 30 is pushed down, the electromagnetic clutch 2 is opened by the release signal, so that the throttle valve 1 is released from its connection with the electric motor 3 to be brought into a freely operable condition.
  • the throttle valve 1 is again connected to the electric motor 3 for undergoing automatic control by the electric motor 3. If, additionally, any one of the pushbuttons 18 is pushed, a cruising speed corresponding thereto is set instead of the foregoing idling speed, and almost the same operation as in the foregoing case can be obtained at this set value. Namely, if the engine speed reaches an upper limit or a lower limit thereof, the respective detecting circuits 4,6 are operated, so that the electric motor 3 operates the throttle valve 1 to move towards closing or opening and thus the engine speed can be automatically maintained at the pre-set cruising speed.
  • Speed control apparatus for an internal combustion engine which drives a vehicle, the vehicle having a brake
  • said apparatus comprising an electric motor, an engine throttle valve, means coupling the motor and throttle valve such that when the engine speed reaches an upper limit or a lower limit of a pre-set speed, the electric motor is operated in normal or reverse direction for controlling the throttle valve to move respectively in closing direction or opening direction to maintain the pre-set speed
  • the latter means including a clutch means between the motor and throttle valve, a source of electrical energy, upper and lower limit detecting circuits between the source and motor to selectively energize the motor in a particular direction to maintain the engine speed within the pre-set range, and speed selection means between said source and motor and connected to said detecting circuits
  • said speed selection means including an idle speed selector, at least one cruising speed selector and corresponding voltage adjustment means operated by said selectors for regulating the voltage idle speed selector while also decoupling the clutch means when the brake pedal is operated, said throttle valve thereafter returning to its idle position under the control of the motor as determined by the voltage adjustment
  • Speed control apparatus as claimed in claim 1 comprising means controlling the clutch means to open the same when the throttle valve is manually operated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Controls For Constant Speed Travelling (AREA)
US52928A 1969-07-07 1970-07-07 Speed control apparatus for motorcar engine Expired - Lifetime US3667020A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44053078A JPS4945675B1 (enrdf_load_stackoverflow) 1969-07-07 1969-07-07

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US3667020A true US3667020A (en) 1972-05-30

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JP (1) JPS4945675B1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809034A (en) * 1971-04-27 1974-05-07 Deutsche Vergaser Gmbh Co Kg Speed regulator for an internal combustion engine
US3946707A (en) * 1974-07-24 1976-03-30 Dana Corporation Electronic vehicle speed control
FR2343623A1 (fr) * 1976-03-10 1977-10-07 Bosch Gmbh Robert Dispositif pour la regulation de la vitesse de marche d'un vehicule automobile
US4313408A (en) * 1977-03-30 1982-02-02 Vdo Adolf Schindling Ag Device for the control of the traveling speed of a motor vehicle
EP0042364A3 (en) * 1980-06-16 1982-05-19 Fiat Auto S.P.A. Method and apparatus for adjusting the idling speed rate of an internal combustion otto cycle engine
US4656407A (en) * 1985-06-14 1987-04-07 A.R.A. Manufacturing Company Of Delware, Inc. Electric motor servo control system and method
FR2766874A1 (fr) * 1997-08-01 1999-02-05 Renault Agriculture Procede de commande d'un moteur a combustion interne

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172497A (en) * 1963-01-21 1965-03-09 Thomas A Stoner Electrical control and indicating system for motor vehicles
US3207255A (en) * 1964-01-21 1965-09-21 Vdo Schindling Method of and apparatus for limiting and controlling the traveling speed of automotive vehicles
US3249175A (en) * 1964-04-22 1966-05-03 Curtiss Wright Corp Speed regulating mechanisms
US3344880A (en) * 1964-11-24 1967-10-03 Toyota Motor Co Ltd Voltage operated automatic speed control system for automobiles
US3425401A (en) * 1966-05-20 1969-02-04 Bosch Gmbh Robert Electronic controller for diesel engine
US3476205A (en) * 1967-02-20 1969-11-04 Nippon Denso Co Automatic constant speed maintaining means for an automobile
US3533383A (en) * 1967-11-14 1970-10-13 Midland Ross Corp Vehicle speed control system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172497A (en) * 1963-01-21 1965-03-09 Thomas A Stoner Electrical control and indicating system for motor vehicles
US3207255A (en) * 1964-01-21 1965-09-21 Vdo Schindling Method of and apparatus for limiting and controlling the traveling speed of automotive vehicles
US3249175A (en) * 1964-04-22 1966-05-03 Curtiss Wright Corp Speed regulating mechanisms
US3344880A (en) * 1964-11-24 1967-10-03 Toyota Motor Co Ltd Voltage operated automatic speed control system for automobiles
US3425401A (en) * 1966-05-20 1969-02-04 Bosch Gmbh Robert Electronic controller for diesel engine
US3476205A (en) * 1967-02-20 1969-11-04 Nippon Denso Co Automatic constant speed maintaining means for an automobile
US3533383A (en) * 1967-11-14 1970-10-13 Midland Ross Corp Vehicle speed control system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809034A (en) * 1971-04-27 1974-05-07 Deutsche Vergaser Gmbh Co Kg Speed regulator for an internal combustion engine
US3946707A (en) * 1974-07-24 1976-03-30 Dana Corporation Electronic vehicle speed control
FR2343623A1 (fr) * 1976-03-10 1977-10-07 Bosch Gmbh Robert Dispositif pour la regulation de la vitesse de marche d'un vehicule automobile
US4313408A (en) * 1977-03-30 1982-02-02 Vdo Adolf Schindling Ag Device for the control of the traveling speed of a motor vehicle
EP0042364A3 (en) * 1980-06-16 1982-05-19 Fiat Auto S.P.A. Method and apparatus for adjusting the idling speed rate of an internal combustion otto cycle engine
US4656407A (en) * 1985-06-14 1987-04-07 A.R.A. Manufacturing Company Of Delware, Inc. Electric motor servo control system and method
FR2766874A1 (fr) * 1997-08-01 1999-02-05 Renault Agriculture Procede de commande d'un moteur a combustion interne
WO1999006238A1 (fr) * 1997-08-01 1999-02-11 Renault Agriculture Procede de commande d'un moteur a combustion interne
US6338697B1 (en) * 1997-08-01 2002-01-15 Renault Agriculture Method for controlling an internal combustion engine

Also Published As

Publication number Publication date
JPS4945675B1 (enrdf_load_stackoverflow) 1974-12-05

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