US3661131A - Speed controls - Google Patents

Speed controls Download PDF

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Publication number
US3661131A
US3661131A US880563A US3661131DA US3661131A US 3661131 A US3661131 A US 3661131A US 880563 A US880563 A US 880563A US 3661131D A US3661131D A US 3661131DA US 3661131 A US3661131 A US 3661131A
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United States
Prior art keywords
engine
valve
speed
idling speed
controlling
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 - Lifetime
Application number
US880563A
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English (en)
Inventor
Brian Hugh Croft
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.)
AE PLC
Federal Mogul Coventry Ltd
ZF International UK Ltd
Original Assignee
Brico Engineering Ltd
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Filing date
Publication date
Application filed by Brico Engineering Ltd filed Critical Brico Engineering Ltd
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Publication of US3661131A publication Critical patent/US3661131A/en
Assigned to AE PLC CAWSTON HOUSE CAWSTON, RUGBY WARWICKSHIRE ENGLAND reassignment AE PLC CAWSTON HOUSE CAWSTON, RUGBY WARWICKSHIRE ENGLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BRICO ENGINEERING LIMITED
Assigned to LUCAS INDUSTRIES PUBLIC LIMITED COMPANY, GREAT KING STREET, BIRMINGHAM, ENGLAND reassignment LUCAS INDUSTRIES PUBLIC LIMITED COMPANY, GREAT KING STREET, BIRMINGHAM, ENGLAND ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AE PLC
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • 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
    • F02D31/003—Electric control of rotation speed controlling air supply for idle speed control
    • F02D31/005—Electric control of rotation speed controlling air supply for idle speed control by controlling a throttle by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/06—Increasing idling speed
    • F02M3/07—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed
    • F02M3/075—Increasing idling speed by positioning the throttle flap stop, or by changing the fuel flow cross-sectional area, by electrical, electromechanical or electropneumatic means, according to engine speed the valve altering the fuel conduit cross-section being a slidable valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator

Definitions

  • the invention relates to speed control systems for controlling the rotational speed of an internal combustion engine and provides means for controlling the engine utilizing a fuel injection system idling speed so as to maintain it at a substantially constant pre-selected value which is virtually independent of ambient conditions and engine load conditions.
  • Different types of valve means are described for controlling the flow of air from a point at substantially atmospheric pressure to a point downstream of the engine throttle valve.
  • Control circuits are also described for controlling the valve means in accordance with the difference between a pre-selected value of engine idling speed and the actual engine idling speed.
  • means are .provided for controlling the idling speed of an internal combustion engine so as to maintain a substantially constant preselected value of idling speed which is virtually independent of ambient conditions and engine load conditions
  • said means for controlling the idling speed includes valve means controlling a fiow of air from a point at substantially atmospheric pressure, e.g. from a point in the induction system of the engine upstream of the engine throttle valve means therein, to a point downstream of said engine throttle valve.
  • FIG. 1 is a simplified diagram of a basic speed control arrangement
  • FIG. 2 is a diagrammatic drawing of a control valve unit
  • FIG. 3 is a diagram of one embodiment of the arrangement of FIG. 1,
  • FIG. 4 is a diagram of a motor driven control valve
  • FIG. 5 is a diagram of a further embodiment of the arrangement of FIG. 1 and FIG. 6 shows a further embodiment.
  • a reciprocating internal combustion engine 8 has an air cleaner 9 at the inlet to the engine induction pipe 10.
  • the idling speed control includes a control valve unit 11, shown in greater detail in FIG. 2, the valve unit being controlled in accordance with the difference between the actual idling speed and the required idling speed.
  • a tachometer generator 12 is driven by the engine and produces an electrical output, e.g. a voltage V which is a function of the actual engine speed.
  • a device 13 produces a voltage V which is a measure of the required idling speed.
  • the two voltages are fed to a comparator device 14, the output from which represents the difference of the voltages. This output is amplified in an amplifier 15 and the amplified signal is fed to control the valve unit 11, and hence to control the admission of air into the induction system of the engine.
  • control valve unit 11 is shown in detail.
  • This unit is positioned upstream of a conventional fuel injection system such, for example, as one of those described in U.S. Pat. Nos. 3,272,187 and 3,240,191, which system is responsive to manifold pressure and engine speed.
  • the unit is associated with the engine induction pipe 10, and includes a casing 16, the interior of which is divided by a diaphragm 17 into two chambers l8, 19.
  • the diaphragm carries a central disc valve 20 which co-operates with a valve seat 21, and a coil spring 22 loads the disc valve in the opening direction.
  • the valve seat 21 surrounds the outlet of a duct 23 which is preferably connected to the induction system just downstream of the engine air cleaner, and thus has its inlet effectively at substantially atmospheric pressure.
  • a branch pipe 24 from duct 23 is connected to chamber 18, and contains a restrictor 25.
  • the other chamber 19 is connected by a duct 26 to a point in the engine induction system 10 downstream of the throttle valve 7, where the pressure is below atmospheric pressure.
  • a further pipe or conduit 27 leads from chamber 18 to duct 26 (or direct to the induction system downstream of the throttle valve 7), and conduit 27 contains an electrically operated normally-closed valve 28.
  • the operation of the valve 28 is controlled by the amplified electrical signal from the amplifier 15, which is fed to the valve operating solenoid 29.
  • an error signal produced by the comparator 14 and amplified by amplifier l5 maintains the valve 28 in the normally closed position. Since the pressure drops across restrictor and the orifice 28a of valve 28 are an inverse function of the respective areas, this causes an increase of pressure in chamber 18, which in turn tends to load disc valve 20 onto its seating 21 against the load of spring 22. This reduces the flow of air through duct 23, chamber 19, and duct 26, from atmosphere to a point in the engine induction system 10 on the downstream side of the throttle 7, and consequently reduces the engine idling speed.
  • valve 28 Conversely, if the actual idling speed is less than the selected speed, an error signal is produced causing valve 28 to open, the pressure in chamber 18 reduced, the valve 20 opens further, and the air flow through duct 23 increases until the idling speed has increased to the selected value.
  • FIG. 3 One particular embodiment of the basic arrangement of FIG. 1 is shown in FIG. 3, wherein like parts bear the corresponding reference numerals to those in FIG. 1.
  • the reference voltage V is derived from a tapping T on a potentiometer P connected across a DC. source, such as a battery B.
  • the tapping T and hence the output voltage from device 13, is made variable so that the value of the pre-selected idling speed of the engine can be varied.
  • the DC. voltage V from the tachometer generator 12, which is a function of the actual engine speed, is fed through a filter network F and combined, with opposite polarity, with the voltage V at the input to the comparator device 14.
  • This device comprises an operational amplifier Al which produces an output error signal representing the difference between the two applied voltages.
  • the output of amplifier A1 is fed through a further operational amplifier A2 functioning as a level detector, and a buffer stage BF. These two stages correspond to the amplifier 15 of FIG. 1.
  • the out put from the buffer stage is employed to energize the operating solenoid 29 of the valve 28, and hence controls the operation of the valve unit 11, as previously described.
  • valve 28 is either closed or open, depending upon whether the engine idling speed is above or below the pre-selected value.
  • the valve 28 may be caused to operate fairly rapidly if the idling speed is fluctuating closely about the pre-selected value.
  • a motor driven valve may be used which can gradually vary the area of the valve orifice 28a (FIG. 2) between a fully closed and a fully open position.
  • FIG. 4 reproduces a part of the duct 26 and pipe or conduit 27 which are interconnected by the valve orifice 28a.
  • This orifice is controlled by a valve member 30 connected to a worm gear 31 driven by a gear 32 mounted on the output shaft of an electric motor 33.
  • the rotation of the motor in either direction to vary the position of the valve member 30 with respect to the orifice 28a is controlled by a signal depending on the difference between the voltages V and V as previously described.
  • FIG. 5 shows one particular arrangement for controlling such a motor driven valve.
  • the reference voltage V is derived from the tapping T of a potentiometer P connected across a battery B.
  • This reference voltage is applied to the input of an operational amplifier A1 together with the voltage V derived from the tachometer generator 12 and which is a function of actual engine speed.
  • the error signal output voltage produced by the operational amplifier A1 is fed through a further operational amplifier A3 which in turn produces an output voltage controlling the operation of the motor 33.
  • This motor controls the valve 30, as previously described, so as to maintain the engine idling speed at the pre-selected value.
  • the motor driven valve itself may directly control the admission of air to the engine induction pipe 10.
  • the valve must be arranged to be closed, except when controlling engine idling speed.
  • a further feature which may be incorporated is a circuit which differentiates the output of the tachometer generator with respect to time, feeding the resultant signal to the comparator, so that the error signal takes account not only of the magnitude of the difference between the actual speed and the required speed, but also of the magnitude and sense of the rate of change of the actual speed.
  • the invention may be applied to engines which employ fuel injection, for example, into the induction manifold upstream of the inlet valves.
  • An idling speed control system for an internal combustion engine having an inlet manifold, a main engine throttle valve disposed in the inlet manifold for controlling the flow of motive fluid therethrough, and a fuel injection system responsive to manifold pressure and engine speed, said system comprising electrically operable valve means for controlling the flow of motive fluid from a point at substantially atmospheric pressure to a point in the inlet manifold downstream of the main engine throttle valve but upstream of said fuel injection system, selector means for producing a first electrical signal representative of a pre-selected value of engine idling speed, means for producing a second electrical signal representative of actual engine speed and a comparator device connected to receive the first and second signals and arranged to produce an electrical output signal representative of the difference therebetween, said output signal being applied to the electrically operable valve means to control the operation thereof, whereby to maintain the engine idling speed substantially constant at said pre-selected value virtually independently of amhient conditions and engine load conditions.
  • the electrically operable valve means comprises first and second chambers each having a respective outlet which is adapted to be connected to the inlet manifold downstream of the main engine throttle valve, a diaphragm separating said chambers and carrying a valve member which co-operates with a valve seat to control the admission of motive fluid at substantially atmospheric pressure to the first chamber, a conduit for establishing restricted communication between said first and second chambers, and an electrically operable valve connected to the outlet of the second chamber for controlling the pressure therein, whereby to influence said diaphragm.
  • a system as claimed in claim 1, wherein the motive fluid at substantially atmospheric pressure is derived from a point in the induction system of the engine upstream of the throttle valve,
  • valve means comprises a solenoid operated valve.
  • valve means comprises a motor driven valve.
  • the second signal representative of actual engine speed is a voltage signal derived from a tachometer generator driven by the engine and the first signal representative of the required idling speed is a reference voltage.
  • comparator device is an operational amplifier whose output is applied to a level detector circuit which produces an output employed to control the operation of a solenoid operated valve means.
  • level detector is a further operational amplifier.
  • comparator device is an operational amplifier whose output is fed to a second operational amplifier producing an output which controls an electric motor driving the valve means.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Control Of Velocity Or Acceleration (AREA)
US880563A 1968-12-06 1969-11-28 Speed controls Expired - Lifetime US3661131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB58195/68A GB1282880A (en) 1968-12-06 1968-12-06 Systems for controlling internal combustion engine idling speeds

Publications (1)

Publication Number Publication Date
US3661131A true US3661131A (en) 1972-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US880563A Expired - Lifetime US3661131A (en) 1968-12-06 1969-11-28 Speed controls

Country Status (5)

Country Link
US (1) US3661131A (de)
JP (1) JPS4940886B1 (de)
DE (1) DE1961438C3 (de)
FR (1) FR2025516A1 (de)
GB (1) GB1282880A (de)

Cited By (29)

* 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
US3866583A (en) * 1970-04-10 1975-02-18 Volkswagenwerk Ag Mixture control system for an internal combustion engine with controlled injection fuel
US3949717A (en) * 1971-10-22 1976-04-13 Robert Bosch G.M.B.H. Pressure reduction limiter in a combustion engine
US3960130A (en) * 1974-05-28 1976-06-01 The Bendix Corporation Start air control system
US3964457A (en) * 1974-06-14 1976-06-22 The Bendix Corporation Closed loop fast idle control system
US4091777A (en) * 1975-04-11 1978-05-30 Societe Anonyme D.B.A. Electronic control circuit for a carburetor device
DE2708437A1 (de) * 1977-02-26 1978-08-31 Daimler Benz Ag Luftverdichtende einspritzbrennkraftmaschine, insbesondere fuer personenkraftwagen
FR2410738A1 (fr) * 1977-12-05 1979-06-29 Bendix Corp Systeme de commande de vitesse de ralenti pour moteur d'automobile
DE3020493A1 (de) * 1979-05-29 1980-12-11 Nissan Motor Verfahren zum steuern des ansaugluftdurchsatzes bei einem brennkraftmotor
DE3031613A1 (de) * 1979-08-23 1981-03-12 Nissan Motor Co., Ltd., Yokohama, Kanagawa Luftsteuereinrichtung fuer eine brennkraftmaschine.
FR2471487A1 (fr) * 1979-12-12 1981-06-19 Vdo Schindling Valve de regulation du regime au ralenti d'un moteur a allumage commande, notamment d'automobile
US4306527A (en) * 1979-01-26 1981-12-22 Nippondenso Co., Ltd. Method and apparatus for controlling engine rotational speed
US4321900A (en) * 1979-10-12 1982-03-30 Toyota Jidosha Kogyo Kabushiki Kaisha Fuel injection type internal combustion engine
FR2492459A1 (fr) * 1980-10-21 1982-04-23 Pierburg Gmbh & Co Kg Procede et dispositif de regulation de la vitesse du ralenti de moteurs a allumage commande
US4328775A (en) * 1980-01-30 1982-05-11 Lucas Industries Limited Closed loop control of i.c. engine idling speed
US4355606A (en) * 1978-10-02 1982-10-26 The Bendix Corporation Idle speed control valve
US4378767A (en) * 1980-09-16 1983-04-05 Toyota Jidosha Kogyo Kabushiki Kaisha Idling speed control device of an internal combustion engine
US4381747A (en) * 1980-12-08 1983-05-03 Toyota Jidosha Kogyo Kabushiki Kaisha Idling speed control device of an internal combustion engine
US4386591A (en) * 1980-09-25 1983-06-07 Toyota Jidosha Kogyo Kabushiki Kaisha Method of and apparatus for controlling the air intake of an internal combustion engine
US4387682A (en) * 1980-09-26 1983-06-14 Toyota Jidosha Kogyo Kabushiki Kaisha Method and apparatus for controlling the air intake of an internal combustion engine
US4397275A (en) * 1980-09-17 1983-08-09 Toyota Jidosha Kogyo Kabushiki Kaisha Idling speed control device of an internal combustion engine
US4401073A (en) * 1979-05-31 1983-08-30 Nissan Motor Co., Ltd. Apparatus for controlling rotational speed of internal combustion engine
DE3222363A1 (de) * 1982-06-15 1983-12-15 Robert Bosch Gmbh, 7000 Stuttgart Anordnung zur drehzahlregelung einer brennkraftmaschine
US4474153A (en) * 1981-10-09 1984-10-02 Toyo Kogyo Co., Ltd. Idling speed controlling system for internal combustion engine
US4510904A (en) * 1984-08-06 1985-04-16 Allied Corporation Vacuum operated idle speed control device
US4519369A (en) * 1981-12-26 1985-05-28 Aisin Keiki Kabushiki Kaisha Air suction device for diesel engine
DE3608417A1 (de) * 1985-03-15 1986-09-25 Nissan Motor Co., Ltd., Yokohama, Kanagawa Leerlaufdrehzahlregelsystem fuer eine kraftfahrzeug-brennkraftmaschine
US5113822A (en) * 1989-08-29 1992-05-19 Mitsubishi Denki K.K. Throttle valve control apparatus for an internal combustion engine
US20060260853A1 (en) * 2005-05-23 2006-11-23 Toyota Jidosha Kabushiki Kaisha Power output apparatus, motor vehicle equipped with power output apparatus, and control method of power output apparatus

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Publication number Priority date Publication date Assignee Title
JPS5515623B1 (de) * 1971-07-28 1980-04-24
FR2317511A1 (fr) * 1975-07-11 1977-02-04 Peugeot & Renault Dispositif electropneumatique de regulation d'une injection d'air auxiliaire a l'admission des moteurs a combustion interne
JPS529724A (en) * 1975-07-14 1977-01-25 Nippon Soken Inc Air-fuel ratio adjusting device
DE2537415C2 (de) * 1975-08-22 1982-05-19 Robert Bosch Gmbh, 7000 Stuttgart Regelkreis zum Regeln der Fahrgeschwindigkeit eines Kraftfahrzeuges
US3999388A (en) * 1975-10-08 1976-12-28 Forenade Fabriksverken Power control device
JPS5916095B2 (ja) * 1975-10-28 1984-04-13 カブシキガイシヤ ニツポンジドウシヤブヒンソウゴウケンキユウシヨ クウネンヒチヨウセイソウチ
DE2811633C2 (de) * 1978-03-17 1987-04-09 Vdo Adolf Schindling Ag, 6000 Frankfurt Einrichtung zum Regeln der Fahrgeschwindigkeit eines Kraftfahrzeugs
JPS53127933A (en) * 1978-04-10 1978-11-08 Nippon Denso Co Ltd Feed back control circuit system for internal combustion engine
JPS54160927A (en) * 1978-06-12 1979-12-20 Honda Motor Co Ltd Device for correcting intaken air amount for engine
JPS5578138A (en) * 1978-12-06 1980-06-12 Nissan Motor Co Ltd Idling speed control for internal combustion engine
JPS5596330A (en) * 1979-01-18 1980-07-22 Nissan Motor Co Ltd Engine revolution regulator of diesel engine
GB2051420B (en) * 1979-04-24 1983-12-14 Nissan Motor Intake air flow control system to control idling speed of an internal combustion engine
DE3031682A1 (de) * 1980-08-22 1982-04-01 Vdo Adolf Schindling Ag, 6000 Frankfurt Schaltung fuer eine ventilanordnung mit elektromechanischem stellglied zur regelung der leerlaufdrehzahl
JPS5756643A (en) * 1980-09-24 1982-04-05 Toyota Motor Corp Intake air flow rate control device of internal combustion engine
DE3113986A1 (de) * 1981-04-07 1982-10-21 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur regelung der leerlaufdrehzahl einer brennkraftmaschine
JPS5853650A (ja) * 1981-09-25 1983-03-30 Mazda Motor Corp 内燃機関の回転数制御装置
US4520272A (en) * 1982-01-30 1985-05-28 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Engine speed regulating system
EP0089409B1 (de) * 1982-03-18 1989-03-29 VDO Adolf Schindling AG Einrichtung zur Abschaltung der Kraftstoffzufuhr zu einem Verbrennungsmotor
FR2532686A1 (fr) * 1982-09-07 1984-03-09 Renault Procede et dispositif de regulation de la vitesse de ralenti d'un moteur thermique
JPS5987247A (ja) * 1982-11-12 1984-05-19 Fuji Heavy Ind Ltd アイドル自動調速装置
DE3242483A1 (de) * 1982-11-18 1984-05-24 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektrische vorrichtung zum beseitigen des ruckelns von fahrzeugen
DE3410993A1 (de) * 1984-03-24 1985-09-26 Vdo Adolf Schindling Ag, 6000 Frankfurt Ventilanordnung
JPH05263690A (ja) * 1992-03-23 1993-10-12 Mitsubishi Electric Corp エンジンのアイドル回転制御装置

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US2499263A (en) * 1948-03-29 1950-02-28 Leonard S Troy Electric governor and idle control
US2755786A (en) * 1954-10-25 1956-07-24 Frank F W Doering Electrical control for internal combustion engine neutralizers
US2827910A (en) * 1951-12-29 1958-03-25 Gen Electric Electrical speed control system for engines
US2911077A (en) * 1956-01-17 1959-11-03 Nelson M Brown Electrically actuated speed control mechanism for engines
US2971596A (en) * 1957-11-29 1961-02-14 Gen Motors Corp Vehicle speed control system
US3252539A (en) * 1962-03-09 1966-05-24 Acf Ind Inc Multi-barrel carburetor with adjustable idle air by-pass
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US3511329A (en) * 1968-02-14 1970-05-12 Rca Corp Speed control for automotive vehicles

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Publication number Priority date Publication date Assignee Title
US2499263A (en) * 1948-03-29 1950-02-28 Leonard S Troy Electric governor and idle control
US2827910A (en) * 1951-12-29 1958-03-25 Gen Electric Electrical speed control system for engines
US2755786A (en) * 1954-10-25 1956-07-24 Frank F W Doering Electrical control for internal combustion engine neutralizers
US2911077A (en) * 1956-01-17 1959-11-03 Nelson M Brown Electrically actuated speed control mechanism for engines
US2971596A (en) * 1957-11-29 1961-02-14 Gen Motors Corp Vehicle speed control system
US3252539A (en) * 1962-03-09 1966-05-24 Acf Ind Inc Multi-barrel carburetor with adjustable idle air by-pass
US3310044A (en) * 1965-03-26 1967-03-21 Bruce T Haverstick Electrically operated solenoid cutoff valve for gasoline carburetors
US3511329A (en) * 1968-02-14 1970-05-12 Rca Corp Speed control for automotive vehicles

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866583A (en) * 1970-04-10 1975-02-18 Volkswagenwerk Ag Mixture control system for an internal combustion engine with controlled injection fuel
US3809034A (en) * 1971-04-27 1974-05-07 Deutsche Vergaser Gmbh Co Kg Speed regulator for an internal combustion engine
US3949717A (en) * 1971-10-22 1976-04-13 Robert Bosch G.M.B.H. Pressure reduction limiter in a combustion engine
US3960130A (en) * 1974-05-28 1976-06-01 The Bendix Corporation Start air control system
US3964457A (en) * 1974-06-14 1976-06-22 The Bendix Corporation Closed loop fast idle control system
US4091777A (en) * 1975-04-11 1978-05-30 Societe Anonyme D.B.A. Electronic control circuit for a carburetor device
DE2708437A1 (de) * 1977-02-26 1978-08-31 Daimler Benz Ag Luftverdichtende einspritzbrennkraftmaschine, insbesondere fuer personenkraftwagen
FR2410738A1 (fr) * 1977-12-05 1979-06-29 Bendix Corp Systeme de commande de vitesse de ralenti pour moteur d'automobile
US4242994A (en) * 1977-12-05 1981-01-06 The Bendix Corporation Idle speed control system for vehicle engines
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Also Published As

Publication number Publication date
FR2025516A1 (de) 1970-09-11
GB1282880A (en) 1972-07-26
DE1961438A1 (de) 1970-07-23
DE1961438B2 (de) 1980-05-08
JPS4940886B1 (de) 1974-11-06
DE1961438C3 (de) 1983-12-01

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