US3636933A - Electronic governor for injection-type internal combustion engines - Google Patents

Electronic governor for injection-type internal combustion engines Download PDF

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Publication number
US3636933A
US3636933A US40793A US3636933DA US3636933A US 3636933 A US3636933 A US 3636933A US 40793 A US40793 A US 40793A US 3636933D A US3636933D A US 3636933DA US 3636933 A US3636933 A US 3636933A
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United States
Prior art keywords
circuit
engine
voltage
output
fuel
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Expired - Lifetime
Application number
US40793A
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English (en)
Inventor
Yoshio Ohtani
Akihiko Fukushima
Todomu Kakijima
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Bosch Corp
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Diesel Kiki Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F02D41/1498—With detection of the mechanical response of the engine measuring engine roughness
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1015—Engines misfires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/406—Electrically controlling a diesel injection pump
    • F02D41/407—Electrically controlling a diesel injection pump of the in-line type

Definitions

  • ABSTRACT An electronic governor for injection-type internal combustion engines, having a fuel oversupply mechanism for facilitating the starting up of the engine, a speed regulation setting circuit, an electromagnetic fuel control mechanism of movable type and a means for providing an ung1eich" action, in which an output DC voltage proportional to the rotation speed of engine generated by a DC voltage generating circuit and an unbalance output voltage relative to the position of the fuel supply lever of the engine from a bridge circuit are comparated by a voltage comparator circuit, the output of the comparator circuit is fed to an amplifying circuit, and a fuel control rod of the fuel control mechanism is actuated by the output signal from the amplifying circuit.
  • This invention concerns the electronic fuel control device for injection-type internal combustion engines.
  • the controlling force that is, the force required to actuate the fuel control rod for control purpose is not large enough to ensure the stability of control because it is obtained from the fuel injection pump drive through the medium of speed-controlled eddy current.
  • the invention is to eliminate the drawback mentioned above, and to introduce an un Mrs" characteristic into the operation of the governor, which includes a conventional fuel oversupply mechanism for use during engine starting and a conventional speed regulation setting circuit, in order more effectively to meet the characteristic fuel requirements of the engine.
  • FIG. 1 is an electrical block diagram showing an electronic governor for injection-type internal combustion engines according to this invention
  • FIG. 2 is a circuit diagram showing an embodiment of the electronic governor
  • FIG. 3 is a diagram of the characteristic of the voltage ap plied to an electromagnetic fuel control mechanism of the invention
  • FIGS. 4 and 5 are a cross-sectional views for illustrating different electromagnetic fuel control mechanisms according to the invention attached to fuel injection pump;
  • FIG. 6 is a diagrammatic view showing an embodiment of a fuel oversupply mechanism attached to the fuel injection pump.
  • FIG. 7 is a graph showing a control characteristic of the electronic governor of the invention.
  • T1T13 are transistors; D1-D4, diodes;
  • section A is an electromagnetic converter for translating rotating speed into voltage. It is formed with a detector coil 4a and a permanent magnet 4 positioned close to a magnetic body 311 in toothed wheel shape.
  • the magnetic body 3a is coupled to the camshaft 3 of the fuel injection pump. As the body 3a rotates, its teeth or peripheral protrusions move past the magnet 4. Each tooth moves toward the magnet 4 and then away from it. This relative movement repeats itself to induce a voltage in detecting coil 4a on the magnet 4, as body 3a rotates.
  • the induced voltage applies to amplifying circuit B composed of transistor T1, capacitor C1, resistors R1 and R2.
  • a trigger pulse signal is delivered from this circuit 13 as an amplified voltage is differentiated by differentiating circuit C having capacitor C2 and resistor R3 and then a trigger pulse signal is delivered.
  • the trigger pulse signal applies to detecting circuit having diode D1. This diode removes positive pulses from the signal.
  • the resulting negative pulse signal enters monostable multivibrator circuit D, composed of transistors T2 and T3, load resistances R4 and R8, bias resistor R6, base resistor R7, speedup capacitor C4, and resistor R5 and capacitor C3 for use in setting the time constant thereby inducing a rectangular waveform whose pulse length is constant.
  • the output signal of this multivibrator D is fed to integrating circuit E composed of resistor R9 and capacitor C5, and emerges from the integrating circuit as a DC voltage proportional to the pulse frequen cy, that is, the value of engine rpm.
  • the DC voltage applies to comparator circuit F, of which more will be said later.
  • transistor T4 is so connected that it becomes conductive when a DC voltage applies to its base and, by conduction, changes its collector voltage.
  • the output voltage of comparator circuit F is amplified by the next amplifying circuit G composed of resistors R13, R11, and R15 and transistor T5. To this transistor T5, variable resistor VR1 for setting the speed regulation is connected.
  • the amplified output signal from circuit G is again amplified by circuit H composed of transistor T8 and resistor R18 and then supplied to movable coil L2 in the fuel control mechanism P shown in FIGS. 4 and 5.
  • This coil and transistor T9 form power-amplifying circuit 1, in which coil L2 is energized with the output of said circuit H.
  • oscillator circuit J produces a signal to be supplied to bridge circuit K.
  • the oscillator circuit J is composed of transistor T10, resistors R19, R20, R21 and R22, capacitors cs and C7 and transformer Tr.
  • the oscillator output signal supplied to bridge circuit K serves as a carrier wave.
  • the circuit K is composed of coil L1, resistors R23 and R24 and variable-inductance coil VL. This variable-inductance coil is for use in setting the rotating speed, and is connected to the fuel supply lever, not shown, of the internal combustion engine.
  • the balance in the bridge circuit K changes with the position of the fuel supply lever.
  • a voltage arising from an unbalanced condition of this circuit applies through capacitor C8 to amplifying circuit L comprising transistor T11, bias resistors R25 and R26, capacitor C9, resistors R27 and R28.
  • the amplified output voltage of circuit L is further amplified by the next amplifying circuit M composed of capacitor C10, resistors R29, R30 and R31 and transistor T12, and is forwarded to detector circuit N composed of diode D3 and capacitor C11.
  • the output signal from this detector N is then converted into a DC voltage by smoothing circuit 0 composed of resistors R32 and R33 capacitor C12.
  • the DC voltage so introduced applies through diode D4 to the comparator circuit F connected to the aforementioned integrating circuit E.
  • Said comparator circuit F is composed. of transistors T13, and T4, resistors R10, R11, R12 and R34.
  • the emitters of these transistors are connected together, through resistor R34, to negative conductor 2, whereas their collectors are separate ly connected to positive conductor 1, the collector of transistor T4 being so connected through a series circuit of resistors R10 and R11.
  • Resistor R12 connects the junction point between R10 and R11 to negative conductor 2.
  • transistor T4 With this current, emitter voltage on transistor T4 rises relative to the potential of said unbalance and makes transistor T 1 less conductive. In other words, the transistor T4 becomes conductive proportionally to the output voltage of integrating circuit E which is proportional to rotating speed N of said engine. On the other hand, the degree transistor T4 becomes nonconductive proportionally to the unbalance voltage of bridge circuit K, which is determined by the position of the fuel supply lever. Varied positions of this lever are represented by V L1-VL4l in FIG. 3. Thus, the output voltage of transistor T4 is. proportional to the difference between the two voltages from integrating circuit E and bridge circuit K. This output voltage is amplified by circuit G, in which said variable resistor VR1 for setting the speed regulation is provided.
  • the degree of amplification on this amplifying circuit G may be adjusted by the resistor V R1.
  • the rate of change (or gradient) of output voltage can be changed for a change in engine speed. Said rate of change determines the speed regulation for the engine. Generally, as small a speed regulation as will avoid engine hunting is preferable.
  • resistor VR1 is set to secure the preferred regulation, it is seldom necessary, in actual application, to reposition this resistor.
  • the output voltage of circuit G applies to amplifying circuit H and then to electromagnetic fuel control mechanism P for controlling the engine speed.
  • the DC voltage shunted from the output integrating circuit IE which is proportional to the rotation speed of engine, is diverted and impressed onto the base of transistor T7 in a downstream side circuit designated as U, whose other elements are diode D2 and resistor R17.
  • the emitter of T7 is connected to the cathode of D2, whose anode is connected to the series amplifying circuit V composed of variable resistor VR2, resistor R16 and transistor T6.
  • Variable resistor VR2 is for use in setting untechnisch," whose meaning will be made clear later.
  • the emitter of transistor T6 is connected to the base of transistor T8 in amplifying circuit H.
  • the DC signal proportional to the rotation speed of engine from the circuit V is amplified by the circuit H, and then is fed to power-amplifying circuit I.
  • On the output of circuit H therefore, in addition to the unbalance voltage produced in relation to the position of the fuel supply lever, an output voltage proportional to the rotation speed of engine is obtained.
  • This operation is represented by the dot line VR2 in FIG. 3 and provide untician" action.
  • Unrete denotes the action by which the fuel injection quantity is automatically decreased in proportion as an air-intake efficiency of engine cylinder decrease with rising engine speed under full load operating conditions.
  • the electromagnetic fuel control mechanism P is mounted on the fuel injection pump 5 and comprises cylindrical exciting coil P1, annular movable coil L2, inner pole P2 and annular outer pole P3.
  • Movable coil L2 is located between the inner and outer poles. These components are centered on a common axis and enclosed in a case. Movable coil L2 is supported from the fuel-adjusting lever 5a by means of a link member extending through the case. Exciting coil P1 is supplied with exciting current from an external electrical source, not shown, and, when so excited, energizes poles P2 and P3 magnetically.
  • CoilL2 is energized with a control current supplied from the output of said poweramplifying circuit I and, when so energized, induces a force proportional in strength to the magnitude of energizing current and acting in the direction perpendicular to the direction of magnetic field, by Flemings left-hand rule.
  • This force is, mathematically, the product of coil length, flux density of magnetic pole and energizing current.
  • the source of exciting current for coil P1 is the battery belonging to the engine, a change in the battery voltage would result in a corresponding change in the flux density and hence in the force acting on movable coil L2.
  • Such a change can be avoided by applying to exciting coil Pl a voltage high enough to saturate the flux density, or by substituting a permanent magnet P4, shown in FIG. 5, for the electromagnet composed of coil Pl, poles P, P2 and P3.
  • fuel control rod 5a has a protrusion 5b at its distal portion, and electromagnet 6 is appropriately located to magnetically attract and release stopper 6a. This stopper is urged by spring 6b to bear against said protrusion 5b. Fuel control rod 5a is urged by spring 7 to move in the direction of increasing fuel injection quantity, but is prevented by stopper 6a from so moving. Electromagnet 6 is electrically so associated with the engine starter switch, not shown, that turning on the starter switch automatically closes its circuit to energize its coil.
  • control rod a must be moved farther beyond the 14 mm. limit to say, mm. position so as to inject a much greater quantity of fuel. This is automatically accomplished in the arrangement shown by turning on the starter switch to energize coil 6 and thereby pull stopper 6a away from protrusion 5b. This allows control rod 50 to move to the 20 mm. position under the urging force of spring 7. In other words, an attempt to start up the engine automatically increases the range of control rod movement from 14 mm. to 20 mm. in this example. After firing up the engine, the starter switch is turned off, as is the usual practice, and this turning off of the starter switch deenergizes electromagnet 6 to release stopper 6a and thereby limit the movable range of control rod 50.
  • the governor according to this invention includes not only such conventional features as adjustable speed regulation and a fuel oversupply mechanism for facilitating the starting up to the engine but also a new feature of un Eisen" action, and provides an electromagnetic fuel control mechanism of movable type making available stable controlling force, all for improved control of the engine in operation.
  • An electronic governor for an injection-type internal combustion system comprising: a DC voltage generating circuit for generating a DC voltage proportional to the speed of rotation of the engine; a bridge circuit including a variable inductance coil located in one arm thereof, an oscillator circuit connected across the input of said bridge, the impedance of said coil being a function of the position of the fuel supply cordance with a desired rate of automatic decrease in the quantity of fuel injected corresponding to the decrease in airintake efficiency of the engine cylinders with rising engine speed under full load conditions; and an electromagnetic fuel control mechanism for controlling a fuel control rod responsive to the output of said amplifier circuit.

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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)
  • High-Pressure Fuel Injection Pump Control (AREA)
US40793A 1969-05-27 1970-05-27 Electronic governor for injection-type internal combustion engines Expired - Lifetime US3636933A (en)

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JP44040630A JPS4922242B1 (hu) 1969-05-27 1969-05-27

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757750A (en) * 1970-09-17 1973-09-11 Diesel Kiki Co Electronic governor for injection-type internal combustion engines
US3761729A (en) * 1970-12-17 1973-09-25 Bosch Gmbh Robert Arrangement for preventing excessive speeds in internal combustion engines
US3777174A (en) * 1971-03-02 1973-12-04 Mtu Friedrichshafen Gmbh Electronic speed regulator for internal combustion engines
US3789810A (en) * 1972-07-14 1974-02-05 Gen Motors Corp Internal combustion engine speed limiting circuit
US3809034A (en) * 1971-04-27 1974-05-07 Deutsche Vergaser Gmbh Co Kg Speed regulator for an internal combustion engine
US3900013A (en) * 1972-03-28 1975-08-19 Magneti Marelli Spa Electronic system to control operator circuits as a function of speed of machine rotating member
US4432319A (en) * 1980-03-26 1984-02-21 Nissan Motor Company, Limited Fuel injection control system for a fuel injection pump
GB2164390A (en) * 1984-09-12 1986-03-19 Bosch Gmbh Robert Speed governor for i.c. engine fuel injection pumps
US4596216A (en) * 1982-06-01 1986-06-24 Microfuel Technologies Inc. Fuel meter
US4852535A (en) * 1987-10-01 1989-08-01 Steyr-Daimler-Puch Ag Automatic control method for moving a final control element
US20040107941A1 (en) * 2000-08-17 2004-06-10 Satoru Goto Starting system for pilot-ignition gas engine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2856910A (en) * 1956-04-23 1958-10-21 Acf Ind Inc Fuel injection system
US3060602A (en) * 1960-07-22 1962-10-30 Honeywell Regulator Co Control apparatus
US3124693A (en) * 1964-03-10 Pfiras
US3201647A (en) * 1960-11-18 1965-08-17 Pye Ltd Speed control system
US3400776A (en) * 1966-11-14 1968-09-10 William F. Smith Apparatus for controlling the braking and acceleration of motorcycles and other motor-driven vehicles
US3407793A (en) * 1966-05-20 1968-10-29 Bosch Gmbh Robert Electronic controller for diesel engines
US3476205A (en) * 1967-02-20 1969-11-04 Nippon Denso Co Automatic constant speed maintaining means for an automobile
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124693A (en) * 1964-03-10 Pfiras
US2856910A (en) * 1956-04-23 1958-10-21 Acf Ind Inc Fuel injection system
US3060602A (en) * 1960-07-22 1962-10-30 Honeywell Regulator Co Control apparatus
US3201647A (en) * 1960-11-18 1965-08-17 Pye Ltd Speed control system
US3407793A (en) * 1966-05-20 1968-10-29 Bosch Gmbh Robert Electronic controller for diesel engines
US3400776A (en) * 1966-11-14 1968-09-10 William F. Smith Apparatus for controlling the braking and acceleration of motorcycles and other motor-driven vehicles
US3476205A (en) * 1967-02-20 1969-11-04 Nippon Denso Co Automatic constant speed maintaining means for an automobile
US3543739A (en) * 1967-10-11 1970-12-01 Brev Etudes S I B E De Fuel feed device for an internal combustion engine

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3757750A (en) * 1970-09-17 1973-09-11 Diesel Kiki Co Electronic governor for injection-type internal combustion engines
US3761729A (en) * 1970-12-17 1973-09-25 Bosch Gmbh Robert Arrangement for preventing excessive speeds in internal combustion engines
US3777174A (en) * 1971-03-02 1973-12-04 Mtu Friedrichshafen Gmbh Electronic speed regulator for internal combustion engines
US3809034A (en) * 1971-04-27 1974-05-07 Deutsche Vergaser Gmbh Co Kg Speed regulator for an internal combustion engine
US3900013A (en) * 1972-03-28 1975-08-19 Magneti Marelli Spa Electronic system to control operator circuits as a function of speed of machine rotating member
US3789810A (en) * 1972-07-14 1974-02-05 Gen Motors Corp Internal combustion engine speed limiting circuit
US4432319A (en) * 1980-03-26 1984-02-21 Nissan Motor Company, Limited Fuel injection control system for a fuel injection pump
US4596216A (en) * 1982-06-01 1986-06-24 Microfuel Technologies Inc. Fuel meter
GB2164390A (en) * 1984-09-12 1986-03-19 Bosch Gmbh Robert Speed governor for i.c. engine fuel injection pumps
US4852535A (en) * 1987-10-01 1989-08-01 Steyr-Daimler-Puch Ag Automatic control method for moving a final control element
US20040107941A1 (en) * 2000-08-17 2004-06-10 Satoru Goto Starting system for pilot-ignition gas engine
US6990946B2 (en) * 2000-08-17 2006-01-31 Niigata Power Systems Co., Ltd. Starting system for pilot-ignition gas engine

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Publication number Publication date
JPS4922242B1 (hu) 1974-06-07

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