US3620196A - Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines - Google Patents

Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines Download PDF

Info

Publication number
US3620196A
US3620196A US67851A US3620196DA US3620196A US 3620196 A US3620196 A US 3620196A US 67851 A US67851 A US 67851A US 3620196D A US3620196D A US 3620196DA US 3620196 A US3620196 A US 3620196A
Authority
US
United States
Prior art keywords
transistor
diode
arrangement
voltage
resistor
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
US67851A
Other languages
English (en)
Inventor
Wolf Wessel
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US3620196A publication Critical patent/US3620196A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F02D41/32—Controlling fuel injection of the low pressure type

Definitions

  • arging sources are switched and connected to the capacitor in predetermined sequence.
  • the quantity of fuel injected after each operating cycle of an internal combustion engine is determined by the opening duration of the associated fuel injection valve.
  • This valve admits the fuel under substantially constant pressure.
  • the feedback circuit of the monostable multivibrator includes an electrical energy storage element, which consists of an inductor or choke. The magnitude of the inductor or choke is adjusted or varied in accordance with the pressure prevailing behind the throttle flap within the intake manifold.
  • the duration of the unstable state of the multivibrator may be varied through a control voltage which varies as a function of time.
  • the control voltage is generated at the end of a pulse and is producedthrough a control circuit which has two or more switching transistors.
  • two storage capacitors are provided in one interconnected chain through resistors.
  • the voltage at the end of the chain is coupled to the emitter-base circuit of the input transistor of the monostable multivibrator.
  • Such coupling is achieved through a resistor.
  • difficulty is incurred in matching such known control circuit to the speed characteristics of a particular internal combustion engine.
  • control voltage in accordance with the present invention, is produced from a circuit which applies self-corrections to the opening pulses as a function of engine speed.
  • At least two charging sources of different internal resistance are provided, in accordance with the present invention, for the storage capacitor. These charging sources are connected to the storage capacitor one after another, so that the previously effective charging source becomes disconnected when the next charging source takes effect.
  • a control arrangement for the injection of fuel in internal combustion engines The fuel is injected through an electromagnetically controlled valve which is opened through the application of a pulse.
  • the opening pulses for the valves are generated by a monostable multivibrator which provides substantially rectangular-shaped pulses with durations equal to the opening interval of the fuel injection valves.
  • a control voltage is generated and applied to the multivibrator at a circuit point where the potential influences the ends of the pulses, and thereby the ends of the unstable state of the multivibrator.
  • the control voltage varies the duration of the pulse signals as a function of the speed of the engine.
  • the control voltage furthermore, has characteristics which vary periodically in synchronism with the pulse signals.
  • a storage capacitor is used for integrating the control voltage, and the capacitor becomes charged through at least two charging sources connected thereto, and having different internal resistances.
  • a switching circuit connected to the charging sources connects one or the other sources to the capacitor. Two capacitors may be used in which case the coupling diodes prevail between them. When such two capacitors are used, that capacitor is operative which has the more positive voltage across it.
  • FIG. I is an electrical circuit diagram and shows the components and their interconnections of the control device for internal combustion engines, in accordance with the present invention
  • FIG. 2 is a graphical representation as a function of time, of the correction applied to the opening duration for the fuel injection valves, as produced by the circuit diagram of FIG. 1;
  • FIG. 3 is an electrical circuit diagram of another embodiment of the arrangement of FIG. I;
  • FIG. 4 is a graphical representation as a function of time of the control voltage generated by the circuit diagram of FIG. 3;
  • FIG. 5 is still another embodiment of the control arrangement of FIG. 1;
  • FIG. 6 is a graphical representation as a function of time of the control voltage generated through the circuit arrangement of FIG. 5.
  • the fuel injection arrangement is adapted to drive a four-cylinder internal combustion engine 1.
  • the spark plugs 2 of this engine are connected to a high-voltage ignition arrangement, not shown.
  • Fuel from a fuel distributor 6, is transmitted to each electromagnetically actuated injection valve 4, through fuel lines 5.
  • a pump 7 driven by an electric motor maintains the pressure of the fuel within the distributor 6 and fuel lines 5 at a pressure of substantially 2 atmospheres.
  • Each fuel injection valve 4 possesses a magnetizing coil, not shown having one tenninal connected to ground potential.
  • the other terminal of the coil are connected through the circuit lines 8 to resistors 9.
  • each one of the magnetizing coils of a valve is connected through one line 8 to one resistor 9.
  • the resistors 9 are paired, and each of two pairs of resistors 9 are connected together, at one terminal, and to the collector of one of two transistors 10 and 11.
  • the regulating and control circuit includes, in addition to the power transistors 10 and 11, a monostable multivibrator 12 for generating electrical pulse signals.
  • This monostable multivibrator in transistorized form, is outlined through a border designated by broken lines.
  • the monostable multivibrator has an input transistor 13 and an output transistor 14, as well as an inductor or ferromagnetic choke 15 for the purpose of serving as a timing element.
  • the choke or inductor 15 is constructed in the form of a transformer, and has a displaceable armature 16.
  • the armature is, in turn, secured to a displacement rod 17 which is connected to the membrane, not shown, of a pressure sensor 18.
  • the pressure-sensing device 18 is connected with its suction side, to the intake manifold 3 of the internal combustion engine.
  • the pressure sensor l8, furthermore, is located directly behind an adjustable throttle flap I0 which may be adjusted or displaced to a foot lever or pedal 19.
  • the armature I6 is moved in the direction of the arrow shown in the drawing. in this manner, the airgap of the transformer is increased and the inductance of the primary winding 21 of the transformer is decreased when the pressure within the intake manifold 3 drops or is decreased and the armature 16 moves in the direction of the arrow shown.
  • the secondary winding 22 of the transformer has one tenninal connected to the base of the input transistor 13 and to a resistor 24.
  • the other tenninal of the winding 22 is connected to the circuit junction H.
  • a resistor 25 is connected between this circuit junction H and the positive voltage supply line 23.
  • a resistor 26, furthermore, is connected between the negative voltage supply line and the circuit junction H.
  • the negative voltage supply line 30 is also connected to ground potential.
  • the positive and negative voltage supply lines 23 and 30 are connected to a l2-volt battery, not shown, which supply the electrical energy to the respective terminals.
  • the transistors 13 and 14 are both of the NPN-type, and both have their emitters connected to the negative voltage supply line 30.
  • the collector of the input transistor 13 is connected through a resistor 27, to the positive voltage supply line 23.
  • the collector of the transistor 14, leads to the positive supply line 23, through a series circuit consisting of the primary winding 21 of the transformer 15 and a resistor 28 connected in series therewith.
  • the base of the transistor 14 is connected, through a resistor 29, with the collector of the transistor 13.
  • a capacitor 31 used for differentiating purposes is connected between the base of the transistor 13 and the fixed contact 32 of the switch having a movable contact 33 connected to the negative supply line 30.
  • the movable arm of this switch is actuated or operated through a two-lobed cam which is mechanically coupled to the crank shaft 34 of the engine.
  • the two-lobed cam 35 becomes closed once and thereby causes the transistor 13 to become nonconducting.
  • the switching contact 32 leads to the positive voltage supply line 23, through a resistor 36.
  • Another resistor 24 is connected between the voltage supply line 23 and the other electrode of the capacitor 31.
  • the junction of the capacitor 31 and the resistor 24, is also connected to one terminal of the secondary winding 22.
  • the pulse currents J vary with variations in pressure within the intake manifold 3 and, thereby, the inductance of the primary winding 21.
  • the input transistor 13 is in the conducting state, and thereby maintains the output transistor 14 cut off.
  • the switching arm 33 becomes pressed, however, against the switching contact 32, through the action of the cam 35, the stored charge across the capacitor 31 causes a drop in the base potential of the input transistor 13.
  • the arrangement is such that the base potential of the input transistor 13 becomes thereby dropped below the potential of the negative voltage supply line 30.
  • the transistor 13 becomes cut off and the multivibrator l2 switches to its unstable operating state. In this unstable state, the transistor 14 conducts.
  • the transistor 14 has then applied to its collector, a current which rises exponentially, This exponentially rising current flows through the primary winding 21 and gives rise to an increasing magnetic field in the core and armature 16 of the transformer.
  • the increase in current occurs more rapidly, the larger the airgap and the smaller the inductance ofthe primary winding 21 resulting from the increase in the airgap.
  • the conducting transistor 14 maintains the power transistors 10 or 11 also in the conducting state, through an amplifier 38. However, as soon as transistor 13 returns to its stable conducting state, the transistor 14, 10 and 1! become again cut off.
  • the duration of the pulses .l which switch the valve 4 to their opening position extends thereby from the instant or closure of the switch 33 to the instant of time at which the output transistor 14 becomes cut off and the input transistor 13 becomes again conducting.
  • the inductance of the primary winding 21 decreases with drop in pressure within the intake manifold 3, and the collector current of the transistor 14 rises more rapidly as a result, the induced voltage within the secondary winding 22 also decreases more rapidly.
  • the input transistor 13, at the same time returns to its conducting state at an earlier instant of time.
  • the valves 4 become thereby closed at an earlier instant of time in this case, than in the preceding case in which a higher inductance and higher pressure prevails.
  • the duration of the opening pulse J for the injection valves becomes matched to the pressure of the internal combustion engine.
  • the fuel quantity to be injected must be varied as a function of rotational speed, in addition to the magnitude of vacuum pressure.
  • the regulating and control circuit of FIG. 1 has an additional control circuit A, through which the voltage prevailing between the circuit junction H and the negative voltage supply line 30 become periodically varied in rhythm to the injection processes.
  • a control voltage U, shown in H6. 2 has a function of time, is produced by the control circuit.
  • This control circuit U is composed exclusively of exponential parts and sections of constant instantaneous values.
  • the control circuit A includes a first transistor T with base connected to the positive voltage supply line 23, through a resistor R
  • the series circuit of a capacitor C and resistor 39 is connected between the circuit junction G and the base of the transistor T,.
  • a resistor 27 is connected between the same circuit junction G and the positive voltage supply line 23.
  • the circuit junction G corresponds to the collector of the transistor 13.
  • a second transistor T Similar to the first switching transistor T, a second transistor T has its emitter connected to the negative voltage supply line 30, and its base connected to the collector of the transistor T through a coupling resistor 40.
  • Two resistors R and R are connected in series and between the collector of transistor T and the positive voltage supply line 23.
  • the junction between these two resistors R and R, is connected to the cathode of a diode D
  • the collector of the transistor T furthermore, is connected to a resistor 41 which, in turn, is connected in series with a capacitor C,
  • One electrode of this capacitor C is connected to the base of a third transistor T
  • This transistor T as well as a fourth transistor T are of the PNP-type.
  • the emitters of both of these transistors T and T are connected to the positive voltage supply line 23.
  • the base of the transistor T is connected, through a resistor, R to the negative voltage supply line 30.
  • the transistor T has, thereby, the tendency to be conducting in the quiescent state of the control circuit, as does the transistor T,.
  • This transistor also has its base connected to the negative voltage supply line 30, through a resistor R Both of these transistors form source of charge through their different internal resistances, and they feed a common storage capacitor C,.
  • the control voltage U shown in FIG. 2, appears across this storage capacitor C This control voltages is applied to the circuit junction H of the secondary winding 22, through a transistor T which operates as an emitter follower.
  • Two resistors R,, and R, are arranged between the collector of the transistor T, and the negative voltage supply line 30.
  • One terminal of a resistor R,, is connected to the junction of the two resistors R,, and R,,, whereas the other terminal of the resistor R,,, is connected to the anodes of two diodes D, and D
  • the cathode of the diode D is connected to one electrode of the capacitor C,, and also to the anode of the diode D,.
  • the cathode of the diode D is connected to the junction of two resistors R,, and R,,, which form a voltage divider.
  • the anode of a diode D is connected directly to the collector of a transistor T while the cathode of this diode D leads to the negative voltage supply line through a resistor -R,,,.
  • the cathode of the diode D is also connected to the base of the transistor T,, through a capacitor C Analogous to the transistor T,,, a series circuit of two resistors R,,, and R,, is connected between the collector of the transistor T, and the negative voltage supply line 30.
  • a resistor R,, is connected, with one terminal, to the junction of resistors R,, and R,,.
  • the other terminal of the resistor R,, is connected to the anodes of two diodes D, and D,,,.
  • the cathode of the diode D is connected to the cathode of the diode D,, as well as to the base of the transistor T and one electrode of the storage capacitor C,.
  • the cathode of the diode D is connected directly to the collector of the transistor T,,.
  • the control circuit A moreover, includes two further voltage dividers of which one divider consists of resistors R,, and R The junction of these two resistors R,, and R is connected to a further resistor R,, which leads to the anodes of two diodes D, and D
  • the other voltage divider consists of resistors R,, and R,,, with the junction between these two resistors is connected to the cathode of a diode D
  • the cathode of the diode D is connected to the capacitor C,.
  • This residual voltage is determined through the magnitudes of the resistors R, and R, which constitute a voltage di vider.
  • the transistor T becomes again conducting at the instant of time T, after the capacitor C, has again been charged, the transistor T becomes cut off.
  • the diode D is also then nonconducting, and the discharge of the storage capacitor C, is terminated.
  • the transistor T returns to its cutoff or nonconducting state, a positive step voltage appears at the collector of this transistor.
  • This stop voltage is, in turn, transmitted to the base of the transistor T,,, through the coupling capacitor C
  • the transistor T remains thereby nonconducting until the capacitor C, has become charged, through the resistor R to the extent that base current again prevails at the transistor T,. This occurs at the instant of time t,.
  • the nonconducting transistor T has a negative potential applied to its collector through the resistors R,, and R,,.
  • the diode D is nonconducting.
  • the potential of the circuit junction P between the resistor R,, and the diode D is maintained at negative potential, through the diode D,,.
  • the diode D is thereby also nonconducting.
  • the charging of the storage capacitor C result thereafter from the instant of time t,, only through the resistor R,, and the diode D
  • the voltage U, across the storage capacitor C then tends toward a voltage limit U,, with a time constant T, This time constant is the product of the capacitance of the storage capacitor C, and the magnitude of the resistor R,,.
  • the voltage limit U is determined by the voltage divider with the resistors R,, and R When the voltage U, has attained the value U,,, through the voltage-dividing resistors R and R,,, at the instant of time t, then the diode D becomes conducting.
  • the voltage U is determined through the relative magnitudes of the resistors R,, and R,, which constitute a voltage divider. With the diode D made conducting, charging current is prevented to the capacitor C,, through the diode D,. From the instant of time t to the instant of time t at which point the transistor T is again conducting, because the coupling capacitor C, has then become sufficiently charged, the voltage U, across the capacitor C, remains at the constant value U,
  • the duration between the ends of one opening pulse and the end of a subsequent opening pulse is larger than the interval between time F0 to t shown in FIG. 2.
  • the end of the next opening pulse therefore, becomes determined through the control voltage U,, beginning with the portion T, at the instant t,.
  • the end of the subsequent opening pulse is represented through the time instant t,.
  • a new period begins at that instant of time, in which the control voltage runs in the same manner as between the time instant t to the instant t,. This situation applies for as long as the low rotational speed is maintained.
  • the spacing of the time instant t, from the instant t#), at which point the period begins. is chosen to be so small that it is smaller than the shortest period of injection which prevails at maximum rotational speed.
  • FIG. 2 The curve shown in FIG. 2 as a function of time and representing the control voltage U, has exclusively the increasing tendency and to thereby deliver longer injection pulses with rise in engine speed, when all other parameters and conditions remain the same.
  • FIG. 3 a modified control arrangement is shown in FIG. 3, which can be used in place of the control circuit A in FIG. 1.
  • This arrangement of FIG. 3 can then provide a control voltage which has an increasing function as well as decreasing characteristics.
  • the control voltage curve of the arrangement of FIG. 3 is shown in FIG. 4 as a function of time. Components in the control arrangement of FIG. 3 which are the same as those in the control circuit A in FIG. 1, are denoted by the same reference numeral.
  • a second storage capacitor C is used for the arrangement of FIG. 3. This capacitor C produces the decreasing charac teristics at the beginning of the control voltage curve shown in FIG. 4.
  • This second storage capacitor C is connected, through a diode D,, to the base of a transistor T operating in the form of an emitter follower.
  • the capacitor C thereby, functions as a parallel component to the capacitor C which is connected to the base of this transistor T through an additional diode D,;,.
  • a third voltage may be applied to the transistor T to the diode D This third voltage is taken or tapped from the junction of two resistors R and R forming a voltage divider.
  • the capacitor C can then charge exponentially, through the diode D,,, in accordance with FIG. 4.
  • the capacitor can then become charged to a maximum value of U, which is determined through the relative magnitudes of the two resistors R and R which form a voltage divider.
  • the turned-off state of the transistor T is maintained until the time instant t,, as described in the preceding embodiment.
  • the capacitor C has discharged to the extent that sufficient current can flow through the emitterbase path of the transistor T, so as to make this transistor again conducting.
  • the conducting transistor T then short circuits the voltage-dividing resistor R through the diode D which also conducts.
  • the diode D is nonconductlng and the second storage capacitor can discharge, from the time instant t,, through the parallel resistor R
  • This discharge process takes place with a time constant T,., which depends upon the capacitance value of the capacitor C,, and the magnitude of the resistor R From the instant of time t, the voltage across the capacitor C, drops below the value U which is determined by the voltage-dividing resistors R and R As a result, the control voltage maintains this voltage value from the time instant t,
  • the storage capacitor C becomes charged, through the resistor R, and the diode D from the instant of time t,.
  • the voltage across the storage capacitor then attains the set value U., which is established by the resistors R and R forming a voltage divider. This voltage value across the storage capacitor is attained at the instant of time t,,,.
  • the circuit arrangement shown in FIG. 5 is used for generating the characteristic of the control voltage U, shown in FIG. 6.
  • This circuit of FIG. 5 takes the place of the circuit bordered by broken lines in FIG. 1, at the base of the circuit junction H of the secondary winding of the transformer 15.
  • This circuit of FIG. 5 includes an input transistor T, which is connected, through a capacitor C,, to the collector of the input transistor 13 of the multivibrator 12. Such interconnection of the transistor T, is accomplished through a coupling resistor 35, not shown in FIG. 5.
  • the base of the transistor T is connected to the positive voltage supply line 23, through a resistor R,.
  • the collector of transistor T is connected to one tenninal of a resistor R whereas the other terminal of this resistor is connected also to the positive voltage supply line 23.
  • Another resistor R is connected between the same voltage supply line 23 and the base of the transistor T
  • a capacitor C is connected between the collector of transistor T, and the base of transistor T In the quiescent state of the circuit, the transistor T is maintained in the conducting state.
  • the collector of the transistor T is connected to a voltage divider formed by resistors R and R connected in series. This series connected combination of resistors is further connected between the positive voltage supply line 23 and the collector of the transistor T
  • the cathode of a diode D is also connected to this collector of transistor T,,.
  • the anode of the diode D is, on the other hand, connected to the junction of two resistors R and R which are connected in series and between the positive and negative voltage supply lines 23 and 30, respectively.
  • One terminal of the resistor R furthermore, is connected to the anode ofthe diode D
  • a fuel injection control arrangement for an internal combustion engine comprising, in combination, electromagnetically controlled fuel injection valve means; monostable multivibrator means connected to said valve means and applying pulse signals to said valve means, the duration of said pulse signals determining opening time interval of said valve means; control voltage-generating means connected to said monostable multivibrator means for generating a control voltage to vary said duration of said pulse signals as a function of the speed of said engine, said control voltage having a characteristics variable periodically in synchronism with said pulse signals; storage capacitor means in said control voltagegenerating means for integrating said control voltage as a a function of time; at least two charging sources connected to said capacitor means and having different internal resistances; and switching means connected to said charging sources for connecting said sources in predetermined sequence to said capacitor means.
  • said monostable multivibrator means has an input transistor and an output transistor.
  • discharge means connected to said storage capacitor means and comprising a discharge diode; and a transistor with emitter-collector path connected in series with said discharge diode.
  • At least of said charging sources comprises a transistor; a diode connected to said transistor and said charging capacitor means; and coupling capacitor means connected to said transistor.
  • the arrangement as defined in claim 16 including a source of operating voltage; and a first resistor connected between the emitter of said emitter-follower and said source of operating voltage.
  • said storage capacitor means comprises two storage capacitors; and a diode connected between said two storage capacitors for the coupling said storage capacitors, the storage capacitor having the more positive voltage being operative and the other capacitor being inoperative.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
US67851A 1969-09-04 1970-08-28 Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines Expired - Lifetime US3620196A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691944878 DE1944878A1 (de) 1969-09-04 1969-09-04 Steuereinrichtung fuer eine Benzineinspritzanlage mit elektronischer,drehzahlabhaengiger Spritzdauer-Korrektur

Publications (1)

Publication Number Publication Date
US3620196A true US3620196A (en) 1971-11-16

Family

ID=5744604

Family Applications (1)

Application Number Title Priority Date Filing Date
US67851A Expired - Lifetime US3620196A (en) 1969-09-04 1970-08-28 Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines

Country Status (5)

Country Link
US (1) US3620196A (de)
CH (1) CH513332A (de)
DE (1) DE1944878A1 (de)
FR (1) FR2030872A5 (de)
GB (1) GB1262249A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3732852A (en) * 1971-07-01 1973-05-15 Gen Motors Corp Electronic fuel injection system having speed enrichment
US3747575A (en) * 1970-03-28 1973-07-24 Bosch Gmbh Robert Load dependent control circuit for a gasoline fuel injection unit
US3786789A (en) * 1971-11-15 1974-01-22 Gen Motors Corp Electronic fuel injection system having coarse and fine speed compensation
US3881458A (en) * 1972-09-13 1975-05-06 Bosch Gmbh Robert Ignition system dependent upon engine speed
US3929108A (en) * 1970-08-24 1975-12-30 Louis A Monpetit Electronic control systems for internal combustion engines
US3946704A (en) * 1973-06-27 1976-03-30 Louis Monpetit Apparatus for controlling transient occurrences in an electronic fuel injection system
US4015563A (en) * 1974-09-23 1977-04-05 Robert Bosch G.M.B.H. Stabilized fuel injection system
US4084562A (en) * 1972-08-08 1978-04-18 Robert Bosch Gmbh Fuel metering device
USRE29862E (en) * 1972-09-13 1978-12-19 Robert Bosch Gmbh Ignition system dependent upon engine speed
US4180025A (en) * 1976-02-10 1979-12-25 Robert Bosch Gmbh Fuel injection system
US4196702A (en) * 1978-08-17 1980-04-08 General Motors Corporation Short duration fuel pulse accumulator for engine fuel injection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283762A (en) * 1979-10-09 1981-08-11 Ford Motor Company Analog computer circuit for controlling a fuel injection system during engine cranking
GB2146456A (en) * 1983-07-11 1985-04-17 Figueiredo Nuno R M Method and arrangement for controlling the combustion process in an internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2883976A (en) * 1956-11-16 1959-04-28 Bendix Aviat Corp Method of adjusting fuel injector valves
US2886015A (en) * 1956-10-26 1959-05-12 Bosch Gmbh Robert Fuel injection arrangement
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines
US3521606A (en) * 1967-10-21 1970-07-28 Bosch Gmbh Robert Fuel injection control arrangement for internal combustion engines
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2886015A (en) * 1956-10-26 1959-05-12 Bosch Gmbh Robert Fuel injection arrangement
US2883976A (en) * 1956-11-16 1959-04-28 Bendix Aviat Corp Method of adjusting fuel injector valves
US3429302A (en) * 1966-08-24 1969-02-25 Bosch Gmbh Robert Arrangement for controlling the injection of fuel in engines
US3521606A (en) * 1967-10-21 1970-07-28 Bosch Gmbh Robert Fuel injection control arrangement for internal combustion engines
US3533381A (en) * 1968-05-24 1970-10-13 Bosch Gmbh Robert Temperature sensitive control circuit for internal combustion engines having a fuel injection system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747575A (en) * 1970-03-28 1973-07-24 Bosch Gmbh Robert Load dependent control circuit for a gasoline fuel injection unit
US3929108A (en) * 1970-08-24 1975-12-30 Louis A Monpetit Electronic control systems for internal combustion engines
US3732852A (en) * 1971-07-01 1973-05-15 Gen Motors Corp Electronic fuel injection system having speed enrichment
US3786789A (en) * 1971-11-15 1974-01-22 Gen Motors Corp Electronic fuel injection system having coarse and fine speed compensation
US4084562A (en) * 1972-08-08 1978-04-18 Robert Bosch Gmbh Fuel metering device
US3881458A (en) * 1972-09-13 1975-05-06 Bosch Gmbh Robert Ignition system dependent upon engine speed
USRE29862E (en) * 1972-09-13 1978-12-19 Robert Bosch Gmbh Ignition system dependent upon engine speed
US3946704A (en) * 1973-06-27 1976-03-30 Louis Monpetit Apparatus for controlling transient occurrences in an electronic fuel injection system
US4015563A (en) * 1974-09-23 1977-04-05 Robert Bosch G.M.B.H. Stabilized fuel injection system
US4180025A (en) * 1976-02-10 1979-12-25 Robert Bosch Gmbh Fuel injection system
US4196702A (en) * 1978-08-17 1980-04-08 General Motors Corporation Short duration fuel pulse accumulator for engine fuel injection

Also Published As

Publication number Publication date
DE1944878A1 (de) 1971-03-11
FR2030872A5 (de) 1970-11-13
CH513332A (de) 1971-09-30
GB1262249A (en) 1972-02-02

Similar Documents

Publication Publication Date Title
US3338221A (en) Electrical control device
US3570460A (en) Control system for blocking fuel injection in an internal combustion engine
US3620196A (en) Arrangement for applying fuel injection corrections as a function of speed, in internal combustion engines
US3430616A (en) Fuel injection control system
US3280809A (en) Ignition arrangement for internal combustion engines
US3483851A (en) Fuel injection control system
US3937193A (en) Electronic ignition system
US3522794A (en) Electronically controlled injection system for an internal combustion engine
US3745985A (en) Arrangement for preventing current flow in the ignition coil of an internal combustion engine during standstill conditions
SU442614A1 (ru) Система подачи топлива в двигатель внутреннего сгорани
GB1250523A (de)
CA1109928A (en) Ignition dwell circuit for an internal combustion engine
US3559629A (en) Static lead correction device for the ignition of an internal combustion engine
US3566846A (en) Electronically controlled fuel injection arrangement for internal combustion engines
US3855973A (en) Synchronizing means for sequential fuel injection
US3515104A (en) Electromagnetically controlled fuel injection arrangement for internal combustion engines
US3521606A (en) Fuel injection control arrangement for internal combustion engines
US3429302A (en) Arrangement for controlling the injection of fuel in engines
GB904461A (en) Improvements in or relating to fuel injection systems for internal combustion engines
US3470854A (en) Fuel injection system for internal combustion engines
US3526212A (en) Electronic control system for controlling the direct or indirect fuel injection in motors as a function of motor speed
US3822678A (en) High speed fuel injection system
US3241538A (en) Electronic ignition system
US3682144A (en) Control device for fuel supply in internal combustion engines
US2941519A (en) Fuel injection system