US3587552A - Automatic advance electronic ignition device for internal combustion engines - Google Patents

Automatic advance electronic ignition device for internal combustion engines Download PDF

Info

Publication number
US3587552A
US3587552A US780046A US3587552DA US3587552A US 3587552 A US3587552 A US 3587552A US 780046 A US780046 A US 780046A US 3587552D A US3587552D A US 3587552DA US 3587552 A US3587552 A US 3587552A
Authority
US
United States
Prior art keywords
engine
transistor
voltage
probe
oscillating assembly
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
US780046A
Other languages
English (en)
Inventor
Bernard Varaut
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger SA
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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Application granted granted Critical
Publication of US3587552A publication Critical patent/US3587552A/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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/155—Analogue data processing
    • F02P5/1551—Analogue data processing by determination of elapsed time with reference to a particular point on the motor axle, dependent on specific conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/155—Analogue data processing
    • F02P5/1553—Analogue data processing by determination of elapsed angle with reference to a particular point on the motor axle, dependent on specific conditions
    • F02P5/1555—Analogue data processing by determination of elapsed angle with reference to a particular point on the motor axle, dependent on specific conditions using a continuous control, dependent on speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the electronic automatic ignition advance adjustment device for internal combustion engine comprises conductor elements spaced out and moved by said engine depending on its rotation speed, an electromagnetic probe P detecting the passage of said conductor elements, an oscillating assembly connected to said probe, an ignition coil connected, on the one hand, to at least one spark plug of said engine and to said oscillating assembly, and means for modifying the time for setting up the stable oscillatory rating of said oscillating assembly in agreement with the speed of the engine.
  • the present invention has for its object a device enabling an automatic ignition advance in internal combustion engines, particularly for motor vehicles, characterized in that it enables a zero ignition advance to be obtained for very low rotation speeds of the engine shaft, this advance increasing when the speed of said shaft increases up to a certain value, beyond which the advance remains practically constant.
  • the automatic ignition advance of the invention essentially comprises a metal cam or similar device integral with the engine shaft and comprising a projection, said cam cooperating with a pickup made by a detector coil surrounding a magnetic core, a coil whose excess voltage coefficient variations caused by the passing of the projection of the cam in front of the coil of the pickup, when the cam rotates, are used for modifying the amplitude of the oscillations of a resonant circuit electronic oscillator.
  • Pickup, called proximity" and detecting the passage of electrically conducting objects have already been described in French Pat. No. 1,482,206 and it is with reference to a pickup of this kind that the device according to the invention is described in that which follows.
  • means have been devised for causing the time taken by the oscillations to vary and to reestablish themselves in a stable manner in the pickup circuit when the projection of a metal cam rotatively driven by the shaft of an internal combustion engine, is withdrawn from the magnetic core of the pickup, these means having the object of obtaining an ignition advance curve which will show a zero value of the ignition for very low rotation speeds of the shaft of the engine, and a value which increases progressively when the speed of said shaft increases up to a certain value, beyond which the advance becomes practically constant.
  • FIG. 1 is a diagrammatic perspective of an internal combustion engine comprising the device according to the invention.
  • FIG. 2 is an ignition advance curve as a function of the rotation speed of the engine shaft, this curve being obtained by the device of the invention.
  • FIG. 3 is a diagram-block showing the assembly of the device of the invention.
  • FIG. 4 is a detailed circuit diagram of an embodiment of the ignition device according to the invention.
  • FIG. 5 is a curve showing the time variations for effecting oscillation as a function of the various parameters.
  • FIG. 6 is a view in elevation showing a modified embodiment of the conductor element mounted on the flywheel of the engine which controls the oscillator.
  • FIG. 1 there is shown diagrammatically a four-cylinder engine 1 in each of which a piston 2 slides whose connectingrod 3 is jointed at its foot on one of the crankpins 4 of the crankshaft 5 rigidly attached to a flywheel 6 and also to a distributing device 7 which is functions direct, in a given order, the current pulses produced from the device of the invention, designated on the whole by 8, towards each spark-plug 9.
  • the device 8 is, in this example, connected to a probe P which forms part of it and functions to detect the successive passage of the two circumferentially spaced arcuate conductor elements II and I2 carried by the flywheel 6. In this manner, two current pulses are produced setting up two sparks by two distinct plugs for each revolution of the crankshaft 5, as would be the case for a four-cylinder engine operating according to a four-stroke cycle.
  • the angle a of ignition advance is obviously the angle existing at the moment when the spark is produced between the position of one ofthe crankpins of the crankshaft and that which it then assumes when the piston to which it is attached is at top dead center corresponding to the end of the compression stroke of the fuel mixture contained in the cylinder.
  • the circuit X designates a tuned oscillator which receives, at its input, data coming from a probe P detecting the passage of the conducting parts 11, 12 of the flywheel 6, whereby said parts 11 and 12 function as a switch interrupting the oscillations of the oscillator at a rate which depends upon the speed of the engine.
  • the conducting part 11 is shown.
  • the probe P comprises a winding I. and a magnetic core 13 forming a self-inductance which may have various shapes, for instance, that of an airgap magnetic circuit.
  • the core 13 is placed in the vicinity of the rotary path of the conducting parts 11 and 12.
  • the oscillator X is connected by an output to an amplifier W leading to a monostable flip-flop 2 which also receives a variable voltage coming from a frequency to voltage converter Y so that said flip-flop Z allows-0r does not allows-the current to pass coming from a supply source S towards a control device 0 of the ignition coil R supplying the distributor 7.
  • the coil L of the probe P forms with a condenser C, an oscillating circuit whose resonance frequency has for its value Arr LC,.
  • C is a linkage condenser which forms a counterreaction loop with a counterreaction resistance R,, connected, on the one hand, to a top A of the coil L, and, on the other, to the emitter of a transistor T.
  • a diode D rectifies at the point B the alternating voltage coming from the oscillating circuit L-C,.
  • a condenser C filters the output current of the transistor T.
  • Resistances R and R, as well as a diode D form a polarization circuit of the base of the transistor T.
  • a terminal S of the circuit described above is connected up by means of a resistance R to one of the poles of a direct voltage source S, which is the accumulator battery of the motor vehicle for instance, whose other pole is connected to the earth M of said vehicle.
  • T designates a transistor whose collector, by means of a resistance R, is connected up to the input terminal I of the oscillator X described above, whereas its emitter is connected up to the other input terminal N which is the earth connection of said oscillator X.
  • the base of the transistor T is connected to the converter Y, which itself is connected by a conductor 14 to the output 15 of the monostable flip-flop Z.
  • the converter Y comprises a condenser C, and a resistance R, which are parallely mounted between the earth M and conductor 14, downstream of a diode D, thus forming the biasing for the base circuit of transistor T.
  • the frequency of the signals coming from the monostable flip-flop 2 as explained in that which follows, is converted into a voltage which depends from this frequency to make the transistor T' pass, or not.
  • the input 16 of the monostable flip-flop Z is connected to the output of the amplifier W whose input is connected to the output S terminal of the oscillator X.
  • the amplifier W comprises a transistor T, whose base is connected to the output S of the oscillator X, the emitter-collector circuit of this transistor being connected by a condenser C, for coupling to the input 16 of the monostable flip-flop Z.
  • a diode D is advantageously provided, being interposed between the condenser C and the earth M, so that only one of the amplified alternates of the oscillator X is applied to the input of the monostable flip-flop Z.
  • the monostable flip-flop Z which comprises the commonemitter transistors T and T and associated in a known manner to a condenser C comprises a second output 17 connected to a control circuit Q for the ignition coil.
  • the circuit Q is made under the form of an amplifier incorporating transistors T,, T, mounted in tandem on the terminals of the source S, the emitter-collector circuit of the second transistor T,,, which is a power transistor, incorporating the primary of the coil R whose secondary is connected to the distributor 7 of FIG. 3.
  • the oscillator X During the passage of the conducting part 11 in front of the coil L of the-probe P, the oscillator X is obviously blocked, so that its output voltage is zero. During the rest of the revolution of the flywheel 6, the oscillator X oscillates and thus supplies output pulses which are converted after amplifying in the amplifier W by the monostable flip-flop Z into square waves of constant height and length. These voltage square waves are applied by the conductor 14 to the converter Y which converts the succession of these square waves into a voltage which is obviously a function of the rotation speed N of the engine shaft (a function approaching the form: (A-i-B/N). This voltage supplies the base of the transistor T. This transistor is thus passing for speeds N of less than a predetermined value, for instance N,, and is blocked beyond this value.
  • the transistor T When the transistor T becomes conductive, it shunts the resistance R, by the resistance R and thus lowers the polarization voltage at the point B, i.e., at the base of the transistor T.
  • the polarization voltage V of the base of the transistor T is fixed, on the one hand, for a given value of the source voltage S, by the resistances R R, and R and the diode D and, on the other hand, by a residual discharge voltage that can eventually subsist at the terminals of the condenser C v.,,, is the voltage level v., which it is necessary to attain so that the oscillatory rating of the oscillator X is stable.
  • This slope depends on the values R, and C
  • the values R, and C are determined by the shape and length of the conducting part 11 with a view to obtaining the advance curve of FIG. 2, that is most suited to the type of engine 1, and consequently, R,, and C are fixed, so that the slope 1gp is constant according to the type of engine selected.
  • FIGS. 3 and 4 works as follows:
  • probe P conducting part 11
  • Electronic automatic ignition advance adjustment device for internal combustion engine comprising conductor elements spaced apart and moved by said engine depending on the rotation speed thereof, the number of said conductor elements being in relation to the number of cylinders of said engine and the thermic cycle thereof, an oscillating assembly comprising a probe composed of a self-inductance and a capacitance in parallel relationship, said assembly being tuned to oscillate in the absence of a conductor element passing in the vicinity whereby the probe may detect the passage of said conductor elements by blocking of the oscillating assembly at each passage of said conductor elements, an ignition coil having two windings, a first winding being connected to at least one spark plug of said engine and a second winding being connected to said oscillating assembly, and means connected to said oscillating assembly for modifying the time for setting up the stable oscillatory working condition thereof in accordance with the speed of the engine so that a spark is produced at said spark-plug only when said stable oscillatory condition is reached, said means for modifying the time for setting up the stable oscillatory condition of the oscil
  • said means for adjusting the position of said conductor elements in relation to said probe comprises means resiliently mounting said conductor elements on a rotational element of the engine to effect movement thereof with respect to the axis of rotation of said element as a result of centrifugal force which is itself a function of the rotation speed of the engine.
  • said oscillating as sembly comprises at least one transistor having its emitterbase circuit connected to said probe and biasing resistance in the base circuit, at least one capacitor being provided between said probe and the base of said transistor, said frequency-tovoltage converter comprising at least one output transistor whose collector-emitter circuit is connected to the base of said transistor of the oscillating assembly, whereby the voltage produced by said converter renders said output transistor conductive for a speed below the speed threshold of said engine, said output transistor of the converter then shunting said biasing resistance of the transistor of said oscillating assembly and delaying the setting up of said stable oscillatory rating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US780046A 1967-11-30 1968-11-29 Automatic advance electronic ignition device for internal combustion engines Expired - Lifetime US3587552A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR130310 1967-11-30

Publications (1)

Publication Number Publication Date
US3587552A true US3587552A (en) 1971-06-28

Family

ID=8642500

Family Applications (1)

Application Number Title Priority Date Filing Date
US780046A Expired - Lifetime US3587552A (en) 1967-11-30 1968-11-29 Automatic advance electronic ignition device for internal combustion engines

Country Status (4)

Country Link
US (1) US3587552A (bs)
DE (1) DE1811694A1 (bs)
FR (1) FR1555752A (bs)
GB (1) GB1255333A (bs)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736463A (en) * 1970-06-05 1973-05-29 Magneti Marelli Spa Electronic device for controlling a silicon controlled rectifier in a capacitor discharge electronic ignition circuit
US3765391A (en) * 1971-02-22 1973-10-16 W Cook Transistorized ignition system
US3831571A (en) * 1973-05-11 1974-08-27 Motorola Inc Variable dwell ignition system
US3841288A (en) * 1970-09-05 1974-10-15 Philips Corp Ignition system for internal combustion engines
US3882835A (en) * 1972-03-24 1975-05-13 Schlumberger Compteurs Electric pulse generating apparatus for internal combustion engines
US3894525A (en) * 1973-03-23 1975-07-15 Bosch Gmbh Robert Transistorized magneto ignition system for internal combustion engines
US3923029A (en) * 1973-05-18 1975-12-02 Benito Polo Electronic ignition system
USB480473I5 (bs) * 1974-06-18 1976-03-02
US4126112A (en) * 1976-02-27 1978-11-21 Eltra Corporation Breakerless electronic ignition system
US4164204A (en) * 1975-08-18 1979-08-14 Societe Anonyme Pour L'equipement Electrique Des Vehicules S.E.V. Marchal Simplified method and apparatus for assuring periodic control of the timing of an internal combustion engine
US4176644A (en) * 1976-10-27 1979-12-04 Robert Bosch Gmbh Engine ignition system with variable spark internal duration
US4188929A (en) * 1976-08-17 1980-02-19 Robert Bosch Gmbh Internal combustion engine magneto-type ignition system with electronically controlled spark advance
DE3000627A1 (de) * 1979-01-10 1980-07-24 Hitachi Ltd Zuendanlage fuer brennkraftmaschine
US4494519A (en) * 1981-10-01 1985-01-22 Mitsubishi Denki Kabushiki Kaisha Ignition system for internal combustion engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156524A (en) * 1984-03-22 1985-10-09 Cambridge Electronic Ind Tachogenerators

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3736463A (en) * 1970-06-05 1973-05-29 Magneti Marelli Spa Electronic device for controlling a silicon controlled rectifier in a capacitor discharge electronic ignition circuit
US3841288A (en) * 1970-09-05 1974-10-15 Philips Corp Ignition system for internal combustion engines
US3765391A (en) * 1971-02-22 1973-10-16 W Cook Transistorized ignition system
US3882835A (en) * 1972-03-24 1975-05-13 Schlumberger Compteurs Electric pulse generating apparatus for internal combustion engines
US3894525A (en) * 1973-03-23 1975-07-15 Bosch Gmbh Robert Transistorized magneto ignition system for internal combustion engines
US3831571A (en) * 1973-05-11 1974-08-27 Motorola Inc Variable dwell ignition system
US3923029A (en) * 1973-05-18 1975-12-02 Benito Polo Electronic ignition system
US3995608A (en) * 1974-06-18 1976-12-07 Hitachi, Ltd. Ignition timing control system for internal combustion engine
USB480473I5 (bs) * 1974-06-18 1976-03-02
US4164204A (en) * 1975-08-18 1979-08-14 Societe Anonyme Pour L'equipement Electrique Des Vehicules S.E.V. Marchal Simplified method and apparatus for assuring periodic control of the timing of an internal combustion engine
US4126112A (en) * 1976-02-27 1978-11-21 Eltra Corporation Breakerless electronic ignition system
US4188929A (en) * 1976-08-17 1980-02-19 Robert Bosch Gmbh Internal combustion engine magneto-type ignition system with electronically controlled spark advance
US4176644A (en) * 1976-10-27 1979-12-04 Robert Bosch Gmbh Engine ignition system with variable spark internal duration
DE3000627A1 (de) * 1979-01-10 1980-07-24 Hitachi Ltd Zuendanlage fuer brennkraftmaschine
US4292942A (en) * 1979-01-10 1981-10-06 Hitachi, Ltd. Ignition system for internal combustion engines
US4494519A (en) * 1981-10-01 1985-01-22 Mitsubishi Denki Kabushiki Kaisha Ignition system for internal combustion engine
US4561411A (en) * 1981-10-01 1985-12-31 Mitsubishi Denki Kabushiki Kaisha Ignition system for internal combustion engine

Also Published As

Publication number Publication date
GB1255333A (en) 1971-12-01
DE1811694A1 (de) 1969-10-16
FR1555752A (bs) 1969-01-31

Similar Documents

Publication Publication Date Title
US3587552A (en) Automatic advance electronic ignition device for internal combustion engines
US4153019A (en) Peak cylinder combustion pressure ignition spark timing system
JPH0320545Y2 (bs)
US3910243A (en) Electronic spark timing advance and emission control system
US4270509A (en) Breakerless ignition system
US3545420A (en) Capacitor discharge ignition system
US6932064B1 (en) Capacitor discharge ignition
US3515109A (en) Solid state ignition with automatic timing advance
US4175509A (en) Magneto ignition system for an internal combustion engine
US3034018A (en) Transistorized breakerless ignition system
CA1238079A (en) Igniton device for an i.c. engine
US3974815A (en) Signal source for use in a breakerless ignition system for an internal combustion engine
US3783850A (en) Ignition advance circuit
US5009208A (en) Engine speed limiter
US4174697A (en) System for advancing the ignition time in ignition systems having a magneto generator
US4188930A (en) Breakerless flywheel magneto ignition system
US3060346A (en) Electronic ignition control system for internal combustion engines
US4295070A (en) Means for providing a mechanically definable selected trigger interval in a flywheel magneto
US3838671A (en) Ignition circuit with automatic spark advance
US4606323A (en) Magneto for ignition system
US4178892A (en) Speed-dependent ignition time advancement apparatus in magneto generator ignition systems
JPH08506403A (ja) 特にチェンソー等に使用される内燃機関の点火装置
US4157702A (en) Automatic ignition timing advancing device in ignition system
US3797471A (en) Breakerless trigger circuit with variable dwell for ignition systems
US4126112A (en) Breakerless electronic ignition system