US3915131A - Ignition system for internal combustion engines - Google Patents

Ignition system for internal combustion engines Download PDF

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Publication number
US3915131A
US3915131A US411522A US41152273A US3915131A US 3915131 A US3915131 A US 3915131A US 411522 A US411522 A US 411522A US 41152273 A US41152273 A US 41152273A US 3915131 A US3915131 A US 3915131A
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United States
Prior art keywords
disk
markings
sensor means
ignition
internal combustion
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Expired - Lifetime
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US411522A
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English (en)
Inventor
Heinrich-Josef Brungsberg
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BBC Brown Boveri AG Germany
BBC Brown Boveri France SA
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BBC Brown Boveri France SA
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Priority claimed from DE19722255044 external-priority patent/DE2255044C3/de
Application filed by BBC Brown Boveri France SA filed Critical BBC Brown Boveri France SA
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Publication of US3915131A publication Critical patent/US3915131A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F02P7/0675—Electromagnetic pick-up devices, e.g. providing induced current in a coil with variable reluctance, e.g. depending on the shape of a tooth

Definitions

  • the ignition coil of an ignition system for internal combustion engines is provided with means for determining precisely t'he point of time of initiation of coil energization and with means for determining precisely the point of time of energy release, or coil deenergization. This is achieved. by a disk rotating in synchronism with the internal combustion engine, markings on said disk and fixed sensor means for reading said markings as they are moved past said sensor means, and discriminator means having a predetermined threshold receiving the output of said sensor means and emitting signals whose timing is a function of the rpm at which said disk rotates past said sensor means.
  • This invention relates to ignition systems for internal combustion engines, and more particularly to means for determining the point of time at which storage of the energy required for ignition is to begin, and for determining the point of time at which the stored energy is to be released.
  • the current of the ignition coil may be controlled by semiconductor switching devices, so that the contacts of the interrupter have to carry and interrupt but the relatively small control current required by such switching devices.
  • semiconductor switching devices for controlling the current which flows through the ignition coil.
  • capacitor ignition systems In capacitor ignition systems the energy required for ignition is initially stored inductively in an intermediate storage means, and transferred immediately thereafter to an ignition capacitor. There the energy required for ignition is stored virtually without any loss, until needed and released.
  • One particularly desirable feature of such ignition systems resides in the fact that the current supplied to the inductive intermediate storage means may be limited to the extent dictated by ignition energy requirements. In other words, since inductive intermediate storage means do not require a holding current as conventional ignition coils do, and since at small numbers of revolution that current is a significant portion of the total current carried by conventional ignition coils, capacitor ignition systems are a considerable improvement over conventional ignition coil ignition systems. Capacitor ignition systems are, however, subject to a serious drawback consisting in that the du ration of the igniting sparks thereof is very short, and in some instances too short to effect ignition of the combustible air and gas mixture.
  • a predetermined quantum of ignition energy this calls for a predetermined period of time following closing of circuit of the coil.
  • the aforementioned predetermined period of time depends upon the inductance of the coil. If the required quantum of energy is stored, but not yet needed at the pointof time storage is completed, the flow of current must continue. This continued flow of current is referred-to as holding current.
  • the holding current is eliminated if the circuit of the ignition coil is closed at precisely such a point of time that the storage of the required quantum of ignition energy will be completed at the very instant when the ignition energy is needed.
  • a system embodying this invention for determining the time of initiation of inductive energy storage in the ignition coil of an ignition system for internal combustion engines includes a rotatable disk driven to rotate in synchronism with an internal combustion engine, markings on said disk and fixed sensor means for reading said markings when said markings are moved past said sensor means, and discriminator means having-a predetermined threshold receiving the output of said sensor means and emitting signals whose timing is a function of the number of rpm at which said disk rotates past said sensor means.
  • the markings on said disk are formed by lines arranged adjacent the periphery thereof and having a progressively increasing angular pitch in the direction of rotation of said disk, and the discriminator means are formed by coincidence means having two variable inputs derived from said sensor means and yielding an output in case of coincidence of said two variable inputs.
  • FIG. 1 is a diagrammatic representation of a first embodiment of the present invention
  • FIG. 2 is a table of data relevant to the present inven tion
  • FIG. 3, 4 and 5 are diagrammatic representations of other embodiments of the present invention.
  • FIG. 1 shows a rotatable disk including four quadrants I,II;,III,IV.
  • the aforementioned disk is driven in The signal emitting disk of FIG. 1 is intended to be operatively related to a four cylinder internal combustion engine. Therefore two ignition sparks must be supplied to the internal combustion engine per revolution thereof.
  • the aforementioned quadrants [and II are provided with marks a and h which may be formed by short radially extending lines arranged close to the periphery of quadrants l and III.
  • Reference numerals l and 2 have been applied to indicate two fixed reference points on signalling disk I,II,III,IV.
  • the spacing between contiguous reference marks or reference lines a,b increases progressively for leading angles, or in counter-clockwise direction.
  • the two reference points 1,2 correspond to ignition angles of and 180 for the two cylinders which must be supplied with ignition sparks at each revolution of the crankshaft.
  • the signalling disk 1,II,III,IV has just reached such a position that its reference point 1 between its quandrants II and III is juxtaposed to a sensor 3.
  • the output signal of sensor 3 is supplied by two parallel lines to the input terminals of an AND-gate 4. One of these two lines interconnects sensor 3 directly with one of the two inputs of gate 4. The other of these two lines interconnects sensor 3 by the intermediary of delay line with the other of the two inputs of gate 4.
  • the output of gate 4 is a signal initiating the storage of energy.
  • Column 2 of the table indicates for given numbers of rpm the angles a which are the angles enclosed between the reference points 1 and 2 and the various markings on signalling disk I,II,III,IV.
  • Column 3 indicates for given numbers of rpm the angles B which are the angles enclosed between contiguous markings on signalling disk I,II,III,IV.
  • the angles a and ,8 have also been indicated in FIG. 1.
  • the angles a stated in column 2 are the travel of disk I,II,III,IV at the number of rpm indicated in column 1 during a time interval of 2 msec. The same applies in regard to the angles [3 indicated in column 3 in regard to time intervals of 0.22 msec.
  • reference mark 1 and sensor 6 Upon termination of the energy storage or loading period reference mark 1 and sensor 6 cooperate to produce an ignition or firing signal.
  • the next energy storage or loading period is determined by the passage of marks b near sensor 1 in substantially the same fashion as the first energy storage or loading period has been determined.
  • the output of AND-gate 4 is used as a trigger signal for the blocking oscillator which generates the ignition spark following a period of time determined by the time constant thereof.
  • marks of reference points 1 and 2 may generate signals in sensor 6 which, in turn, cause interruption of the holding current or triggering of a thyristor.
  • marks a and b are arranged in the first quadrant I and in the third quadrant III of disk I,II,III,lV at and 0, respectively, which marks determine jointly with sensors 3 and 6 the beginning of the energy storage time and the ignition time.
  • the delay line 5 causes a delayed coincidence between two signals resulting from two consecutive marks.
  • the same principle namely the determination of delayed coincidence of two signals to determine the point of time of initiation of energy storage, or ignition coil loading, may be embodied by other means than those shown in FIG. 1, e.g. by the means shown in FIG. 3.
  • FIG. 3 the same reference characters have been applied in that figure as in FIG. 1 to indicate like parts.
  • the system of FIG. 3 calls for description only of such elements thereof which differ from those of the system shown in FIG. I.
  • the principal difference'betweenthe system of FIG. I and that of FIG. 3 resides in'the" fact that'inthesystem of FIG. 3 the individual marks a and b whichcorrespond to each other: are not angularly displaced exactly 180%
  • the 24 marks b of FlGJ-3 encompass an angular, range which corresponds to'that of 23 marks in the system of FIG. .1.
  • a sensor has been added towhich reference character 10 has been applied.
  • Sensor 10 isarranged at the 270 position of four quadrant disk I,II,III,IV.
  • markings a,b are not angularly displaced 180 but have a smaller angular displacement comparable to the marks of a vernier.
  • sensors 3 and 6 emit signals which are delayed one relative to the other. The delay times of these signals is a function of the number of rpm of disk I,II,III,IV. If two such signals coincide in time, module 11 emits a signal which initiates the storage of magnetic energy in the ignition coil.
  • reference marks 1 and 2 sweep passed sensor 10 an ignition or firing signal is emitted by the latter.
  • the circuitry of FIG. 3 is even more desirable than that of FIG. 1, primarily because it does not require delay means and hence possible variations in regard to delay times.
  • the structure and circuitry of FIG. 3 makes it possible to determine in a simple way with a high degree of precision the point of time at which the energization of the ignition coil should be initiated because in the embodiment of FIG. 3 the number of marks on disk I,II,III,IV may be increased, and the coincidence times of module 11 shortened.
  • the embodiment of the invention shown in FIG. 3 is particularly suitable to be used in conjunction with ignition coils forming part of a blocking oscillator to adjust the angles of ignition as a function of the number of revolutions per minute of the internal combustion engine.
  • the desired adjustment of the firing angle may be achieved merely by positioning the marks on disk I,II,III,IV.
  • the resolution of coincidence module 11 may be varied as, for instance, by means of a discriminator, the exact firing time depending upon the resolution of module 11.
  • the measured quantity was the time relation between two marks.
  • the time relation was ascertained by coincidence of a signal resulting from one mark and of a delayed signal resulting from a previous mark.
  • the time relation was ascertained by means of two signals which were generated by two marks each pertaining to one group of marks.
  • the discriminator required in such an instance is a time discriminator and the threshold value to be adjusted by it is the resolution of coincidence module 11.
  • the voltage which is induced in a winding or coil is proportional to the rate of change of a magnetic flux. If marks on a rotating disk are formed by magnetic teeth or the like, the voltage pulses induced in a magnetic sensor cooperating with the disk are proportional to the number of rpm at which the disk is rotated past: the sensor.
  • the spacing between magnetic teeth of a disk and an electromagnetic sensor may vary, e.g. the length or height of such teeth may decrease the larger the leading angle thereof.
  • Another possibility consists in providing the rotatable disk with marks in the shape of a train of waves having a wave length that increases progressively as the leading angle from a fixed reference point increases. As the disk rotates the train of wave marks is sensed by a fixed sensor and converted into a corresponding electric signal. The latter is supplied to a narrow band-pass filter which passes a signal if, and only if, the product of angular velocity of the disk and the wave length of its marks lies within the band of frequencies passed by the filter.
  • the means by which the marks on the rotating disk are sensed by the sensors has no immediate bearing on the present invention.
  • the marks on the disk may be scanned either electro-optically, or inductively.
  • the output signals of the sensors may be processed either by analog means or by digital means.
  • the threshold discriminators applied in embodying the present invention may be time discriminators, voltage discriminators, or current discriminators, the particular kind of discriminators used being dependent upon the particular circumstances under consideration.
  • an ignition system for internal combustion engines including means for inductively storing and for controlling the point of time of initiation of energy storage including in combination a. a rotatable disk driven to rotate in synchronism with an internal combustion engine;
  • discriminator means receiving the output of said sensor means and emitting signals whose timing is a function of the rpm at which said disk rotates past said sensor means;
  • coincidence means are formed by an AND-gate having two inputs of which one input is supplied directly from a marking sensor and the other input is supplied from said marking sensor by the intermediary of a delay line.
  • an ignition system for internal combustion engines including means for conductively storing ignition energy and for controlling the point of time of initiation of energy storage the combination of a. a rotable disk driven to rotate in synchronism with an internal combustion engine;
  • markings on said disk and fixed sensor means for reading said markings when said markings are moved past said sensor means said markings being formed by lines arranged immediately adjacent to the periphery of said disk and having a progressively increasing angular pitch in the direction of rotation of said disk;
  • discriminator means receiving the output of said sensor means and emitting signals whose timing is a function of the number of rpm at which said disk of said pair of sensors.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (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 Ignition Timing (AREA)
US411522A 1972-11-10 1973-10-31 Ignition system for internal combustion engines Expired - Lifetime US3915131A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722255044 DE2255044C3 (de) 1972-11-10 Anordnung für die Bestimmung der Zeitpunkte für das Speichern und Abgeben von Energie bei Zündanlagen für Brennkraftmaschinen

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US3915131A true US3915131A (en) 1975-10-28

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US411522A Expired - Lifetime US3915131A (en) 1972-11-10 1973-10-31 Ignition system for internal combustion engines

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US (1) US3915131A (jp)
JP (1) JPS49100424A (jp)
CH (1) CH557471A (jp)
FR (1) FR2206797A5 (jp)
GB (1) GB1409358A (jp)
IT (1) IT999034B (jp)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024458A (en) * 1976-06-15 1977-05-17 General Motors Corporation Electrical signal generating system
US4146001A (en) * 1974-08-20 1979-03-27 The Lucas Electrical Company Limited Angular position transducers for use in engine timing controls
US4249493A (en) * 1977-05-24 1981-02-10 Robert Bosch Gmbh Method and system for generating operation-dependent control signals for apparatus, particularly ignition and fuel injections systems for internal combustion engines
WO1982002927A1 (en) * 1981-02-23 1982-09-02 Inc Motorola Engine control system with cylinder identification apparatus
US4485785A (en) * 1981-06-05 1984-12-04 Lucas Industries Internal combustion engine function control system
EP0234227A2 (de) * 1986-02-22 1987-09-02 Robert Bosch Gmbh Vorrichtung zum Regeln einer Brennkraftmaschine
US4744343A (en) * 1985-06-12 1988-05-17 Robert Bosch Gmbh Device for controlling an internal combustion engine
WO1990015245A1 (de) * 1989-06-06 1990-12-13 Robert Bosch Gmbh Vorrichtung zum steuern einer brennkraftmaschine
USRE34183E (en) * 1986-02-05 1993-02-23 Electromotive Inc. Ignition control system for internal combustion engines with simplified crankshaft sensing and improved coil charging
US5233960A (en) * 1991-05-17 1993-08-10 Sanshin Kogyo Kabushiki Kaisha Engine ignition timing adjustment device
US5309757A (en) * 1991-07-04 1994-05-10 Mitsubishi Denki Kabushiki Kaisha Cylinder identifying apparatus for a multi-cylinder internal combustion engine
DE19808744A1 (de) * 1998-03-02 1999-05-12 Bosch Gmbh Robert Vorrichtung zum Steuern einer Brennkraftmaschine
US6012427A (en) * 1997-05-30 2000-01-11 Ford Global Technologies, Inc. Internal combustion engine spark scheduling

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852590A (en) * 1958-09-16 fremon
US3592178A (en) * 1969-10-15 1971-07-13 Peter Schiff Electronic ignition timing circuit
US3705573A (en) * 1969-12-31 1972-12-12 Fiat Spa Electronic timing system for internal combustion engine
US3719177A (en) * 1970-03-18 1973-03-06 Nippon Denso Co Signal generating system for internal combustion engines
US3738339A (en) * 1971-12-06 1973-06-12 Gen Motors Corp Electronic ignition spark advance system
US3756212A (en) * 1970-03-21 1973-09-04 Bosch Gmbh Robert Arrangements for electronically determining and adjusting the ignition time of an internal combustion engine
US3799136A (en) * 1970-06-20 1974-03-26 Philips Corp Method of, and apparatus for ignition timing in internal combustion engines

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852590A (en) * 1958-09-16 fremon
US3592178A (en) * 1969-10-15 1971-07-13 Peter Schiff Electronic ignition timing circuit
US3705573A (en) * 1969-12-31 1972-12-12 Fiat Spa Electronic timing system for internal combustion engine
US3719177A (en) * 1970-03-18 1973-03-06 Nippon Denso Co Signal generating system for internal combustion engines
US3756212A (en) * 1970-03-21 1973-09-04 Bosch Gmbh Robert Arrangements for electronically determining and adjusting the ignition time of an internal combustion engine
US3799136A (en) * 1970-06-20 1974-03-26 Philips Corp Method of, and apparatus for ignition timing in internal combustion engines
US3738339A (en) * 1971-12-06 1973-06-12 Gen Motors Corp Electronic ignition spark advance system

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146001A (en) * 1974-08-20 1979-03-27 The Lucas Electrical Company Limited Angular position transducers for use in engine timing controls
US4024458A (en) * 1976-06-15 1977-05-17 General Motors Corporation Electrical signal generating system
US4249493A (en) * 1977-05-24 1981-02-10 Robert Bosch Gmbh Method and system for generating operation-dependent control signals for apparatus, particularly ignition and fuel injections systems for internal combustion engines
WO1982002927A1 (en) * 1981-02-23 1982-09-02 Inc Motorola Engine control system with cylinder identification apparatus
US4485785A (en) * 1981-06-05 1984-12-04 Lucas Industries Internal combustion engine function control system
US4531090A (en) * 1981-06-05 1985-07-23 Lucas Industries Position transducer for an internal combustion engine function control system
US4744343A (en) * 1985-06-12 1988-05-17 Robert Bosch Gmbh Device for controlling an internal combustion engine
USRE34183E (en) * 1986-02-05 1993-02-23 Electromotive Inc. Ignition control system for internal combustion engines with simplified crankshaft sensing and improved coil charging
EP0234227A2 (de) * 1986-02-22 1987-09-02 Robert Bosch Gmbh Vorrichtung zum Regeln einer Brennkraftmaschine
EP0234227A3 (en) * 1986-02-22 1988-03-23 Robert Bosch Gmbh Control device for an internal-combustion engine
WO1990015245A1 (de) * 1989-06-06 1990-12-13 Robert Bosch Gmbh Vorrichtung zum steuern einer brennkraftmaschine
US5233960A (en) * 1991-05-17 1993-08-10 Sanshin Kogyo Kabushiki Kaisha Engine ignition timing adjustment device
US5309757A (en) * 1991-07-04 1994-05-10 Mitsubishi Denki Kabushiki Kaisha Cylinder identifying apparatus for a multi-cylinder internal combustion engine
US6012427A (en) * 1997-05-30 2000-01-11 Ford Global Technologies, Inc. Internal combustion engine spark scheduling
DE19808744A1 (de) * 1998-03-02 1999-05-12 Bosch Gmbh Robert Vorrichtung zum Steuern einer Brennkraftmaschine

Also Published As

Publication number Publication date
DE2255044B2 (de) 1976-05-06
FR2206797A5 (jp) 1974-06-07
CH557471A (de) 1974-12-31
DE2255044A1 (de) 1974-05-30
GB1409358A (en) 1975-10-08
IT999034B (it) 1976-02-20
JPS49100424A (jp) 1974-09-24

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