EP0051529B1 - Dispositif de commande de bobine d'allumage à régulation de temps de conduction optimal pour moteur à explosion - Google Patents

Dispositif de commande de bobine d'allumage à régulation de temps de conduction optimal pour moteur à explosion Download PDF

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Publication number
EP0051529B1
EP0051529B1 EP81401701A EP81401701A EP0051529B1 EP 0051529 B1 EP0051529 B1 EP 0051529B1 EP 81401701 A EP81401701 A EP 81401701A EP 81401701 A EP81401701 A EP 81401701A EP 0051529 B1 EP0051529 B1 EP 0051529B1
Authority
EP
European Patent Office
Prior art keywords
signal
counter
time
coil
output
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
Application number
EP81401701A
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German (de)
English (en)
French (fr)
Other versions
EP0051529A1 (fr
Inventor
Jean-Luc Mate
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.)
Continental Automotive France SAS
RENIX ELECTRONIQUE SA
Original Assignee
Siemens Automotive SA
RENIX ELECTRONIQUE 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 Siemens Automotive SA, RENIX ELECTRONIQUE SA filed Critical Siemens Automotive SA
Publication of EP0051529A1 publication Critical patent/EP0051529A1/fr
Application granted granted Critical
Publication of EP0051529B1 publication Critical patent/EP0051529B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P3/00—Other installations
    • F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
    • F02P3/04—Layout of circuits
    • F02P3/045—Layout of circuits for control of the dwell or anti dwell time
    • F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques

Definitions

  • the present invention relates to an ignition coil control device with optimal conduction time regulation for an internal combustion engine.
  • the spark which causes the ignition of the compressed explosive mixture inside a cylinder of an internal combustion engine is produced by the breakdown of the electric current flowing in the primary of a coil and thereby causing an overvoltage. in high school connected to candles.
  • the primary electrical circuit of the coil must therefore remain closed for a sufficient time, greater than or at least equal to the time required to fill the current necessary to obtain the nominal energy in said coil.
  • US-A-4,018,202 attempts to solve this problem using an ignition coil control device with optimal conduction time regulation comprising means for strictly measuring the time of each ignition cycle. necessary for obtaining the nominal energy at the terminals of the coil and means for calculating from said measured time and the angular location signal an optimal conduction time to control the conduction of the coil at the next ignition cycle.
  • These means include a position counter which, at each ignition cycle, is incremented by the angular tracking signal and a preloaded speed counter which is decremented at each period by a clock signal by this same angular tracking signal .
  • a comparator causes the coil to go into conduction by means of a rocker which is brought back to zero at the instant of ignition.
  • the conduction time strictly necessary to obtain the nominal energy across the coil is detected by a current limiting amplifier and this time is used to adjust the period of the clock signal during which the speedometer is counted down.
  • Such a device implies that the toothed crown integral in rotation with the crankshaft and used to generate the angular tracking signal has a high number of teeth, otherwise the resolution of the angular tracking signal would be insufficient to measure the speed during each period of the signal. clock and to ensure ignition with the required precision, which is generally of the order of a degree.
  • experience shows that it is practically impossible to produce crowns with hundreds of teeth industrially at an acceptable cost.
  • the device described in US-A-4,018,202 is not applicable to an ignition computer having a transfer function of the aforementioned type. Indeed, if the angular location signal is used to increment and decrement the two counters, the number of angular fractions read during a clock signal period will be insufficient to obtain a correct image of the engine accelerations or decelerations, whereas if the interpolation signal is used, the absence of angular position adjustment during an ignition cycle may lead to major errors under the same conditions.
  • US-A-3,908,616 and WO-A-80.02,862 describe devices for regulating the conduction time of an ignition coil which both use targets linked in rotation to the engine crankshaft and associated with sensors providing two angular location signals at each cycle, for example at each half-turn in the case of a four-cylinder engine.
  • This low number of identified angular positions requires the use of electronic devices which do not allow the instantaneous angular position of the crankshaft to be known with sufficient precision in the event of strong acceleration or deceleration of the engine.
  • the devices of these last two patents do not provide for regulation of the conduction time based on the measurement, at each ignition cycle, of the time strictly necessary for obtaining the nominal energy at the terminals of the coil.
  • the optimal conduction time of the coil is recalculated at each TSD period of the angular tracking signal, and it is the last calculated value which will be taken into account by the ignition computer to control the conduction of the coil on the next ignition cycle.
  • This calculated value being equal to and n being the fixed number of interpolation signals appearing at each TSD period, it can be seen that the ratio between t c calculated and t c measured only depends on the choice of the TH 1 / TH 2 ratio.
  • the first counter is preloaded by a loading signal with a number nt, the optimal conduction time calculated by the device being:
  • the signal illustrated in line L 1 in FIG. 1 is the same as that illustrated in line L 11 in FIG. 2.
  • the scales are different.
  • t c conditioned by the value of the battery voltage, the eigenvalue of the self-inductance of the ignition coil and the apparent resistance of the charging circuit, remains constant from one half-turn to the next.
  • the only fundamental quantity at the input of the device according to the invention is therefore the time t c which makes it possible to continuously recalculate the number of angular fractions N to be supplied to the output stage of the computer in order to reconstruct the time t c at best, whatever the instantaneous speed of rotation of the motor.
  • FIG. 3 is an equivalent diagram of the output stage of a digital ignition advance computer usable in association with the control device according to the present invention.
  • the output stage of the computer comprises a counter-accumulator 100 connected by inputs 104 to the outputs of a memory which has not been represented to receive an angular digital value No representative of it advance to beget.
  • the counter-accumulator 100 also has a loading-106 input connected to a sequencer not shown and an input of L 1 count 105 by which it receives the signal TSD illustrated in the line. L 1 of the Figure 1.
  • Half of the most significant outputs 108 of the counter-accumulator 100 are connected as inputs on the adder 101 already encountered and all of the outputs 108 of the counter-accumulator 100 are connected, moreover, as inputs on a door.
  • the flip-flop 103 directly supplies on its output conductor 110 the command signal of the coil as illustrated in line L 16 of FIG. 2.
  • the result of the addition made at 101 between the number N and the content of the angular counter 100 causes the instant of conduction N ⁇ TSD before the instant of ignition.
  • the number N is therefore found to be directly equal to the number of angular fractions or periods of the angular locating signal illustrated in line L 11 of FIG. 2 which separates the instant of conduction from the instant of ignition.
  • two conductors 37 and 38 leave in the direction of a logic block 36.
  • the conductor 37 transmits the signals successive ignition as shown in Figure 2, line L 16 and in Figure 5, line L 2 '.
  • the conductor 38 transmits the regulation signals as shown in FIG. 2, line L 15 and in FIG. 5, line L 3 '.
  • Line L 1 ' Figure 5 represents two successive TDCs.
  • the logic block 36 is connected by a first output 39 to an input of a logic gate 32 with AND function in order to transmit to it a signal illustrated on line L4 ′, FIG.
  • the second input 34 of logic gate 32 is attacked by a clock H 2 of period TH 2 corresponding to the illustration of line L5', Figure 5.
  • the pulses present on output 33 of gate logic 32 with AND function and which are represented on line L 7 'of FIG. 5 penetrate inside a counter 1 by its clock input connected to the conductor 33.
  • the logic block 36 is connected by a second output 41 to the reset input of counter 1 which receives a pulse as shown in line L 6 ′ in FIG. 5 before the reception of the pulses from logic gate 32 with AND function.
  • the counter 1 presents on its outputs 5 a number NA defined as follows:
  • a comparator 6 is attacked, on the one hand, by the outputs 5 of the first counter 1, on the other hand, by the outputs 12 of a second counter 9 whose clock input 10 is connected to the output of a door logic 13 with AND function.
  • This logic gate 13 is attacked on its input 15 by a signal for the start of synchronous counting of the angular location signal as shown in line L 1 "of FIG. 6 and on its second input 4 by a clock H 1 of period TH 1.
  • These are the pulses present on the output 10 of the logic gate 13 which increment the counter 9 by its clock input itself having been reset to zero by its input 11 thanks to a synchronous pulse of the angular tracking signal and preceding the arrival of the first pulse present on input 15.
  • the clock input 19 of a D type flip-flop 17 receives the counting start signal at the same time as the input 15 of the logic gate 13 and thus switches its output Q20 to the high state as shown in the line L 2 "in FIG. 6.
  • the output 7 of comparator 6 is activated and sets the flip-flop to zero 17.
  • the resulting signal illustrated in line L2 "of FIG. 6 of duration t o NB - TH, is applied to the input 20 of a logic gate 21 with AND function.
  • the second input 22 of the logic gate 21 is activated by pulses of period TSD / n illustrated in line L 3 ", FIG. 6.
  • this interpolation signal can be generated in accordance with the teaching of FR-A-2 446 467 filed on January 9, 1979 in the name of the Régie Nationale des Usines Renault for “process and apparatus for locating the angular position of a part with a rotating movement •.
  • the line L 4 "in FIG. 6 illustrates the number of pulses of period TDS / n passed through the measurement window illustrated in line L 2 "in figure 6.
  • the technician can give the ratio n - (TH 1 / TH 2 ) any value he deems useful and in particular the value one which leads to the permanent obtaining of the equation:
  • the control device which is the subject of the present invention makes it possible, during the initialization phase of starting the vehicle, to program, for the first ignition which is generated, a constant conduction time equal to the maximum conduction time encountered in extreme conditions. Operating.
  • the initialization signal emitted by the computer 2 of FIG. 4 arrives, by a conductor 43, at a first input of a logic gate 42 with OR function which activates by its output 45 the loading input of the counter 1.

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 Ignition Timing (AREA)
EP81401701A 1980-11-04 1981-10-27 Dispositif de commande de bobine d'allumage à régulation de temps de conduction optimal pour moteur à explosion Expired EP0051529B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8023509A FR2493412A1 (fr) 1980-11-04 1980-11-04 Dispositif de commande de bobine d'allumage a regulation de temps de conduction optimal pour moteur a explosion
FR8023509 1980-11-04

Publications (2)

Publication Number Publication Date
EP0051529A1 EP0051529A1 (fr) 1982-05-12
EP0051529B1 true EP0051529B1 (fr) 1985-08-28

Family

ID=9247649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401701A Expired EP0051529B1 (fr) 1980-11-04 1981-10-27 Dispositif de commande de bobine d'allumage à régulation de temps de conduction optimal pour moteur à explosion

Country Status (8)

Country Link
US (1) US4469081A (pt)
EP (1) EP0051529B1 (pt)
JP (1) JPS57131863A (pt)
DE (1) DE3172057D1 (pt)
ES (1) ES8300181A1 (pt)
FR (1) FR2493412A1 (pt)
MX (1) MX153785A (pt)
PT (1) PT73923B (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61279772A (ja) * 1985-06-04 1986-12-10 Nippon Denso Co Ltd 内燃機関の点火制御装置
FR2589654B1 (fr) * 1985-10-30 1993-09-10 Bendix Electronics Sa Procede et dispositif de transmission simultanee de deux informations sur une meme ligne electrique suivant des sens opposes
US4933861A (en) * 1988-10-03 1990-06-12 Ford Motor Company Ignition system with feedback controlled dwell
US5628292A (en) * 1996-04-01 1997-05-13 Ford Motor Company Method and system for generating an engine position dependent output control signal

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908616A (en) * 1972-12-18 1975-09-30 Hitachi Ltd Ignition device for use in internal combustion engine
US4018202A (en) * 1975-11-20 1977-04-19 Motorola, Inc. High energy adaptive ignition via digital control
WO1980002862A1 (en) * 1979-06-15 1980-12-24 Motorola Inc Dwell circuitry for an ingnition control system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1548039A (en) * 1975-10-09 1979-07-04 Renault Electronic control of the ignition system of an internal combustion engine
FR2358564A1 (fr) * 1976-07-15 1978-02-10 Renault Dispositif de commande de bobine d'allumage pour moteur a explosion a temps de conduction constant
DE2803556A1 (de) * 1978-01-27 1979-08-02 Bosch Gmbh Robert Vorrichtung zur steuerung des tastverhaeltnisses einer in ihrer frequenz veraenderbaren signalfolge
JPS5578169A (en) * 1978-12-07 1980-06-12 Nippon Soken Inc Electronic control type ignition device for internal combustion engine
JPS5584858A (en) * 1978-12-18 1980-06-26 Nippon Denso Co Ltd Engine control
FR2446467A1 (fr) * 1979-01-09 1980-08-08 Renault Procede et appareillage de reperage de la position angulaire d'une piece animee d'un mouvement de rotation
JPS55109760A (en) * 1979-02-19 1980-08-23 Hitachi Ltd Electronic ignition control
FR2451471A1 (fr) * 1979-03-16 1980-10-10 Thomson Csf Systeme d'allumage du type inductif pour moteur a combustion interne
JPS55142965A (en) * 1979-04-25 1980-11-07 Hitachi Ltd Control method of engine ignition timing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3908616A (en) * 1972-12-18 1975-09-30 Hitachi Ltd Ignition device for use in internal combustion engine
US4018202A (en) * 1975-11-20 1977-04-19 Motorola, Inc. High energy adaptive ignition via digital control
WO1980002862A1 (en) * 1979-06-15 1980-12-24 Motorola Inc Dwell circuitry for an ingnition control system

Also Published As

Publication number Publication date
EP0051529A1 (fr) 1982-05-12
US4469081A (en) 1984-09-04
JPS57131863A (en) 1982-08-14
FR2493412A1 (fr) 1982-05-07
MX153785A (es) 1987-01-09
FR2493412B1 (pt) 1984-09-14
DE3172057D1 (en) 1985-10-03
PT73923A (fr) 1981-12-01
ES506800A0 (es) 1982-10-01
JPH0353467B2 (pt) 1991-08-15
PT73923B (fr) 1983-02-18
ES8300181A1 (es) 1982-10-01

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