EP0922855B1 - Verbesserungen an Steuervorrichtungen für Anlasser von Kraftfahrzeugen - Google Patents

Verbesserungen an Steuervorrichtungen für Anlasser von Kraftfahrzeugen Download PDF

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Publication number
EP0922855B1
EP0922855B1 EP19980403119 EP98403119A EP0922855B1 EP 0922855 B1 EP0922855 B1 EP 0922855B1 EP 19980403119 EP19980403119 EP 19980403119 EP 98403119 A EP98403119 A EP 98403119A EP 0922855 B1 EP0922855 B1 EP 0922855B1
Authority
EP
European Patent Office
Prior art keywords
voltage
starter
supply
residual
ripples
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
EP19980403119
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English (en)
French (fr)
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EP0922855A1 (de
Inventor
Gérard Vilou
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.)
Valeo Equipements Electriques Moteur SAS
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Valeo Equipements Electriques Moteur SAS
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Application filed by Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP0922855A1 publication Critical patent/EP0922855A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/10—Safety devices
    • F02N11/101—Safety devices for preventing engine starter actuation or engagement
    • F02N11/105—Safety devices for preventing engine starter actuation or engagement when the engine is already running

Definitions

  • the present invention relates to devices for the control of a motor vehicle starter.
  • Devices for the electronic control of a starter are now classically known. They usually have a management unit that receives as input information on the open or closed state of the start switch - which is usually activated by an ignition key - and control the supply of the winding (s) of a contactor power which, when closed, provides power of the electric starter motor.
  • This contactor of power notably includes a mobile core which, at the end stroke, closes the motor supply circuit electric starter and whose movement causes the engagement of the starter gear towards the crown of start-up.
  • This management unit is also used to manage other functions, such as automatic shutdown starter or protections against overcurrents or against false operations, such as a request to start while the engine is already in operation.
  • This management unit is either integrated into the starter itself, or housed outside the starter in a special box. In another variant, it can be constituted by an electronic system already existing such as the injection computer and ignition.
  • Damage of frontal tooth profiles causes difficulty in penetrating the pinion during subsequent starts.
  • the teeth of the pinion generally harder than those of the crown, act as a milling tool, which in short expires, deteriorates the crown and renders it useless.
  • Replacing the starter or the crown generally requires removal of the engine and is therefore a very expensive operation.
  • the noise emitted by the engine running warns the driver of his operating condition; this is why the risk of false maneuver consisting in operating the starter when the engine is running is enough low.
  • a device of this type is for example described in US 4,415,812.
  • Comparisons to voltage thresholds can be frequently faulted by the variety of situations encountered on a vehicle and the multiplicity parameters that can modify the voltages on which comparisons are implemented (state of battery charge, current consumption, temperature ambient, ...)
  • the invention in turn provides a device for the control of a motor vehicle starter comprising electronic means which manage the starter supply depending in particular on the closed or open state of the start switch, characterized in that said electronic means include means for detecting on a voltage issued of the vehicle network voltage of the ripples residuals corresponding to the undulations present on the voltage at the output of the alternator rectifier bridge when the vehicle's engine is running, as well as means to block the control of starter power when these ripples residuals are detected.
  • Residual ripples present on the voltage at the output of the alternator rectifier bridge are very weak, but have the advantage of being present everywhere on the vehicle's electrical network, and in particular input of electronic starter control cards.
  • the invention also relates to a starter for motor vehicle, characterized in that it comprises a device of the aforementioned type.
  • a motor is shown electric motor starter M as well that the power contactor 1 which controls the power supply of this motor M.
  • This electric motor M is mounted between earth and a + BAT terminal at voltage power supply.
  • the power contactor 1 is constituted by a relay which includes a contact 1a, which is interposed between the supply terminal + BAT and the motor M, as well than a winding B with one or more windings.
  • This coil B is mounted in series with a T1 controlled switch between earth and a "u" terminal which is itself connected to the + Bat terminal by via the start switch 3 of the vehicle (which is usually operated by a key of contact).
  • the switch T1 is for example a transistor of MOSFET type, the grid of which is voltage-controlled by a management unit 2.
  • the voltage sent to the analog input “e 0 " is also injected at the input of a circuit 4 allowing the detection on the supply voltage received by the terminal "u", of residual ripples corresponding to the ripples at the output of the alternator rectifier bridge.
  • This circuit 4 includes in series a module F of filtering, an amplification module A and a module I of value extraction. Its output is connected to a second analog input "e1" of microprocessor 3, which according to the voltage level on said command input or not blocking of transistor T1.
  • the filter module F is a bandpass filter intended to eliminate on the voltage received on the one hand the DC component of this voltage and secondly the high frequency noise that this voltage can present.
  • the lower limit of the filter made by this module F is less than the frequency of the rotating alternator in slow motion.
  • the upper limit is higher than the frequency of the alternator running at its maximum speed.
  • the signal at the output of this module F contains essentially the residual ripple of the alternator.
  • This signal is amplified in module A to be easily exploitable.
  • Module I processes the amplified signal to extract a value which is then injected on the input "e1" of the microprocessor, where it is converted numerically. For example, module I extracts the value mean, or the rms value or the value of peak of the amplified residual signal.
  • one of the first operations of microprocessor 2 is to read the value of the voltage present on "e1" and at the compare to a predetermined threshold.
  • the threshold value is chosen to be higher that residual parasites having an origin other than the alternator, such as switching noises electric motors operating during start-up (pump fuel, motor fans, ). The existence of this threshold avoids confusion of extraneous noise with the signal generated by the alternator.
  • the threshold is chosen lower than the minimum residual ripple level of the alternator.
  • the microprocessor then blocks the transistor T1 which controls contactor 1 and thus prevents all starter operation.
  • circuit 4 A possible embodiment for circuit 4 is illustrated in figure 2.
  • the filtering module F is a passive band pass filter made by two RC circuits.
  • the terminal "u" is connected to a first capacitor C1 there, whose end opposite to said terminal is connected to the ground via a first resistance R1.
  • the capacitor C1 and the resistance R1 are connected to a second resistance R2 which is connected at its other end to a second capacitor C2 mounted between said resistor R2 and the mass.
  • Module A consists of an amplifier with fixed gain. It includes an operational amplifier A1 mounted in non-inverting voltage reaction (input inverters connected to the amplifier output operational A1 by resistance R3 and to earth by resistance R4.
  • the module I illustrated in FIG. 2 makes it possible to collect the peak voltage of the amplified signal. It is consisting of a diode D1 mounted between the output of the amplification module A and the input "e1", being passing from said exit to said entry, as well as by a capacitor C3 mounted between the cathode of said diode D1 and ground.
  • microprocessor 2 can be replaced by analog circuits.
  • electronic means can be placed outside the starter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Eletrric Generators (AREA)

Claims (9)

  1. Vorrichtung zur Steuerung eines Kraftfahrzeuganlassers mit elektronischen Mitteln (2, 4), die die Stromversorgung des Anlassers insbesondere in Abhängigkeit vom geschlossenen oder geöffneten Zustand des Anlaßschalters (3) regeln, dadurch gekennzeichnet, daß die besagten elektronischen Mittel Mittel (4) umfassen, um an einer aus der Netzspannung des Fahrzeugs stammenden Spannung Restwelligkeiten entsprechend den an der Ausgangsspannung der Gleichrichterbrücke des Wechselstromgenerators vorliegenden Welligkeiten zu erfassen, wenn der Verbrennungsmotor des Fahrzeugs läuft, sowie Mittel (2), um die Steuerung der Stromversorgung des Anlassers zu sperren, wenn diese Restwelligkeiten erfaßt werden.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mittel (4) zur Erfassung der Restwelligkeiten Filtermittel (F) in der Ausführung als Bandpaßfilter umfassen, dessen Aufgabe darin besteht, an der empfangenen Spannung einerseits die Gleichstromkomponente dieser Spannung und andererseits die Hochfrequenzstörungen, die diese Spannung aufweisen kann, zu beseitigen.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die niedrige Frequenz der Filtermittel (F) kleiner als die Frequenz des im Leerlauf laufenden Wechselstromgenerators ist und daß seine hohe Frequenz größer als die Frequenz des mit seiner Höchstdrehzahl laufenden Wechselstromgenerators ist.
  4. Vorrichtung nach einem der Ansprüche 2 oder 3, dadurch gekennzeichnet, daß die Mittel (4) zur Erfassung der Restwelligkeiten in Reihe mit den Filtermitteln (F) Verstärkungsmittel (A) und Mittel (I) zum Entnehmen einer Spannung umfassen, deren Wert für das Vorhandensein oder Nichtvorhandensein von Restwelligkeiten repräsentativ ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Entnahmemittel (I) den Mittelwert und/oder den Effektivwert und/oder den Spitzenwert des verstärkten Restsignals entnehmen.
  6. Vorrichtung nach einem der Ansprüche 4 und 5, dadurch gekennzeichnet, daß die elektronischen Mittel Mittel (2) umfassen, um die Ausgangsspannung der Entnahmemittel mit einem Schwellenwert zu vergleichen und um die Steuerung der Stromversorgung des Anlassers zu sperren, wenn die besagte Spannung größer als der besagte Schwellenwert ist.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Mittel, die die Ausgangsspannung der Entnahmemittel mit einem Schwellenwert vergleichen, aus einem Mikroprozessor (2) bestehen, der eingangsseitig die Ausgangsspannung der besagten Entnahmemittel empfängt.
  8. Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die durch die Mittel (4) zur Erfassung der Restwelligkeiten empfangene Spannung die Speisespannung der elektronischen Mittel zur Regelung der Stromversorgung des Anlassers ist.
  9. Kraftfahrzeuganlasser, dadurch gekennzeichnet, daß er eine Vorrichtung nach einem der vorangehenden Ansprüche umfaßt.
EP19980403119 1997-12-10 1998-12-10 Verbesserungen an Steuervorrichtungen für Anlasser von Kraftfahrzeugen Expired - Lifetime EP0922855B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9715617A FR2772085B1 (fr) 1997-12-10 1997-12-10 Perfectionnement aux dispositifs pour la commande d'un demarreur de vehicule automobile
FR9715617 1997-12-10

Publications (2)

Publication Number Publication Date
EP0922855A1 EP0922855A1 (de) 1999-06-16
EP0922855B1 true EP0922855B1 (de) 2003-02-05

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EP19980403119 Expired - Lifetime EP0922855B1 (de) 1997-12-10 1998-12-10 Verbesserungen an Steuervorrichtungen für Anlasser von Kraftfahrzeugen

Country Status (4)

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EP (1) EP0922855B1 (de)
DE (1) DE69811193T2 (de)
ES (1) ES2192757T3 (de)
FR (1) FR2772085B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018144672A1 (en) * 2017-02-01 2018-08-09 Borgwarner Inc. System and method for detecting an operating motor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797536B1 (fr) * 1999-08-09 2001-11-02 Valeo Equip Electr Moteur Dispositif de commande de l'alimentation d'un demarreur de moteur thermique, notamment de vehicule automobile
FR2982911B1 (fr) * 2011-11-18 2013-11-15 Valeo Equip Electr Moteur Demarreur electrique a filtre electronique integre pour moteur a combustion interne

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4415812A (en) * 1982-01-11 1983-11-15 General Motors Corporation Electric starting system
IT1285276B1 (it) * 1996-02-28 1998-06-03 Fiat Ricerche Dispositivo per rilevare l'avvenuto avviamento di un motore a combustione interna
FR2746449B1 (fr) * 1996-03-21 1998-06-12 Valeo Equip Electr Moteur Procede et dispositif pour la commande d'un contacteur d'alimentation d'un demarreur de vehicule automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018144672A1 (en) * 2017-02-01 2018-08-09 Borgwarner Inc. System and method for detecting an operating motor

Also Published As

Publication number Publication date
EP0922855A1 (de) 1999-06-16
ES2192757T3 (es) 2003-10-16
DE69811193D1 (de) 2003-03-13
FR2772085A1 (fr) 1999-06-11
FR2772085B1 (fr) 2000-02-25
DE69811193T2 (de) 2003-09-25

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