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WO1995031360A1 - Systeme d'essuie-glace - Google Patents

Systeme d'essuie-glace Download PDF

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Publication number
WO1995031360A1
WO1995031360A1 PCT/DE1995/000613 DE9500613W WO9531360A1 WO 1995031360 A1 WO1995031360 A1 WO 1995031360A1 DE 9500613 W DE9500613 W DE 9500613W WO 9531360 A1 WO9531360 A1 WO 9531360A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
wiper device
electric motor
windshield wiper
end position
Prior art date
Application number
PCT/DE1995/000613
Other languages
German (de)
English (en)
Inventor
Stefan Koch
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
Publication of WO1995031360A1 publication Critical patent/WO1995031360A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/06—Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08—Wipers or the like, e.g. scrapers characterised by the drive electrically driven

Definitions

  • the invention relates to a windshield wiper device according to the preamble of the main claim.
  • a generic windshield wiper device which contains an electric motor, the direction of rotation of which can be changed in the end positions of a wiper arm.
  • a pendulum gear which provides a reciprocating movement from a rotary movement, can be omitted. Information on the polarity reversal of the electric motor after reaching the end positions is not included.
  • the invention is based on the object of specifying a windshield wiper device which adheres to specified wiper angle tolerances as precisely as possible.
  • the windshield wiper device has the advantage that the predetermined wiper angle tolerances in the area of the end positions of the wiper arm are largely complied with regardless of the kinetic energy of the wiper.
  • a timer is provided which, after reaching an end position, specifies a delay time for reversing the direction of rotation of the electric motor.
  • the Delay time depends on a signal that is at least approximately a measure of the kinetic energy of the wiper arm.
  • the delay is implemented as a switch-off delay. After reaching an end position, the electric motor is therefore still operated in the same direction of rotation for the predetermined time. If necessary, a reduction in the power made available for the electric motor can be provided during the period of the switch-off delay.
  • a switch-on delay can equally be provided. After reaching an end position, there are different ways to stop the electric motor and the windshield wiper connected to the electric motor. In addition to switching off, a short-circuiting or a polarity reversal of the electric motor can be provided. Any intermediate stages from switching off to short-circuiting or from switching off to polarity reversal can preferably be implemented, for example in the context of clocked operation. The duration of one of these measures is called the switch-on delay.
  • the signal which is at least approximately a measure of the kinetic energy of the wiper arm, can be derived in a simple manner from an operating mode signal.
  • the operating mode signal specifies, for example, a low or a higher operating speed of the wiper.
  • the signal is derived from a speed signal which is tapped at a suitable point in the drive.
  • a speed signal is an exact measure of the kinetic energy of the wiper arm. The delay time can therefore be specified with high accuracy.
  • the speed signal can be obtained, for example, with a speed sensor on the electric motor or on a downstream transmission.
  • a suitable speed sensor is, for example, a magnetic field-sensitive element that detects changes in the magnetic field during the rotation of the electric motor.
  • Another advantageous embodiment provides that the speed signal is derived from the ripple of the current flowing through the motor.
  • the signal which is at least approximately a measure of the kinetic energy of the wiper arm, can be determined without additional effort from the duration of half a wiping cycle from end position to end position, since the signals which signal the reaching of the end position are present anyway.
  • the figure shows a block diagram of a windshield wiper device according to the invention.
  • the figure shows a wiper arm 10 of a windshield wiper, which carries out a reciprocating movement on a windshield, not shown.
  • the windshield wiper 10 is driven by an electric motor 11.
  • An end position sensor 12 determines when the wiper arm 10 reaches one or the other end position and thereupon emits an end position signal 13 both to a wipe cycle time determination 14 and to a timer 15.
  • the timer 15 receives as additional signals a speed signal 17 provided by a speed sensor arrangement 16, a wiping cycle time signal 18 provided by the wiping cycle time determination 14 and an operating mode signal 19.
  • the timer 15 outputs a control signal 20 to an output stage 21 to which the electric motor 11 is connected.
  • the output stage 21 is connected to a first connection 22 and a second connection 23 of an energy source (not shown in more detail).
  • the windshield wiper device according to the invention works as follows:
  • the wiper arm 10 makes a to-and-fro movement on a pane (not shown in more detail) whose surface is to be cleaned.
  • the reciprocating movement is achieved by reversing the polarity of the electric motor 11, which is used, for example, as a permanent magnet DC motor or is implemented as an electronically commutated AC motor.
  • the moving parts of the electric motor 11, a possibly existing gear, the connecting parts between the electric motor 11 and the wiper arm 10 and the wiper arm 10 itself have a certain kinetic energy during the wiping operation. In particular, this kinetic energy is present when one of the end positions of the reciprocating movement is reached.
  • the end position sensor 12 detects that one of the two end positions has been reached.
  • the end positions described here, which the end position sensor 12 detects, do not completely correspond to the reversal positions of the wiper arm 10, because after the end positions have been detected, a time is still required for the reversal process.
  • the end position sensor 12 is, for example, a separate sensor or preferably a control disk, not shown in more detail, which is coupled to the electric motor 11 or the drive and contains slip rings which, in addition to the end position contacts, carry the supply voltage, for example, and, for example, specify an extended parking position.
  • a position sensor can be provided instead of the end position sensor 12, which provides a signal as a measure of the current position of the wiper arm 10.
  • a limited wiping operation can be implemented, which provides a limited wiping area.
  • the signal emitted by the position sensor which can be defined, for example, as a level-dependent end position signal (snow load protection).
  • the wiper arm 10 Due to the kinetic energy, the wiper arm 10 cannot be stopped abruptly when one of the end positions is reached and started in the opposite direction. Depending on the kinetic energy at the time of reaching one the end positions always overshoot in practice. Such overshoot cannot be prevented either by reversing the polarity or by short-circuiting when the end position is reached. At a higher wiping speed, which corresponds to a higher kinetic energy, the overshoot will be greater than at low wiping speeds. The overshoot corresponds to a position or angle error of the wiper arm 10, the amount of which can be predetermined within a tolerance band.
  • the windshield wiper device provides for the use of the timer 15, which, after reaching an end position, specifies a delay time for reversing the direction of rotation of the electric motor 11, the delay time being dependent on a signal which is at least approximately one Measure for the kinetic energy of the movable part of the electric motor 11, possibly an existing transmission, of connecting means and the wiper arm 10.
  • the total kinetic energy is referred to as kinetic energy of the wiper arm 10.
  • the speed signal 17 is provided by the speed sensor arrangement 16, which contains, for example, a magnetic field-sensitive element.
  • the magnetic field sensitive element can interact with a moving magnet or a magnetic field. Such a magnetic field-sensitive element preferably detects the magnetic field changes which can be detected outside of the electric motor 11.
  • Speed sensor arrangements 16 are any other sensors, such as optoelectronic or inductive sensors suitable. According to a preferred embodiment, the speed sensor arrangement 16 detects the ripple of the current flowing through the electric motor 11. The ripple can be used as a measure of the speed.
  • the speed signal 17 is directly related to the kinetic energy of the wiper arm 10. The speed can be taken into account shortly before the end position is reached. In principle, an integral detection of the rotational speed over a certain wiping range is suitable, which is obtained, for example, by low-pass filtering of the rotational speed signal 17.
  • the speed signal 17 causes the timer 15 to set a predetermined delay time. The delay time as a function of the speed signal 17 can be stored, for example, in a table or as a functional relationship in the timer 15.
  • the delay time begins when the end position sensor 12 has emitted an end position signal 13 to the timer 15.
  • the timer 15 can use the delay time, for example, to specify a switch-off delay.
  • the control signal 20 output by the timer 15 to the output stage 21, which triggers at least a reversal of the polarity of the supply voltage of the electric motor, is output to the output stage 21 only after the delay time has expired.
  • the control signal 20 specifies both the direction of rotation and the other operating modes for the electric motor 11.
  • the other operating modes are, for example, a shutdown or a short-circuit or the specification of a continuous transition between shutdown, short-circuiting and polarity reversal.
  • the continuous transition is achieved by means of a clocked operation in which the electric motor 11 is connected to the connections 22, 23 of the energy source in switching operation with a predetermined switch-on / switch-off ratio.
  • a reduction in the power of the electric motor 11 is provided until the switch-off or pole reversal is completed.
  • the longer the delay time the lower the kinetic energy of the wiper arm 10 is in order to be able to achieve the greatest possible overshoot at the maximum kinetic energy of the wiper arm 10 by running on with a small kinetic energy.
  • the operating mode signal 19 is another suitable signal that is at least approximately a measure of the kinetic energy of the wiper arm 10.
  • the operating mode signal 19 is provided, for example, by an operating switch which offers the possibility of switching between a first and a second power level.
  • Another suitable signal that is preferably used is the wiping cycle time signal 18, which is determined in a simple manner with the wiping cycle time determination 14 from the end position signal 13.
  • the end position signal 13 is available anyway for the start of the delay time in the timer 15.
  • a switch-on delay can be provided.
  • a switch-on delay means that after the end position signal 13 occurs, the motor 11 is either switched off or short-circuited. Intermediate stages are also possible in the clocked operation already described. The time between the occurrence of the end position signal 13 and the reversal of the polarity of the power supply of the electric motor 11 for starting in the other direction of rotation corresponds to the switch-on delay.
  • the windshield wiper device according to the invention is particularly suitable for use in motor vehicles.
  • the electric motor 11 shown in the figure can drive one as well as several wiper arms 10 at the same time.
  • a plurality of electric motors 11 can be provided in a motor vehicle, each of which separately drives wiper arms 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

L'invention concerne un système d'essuie-glace qui comprend au moins un bras (10) d'essuie-glace entraîné par un moteur électrique (11) dont le sens de rotation est modifié à chacune des positions extrêmes. Il est prévu une minuterie (15) qui prédéfinit un temps de retard pour l'inversion du sens de rotation du moteur électrique (11), après qu'une position extrême ait été atteinte. Le temps de retard dépend d'un signal (17, 18, 19) qui correspond au moins approximativement à une mesure de l'énergie de déplacement de l'essuie-glace (10). Le système d'essuie-glace réalisé selon l'invention permet de maintenir des tolérances prédéfinies de position ou d'angle de balayage du bras (10) d'essuie-glace, dans les positions extrêmes. Ce système d'essuie-glace s'utilise notamment dans une automobile.
PCT/DE1995/000613 1994-05-18 1995-05-10 Systeme d'essuie-glace WO1995031360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944417371 DE4417371A1 (de) 1994-05-18 1994-05-18 Scheibenwischvorrichtung
DEP4417371.7 1994-05-18

Publications (1)

Publication Number Publication Date
WO1995031360A1 true WO1995031360A1 (fr) 1995-11-23

Family

ID=6518359

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000613 WO1995031360A1 (fr) 1994-05-18 1995-05-10 Systeme d'essuie-glace

Country Status (2)

Country Link
DE (1) DE4417371A1 (fr)
WO (1) WO1995031360A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8581530B2 (en) 2008-02-14 2013-11-12 Robert Bosch Gmbh Electronic self-locking device for a windscreen wiping device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19619145A1 (de) * 1996-05-11 1997-11-13 Teves Gmbh Alfred Scheibenwischeranlage
DE19710099C2 (de) * 1997-03-12 1999-07-22 Bosch Gmbh Robert Vorrichtung und Verfahren zur Steuerung von Scheibenwischern
DE19818173A1 (de) 1998-04-23 1999-11-04 Bosch Gmbh Robert Scheibenwischvorrichtung
DE10009797B4 (de) * 2000-03-01 2008-05-15 Valeo Auto-Electric Wischer Und Motoren Gmbh Scheibenwischervorrichtung zum Wischen von Scheiben
FR2867737B1 (fr) * 2004-03-16 2006-06-09 Peugeot Citroen Automobiles Sa Procede d'estimation de la position d'un balai d'essuie-glace, procede et unite de commande utilisant ce procede, et support d'enregistrement pour ces procedes
FR2867736B1 (fr) * 2004-03-16 2007-05-18 Peugeot Citroen Automobiles Sa Procede de detection, de commande et de releve de defaillance d'un balai d'essuie-glace, support d'enregistrement et unite de commande pour leurs mises en oeuvre
DE102005050774A1 (de) * 2005-10-24 2007-04-26 Robert Bosch Gmbh Scheibenwischanlage mit einer im Ruhezustand eines Wischerantriebs wirksamen Selbsthemmung
DE102008000964B4 (de) * 2008-04-03 2019-07-04 Robert Bosch Gmbh Scheibenwischer Reversierelektronik mit bi-stabilem Relais
ATE499249T1 (de) * 2008-07-25 2011-03-15 Delphi Tech Inc Steuerung für scheibenwischermotor
DE102011054953A1 (de) * 2011-10-31 2013-05-02 Valeo Systèmes d'Essuyage Verfahren zur Ansteuerung eines Scheibenwischermotors

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457794A1 (fr) * 1979-05-31 1980-12-26 Rau Swf Autozubehoer Installation d'essuie-glace pour vehicule automobile
DE3129192A1 (de) * 1981-07-24 1983-02-03 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Schaltanordnung fuer einen aus einer spannungsquelle gespeisten elektromotor einer scheibenwischanlage
US4422024A (en) * 1981-09-03 1983-12-20 Toyota Jidosha Kogyo Kabushiki Kaisha Wiper control device for vehicle
GB2146799A (en) * 1983-09-14 1985-04-24 Swf Auto Electric Gmbh Circuit arrangement for a reversible electric motor
JPH03104754A (ja) * 1989-09-15 1991-05-01 Nippondenso Co Ltd 可逆回転型ワイパ装置
DE4104565A1 (de) * 1990-02-16 1991-08-29 Jidosha Denki Kogyo Kk Wischervorrichtung
JPH04224442A (ja) * 1990-12-25 1992-08-13 Jidosha Denki Kogyo Co Ltd ワイパ制御装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457794A1 (fr) * 1979-05-31 1980-12-26 Rau Swf Autozubehoer Installation d'essuie-glace pour vehicule automobile
DE3129192A1 (de) * 1981-07-24 1983-02-03 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Schaltanordnung fuer einen aus einer spannungsquelle gespeisten elektromotor einer scheibenwischanlage
US4422024A (en) * 1981-09-03 1983-12-20 Toyota Jidosha Kogyo Kabushiki Kaisha Wiper control device for vehicle
GB2146799A (en) * 1983-09-14 1985-04-24 Swf Auto Electric Gmbh Circuit arrangement for a reversible electric motor
JPH03104754A (ja) * 1989-09-15 1991-05-01 Nippondenso Co Ltd 可逆回転型ワイパ装置
DE4104565A1 (de) * 1990-02-16 1991-08-29 Jidosha Denki Kogyo Kk Wischervorrichtung
JPH04224442A (ja) * 1990-12-25 1992-08-13 Jidosha Denki Kogyo Co Ltd ワイパ制御装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 290 (M - 1139) 23 July 1991 (1991-07-23) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 576 (M - 1345) 16 December 1992 (1992-12-16) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8581530B2 (en) 2008-02-14 2013-11-12 Robert Bosch Gmbh Electronic self-locking device for a windscreen wiping device

Also Published As

Publication number Publication date
DE4417371A1 (de) 1995-11-23

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