WO1991007298A1 - Dispositif pour la commande automatique d'essuie-glace de vehicules a moteur - Google Patents

Dispositif pour la commande automatique d'essuie-glace de vehicules a moteur Download PDF

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Publication number
WO1991007298A1
WO1991007298A1 PCT/DE1990/000832 DE9000832W WO9107298A1 WO 1991007298 A1 WO1991007298 A1 WO 1991007298A1 DE 9000832 W DE9000832 W DE 9000832W WO 9107298 A1 WO9107298 A1 WO 9107298A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
wiper motor
signal
control
switch
Prior art date
Application number
PCT/DE1990/000832
Other languages
German (de)
English (en)
Inventor
Jürgen Mangler
Wilhelm Hoppe
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 WO1991007298A1 publication Critical patent/WO1991007298A1/fr

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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
    • B60S1/0818—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to external conditions, e.g. by detection of moisture, dirt or the like

Definitions

  • the invention relates to a device for the automatic control of motor vehicle wipers according to the preamble of the main claim.
  • a device known from DE-OS 33 14 770 detects a possible wetting of the window to be wiped via an optical sensor.
  • the sensor signals are continuously fed to an electronic control device which generates control signals for the windshield wiper motor if the sensor signals indicate wetting of the windshield.
  • the continuously detected sensor signal is falsified.
  • streaks can form on aged wiper blades and on soiled window surfaces, which in turn contribute to falsifying the measurement result.
  • the sensor signals can be predominantly falsified, so that the evaluation of the sensor signals is very difficult overall.
  • the windshield wiper itself can lead to additional false signals when the sensor is passed over.
  • the method according to the invention with the characterizing features of the main claim has the advantage, that the evaluation of the sensor signals is not impaired by the actual wiping process, since no sensor signals are used for control purposes during the movement of the windshield wiper motor. Rather, the detection of the sensor signals takes place after the wiping process has ended at a precisely defined point in time within the wiping intervals, so that any newly added moisture can be detected in a defined manner. Any impairment by the windshield wiper itself is excluded anyway. The successive sensor signals can therefore precisely detect " changes in the wetting of the windscreen without fear of interferences that are difficult to calculate. Another advantage is that a sensor signal is sufficient to control a definable wiping interval s, so that superfluous switch-on signals for the wiper motor This leads to an increase in the service life of the electronic components involved and the control disk of the control wiper motor.
  • the definable interval comprises at least one complete wiper movement.
  • the sensor is expediently connected to the control input of a timing element, which actuates the windshield wiper motor during its holding time via a power control element.
  • the windshield wiper motor must be provided with a holding device known per se for maintaining its operation during a complete wiper movement.
  • a known holding device is usually one control disc coupled to the wiper motor.
  • the holding time of the timer can be chosen to be so short that this timer just barely triggers the holding device.
  • the sensor signal triggers only one wiper movement, while the wiper movement itself takes place in a known manner.
  • the means for suppressing the sensor signals have, in a circuit-simple manner, a switch connecting the sensor output or another point of the control connection between the sensor and the windshield wiper motor with a switch which makes the sensor signal ineffective.
  • This potential is expediently the ground potential, so that the sensor signal remains short-circuited during the operation of the windshield wiper motor. This enables effective suppression of the sensor signals with very simple formwork means.
  • the control input of the switch can be acted upon in particular by the output signal of the timing element and / or by the control signal of the holding device, the switch closing when such a signal occurs.
  • a particularly favorable solution is that the control input of the switch is acted on by both signals, on the one hand to prevent further sensor signals from being suppressed immediately after the start signal for the wiper motor, this suppression then being maintained by the second signal during operation.
  • a signal level adjustment device which can be carried out in a simple manner is provided, which can be designed in particular as a Z diode which is connected to the control signal the holding device leading line is connected.
  • FIG. 1 An embodiment of the invention is shown in the drawing.
  • the single figure shows the embodiment in the block switch t i Id.
  • the sensor 10 which is only shown schematically, can be, for example, the optical sensor arrangement with a downstream evaluation device according to the prior art specified at the outset.
  • resistive, acoustic, capacitive or other suitable principles can be used for this.
  • the output of the timer 12 is connected to the base of a power transistor 15 via a resistor 13 and a diode 14 connected in series therewith.
  • the emitter of this power transistor 15 is connected to ground and the collector via a relay winding 16 to the positive pole of a supply voltage U1.
  • This positive pole is also connected via a switching path 17, which can be controlled by the relay winding 16, of a relay 18 to a windshield wiper motor 19, the second connection of which is connected to ground.
  • This windshield wiper motor 19 drives a windshield wiper 20, as is symbolically represented by a dashed line. Of course, this can also involve several windshield wipers that are mechanically coupled to one another.
  • the wiper motor 19 drives a control disk 21 in a known manner, by means of which a control switch 22 is closed after the start of the rotary movement, remains closed for a complete Wi-cycle interval s (a reciprocating movement) and is then opened again.
  • a control disk 21 is provided in almost all windscreen wiper motors 19 used today.
  • the closed control switch 22 supplies the windshield wiper motor 19 with the supply voltage U so, so that it also works when the relay 18 is open during the wiping interval mentioned.
  • the control input of the timer 12 is via a diode
  • the short-circuit switch 24 connectable to ground.
  • the short-circuit switch 24 can be designed, for example, as a switching transistor.
  • the output of the timing element 12 is connected via an OR gate 25 to the control input of the short-circuit switch 24, a connection 26 of the wiper motor 19 which can be supplied with the supply voltage via the control disc 21 via a resistor 27 to a second input of the OR Link 25 is connected. This connection is connected to ground via a Z diode 28.
  • the Z-diode 28 and the resistor 27 limit the supply voltage U1 to the Z-voltage of the Z-diode 28, which is selected so that the supply voltage U1 is the required control voltage for the OR gate
  • the sensor 10 detects wetting of the window to be wiped as a result of precipitation, the sensor signal generated in this way triggers the timing element 12.
  • an output-side control signal for the power transistor 15 is generated.
  • the relay 18 is actuated and the windshield wiper motor 19 starts to turn.
  • the short-circuit switch 24 is closed by this output signal from the timer 12, so that the following sensor signals from the sensor 10 are short-circuited and the timer 12 cannot trigger again.
  • the control switch 22 is closed by the control disk 21, so that the wiper motor 19 continues its rotary movement, even if the relay 18 drops out again after the 100 ms.
  • the short-circuit switch 24 is kept closed via the signal at the connection 26.
  • control switch 22 opens again and a new start depends on whether a sensor signal from the sensor 10 is present again or is still present at this point in time. At this time, the short-circuit switch 24 is opened again.
  • the holding time of the timer 12 is selected so that a safe start of the wiper motor 19 is ensured, that is to say that the time until the control switch 22 closes (approximately 20 ms) is safely bridged.
  • This arrangement ensures that sensor signals are always detected only in the end position of the windshield wiper 20, that is to say not during its movement, in order to avoid falsified sensor signals through the wiper blade, through streaks or the like. to prevent or hide.
  • the connecting line between the output of the timing element 12 and the short-circuit switch 24 and the OR element 25 can also be omitted. It is accepted that sensor signals may still be effective at the start of the movement of the wiper motor 19.
  • the holding time of the timer 12 is set so that it lasts longer than a wiping interval, so can accordingly two or more Wi interval s are detected by a sensor signal, that is, at least two complete wiping movements are carried out by a sensor signal until a new sensor signal is requested. If a timer with a variably adjustable hold time is used, the number of wiping intervals can also be set individually.

Landscapes

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

Abstract

Le dispositif décrit comporte un moteur d'essuie-glace (19) et un capteur (10) pour détecter l'humidité présente sur le pare-brise. Un dispositif électronique comporte des moyens (12-18, 21, 22) qui mettent en marche le moteur d'essuie-glace (19) pour un intervalle de temps donné lorsqu'un signal de capteur est émis, et des moyens (24) pour supprimer les signaux de capteur émis lorsque le moteur d'essuie-glace (19) est en mouvement. L'évaluation des signaux de capteur n'est donc pas affectée par le processus d'essuyage lui-même, et toute variation dans le mouillage du pare-brise peut être détectée avec précision au moyen de signaux de capteur consécutifs. En outre, un signal de capteur suffit pour commander un intervalle d'essuyage donné, et par conséquent des signaux redondants pour la mise en marche du moteur d'essuie-glace sont supprimés.
PCT/DE1990/000832 1989-11-15 1990-11-02 Dispositif pour la commande automatique d'essuie-glace de vehicules a moteur WO1991007298A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893937920 DE3937920A1 (de) 1989-11-15 1989-11-15 Vorrichtung zur automatischen steuerung von kraftfahrzeug-scheibenwischer
DEP3937920.5 1989-11-15

Publications (1)

Publication Number Publication Date
WO1991007298A1 true WO1991007298A1 (fr) 1991-05-30

Family

ID=6393539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1990/000832 WO1991007298A1 (fr) 1989-11-15 1990-11-02 Dispositif pour la commande automatique d'essuie-glace de vehicules a moteur

Country Status (2)

Country Link
DE (1) DE3937920A1 (fr)
WO (1) WO1991007298A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547337A1 (fr) * 1991-12-14 1993-06-23 Leopold Kostal GmbH & Co. KG Dispositif de commande d'un système d'essuie-glaces
US5276388A (en) * 1991-12-14 1994-01-04 Leopold Kostal Gmbh & Co. Kg Apparatus and method for controlling a windshield wiping system
US5319293A (en) * 1991-12-14 1994-06-07 Leopold Kostal Gmbh & Co. Apparatus and method for controlling a windshield wiping system
US5336980A (en) * 1992-12-10 1994-08-09 Leopold Kostal Gmbh & Co. Apparatus and method for controlling a windshield wiping system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0394355U (fr) * 1990-01-18 1991-09-26
DE4229491A1 (de) * 1992-09-04 1993-01-07 Steinbacher Peter Dipl Ing Fh Vorrichtung zur steuerung einer scheibenwischeranlage fuer kraftfahrzeuge
DE9301124U1 (fr) * 1993-01-28 1993-03-25 Wolle, Rudi, 5442 Mendig, De
KR19990063055A (ko) * 1997-12-17 1999-07-26 마쯔무라 미노루 물방울 감응식 와이퍼 제어장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649898A (en) * 1968-09-21 1972-03-14 Nippon Denso Co Windshield wiper control apparatus
EP0115338A2 (fr) * 1983-01-28 1984-08-08 Nissan Motor Co., Ltd. Système de commande d'essuie-glace dépendant de la pluie pour un véhicule automobile
US4554493A (en) * 1984-02-29 1985-11-19 Armstrong Howard L Automated windshield wiper system
EP0192416A2 (fr) * 1985-02-15 1986-08-27 Toyota Jidosha Kabushiki Kaisha Capteur pour détecter une quantité de pluie
DE3314770C2 (fr) * 1983-04-23 1987-11-12 Sidler Gmbh & Co, 7400 Tuebingen, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649898A (en) * 1968-09-21 1972-03-14 Nippon Denso Co Windshield wiper control apparatus
EP0115338A2 (fr) * 1983-01-28 1984-08-08 Nissan Motor Co., Ltd. Système de commande d'essuie-glace dépendant de la pluie pour un véhicule automobile
DE3314770C2 (fr) * 1983-04-23 1987-11-12 Sidler Gmbh & Co, 7400 Tuebingen, De
US4554493A (en) * 1984-02-29 1985-11-19 Armstrong Howard L Automated windshield wiper system
EP0192416A2 (fr) * 1985-02-15 1986-08-27 Toyota Jidosha Kabushiki Kaisha Capteur pour détecter une quantité de pluie

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547337A1 (fr) * 1991-12-14 1993-06-23 Leopold Kostal GmbH & Co. KG Dispositif de commande d'un système d'essuie-glaces
US5276388A (en) * 1991-12-14 1994-01-04 Leopold Kostal Gmbh & Co. Kg Apparatus and method for controlling a windshield wiping system
US5319293A (en) * 1991-12-14 1994-06-07 Leopold Kostal Gmbh & Co. Apparatus and method for controlling a windshield wiping system
USRE35422E (en) * 1991-12-14 1997-01-14 Leopold Kostal Gmbh & Co. Kg Apparatus and method for controlling a windshield wiping system
US5336980A (en) * 1992-12-10 1994-08-09 Leopold Kostal Gmbh & Co. Apparatus and method for controlling a windshield wiping system

Also Published As

Publication number Publication date
DE3937920A1 (de) 1991-05-16

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