WO1987000810A1 - Dispositif de commande de l'intervalle de balayage des essui-glaces - Google Patents

Dispositif de commande de l'intervalle de balayage des essui-glaces Download PDF

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Publication number
WO1987000810A1
WO1987000810A1 PCT/DE1986/000111 DE8600111W WO8700810A1 WO 1987000810 A1 WO1987000810 A1 WO 1987000810A1 DE 8600111 W DE8600111 W DE 8600111W WO 8700810 A1 WO8700810 A1 WO 8700810A1
Authority
WO
WIPO (PCT)
Prior art keywords
wiping
control device
switch
frequency
interval
Prior art date
Application number
PCT/DE1986/000111
Other languages
German (de)
English (en)
Inventor
Erich Zabler
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 WO1987000810A1 publication Critical patent/WO1987000810A1/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
    • B60S1/0896—Wipers or the like, e.g. scrapers characterised by the drive electrically driven including control systems responsive to a vehicle driving condition, e.g. speed

Definitions

  • the invention relates to a wiping interval control device for a windshield wiper motor equipped with a limit switch in vehicles according to the preamble of claim 1.
  • wiping interval control devices there is a need to adjust the frequency of the successive wiping intervals, also called wiping frequency, to the amount of rain falling on the front or windshield of the vehicle, so that the driver is free from the need to adjust the wiping frequency repeatedly, particularly in the event of frequent changes in driving speed constantly changing amount of rain is removed and can concentrate more on the traffic.
  • wiping frequency the frequency of the successive wiping intervals
  • Such an adjustment is useful because on the one hand, a good view should always be guaranteed through the windshield and, on the other hand, dry wiping of the wiper blades must be avoided.
  • the pulse repetition frequency of the control pulses for the switch-on of the windshield wiper motor is automatically set depending on the amount of rain.
  • a capacitive rain sensor is arranged on the front or windshield, which is usually attached to the lower end of the windshield for reasons of good visibility through the windshield. With increasing moisture on the windscreen, the capacity of the rain sensor changes and thus increases the control pulse repetition frequency for the interval wiping.
  • Such rain sensors are not only relatively expensive components, but because of their arrangement on the windshield they also have the disadvantage of not always guaranteeing a wiping frequency that is optimally adapted to the visibility conditions, since at higher driving speeds the rain is derived from the rain sensor due to the aerodynamics occurring on the windshield and thus wiped with a wiping frequency that is too low for a sufficient view through the front window.
  • the wiping interval control device with the characterizing features of claim 1 has the advantage that the wiping interval frequency is always optimally adapted to the amount of rain hitting the windshield. Wiping the wipe dry Leaves at low driving speed of the motor vehicle is avoided as well as interval wiping with too little wiping frequency at high driving speeds. Additional sensors, such as the known rain sensor to be attached separately to the vehicle, are not required; rather, components already present in vehicles are used in the control device. The low manufacturing costs of the device make it so interesting in terms of price that the standard installation in mid-range cars can also be considered. By using existing components that are already required for other functions, the assembly effort during retrofitting can be kept extremely low.
  • the control variable dependent on the speed for influencing the pulse repetition frequency can be obtained in a simple manner from the tachometer of the vehicle.
  • Monotonous dependency of the pulse repetition frequency on the driving speed is understood to mean a dependency in such a way that the pulse repetition frequency increases with increasing driving speed and the pulse repetition frequency decreases with decreasing driving speed. Since a large number of motor vehicles are already equipped with tachometers that emit measuring pulses at a pulse repetition rate that is proportional to the speed, the control device can be implemented practically with only one wiper motor switch and a few electrical connecting lines.
  • the control device can be given a constant, preselectable wiping frequency which, for example when the vehicle is at a standstill, in the case of a stop at a traffic light etc., enables a sufficient view through the windshield.
  • This basic wiping frequency can be set by hand and is superimposed by the speed-dependent wiping frequency when driving. Any uneven time intervals that may occur between the individual wiping phases do not interfere.
  • the frequency divider according to the invention allows the wiping frequency to be adapted to the current rain density.
  • the wiping frequency is still proportional to the driving speed, but the proportionality factor can be changed in steps by setting the frequency divider.
  • FIG. 1 is a block diagram of a wipe interval control device in connection with a wiper motor with limit switch
  • FIG. 2 is a circuit diagram of a wiper motor switch of the control device in FIG. 1.
  • the wiping interval control device 10 shown in the block diagram in FIG. 1 is accommodated in a housing 11, on which an input 12 and two outputs 13, 14 are accessible from the outside.
  • the entrance 12 is at the
  • the two outputs 13, 14 of the control device 10 are connected to the input or to the output of a limit switch 17.
  • the limit switch 17 is located in the circuit of a windshield wiper motor 18 of a motor vehicle, which is usually designed as a DC commutator motor and is connected in series with the limit switch 17 to the motor vehicle battery 19.
  • the limit switch 17 is controlled by the wiper motor 18 or by a wiper linkage driven by the wiper motor 18 in such a way that it opens in one end position of the wiper and in any other position the wiper is closed.
  • the wiping interval control device 10 has a wiping interval transmitter 20 which is coupled to a manually operated wiping interval setting button 21.
  • the wiping interval generator 20 generates control pulses whose pulse repetition frequency can be set by means of the wiping interval setting knob 21.
  • the wiper interval generator 20 is known per se and can e.g. be designed as an astable multivibrator or as a univibrator with adjustable switching time or simply as a threshold switch with variable resistance in the emitter branch of the unijunction transistor.
  • the output of the wiper interval generator 20 is connected to one input of an OR gate 22, the other input of which is at the input 12 of the control device 10.
  • the output of the OR gate 22 is connected to the input of a switch 23, which can briefly bridge the limit switch 17 and thus start the wiper motor 18. Possibly.
  • a frequency divider 24 can be switched on between the output of the OR gate 22 and the input of the switch 23, the divider ratio 1: n of which can be set manually in stages.
  • FIG. 2 A circuit diagram of an embodiment of the switch 23 for the wiper motor 18 is shown in FIG. 2.
  • An electrical switching contact 26 of a switching relay 25 connects the outputs 13, 14 of the control device 10.
  • the relay winding 27 of the switching relay 25, the control pulses at the output of the OR gate 22 are supplied via an amplifier transistor 28, so that the switching contact 26 during the pulse duration of the control. impulse is closed.
  • the operation of the described control device 10 is as follows:
  • the control device 10 With the wiping interval setting button 21, the control device 10 is switched on and at the same time a basic wiping frequency is set.
  • the wiper interval generator 20 emits a control pulse train with a preset pulse repetition frequency at its output. This sequence of control pulses reaches the relay winding 27 of the switching relay 25 via the transistor amplifier 28.
  • the switching contact 26 is closed for the duration of a control pulse and the limit switch 17 is thereby bridged.
  • the wiper motor 18 is switched on, which drives the wiper via the wiper linkage, not shown.
  • the limit switch 17 After the windshield wiper has been moved out of its end position, the limit switch 17 is closed. The windshield wiper moves back and forth. When its end position is reached again, the limit switch 17 is opened and the wiper motor 18 is stopped again. This process is repeated with the next control pulse.
  • the pulse duration of the control pulses is constant and dimensioned at least so large that the windshield wiper runs safely out of its end position and the limit switch 17 is closed.
  • the tachometer 15 outputs at its output a sequence of measuring pulses with a constant pulse duration, the pulse repetition frequency of which is proportional to the driving speed of the motor vehicle. These measuring pulses arrive in the same way as the control pulses of the wiping interval generator 20 via the OR gate 22 to the switch 23 and controls the latter in the same manner described above. The measuring pulses and the control pulses overlap, but the wiping frequency always from Pulse repetition frequency of the measured value pulses is determined.
  • the wiping frequency of the wiper motor 18 is determined by the pulse repetition frequency of the control pulses of the wiping interval generator 20 only when the driving speed drops below a predetermined minimum value.
  • non-uniformly long time intervals may occur between two successive switch-on pulses for the switching relay 25.
  • these non-uniform time intervals do not interfere, since on a statistical average the switching relay 25 is always switched at the frequency dependent on the speed.
  • the pulse repetition frequency of the switch-on pulses arriving at the switching relay 25 can be changed in stages by the frequency divider 24.
  • the wiping frequency of the windshield wiper can be gradually adjusted to the rain density by manual specification.
  • the invention is not restricted to the exemplary embodiment described above.
  • the input 12 of the control device 10 can be connected in the same way to an analog tachometer, at whose output an analog voltage proportional to the driving speed is present.
  • an analog-digital converter must then be connected in between.

Landscapes

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

Abstract

Un dispositif de commande de l'intervalle de balayage (10) destiné à un moteur d'essui-glace (18) muni d'un interrupteur fin de course (17) sur des véhicules comporte un commutateur (23) commandé par impulsion pour lancer ledit moteur (18). Afin d'adapter de manière optimale la fréquence de balayage à la quantité de pluie tombant sur le pare-brise, on donne au train d'impulsions de commande transmises au commutateur (23) une fréquence qui est une fonction monotone de la vitesse du véhicule au moins à l'intérieur d'une plage de vitesse prédéterminée.
PCT/DE1986/000111 1985-07-31 1986-03-14 Dispositif de commande de l'intervalle de balayage des essui-glaces WO1987000810A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3527406.9 1985-07-31
DE19853527406 DE3527406A1 (de) 1985-07-31 1985-07-31 Wischintervall-steuervorrichtung

Publications (1)

Publication Number Publication Date
WO1987000810A1 true WO1987000810A1 (fr) 1987-02-12

Family

ID=6277264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000111 WO1987000810A1 (fr) 1985-07-31 1986-03-14 Dispositif de commande de l'intervalle de balayage des essui-glaces

Country Status (3)

Country Link
EP (1) EP0231196A1 (fr)
DE (1) DE3527406A1 (fr)
WO (1) WO1987000810A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306701A (en) * 1995-10-21 1997-05-07 Ford Motor Co Vehicle rear wiper arrangement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916549C1 (fr) * 1989-05-20 1990-05-17 Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De
AT399320B (de) * 1993-02-01 1995-04-25 Gerd Kittag Steuereinrichtung für den elektromotorischen antrieb mindestens eines scheibenwischers eines fahrzeuges
WO2006068561A1 (fr) * 2004-12-22 2006-06-29 Volvo Lastvagnar Ab Essuie-glace intermittent et sa méthode de commande

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854239A1 (de) * 1978-12-15 1980-06-26 Bayerische Motoren Werke Ag Schaltanordnung fuer den intervallbetrieb eines scheibenwischermotors von kraftfahrzeugen
FR2453443A1 (fr) * 1979-04-04 1980-10-31 Hitachi Ltd Procede et appareil de commande d'equipements d'un vehicule automobile
FR2515588A1 (fr) * 1981-10-30 1983-05-06 Raes Marc Temporisateur d'essuie-glace a reglage automatique selon la vitesse
JPS58202137A (ja) * 1982-05-21 1983-11-25 Nissan Motor Co Ltd 間欠ワイパの駆動制御装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3244767A1 (de) * 1982-12-03 1984-06-07 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Scheibenreinigungsanlage fuer kratfahrzeuge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854239A1 (de) * 1978-12-15 1980-06-26 Bayerische Motoren Werke Ag Schaltanordnung fuer den intervallbetrieb eines scheibenwischermotors von kraftfahrzeugen
FR2453443A1 (fr) * 1979-04-04 1980-10-31 Hitachi Ltd Procede et appareil de commande d'equipements d'un vehicule automobile
FR2515588A1 (fr) * 1981-10-30 1983-05-06 Raes Marc Temporisateur d'essuie-glace a reglage automatique selon la vitesse
JPS58202137A (ja) * 1982-05-21 1983-11-25 Nissan Motor Co Ltd 間欠ワイパの駆動制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, Vol. 8, No. 47, (M-280) (1484), 2 March 1984 & JP, A, 58202137 (Nissan) 25 November 1983, see the whole document *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306701A (en) * 1995-10-21 1997-05-07 Ford Motor Co Vehicle rear wiper arrangement

Also Published As

Publication number Publication date
EP0231196A1 (fr) 1987-08-12
DE3527406A1 (de) 1987-02-12

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