EP2234850A1 - Dispositif d'essuie-glace - Google Patents

Dispositif d'essuie-glace

Info

Publication number
EP2234850A1
EP2234850A1 EP08864680A EP08864680A EP2234850A1 EP 2234850 A1 EP2234850 A1 EP 2234850A1 EP 08864680 A EP08864680 A EP 08864680A EP 08864680 A EP08864680 A EP 08864680A EP 2234850 A1 EP2234850 A1 EP 2234850A1
Authority
EP
European Patent Office
Prior art keywords
wiper arm
wiper
defined position
wiping
arm
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.)
Withdrawn
Application number
EP08864680A
Other languages
German (de)
English (en)
Inventor
Peter Braun
Florian Tisch
Ulrich Metz
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.)
Robert Bosch GmbH
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 EP2234850A1 publication Critical patent/EP2234850A1/fr
Withdrawn legal-status Critical Current

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 method for controlling a wiper arm of a windshield wiper device according to the preamble of claim 1.
  • the invention also relates to a control device for driving a wiper arm of a windshield wiper device according to the preamble of claim 13.
  • Windscreen wiper devices for cleaning vehicle windows typically include a wiper motor configured to move a wiper with a wiper blade relative to a vehicle window. Starting from a drive shaft of the wiper motor, the pivoting movement is transmitted to the wiper blade via a wiper arm.
  • the wiping angle typically about 90 ° swept during the wiping movement, or the reversal positions of the wiper, determine the wiping field cleaned by the wiper blade.
  • the effective elasticities of the windscreen wiper device and the frictional forces occurring between the wiper and the vehicle window depend on the degree of moisture of the windscreen and the wiper blade, as well as on the selected wiper speed and influence the wiping angle effectively swept over. This must be taken into account by selecting a wiper reversing position with sufficient distance to the disc edge or the first interfering body. Furthermore, during the life of the windshield wiper device due to wear, there is an increase in the number of games that change the wiping angle. This must also be taken into account by selecting a wiping angle with sufficient reserve for the edge of the disc or first obstruction. Also component tolerances of the wiper drive, the wiper arm and the vehicle lead to uncertainties of the swept wiping angle, which must be considered as a reserve to the edge of the disc.
  • a windshield wiper device with a reversible motor which can be adjusted to a desired wiping angle.
  • an actual wiping angle is detected with a sensor and transmitted to an external test computer.
  • the external test computer calculates, based on a predetermined transfer function, which indicates a realized wiping angle as a function of an engine corner angle, a corrected engine crank angle corresponding to the desired wiping angle. This is stored in the control of the windshield wiper device and used during future wiping operations as a reversal position of the wiper arm.
  • the object of the present invention is to provide a method for controlling a wiper arm of a windshield wiper device, which permits a simplified adjustment of the wiper angle. It is another object of the present invention to provide a control device for driving a wiper arm of a windshield wiper device, which allows a simplified adjustment of the wiping angle.
  • An inventive method for controlling a wiper arm of a windshield wiper device comprises pulling the wiper arm with a force acting on the wiper arm to a defined position and detecting the defined position for controlling the wiper arm.
  • the method according to the invention allows an adjustment of the wiping angle. Due to the adjustability of the wiping angle component tolerances of the wiper drive, the wiper arm and the vehicle can be compensated. Another advantage is that even aging-related increases in the effective games of the windshield wiper device can be compensated by possibly repeated adjustment of the wiping angle during the life of the windshield wiper device. As a result, a maximum wiping field with a minimum reserve can be selected to the edge of the pane.
  • the wiper arm is pulled into the desired position during the adjustment with a force acting on the wiper arm.
  • elasticities and play of the windshield wiper device act in the same direction as during dynamic wiping under wind load. This minimizes the influence of the elasticities and play of the windscreen wiper device on the adjustment accuracy of the wiping angle. Therefore, the wiping field can be maximally selected.
  • reversal positions of the wiper arm are determined.
  • the wiper arm is pulled by hand in the desired position.
  • a simple and cost-effective adjustment of the wiping angle is made possible to carry out any additional equipment.
  • an assembly jig which provides a stop at a reversal position. on.
  • the wiper arm can be pulled against the stop of the assembly jig.
  • this allows a simple, fast and less error-prone adjustment of the wiping angle of the windshield wiper device.
  • control unit acts on the stored reversing position with a correction value.
  • the applied correction value takes into account information about the humidity of the wheel to be wiped and the wiper blade and the wiping speed of the windscreen wiper device.
  • the same windshield wiper device can be used in different vehicle types.
  • FIG. 1 schematically shows the sweeping angle swept by a windshield wiper device with two wiper arms
  • FIG. 2 shows a schematic block diagram of a windshield wiper device according to the invention.
  • FIG. 1 schematically shows a pane 100 of a vehicle.
  • two wiper arms 102 are provided, at the end of each wiper blade 105 is attached.
  • Each wiper arm 102 performs a rotary movement about a wiping angle 104.
  • the respective wiper blade 105 sweeps over a wiping field 101, which is delimited by two reversal positions 103.
  • the actual wiping field 101 is subject to tolerance ranges 110, 111, 112.
  • tolerance ranges 110, 111, 112. In the case of a dry disk 100, other elasticities and frictional forces act than in the case of a wet disk 100. The same applies to different wiping speeds.
  • the windscreen wiper device increases in wear. Component tolerances of the wiper drive, the wiper arm 102 and the vehicle result in a third tolerance range 112 of the wiping field 101.
  • wiping angles 104 and Wischfeld 101 are designed conservatively to avoid a collision of the wiper blade 103 with a bluff body at the edge of the disc 100.
  • no tolerance range 112 should be provided for compensating for component tolerances when choosing the reversing positions 103.
  • the aim is not to provide a tolerance range 111 for compensating the increase in play during the life of the windshield wiper device, but rather the reversal position. readjust 103 during the service life of the windscreen wiper device.
  • one or both reverse positions 103 should be dynamically adapted to the respective operating state during operation of the windscreen wiper device.
  • FIG. 2 shows schematically a windshield wiper device according to the invention.
  • a control device 204 has a memory device 205.
  • the controller 204 may generate a control signal 206 for driving a reversible motor 200.
  • a drive shaft 201 of the motor 200 is connected to a wiper arm 102, at the end of a wiper blade 105 is attached.
  • the wiper blade 105 is provided to clean a disc 100 of a motor vehicle by means of a pivoting movement transmitted by the motor 200 via the drive shaft 201 to the wiper arm 102.
  • position information of the wiper arm 102 relative to the disk 100 can be determined.
  • the position determining means 202 may detect, for example, the rotation angle of the drive shaft 201.
  • the position determination device 202 transfers the determined position information 203 to the control unit 204.
  • An encoder 207 may be provided to pass information 208 about an operating state to the control unit 204.
  • the transmitter 207 may include a humidity sensor for detecting the humidity of the disk 100 and the wiper blade 105.
  • the transmitter 207 may also include sensors for determining the ambient temperature.
  • the operating state information 208 may also include information about a desired wiping speed of the wiper arm 102 included.
  • the encoder 207 can be dispensed with.
  • a change-over switch 209 allows the windshield wiper device to be switched between a learning mode and a working mode.
  • the switch 209 transfers the selected operating mode in the form of mode information 210 to the control unit 204. It is also possible to make the windscreen wiper device switchable between a learning mode and a working mode in another manner.
  • the learning mode allows one or more reversal positions
  • the wiper arm 102 is pulled in the learning mode by hand or by means of a device provided for it to a desired reversing position 103.
  • the force moving the wiper arm acts on the wiper arm.
  • the use of an assembly jig that has a mechanical stop at the desired reversing position 103 may prove advantageous.
  • the mop is then pulled to the stop of the assembly gauge.
  • another form of mechanical stop can be used or the wiper arm 102 can be freehand pulled into the desired reversing position 103.
  • the position of the wiper arm 102 in the reversing position 103 is determined by means for determining the position 202.
  • the device for position determination 202 can determine the rotational angle of the drive shaft 201.
  • the determined position information 203 of the wiper arm 102 is transferred to the control unit 204 and stored in the storage device 205.
  • the determination and storage of the position information 203 can be triggered, for example, by actuation of a switch, which is not shown in FIG.
  • the determination and storage of the position information 203 may also be performed by lapse of a predetermined period of time since the switching of the windshield wiper device in the Learning mode are triggered.
  • the determination and storage of the position information 203 can also be triggered by switching the windscreen wiper device into the operating mode.
  • only a first reversing position 103 is determined at the lateral edge of the disc 100 and stored in the memory device 205 in the learning mode.
  • a second reversing position 103 at the lower edge of the disc 100 may already be deposited by the vehicle manufacturer in the storage device 205.
  • both reversal positions 103 can be determined in the learning mode and stored in the memory device 205.
  • the controller 204 In operation mode, the controller 204 generates a control signal 206 for driving the motor 200.
  • the motor 200 causes the wiper arm 102 via the drive shaft 201 in a pivoting movement with a first rotational direction.
  • the position determination device 202 determines each one
  • Time point position information 203 of the wiper arm 102 and passes it to the control unit 204.
  • the controller 204 continuously compares the current position information 203 of the wiper arm 102 with the stored during the learning mode 'in the storage device 205 position information of the first reversing position 103. Once the current position information 203 equal the wiper arm 102 has reached the first reversing position 103, the control unit 204 generates a control signal 206 which instructs the motor 200 to reverse the direction of rotation.
  • the motor 200 then sets the wiper arm 102 in a pivoting movement with a second direction of rotation, which is opposite to the first direction of rotation.
  • the control unit 204 now compares the current position information 203 of the wiper arm 102 with the position information of the second reversal position 103 stored in the memory device 205. Upon reaching the second reversing position 103, the direction of rotation of the motor 200 is reversed again and another wiping cycle begins.
  • the tolerance range 112 shown in Figure 1 can be minimally selected, whereby the wiping field 101 increases accordingly.
  • Windscreen wiper device minimized to the adjustment accuracy of the reversing position 103. Therefore, the tolerance range 110 shown in Figure 1 can be made smaller, whereby the wiping field 101 increases accordingly.
  • the controller 204 may also determine equivalent information in an alternative embodiment and store it in the memory device 205. For example, that can
  • Controller 204 to measure a time required to move the wiper arm 102 from the reversing position 103 to a second reversing position at the opposite end of the wiping field 101.
  • the control unit 204 moves the wiper arm 102, starting from the second reversing position, in the direction of the reversing position 103 for the same time duration.
  • the direction of movement of the wiper arm 102 is reversed and the wiper arm 102 is returned to the second reversing position within the identical period of time. moves. Subsequently, the direction of movement of the wiper arm 102 is reversed again.
  • an operating state information transmitter 207 may be present.
  • the operating state information transmitter 207 transfers an operating state information 208 to the control device 204.
  • different operating states cause different elasticities of the windscreen wiper device.
  • different positions of the wiper blade 105 on the disk 100 may result for different operating states 104 for identical wiping angles 104.
  • control unit 204 can act on a position information 203 of a reversing position 103 stored in the memory device 205 with a correction dependent on the operating state information 208.
  • controller 204 compares the position information 203 of the wiper arm 102 obtained by the position-determining device 202 with the corrected position information 203 of the reversing position 103
  • the controller 204 generates a control signal 206 to reverse the direction of rotation of the motor 200. Due to the operating state-dependent correction, the tolerance range 110 shown in FIG. 1 can be further minimized, as a result of which the wiping field 101 increases correspondingly.
  • two or more wiper arms 102 may also be provided.
  • the wiper arms 102 can be driven synchronously by a common motor 200.
  • only reversing positions 103 for one of the wiper arms 102 are stored in the memory device 205 in the learning mode.
  • the reversal positions of the other wiper arm 102 result from the coupling of the two wiper arms 102.
  • the position determination device 202 merely determines the position of the wiper arm 102, for the reversing positions 103 in the wiper arm 102.
  • storage device 205 are deposited.
  • two wiper arms 102 are driven by two independent motors 200.
  • the position-determining device 202 may determine the position of both wiper arms 102, or two position-determining devices 202 may be provided.
  • reversing positions 103 for both wiper arms 102 can be stored independently.
  • the reversing positions 103 can be specified in the learning mode, for example using an assembly gauge.
  • the control unit 204 compares the position information of both wiper arms 102 in the working mode with the respective stored reversal positions 103 and optionally instructs the wiper motors 200 independently of each other to reverse the direction of rotation.
  • the windshield wiper device according to the invention makes it possible to readjust the reversal positions 103 of a wiper arm 102, if necessary during the life of the windshield wiper device, in order to compensate for an increase in the number of plays of the windshield wiper device due to wear. Therefore, the tolerance range 111 shown in Figure 1 can be minimally selected, whereby the wiping field 101 increases accordingly.
  • the windshield wiper device according to the invention can be adapted to different vehicle and disk geometries with different reversal positions 103, under some circumstances it may be possible to use the same wiper system in different vehicle types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

La présente invention concerne un procédé de commande d'un bras d'essuie-glace (102) d'un dispositif d'essuie-glace, le procédé comportant les étapes suivantes : traction du bras d'essuie-glace (102) vers une position définie au moyen d'une force s'exerçant sur le bras d'essuie-glace (102) et détection de la position définie pour commander le bras d'essuie-glace (102).
EP08864680A 2007-12-20 2008-10-27 Dispositif d'essuie-glace Withdrawn EP2234850A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710061744 DE102007061744A1 (de) 2007-12-20 2007-12-20 Scheibenwischvorrichtung
PCT/EP2008/064499 WO2009080394A1 (fr) 2007-12-20 2008-10-27 Dispositif d'essuie-glace

Publications (1)

Publication Number Publication Date
EP2234850A1 true EP2234850A1 (fr) 2010-10-06

Family

ID=40251795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08864680A Withdrawn EP2234850A1 (fr) 2007-12-20 2008-10-27 Dispositif d'essuie-glace

Country Status (3)

Country Link
EP (1) EP2234850A1 (fr)
DE (1) DE102007061744A1 (fr)
WO (1) WO2009080394A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220277A1 (de) * 2015-10-19 2017-04-20 Robert Bosch Gmbh Wischvorrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19732520A1 (de) * 1997-07-29 1999-02-04 Itt Mfg Enterprises Inc Scheibenwischvorrichtung
DE10009797B4 (de) * 2000-03-01 2008-05-15 Valeo Auto-Electric Wischer Und Motoren Gmbh Scheibenwischervorrichtung zum Wischen von Scheiben
DE10245662A1 (de) * 2001-12-19 2003-07-03 Bosch Gmbh Robert Scheibenwischvorrichtung
DE102004005002A1 (de) * 2004-01-30 2005-08-18 Valeo Systèmes d`Essuyage Verfahren zum Einstellen eines reversiblen Wischmotors
DE102005062695A1 (de) 2005-12-28 2007-07-05 Robert Bosch Gmbh Verfahren zum Einstellen des Wischwinkels bei einer Wischanlage mit Reversiermotor für eine Fahrzeugscheibe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009080394A1 *

Also Published As

Publication number Publication date
DE102007061744A1 (de) 2009-06-25
WO2009080394A1 (fr) 2009-07-02

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