WO2006119881A1 - Method for providing a wiper control signal - Google Patents

Method for providing a wiper control signal

Info

Publication number
WO2006119881A1
WO2006119881A1 PCT/EP2006/004059 EP2006004059W WO2006119881A1 WO 2006119881 A1 WO2006119881 A1 WO 2006119881A1 EP 2006004059 W EP2006004059 W EP 2006004059W WO 2006119881 A1 WO2006119881 A1 WO 2006119881A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
signal
control
wiper
humidity
unit
Prior art date
Application number
PCT/EP2006/004059
Other languages
German (de)
French (fr)
Inventor
Guido Hertwig
Original Assignee
Daimlerchrysler Ag
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

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60HARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00Heating, cooling or ventilating devices
    • B60H1/00642Control systems or circuits, control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00785Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by the detection of humidity or frost
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60SSERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00Cleaning of vehicles
    • B60S1/02Cleaning windscreens, windows or optical devices
    • B60S1/04Wipers or the like, e.g. scrapers
    • B60S1/06Wipers or the like, e.g. scrapers characterised by the drive
    • B60S1/08Wipers or the like, e.g. scrapers characterised by the drive electrically driven
    • B60S1/0818Wipers 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

Abstract

Method for providing a wiper control signal for controlling a windscreen wiper of a motor vehicle, in which a wetting signal is determined which is indicative of the intensity of wetting of a predefinable region of a motor vehicle windscreen with water. A wiper control signal is acquired using the wetting signal and the wiper control signal is provided for actuating the windscreen wiper. An atmospheric humidity signal which is indicative of the relative atmospheric humidity in a predefinable motor vehicle environment is used in order to acquire the wiper control signal.

Description

A method of providing a wiper control signal

The invention relates to a method of providing a wiper control signal for control of a windshield wiper according to claim 1 and a control device for performing this method.

There are known devices for the control of windscreen wipers, in which detected by arranged on the vehicle window sensors, the amount of moisture on the vehicle windscreen, wherein a sensor on the windshield to be wiped in the region of the wiper emits a sensor signal in dependence on the amount of moisture.

From DE 44 17 436 Al a method for controlling a windshield wiper is known in which when there is a minimum degree of moisture on the windshield, a wiping operation is enabled. Is a first humidity level determined is below a certain moisture level in a first measurement cycle, the first moisture level determined is compared with a result obtained in a subsequent measuring cycle, the second level of moisture. By this comparison, it is concluded that a slowly increasing humidification of the disc as such. As is done in the drizzle. Hereby, the wiper may already be activated when not lying over a predetermined threshold value for this degree of moisture is present, as by slowly increasing moisturisation of the disk even at lesser moistening thereof is closed to a wiping needed.

From DE 39 02 231 Al an apparatus for controlling a wiper of a vehicle is known in which a resistive moisture sensor on the windshield of the vehicle is provided, whose resistance value changes depending on the humidity. Did this resistance value below a certain threshold, and he takes off, the windshield wipers are switched. Means of the stated moisture sensor, it is possible to distinguish a frost or ice layer of a moisture layer. From this publication, it is also known to determine the windshield moisture through feeds high-frequency electrical measurements or to measure Kapazitats-, Induktivitats- or Dampfungsanderungen. Furthermore, it is known to refer to a combination of Kapazitats-, Induktivitats- or Dampfungsanderungen to control a windshield wiper.

It is also known to adjust the rain sensors on presettable parameter sets to a predetermined sensitivity. Here, a Randelrad, one of the predefined sensitivity levels can be selected by the driver via an input unit, for example.

Starting from the known state of the art, it is an object of the invention to provide a wiper control signal for control of a windshield wiper, which is based on a highly reliable determination of a wiper requirements and which allows a particularly comfortable wiper control. This object is achieved by a method having the features of patent claim 1 and by a control device for performing such a method with the features of patent claim 6.

In the method of providing a wiper control signal for control of a windshield wiper of an indicative for an intensity of a wetting a predeterminable range of a motor vehicle window pane with water wetting signal is determined. This signal is preferably also indi- kativ for other liquids such as a mixture of water and antifreeze, or water and dirt. It is determined by taking the wetting signal, a wiper control signal and the wiper control signal is provided for actuating the wiper. Here, the wiper control signal can be further processed for wiper activation or the right wiper activating signal. In particular, the wiper driving voltage can be understood by the wiper control signal. To determine the wiper control signal an indicative of the relative humidity in a predetermined vehicle ambient humidity signal is used. The vehicle environment is predetermined by the mounting location of the sensor for the humidity signal or by the environment in which correlates the actual existing relative humidity with the humidity signal. A high degree of correlation to the humidity signal with the actual humidity in the outside of the front windscreen is particularly advantageous.

The inventive method has the advantage that a particularly reliable and convenient control of the wiper is made possible by means of the so provided wiper control signal to advantage. Especially in weather situations, WEL che deviate from a standard weather, such as rain or spray and similar situations where there is high humidity or dryness, that is, when a low humidity prevails, the wiper control particularly well adapted to the surrounding situation be done and particularly reliable, so that comfort and safety for the driver and passengers is achieved. If dry, the occurrence of defects wiping operations can be minimized and at high humidity, the release behavior can be improved due to higher sensitivity.

The need for the driver also manually activated wiping operations can also be reduced as unwanted wiping with a dry to the front windscreen, so that an unnecessary mechanical stress on the wiper blades and the disk can be avoided.

Advantageous developments and refinements are specified in the dependent claims.

It is advantageous if the humidity signal is determined by taking an dew point and a temperature signal, particularly if the humidity signal comprise the dew point signal and the temperature signal. Dew point and temperature signal are particularly reliable and good evidence of the actual existing humidity.

It is advantageous to determine the humidity signal while referring to the operating data of an air conditioner. In particular dew point and temperature signal can be determined by means of operating data of an air conditioner. If the humidity signal detected only while referring to the operating data of an air conditioner, a particularly cost-effective implementation of the inventive method in all vehicles is possible, which have air conditioning.

To further increase the comfort and for additional adaptation to different wiper individually needs can be preset by the driver by means of an input unit, such as a space provided Rändelradrad or an electronic input console, a wiping sensitivity signal. This thereby predeterminable wiping sensitivity signal is additionally used to provide a wiper control signal.

A control device for implementing the method according to the invention comprises a wetting signal receiving unit for detecting the wetting signal from the Benetzungssensorein- integrated, a signal processing unit for determining the wiping demand signal, an output unit for providing the wiping demand signal and a Luftfeuchtigkeitssignalerfas- sungseinheit for detecting the humidity signal.

For a particularly space-optimized design, the signal processing unit and the wetting signal receiving unit are arranged in a common housing. In particular, the signal processing unit and the Benetzungssen- soreinheit are arranged in a common housing.

The control device may further comprise a specially provided for this purpose humidity sensor unit for determining the humidity signal.

In a further embodiment of the control apparatus, the wetting sensor unit is an optical rain sensor unit which determines based on a detected Anteiiswert reflected on a vehicle window light the wetting signal.

Of course, other combinations and arrangements of said units in accordance with the available installation space and attachment site are possible.

A Ausfϋhrungsbeispiel the invention is illustrated in the drawing and will be described in more detail below. It shows :

Fig. 1 shows a flowchart of an inventive method for providing the wiper control signal,

Fig. 2 is a block diagram of a control device according to the invention for performing the method.

An embodiment of the method for providing a wiper control signal is shown in Fig. 1 in the steps 1 to 7. It is determined in step 1, a indicative of an intensity of a wetting of a motor vehicle window pane with water or a similar liquid wetting signal. For this purpose, a rain sensor is arranged on the vehicle window preferably. The output signal of the rain sensor can be used as wetting signal or it is determined while referring to this output signal of the rain sensor, a wetting signal. In step 2, a humidity signal is determined, which is indicative of the relative humidity in a predetermined vehicle surrounding area. This humidity signal consists for example of a result obtained in Step 5 of the air conditioner dew point signal that is indicative of the dew point of the air in the vehicle environment, and also conditioning system of the KIi- determined in step 6 Temperatursignai, soft indicative of the air temperature in the vehicle environment , It can be found in the humidity signal in step 7 of pulling the Taupunktssignals and the humidity signal. The humidity detected signal can then, for example, are transmitted over an existing bus architecture in the vehicle. The dew point and temperature signal set as a measurement or control data of the air conditioner operating data of this air conditioner. Alternatively, the dew point and temperature signal can be used in Step 5 and Step 6 other operating data, ie measurement or control data of the air conditioning be used as humidity signal or from these variables, the humidity signal be determined. Steps 5, 6 and 7 may also be taken together.

In step 3, a wiper control signal is determined by taking the wetting signal. In the subsequent step 4, the wiper control signal for driving the windshield wiper is provided.

Fig. 2 shows a block diagram of a control device for carrying out the inventive method. In this case, environmental control device (11) summarizes the Benetzungssignalsemp- arresting unit (12), the signal processing unit (13) for determining the wiping demand signal, the output unit (14) for providing the wiper demand signal and the air humidity tigkeitssignalserfassungseinheit (15) for detecting the humidity signal. The Luftfeuchtigkeitssignalserfassungs- unit (15) is connected via a data channel with the air conditioner (17). The data channel may be a common data bus, such as a data bus, a data line, a radio link or any other type of signal transmission. The input unit (18), z. B. a knurled wheel, a switch, a key input unit or an electronic input unit is connected via a data channel to the signal processing unit (13). The Benetzungssen- soreinheit (19), for example an IR-rain sensor unit, an optical rain sensor unit or other rain or washer wetting sensor unit is connected via a data channel with the wetting signal receiving unit (12). The wiper (20) is connected via a data channel to the output unit (14). Within a data channel in each case, one or more control or data processing devices may be located. This can change the transmitted signals or process basis, drawing more signals and input variables.

The control device (11) and the wetting sensor unit (19) are preferably arranged in a single casing, or as a connected unit. Hereby, the installation effort and space requirement is reduced. Preferably, the control device (11) and the wetting sensor unit (19) are combined in the so-called rain sensor. This is, for example, in or on the interior rearview mirror arranged or the holding device, for example at the foot of the windshield.

Alternatively, the control device (11) can also be combined in another control unit or another control device may be arranged in the vehicle.

By means of the humidity signal, the threshold value for a wiper needs recognition modified, in particular lowered. There is the possibility for the driver to specify a wiping sensitivity, for example, by taking on a wiper sensitivity signal influence, so the wiper sensitivity signal can be modified by means of the humidity signal, or it can be customized Mitteis the humidity signal, the wiping sensitivity.

The in the dependent claims in the specification and description of the figures illustrated embodiments and combinations of features are not exclusive of other combinations of the stated features.

Claims

DaimlerChrysler AGPatentansprüche
1. A method of providing a wiper control signal for control of a windshield wiper of a motor vehicle wherein
- a is determined for an intensity of a wetting a predeterminable range of a motor vehicle window pane with water indi- katives wetting signal,
- while referring to the wetting signal a wiper control signal is determined and
- the wiper control signal is provided for actuating the screen wiper, characterized in that
- is used an indicative for the relative humidity in a specifiable vehicle environment humidity signal for determining the wiper control signal.
2. A method of providing a wiper control signal according to claim 1, characterized in that the humidity signal is determined by taking an Taupunktssignals and a temperature signal.
3. A method for providing a Wischersteuersignais according to claim 2, characterized in that the humidity signal, the Taupunktssignal and
includes temperature signal.
4. A method of providing a wiper control signal to one of the preceding claims, characterized in that the humidity signal while referring to operation data of an air conditioner is detected.
5. A method of providing a wiper control signal to one of the preceding claims, characterized in that in addition a predefinable by the driver by means of an input unit wiper sensitivity signal is used.
6. Control device (11) for performing a method according to any one of the preceding claims with
- a wetting signal receiving unit (12) for determining the wetting signal,
- a signal processing unit (13) for determining the wiping demand signal,
- an output unit (14) for providing the wiping demand signal, characterized in that
- the control device comprises a detection unit (15) for detecting the humidity signal.
7. Control device (11) according to claim 6, characterized in that the control device (11) includes a humidity sensor unit (20) for determining the humidity signal.
8. Control device (11) according to any one of claims 6 or 7, characterized in that the signal processing unit (13) and the wetting sensor unit (19) are arranged in a common housing.
9. Control device (11) according to any one of claims 6 to 8, characterized in that the wetting sensor unit (19) is an optical rain sensor unit, which based determined on a detected unit value of to a vehicle wheel reflected light, the wetting signal.
PCT/EP2006/004059 2005-05-10 2006-04-29 Method for providing a wiper control signal WO2006119881A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200510021443 DE102005021443A1 (en) 2005-05-10 2005-05-10 A method of providing a wiper control signal
DE102005021443.6 2005-05-10

Publications (1)

Publication Number Publication Date
WO2006119881A1 true true WO2006119881A1 (en) 2006-11-16

Family

ID=36763753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/004059 WO2006119881A1 (en) 2005-05-10 2006-04-29 Method for providing a wiper control signal

Country Status (2)

Country Link
DE (1) DE102005021443A1 (en)
WO (1) WO2006119881A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011115590A1 (en) * 2011-10-11 2013-04-11 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Adaptive control device for controlling e.g. windscreen wiper arrangement of motor car, has wiper arms mounted with respect to pane, where control device controls vehicle-specific control parameter over climate module of motor car

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902231A1 (en) 1989-01-26 1990-08-09 Voralp Ets Device for controlling a windscreen wiper
US5010289A (en) * 1989-02-15 1991-04-23 Fuji Jukogyo Kabushiki Kaisha Anti-frost system for a windshield of a motor vehicle
DE4417436A1 (en) 1994-05-18 1995-11-23 Vdo Schindling Controlling motor vehicle windscreen wipers
DE19709053A1 (en) * 1997-03-06 1998-09-17 Bosch Gmbh Robert Car cabin ventilation control device
EP0950587A1 (en) * 1998-04-18 1999-10-20 Volkswagen Aktiengesellschaft Switching device for a vehicle windscreen defrosting device
FR2789036A1 (en) * 2000-01-07 2000-08-04 Valeo Systemes Essuyage Method and device for preventing ice formation on automobile windscreen includes detection of ice presence/formation and actuator of wiper motor
US20030080871A1 (en) * 2001-10-26 2003-05-01 Hans-Michael Schmitt Sensor unit for detecting the wetting of a window
DE10232228A1 (en) * 2002-07-17 2004-01-29 Valeo Auto-Electric Wischer Und Motoren Gmbh Windscreen wiper and washer operating procedure measures the screen temperature and obscuration and heats screen with wiping if droplets created

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601913B1 (en) * 1986-07-24 1988-12-02 Manzoni Bouchot Sa Heating device for hygrometric probe controller wiper for vehicles.
US6118383A (en) * 1993-05-07 2000-09-12 Hegyi; Dennis J. Multi-function light sensor for vehicle
JPH10329651A (en) * 1997-06-03 1998-12-15 Toyota Motor Corp Autowiper device
DE19727323C2 (en) * 1997-06-27 2000-08-24 Daimler Chrysler Ag A method for external humidity-dependent control of a motor vehicle air-conditioning
GB9906932D0 (en) * 1999-03-26 1999-05-19 Rover Group A vehicle windscreen system
JP2002009891A (en) * 2000-06-23 2002-01-11 Ricoh Co Ltd Call transfer device and transfer information notification device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902231A1 (en) 1989-01-26 1990-08-09 Voralp Ets Device for controlling a windscreen wiper
US5010289A (en) * 1989-02-15 1991-04-23 Fuji Jukogyo Kabushiki Kaisha Anti-frost system for a windshield of a motor vehicle
DE4417436A1 (en) 1994-05-18 1995-11-23 Vdo Schindling Controlling motor vehicle windscreen wipers
DE19709053A1 (en) * 1997-03-06 1998-09-17 Bosch Gmbh Robert Car cabin ventilation control device
EP0950587A1 (en) * 1998-04-18 1999-10-20 Volkswagen Aktiengesellschaft Switching device for a vehicle windscreen defrosting device
FR2789036A1 (en) * 2000-01-07 2000-08-04 Valeo Systemes Essuyage Method and device for preventing ice formation on automobile windscreen includes detection of ice presence/formation and actuator of wiper motor
US20030080871A1 (en) * 2001-10-26 2003-05-01 Hans-Michael Schmitt Sensor unit for detecting the wetting of a window
DE10232228A1 (en) * 2002-07-17 2004-01-29 Valeo Auto-Electric Wischer Und Motoren Gmbh Windscreen wiper and washer operating procedure measures the screen temperature and obscuration and heats screen with wiping if droplets created

Also Published As

Publication number Publication date Type
DE102005021443A1 (en) 2006-11-16 application

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