FR2950589A1 - INSTALLATION OF VEHICLE WIPER - Google Patents

Abstract

Motor vehicle windscreen wiper system having a wiper arm (110) for wiping a window (140) of the vehicle. The installation (100) moves the arm (110) between a first inverting position (150) at the lower edge (141) of the pane (140) and a second inverting position (151) at the level of one side (142) of the window (140). The installation (100) may further move the arm (110) between the first inverting position (150) and a third inverting position (152) at the side (142) of the pane (140). The wiping between the first and third inverting positions (150, 152) corresponds to a wiping field larger than that between the first and second inverting positions (150, 151). The invention also relates to a control installation (120) and a method of wiping a window (140) of a vehicle.

Description

FIELD OF THE INVENTION The present invention relates to a motor vehicle windscreen wiper system comprising a wiper arm for wiping a window of the vehicle, the windscreen wiper system moving the wiper arm mirror for wiping the window between a first inverting position at the lower edge of the window and a second inverting position at one side of the window. The invention also relates to a device for controlling the movement of a wiper arm for wiping the window of a motor vehicle, the control device moving the wiper arm between a first inversion position. at the lower edge of the window and a second inversion position at one side of the window.

Finally, the invention relates to a method of wiping the window of a motor vehicle according to which the wiper arm is moved between a first inversion position at the lower edge of the window and a second inversion position. at one side of the glass.

State of the art The windscreen wiper installations of a motor vehicle window are known according to the most diverse embodiments. The wiper installations include a wiper motor for periodically moving a wiper arm on the window between a low invert position and a high invert position. The wiper arm carries a rubber wiper blade against the glass. The movement of the wiper arm scraps water and dirt from the glass. Usually, the wiper motor is a circular motion motor that rotates only in one direction of rotation. To convert the rotational movement into a periodic pivoting movement of the wiper arm, a mechanical device is provided, for example in the form of a crank drive.

2 Known wiper installations comprise two wiper arms, one on the driver's side and the other on the passenger's side. These wipers operate in parallel or in opposite directions. In the case of parallel operation, the wiper arms will be rotated in the same direction and in the case of countercurrent operation, the arms will be rotated in opposite directions to each other. In both embodiments, the upper reversing point of the driver side wiper arm is at the side of the window where column A of the vehicle body is usually located. In the case of operation in opposite mode, this is also the case of the driver. Usually an interval or reserve is provided between the top position of the wiper arm and column A. This distance prevents the wiper arm from bumping against column A during operation. of the wiper installation because as the speed of the vehicle increases, the wiper arm is pushed further and further towards the column A by the force exerted by the wind or the High inversion position shifts more and more towards the column A. That is why there is provided a generally wipless area between the column A and the high inversion position. The consequence is that on the affected side of the glass a corner of dirt or dust develops which limits the field of vision and thus reduces the safety of driving.

OBJECT OF THE INVENTION The object of the present invention is to develop means making it possible to wipe a window of a motor vehicle better. DESCRIPTION AND ADVANTAGES OF THE INVENTION To this end, the invention relates to a wiper installation of a motor vehicle of the type defined herein characterized in that the installation further moves the wiper arm between the first position of the vehicle. inversion and a third inversion position at the side of the window, and

3 wiping between the first and third inverting position corresponding to a larger wiping field than wiping between the first and second inverting position. The invention also relates to a control installation of the defined type characterized in that the control installation is further moved the wiper arm between the first inversion position and a third inversion position at the side of the window, the wiping between the first and the third inversion position corresponding to a wiping field larger than the wiping between the first and the second inversion position. Finally, the installation relates to a control method of the type defined here characterized in that the wiper arm is further moved between the first inversion position and the third inversion position at the side of the window, wiping between the first and the third inverting position corresponding to a larger wiping field than wiping between the first and second inverting positions.

In other words, the invention proposes a motor vehicle wiper system comprising a wiper arm for wiping a vehicle window. The wiper assembly moves the wiper arm between a first inverting position in the area of one side of the window. The windscreen wiper assembly is further adapted to move the wiper arm further between the first inverting position and a third inverting position at the side of the window; wiping between the first and the third inverting position corresponds to a larger wiping field than wiping between the first and the second reversing position.

The third inversion position provided additionally allows the washing installation to increase the wiping field at the side of the window. This helps to eliminate the accumulation of dirt or snow in this area and to remove the dirt or dust that has already been highlighted. The wiper installation allows to have a field

4 of greater vision or to avoid deteriorating this field of vision parasitically. The additional wiping between the first and the third inversion position may depend in this wiper installation, certain operating conditions. According to a preferred embodiment, the wiper installation performs the wiping of the window between the first and the third inversion position only if the speed of circulation of the vehicle is less than a predefined speed. This avoids that at the time of wiping between the first and third inversion position, the wiper arm does not abut against a column A of the vehicle in the area of the side of the windshield. According to another preferred embodiment, the wiper installation in the operating mode of the windscreen wiper installation, has a first and a third inversion position when windshield washer fluid arrives on the window. Such a mode of operation can be requested by the driver who will actuate for example the command to clean the glass. The windshield washer fluid safely removes dirt from the glass side area. According to another preferred embodiment, the windscreen wiper system wipes the window between the first and the third inversion position, regularly after a predetermined number of wiping cycles or wiping strokes between the first and second inversion positions. This prevents a corner of dirt or snow in the area of the side of the glass and this very reliably. According to another preferred embodiment, the wiper installation further comprises a drive installation connected to the wiper arm for driving the arm. This drive installation comprises for this purpose a reversible motor to remove the mechanical device used in the usual rotor motors, for example when removing the crank drive. It is thus possible to set the different reversing positions of the wiper arm with a very high accuracy. This is particularly the case if according to another preferred embodiment, the drive installation comprises a direct drive motor. According to the invention, there is further provided a control system for controlling the movement of the wiper arm. The control facility moves the wiper arm between a first inverting position at a lower segment of the pane and an opposite inverting position at one side of the pane. The control facility further allows the wiper arm to be moved between the first inverting position and a third inverting position at the side of the window so that the wiping between the first and the third Inverting position is on a larger wiping field than wiping between the first and second inverting positions.

Correspondingly, the control system makes it possible, by virtue of the wiping movement passing through two reversing positions, to further free the dirt or snow wedge at the side segment of the window and thus to avoid deterioration of the field of vision or eliminate the area of dirt or snow previously formed. Such a function can also be realized afterwards by replacing the control installation of a windshield wiper system already integrated in the vehicle and adapting it appropriately. The invention further relates to a method of wiping a window of a motor vehicle. According to the method, the wiper arm is moved between a first inversion position at a lower segment of the window and a second inversion position at the side of the window. The wiper arm is further moved between the first inverting position and a third inverting position at the side of the window so that the wiping is between the first and third inverting positions. on a wiping field larger than that between the first and the second inverting position. This avoids a corner of dirt or snow on the side of the glass or eliminates dirt already deposited or a corner of snow.

Drawings The present invention will be described below in more detail with the aid of embodiment examples shown in the accompanying drawings in which: - Figure 1 is a schematic view of a wiper installation in the process of wiping a windshield of a motor vehicle according to a first mode of operation, - Figure 2 shows the installation of wiper during wiping of a windshield in a second mode of operation ensuring a wiper field enlarged compared to that of the first mode of operation. DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION FIGS. 1 and 2 show a windshield 140 of a motor vehicle and a wiper system 100 while wiping the windshield 140 according to a first embodiment of the invention. wiping (normal or regular wiping mode) in FIG. 1 and in a second wiping mode (FIG. 2) according to which the wiping takes place over a wiping range greater than that of the first wiping mode. The windshield 140 has a lower edge 141 and laterally, each side 142. The sides 142 may correspond to lateral limits of the vehicle including the columns A and in the case of a cabriolet, the parts of the frame surrounding the pare 140. This variant is not shown. The windscreen wiper system 100 has two wiper arms 110 that sweep the windshield 140 in opposite directions by reciprocating. Each wiper arm 110 is provided with a wiper blade applied against the window (windshield) 140 to scrape water and dirt deposited on the window 140, by a rotational or pivoting movement of the wiper arm 110.

To pivot the arms 110, each is connected to a drive installation 130. Each drive installation 130 comprises a reversible electric motor controlled in different directions of rotation depending on the reciprocating motion desired for the drive arm. wiper 110. The reversible motor is preferably 6

7 as a direct link motor, connected directly to the wiper arm 110. This makes it possible to move the wiper arm 110 without mechanical coupling and thus the movement will be in a relatively precise manner.

The windscreen wiper system 100 further comprises a control installation 120 for controlling or regulating the drive installations 130 and thereby controlling the movement of the wiper arms 110. reversing the direction of rotation of the drive systems 130 to reverse the pivotal movement of the wiper arms 110 at appropriate locations in the windshield 140. For this, the windshield wiper assembly 100 includes in addition to a position capture installation to be able to enter the respective current position of the wiper arm 110 on the window 140. The position capture installation may for example comprise position sensors fitted to drive installations 130 (These sensors are not shown) to provide rotational angle information or position information corresponding to the control facility 120 (this is represented by the double arrow). che in Figures 1 and 2). The control installation 120 further comprises one or more interfaces 121 which connect the installation 120 to a bus system 160 of the motor vehicle and to its on-board network. The control facility 120 can receive information and signals from other components and installations of the motor vehicle 25 via the bus system 160 and the interface 121. A possible example is that of a plant controlled by the user of the vehicle to start the wiping of the windshield 140 and which is usually done using the wiper control lever. It is also possible to envisage a rain sensor to control the "automatic" wiping of the window 140 in the event of rain. In the case of the normal wiping mode shown in FIG. 1, each of the two wiper arms 110 is periodically pivoted in one direction and the other by means of the control unit 120 between a first inversion position 150 at the lower edge 141 of the windshield 140 and a second position

The first inverting position 150 of the wiper arm 110, shown in FIG. 1, is shifted substantially parallel to the first one. inverting position 150 of the other wiper arm 110; it can also be a storage position of the wiper arm 110; this position is that of the wiper arm 110 when the windscreen wiper system 100 is stopped. As further shown in FIG. 1, a gap has been left between the second inverting position 151 of the wiper arm 110 and the corresponding side 142 of the windshield 140 or a limitation provided therein ( for example column A of the vehicle). In the normal operating mode of the windscreen wiper system 100. At the high traffic speeds of the vehicle, this "safety interval" makes it possible to avoid, if necessary, the abutment of the wiper arm 110 which is increasingly spaced towards the side 142 or a delimitation (eg column A) existing there, as the speed of the vehicle increases. As a result, however, a corner of dirt or snow can develop in this area as shown in FIG. 1 which adversely affects the visibility especially of the driver's side. To avoid such a reduction in visibility, the windscreen wiper system 100 or its control installation 120 is made in addition to the first wiping mode shown in FIG. 1, a second wiping mode shown in FIG. 2. In this wiping mode, the wiper arms 110 are rotated between the first inverting position 150 and a third inverting position 152 in a sweeping motion. The third inverting position 152 is closer (on average) to the corresponding side 142 of the windshield 140 as compared to the second inverting position 151 which results in a larger wiping field and removing dirt or soil. The third inverting position 152 may be directly adjacent to the side 142 of the vehicle window 140 or column A to allow the visibility field to be maximized through the windshield. 140. To move a wiper arm

9 ice 110 beyond the second inversion position 151 to the third inversion position 152, for example increases the set point of the reversible motor adjustment angle and which can be predefined by the reversible motor of the drive installation 130 for the high reversing position. The wiping (additional) in the second wiping mode diagrammatically shown in FIG. 2, of the windscreen wiper system 100 may depend on certain conditions or certain hypotheses. The windscreen wiper system 100 can in particular be made to wipe between the first and the third inverting position 150, 152 below a predetermined traffic speed of the vehicle or to allow the execution of this function to avoid at the high traffic speeds of the vehicle where appropriate the coming into lateral abutment of the wiper arm 110.

For this, the control installation 120 receives via the bus system 160 and the interface 121, a speed information provided by the tachometer of the vehicle; this speed information represents the current speed of the vehicle. From here it is not permissible to wipe the windshield 140 according to the second wiping mode with a large wiping field provided by the control installation 120 only below a predefined limit speed and to neutralize this operating above this speed. The speed limit is for example equal to 50 km / h. Such a speed-dependent mode of operation (or actuation of the high reversing position) can be compared in a relatively simple manner to an operating program in the control system 120. Wiping the windshield 140 according to the second wiping mode will be with a greater wiping angle than if it were made by a choice corresponding to a maneuver intervention on the user of the vehicle. For example, it is possible to envisage an intermittent wiping function at the control, in which the user actuates the wiper lever and the function allows wiping of the window 140 during a predetermined number of movements.

10 wiper and then apply cleaning fluid to the glass 140 (not shown). In this mode of operation, an appropriate control signal transmitted through the bus system 160 and the interface 121 can be transmitted to the control station 120. This operation of the control system 120 produces the wiping according to the second wiping mode with an enlarged wiping field for a predefined number of wiping cycles. In so far as the vehicle is entering a speed higher than the predetermined speed limit, the control installation 120 can prohibit wiping according to the second wiping mode and, for example, execute in its place wiping according to the first mode of wiping. 'wiping. In addition, the wiper system 100 can be made differently so that the user can start wiping (depending on the speed) of the windshield 140 in the second wiping mode with a field of view. increased by operating the wiper control) without applying a wiper fluid. In addition or alternatively, the control installation 120 may also perform depending on the wiping requested by the user (via the wiper control) or by a rain sensor (in the as it exists) wiping the windshield 140 wiping in the second wiping mode, to perform regularly a number of wiping cycles according to the first wiping mode. For example, to wipe the windshield 140, each time after ten wiping cycles performed between the first and second inverting positions 150, 151, a single wiping cycle will be executed between the first and the third position of the wiper. inversion 150, 152. This embodiment may also be subject to the condition that the speed of circulation of the vehicle is less than a predefined limit speed. The operation of the windscreen wiper system 100 or its control system 120 described above, in addition to wiping in a first wiping mode also wiping in a second wiping mode with a larger wiping field

11 which can be realized subsequently in that one adapts for example the control program recorded in the control station 120. In a variant, the control installation 120 can be replaced. This makes it possible to complete in a relatively simple manner a wiper installation 100 already equipping a motor vehicle with an inversion means. The wiper system 100 or the method of wiping the window 140 described with reference to FIGS. 1 and 2 are examples of preferred embodiments of the invention. Other embodiments are possible with variant features or combinations of features. For example, the control facility 120 may be connected to other facilities or cables only by the bus system 160 to receive signals or information.

Another embodiment relates to the "separate" control installation 120 shown in FIGS. 1 and 2. In contrast to this representation, the control installation 120 can also be implemented in the form of two separate drive installations 130 , associated with control installations; these control systems communicate with each other for example in the form of a master / slave link to enable the operation described above. It is also possible, depending on the wiper system 100 described above, for a wiper system operating in the same direction, with two wiper arms, next to a wiping between the first and the second inversion position, furthermore providing (at least on the driver's side) the wiping between the first and the third inversion position with a larger wiping field, to prevent its visibility is diminished.30 NOMENCLATURE OF MAIN ELEMENTS

100 Wiper system 110 Wiper arm 120 Control unit 121 Interface 130 Drive installation 140 Window / windshield 141 Bottom edge 142 Side of window 150 First position of reversal 151 Second position of inversion 152 Third inversion position 160 Nozzle system15

Claims (1)

CLAIMS 1 °) Installation of wiper of a motor vehicle having a wiper arm (110) for wiping a window (140) of the vehicle, the windscreen wiper system (100) moving the wiper arm -glace (110) for wiping the window between a first inverting position (150) at the lower edge (141) of the window (140) and a second inverting position (151) at one side ( 142) of the window (140), wiper installation characterized in that it is performed to further move the wiper arm (110) between the first inverting position (150) and a third position inversion (152) at the side (142) of the window (140), the wiping between the first and third inverting positions (150, 152) corresponding to a wiping field larger than the wiping between the first and second inverting positions (150, 151). 2) Windscreen wiper according to Claim 1, characterized in that it (100) is designed to wipe the window (140) between the first and the third reversing position (150, 152) only when the motor vehicle is traveling at a speed lower than a predefined speed. Windscreen wiper installation according to Claim 1, characterized in that it (100) is designed to wipe the window (140) between the first and the third inverted position (150, 152). ) in an operating mode of the installation (100) in which windshield wiper liquid is applied to the window (140). 4) Wiper system according to claim 1, characterized in that it (100) is designed to wipe the window (140) between the first and the third inverting position (150, 152 ), regularly after a predefined number of wiping cycles performed between the first and the second reversing position (150, 151) .35 14 5 °) Windscreen wiper arrangement according to claim 1, characterized in that it comprises a drive installation (130) connected to the wiper arm (110) for moving the wiper arm (110), the drive installation having a reversible motor. 6 °) wiper installation according to claim 5, characterized in that the drive installation (130) comprises a direct drive motor. 7 °) Control installation for controlling the movement of a wiper arm (110) used to wipe a window (140) of a motor vehicle, the control device (120) being made to move the arm wiper (110) for wiping the window (140) between a first inverting position (150) at the lower edge (141) of the window (140) and a second inverting position (151) at the one side (142) of the window (140), characterized in that the control unit (120) is arranged to further move the wiper arm (110) between the first inverting position (150) and a third inverting position (152) at the side (142) of the pane (140), wiping between the first and third inverting positions (150, 152) corresponding to a field d wiping greater than wiping between the first and second inverting positions (150, 151). Control plant according to claim 7, characterized in that it comprises an interface (121) for receiving speed information, the speed information representing the actual speed of the motor vehicle and the control installation ( 120) is controlling the wiping of the window between the first and third reversing positions (150, 152) only if the motor vehicle is traveling at a lower speed than a predefined speed. 9 °) A method of wiping a window (140) of a motor vehicle in which the wiper arm (110) is moved between a first inversion position (150) at the lower edge (141). ) of the window (140) and a second inversion position (151) at one side (142) of the window (140), characterized in that the wiper arm is further moved between first inverting position (150) and the third inverting position (152) at the side (142) of the pane (140), wiping between the first and third inverting positions (150, 152 ) corresponding to a wiping field larger than the wiping between the first and the second inverting position (150, 151). Method according to claim 9, characterized in that the wiping of the window (140) between the first and the third inverting position (150, 152) is performed only if - the vehicle is traveling underneath of a given speed, or washer fluid is applied to the window (140), or a predefined number of wiping cycles between the first and second reversing positions (150, 151) has been applied. executed. 30