EP3484754A1 - Unite d'essuyage pour vehicule automobile et procede de commande - Google Patents
Unite d'essuyage pour vehicule automobile et procede de commandeInfo
- Publication number
- EP3484754A1 EP3484754A1 EP17727933.8A EP17727933A EP3484754A1 EP 3484754 A1 EP3484754 A1 EP 3484754A1 EP 17727933 A EP17727933 A EP 17727933A EP 3484754 A1 EP3484754 A1 EP 3484754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- efficiency
- reducer
- electrical energy
- gearbox
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000009467 reduction Effects 0.000 claims abstract description 25
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 35
- 230000007423 decrease Effects 0.000 claims description 20
- 238000012546 transfer Methods 0.000 claims description 10
- 239000011521 glass Substances 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 6
- 238000012986 modification Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 4
- 230000015654 memory Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000010408 sweeping Methods 0.000 description 2
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- B60S1/0814—Wipers or the like, e.g. scrapers characterised by the drive electrically driven using several drive motors; motor synchronisation circuits
-
- 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
-
- 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
- B60S1/16—Means for transmitting drive
- B60S1/166—Means for transmitting drive characterised by the combination of a motor-reduction unit and a mechanism for converting rotary into oscillatory movement
Definitions
- the present invention relates to a wiper unit and a method for controlling the instantaneous speed of rotation of a drive motor of at least one wiper in a reciprocating motion on a glass surface of a vehicle. automobile.
- the wiper device comprises at least one electric motor that can drive a wiper blade in motion in order to wipe the glass surface of the vehicle.
- the electric motor is associated with a gearbox.
- the reducer generally used in the wiper devices comprises at least one toothed wheel meshing with a worm rotated by the motor.
- the instantaneous speed of rotation of the motor determines the wiper frequency of the wipers.
- the wiping can be carried out according to different scanning frequencies, in particular to adapt the sweeping frequency to the intensity of the rain.
- the sweep can thus generally be defined or chosen between an intermittent sweep, a normal frequency sweep or a high frequency sweep.
- the instantaneous speed of rotation of the motor is then controlled to correspond to this frequency setpoint.
- the present invention relates to a wiper unit for a motor vehicle comprising:
- At least one motor configured to drive at least one windscreen wiper back and forth on a glass surface of a motor vehicle
- controller configured to determine an engine command, characterized in that the controller is configured to determine the motor control by taking into account at least one variable parameter related to the efficiency of the gearbox so as to counterbalance the variation of the efficiency of the gearbox by a modification of the electrical energy to supply the engine.
- the controller can be configured to increase, for example proportionally to the reduction in the efficiency of the gearbox, the electrical energy supplied to the motor when the evolution of the variable parameter tends to reduce the efficiency of the gearbox.
- the controller can be configured to reduce, for example proportionally to the increase in the efficiency of the gearbox, the electrical energy supplied to the motor when the change in the variable parameter tends to increase the efficiency of the gearbox.
- variable parameter related to the effectiveness of the gearbox is estimated or measured, at least one variable parameter related to the efficiency of the gearbox is chosen from:
- the wiping unit comprises a pulse width modulator configured to be controlled by the controller to control the motor
- the motor is configured to drive at least one rotating screw, the gearbox comprising at least one rotary transfer member meshing with the worm.
- the invention also relates to a method for controlling the instantaneous speed of rotation of a drive motor of at least one windshield wiper in a reciprocating motion on a glass surface of a motor vehicle, characterized in that the control of the motor is determined by taking into account at least one variable parameter related to the efficiency of the gearbox arranged at the output of the motor, to counterbalance the variation of the efficiency of the gearbox by a modification of the energy electrical supply to the engine.
- control method taken alone or in combination:
- the electrical energy supplied to the motor is increased by a determined value in relation with the reduction of the efficiency of the gearbox, when the instantaneous speed of rotation of the motor decreases and is reduced by a determined value in relation to the increase the effectiveness of the gearbox, the electrical energy supplied to the motor when the instantaneous speed of rotation of the motor increases,
- a given value is increased in relation to the reduction of the efficiency of the gearbox, the electrical energy supplied to the motor in a scanning direction and reduced by a determined value in relation to the increase in efficiency of the gearbox, the electrical energy supplied to the motor in the other scanning direction,
- a given value is increased in relation to the reduction of the efficiency of the gearbox, the electric energy supplied to the motor when the torque delivered by the motor increases and decreases by a determined value in relation to the increase of the efficiency of the gearbox, the electrical energy supplied to the motor when the torque delivered by the motor decreases.
- Figure 1 is a schematic view showing a glass surface of a motor vehicle and a wiper unit of the vehicle.
- FIG. 2 represents an example of a reducer of the wiping unit of FIG.
- FIG. 3 shows a schematic view of elements of the wiping unit of Figure 1.
- FIG. 4 shows an illustrative graph having on the abscissa the instantaneous speed of rotation of the motor of the wiping unit (in rpm) and on the ordinate the efficiency (in%) of the reduction gear of the wiping unit.
- the graph has two curves, a curve C A (round) showing the effectiveness of the reducer in a scanning direction, for example downward, and a curve C B (cross) showing the effectiveness of the reducer in the other direction, by example amount.
- FIG. 5 shows an illustrative graph having in abscissa the temperature of the reducer and in ordinate the efficiency (in%) of the reducer.
- the graph has two curves, a curve C c (dashed) showing the effectiveness of the reducer in a scanning direction and a curve C d (solid lines) showing the effectiveness of the reducer in the other direction.
- Figure 1 shows a wiper unit 1 for a motor vehicle.
- the wiper unit 1 comprises at least one motor 2, at least one gearbox 3 arranged at the output of the motor 2 and a controller 4.
- the engine 2 is configured to drive at least one wiper 5, 6 in a reciprocating motion on the glass surface 1 1 of the vehicle.
- the back and forth movement consists of an alternation of descending and ascending movements.
- the downward direction corresponds to the movement of the wipers 5, 6 from the top to the bottom, the upward direction corresponding to the movement of the windscreen wipers 5, 6 from bottom to top.
- the wiper unit 1 comprises for example two motors 2 associated with the glass surface 1 1 front of the vehicle (windshield), a motor 2 driving each drive arm 5, each drive arm 5 driving a broom d wiper 6.
- the DC motor 2 conventionally comprises a stator and a rotor.
- the rotor shaft carries at least one worm 8, for example metal.
- the gearbox 3 comprises a gear transmission comprising at least one rotary transfer member 9 interposed between the worm 8 and an output shaft, meshing with the worm 8.
- the rotary transfer member 9 comprises for example a wheel or a toothed sector, for example metal material or plastic material.
- the output shaft is for example coaxial with the rotary transfer member 9 and integral in rotation with the rotary transfer member 9.
- the output shaft is intended to be assembled with a wiper element to be driven. in rotation, such as a crank (or lever) of a transmission device of a wiper mechanism or such as a drive arm head.
- the controller 4 is configured to control the instantaneous speed of rotation of the engine V from a command of the engine C, in particular determined according to a scanning frequency setpoint B, in order to modify the scanning frequency of the at least one wiper. ice cream 5, 6.
- the controller 4 comprises one or more microcontrollers or computers, having memories and programs adapted to perform calculations, receive and give instructions to the elements to which it is connected. It is for example the computer on board of the motor vehicle.
- the scanning frequency setpoint B can be controlled by the driver via a lever or any form of the actuator in the passenger compartment, usually near the steering wheel or on the dashboard.
- the user can, for example, choose between several scanning frequency set points B comprising the stop position for which the windscreen wipers 5, 6 are deactivated, a single scan, an intermittent scanning comprising a scanning number by unit of time defined by the user, for example at by means of a wheel arranged on the lever, a continuous scanning at normal frequency and a continuous scanning at high frequency.
- Some vehicles are also equipped with a rain sensor 13 to determine if it rains and the intensity of the rain.
- the user can also select an automatic mode in which the scanning frequency setpoint B is selected from the off position, a continuous normal frequency sweep or a high frequency continuous sweep depending on the processing of the information provided by the rain sensor 13.
- the wiper unit 1 may comprise a pulse width modulator PWM ("Pulse Width Modulator") configured to provide a control of motor C by modulating the duration of a succession of pulses, from a voltage U of the power supply 7 and a control signal S.
- PWM Pulse Width Modulator
- the controller 4 is configured to determine the control of the motor C making it possible to control the instantaneous speed of rotation of the motor V also as a function of at least one variable parameter related to the efficiency of the motor. reducer 3 so as to counterbalance the variation of the efficiency of the gearbox 3 by a modification of the electrical energy to be supplied to the motor 2.
- the modification of the electrical energy can be an increase or a decrease, which can be proportional or not to the variation of efficiency of the gearbox 3, which can be continuous or discrete (in steps) and can be determined according to predefined tables, the predetermined values being able to depend on the characteristics of the wiping unit 1.
- the controller 4 can be configured to increase, for example proportionally to the reduction in the efficiency of the gearbox 3, the electrical energy supplied to the motor 2 when the change in the variable parameter tends to reduce the efficiency of the gearbox 3 and to decrease, for example proportionally to the increase in the efficiency of the gearbox 3, the electrical energy supplied to the motor 2 when the change in the variable parameter tends to increase the efficiency of the gearbox 3.
- variable parameter related to the efficiency of the reducer 3 can be estimated or measured.
- the controller 4 may comprise tables and / or laws in memory making it possible to associate electrical energy to be supplied to the motor 2 as a function of the efficiency of the gearbox 3.
- variable parameter that can vary the efficiency of the reducer 3 can be:
- the scanning frequency setpoint B can affect the efficiency of the gearbox
- the instantaneous speed of rotation of the motor V depends on the scanning frequency.
- the instantaneous speed of the motor can affect the efficiency of the gearbox 3.
- the efficiency of the gearbox 3 is better when the instantaneous speed increases. An example is thus illustrated in FIG. 4.
- FIG. 4 shows two curves C A and C B of efficiency of the gearbox 3 as a function of the instantaneous speed in rpm.
- the curve C A round
- the curve C B cross
- the effects of speed on the efficiency of the gearbox 3 are greater at low speed (towards the origin 0) and in one direction, for example amount (curve C B ).
- the efficiency of the gearbox 3 can vary between 1 and 50% for an instantaneous speed varying between a value almost zero and the maximum speed.
- the instantaneous speed of rotation of the motor V can be obtained by means of an angular position sensor.
- the tables and / or laws stored in memory can make it possible to determine the increase in electrical energy to be taken into account because of the reduction in efficiency of the gearbox 3 for low speeds, in addition to the electrical energy to be supplied for to reach a scanning frequency reference B.
- the scanning direction can also affect the efficiency of the gearbox 3.
- FIG. 4 An example is shown in Figure 4.
- the curve C A (round) shows the effectiveness of the gearbox 3 in one direction, for example downward, and the curve C B (cross) shows the effectiveness of the gearbox 3 in the other meaning. It can be seen from this figure that for the same instantaneous speed of rotation of the motor (dotted vertical line), the efficiency of the gearbox 3 is lower in one direction than in the other. A variation of between 5 and 25% of the efficiency of the reducing agent 3 can be observed. This variation is not proportional with the increase of the speed but decreases with the increase of the instantaneous speed of the engine 2.
- the information of the scanning direction M may already be available by the controller 4 to control the scanning movement of the brushes 5, 6. It can be determined by a angular position sensor 10 of the windscreen wiper 5, 6. Thus, in addition to making it possible to control an alternating scanning, the information provided by the angular position sensor 10 can also enable the control of the electrical energy to be supplied. to the engine 2.
- the increase in electrical energy to be taken into account due to the reduction in efficiency of the gearbox 3 in one direction with respect to the other direction can be determined from tables and / or laws stored in memory.
- the temperature T of the gearbox 3 can also affect the efficiency of the gearbox 3.
- the rotary transfer member 9 may be more or less rigid depending on the temperature. As can be seen in FIG. 5, the temperature drop of the gearbox 3 tends to increase the efficiency of the gearbox. Indeed, the hot teeth of a gearbox 3 tend to absorb the force by deforming, which degrades the efficiency performance of the gearbox 3.
- the temperature of the reducer 3 can be measured between -40 ⁇ and +1 15 ⁇ . To compensate for the reduction in efficiency of the gear unit 3 with the increase in temperature, it is therefore possible to increase by a determined value in relation with the reduction in the efficiency of the gear unit 3 the electrical energy supplied to the motor 2 when the The temperature of the gearbox 3 increases and decreases by a determined value in relation with the increase in the efficiency of the gearbox 3 the electrical energy supplied to the motor 2 when the temperature of the gearbox 3 decreases.
- the influence of the temperature is greater when the rotary transfer member 9 of the gearbox 2 and the worm 8 have different constituent materials, and more particularly when the rotary transfer member 9 is made of plastic material and the screw Endless 8 in metallic material.
- the temperature T of the gearbox 3 can be estimated, for example from a mathematical model and from measurements provided by a temperature sensor 14 of the electronic card 15 including the pulse width modulator PWM, in particular arranged at near the reducer 3.
- the torque delivered by the engine CO can also affect the efficiency of the gearbox 3. In fact, the more the torque delivered to the CO motor increases and the efficiency of the gearbox 3 decreases.
- To compensate for the reduction in efficiency of the gearbox 3 with the increase of the torque CO it is possible to increase by a determined value in relation with the reduction of the efficiency of the gearbox 3, the electrical energy supplied to the motor 2 when the torque CO increases and decreases by a determined value in relation to the increase in the efficiency of the gearbox 3, the electrical energy supplied to the motor 2 when the torque CO decreases.
- the information of the value of the torque delivered by the engine can be estimated, for example from a mathematical model or predefined tables.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Electric Motors In General (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1656813A FR3053944B1 (fr) | 2016-07-18 | 2016-07-18 | Unite d’essuyage pour vehicule automobile et procede de commande |
| PCT/EP2017/064154 WO2018015067A1 (fr) | 2016-07-18 | 2017-06-09 | Unite d'essuyage pour vehicule automobile et procede de commande |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3484754A1 true EP3484754A1 (fr) | 2019-05-22 |
Family
ID=57209540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17727933.8A Withdrawn EP3484754A1 (fr) | 2016-07-18 | 2017-06-09 | Unite d'essuyage pour vehicule automobile et procede de commande |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20190232920A1 (fr) |
| EP (1) | EP3484754A1 (fr) |
| JP (1) | JP2019527163A (fr) |
| CN (1) | CN109661333A (fr) |
| FR (1) | FR3053944B1 (fr) |
| WO (1) | WO2018015067A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024201828A1 (de) | 2024-02-28 | 2025-08-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Scheibenwischeranordnung und Verfahren zum Prüfen einer Funktionsfähigkeit einer Scheibenwischeranordnung eines Fortbewegungsmittels |
| CN118627854A (zh) * | 2024-08-09 | 2024-09-10 | 南京元五科技有限公司 | 一种智能化的订单柔性加工排产管理方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6281649B1 (en) * | 1997-01-03 | 2001-08-28 | Mccord Winn Textron Inc. | Windshield wiper system |
| EP1485636B1 (fr) * | 2002-03-13 | 2009-04-22 | Robert Bosch Gmbh | Mecanisme de commande |
| BRPI0814351B1 (pt) * | 2007-07-24 | 2019-06-04 | Mitsuba Corporation | Motor com mecanismo de engrenagem de redução |
| DE102008001816A1 (de) * | 2008-05-16 | 2009-11-19 | Robert Bosch Gmbh | Scheibenwischereinrichtung mit einer Steuerungseinrichtung zum Steuern der Enegieaufnahme einer Antriebsvorrichtung der Scheibenwischereinrichtung |
| FR2957574B1 (fr) * | 2010-03-16 | 2012-03-16 | Valeo Systemes Dessuyage | Commande d'un systeme de lave-vitre associe a un systeme d'essuyage pour vehicule automobile |
| DE102010039107A1 (de) * | 2010-08-10 | 2012-02-16 | Robert Bosch Gmbh | Wischersteuerung |
| EP2524845B1 (fr) * | 2011-05-20 | 2014-07-09 | Valeo Systèmes D'Essuyage | Procédé et dispositif pour contrôler la consommation électrique d'une unité d'essuie-glace |
| JP2013023176A (ja) * | 2011-07-26 | 2013-02-04 | Mitsuba Corp | モータ制御装置 |
| WO2014010616A1 (fr) * | 2012-07-12 | 2014-01-16 | 株式会社ミツバ | Procédé de commande d'essuie-glace et dispositif de commande d'essuie-glace |
| JP5940408B2 (ja) * | 2012-08-03 | 2016-06-29 | アスモ株式会社 | ワイパ装置 |
-
2016
- 2016-07-18 FR FR1656813A patent/FR3053944B1/fr not_active Expired - Fee Related
-
2017
- 2017-06-09 JP JP2019502225A patent/JP2019527163A/ja not_active Withdrawn
- 2017-06-09 EP EP17727933.8A patent/EP3484754A1/fr not_active Withdrawn
- 2017-06-09 US US16/317,980 patent/US20190232920A1/en not_active Abandoned
- 2017-06-09 WO PCT/EP2017/064154 patent/WO2018015067A1/fr not_active Ceased
- 2017-06-09 CN CN201780044413.1A patent/CN109661333A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3053944B1 (fr) | 2018-07-20 |
| JP2019527163A (ja) | 2019-09-26 |
| CN109661333A (zh) | 2019-04-19 |
| US20190232920A1 (en) | 2019-08-01 |
| WO2018015067A1 (fr) | 2018-01-25 |
| FR3053944A1 (fr) | 2018-01-19 |
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