JP6719927B2 - Wiper system - Google Patents

Description

The present invention relates to a vehicle wiper system, and more particularly to a wiper system for synchronously controlling the operations of a front wiper and a rear wiper in a vehicle equipped with a rear wiper.

Generally, in a vehicle wiper system mounted on an automobile or the like, a wiper blade arranged on a wiping surface is operated by an electric motor. For example, in a front wiper for an automobile, a configuration is widely used in which one electric motor+link mechanism operates two wiper blades on a driver side (DR side) and a passenger side (AS side) in synchronization. .. Further, in recent automobiles, a wiper device is often attached to a rear window, and such a rear wiper is also driven by an electric motor.

In such a vehicle with a rear wiper, a vehicle-mounted upper electronic control unit (ECU: Electronic Control Unit) sends a drive signal to each drive circuit of the front wiper and the rear wiper based on the user's switch-on information, and The wiper device is operated by separate control. However, when the front wiper and the rear wiper are operated separately, the user may feel the visual stress due to the wipers moving separately and the auditory stress that the sounds during operation/reversal are individually heard. Therefore, as a means for improving it, a control mode for synchronizing the operations of the front wiper and the rear wiper has also been proposed. Patent Document 1 describes a wiper system that performs synchronous control of a front wiper and a rear wiper, in which an operation signal is transmitted from the wiper control unit to each of the front wiper and the rear wiper, and the wiping cycle of the rear wiper is changed. Is synchronized with.

DE10303998A1

However, in the case of synchronously controlling the front wiper and the rear wiper, it is necessary to provide the host ECU with control circuits for driving the front wiper and the rear wiper, respectively, and separate dedicated software for synchronous control is also required. Moreover, in order to synchronize both wipers, it is necessary to acquire the position information of each wiper, and after acquiring the wiper position information, the host ECU sends a control signal to the wiper motor based on the information. For this reason, the amount of calculation processing in the host ECU increases, the transmission path of the control signal becomes complicated and long, and the control load on the host ECU may increase.

On the other hand, in recent years, a control mode in which the rear wiper is operated in accordance with the situation of the vehicle, such as switching to the back gear, has been studied. However, even in this case, it is difficult to operate the rear wiper in time with the front wiper. In such a control mode, when controlling the rear wiper motor, a controller for synchronizing with the vehicle situation is required, but in many vehicles, the host ECU is responsible for this, and the host ECU obtains the switch information and the like. Then, the rear wiper motor is operated based on this. For this reason, the control mode in which the front wiper and the rear wiper are synchronously controlled while synchronizing with the vehicle situation has problems of software and control load as described above, and it has been difficult to realize with the current system.

An object of the present invention is to realize synchronous control of a front wiper and a rear wiper with a simple configuration without increasing the control load.

The wiper system of the present invention includes a first wiper blade that performs a reciprocating wiping operation between an upper reversal position and a lower reversal position set on a first wiping surface, and an upper reversal set on a second wiping surface. A second wiper blade for performing a reciprocating wiping operation between a position and a lower reversal position, a first motor for reciprocating the first wiper blade, and a reciprocating wiping operation for the second wiper blade. A wiper system having a second motor, wherein the wiper system includes a first motor drive circuit for driving the first motor, and a first wiper control section for controlling the first motor drive circuit. And a second motor drive circuit for driving the second motor connected to the second motor through a power supply line, and the second motor drive. a second wiper control unit for controlling the circuit, and a signal transmission unit for sending a control signal to the second motor drive circuit from the second wiper control unit, have a, and the first motor the wiper control device It is characterized by being integrally provided .

In the present invention, a first motor for driving a first motor in a wiper system having a first motor for operating a first wiper blade and a second motor for operating a second wiper blade is provided. A wiper control device including a motor drive circuit and a first wiper control unit that controls the first motor drive circuit, a second motor drive circuit that drives the second motor, and a second motor drive circuit that controls the second motor drive circuit. By providing the wiper control section, it is possible to drive the second motor in accordance with the control of the first motor without changing the configuration of the second motor. Further, it is possible to control the first and second wiper blades with a simple configuration without increasing the control load on the higher-level electronic control device.

In the wiper system, the first motor, the blade position detecting means for detecting a position of the first wiper blade is provided, wherein the first wiper control unit, said detected by blade position detecting means and the first wiper Based on the position information of the blade, sends a control signal for driving the first motor to the first motor drive circuit, the second wiper control unit, based on the position information of the first wiper blade, The second wiper blade may be operated in synchronization with the first wiper blade. In this case, the second wiper controller sends a control signal to the second motor drive circuit to operate the second wiper blade when the first wiper blade passes the upper reverse position or the lower reverse position. It may be done.

Further, the second wiper control unit may operate the second wiper blade in synchronization with the first wiper blade based on vehicle status information of a vehicle in which the wiper system is installed. In this case, the wiper control device is connected to an electronic control device arranged above the wiper control device via a signal line, and the second wiper control unit acquires the vehicle status information acquired from the electronic control device. Based on the above, the control signal for operating the second wiper blade in synchronization with the first wiper blade may be sent to the second motor drive circuit .

In the wiper system, the first wiping surface is a windshield of a vehicle, the second wiping surface is a rear glass of a vehicle, and the first wiper blade is a front wiper that performs a reciprocating wiping operation on the windshield. The second wiper blade is a rear wiper blade that performs a reciprocating wiping operation on the rear glass, and the first motor is a front wiper motor that reciprocally wipes the front wiper blade on the windshield. The second motor is a rear wiper motor that reciprocally wipes the rear wiper blade on the rear glass, and the electronic control device acquires the presence/absence of switching to a back gear as the vehicle status information. When the operation switch of the first wiper blade is ON and the switching to the back gear is performed, the second wiper control unit is configured to operate the second wiper blade regardless of the state of the operation switch of the second wiper blade. The motor may be driven to operate the second wiper blade. Further, the electronic control unit acquires the presence or absence of a brake operation as the vehicle status information, and the second wiper control unit determines that the brake is applied when the operation switches of the first wiper blade and the second wiper blade are ON. The second wiper blade may be operated in synchronization with the first wiper blade when is operated.

Further, in the wiper system, the second wiper control unit causes the second wiper blade to move the second wiper blade at the upper reverse position or the lower reverse position based on the position information of the first wiper blade. You may make it operate simultaneously. By adjusting the operation start timings of the first and second wiper blades, it is possible to reduce wiper noise and user stress.

In addition, in the wiper system, the first wiping surface is a windshield of the vehicle, the second wiping surface is a rear glass of the vehicle, and the first wiper blade performs a reciprocating wiping operation on the windshield. The second wiper blade is a rear wiper blade that performs a reciprocating wiping operation on the rear glass, and the first motor reciprocally wipes the front wiper blade on the front glass. The second motor may be a rear wiper motor that moves the rear wiper blade back and forth on the rear glass.

According to the wiper system of the present invention, the first motor is driven by the wiper system having the first motor for operating the first wiper blade and the second motor for operating the second wiper blade. By providing the wiper control device including the first motor drive circuit with the second motor drive circuit that drives the second motor, the second motor can be driven in accordance with the control of the first motor.

It is explanatory drawing which shows the structure of the wiper system which is one embodiment of this invention. It is a block diagram which shows the structure of the control system of the wiper system of FIG. It is a block diagram which shows the circuit structure of a controller. It is explanatory drawing which shows the synchronous operation condition of a front wiper and a rear wiper.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing a configuration of a wiper system which is an embodiment of the present invention. As shown in FIG. 1, the wiper system 1 includes a front wiper 11 and a rear wiper 12. Both the front wiper 11 and the rear wiper 12 are controlled by a controller 10 (wiper control device) arranged on the front wiper 11 side. The controller 10 is connected to a body control module (upper ECU: hereinafter abbreviated as BCM) 20 via a signal line 21. The operation of the rear wiper 12 is controlled under the BCM 20 according to the front wiper 11 and vehicle conditions (ON/OFF of the front wiper switch, back gear and brake operation states, etc.).

The front wiper 11 is a one-motor forward/reverse drive parallel wiping type wiper device, and includes driver seat side and passenger side wiper arms 2a and 2b. The wiper arm 2a and the wiper arm 2b are connected by a link mechanism 3. Wiper blades 4a and 4b for wiping the glass surface are attached to each wiper arm 2a and 2b. The wiper blades 4a, 4b are elastically contacted with the windshield (first wiping surface) 5 by a spring member or the like (not shown) provided inside the wiper arms 2a, 2b. The link mechanism 3 is connected to the motor unit 6, and the wiper blades 4 a and 4 b are driven by the motor unit 6. A controller 10 is integrally provided in the motor unit 6, and the front wiper motor 7 is controlled by the controller 10.

The motor unit 6 includes a front wiper motor (first motor) 7 and a speed reduction mechanism 8. The front wiper motor 7 side has a sensor 9a for detecting the relative position of the wiper blades 4a, 4b, and the deceleration mechanism 8 side has a sensor 9b for detecting the absolute position of the wiper blades 4a, 4b (for example, the lower inverted position). Each is provided. A pulse signal is emitted from the relative position detecting sensor 9a as the motor rotates. Further, the sensor 9b for detecting the absolute position issues a single-shot signal when the wiper blades 4a, 4b come to the downward reversal position. Both sensors 9a, 9b function as blade position detecting means, and the current positions of the wiper blades 4a, 4b are detected based on signals from both sensors 9a, 9b.

In the wiper system 1, a rear wiper 12 is provided in addition to the front wiper 11. The rear wiper 12 is arranged on a rear glass (second wiping surface) 13 at the rear of the vehicle, and includes a wiper arm 14 and a wiper blade (second wiper blade; rear wiper blade) 15. The wiper arm 14 and the wiper blade 15 are driven by a rear wiper motor (second motor) 17 that is rotationally driven in one direction via a link mechanism 16. The rear wiper motor 17 is connected to the controller 10 via the power supply line 30 , and is controlled by the same controller 10 together with the front wiper motor 7. Instead of the link mechanism 16 of the rear wiper 12, a crank mechanism, a swing mechanism using a sector gear, or the like may be built in the rear wiper motor 17 and driven.

FIG. 2 is a block diagram showing the configuration of the control system of the wiper system 1. As shown in FIGS. 1 and 2, the controller 10 of the wiper system 1 is connected to the BCM 20 via a signal line 21. Various vehicle status information such as ON/OFF states of various operation switches, positions of transmission gears, and brake operation states are input to the BCM 20. Here, the front wiper switch 22, the rear wiper switch 23, the front washer switch 24, the rear washer switch 25, the back gear 26, the brake 27, the vehicle speed sensor 28, etc. are connected, and the respective states and data are input in real time. It

The controller 10 disposed below the BCM 20 is provided with a CPU (microcomputer) 31, a front wiper motor drive circuit (first motor drive circuit) 32, and a rear wiper motor drive circuit (second motor drive circuit) 33. Has been. The front wiper motor drive circuit 32 is provided in the motor unit 6 and is connected to the front wiper motor 7. The rear wiper motor drive circuit 33 is connected to the rear wiper motor 17 via the power supply line 30 .

A signal transmission for transmitting a control signal from the front wiper control unit (first wiper control unit) 41, the rear wiper control unit (second wiper control unit) 42, and the rear wiper control unit 42 to the rear wiper motor drive circuit 33 in the CPU 31. A section 43 is provided. The CPU 31 sends a control signal from the front wiper control unit 41 to the front wiper motor drive circuit 32 based on the command from the BCM 20 and the vehicle status information, and the motor unit 6 drives the wiper arms 2a and 2b to operate appropriately. It Further, a control signal is transmitted from the rear wiper control unit 42 to the rear wiper motor drive circuit 33 via the signal transmission unit 43, and the motor unit 17 is driven, whereby the wiper arm 14 is appropriately operated. That is, in the wiper system 1, the controller 10 of the front wiper motor 7 is provided with not only the front wiper motor 7 but also the control function and drive function of the rear wiper motor 17.

FIG. 3 is a block diagram showing a circuit configuration of the controller 10. As shown in FIG. 3, the controller 10 includes a CPU 31 in which a control program is installed, a ROM 34 in which various control data is stored, a first drive circuit 35, a second drive circuit 36, and an FET module 37. It is provided. The CPU 31 calculates the position information (current position) of the wiper blades 4a and 4b based on the signal output from each sensor, and controls the forward/reverse rotation and the rotation speed of the front wiper motor 7 while referring to the control data in the ROM 34. To do. Further, the CPU 31 controls the rear wiper motor 17 in conjunction with the rear wiper switch 23, the back gear 26, and the brake 27 to operate the wiper blade 15 of the rear wiper 12 on the rear glass 13.

In the controller 10, as the FET module 37, a general-purpose FET module used for driving a three-phase brushless motor is used. Normally, the FET module for three-phase drive includes one FET for reverse connection prevention and two FETs for each phase drive × 3 in total, and here six FETs for each phase drive are included. Of these FETs, four are used to drive the front wiper motor 7 in the forward and reverse directions, and the remaining two are used to drive the rear wiper motor 17. As described above, in the controller 10, by diverting the general-purpose three-phase motor driving FET module, the controller is configured by the FET module in which the front wiper driving FET, the rear wiper driving FET, and the reverse connection protection FET are packaged in one package. be able to. This makes it possible to realize a compact controller that can control both the front wiper motor 7 and the rear wiper motor 17 without enlarging the drive circuit.

As shown in FIG. 3, the FET module 37 is divided into a battery reverse connection protection unit 38, a front wiper motor drive circuit 32, and a rear wiper motor drive circuit 33. The battery reverse connection protection unit 38 is provided with one FET 39a, the front wiper motor drive circuit 32 is provided with four FETs 39b to 39e, and the rear wiper motor drive circuit 33 is provided with two FETs 39f and 39g. In the front wiper motor drive circuit 32, the FETs 39b to 39e form a bridge circuit for driving the front wiper motor 7 in the forward and reverse directions. In the FET module 37, based on the position information of the wiper blades 4a and 4b, the CPU 31 (front wiper control unit 41) and the first and second drive circuits 35 and 36 appropriately turn on/off the FETs 39b to 39e, thereby turning on the front wiper motor 7. Forward/reverse operation is controlled. Further, the FETs 39f and 39g are appropriately turned on and off by the CPU 31 (rear wiper control unit 42) and the first and second drive circuits 35 and 36, and the operation of the rear wiper motor 17 is controlled.

In such a wiper system 1, as described above, the operation of the rear wiper 12 is controlled according to the operation of the front wiper 11 and the vehicle condition. Here, as an example thereof, an operation control mode of the rear wiper 12 in the following case will be described.
(1) Front wiper switch 22: ON, rear wiper switch 23: ON (2) Front wiper switch 22: ON, back gear 26: ON (3) Front wiper switch 22: ON, rear wiper switch 23: ON , Brake 27: When ON

(1) Front wiper switch 22: ON, rear wiper switch 23: ON
In this case, the rear wiper 12 operates in synchronization with the operation start of the front wiper 11. FIG. 4A is an explanatory diagram showing the operating states of the front wiper 11 and the rear wiper 12 in the case of (1). When both the front wiper switch 22 and the rear wiper switch 23 are turned on, the BCM 20 notifies the controller 10 to that effect, and the controller 10 having received this informs the front wiper 11 to operate the rear wiper 12.

As shown in FIG. 4A, at this time, the rear wiper 12 starts the wiping operation at the same time when the forward wipe of the front wiper 11 (lower inverted position→upward inverted position) starts. That is, the wiper blades 4a, 4b of the front wiper 11 and the wiper blade 15 of the rear wiper 12 simultaneously start to move from the lower inverted position. In the case of FIG. 4A, the wiping cycle of the rear wiper 12 is shorter than that of the front wiper 11, so the rear wiper 12 is in the lower reversal position after one wiping operation until the one wiping operation of the front wiper 11 is completed. And wait. Then, at the same time when the front wiper 11 is reversed, the rear wiper 12 starts the next wiping operation.

In this way, by adjusting the wiping timings of the front wiper 11 and the rear wiper 12, the wiper blades 4a and 4b and the wiper blade 15 start the forward movement operation at the same time. As a result, it is possible to reduce the visual stress on the user as compared with the operation mode in which the both operate separately. Further, since the reversing sound of the wiper blades 4a and 4b in the lower reversing position and the operation starting sound of the wiper blade 15 are generated at the same time, the auditory stress that the operation and reversing sounds are individually heard is reduced. .. Although the wiping cycle of the rear wiper 12 is usually shorter than that of the front wiper 11, when the wiping cycle of the rear wiper 12 is longer than that of the front wiper 11, as shown by the broken line in FIG. The operation of both wipers 11 and 12 is synchronized once in a plurality of wiping operations of the front wiper 11 (twice in FIG. 4A).

(2) Front wiper switch 22: ON, back gear 26: ON
When the BCM 20 detects that the transmission gear is in the back gear 26 when the front wiper switch 22 is ON, the BCM 20 notifies the controller 10 to that effect. The controller 10 which receives this operates the rear wiper 12 in synchronization with the front wiper 11 regardless of whether the rear wiper switch 23 is ON or OFF. In this case, the rear wiper 12 operates in synchronization with the start of movement of the front wiper 11 (same as in FIG. 4A), as in (1) above. As a result, when the vehicle is backed up in the case of rain or snow, the rear glass 13 is automatically wiped, and a clear rear view can be secured.

(3) Front wiper switch 22: ON, rear wiper switch 23: ON, brake 27: ON
In this case, it is assumed that the vehicle is stopped by a signal or the like when traveling in the rain or snow, and at that time, the user (driver) normally confirms the state of the following vehicle. That is, at this time, the driver confirms the rear side with the rearview mirror through the rear glass 13, but the frequent wiper wiping operation may rather obstruct the rear view. Therefore, in the wiper system 1, in the situation of (3), the number of operations of the rear wiper 12 is reduced and the operation is intermittent (FIG. 4B). That is, when the front wiper switch 22 and the rear wiper switch 23 are both ON, when the BCM 20 detects that the brake 27 is stepped on, the BCM 20 notifies the controller 10 of that fact, and the controller 10 receiving it notifies the controller 10 of the fact. The rear wiper 12 is operated synchronously (intermittently).

As described above, in the wiper system according to the present invention, the controller 10 is provided with the control drive function of the rear wiper motor 17, so that the front wiper can be operated only by the controller 10 without changing the configurations of the BCM 20 (upper ECU) and the rear wiper 12. 11 and the rear wiper 12 can be synchronously controlled. Further, in this case, the host ECU does not directly control the rear wiper 12, but notifies the controller 10 of the vehicle status, and the controller 10 controls the front wiper 11 and the rear wiper 12 appropriately based on the notification. The control load on the ECU does not increase. Therefore, the synchronous control of the front wiper and the rear wiper can be realized with a simple configuration without increasing the control load.

Furthermore, by matching the start of wiping of the front wiper 11 and the rear wiper 12 in the above-described manner, it is possible to reduce user stress and reduce wiper noise. In addition, the back gear information and the brake information are sent to the controller 10 by communication, and the controller 10 receiving the signal controls the rear wiper 12, so that the front and rear wipers suitable for the vehicle situation can be controlled without increasing the control load of the BCM 20. It becomes possible to realize a synchronous operation.

It is needless to say that the present invention is not limited to the above-mentioned embodiment and can be variously modified without departing from the gist thereof.
For example, the vehicle status information input to the BCM 20 is not limited to that described above, and the synchronization control mode is not limited to the above (1) to (3). For example, in the above-described embodiment, the control mode in which the operation timing from the lower reversal position is synchronized is shown. However, when the stop position of the rear wiper is the upper reversal position, the control mode in which the operation timing from the upper reversal position is synchronized It is also possible to Further, for example, the link mechanism 16 of the rear wiper 12 of FIG. 1 can be built in the rear wiper motor 17.

In addition, in the above-described embodiment, an example in which the present invention is applied to the parallel wipe type front wiper 11 of the one-motor forward/reverse drive is shown, but the form of the front wiper is not limited to this, and the two-motor forward/reverse drive is used. The present invention can also be applied to other forms of wiper systems such as a counter wipe type wiper system and a two-motor forward/reverse drive parallel wipe type. Further, the mechanical configuration of the wiper system is not limited to that described above, and the present invention is also applicable to, for example, a wiper system having a configuration in which a wiper arm is attached to an output shaft of a wiper motor without a link mechanism. is there. In addition, the front wiper motor 7 and the rear wiper motor 17 may be brushed motors or brushless motors.

1 wiper system 2a, 2b wiper arm 3 link mechanism 4a, 4b wiper blade (first wiper blade)
5 Windshield (first wiping surface)
6 Motor unit 7 Front wiper motor (1st motor)
8 Reduction mechanism 9a, 9b Sensor 10 Controller 11 Front wiper 12 Rear wiper 13 Rear glass (second wiping surface)
14 Wiper arm 15 Wiper blade (second wiper blade)
16 link mechanism 17 rear wiper motor (second motor)
20 Body Control Module 21 Signal Line 22 Front Wiper Switch 23 Rear Wiper Switch 24 Front Washer Switch 25 Rear Washer Switch 26 Back Gear 27 Brake 28 Vehicle Speed Sensor
30 power supply line 31 CPU
32 Front wiper motor drive circuit (first motor drive circuit)
33 Rear wiper motor drive circuit (second motor drive circuit)
34 ROM
35 1st drive circuit 36 2nd drive circuit 37 FET module 38 Battery reverse connection protection parts 39a-39g FET
41 Front wiper controller (first wiper controller)
42 Rear wiper controller (second wiper controller)
43 Signal transmitter

Claims (9)

A first wiper blade that performs a reciprocating wiping operation between an upper reversal position and a lower reversal position set on the first wiping surface;
A second wiper blade that performs a reciprocating wiping operation between an upper reversal position and a lower reversal position set on the second wiping surface;
A first motor for reciprocating and wiping the first wiper blade;
A second motor for moving the second wiper blade back and forth.
The wiper system includes a wiper control device including a first motor drive circuit for driving the first motor, and a first wiper control section for controlling the first motor drive circuit,
The wiper control device includes a second motor drive circuit for driving the second motor, which is connected to the second motor via a power supply line, and a second wiper control section for controlling the second motor drive circuit. When, a signal transmission unit which sends a control signal to said second motor drive circuit from the second wiper control unit, was perforated,
The wiper system, wherein the first motor and the wiper control device are integrally provided . The wiper system according to claim 1 ,
The first motor has blade position detection means for detecting the position of the first wiper blade,
The first wiper control section sends a control signal for driving the first motor to a first motor drive circuit based on the position information of the first wiper blade detected by the blade position detection means. Then
The wiper system, wherein the second wiper control unit operates the second wiper blade in synchronization with the first wiper blade based on the position information of the first wiper blade. The wiper system according to claim 2 ,
The second wiper control unit may send a control signal to the second motor drive circuit to operate the second wiper blade when the first wiper blade passes the upper reversal position or the lower reversal position. Characteristic wiper system. The wiper system according to any one of claims 1 to 5 ,
The said 2nd wiper control part operates the said 2nd wiper blade synchronizing with the said 1st wiper blade based on the vehicle condition information of the vehicle in which the said wiper system was mounted, The wiper system characterized by the above-mentioned. The wiper system according to claim 4 ,
The wiper control device is connected via a signal line to an electronic control device arranged above the wiper control device,
The second wiper control unit sends a control signal for operating the second wiper blade in synchronization with the first wiper blade to the second motor drive circuit based on the vehicle status information acquired from the electronic control device. A wiper system characterized by that. The wiper system according to claim 4 or 5 ,
The first wiping surface is a windshield of the vehicle, the second wiping surface is a rear glass of the vehicle,
The first wiper blade is a front wiper blade that performs a reciprocating wiping operation on the windshield, and the second wiper blade is a rear wiper blade that performs a reciprocating wiping operation on the rear glass,
The first motor is a front wiper motor that reciprocally wipes the front wiper blade on the windshield, and the second motor is a rear wiper motor that reciprocally wipes the rear wiper blade on the rear glass. ,
The electronic control device, as the vehicle status information, acquires the presence or absence of switching to the back gear,
When the operation switch of the first wiper blade is ON and the switching to the back gear is performed, the second wiper control unit is configured to operate the second wiper blade regardless of the state of the operation switch of the second wiper blade. A wiper system characterized by driving a motor to operate the second wiper blade. The wiper system according to claim 4 or 5 ,
The electronic control device, as the vehicle status information, acquires the presence or absence of a brake operation,
The second wiper control unit synchronizes the second wiper blade with the first wiper blade when the operation switches of the first wiper blade and the second wiper blade are ON and the brake is operated. A wiper system characterized by being activated. The wiper system according to any one of claims 2 to 7 ,
The second wiper control unit operates the second wiper blade at the same time as the first wiper blade at the upper reversal position or the lower reversal position based on the position information of the first wiper blade. And wiper system. The wiper system according to any one of claims 1 to 9 ,
The first wiping surface is a windshield of the vehicle, the second wiping surface is a rear glass of the vehicle,
The first wiper blade is a front wiper blade that performs a reciprocating wiping operation on the windshield, and the second wiper blade is a rear wiper blade that performs a reciprocating wiping operation on the rear glass,
The first motor is a front wiper motor that reciprocally wipes the front wiper blade on the windshield, and the second motor is a rear wiper motor that reciprocally wipes the rear wiper blade on the rear glass. A wiper system characterized by that.

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