WO2018079248A1

WO2018079248A1 - Vehicular wiper device and method for controlling vehicular wiper device

Info

Publication number: WO2018079248A1
Application number: PCT/JP2017/036676
Authority: WO
Inventors: 典弘杉本; 岡田　真一; 義久伴野
Original assignee: 株式会社デンソー
Priority date: 2016-10-24
Filing date: 2017-10-10
Publication date: 2018-05-03
Also published as: JP2018069760A

Abstract

Provided is a vehicular wiper device equipped with: a first motor which, by rotation of a first output shaft, causes a wiper blade connected to the leading end of a wiper arm to perform a wiping action between two different reversal positions on a windshield; a second motor which, by rotation of a second output shaft in synchronization with the rotation of the first motor, actuates an extending/contracting mechanism provided to the wiper arm so as to allow the wiping range of the wiper blade on the windshield to vary; and a control unit which controls the first and second motors such that the wiping range along the outward path is smaller than the wiping range along the return path.

Description

WIPER WIPER DEVICE AND CONTROL METHOD FOR VEHICLE WIPER DEVICE

The present disclosure relates to a vehicle wiper device that can expand a wiping range, and a control method for the vehicle wiper device.

As shown in FIG. 18A, the wiper device for wiping the windshield glass of an automobile has

wiper arms

150D and 150P with

wiper blades

154D and 154P connected to the front end portions thereof, and a wiper motor and lower inversion positions P4D and P4P. The reciprocation is performed between the reversal positions P3D and P3P. In many cases, the trajectories of the operations of the

wiper arms

150D and 150P are substantially arc-shaped around the

pivot shafts

152D and 152P of the

wiper arms

150D and 150P. Accordingly, the

wiping ranges

156D and 156P, which are areas where the

wiper blades

154D and 154P wipe the windshield glass 1 and the like, have a substantially fan shape centered on the

pivot shafts

152D and 152P.

JP 2014-83993 A and JP 2012-224231 A disclose wiper devices that wipe the substantially fan-

shaped wiping ranges

156D and 156P.

The car windshield glass 1 has a substantially isosceles trapezoidal shape. Therefore, in the parallel (tandem) type wiper device in which the two

wiper arms

150D and 150P disclosed in JP 2014-83993 A and 2 simultaneously rotate in the same direction, the

pivot shafts

152D and 152P are connected to the windshield glass 1. The upper reversal position P3D of the wiper blade 154D on the driver's seat side is close to the leg (vertical side of the isosceles trapezoidal shape) 1B of the windshield glass 1 having a substantially isosceles trapezoid shape. In parallel with the leg in position.

The upper reversal position P3P of the wiper blade 154P on the passenger seat side of the wiper device disclosed in JP 2014-83993A and JP 2012-224231 also preferentially wipes the windshield glass 1 on the driver seat side. Therefore, the windshield glass 1 is provided in parallel with the leg 1B on the driver's seat side.

However, as described above, the wiping range of the wiper blade 154P has a substantially fan shape. Therefore, when the upper inversion position P3P is provided at the above-described position, the upper corner 1C of the windshield glass 1 on the passenger seat side is the center. A non-wiping range 158 that is not wiped by the wiper blade 154P is generated.

In the non-wiping range 158, water droplets are likely to gather when the wiper blade 154P is wiped from the lower inversion position P4P to the upper inversion position P3P. Water droplets collected in the non-wiping range 158 flow down to the wiping range 156P. When the wiper blade 154P wipes from the upper reverse position P3P to the lower reverse position P4P, water droplets are removed from the wiping range 156P by the wiper blade 154P. However, as shown in FIG. 18B, some of the removed water droplets become splashes 160 and scatter outside the passenger seat of the windshield glass 1. In this case, pedestrians who are present, occupants of motorcycles, etc. are exposed to the splashes.

The present disclosure provides a vehicle wiper device and a vehicle wiper device control method for preventing water droplets from being scattered to a pedestrian or the like.

A first aspect of the present disclosure is a vehicle wiper device in which a wiper blade connected to a tip portion of a wiper arm is rotated between two different inversion positions on a windshield by rotation of a first output shaft. A second driving shaft and a second output shaft synchronized with the driving of the first driving source to operate a telescopic mechanism provided on the wiper arm to vary a wiping range of the windshield by the wiper blade; A driving source; and a control unit that controls the first driving source and the second driving source so that a wiping range at the time of backward wiping is smaller than a wiping range at the time of wiping forward.

The vehicle wiper device according to the first aspect controls the drive of the second drive source in synchronization with the drive of the first drive source. By such control, the telescopic mechanism is operated, the wiping range of the windshield by the wiper blade is variable (enlarged), and the wiping range on the passenger seat side of the windshield is expanded. The vehicular wiper device according to the first aspect is more effective at the time of return wiping when the wiper blade moves from the upper inversion position to the lower inversion position than the wiping range at the time of forward wiping in which the wiper blade moves from the lower inversion position to the upper inversion position. By reducing the wiping range, it is possible to prevent water droplets from being scattered to pedestrians and the like by suppressing the water droplets from flying to the side of the vehicle.

According to a second aspect of the present disclosure, in the above aspect, the control unit determines an enlargement ratio of each of the expansion / contraction mechanisms at the time of the forward path wiping and the return path wiping, and operates at an expansion ratio determined by the expansion / contraction mechanism. Thus, the first drive source and the second drive source may be controlled.

The vehicular wiper device according to the second aspect determines the expansion ratio of each of the expansion and contraction mechanisms at the time of outward wiping and at the time of backward wiping according to the degree of water droplets scattered at the time of outward wiping. By controlling the first drive source and the second drive source so that the expansion / contraction mechanism operates at such an enlargement ratio, the vehicle wiper device of the second aspect can prevent water droplets from scattering to pedestrians and the like.

According to a third aspect of the present disclosure, in the above aspect, the vehicle speed information detection unit further acquires vehicle speed information, and the control unit is based on the speed information detected by the vehicle speed information detection unit. You may determine the expansion rate at the time of the said outward wiping, and the expansion rate at the time of the said return wiping.

The vehicle wiper device according to the third aspect controls the first drive source and the second drive source so that the expansion / contraction mechanism operates at an enlargement ratio determined according to the speed information of the vehicle. Water droplets can be prevented from scattering.

According to a fourth aspect of the present disclosure, in the third aspect, when the vehicle decelerates based on speed information detected by the vehicle speed information detection unit, the control unit You may make the expansion rate at the time of the said return path wiping small with respect to an expansion rate.

According to the vehicle wiper device of the fourth aspect, when the vehicle decelerates, the amount of water drops on the windshield and the vehicle roof flowing down to the windshield becomes significant. In addition, by reducing the enlargement rate at the time of wiping the return path, it is possible to prevent water droplets from being scattered to pedestrians.

According to a fifth aspect of the present disclosure, in the third and fourth aspects, the control unit is configured to wipe the outward path as the vehicle speed decreases based on the speed information detected by the vehicle speed information detection unit. You may make small the expansion rate at the time of the said return path wiping with respect to the expansion rate of time.

If the vehicle speed is high, water droplets on the windshield are blown backward by the traveling wind, but if the vehicle speed is low, the water droplets blown backward by the traveling wind are reduced. Accordingly, the vehicle wiper device according to the fifth aspect prevents the water droplets from being scattered to pedestrians and the like by reducing the enlargement rate at the time of the backward wiping with respect to the enlargement rate at the time of the outward wiping as the vehicle speed is lower. it can.

According to a sixth aspect of the present disclosure, in the first and second aspects, the sixth aspect further includes a first rotation angle detection unit that detects a rotation angle of the first output shaft, and the control unit includes the first rotation angle. The enlargement rate at the time of the forward pass wiping and the enlargement rate at the time of the return pass wiping may be determined according to the rotation speed of the first output shaft calculated based on the rotation angle detected by the detection unit.

According to the sixth aspect of the vehicle wiper device, the pedestrian is controlled by controlling the first drive source and the second drive source so that the expansion / contraction mechanism operates at an enlargement ratio determined according to the rotation speed of the first output shaft. It is possible to prevent water droplets from being scattered on the surface.

According to a seventh aspect of the present disclosure, in the sixth aspect, the control unit increases the enlargement rate during the return pass wiping with respect to the enlargement rate during the forward pass wiping as the rotational speed of the first output shaft increases. It may be small.

If the wiping speed of the wiper blade, that is, the rotational speed of the first output shaft of the first drive source is high, the splash of water droplets on the side surface of the vehicle becomes remarkable. Therefore, the vehicular wiper device according to the seventh aspect can be used for a pedestrian or the like by reducing the enlargement ratio at the time of the backward wiping with respect to the enlargement ratio at the time of the outward wiping as the rotation speed of the first output shaft is larger. Can prevent water droplets from splashing.

According to an eighth aspect of the present disclosure, in the first and second aspects, the eighth aspect of the present disclosure further includes a water droplet detection unit that detects water droplets attached to the windshield, and the control unit is based on a detection result of the water droplet detection unit. Depending on the amount of water on the windshield calculated as described above, the enlargement rate at the time of the forward wiping and the enlargement rate at the time of the return wiping may be determined.

The vehicle wiper device according to the eighth aspect controls the first drive source and the second drive source so that the telescopic mechanism operates at an enlargement ratio determined according to the amount of water on the windshield, thereby enabling a pedestrian or the like to Can prevent water droplets from splashing.

In a ninth aspect of the present disclosure, in the eighth aspect, the control unit may reduce the enlargement ratio at the time of the return path wiping with respect to the enlargement ratio at the time of the outward wiping as the amount of water increases.

¡The more water on the windshield, the more water droplets are scattered on the side of the vehicle. Therefore, the vehicular wiper device according to the ninth aspect can prevent water droplets from being scattered to pedestrians and the like by reducing the enlargement rate during the return pass wiping with respect to the enlargement rate during the outward pass wiping as the amount of water increases.

A tenth aspect of the present disclosure further includes an in-vehicle sensor that detects a pedestrian and a two-wheeled vehicle in the above-described aspect, and the control unit detects the pedestrian or the two-wheeled vehicle by the in-vehicle sensor and The enlargement rate may be made smaller than the enlargement rate at the time of wiping the outward path.

When the vehicle wiper device according to the tenth aspect detects a pedestrian or the like by a vehicle-mounted sensor, it reduces the enlargement rate at the time of wiping the return path with respect to the enlargement rate at the time of the outward wiping, thereby Spattering can be prevented.

An eleventh aspect of the present disclosure is a method for controlling a vehicle wiper device, wherein two different wiper blades connected to the tip of a wiper arm by rotation of a first output shaft of a first drive source are arranged on a windshield. A first driving source actuating step for performing a wiping operation between the reversing positions; and a telescopic mechanism provided on the wiper arm by actuating the second output shaft of the second driving source synchronized with the driving of the first driving source. A second driving source actuating step for changing the wiping range of the windshield by the wiper blade; and the first driving source and the second driving source so that the wiping range at the time of the return pass wiping is smaller than the wiping range at the time of the forward pass wiping. And a control step for controlling.

The control method of the vehicle wiper device according to the eleventh aspect controls the driving of the second driving source in synchronization with the driving of the first driving source. By such control, the telescopic mechanism is operated, the wiping range of the windshield by the wiper blade is variable (enlarged), and the wiping range on the passenger seat side of the windshield is expanded. The control method of the vehicle wiper device according to the eleventh aspect is such that the wiper blade moves from the upper reversal position to the lower reversal position than the wiping range at the time of forward wiping when the wiper blade moves from the lower reversal position to the upper reversal position. By reducing the wiping range at the time of wiping, it is possible to prevent water droplets from being scattered to pedestrians and the like by suppressing the water droplets from flying to the side of the vehicle.

According to a twelfth aspect of the present disclosure, in the eleventh aspect, in the eleventh aspect, the control step determines an enlargement ratio of each of the expansion / contraction mechanisms at the time of the forward wiping and the return wiping, and the expansion mechanism determines The first drive source and the second drive source may be controlled to operate at a rate.

According to the control method of the vehicle wiper device of the twelfth aspect, the enlargement ratio of each of the expansion and contraction mechanisms at the time of the forward wiping and at the time of the backward wiping is determined according to the degree of the water droplets scattered at the time of the forward wiping. The vehicle wiper device according to the twelfth aspect controls the first drive source and the second drive source so that the expansion / contraction mechanism operates at such an enlargement ratio, thereby preventing water droplets from scattering to pedestrians and the like. it can.

According to a thirteenth aspect of the present disclosure, in the eleventh and twelfth aspects, the control step is based on speed information detected by a vehicle speed information detection unit that acquires vehicle speed information. And an enlargement rate at the time of wiping the return pass may be determined.

According to a thirteenth aspect of the vehicle wiper device control method, the pedestrian is controlled by controlling the first drive source and the second drive source so that the expansion / contraction mechanism operates at an enlargement ratio determined according to vehicle speed information. It is possible to prevent water droplets from being scattered on the surface.

According to a fourteenth aspect of the present disclosure, in the thirteenth aspect, in the thirteenth aspect, when the vehicle decelerates based on speed information detected by the vehicle speed information detection unit, You may make the expansion rate at the time of the said return path wiping small with respect to an expansion rate.

When the vehicle decelerates, the amount of water drops on the windshield and the vehicle roof flowing down to the windshield becomes significant. Therefore, the control method for the vehicle wiper device according to the fourteenth aspect is In addition, by reducing the enlargement rate at the time of wiping the return path, it is possible to prevent water droplets from being scattered to pedestrians.

According to a fifteenth aspect of the present disclosure, in the thirteenth and fourteenth aspects, the control step is configured such that, based on the speed information detected by the vehicle speed information detection unit, the forward wiping is performed as the vehicle speed decreases. You may make small the expansion rate at the time of the said return path wiping with respect to the expansion rate of time.

If the vehicle speed is high, water droplets on the windshield are blown backward by the traveling wind, but if the vehicle speed is low, the water droplets blown backward by the traveling wind are reduced. Therefore, according to the control method of the vehicle wiper device of the fifteenth aspect, the lower the speed of the vehicle, the smaller the enlargement rate at the time of the backward wiping relative to the enlargement rate at the time of the outward wiping, so Spattering can be prevented.

According to a sixteenth aspect of the present disclosure, in the eleventh and twelfth aspects, the control step includes calculating the first output calculated based on a rotation angle of the first output shaft detected by a first rotation angle detection unit. Depending on the rotational speed of the shaft, the enlargement rate at the time of the forward pass wiping and the enlargement rate at the time of the return pass wiping may be determined.

According to the control method for a vehicle wiper device of the sixteenth aspect, the first drive source and the second drive source are controlled so that the expansion / contraction mechanism operates at an enlargement ratio determined according to the rotation speed of the first output shaft. As a result, water droplets can be prevented from scattering to pedestrians and the like.

According to a seventeenth aspect of the present disclosure, in the sixteenth aspect, in the sixteenth aspect, as the rotational speed of the first output shaft increases, the control step sets an enlargement ratio during the return path wiping with respect to an enlargement ratio during the forward path wiping. It may be small.

If the wiping speed of the wiper blade, that is, the rotational speed of the first output shaft of the first drive source is high, the splash of water droplets on the side surface of the vehicle becomes remarkable. Therefore, according to the control method of the vehicle wiper device of the seventeenth aspect, the larger the rotation speed of the first output shaft is, the smaller the enlargement ratio at the time of the return pass wiping is made smaller than the enlargement ratio at the time of the forward pass wiping. It is possible to prevent water droplets from splashing on the person.

According to an eighteenth aspect of the present disclosure, in the eleventh and twelfth aspects, the control step includes a step of: calculating on the windshield calculated based on a detection result of a water droplet detection unit that detects a water droplet adhering to the windshield. Depending on the amount of water, the enlargement rate at the time of the forward wiping and the enlargement rate at the time of the return wiping may be determined.

According to the control method of the vehicle wiper device of the eighteenth aspect, by controlling the first drive source and the second drive source so that the expansion / contraction mechanism operates at an enlargement ratio determined according to the amount of water on the windshield. Water droplets can be prevented from scattering to pedestrians.

In the nineteenth aspect of the present disclosure, in the eighteenth aspect, the control step may reduce the enlargement rate at the return pass wiping with respect to the enlargement rate at the outward pass wiping as the amount of water increases.

¡The more water on the windshield, the more water droplets are scattered on the side of the vehicle. Therefore, the control method of the vehicle wiper device according to the nineteenth aspect reduces the amount of water droplets scattered to pedestrians and the like by reducing the enlargement rate at the time of wiping the return path with respect to the enlargement rate at the time of the outward wiping as the amount of water increases. Can be prevented.

According to a twentieth aspect of the present disclosure, in the eleventh to nineteenth aspects described above, when the control step detects a pedestrian or a two-wheeled vehicle using an on-vehicle sensor, the enlargement ratio at the time of the return path wiping is increased by the enlargement ratio at the time of the outward wiping. It may be smaller than the rate.

According to the control method for a vehicle wiper device of the twentieth aspect, when a pedestrian or the like is detected by a vehicle-mounted sensor, the walking rate is reduced by reducing the enlargement rate at the time of the return pass wiping with respect to the enlargement rate at the time of the outward pass wiping. It is possible to prevent water droplets from splashing on the person.

1 is a schematic diagram illustrating an example of a vehicle wiper system including a vehicle wiper device according to a first exemplary embodiment of the present disclosure. It is a top view in the stop state of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. FIG. 3 is a cross-sectional view of the second holder member along the line AA in FIG. 2. It is a top view in operation of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. It is a top view in operation of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. It is a top view in operation of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. It is a top view in operation of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. It is a top view in operation of the wiper device for vehicles concerning a 1st exemplary embodiment of this indication. FIG. 3 is a circuit diagram schematically illustrating a circuit of a wiper system according to a first exemplary embodiment of the present disclosure. It is explanatory drawing which showed an example of the 2nd output shaft rotation angle map which prescribed | regulated the rotation angle of the 2nd output shaft according to the rotation angle of the 1st output shaft in 1st Embodiment of this indication. It is explanatory drawing which showed the example matched with the case where an enlargement rate is small with the difference with respect to the 2nd output shaft rotation angle map when an enlargement rate is large. It is explanatory drawing which showed an example of the change of the wiping range according to the expansion rate of the wiper apparatus for vehicles which concerns on 1st exemplary embodiment of this indication. 6 is a flowchart illustrating an example of water droplet scattering prevention processing in the wiper system according to the first exemplary embodiment of the present disclosure. It is explanatory drawing which showed an example of the 2nd output shaft rotation angle map which prescribed | regulated the rotation angle of the 2nd output shaft according to the rotation angle of the 1st output shaft in 2nd exemplary embodiment of this indication. It is explanatory drawing which showed an example of the change of the wiping range according to the expansion rate of the wiper apparatus for vehicles which concerns on 2nd exemplary embodiment of this indication. 12 is a flowchart illustrating an example of water droplet scattering prevention processing in the wiper system according to the second exemplary embodiment of the present disclosure. 12 is a flowchart illustrating an example of water droplet scattering prevention processing in a wiper system according to a third exemplary embodiment of the present disclosure. It is the flowchart which showed an example of the water droplet scattering prevention process in the wiper system which concerns on 4th exemplary embodiment of this indication. It is the schematic which showed an example of the wiper apparatus which does not expand the wiping range. It is explanatory drawing which showed that one part of the wiped-off water droplet was splashed and scattered on the passenger seat outer side of a windshield glass.

[First exemplary embodiment]
FIG. 1 is a schematic diagram illustrating an example of a wiper system 100 including a vehicle wiper device (hereinafter referred to as “wiper device”) 2 according to a first exemplary embodiment of the present disclosure. A wiper system 100 shown in FIG. 1 is for wiping a windshield glass 1 as a “windshield” provided in a vehicle such as a passenger car, for example, and includes a pair of wiper arms (driver seat side wiper arms described later). 17 and the passenger seat side wiper arm 35), the first motor 11, the second motor 12, the control circuit 52, the drive circuit 56, and the washer device 70.

Since FIG. 1 shows the case of a right-hand drive vehicle, the right side of the vehicle (left side of FIG. 1) is the driver's seat side, and the left side of the vehicle (right side of FIG. 1) is the passenger seat side. When the vehicle is a left-hand drive vehicle, the left side of the vehicle (right side in FIG. 1) is the driver's seat side, and the right side of the vehicle (left side in FIG. 1) is the passenger seat side. Further, when the vehicle is a left-hand drive vehicle, the configuration of the wiper device 2 is opposite to the left and right.

The first motor 11 as the first drive source rotates the output shaft forward and backward within a range of a predetermined rotation angle so that each of the driver seat side wiper arm 17 and the passenger seat side wiper arm 35 is placed on the windshield glass 1. Drive source for reciprocating operation. In the exemplary embodiment, when the first motor 11 rotates forward, the driver seat side wiper arm 17 operates so that the driver seat side wiper blade 18 wipes the upper inversion position P1D from the lower inversion position P2D. The side wiper arm 35 operates such that the passenger-side wiper blade 36 wipes the upper inversion position P1P from the lower inversion position P2P. When the first motor 11 rotates in the reverse direction, the driver's seat side wiper arm 17 operates so that the driver's seat side wiper blade 18 wipes the upper inverted position P1D to the lower inverted position P2D, and the passenger seat side wiper arm 35 The passenger-side wiper blade 36 operates so as to wipe from the upper inversion position P1P to the lower inversion position P2P.

The outer edge portion of the windshield glass 1 is a light shielding portion 1A coated with a ceramic black pigment in order to block visible light and ultraviolet rays. The black pigment is applied to the outer edge of the windshield glass 1 on the vehicle interior side, and then melted by being heated at a predetermined temperature, and is fixed on the vehicle interior side surface of the windshield glass 1. The windshield glass 1 is fixed to the vehicle body by an adhesive applied to the outer edge portion. However, as shown in FIG. 1, the light shielding portion 1A that does not transmit ultraviolet rays is provided at the outer edge portion, so that the adhesive by ultraviolet rays is provided. Suppresses deterioration.

When the second motor 12 described later does not operate, the output shaft of the first motor 11 (first output shaft 11A described later) is rotated from 0 ° to a predetermined rotation angle (hereinafter referred to as “first predetermined rotation angle”). By rotating in the forward and reverse directions up to the rotation angle, the driver seat side wiper blade 18 wipes the wiping range H1, and the passenger seat side wiper blade 36 wipes the wiping range Z1.

The second motor 12 as the second drive source has an output shaft (a second output shaft 12A described later) of the second motor 12 at a predetermined rotation angle from 0 ° (hereinafter referred to as “second predetermined rotation angle”). This is a drive source that apparently extends the wiper arm 35 on the passenger seat side by rotating forward and backward at a rotation angle up to. By operating the second motor 12 while the first motor 11 is operating, the passenger seat side wiper arm 35 is apparently extended upward on the passenger seat side, and the passenger seat side wiper blade 36 wipes the wiping range Z2. Further, by changing the magnitude of the second predetermined rotation angle, it is possible to change the range in which the passenger seat side wiper arm 35 extends. For example, if the second predetermined rotation angle is increased, the range in which the passenger seat side wiper arm 35 extends is increased, and if the second predetermined rotation angle is decreased, the range in which the passenger seat side wiper arm 35 is extended is decreased.

The first motor 11 and the second motor 12 are motors that can control the rotation direction of each output shaft to forward rotation and reverse rotation, and can also control the rotation speed of each output shaft. Either a DC motor or a brushless DC motor.

A control circuit 52 for controlling each rotation is connected to the first motor 11 and the second motor 12. The control circuit 52 according to the exemplary embodiment includes, for example, an absolute angle sensor (not shown) as a “rotation angle detection unit” provided near the output shaft end of each of the first motor 11 and the second motor 12. The duty of voltage applied to each of the first motor 11 and the second motor 12 based on the rotation direction, rotation position, rotation speed and rotation angle of the output shaft of each of the first motor 11 and the second motor 12 detected by the Calculate the ratio.

In the present exemplary embodiment, the voltage applied to each of the first motor 11 and the second motor 12 is a pulse that modulates the voltage (approximately 12 V) of the in-vehicle battery as a power source by turning on and off the switching element by a switching element. Generated by width modulation (PWM). In the present exemplary embodiment, the duty ratio is a ratio of the time of one pulse generated when the switching element is turned on to one period of a waveform of a voltage generated by PWM. One period of the waveform of the voltage generated by PWM is the sum of the time of the one pulse described above and the time during which the switching element is turned off and no pulse is generated. The drive circuit 56 turns on and off switching elements in the drive circuit 56 in accordance with the duty ratio calculated by the control circuit 52 to generate voltages to be applied to the first motor 11 and the second motor 12, and the generated voltages are supplied to the first circuit. The voltage is applied to each winding terminal of the first motor 11 and the second motor 12.

Since each of the first motor 11 and the second motor 12 according to the exemplary embodiment has a speed reduction mechanism configured by a worm gear, the rotation direction, the rotation speed, and the rotation angle of each output shaft are set as follows. The rotation speed and rotation angle of the 1 motor 11 main body and the second motor 12 main body are not the same. However, in this exemplary embodiment, each motor and each speed reduction mechanism are inseparably configured, and hence the rotational speed and rotational angle of the output shaft of each of the first motor 11 and the second motor 12 will be described below. The rotation direction, the rotation speed, and the rotation angle of each of the first motor 11 and the second motor 12 are considered.

The absolute angle sensor is provided, for example, in each speed reduction mechanism of the first motor 11 and the second motor 12, and converts the magnetic field (magnetic force) of an excitation coil or a magnet that rotates in conjunction with each output shaft into a current. It is a sensor to detect, for example, a magnetic sensor such as an MR sensor.

The control circuit 52 determines the position of the driver's seat side wiper blade 18 on the windshield glass 1 from the rotation angle of the output shaft of the first motor 11 detected by an absolute angle sensor provided near the output shaft end of the first motor. A computable microcomputer 58 is provided. The microcomputer 58 controls the drive circuit 56 so that the rotational speed of the output shaft of the first motor 11 changes according to the calculated position.

Further, the microcomputer 58 detects the rotation angle of the output shaft of the first motor 11 detected by the absolute angle sensor provided near the output shaft end of the first motor on the windshield glass 1 of the passenger side wiper blade 36. The position is calculated, and the drive circuit 56 is controlled so that the rotational speed of the output shaft of the second motor 12 changes according to the calculated position. Further, the microcomputer 58 calculates the degree of extension of the passenger seat side wiper arm 35 from the rotation angle of the output shaft of the second motor 12 detected by the absolute angle sensor provided near the output shaft end of the second motor 12.

The control circuit 52 is provided with a memory 60 that is a storage device that stores data and programs used to control the drive circuit 56. The memory 60 stores the first motor 11 and the second motor 12 according to the rotation angle of the output shaft of the first motor 11 indicating the positions of the driver-side wiper blade 18 and the passenger-side wiper blade 36 on the windshield glass 1. Data and a program for calculating the rotation speed and the like (including the rotation angle) of each output shaft are stored.

The microcomputer 58 is connected to a vehicle ECU (Electronic Control Unit) 90 that controls the vehicle engine and the like. Further, the vehicle ECU 90 includes a wiper switch 50, a direction indicator switch 54, a washer switch 62, a rain sensor 76, a vehicle speed sensor 92 for detecting the vehicle speed, an in-vehicle camera 94 for photographing the front of the vehicle, a GPS (Global Positioning System). ) A device 96, a steering angle sensor 98, and a millimeter wave radar 102 are connected.

The wiper switch 50 is a switch that turns on or off the power supplied from the vehicle battery to the first motor 11. The wiper switch 50 is a low-speed operation mode selection position for operating the driver-side wiper blade 18 and the passenger-side wiper blade 36 at a low speed, a high-speed operation mode selection position for operating at a high speed, and an intermittent operation that operates intermittently at a constant cycle. The mode selection position can be switched to an AUTO (auto) operation mode selection position and a storage (stop) mode selection position that are operated when the rain sensor 76 detects raindrops. Further, a signal corresponding to the selected position of each mode is output to the microcomputer 58 via the vehicle ECU 90.

When a signal output from the wiper switch 50 according to the selected position of each mode is input to the microcomputer 58 via the vehicle ECU 90, the microcomputer 58 controls the memory 60 to control corresponding to the output signal from the wiper switch 50. This is done using stored data and programs.

In the exemplary embodiment, the wiper switch 50 may be separately provided with an expansion mode switch that changes the wiping range of the passenger-side wiper blade 36 to the wiping range Z2. When the enlargement mode switch is turned on, a predetermined signal is input to the microcomputer 58 via the vehicle ECU 90. When a predetermined signal is input to the microcomputer 58, for example, when the passenger seat wiper blade 36 operates from the lower inversion position P2P to the upper inversion position P1P, the second motor 12 is configured to wipe the wiping range Z2. To control.

The direction indicator switch 54 is a switch for instructing the operation of a vehicle direction indicator (not shown). A signal for turning on the right or left direction indicator is operated to the vehicle ECU 90 by a driver's operation. Output. The vehicle ECU 90 causes the right or left direction indicator lamp to blink based on the signal output from the direction indicator switch 54. A signal output from the direction indicator switch 54 is also input to the microcomputer 58 via the vehicle ECU 90.

The washer switch 62 is a switch for turning on or off the power supplied from the battery of the vehicle to the washer motor 64, the first motor 11 and the second motor 12. For example, the washer switch 62 is provided integrally with an operating means such as a lever provided with the wiper switch 50 described above, and is turned on by an operation such as pulling the lever or the like by a passenger. When the washer switch 62 is turned on, the microcomputer 58 operates the washer motor 64 and the first motor 11. When the wiper blade 36 on the passenger side wipes from the lower reverse position P2P to the upper reverse position P1P, the microcomputer 58 wipes the wiper blade 36 from the upper reverse position P1P so as to wipe the wiping range Z2. When wiping up to the reverse position P2P, the second motor 12 is controlled so as to wipe the wiping range Z1. With this control, the passenger seat side of the windshield glass 1 can be wiped widely.

While the washer switch 62 is on, the washer pump 66 is driven by the rotation of the washer motor 64 provided in the washer device 70. The washer pump 66 pumps the washer liquid in the washer liquid tank 68 to the driver side hose 72A or the passenger side hose 72B. The driver seat side hose 72A is connected to a driver seat side nozzle 74A provided below the driver seat side of the windshield glass 1. Further, the passenger seat side hose 72B is connected to a passenger seat side nozzle 74B provided below the windshield glass 1 on the passenger seat side. The pumped washer liquid is sprayed onto the windshield glass 1 from the driver seat side nozzle 74A and the passenger seat side nozzle 74B. The washer liquid adhering to the windshield glass 1 is wiped together with dirt on the windshield glass 1 by the operating driver side wiper blade 18 and the passenger seat side wiper blade 36.

The microcomputer 58 controls the washer motor 64 so that it operates only while the washer switch 62 is on. Further, the microcomputer 58 controls the first motor 11 so that the operation continues until the driver-side wiper blade 18 and the passenger-side wiper blade 36 reach the lower inversion positions P2D and P2P even when the washer switch 62 is turned off. Control. Further, when the washer switch 62 is turned off when the driver-side wiper blade 18 and the passenger-side wiper blade 36 are wiped toward the upper inversion positions P1D and P1P, the microcomputer 58 The second motor 12 is controlled to wipe the wiping range Z2 until the wiper blade 18 and the passenger side wiper blade 36 reach the upper inversion positions P1D and P1P by the rotation of the first motor 11.

The rain sensor 76 is, for example, a kind of optical sensor provided on the vehicle interior side of the windshield glass 1 and detects water droplets on the surface of the windshield glass 1. As an example, the rain sensor 76 includes an LED that is an infrared light emitting element, a photodiode that is a light receiving element, a lens that forms an infrared optical path, and a control circuit. The infrared rays emitted from the LED are totally reflected by the windshield glass 1, but if there are water droplets on the surface of the windshield glass 1, some of the infrared rays are transmitted through the water droplets and emitted to the outside. The amount of reflection decreases. As a result, the amount of light entering the photodiode that is the light receiving element is reduced. Based on the decrease in the amount of light, water droplets on the surface of the windshield glass 1 are detected.

The vehicle speed sensor 92 is a sensor that detects the rotational speed of the vehicle wheel and outputs a signal indicating the rotational speed. The vehicle ECU 90 calculates the vehicle speed from the signal output from the vehicle speed sensor 92 and the circumference of the wheel.

The in-vehicle camera 94 is a device that captures the front of the vehicle and acquires moving image data. The vehicle ECU 90 can determine whether the vehicle is approaching a curve or the like by performing image processing on moving image data acquired by the in-vehicle camera 94. Further, the vehicle ECU 90 can calculate the brightness in front of the vehicle from the luminance of the moving image data acquired by the in-vehicle camera 94.

As an example, the rain sensor 76 and the in-vehicle camera 94 are provided at a position corresponding to the center upper portion of the windshield glass 1 on the vehicle interior side, and more specifically, provided on the back side of the rearview mirror or the like (not shown). ) There are many cases. However, in the present exemplary embodiment, the positions of the rain sensor 76 and the in-vehicle camera 94 are not limited to the center upper portion of the windshield glass 1 on the passenger compartment side, but are located on the passenger seat side upper portion of the windshield glass 1 on the passenger compartment side. May be. By providing the rain sensor 76 and the in-vehicle camera 94 on the passenger seat side upper portion of the windshield glass 1 in the passenger compartment side, at least a part of information (images and presence / absence of water droplets) of the non-wiping range X shown in FIG. 1 is acquired. You may comprise. Note that the non-wiping range X in FIG. 20 is an area that exists in the wiping range Z2 when the passenger-side wiper arm 35 is extended, but outside the wiping range Z1 when the passenger-side wiper arm 35 is not extended. .

The microcomputer 58 may control the second motor 12 to wipe the wiping range Z2 when the rain sensor 76 detects water droplets on the surface of the windshield glass 1, for example, the non-wiping range X.

Further, the microcomputer 58 may control the second motor 12 to wipe the wiping range Z2 based on the pixel feature amount of the image data acquired by the in-vehicle camera 94. For example, the microcomputer 58 wipes when the difference between the image feature amount of the wiping range Z1 of the windshield glass 1 and the image feature amount of the non-wiping range X in the image data acquired by the in-vehicle camera 94 is equal to or larger than a predetermined value. The second motor 12 is controlled to wipe the range Z2.

The image feature amount is, for example, a luminance value, and the microcomputer 58 adheres to the non-wiping range X when the difference between the luminance value of the wiping range Z1 and the luminance value of the non-wiping range X becomes a predetermined value or more. And the second motor 12 is controlled to wipe the wiping range Z2.

The image feature amount is an optical flow indicating a motion vector of the front end portion of the passenger-side wiper blade 36, and the microcomputer 58 has a predetermined amount of change in the motion vector of the passenger-side wiper blade 36 indicated by the optical flow. When the value is less than or equal to the value, the second motor 12 is controlled to wipe the wiping range Z2 on the assumption that snow is present on the windshield glass 1.

The GPS device 96 is a device that calculates the current position of the vehicle based on a positioning signal received from a GPS satellite in the sky. In this exemplary embodiment, the GPS device 96 dedicated to the wiper system 100 is used. However, when the vehicle includes another GPS device such as a car navigation system, the other GPS device may be used. In the exemplary embodiment, the GPS device 96 is used. However, the present invention is not limited to this, and another satellite positioning system (Navigation Satellite System) may be used.

The steering angle sensor 98 is a sensor that is provided on a rotation shaft (not shown) of the steering as an example and detects the rotation angle of the steering.

The millimeter wave radar 102 is a front millimeter wave radar that detects a distance to an obstacle ahead, a front side millimeter wave radar that detects a distance to an obstacle ahead, and a rear millimeter that detects a distance to an obstacle behind. Includes wave radar, rear side millimeter wave radar that detects distance to rear side obstacles.

The front millimeter wave radar is provided, for example, near the center of the front grille of the vehicle, and the front side millimeter wave radar is provided near both ends in the vehicle width direction in the bumper, and emits millimeter waves to the front and front sides of the vehicle, respectively. Thus, the radio wave reflected from the object is received, and the distance to the object, the relative speed with the own vehicle, and the like are measured based on the propagation time and the frequency difference caused by the Doppler effect. The rear millimeter wave radar and the rear side millimeter wave radar are provided in a rear bumper of the vehicle, and receive radio waves reflected from the object by emitting millimeter waves to the rear and rear sides of the vehicle, The distance to the object and the relative speed with the vehicle are measured based on the propagation time and the frequency difference caused by the Doppler effect.

Hereinafter, the configuration of the wiper apparatus 2 according to the exemplary embodiment will be described with reference to FIGS. As shown in FIGS. 2 and 4 to 8, the wiper device 2 according to this exemplary embodiment includes a plate-like central frame 3 and one end fixed to the central frame 3. A pair of pipe frames 4 and 5 extending on both sides are provided. A first holder member 6 including a driver seat side pivot shaft 15 of the driver seat side wiper arm 17 and the like is formed at the other end portion of the pipe frame 4. Further, the second holder member 7 provided with the second passenger seat side pivot shaft 22 of the passenger seat side wiper arm 35 and the like is formed at the other end portion of the pipe frame 5. The wiper device 2 is supported on the vehicle by a support portion 3A provided on the central frame 3, and each of the fixing portion 6A of the first holder member 6 and the fixing portion 7A of the second holder member 7 is attached to the vehicle by a bolt or the like. By being fastened, it is fixed to the vehicle.

The wiper device 2 includes a first motor 11 and a second motor 12 for driving the wiper device 2 on the back surface (the surface facing the passenger compartment side) of the central frame 3. The first output shaft 11A of the first motor 11 passes through the central frame 3 and protrudes from the surface of the central frame 3 (surface on the outside of the vehicle), and a first drive crank arm is provided at the tip of the first output shaft 11A. One end of 13 is fixed. The second output shaft 12A of the second motor 12 passes through the central frame 3 and protrudes from the surface of the central frame 3, and one end of the second drive crank arm 14 is fixed to the tip of the second output shaft 12A. .

A driver seat side pivot shaft 15 is rotatably supported by the first holder member 6, and one end of the driver seat side swing lever 16 is provided at the base end portion (the back side in FIG. 2) of the driver seat side pivot shaft 15. The arm head of the driver's seat side wiper arm 17 is fixed to the tip of the driver's seat side pivot shaft 15 (front side in FIG. 2). As shown in FIG. 1, a driver seat side wiper blade 18 for wiping the driver seat side of the windshield glass 1 is connected to the tip of the driver seat side wiper arm 17.

The other end of the first drive crank arm 13 and the other end of the driver seat side swing lever 16 are connected via a first connecting rod 19. When the first motor 11 is driven, the first drive crank arm 13 rotates, and the rotational force is transmitted to the driver seat side swing lever 16 via the first connecting rod 19, and the driver seat side swing lever 16. Sway. When the driver seat side swing lever 16 is swung, the driver seat side wiper arm 17 is also swung, and the driver seat side wiper blade 18 wipes the wiping range H1 between the lower inversion position P2D and the upper inversion position P1D.

FIG. 3 is a cross-sectional view of the second holder member 7 taken along line AA in FIG. As shown in FIG. 3, the first holder seat side pivot shaft 21 is supported on the second holder member 7 so as to be rotatable about the first axis L1, and the second passenger seat side pivot shaft 22 is secondly supported. It is supported so as to be rotatable about the axis L2. In the exemplary embodiment, the first axis L1 and the second axis L2 are arranged on the same straight line L (concentric). FIG. 3 shows a state where the waterproof cover K shown in FIG. 2 and FIGS. 4 to 8 is removed.

The cylindrical part 7B is formed in the second holder member 7, and the first passenger seat side pivot shaft 21 is rotatably supported via a bearing 23 on the inner peripheral side of the cylindrical part 7B. The first passenger seat side pivot shaft 21 is formed in a cylindrical shape, and the second passenger seat side pivot shaft 22 is rotatably supported via a bearing 24 on the inner peripheral side of the first passenger seat side pivot shaft 21. .

One end of the first passenger seat side swing lever 25 is fixed to the base end portion of the first passenger seat side pivot shaft 21, and the first drive lever 26 has a first drive lever 26 attached to the distal end portion of the first passenger seat side pivot shaft 21. One end is fixed. As shown in FIG. 2, the other end of the first passenger seat side swing lever 25 and the other end of the driver seat side swing lever 16 are connected by a second connecting rod 27. Accordingly, when the first motor 11 is driven and the driver's seat side swing lever 16 is pivoted, the second connecting rod 27 transmits the driving force to the first passenger's seat side swing lever 25 and the first passenger seat side swing lever. 25, the first drive lever 26 is swung (rotated) around the first axis L1.

As shown in FIG. 3, the second passenger seat side pivot shaft 22 is formed longer than the first passenger seat side pivot shaft 21, and the base end portion and the distal end portion of the second passenger seat side pivot shaft 22 are the first. One end of a second passenger seat side swinging lever 28 is fixed to the base end portion of the second passenger seat side pivot shaft 21 so as to protrude in the axial direction from the passenger seat side pivot shaft 21. One end of the second drive lever 29 is fixed to the tip portion.

The other end of the second drive crank arm 14 and the other end of the second passenger seat side swing lever 28 are connected by a third connecting rod 31. Therefore, when the second motor 12 is driven, the second drive crank arm 14 rotates, and the third connecting rod 31 transmits the driving force of the second drive crank arm 14 to the second passenger seat side swing lever 28. The second drive lever 29 is swung (rotated) together with the second passenger seat-side rocking lever 28. As described above, the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are provided coaxially, but the first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not mutually connected. The first passenger seat side pivot shaft 21 and the second passenger seat side pivot shaft 22 are not interlocked and rotate independently of each other.

As shown in FIGS. 2 and 4 to 8, the wiper device 2 includes a first driven lever having a base end portion coupled to a third axis L3 on the other end side of the first drive lever 26 so as to be rotatable. 32.

The wiper device 2 has a base end portion coupled to be rotatable about a fourth axis L4 on the distal end side of the first driven lever 32 and a fifth axis L5 on the other end side of the second drive lever 29. An arm head 33 which is a second driven lever having a distal end connected to be rotatable about the center is provided. The arm head 33 constitutes a passenger-side wiper arm 35 together with a retainer 34 whose base end is fixed to the distal end of the arm head 33. A front passenger side wiper blade 36 for wiping the front passenger side of the windshield glass 1 is connected to the front end of the front passenger side wiper arm 35.

The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the first axis L1 (second axis L2) to the third axis L3, and from the fourth axis L4 to the fifth. It connects so that the length to the axis line L5 may become the same. The first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33 have a length from the third axis L3 to the fourth axis L4, and the first axis L1 (second axis L2) to the fifth. It connects so that the length to the axis line L5 may become the same. Accordingly, the first drive lever 26 and the arm head 33 are kept parallel, and the second drive lever 29 and the first driven lever 32 are kept parallel. The first drive lever 26 and the second drive lever 29, the 1st driven lever 32, and the arm head 33 comprise the substantially parallelogram-shaped link mechanism (expansion-contraction mechanism).

The fifth axis L5 is a fulcrum when the passenger-side wiper arm 35 operates. The passenger-side wiper arm 35 is rotated about the fifth axis L5 by the driving force of the first motor 11 to windshield glass. Reciprocates on 1. Further, the second motor 12 passes the fifth axis L5 through a substantially parallelogram link mechanism including the first drive lever 26, the second drive lever 29, the first driven lever 32, and the arm head 33. As shown in FIGS. 4 to 6, the windshield glass 1 is moved more than in the case of FIGS. By such movement of the fifth axis L5, the passenger side wiper arm 35 is apparently extended. Accordingly, when the second motor 12 is operated together with the first motor 11, the passenger side wiper blade 36 wipes the wiping range Z2.

When the second motor 12 does not operate and only the first motor 11 operates, the fifth axis L5 starts from the position shown in FIGS. 2, 7, and 8 (hereinafter referred to as “first position”). It does n’t move. Accordingly, the passenger side wiper arm 35 operates between the lower inversion position P2P and the upper inversion position P1P while drawing a substantially arc-shaped locus around the fifth axis L5 whose position does not change, and the passenger seat side wiper blade 36 The substantially fan-shaped wiping range Z1 is wiped.

In this exemplary embodiment, when it is necessary to wipe the windshield glass 1 widely, during the forward movement when the passenger seat wiper blade 36 operates from the lower inversion position P2P to the upper inversion position P1P (during wiping the outward path). The first motor 11 and the second motor 12 are each controlled so as to wipe the wiping range Z2. The first motor 11 and the second motor 11 wipe the wiping range Z1 when the passenger seat wiper blade 36 reversed at the upper reversal position P1P moves toward the lower reversal position P2P (return wiping). Each motor 12 is controlled. When the passenger-side wiper blade 36 reciprocates between the lower inversion position P2P and the upper inversion position P1P, the wiping range Z2 is wiped in the forward movement and the wiping range Z1 is wiped in the backward movement. 1 wide range can be wiped off. Alternatively, when the passenger-side wiper blade 36 reciprocates between the lower inversion position P2P and the upper inversion position P1P, the wiping range Z1 is wiped in the forward movement and the wiping range Z2 is wiped in the backward movement. A wide range of windshield glass 1 can be wiped off. Alternatively, the wiping range Z2 may be wiped at the time of forward movement and backward movement.

Hereinafter, the operation of the wiper device 2 according to the exemplary embodiment will be described. In the present exemplary embodiment, the driver-seat-side wiper arm 17 and the driver-seat-side wiper blade 18 only operate around the driver-seat-side pivot shaft 15 according to the rotation of the first motor 11. 35 and the operation of the passenger seat side wiper blade 36 will be described in detail.

FIG. 2 shows a state in which the passenger-side wiper blade 36 is positioned at the lower inversion position P2P, and the passenger-side wiper arm 35 is in the stop position. In this state, when the washer switch 62 or the enlargement mode switch is turned on, the first output shaft 11A of the first motor 11 is rotated in the rotation direction CC1 shown in FIG. The first drive lever 26 starts rotating, and the passenger seat side wiper arm 35 starts rotating around the fifth axis L5. At the same time, the second output shaft 12A of the second motor 12 also starts to rotate in the rotational direction CC2 shown in FIG. In the exemplary embodiment, the rotation of the first output shaft 11A in the rotation direction CC1 and the rotation of the second output shaft 12A in the rotation direction CC2 are defined as positive rotations of the respective output shafts.

FIG. 4 shows a state where the passenger-side wiper blade 36 wipes the windshield glass 1 halfway (approximately 1/4 of the forward travel). In the exemplary embodiment, when the first motor 11 starts to rotate in the rotational direction CC1, the driving force generated by the rotation of the second motor 12 in the rotational direction CC2 is transmitted to the second drive lever 29. The second drive lever 29 to which the driving force of the second motor 12 is transmitted operates in the operation direction CW3, and the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, is located above the passenger seat side of the windshield glass 1. Move towards.

FIG. 5 shows that when the first output shaft 11A is rotated to an intermediate rotation angle between 0 ° and the first predetermined angle, the first drive lever 26 is further rotated, and the front passenger side wiper blade 36 is in the lower inverted position. A case is shown in which a substantially intermediate point of the stroke (forward stroke) between P2P and the upper reversal position P1P is reached. In FIG. 5, the second output shaft 12A of the second motor 12 is also rotated to the second predetermined rotation angle in the rotation direction CC2 shown in FIG. Due to the maximum rotation angle of the second output shaft 12A in the forward rotation, the fifth axis L5, which is the fulcrum of the passenger-side wiper arm 35, is connected to the second drive crank arm 14, the third connecting rod 31, the second The passenger seat side swing lever 28 and the second drive lever 29 are lifted to the uppermost position (second position). As a result, the front end portion of the passenger seat side wiper blade 36 is moved to a position near the upper corner of the windshield glass 1 on the passenger seat side, as shown in FIG. The intermediate rotation angle described above is about half of the first predetermined rotation angle, but is set individually according to the shape of the windshield glass 1 and the like. Note that the second position is a position at which the fifth axis L5 is disposed at the uppermost position in each magnification. Specifically, the second position is determined when the first output shaft 11A is between 0 ° and the first predetermined angle when the passenger-side wiper blade wipes a range wider than the wiping range Z1 (for example, the wiping range Z2). This is the position at which the fifth axis L5 is arranged when rotated to the intermediate rotation angle.

FIG. 6 shows that when the first drive lever 26 is further rotated, the passenger-side wiper blade 36 reaches approximately 3/4 of the stroke (forward stroke) between the lower inversion position P2P and the upper inversion position P1P. Shows the case. In FIG. 6, the rotation direction of the first output shaft 11A of the first motor 11 is the same as that of FIGS. 4 and 5, but the second output shaft 12A of the second motor 12 is opposite to the case of FIGS. It rotates in the rotation direction CW2 (reverse rotation). When the second output shaft 12A rotates in the rotation direction CW2, the second drive lever 29 operates in the operation direction CC3, and the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, is moved downward from the second position. The As a result, the front passenger side wiper blade 36 moves on the windshield glass 1 while wiping the wiping range Z2 while drawing the locus indicated by the broken line above the wiping range Z2 shown in FIG.

FIG. 7 shows a case where the first output shaft 11A of the first motor 11 rotates forward to the first predetermined rotation angle and the second output shaft 12A of the second motor 12 rotates reversely at the second predetermined rotation angle. Yes. Since the rotation angle of the first output shaft 11A of the first motor 11 in the forward rotation is maximized, the driver seat side wiper arm 17 and the driver seat side wiper blade 18 reach the upper inversion position P1D. Further, the second output shaft 12A of the second motor 12 is reversed at the second predetermined rotation angle from the state shown in FIG. 5 (the state where the second output shaft 12A has reached the second predetermined rotation angle by forward rotation). Due to the rotation, the fifth axis L5, which is the fulcrum of the passenger-side wiper arm 35, is at the first position, which is the position before the second output shaft 12A of the second motor 12 shown in FIG. I'm back. As a result, the passenger seat side wiper arm 35 and the passenger seat side wiper blade 36 reach the same upper inversion position P1P as the wiping range Z1 when the second motor 12 is not driven.

FIG. 8 shows a state in which the driver's seat side wiper arm 17 and the driver's seat side wiper blade 18 and the passenger's seat side wiper arm 35 and the passenger's seat side wiper blade 36 move from the upper inverted positions P1D and P1P to the lower inverted positions P2D and P2P. The state (return stroke) is shown. At the time of backward movement, the first output shaft 11A of the first motor 11 rotates in the reverse direction, and rotates in the rotation direction CW1 in the reverse direction to the case of FIGS. However, the second output shaft 12A of the second motor 12 does not rotate, and therefore the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, does not move from the first position, so the first output shaft 11A of the first motor 11 does not move. Is reversely rotated, the passenger seat side wiper arm 35 draws a substantially arc-shaped locus. As a result, the passenger side wiper blade 36 connected to the front end of the passenger side wiper arm 35 wipes the wiping range Z1.

FIG. 9 is a circuit diagram schematically showing a circuit of the wiper system 100 according to the exemplary embodiment. As shown in FIG. 9, the wiper system 100 includes a control circuit 52 and a drive circuit 56.

As described above, the control circuit 52 includes the microcomputer 58 and the memory 60. The microcomputer 58 includes a wiper switch 50, a direction indicator switch 54, a washer switch 62, a vehicle ECU 90 (not shown), A rain sensor 76, a vehicle speed sensor 92, an in-vehicle camera 94, a GPS device 96, a steering angle sensor 98, and a millimeter wave radar 102 are connected to each other.

The drive circuit 56 includes a first pre-driver 104 and a first motor drive circuit 108 for driving the first motor 11, and a second pre-driver 106 and a second motor drive circuit 110 for driving the second motor 12. ing. The drive circuit 56 includes a relay drive circuit 78, an FET drive circuit 80, and a washer motor drive circuit 57 for driving the washer motor 64.

The microcomputer 58 of the control circuit 52 rotates the first motor 11 via the second pre-driver 106 by turning on and off the switching elements constituting the first motor driving circuit 108 via the first pre-driver 104. The rotation of the second motor 12 is controlled by turning on and off the switching elements of the two-motor drive circuit 110. The microcomputer 58 controls the rotation of the washer motor 64 by controlling the relay drive circuit 78 and the FET drive circuit 80.

When the first motor 11 and the second motor 12 are brushed DC motors, the first motor drive circuit 108 and the second motor drive circuit 110 each include four switching elements. The switching element is, for example, an N-type FET (field effect transistor).

As shown in FIG. 9, the first motor drive circuit 108 includes FETs 108A to 108D. The FET 108 </ b> A has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to one end of the first motor 11. The FET 108 </ b> B has a drain connected to the power supply (+ B), a gate connected to the first pre-driver 104, and a source connected to the other end of the first motor 11. The FET 108C has a drain connected to one end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded. The FET 108D has a drain connected to the other end of the first motor 11, a gate connected to the first pre-driver 104, and a source grounded.

The first pre-driver 104 controls driving of the first motor 11 by switching a control signal supplied to the gates of the FETs 108A to 108D in accordance with a control signal from the microcomputer 58. That is, when the first pre-driver 104 rotates the first output shaft 11A of the first motor 11 in a predetermined direction (forward rotation), the first pre-driver 104 turns on the set of the FET 108A and the FET 108D and the first output of the first motor 11 When rotating the shaft 11A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 108B and the FET 108C is turned on. Further, the first pre-driver 104 performs PWM for intermittently turning on and off the FET 108A and the FET 108D based on a control signal from the microcomputer 58.

The first pre-driver 104 controls the rotational speed of the first motor 11 in the forward rotation by changing the duty ratio related to the on / off of the FET 108A and the FET 108D by PWM. If the duty ratio is increased, the effective value of the voltage applied to the terminal of the first motor 11 during forward rotation is increased, and the rotation speed of the first motor 11 is increased.

Similarly, the first pre-driver 104 controls the rotational speed in the reverse rotation of the first motor 11 by changing the duty ratio related to on / off of the FET 108B and the FET 108C by PWM. If the duty ratio increases, the effective value of the voltage applied to the terminal of the first motor 11 during reverse rotation increases, and the rotation speed of the first motor 11 increases.

The second motor drive circuit 110 includes FETs 110A to 110D. The FET 110 </ b> A has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to one end of the second motor 12. The FET 110 </ b> B has a drain connected to the power supply (+ B), a gate connected to the second pre-driver 106, and a source connected to the other end of the second motor 12. The FET 110C has a drain connected to one end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded. The FET 110D has a drain connected to the other end of the second motor 12, a gate connected to the second pre-driver 106, and a source grounded.

The second pre-driver 106 controls the driving of the second motor 12 by switching the control signal supplied to the gates of the FETs 110A to 110D in accordance with the control signal from the microcomputer 58. That is, when the second pre-driver 106 rotates the second output shaft 12A of the second motor 12 in a predetermined direction (forward rotation), the second pre-driver 106 turns on the set of the FET 110A and the FET 110D and outputs the second output of the second motor 12. When rotating the shaft 12A in the direction opposite to the predetermined direction (reverse rotation), the set of the FET 110B and the FET 110C is turned on. The second pre-driver 106 controls the rotation speed of the second motor 12 by performing PWM like the first pre-driver 104 described above based on the control signal from the microcomputer 58.

A two-pole sensor magnet 112A is fixed to the output shaft end portion 112 of the first output shaft 11A in the speed reduction mechanism of the first motor 11, and a first absolute angle sensor 114 is provided so as to face the sensor magnet 112A. ing.

A two-pole sensor magnet 116A is fixed to the output shaft end portion 116 of the second output shaft 12A in the speed reduction mechanism of the second motor 12, and a second absolute angle sensor 118 is provided so as to face the sensor magnet 116A. ing.

The first absolute angle sensor 114 detects the magnetic field of the sensor magnet 112A, and the second absolute angle sensor 118 detects the magnetic field of the sensor magnet 116A, and outputs a signal corresponding to the strength of the detected magnetic field. The microcomputer 58 determines the rotational angle and rotational position of each of the first output shaft 11A of the first motor 11 and the second motor 12 based on the signals output from the first absolute angle sensor 114 and the second absolute angle sensor 118, respectively. The rotation direction and the rotation speed are calculated.

From the rotation angle of the first output shaft 11A of the first motor 11, the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 can be calculated. Further, from the rotation angle of the second output shaft 12A of the second motor 12, the degree of apparent extension (degree of enlargement) of the passenger-side wiper arm 35 can be calculated. The microcomputer 58 determines the rotation angle of the second output shaft 12A based on the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat wiper blade 18 calculated from the rotation angle of the first output shaft 11A. By controlling the above, the operations of the first motor 11 and the second motor 12 are synchronized. As an example, in the memory 60, the position (or the rotation angle of the first output shaft 11A) between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 and the rotation angle of the second output shaft 12A (For example, a second output shaft rotation angle map described later) is stored in advance, and the rotation angle of the second output shaft 12A is controlled according to the rotation angle of the first output shaft 11A according to the map.

The washer motor drive circuit 57 includes a relay unit 84 incorporating two relays RLY1 and RLY2, and two

FETs

86A and 86B. The relay coils of the relays RLY1 and RLY2 of the relay unit 84 are connected to the relay drive circuit 78, respectively. The relay drive circuit 78 switches the relays RLY1 and RLY2 on and off (excitation / excitation stop of the relay coil). When the relay coils are not excited, the relays RLY1 and RLY2 maintain the state in which the common terminals 84C1 and 84C2 are connected to the first terminals 84A1 and 84A2 (off state), respectively, and the relay coils are excited. The common terminals 84C1 and 84C2 are switched to the state of connecting to the second terminals 84B1 and 84B2, respectively. The common terminal 84C1 of the relay RLY1 is connected to one end of the washer motor 64, and the common terminal 84C2 of the relay RLY2 is connected to the other end of the washer motor 64. The first terminals 84A1 and 84A2 of the relays RLY1 and RLY2 are connected to the drain of the FET 86B, and the second terminals 84B1 and 84B2 of the relays RLY1 and RLY2 are connected to the power source (+ B).

The FET 86B has a gate connected to the FET drive circuit 80 and a source grounded. The duty ratio related to the on / off of the FET 86B is controlled by the FET drive circuit 80. An FET 86A is provided between the drain of the FET 86B and the power supply (+ B). The FET 86A is provided for the purpose of using a parasitic diode for absorbing a surge without switching on and off because no control signal is input to the gate.

The relay driving circuit 78 and the FET driving circuit 80 control the driving of the washer motor 64 by switching on and off the two relays RLY1, RLY2 and the FET 86B. That is, when rotating the output shaft of the washer motor 64 in a predetermined direction (forward rotation), the relay drive circuit 78 turns on the relay RLY1 (relay RLY2 is off), and the FET drive circuit 80 turns on the FET 86B with a predetermined duty ratio. Let With the above control, the rotation speed of the output shaft of the washer motor 64 is controlled.

FIG. 10A shows an example of a second output shaft rotation angle map that defines the rotation angle of the second output shaft 12A in accordance with the rotation angle of the first output shaft 11A in the present exemplary embodiment. The horizontal axis of FIG. 10A is the first output shaft rotation angle θ _A that is the rotation angle of the first output shaft 11A, and the vertical axis is the second output shaft rotation angle θ _B that is the rotation angle of the second output shaft 12A. is there. The origin O in FIG. 10A shows a state where the passenger seat side wiper blade 36 is at the lower inversion position P2P. In FIG. 10A, θ ₁ indicates a state in which the first output shaft 11A is rotated by the first predetermined rotation angle θ ₁ and the passenger seat side wiper blade 36 is at the upper inversion position P1P.

When the first absolute angle sensor 114 starts rotation of the first output shaft 11A of the first motor 11, the microcomputer 58 detects the rotation angle of the first output shaft 11A detected by the first absolute angle sensor 114 and the second output shaft. Check the rotation angle map. With this collation, the second output shaft rotation angle θ _B corresponding to the first output shaft rotation angle θ _A detected by the first absolute angle sensor 114 is calculated from the angle indicated by the curve 190 in FIG. so that the second output shaft rotation angle theta _B controls the rotation angle of the second output shaft 12A of the second motor 12. FIG. 10A shows three second output shaft rotation angle maps of

curves

190, 192, and 194. A curve 190 indicates the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 100%. A curve 192 represents the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 50%. A curve 194 shows the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 0%.

When the enlargement ratio is equivalent to 0%, that is, when the second motor 12 does not rotate, theoretically, the rotation angle of the second output shaft 12A is always 0 ° regardless of the value of the first output shaft rotation angle θ _A. become. However, in the present exemplary embodiment, the link mechanism that moves the fifth axis L5, which is the fulcrum of the passenger seat side wiper arm 35, also causes the driver motor side wiper arm 17 and the passenger seat side wiper arm 35 to reciprocate. may driving force affects the rotation angle of the second output shaft 12A is in fact might not always 0 ° regardless of the value of the first output shaft rotation angle theta _a.

In the present exemplary embodiment, the microcomputer 58 determines that the first absolute angle sensor 114 starts changing the rotation angle of the first output shaft 11A of the first motor 11 from 0 ° in the positive rotation direction. It is determined that the wiper blade 36 has started to move from the lower inversion position P2P, and the second output shaft 12A starts to rotate forward. As described above, the microcomputer 58 determines the rotation angle of the second output shaft 12A corresponding to the rotation angle of the first output shaft 11A using the second output shaft rotation angle map. 2 The rotation angle of the second output shaft 12A is monitored based on the signal from the absolute angle sensor 118, and the rotation of the second motor 12 is controlled so as to be the rotation angle determined using the second output shaft rotation angle map. . When the second output shaft rotation angle map indicated by the curve 190 is used, when the first output shaft rotation angle θ _A becomes an intermediate rotation angle θ _m between 0 ° and the first predetermined rotation angle θ _1. The rotation angle of the second output shaft 12A in the positive rotation is set to the second predetermined rotation angle θ ₂ . When the rotation angle of the second output shaft 12A in the forward rotation becomes the second predetermined rotation angle θ ₂ , the fifth axis L5, which is the fulcrum of the passenger seat side wiper arm 35, is positioned above the passenger seat side on the windshield glass 1 ( To the second position).

After the rotation angle in the forward rotation of the second output shaft 12A reaches a second predetermined rotational angle theta _2, in accordance with the curve 190 is a second output shaft rotation angle map, reduces the rotation angle of the second output shaft 12A . Specifically, the rotation angle of the first output shaft 11A reaches the first predetermined rotational angle theta _1, the second output shaft 12A second predetermined rotation until the passenger's side wiper blade 36 reaches the upper reversal position P1P By rotating backward at an angle θ ₂ , the rotation angle of the second output shaft 12A is reduced to 0 °. By the reverse rotation of the second output shaft 12A, the fifth axis L5 that is the fulcrum of the passenger seat side wiper arm 35 is returned to the original position (first position).

Further, when the second output shaft rotation angle map shown by the curve 192 is used, the first output shaft rotation angle θ _A becomes an intermediate rotation angle θ _m between 0 ° and the first predetermined rotation angle θ _1. In this case, the rotation angle of the second output shaft 12A in the forward rotation is set to θ ₃ which is approximately ½ of the second predetermined rotation angle θ ₂ . When the rotation angle at the forward rotation of the second output shaft 12A is θ ₃ , the fifth axis L5, which is a fulcrum of the passenger seat side wiper arm 35, is moved upward on the passenger seat side on the windshield glass 1. The movement amount of the 5-axis line L5 is suppressed as compared with the case where the curve 190 is used, and the enlargement ratio is 50%.

After the rotation angle of the second output shaft 12A in the forward rotation reaches θ ₃ , the rotation angle of the second output shaft 12A is decreased according to the curve 192 that is the second output shaft rotation angle map. Specifically, the second output shaft 12A is reversed by θ ₃ until the rotation angle of the first output shaft 11A reaches the first predetermined rotation angle θ ₁ and the passenger seat wiper blade 36 reaches the upper inversion position P1P. By rotating, the rotation angle of the second output shaft 12A is reduced to 0 °. By the reverse rotation of the second output shaft 12A, the fifth axis L5 that is the fulcrum of the passenger seat side wiper arm 35 is returned to the original position (first position).

The above description is a case where the wiping range Z2 is wiped while the passenger seat side wiper blade 36 is moved from the lower inversion position P2P to the upper inversion position P1P. When the wiping range Z2 is wiped while the passenger-side wiper blade 36 is moved from the upper inversion position P1P to the lower inversion position P2P, the rotation angle of the first output shaft 11A is reversed from 0 ° by the first absolute angle sensor 114. When the change starts in the rotation direction, it is determined that the passenger-side wiper blade 36 has started to move from the upper reversal position P1P, and the second output shaft 12A of the second motor 12 starts to rotate forward. Note that the second output shaft rotation angle map shown in FIG. 10A is has a symmetrical curve 190 by an intermediate rotation angle theta _m to the shaft, but is not limited thereto. The curve of the map is individually set according to the shape of the windshield glass 1 and the like.

Further, the microcomputer 58 changes the wiping speed of the wiper blade based on the position between the lower inversion position P2D and the upper inversion position P1D of the driver seat side wiper blade 18 and the degree of enlargement of the passenger seat side wiper arm 35. It is also possible to perform control such as Hereinafter, an example of wiping speed control when the second predetermined rotation angle, which is the rotation angle of the second output shaft 12A, is set large to increase the degree of expansion of the passenger seat side wiper arm 35 will be described. In such a case, the rotation speed of the first output shaft 11A is gradually reduced as the rotation angle of the first output shaft 11A of the first motor 11 approaches the intermediate rotation angle. When the rotation angle of the first output shaft 11A reaches the intermediate rotation angle, that is, when the passenger seat side wiper arm 35 is extended to the maximum, control is performed so that the rotation speed of the first output shaft 11A is minimized. To do. For example, a map (not shown) of the rotation speed of the first output shaft 11A defined according to the rotation angle of the first output shaft 11A is used for controlling the rotation speed of the first output shaft 11A. Further, the rotational speed of the second output shaft 12A is also controlled in accordance with the rotational speed of the first output shaft 11A. For example, if the second output shaft rotation angle map as shown in FIG. 10A is used, the rotation of the second output shaft 12A can be synchronized with the rotation of the first output shaft 11A. Corresponding to the increase / decrease in the rotation speed, the rotation speed of the second output shaft 12A can also be controlled. With this control, the speed at which the passenger-side wiper arm 35 is extended and the wiping speed of the passenger-side wiper blade 36 can be alleviated, and the possibility that the passenger feels uncomfortable that the passenger-side wiper arm 35 has suddenly extended can be reduced. .

As described above, in FIG. 10A, the two second output shaft rotation angle maps of the

curves

190 and 192 stored in the memory 60 are used, but as shown in FIG. 10B, the difference 200 between the

curves

190 and 190 is obtained. May be stored in the memory 60, and the second output shaft rotation angle θ _B may be controlled using the curve 190 and the difference 200 when wiping at 50% magnification.

FIG. 11 shows an example of a change in the wiping range according to the enlargement ratio. In FIG. 11, the wiping range Z1 shows the case where the enlargement rate is 0%, the wiping range Z2 shows the case where the enlargement rate is 100%, and the wiping range Z3 shows the case where the enlargement rate is 50%. As shown in FIG. 11, the water droplets are scattered outside the front passenger seat (side surface of the vehicle) of the windshield glass 1 by changing the enlargement ratio according to the degree of the water droplet flowing down on the windshield glass 1. To prevent.

Hereinafter, control of the wiper system 100 according to the exemplary embodiment will be described. FIG. 12 is a flowchart illustrating an example of water droplet scattering prevention processing in the wiper system 100 according to the exemplary embodiment. In step 120, it is determined whether or not the wiper switch 50 is turned on.

If the determination in step 120 is affirmative, it is determined in step 122 whether or not a pedestrian or motorcycle has been detected in the left direction of the vehicle (outside the passenger seat). Various methods are conceivable for detecting the pedestrian or the two-wheeled vehicle. For example, the pedestrian or the two-wheeled vehicle is detected by the millimeter wave radar 102 included in the vehicle. Moreover, you may detect a pedestrian or a two-wheeled vehicle by image-processing the image data acquired with the vehicle-mounted camera 94 by a known method.

If the determination in step 122 is affirmative, in step 124, a wiping operation is performed to make the enlargement rate at the backward movement smaller than the enlargement rate at the forward movement, and the process is returned. If the second output shaft rotation angle map as shown in FIG. 10A is used, the wiping operation is performed at an enlargement ratio of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement, and the curve during the backward movement. Using the second output shaft rotation angle map 192, the wiping operation is performed so that the enlargement ratio at the time of backward movement with respect to the enlargement ratio at the time of the previous forward movement becomes 50%. By suppressing the enlargement ratio at the time of backward movement, the wiping operation of the wiper blade 36 on the passenger seat side is avoided while avoiding water droplets flowing down from the upper part on the passenger seat side of the windshield glass 1, so Scattering can be suppressed. In addition, since the water droplet which flows down from the passenger seat side upper part of the windshield glass 1 is wiped off by the wiping operation | movement at the time of the outward movement which enlarged the expansion ratio, the visibility from a driver's seat is ensured.

It should be noted that the operations of the forward movement enlargement ratio 100% in step 124 and the backward movement enlargement ratio 50% with respect to the previous forward movement enlargement ratio are executed at a predetermined number of reciprocations of 1 or more, and the process is returned. The number of reciprocations is arbitrary, but the number of times that water droplets on the windshield glass 1 can be effectively wiped is determined through experiments using actual machines.

As described above, according to the present exemplary embodiment, when a pedestrian or the like existing outside the passenger seat of the vehicle is detected by the millimeter wave radar 102 or the in-vehicle camera 94, the passenger seat side wiper arm 35 is enlarged at the time of return. By suppressing the rate, it is possible to prevent water droplets from scattering to pedestrians and the like.

In addition to detection by the millimeter wave radar 102 or the in-vehicle camera 94, by detecting radio waves transmitted from a portable information terminal carried by a pedestrian or the like, a pedestrian or the like existing outside the passenger seat of the vehicle is detected. May be. When radio waves from the portable information terminal are detected, it is possible to prevent water droplets from being scattered to pedestrians and the like by suppressing the enlargement ratio of the passenger-side wiper arm 35 during backward movement.

[Second exemplary embodiment]
Subsequently, a second exemplary embodiment of the present disclosure will be described. Since the configuration of the wiper system according to the exemplary embodiment is the same as that of the wiper system 100 according to the first exemplary embodiment shown in FIGS. 1 to 9, detailed description thereof is omitted.

In the present exemplary embodiment, control is performed to change the enlargement ratio of the passenger-side wiper arm 35 in more steps than in the first exemplary embodiment in accordance with the degree to which water drops flow down on the windshield glass 1. . FIG. 13 shows an example of a second output shaft rotation angle map that defines the rotation angle of the second output shaft 12A according to the rotation angle of the first output shaft 11A in the present exemplary embodiment. FIG. 13 shows a curve 190 showing the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 100%. FIG. Is the same. A curve 192 showing the rotation angle of the second output shaft when the enlargement ratio is 50% and a curve 194 showing the rotation angle of the second output shaft 12A when the enlargement ratio is 0% are also shown in FIG. 10A. The same.

In FIG. 13,

curves

196 and 198 are added to FIG. 10A in addition to the

curves

190, 192 and 194.

Curves

196 and 198 are second output shaft rotation angle maps for interpolating the enlargement ratios of the

curves

190 and 192. As an example, a curve 196 indicates the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 90%. A curve 198 shows the rotation angle of the second output shaft 12A determined according to the first output shaft rotation angle θ _A when the enlargement ratio is 80%.

FIG. 14 shows an example of a change in the wiping range according to the enlargement ratio. In FIG. 14, the wiping range Z1 has an enlargement rate of 0%, the wiping range Z2 has an enlargement rate of 100%, the wiping range Z3 has an enlargement rate of 50%, and the wiping range Z4 has an enlargement rate of 90%. In this case, the wiping range Z5 indicates the case where the enlargement ratio is 80%. As shown in FIG. 14, water droplets are prevented from scattering outside the front passenger seat of the windshield glass 1 by changing the enlargement ratio according to the situation.

Hereinafter, control of the wiper system 100 according to the exemplary embodiment will be described. FIG. 15 is a flowchart illustrating an example of water droplet scattering prevention processing in the wiper system 100 according to the exemplary embodiment. In step 150, it is determined whether or not the wiper switch 50 is turned on.

If the determination in step 150 is affirmative, it is determined in step 152 whether or not a pedestrian or motorcycle has been detected in the left direction of the vehicle (outside the passenger seat). Since the detection method of a pedestrian or a two-wheeled vehicle is the same as that of 1st exemplary embodiment, detailed description is abbreviate | omitted. If the determination is negative in

steps

150 and 152, the process is returned.

If the determination in step 152 is affirmative, it is determined in step 154 whether or not the vehicle has been decelerated. There are various methods for determining whether or not the vehicle is decelerating. For example, when the brake pedal is depressed, it is determined that the vehicle is decelerating. Alternatively, it may be determined that the vehicle is decelerated based on the decrease amount of the vehicle speed detected by the vehicle speed sensor 92 per unit time, or a separate acceleration sensor (not shown) is provided, and the vehicle is decelerated based on the detection result of the acceleration sensor. May be determined.

If the determination in step 154 is affirmative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 166, and the second output shaft rotation of the curve 192 is performed during the backward movement. Using the angle map, the wiping operation is performed so that the enlargement ratio at the time of backward movement with respect to the enlargement ratio at the time of the previous forward movement is 50%, and the process is returned. When the vehicle decelerates, the vehicle is turned forward, so that water droplets on the vehicle roof flow down onto the windshield glass 1. Therefore, if the enlargement ratio of the passenger-side wiper arm 35 is large, there is a high possibility that water droplets are scattered on a pedestrian or the like existing outside the passenger seat. In such a case, the enlargement rate at the time of reverse movement with respect to the enlargement rate at the time of the previous forward movement is set to 50% or 50% or less as an example to prevent water droplets from being scattered to a pedestrian or the like. In addition, since the water droplet which flows down from the passenger seat side upper part of the windshield glass 1 is wiped off by the wiping operation | movement at the time of the outward movement which enlarged the expansion ratio, the visibility from a driver's seat is ensured.

It should be noted that the operation of the enlargement rate during forward movement 100% in step 166 and the enlargement rate 50% during backward movement with respect to the enlargement rate during the previous forward movement is executed at a predetermined number of reciprocations of 1 or more and the process is returned. . The number of reciprocations is arbitrary, but the number of times that water droplets on the windshield glass 1 can be effectively wiped is determined through experiments using actual machines. In

steps

158, 162, and 164, which will be described later, the wiping operation is performed a predetermined number of times of reciprocation, and the process is returned, but each time of reciprocation in

steps

158, 162, and 164 is effective for water droplets on the windshield glass 1. However, the number of times may be different from that in the case of step 166, and may be different in each of

steps

158, 162, and 164.

If the determination in step 154 is negative, it is determined in step 156 whether or not the vehicle speed is greater than or equal to a first predetermined value. As an example, the first predetermined value is 30 km / h. If the determination in step 156 is affirmative, the second output shaft rotation angle map of the curve 190 is used in step 158, the enlargement rate during the forward movement is 100%, and the enlargement during the backward operation with respect to the enlargement rate during the previous forward movement. The wiping operation is performed at a rate of 100%, and the process returns. If the vehicle speed is above a certain level, the water droplets on the windshield glass 1 and on the roof are blown backwards by the driving wind. This is because there is less risk of scattering.

If the determination in step 156 is negative, it is determined in step 160 whether or not the vehicle speed is greater than or equal to a second predetermined value. As an example, the second predetermined value is 10 km / h. If the determination in step 160 is affirmative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 162, and the second output shaft rotation of the curve 196 is performed during the backward movement. Using the angle map, for example, the wiping operation is performed so that the enlargement rate at the backward movement is 90% with respect to the enlargement rate at the previous forward movement, and the processing is returned.

If the determination in step 160 is negative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 164, and the second output of the curve 198 is performed during the backward movement. For example, the wiping operation is performed using the shaft rotation angle map so that the enlargement ratio at the backward movement is 80% with respect to the enlargement ratio at the previous forward movement, and the process is returned.

If the vehicle speed is high, water droplets on the windshield glass 1 and the roof are less likely to flow down on the windshield glass 1. Therefore, the higher the vehicle speed, the water droplets even if the enlargement ratio of the passenger side wiper arm 35 is increased. The risk of splashing outside the passenger seat is reduced.

Therefore, as described above, according to the present exemplary embodiment, when the vehicle decelerates, the enlargement ratio of the passenger-side wiper arm 35 during backward movement is minimized, and in other cases, the vehicle speed increases as the vehicle speed increases. By increasing the enlargement ratio of the passenger-side wiper arm 35 during reverse movement (in other words, as the vehicle speed of the vehicle decreases, the enlargement ratio of the passenger-side wiper arm 35 during backward movement is reduced) to the outside of the passenger seat Water droplets are prevented from being scattered and a wider range of the windshield glass 1 can be wiped off.

By controlling the enlargement ratio of the passenger-side wiper arm 35 more finely than in the first exemplary embodiment in accordance with the deceleration state of the vehicle or the vehicle speed, a wide range on the windshield glass 1 is obtained. The range can be effectively wiped off, and the scattering of water droplets to pedestrians and the like existing in the vicinity of the vehicle can be effectively suppressed.
In the exemplary embodiment, the wiping operation is performed so that the enlargement ratio of the passenger-side wiper arm 35 at the time of reverse movement is 100%, 90%, or 80% according to the vehicle speed. It is not limited to these. For example, the wiping operation may be performed so that the enlargement ratio of the passenger-side wiper arm 35 at the time of reverse movement is 95%, 90%, or 85% according to the vehicle speed.

[Third exemplary embodiment]
Subsequently, a third exemplary embodiment of the present disclosure will be described. Since the configuration of the wiper system according to the exemplary embodiment is the same as that of the wiper system 100 according to the first exemplary embodiment shown in FIGS. 1 to 9, detailed description thereof is omitted. In this exemplary embodiment, the enlargement rate during forward movement and the enlargement rate during backward movement are controlled according to the wiping speed, but the second output shaft rotation angle map of the second exemplary embodiment shown in FIG. Is used.

FIG. 16 is a flowchart illustrating an example of water droplet scattering prevention processing in the wiper system 100 according to the present exemplary embodiment. In step 600, it is determined whether or not the wiper switch 50 is turned on.

If the determination in step 600 is affirmative, it is determined in step 602 whether or not a pedestrian or two-wheeled vehicle is detected in the left direction of the vehicle (outside the passenger seat). Since the detection method of a pedestrian or a two-wheeled vehicle is the same as that of 1st exemplary embodiment, detailed description is abbreviate | omitted. If the determination is negative in

steps

600 and 602, the process is returned.

If the determination in step 602 is affirmative, the rotation speed of the first output shaft 11A is calculated from the rotation angle of the first output shaft 11A detected by the first absolute angle sensor 114 in step 604, and the calculated rotation speed is calculated. It is determined whether or not it corresponds to the high speed operation mode.

If the determination in step 604 is affirmative, a wiping operation is performed at an enlargement ratio of 100% using the second output shaft rotation angle map of the curve 190 during forward movement in step 606. For example, the enlargement ratio is 70% during backward movement. Using a second output shaft rotation angle map (not shown), a wiping operation is performed so that the enlargement ratio at the time of backward movement relative to the enlargement ratio at the time of the previous forward movement is 70%, and the process is returned. The greater the wiping speed of the front passenger side wiper blade 36, the easier the water droplets are scattered to the outside of the front passenger seat due to centrifugal force. In this exemplary embodiment, when the wiping speed is equivalent to the high-speed operation mode, it is possible to prevent water droplets from being scattered to pedestrians and the like by suppressing the enlargement rate at the backward movement relative to the enlargement rate at the forward movement. To do. In addition, since the water droplet which flows down from the passenger seat side upper part of the windshield glass 1 is wiped off by the wiping operation | movement at the time of the outward movement which enlarged the expansion ratio, the visibility from a driver's seat is ensured.

It should be noted that the operations of the forward movement enlargement ratio of 100% in step 606 and the backward movement enlargement ratio of 70% with respect to the previous forward movement enlargement ratio are executed at a predetermined number of reciprocations of 1 or more, and the process is returned. The number of reciprocations is arbitrary, but the number of times that water droplets on the windshield glass 1 can be effectively wiped is determined through experiments using actual machines. In

Steps

610 and 612, which will be described later, the wiping operation is performed for a predetermined number of reciprocations, and the process is returned. However, the number of reciprocations in

Steps

610 and 612 can effectively remove water droplets on the windshield glass 1. If there is, the number of times may be different from the case of step 606, and may be different in each of

steps

606, 610, and 612.

If the determination in step 604 is negative, it is determined in step 608 whether the rotation speed calculated from the rotation angle of the first output shaft 11A detected by the first absolute angle sensor 114 is equivalent to the low speed operation mode. If the determination in step 608 is affirmative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 610, and the second output shaft rotation of the curve 198 is performed during the backward movement. Using the angle map, for example, the wiping operation is performed so that the enlargement rate at the backward movement is 80% with respect to the enlargement rate at the previous forward movement, and the process is returned.

If the determination in step 608 is negative, the wiping speed of the passenger-side wiper blade 36 is considered to be equivalent to the intermittent operation mode, and the forward output in step 612 uses the second output shaft rotation angle map of the curve 190. Wiping operation is performed at an enlargement rate of 100%, and at the time of backward movement, using the second output shaft rotation angle map of the curve 196, for example, the enlargement rate at the time of backward movement is 90% with respect to the enlargement rate at the time of the previous forward movement. Take action and return processing. This is because if the wiping speed of the front passenger side wiper blade 36 decreases, the possibility of water droplets scattering outside the front passenger seat is reduced even if the enlargement ratio of the front passenger side wiper arm 35 is increased.

In the present exemplary embodiment, the enlargement ratio of the passenger-side wiper arm 35 at the time of forward movement is decreased as the wiping speed becomes higher such as the intermittent operation mode, the low speed operation mode, and the high speed operation mode. As the wiping speed of the passenger-side wiper blade 36 increases, the non-wiping range X becomes larger at the time of backward movement. However, if the wiping speed is faster, the wiping speed at the next forward movement can be quickly shifted. And since it wipes off with the expansion rate of 100% at the time of forward movement, the non-wiping range X can be wiped off effectively.

As described above, according to the present exemplary embodiment, by changing the enlargement ratio of the passenger-side wiper arm 35 during the backward movement according to the wiping speed of the passenger-side wiper blade 36, Water droplets can be prevented from being scattered and a wider range of the windshield glass 1 can be wiped off.
In the exemplary embodiment, the wiping operation is performed so that the enlargement ratio of the passenger-side wiper arm 35 during the backward movement is 90%, 80%, or 70% according to the wiping speed. However, it is not limited to these. For example, the wiping operation may be performed so that the enlargement ratio of the passenger-side wiper arm 35 during the backward movement is 90%, 85%, or 80% according to the wiping speed.

[Fourth Exemplary Embodiment]
Subsequently, a fourth exemplary embodiment of the present disclosure will be described. Since the configuration of the wiper system according to the exemplary embodiment is the same as that of the wiper system 100 according to the first exemplary embodiment shown in FIGS. 1 to 9, detailed description thereof is omitted. In the present exemplary embodiment, the enlargement ratio at the time of forward movement and the enlargement ratio at the time of backward movement are controlled according to the amount of water on the windshield glass 1, but as in the third exemplary embodiment described above, FIG. The second output shaft rotation angle map of the second exemplary embodiment shown in FIG.

FIG. 17 is a flowchart showing an example of water droplet scattering prevention processing in the wiper system 100 according to the present exemplary embodiment. In step 700, it is determined whether or not the wiper switch 50 is turned on.

If the determination in step 700 is affirmative, it is determined in step 702 whether or not a pedestrian or two-wheeled vehicle is detected in the left direction of the vehicle (outside the passenger seat). Since the detection method of a pedestrian or a two-wheeled vehicle is the same as that of 1st exemplary embodiment, detailed description is abbreviate | omitted. In the case of negative determination in

steps

700 and 702, the process is returned.

If the determination in step 702 is affirmative, in step 704, the amount of water on the windshield glass 1 is calculated from the state of attachment of water droplets detected on the windshield glass 1 detected by the rain sensor 76, and the calculated amount of water is the first threshold value. It is determined whether it is above. The calculated amount of water is, for example, a numerical value equivalent to one hour of rainfall. In this exemplary embodiment, as an example, when the amount of water on the windshield glass 1 corresponds to a moderate amount of rainfall equivalent to 10 mm in one hour of rainfall, an affirmative determination is made in step 704.

If an affirmative determination is made in step 704, the wiping operation is performed at an enlargement rate of 100% using the second output shaft rotation angle map of the curve 190 in the forward movement in step 706, and as an example, the enlargement rate is 70% in the backward movement. Using a second output shaft rotation angle map (not shown), a wiping operation is performed so that the enlargement ratio at the time of backward movement relative to the enlargement ratio at the time of the previous forward movement is 70%, and the process is returned. As the amount of water on the windshield glass 1 increases, water droplets are more likely to be scattered outside the passenger seat. In the present exemplary embodiment, when the amount of water is equal to or greater than the first threshold value, it is possible to prevent water droplets from scattering to pedestrians and the like by suppressing the enlargement rate at the time of backward movement relative to the enlargement rate at the time of forward movement. . In addition, since the water droplet which flows down from the passenger seat side upper part of the windshield glass 1 is wiped off by the wiping operation | movement at the time of the outward movement which enlarged the expansion ratio, the visibility from a driver's seat is ensured.

It should be noted that the operations of the forward movement enlargement ratio of 100% in step 706 and the backward movement enlargement ratio of 70% with respect to the previous forward movement enlargement ratio are executed at a predetermined number of reciprocations of 1 or more, and the process is returned. The number of reciprocations is arbitrary, but the number of times that water droplets on the windshield glass 1 can be effectively wiped is determined through experiments using actual machines. In

steps

710 and 712, which will be described later, the wiping operation is performed for a predetermined number of reciprocations, and the process is returned. However, each reciprocation in

steps

710 and 712 can effectively remove water droplets on the windshield glass 1. If so, the number of times may be different from that in step 706, and may be different in each of

steps

706, 710, and 712.

If the determination in step 704 is negative, it is determined in step 708 whether or not the amount of water on the windshield glass 1 is greater than or equal to the second threshold value. As an example, the second threshold value is an amount of water corresponding to weak rain of about 1 to 3 mm in one hour of rainfall.

If the determination in step 708 is affirmative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 710, and the second output shaft rotation of the curve 198 is performed during the backward movement. Using the angle map, for example, the wiping operation is performed so that the enlargement rate at the backward movement is 80% with respect to the enlargement rate at the previous forward movement, and the process is returned.

If the determination in step 708 is negative, the wiping operation is performed at a magnification of 100% using the second output shaft rotation angle map of the curve 190 during the forward movement in step 712, and the second output of the curve 196 is performed during the backward movement. Using the shaft rotation angle map, for example, the wiping operation is performed so that the enlargement ratio at the backward movement relative to the enlargement ratio at the previous forward movement is 90%, and the process is returned. This is because if the amount of water on the windshield glass 1 is small, the possibility of water droplets scattering outside the passenger seat is reduced even if the enlargement ratio of the passenger-side wiper arm 35 is increased.

In this exemplary embodiment, the enlargement ratio of the passenger-side wiper arm 35 at the time of forward movement is reduced as the amount of water on the windshield glass 1 is increased, thereby preventing water droplets from scattering to pedestrians and the like. As the amount of water on the windshield glass 1 increases, the non-wiping range X becomes larger at the time of backward movement, but at the next forward movement, wiping is performed at an enlargement rate of 100%, so that the non-wiping range X can be effectively wiped off. .

As described above, according to this exemplary embodiment, by changing the enlargement ratio of the passenger side wiper arm 35 during the backward movement according to the amount of water on the windshield glass 1, While preventing scattering, a wider range of the windshield glass 1 can be wiped off.
In the exemplary embodiment, the wiping operation is performed so that the enlargement ratio of the passenger-side wiper arm 35 during the backward movement is 90%, 80%, or 70% according to the amount of water on the windshield glass 1. However, the present disclosure is not limited to this. For example, depending on the amount of water on the windshield glass 1, the wiping operation may be performed so that the enlargement ratio of the passenger-side wiper arm 35 at the time of backward movement is 90%, 85%, or 80%.

In each of the exemplary embodiments of the present disclosure, the first output shaft 11A of the first motor 11 and the second output shaft 12A of the second motor 12 are controlled to be able to rotate forward and backward (reciprocating). It is not limited to. For example, one of the first output shaft 11A and the second output shaft 12A may rotate in one direction.

Note that each of the exemplary embodiments of the present disclosure causes the driver seat side wiper blade 18 and the passenger seat side wiper blade 36 to be turned upside down with respect to the upper turning positions P1D and P1P by the rotation of the first output shaft 11A of the first motor 11. Although it moved between position P2D and P2P, it is not limited to this. For example, the first motor 11 includes a “driver's seat side first motor” and a “passenger's seat side first motor”, and the driver seat side wiper blade 18 is moved down to the upper inversion position P1D by the rotation of the driver seat side first motor. The structure may be such that the passenger seat side wiper blade 36 is moved between the upper inversion position P1P and the lower inversion position P2P by moving between the inversion position P2D and rotation of the first passenger seat side motor.

In each of the exemplary embodiments of the present disclosure, the driver-side wiper blade 18 and the passenger-side wiper blade 36 have a structure that does not overlap in the vehicle width direction at the lower inversion positions P2D and P2P. It is not limited to. For example, the driver seat side wiper blade 18 side of the passenger seat side wiper blade 36 may be set longer. In other words, the length of the passenger seat side wiper blade 36 is set so that the driver seat side wiper blade 18 side of the passenger seat side wiper blade 36 overlaps the passenger seat side wiper blade 36 side of the driver seat side wiper blade 18. Also good. Thereby, when wiping the wiping range Z2 during the reciprocating motion, it is possible to reduce the non-wiping area that remains on the lower center side of the windshield glass.

In each of the exemplary embodiments of the present disclosure, the passenger-side wiper arm 35 (passenger-side wiper blade 36) is extended to the vicinity of the intermediate angle at the predetermined rotation angle of the first output shaft 11A, and the vicinity of the intermediate angle. The control for reducing the passenger-side wiper arm 35 (passenger-side wiper blade 36) is performed between the first rotation angle and the predetermined rotation angle, but the present invention is not limited to this. For example, when the passenger seat side wiper blade 36 wipes from the lower inversion position P2P toward the upper inversion position P1P (during forward wiping), the passenger seat side wiper arm 35 may be controlled to gradually extend.

In the exemplary embodiment, the exemplary embodiment using the rotation angle of the first output shaft 11A of the first motor 11 and the rotation angle of the second output shaft 12A of the second motor 12 has been described. Instead of this, the rotational position of the first output shaft 11A and the rotational position of the second output shaft 12A may be used.

In each of the exemplary embodiments of the present disclosure, the expansion of the wiping range is performed after one or more predetermined times, and then the process is returned. However, the present invention is not limited to this. For example, when the wiping range has been expanded a predetermined number of times of 1 or more and the dirt or the like of the non-wiping range X has not been removed, it is determined that the situation cannot be removed (freezing or clouding on the inner surface), You may control not to perform expansion of a period wiping range. By such control, since the expansion of the wiping range is not executed in a situation where removal is not possible even if the wiping range such as freezing or fogging of the inner surface is expanded, the uncomfortable feeling in the operation of the wiper device 2 can be suppressed.

In each exemplary embodiment of the present disclosure, the first motor 11 and the second motor 12 are controlled to wipe the wiping range Z2 in a situation where a wide field of view on the passenger seat side should be secured. An “automatic enlargement changeover switch” that can cancel the execution of the above may be separately provided. By providing the automatic enlargement changeover switch, the wiping range Z1 can be wiped without executing the enlargement of the wiping range even in a situation where a wide field of view on the passenger seat side should be secured. When the occupant of the vehicle 122 thinks that it is not necessary to expand the wiping range, the wiping range is not expanded (wiping of the wiping range Z2). The position where the automatic enlargement changeover switch is provided is not limited.
Note that in each of the exemplary embodiments of the present disclosure described above, the second motor 12 is controlled so as to suppress the enlargement rate at the time of reverse movement relative to the enlargement rate at the time of forward movement according to the vehicle speed, the wiping speed, and the amount of water. Explained the example. However, the present disclosure is not limited to this. For example, a mode may be provided in which the second motor 12 is controlled so that the enlargement rate during movement relative to the enlargement rate during movement depends on the conditions (vehicle speed, wiping speed, and water amount).

In each exemplary embodiment of the present disclosure, it is determined whether a pedestrian or a two-wheeled vehicle is detected in the left direction of the vehicle (outside the passenger seat) by the millimeter wave radar 102 or the in-vehicle camera 94 as the in-vehicle sensor. It was. However, the present disclosure is not limited to this. For example, it may be determined whether a pedestrian or a two-wheeled vehicle is detected in the left direction of the vehicle (outside the passenger seat) with an ultrasonic sensor such as an ultrasonic sonar.

The entire disclosure of Japanese Patent Application No. 2016-207845 is incorporated herein by reference.

All documents, patent applications, and technical standards mentioned in this specification are to the same extent as if each individual document, patent application, and technical standard were specifically and individually described to be incorporated by reference, Incorporated herein by reference.

Claims

A first drive source for wiping the wiper blade connected to the tip of the wiper arm by rotation of the first output shaft between two different inversion positions on the windshield;
A second drive source for operating a telescopic mechanism provided on the wiper arm by rotating a second output shaft synchronized with the drive of the first drive source to vary the wiping range of the windshield by the wiper blade;
A control unit that controls the first drive source and the second drive source so that the wiping range at the time of the return path wiping is smaller than the wiping range at the time of the forward path wiping;
A vehicle wiper device comprising:
The controller determines an enlargement ratio of each of the expansion / contraction mechanisms at the time of wiping the outward path and wiping the return path, and the first drive source and the second drive so that the expansion / contraction mechanism operates at the determined enlargement ratio. The vehicle wiper device according to claim 1, wherein the power source is controlled.
A vehicle speed information detecting unit for acquiring vehicle speed information;
3. The vehicle wiper according to claim 1, wherein the control unit determines an enlargement rate at the time of the forward wiping and an enlargement rate at the time of the return wiping based on the speed information detected by the vehicle speed information detection unit. apparatus.
When the vehicle decelerates based on the speed information detected by the vehicle speed information detection unit, the control unit reduces the enlargement rate during the return pass wiping with respect to the enlargement rate during the forward pass wiping. Item 4. The vehicle wiper device according to Item 3.
The control unit, based on the speed information detected by the vehicle speed information detection unit, reduces the enlargement rate during the return pass wiping with respect to the enlargement rate during the forward pass wiping as the vehicle speed is lower. The vehicle wiper device according to 3 or 4.
A first rotation angle detector for detecting a rotation angle of the first output shaft;
The control unit determines the enlargement rate during the forward wiping and the enlargement rate during the return wiping according to the rotation speed of the first output shaft calculated based on the rotation angle detected by the first rotation angle detection unit. The vehicle wiper device according to claim 1, wherein the vehicle wiper device is determined.
The vehicle wiper device according to claim 6, wherein the control unit decreases the enlargement ratio at the time of the return path wiping with respect to the enlargement ratio at the time of the forward path wiping as the rotation speed of the first output shaft increases.
A water droplet detection unit for detecting water droplets adhering to the windshield,
The said control part determines the expansion rate at the time of the said outward wiping, and the expansion rate at the time of the said return wiping according to the amount of water on the said windshield calculated based on the detection result of the said water droplet detection part. The vehicle wiper device described in 1.
The vehicle wiper device according to claim 8, wherein the control unit reduces the enlargement ratio at the time of the backward wiping with respect to the enlargement ratio at the time of the outward wiping as the amount of water increases.
It further comprises an in-vehicle sensor that detects pedestrians and motorcycles,
The control unit according to any one of claims 1 to 9, wherein when the on-board sensor detects a pedestrian or a two-wheeled vehicle, the control unit reduces an enlargement rate at the time of the backward wiping to be smaller than an enlargement rate at the time of the outward wiping. Vehicle wiper device.
A first drive source actuating step for wiping the wiper blade connected to the tip of the wiper arm by rotation of the first output shaft of the first drive source between two different inversion positions on the windshield;
A second oscillating mechanism provided on the wiper arm is operated by rotation of the second output shaft of the second drive source synchronized with the drive of the first drive source to vary the wiping range of the windshield by the wiper blade. A drive source actuation step;
A control step of controlling the first drive source and the second drive source so that the wiping range at the time of the return path wiping is smaller than the wiping range at the time of the forward path wiping;
A control method for a vehicle wiper device.
The control step determines an enlargement ratio of each of the expansion / contraction mechanisms at the time of wiping the outward path and wiping the return path, and the first drive source and the second drive so that the expansion / contraction mechanism operates at the determined enlargement ratio. The control method of the wiper device for vehicles according to claim 11 which controls a source.
13. The control step of determining an enlargement rate at the time of the forward wiping and an enlargement rate at the time of the return wiping based on speed information detected by a vehicle speed information detection unit that acquires vehicle speed information. A control method for a vehicle wiper device according to claim 1.
When the vehicle decelerates based on the speed information detected by the vehicle speed information detection unit, the control step reduces the enlargement rate during the return pass wiping with respect to the enlargement rate during the forward pass wiping. Item 14. A method for controlling a vehicle wiper device according to Item 13.
The control step, based on speed information detected by the vehicle speed information detection unit, lowers the enlargement ratio at the time of the return pass wiping with respect to the enlargement ratio at the time of the forward pass wiping as the speed of the vehicle is lower. 15. A method for controlling a vehicle wiper device according to 13 or 14.
In the control step, the enlargement rate during the forward path wiping and the return path wiping are determined according to the rotation speed of the first output shaft calculated based on the rotation angle of the first output shaft detected by the first rotation angle detection unit. The method of controlling a vehicle wiper device according to claim 11 or 12, wherein an enlargement ratio at the time is determined.
The method of controlling a vehicle wiper device according to claim 16, wherein the control step decreases the enlargement ratio at the time of the backward wiping with respect to the enlargement ratio at the time of the forward wiping as the rotation speed of the first output shaft increases.
In the control step, the enlargement rate at the time of the forward wiping and the enlargement at the time of the return wiping are calculated according to the amount of water on the windshield calculated based on the detection result of the water droplet detection unit that detects the water droplets adhering to the windshield. The vehicle wiper device control method according to claim 11 or 12, wherein the rate is determined.
19. The control method for a vehicle wiper device according to claim 18, wherein the control step decreases the enlargement rate at the time of the return pass wiping with respect to the enlargement rate at the time of the outward pass wiping as the amount of water increases.
The control step according to any one of claims 11 to 19, wherein, when a pedestrian or a two-wheeled vehicle is detected by an in-vehicle sensor, the enlargement ratio at the time of the backward wiping is smaller than the enlargement ratio at the time of the forward wiping. A control method for a vehicle wiper device.