JPS5959545A - Windshield wiper controller for vehicle - Google Patents

Abstract

PURPOSE:To prevent the occurrence of dry wiping at the initial operation of a windshield wiper as well as of the unwiped part left after stoppage of the wiper, by making a windshield wiper motor drivable only during operation of a hydraulic pressure detecting device detecting the hydraulic pressure of a detergent solution sprayed out of a washer nozzle. CONSTITUTION:In a state of an ignition switch 4 being turned on, when a select push switch for a washer motor 20d in a wiper switch 20 at the front side is pushed, a washer pump motor 7 operates whereby a detergent solution out of a washer tank is spouted onto a wiping glass surface from a washer nozzle. At this time, a washer switch 21 is turned on by dint of the injection pressure of the detergent solution, operating a windshield wiper motor M1, and thereby a windshield wiper is set in motion at low speed together with the injection of the said detergent solution. Next, when the said push switch is pressed whereby its operation is stopped, the washer pump motor 7 comes to a stop and the windshield wiper motor M1 is as well stopped as soon as the injection pressure of the detergent solution becomes below the specified value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wiper control device for a vehicle that drives a wiper motor in conjunction with a cleaning liquid injection operation of a wiper switch.

Conventionally, as a dual-use wiper control device, there is one shown in FIG. 1, for example.

In Fig. 1, 1 is a front wiper switch represented by a switch matrix, and the front wiper switch can switch between off mode 1a, low speed wiper mode lb, and high speed wino (mode IC and washer interlocking mode 1d). Here, the washer interlocking mode 1d can be switched by pressing the button switch which is a non-locking mechanism on the front side switch 1, but press this button switch with the ignition switch 40 on. Then, battery 2 is supplied to the windshield motor N (,) of the wiper motor unit 6 via the switch 3, ignition switch 4, and fuse 5, and at the same time, it is supplied to the washer pump motor 7 of the wash tank containing the cleaning liquid Power is similarly supplied to the washer tank. Therefore, the cleaning liquid from the washer tank pressurized by the washer bottle motor 7 passes through the washer tube and is sprayed from the washer nozzle onto the wiping glass m'i of the wind seal. , the cleaner will start operating and wash off the dirt on the witseal glass.Then, the front panel 1
When you stop pressing the top switch on the wiper switch 1, the front wiper switch 1 switches to the off mode 1a, the power supply to the washer pump motor 7 is cut off, and the washer pump motor 7 is turned off ( At the same time, the changeover switch 6a of the wiper motor unit 6, which had been switching between operating contact A and stop contact B according to the wiper operation, switches from operating contact A to stop contact B when the wiper returns to its initial position. In the evening, the power supply to the wiper motor M is cut off and the wiper operation stops.

In addition, set the front wiper switch 1 to low speed wiper mode 1.
When switching to b and high-speed wiper mode 1C, the washer pump motor 7 does not operate, and the low-speed wiper operates and
Only high-speed wiper operation is performed.

In addition, in this conventional example, the rear window wiper control device also contains liquid, and the rear window wiper control device 4
is the same as the front side, off-mo 1-' 10 a +
Wiper mode 101), washer interlocking mode IOC
A rear wiper motor unit 8 includes a rear wiper switch 10 that performs switching, a changeover switch 8a that performs a switching operation between an operating contact A and a stop contact B according to rear wiper motor M2 and rear wiper operation, and a rear washer pump motor 9. The operation 1 is the same as the front side, and when the rear wiper switch 10 is switched to the washer interlock mode 10c, power is supplied to the rear wiper motor M2 and the rear washer pump motor 9 via the fuse 5b. When the rear wiper motor Mt and the rear washer pump motor 9 operate simultaneously, and then the rear side 7172 inch 100 washers interlock mode IOC is canceled and switched to the off mode 10a, the rear washer pump motor 9 stops operating and When the rear wiper returns to its initial position, the changeover switch 8a switches to the stop contact B, and the rear wiper motor M stops.

By the way, in the above-mentioned vehicle wiper control device, for example, on the front side, the washer pump motor 7 and the wiper motor M are operated simultaneously by switching the washer interlocking motor 1d of the front wiper switch 1. Therefore, even in Europe (where the cleaning liquid injection operation and wiper operation are performed separately), the wind seal can now be cleaned with a one-touch operation.

However, the washer tube that guides the washer fluid from the washer tank containing the cleaning fluid to the washer nozzle usually runs for a certain length of time, so the washer pump motor 7
Even if the wiper motor M and the wiper motor M are operated at the same time, the jetting of the cleaning liquid from the washer nozzle is delayed relative to the wiper operation, so the wiper blade scrapes the glass surface when the glass surface is dry at the beginning of the wiper operation. If the washer pump motor 7 is stopped at the timing when the wiper reaches its initial position, there is a risk of scratching the wiper blade or glass surface.
Even though the wiper is stopped, the cleaning liquid flows down from the washer nozzle due to the residual pressure in the washer tube, resulting in a problem in that cleaning liquid remains on the glass surface.

The present invention has been made in view of the above, and provides a wiper control device for a vehicle that drives a wiper motor in conjunction with a cleaning liquid injection operation of a wiper switch, which performs dry wiping at the initial stage of wiper operation and wipes cleaning liquid when wiper operation is stopped. In order to prevent residue, the washer nozzle is equipped with a hydraulic pressure detection means that operates based on the hydraulic pressure of the cleaning fluid sprayed from the washer nozzle, and the wiper motor can only be driven while this hydraulic pressure detection means is in operation. It is.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 2 is a circuit diagram showing one embodiment of the present invention.

First, to explain the configuration, a wiper motor unit 6 consisting of a wiper motor M1 and a changeover switch 6a that performs a switching operation between an operating contact A and a stop contact B according to wiper operation, and a washer pump motor 7 are respectively conventional devices shown in FIG. Fusible link 3. It is connected to the battery 2 via an ignition switch 4 and a fuse 5a. 20 is the front wiper switch represented by a switch matrix (off mode)
20a, low speed wiper motor 20b high speed wiper motor)
"20c" and "washer mode 2C1d" mode switching is possible.The front side wiper switch 20b is the off-mode wiper switch 20a that connects the low duty ground side energized line (L) of the energized wiper motor N1. to the changeover switch 6a. This is set to low speed wiper mode 20b,
And when switching to the high speed wiper mode 20c, the low duty ground side energizing line (L) and the high speed ground side energizing line (H) of the wiper motor M are connected to the respective ground lines as in the conventional device. It has become.

On the other hand, in the washer mode 20d of the 7471-inch 20 on the front side, the ground side energizing line of the washer pump motor 7 is connected to the ground line so that the washer pump motor 7 can be supplied with power from the battery 2. Furthermore, a washer detection switch 21 is provided at the tip of the washer nozzle and is turned on when the injection pressure of the cleaning liquid from the washer nozzle exceeds a predetermined level.
is the low-speed ground side energizing line (IL) of wiper motor ■1.
) and the ground line? 2 iQ has been done.

Similarly to the front side, the rear wiper control device also includes a rear wiper motor unit 8 consisting of a rear wiper motor M, a changeover switch 8a that switches between operating contact A and stop contact B according to rear wiper operation, and a rear washer pump. The motor 9 is connected to the battery 2 via the fusible link 3, the ignition switch 4, and the fuses 5b-e, respectively, and the υ′ blue IP switch 30
However, in the off mode 30a, the ground side energized line of the rear wiper motor M2 is connected to the changeover switch 8a, in the wiper mode 30b, the ground side energized line of the rear wiper motor M2 is connected to the earth line, and further, in the washer mode 30c, the rear The earth side energizing line of the washer pump motor 9 and the earth line are connected. A rear washer detection switch 31 is provided at the tip of the rear washer nozzle and is turned on when the cleaning liquid from the rear washer nozzle is injected at a predetermined pressure or higher. It is connected to the.

Next, I will explain the effect.

Here, perform the same operation as the wiper control device d for the front side and the rear 1111.Press the button for switching the washer mode 20d on the front side: L switch ☆ When pressed, the switch from the wiper controller 2 to the washer pump motor 7... ,
Once the power is supplied, the washer pump motor 7 is adjusted to 11.
The cleaning liquid from the soaker tank passes through the washer mode and is sprayed from the washer nozzle onto the wiped glass surface of the wind seal.

Power is supplied to the washer detection switch 21, the wiper motor M, and the wiper motor M by the jetting pressure of the cleaning liquid from the washer nozzle, and the wiper performs a low-speed wipe operation as the cleaning liquid is jetted from the washer nozzle.

On the other hand, when you stop pressing the button switch for washer mode 20d in the float toy 1 river wiper inch 2o, the front wiper switch 20 switches to the off mode 20a, and the washer pump motor 7
The power supply to the washer pump motor 7 is cut off, and the operation of the washer pump motor 7 is stopped. However, the washer detection switch 21 is activated by the jetting pressure of the cleaning fluid that continues to be jetted due to the residual pressure in the washer tube connecting the washer tank and the washer nozzle. It remains on and wiper operation continues. Then, when the washer nozzle almost no longer sprays the cleaning fluid and the jetting pressure of the cleaning fluid drops below a predetermined value, the washer detection switch 21 is turned off and the front side 7471 inch 20 off mode 20. Accordingly, when the wiper returns to its initial position, the changeover switch 6a switches to the stop contact B, and the wiper motor M stops.

The rear wiper control device also has the same effect as the front wiper control device by operating the rear washer detection switch 31, which is turned on by the injection pressure of cleaning liquid injected from the rear washer nozzle at a predetermined level or higher.

As described above, in this embodiment, the wiper is operated only when the cleaning liquid sprayed from the washer nozzle has a predetermined injection pressure or higher, so even if the spraying of the cleaning liquid from the washer nozzle is delayed, the wiper does not close the width seal. Dry wiping can be prevented, and even if the cleaning liquid continues to be sprayed from the washer nozzle due to the residual pressure in the washer tube after the washer pump motor 7 is stopped, no cleaning liquid remains.

As explained above, according to the present invention, the configuration is
In a vehicle wiper control device that drives a wiper motor in conjunction with the cleaning fluid injection operation of a wiper inch, a washer nozzle is provided with a fluid pressure detection means that is activated by the fluid pressure of the cleaning fluid that can be completely sprayed from the washer nozzle. Since the wiper motor can be driven only while the detection means is in operation, wiper operation 1 is performed while cleaning liquid is actually being sprayed from the washer nozzle. It is possible to prevent cleaning liquid from being left unwiped when the operation is stopped.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional vehicle wiper control device;
FIG. 2 is a circuit diagram showing one embodiment of the present invention. 1.20...Front side 7471 inches 2...Battery 3...Hysiful link 4...
Ignition switch 5a, 5b... Fuse 6... Wiper motor unit 6a... Changeover switch 7... Washer pump motor 8... Rear wiper motor unit 8a... Changeover switch 9... Rear washer pump Motor 10.30...Rear side 7472 inches 21...Washer detection switch 31...Rear washers detection switch M,...Wiper motor M,...Rear windshield motor patent applicant Nissan Motor Co., Ltd.

Claims (1)

[Claims] A wiper control device for a vehicle that drives a wiper motor in conjunction with a cleaning fluid injection operation of a wiper switch includes a fluid pressure detection means that is provided in a washer nozzle and is activated by the fluid pressure of a cleaning fluid injected from the washer nozzle; A wiper control device for a vehicle, comprising wiper drive means that enables driving of the wiper motor only while the pressure detection means is in operation.