KR100588871B1 - Washer liquid injection system for vehicle - Google Patents

Abstract

The present invention relates to a washer fluid injector for a vehicle. The unit (ETACS) detects the direction of movement of the wiper blade from the stop switch, and then selectively opens the washer fluid sent to the nozzle tip pair of the injection nozzle to one side in accordance with the direction of movement of the wiper blade. The present invention relates to a washer liquid injector apparatus capable of controlling washer liquid injection direction, which solves a problem in which the washer liquid injected in the opposite direction to the driving direction obscures the driver's field of view and the problem in which the washer liquid was unnecessarily wasted. In particular, in the present invention, by simply adding two terminals to the existing stop switch as a wiper moving direction detecting means for determining the washer liquid injection direction, it is possible to control the washer liquid injection direction without installing a separate sensor. The use of a simple sensing structure that is configurable and less prone to errors results in increased reliability.

Vehicle, washer liquid injector, wiper, wiper motor, worm wheel, turntable, fixed terminal, ETACS, injection nozzle, magnetic valve, injection direction control

Description

Washer liquid injection system for vehicle             

1 is a front view showing a conventional wiper device,

Figure 2 is a front view showing the operating state of the conventional wiper arm-mounted injection nozzle,

3 is a view showing the terminal configuration and etax of the stop switch used in the washer liquid injector of the present invention,

4a and 4b is a state diagram showing a connection state for each fixed terminal of the stop switch used in the washer liquid injector of the present invention,

Figure 5a is a state diagram showing the washer liquid injection state and the operation state of the magnetic valve when the wiper blade is advanced in the washer liquid injection device of the present invention,

Figure 5b is a state diagram showing the washer liquid injection state and the operating state of the magnetic valve at the return of the wiper blade in the washer liquid injection device of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: injection nozzle 11: housing

12: nozzle tip 13: magnetic valve

20: control unit 100: windshield glass

110: wiper device 120: wiper blade

130: wiper arm 140: stop switch

141: rotating body 142: mobile terminal

143: stop terminal 144: first fixed terminal

145: second fixed terminal

The present invention relates to a washer fluid injector for a vehicle, and the control unit (ETACS) detects the direction of movement of the wiper blade from the stop switch, and then transfers the washer fluid to the nozzle tip pair of the injection nozzle to one side according to the traveling direction of the wiper blade. By selectively opening only the washer fluid to be sprayed only in the direction of movement of the wiper blade, the washer liquid spraying direction control solves the conventional problem that the washer fluid sprayed in the opposite direction of the driving direction obstructs the driver's field of view and the problem in which the washer liquid was unnecessarily wasted. A vehicle washer fluid injector is possible.

In general, when driving a vehicle, it is very important to secure the front field of view, and in order to secure such a front field of view, the vehicle has to remove foreign substances adhering to the surface of the windshield glass. In order to ensure it, the wiper apparatus as shown in the attached FIG. 1 and FIG. 2 is provided.

The wiper device 110 transmits a rotational motion generated from a wiper motor (not shown) to the wiper arm 130 via a wiper linkage system (not shown), and by this wiper arm 130. The wiper blade 120 is configured to wipe the glass 100 by reciprocating left and right in a predetermined wiping section.

On the other hand, in order to more easily remove the foreign matter in the process of cleaning the surface of the windshield glass, there is provided an injection nozzle for receiving the washer liquid from the tank in which the washer liquid is stored and sprayed toward the surface of the windshield glass.

Usually, in the case of a passenger car, a washer liquid injection nozzle is provided in the bonnet.

However, in the case of a commercial vehicle such as a truck or a bus, the injection nozzle 10 is mounted on the wiper arm 130 as shown in FIG. 2, which is different from a passenger car because the truck or bus does not have a bonnet and thus the injection nozzle. Because it is a structure that is difficult to install.

In the conventional commercial vehicle washer fluid injector including the wiper arm-mounted jet nozzle 10, the jet nozzle 10 is configured to jet the washer fluid regardless of the moving direction of the wiper blade 120.

That is, the injection nozzle 10 is configured to simultaneously spray the washer liquid before and after the moving direction of the wiper blade 120 (to the left and right on the wiper blade length).

As a result, as the washer liquid is injected in the opposite direction as described above, the washer liquid sprayed toward the traveling direction of the wiper blade 120 is immediately wiped, but the washer liquid sprayed to the opposite side is winded before the wiper blade 120 returns and wipes again. It remains on the shielded glass 100 to obstruct the driver's vision while driving.

In addition, there was a problem in that the washer liquid was sprayed simultaneously to both sides irrespective of the moving direction of the wiper blade 120 to waste the washer liquid unnecessarily.

Therefore, the present invention is invented to solve the above problems, the control unit (ETACS) detects the direction of movement of the wiper blade from the stop switch, and then the washer liquid sent to the nozzle tip pair of the injection nozzle of the wiper blade By selectively opening only one side according to the traveling direction so that the washer fluid is sprayed only in the traveling direction of the wiper blade, the conventional problem that the washer fluid sprayed in the opposite direction of the driving direction obscured the driver's field of view and the washer fluid was unnecessarily wasted It is an object of the present invention to provide a washer liquid injector capable of controlling a washer liquid injection direction.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a washer liquid injector comprising a spray nozzle mounted on a wiper arm and configured to spray the washer liquid provided from the washer liquid tank back and forth in a wiper traveling direction through respective pairs of nozzle tips arranged on left and right sides.

A magnetic valve mounted in the housing of the injection nozzle to selectively open the flow of the washer fluid to only one of the two left and right nozzle tip pairs; A sensing unit configured to further install two fixed terminals selectively connected to the moving terminals of the rotating body according to the advance and return of the wiper to the stop switch installed in the wiper motor; The control unit for receiving the connection signal output from each fixed terminal of the sensing unit to determine the direction of the wiper blade and outputs a signal for position control of the magnetic valve, further comprising a washer fluid only toward the direction of travel of the wiper blade Characterized in that it can be sprayed.

Particularly, one of the two fixed terminals of the sensing unit is installed at a position near the stop terminal in the rotational direction of the rotating body so that the mobile terminal is connected at the position of the rotating body corresponding to the initial stage of the wiper forward, and the other one 180 ° direction And the mobile terminal is connected at the position of the rotating body corresponding to the initial stage of the wiper return.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The washer liquid injector provided in the present invention basically includes a pumping means for supplying a washer liquid, a storage means for storage, and the like, and an operation for washer liquid injection may be performed by operating an operation switch.

The washer fluid injector of the present invention senses the moving direction of the wiper blade and then selectively opens (or closes) the washer fluid sent to each nozzle tip pair of the left and right sides (based on the wiper blade length direction) of the spray nozzle and moves toward the direction of the wiper blade. It consists of a system capable of spraying washer fluid only.

In particular, the washer liquid injector of the present invention is configured to use a stop switch installed in the wiper device as a means for detecting the direction of movement of the wiper blade.

3 is a view illustrating the terminal configuration and etax of the stop switch used in the washer liquid injector of the present invention, and FIGS. 4A and 4B are the washer liquid injector of the present invention. It shows the connection state for each fixed terminal of the stop switch used in.

In addition, Figure 5a is attached to the washer liquid injection state and the operation state of the magnetic valve when the wiper blade is advanced in the washer liquid injector of the present invention, Figure 5b is the washer liquid injection state and magnetic at the return of the wiper blade in the washer liquid injector of the present invention It shows the operation status of the valve.

The spray nozzle 10 applied to the washer fluid injector of the present invention is a wiper arm-mounted type, and a total of four nozzle tips 12 disposed two at the left and the right side based on the length of the wiper arm 130 (or the wiper blade). (Two nozzle tip pairs), and two nozzle tips constituting each nozzle tip pair on the left and right sides are arranged back and forth to spray the washer fluid in opposite directions.

The washer fluid injector of the present invention is configured such that the washer fluid is sprayed only to a selected pair of two pairs of nozzle tips 12 on the left and right sides of the injection nozzle 10, and in particular, in the direction in which the wiper blade 120 proceeds. The washer liquid is configured to be injected.

To this end, the wiper travel direction must be sensed. In the present invention, the stop switch 140 installed in the wiper motor is used as a means for detecting the wiper travel direction.

In a typical wiper device, even if the wiper switch is turned off during the wiper operation, the wiper motor is additionally operated for a predetermined time so that the wiper arm stops at the correct parking position, where the stop position of the wiper arm, that is, the lower limit position, is used to detect the wiper arm. The stop switch is provided as a means, which is briefly described as follows.

The motor shaft of the wiper motor used in the wiper device is equipped with a worm, and the worm wheel is rotated while the worm is engaged with the worm wheel. The moving direction of the wiper blades is reversed every 1/2 turn (every 180 °).

The worm wheel (not shown) is rotated by being installed integrally with the rotating body 141 as shown in Figure 3, the stop terminal 143, which is a fixed terminal is installed around the rotating body 141, The rotating body 141 is provided with a worm wheel corresponding to the lower wiper position and a moving terminal 142 connected to the stop terminal 143 at the rotating position of the rotating body.

Therefore, when the stop terminal 143 and the mobile terminal 142 are connected, the wiper stop position, that is, the wiper lower limit position (see FIG. 3), and the mobile terminal 142 in the state in which the rotating body 141 is rotated. Is at the 180 ° direction from the stop terminal 143, which is the upper limit of the wiper.

Of course, during the rotation of the whole 141 in which the mobile terminal 142 moves to the 180 ° direction from the stop terminal 143, the wiper advances, and the mobile terminal moves back to the stop terminal 143 from the 180 ° position. During the rotation of the rotating body 141, the wiper returns.

In the present invention, by installing two fixed terminals (144, 145) in addition to the stop switch 140, the direction of movement of the wiper according to the connection state between the two newly added fixed terminals (144, 145) and the mobile terminal (142) It is supposed to be detected.

That is, as shown in Figure 3, one of the two fixed terminals (hereinafter referred to as the first fixed terminal; 144) is installed near the stop terminal 143 in the rotation direction of the rotating body 141, and the other (hereinafter referred to as 145) is installed in the 180 ° direction.

4A illustrates a state in which the first fixed terminal and the mobile terminal are connected at the initial wiper advance, and FIG. 4B illustrates a state in which the second fixed terminal and the mobile terminal are connected at the initial wiper return.

On the other hand, the control unit (ETACS) 20 is connected to the first and second fixed terminals (144, 145), based on the connection signal input from each of the fixed terminals (144, 145), the first fixed terminal 144 as shown in Figure 4b ) And the mobile terminal 142 are connected to determine the initial time of the wiper forward operation in which the wiper blade 120 moves from the lower limit position to the upper limit position, and outputs a control signal for spraying the washer fluid in the wiper forward direction.

And, when the second fixed terminal 145 and the mobile terminal 142 is connected as shown in Figure 4c the wiper blade 120 is moved to the initial time of the wiper return operation to move from the upper limit position to the lower limit position. In response, the control signal for ejecting the washer liquid in the wiper return direction is output.

As such, the control unit 20 is based on the connection signal transmitted from the fixed terminals 144 and 145 every 1/2 rotation of the rotating body 141, and when the wiper blade 120 is advanced and It judges when it returns and controls the direction of injection of the washer liquid.

As a means for determining the spray direction of the washer liquid, a magnetic valve 13 is provided.

As shown in FIGS. 5A and 5B, the magnetic valve 13 is mounted in the housing 11 of the injection nozzle 10 and moves within the housing 11 while being moved under the control of the control unit 20. By opening one of the two washer fluid passages (relatively the other is closed), the washer liquid can be selected and moved to either of the left and right nozzle tip 12 pairs.

The control unit (ETACS) 20 for controlling the magnetic valve 13 for the selective spraying of the washer liquid has a control method of sensing an output of the rotating plate 141 and outputting an electrical application signal to the magnetic valve 13. As described above, after determining the moving direction (forward or return) of the wiper blade 120 by receiving the connection signal of the fixed terminal input according to the rotational position of the rotating plate 141, the magnetic valve 13 is applied according to the determination result. To be moved to a position.

For example, FIG. 5A illustrates the advancement of the wiper blade 120. The control unit 20 that receives the connection signal between the first fixed terminal 144 and the mobile terminal 142 of the rotating body 141 is Thereafter, the magnetic valve 13 is moved to the left side (down side of the figure), and the magnetic passage 13 is opened to the right side so that the washer fluid can be sent to the pair of nozzle tips 12 disposed to the right side (upper side of the figure). And the left passage is closed, so that the washer fluid can be sprayed in the forward direction (upward direction) of the wiper blade 120.

On the other hand, Figure 5b shows the return time of the wiper blade 120, the control unit 20 receiving the connection signal between the second fixed terminal 145 and the mobile terminal 142 of the rotating body 141 is then magnetic The valve 13 is moved to the right, and the left passage is opened and the right passage is closed so that the washer fluid can be sent to the pair of nozzle tips 12 on which the magnetic valve 13 is disposed to the left. 120 can be injected in the return direction.

As described above, according to the washer fluid injector according to the present invention, the control unit (ETACS) detects the moving direction of the wiper blade from the stop switch pre-installed in the wiper motor, and then the washer fluid sent to the nozzle tip pair of the injection nozzle. Is selectively opened to one side in accordance with the moving direction of the wiper blade so that the washer fluid is sprayed only in the traveling direction of the wiper blade, so that the washer fluid sprayed in the opposite direction of the moving direction obscures the driver's field of vision and the washer liquid is unnecessary. This can solve the problem.

In particular, by simply adding two terminals to the existing stop switch as a wiper moving direction sensing means for determining the washer liquid injection direction, it is possible to control the washer liquid injection direction without installing a separate sensor, and thus it is possible to configure at low cost. Therefore, manufacturing cost can be lowered and reliability can be improved by using a simple sensing structure with less error probability.

Claims (2)

delete A spray nozzle mounted on the wiper arm and configured to spray the washer fluid provided from the washer fluid tank through the nozzle tip pairs disposed on the left and right sides, respectively, in the wiper traveling direction, and mounted in the housing of the spray nozzle to control the flow of the washer fluid. A magnetic valve that selectively opens to either of the two nozzle tip pairs, and two fixed terminals to be selectively connected to the moving terminal of the rotor according to the advance and return of the wiper to the stop switch installed in the wiper motor. And a control unit configured to receive a connection signal output from each fixed terminal of the sensing unit and determine a moving direction of the wiper blade to output a signal for position control of the magnetic valve. Washer fluid for vehicles which can spray washer fluid only in the direction In the injector, One of the two fixed terminals of the sensing unit is installed at a position near the stop terminal in the rotational direction of the rotating body so that the mobile terminal is connected at the position of the rotating body corresponding to the initial stage of the wiper forward, and the other one is installed at the 180 ° direction. And the mobile terminal is connected at the position of the rotor corresponding to the initial stage of the wiper return.

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