KR19980015925A - Variable wiper operating device for spraying washer liquid - Google Patents

Abstract

The present invention relates to a wiper operating device, which has a problem in that the wiper is always operated at a low speed for a predetermined number of times regardless of the type of dirt adhering to the window while the washer switch is being pressed, The variable wiper operating device according to the present invention can variably control the value of the variable resistor R1 provided in the ECU 40 of the vehicle in accordance with the operating time of the washer switch 12, So that it is possible to operate the wiper for a suitable time during the operation of the washer switch 12 according to the kind of dirt on the windshield of the vehicle to secure the visibility of the driver, have.

Description

Variable wiper operating device for spraying washer liquid

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a wiper switch for a vehicle, and more particularly, to a variable wiper operating apparatus for spraying a washer fluid that variably controls the operation of the wiper according to the operation time of the washer switch when the washer liquid is sprayed.

Generally, a wiper device provided in a vehicle has four-stage adjustment of HIGH (high speed), LOW (low speed), INT (intermittent operation) and OFF (stop) (Not shown) closely attached to the windshield of the vehicle by moving the wiper switch 11 having the function to secure the view of the driver. Also, even in the case of a clear day, the washer liquid is sprayed onto the windshield of the vehicle while the washer switch 12 of the wiper operating lever 10 is pressed, and the wipers are moved to the left and right for a predetermined time to remove dirt adhering to the windshield.

However, conventionally, there is a problem that the wiper is always operated at a low speed for a predetermined number of times regardless of the kind of dirt stuck to the windshield while the washer switch is pressed, so that the dirt having high adhesive strength can not be cleaned properly.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a variable resistance device, which comprises a resistance R1 provided in an ECU of a vehicle at the time of operation of a washer switch and variably controls the operation of the wiper according to the operation time of the washer switch And a wiper operating device for supplying the washer fluid.

1 is an operation reference diagram of a wiper switch lever provided in a conventional vehicle,

FIG. 2 is a schematic circuit diagram of a variable wiper operating device for spraying washer fluid according to the present invention.

DESCRIPTION OF THE REFERENCE NUMERALS

10: wiper operating lever 11: wiper switch 12: washer switch 13: wiper motor 14: washer motor 20: cam plate 21: cam contact 30: ignition switch 40: ECU 41:

According to an aspect of the present invention, there is provided a wiper device including a wiper switch for determining an operation state of a wiper, a washer switch for determining operation of a washer motor, and a fixed resistor, a variable resistor, a capacitor, a transistor, a relay and a switch A wiper motor for controlling the operation speed of the wiper according to the control of the wiper switch and the ECU, and a control unit for controlling the wiper motor according to the control of the washer switch and the ECU And a washer motor for spraying the washer fluid onto the windshield.

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

The control of the wiper uses a ferrite magnet type DC motor as the wiper motor 13, and the rotation speed of the DC motor is inversely proportional to the counter electromotive force of the armature generated during rotation. Two types of rotational speeds are obtained by increasing or decreasing the number of conductors of the armature coil by changing the connection between the brush C and +1 and +2 while placing the brush position at two electric angular positions as shown in Fig. Where the number of conductors of the coil between +1 and C is greater than between +2 and C. Therefore, when the power supply voltage is applied to +1, the counter-electromotive force rotates at a low speed because it is larger than when the power supply voltage is applied at +2, and when the voltage is applied to +2, The cam plate 20, which rotates in conjunction with a crank arm (not shown), rotates once when the wiper blade (not shown) and the wiper arm (not shown) make one reciprocation in the output shaft of the wiper motor 13. On the cam plate 20, a cam contact is provided and slidingly contacts the stationary contacts S, + B and E.

When the wiper switch 11 is set to LOW (low speed), +1 B is connected to the + 1 circuit, and power is supplied to the +1 terminal of the wiper motor 13, so that rotation starts at a low speed. Therefore, + B and + S are connected when the cam plate 20 also rotates and the wiper arm and the wiper blade are outside the stop position. When the wiper switch 11 is turned off (stopped), the current supplied from the battery (not shown) flows through the relay contact point P2, the switch + S and the switch + 1 circuit at the cam contact 21 + To the + 1 terminal of the capacitor 13. When the wiper blade comes just before the stop position, the circuits of + B and + S of the cam plate 20 are cut off, and the wiper motor 13 tries to stop. Since the wiper motor 13 continues to rotate inertially and the cam plate 20 rotates, a circuit of + S and E is formed, so that the + 1 terminal of the wiper motor 13 is grounded so that the wiper motor 13 ) Stops quickly and stops the wiper blade at the stop position.

When the wiper switch 11 is set to HIGH (high speed), + B and +2 circuits are connected, power is supplied to the +2 terminal of the wiper motor 13 to rotate at high speed, .

The INT (intermittent operation) of the wiper switch 11 intermittently moves the blade at a low speed to wipe the windshield when the rain starts to fall or when the amount of rain such as drizzle is small. When the ignition switch 30 is turned on When the wiper motor 13 is at the stop position, a ground circuit is formed from the terminal 6 through the resistor R3, the capacitor C3, the terminal 4 and the cam plate contact 21 + S, and the capacitor C3 is charged The potential of the a contact is applied to the battery voltage. When the wiper switch 11 is set to INT, the terminal 3 is grounded through the wiper switch 11 so that the transistor TR3 is turned on and the relay 41 is activated so that the contact is connected to the P1 side and P1 and 5 , Power is supplied to the +1 terminal of the wiper motor 13 through the circuit of the switch + S, and the motor starts rotating at a low speed. When the circuit of + B and + S of the cam plate 20 is formed by the rotation of the wiper motor 13, the capacitor C3 flows through the resistor R3, the terminal 6, the cam plate 20 + B, + S, And discharge is completed, a ground circuit is formed through the cam plate 20 + B side, the terminal 3, the capacitor C3, the terminal 3 and the wiper switch INT1 and INT2, and the capacitor C3 is charged in the reverse direction, The potential becomes positive. When the wiper blade comes to the stop position by one reciprocation, the terminal 4 is grounded via the cam plate 20 and the base of the transistor TR3 is set to the minus potential, so that the transistor TR3 is turned off. TR3 is turned off, the suction force of the relay 41 disappears, and the contact of the relay changes to the P2 side so that the switch + S is grounded, and the electric brake is applied to the wiper motor 13 and stops. Capacitor C3 is discharged to the circuit of resistance R3 through terminal ④, cam plate (20) + S, E, battery, terminal ⑥, and TR3 is turned on at the very first state when discharging is completed And repeat the operation described above.

When the washer switch 12 provided on the wiper switch 11 is pressed, the washer fluid is sprayed on the windshield of the vehicle, and the wiper is operated only for a certain period of time, . ≪ / RTI > The washer motor 14 operates only while the washer switch 12 is on.

At this time, as shown in FIG. 2, since the terminal 1 is grounded through the switch W terminal, the capacitor C1 starts to be charged through the resistor R1, and when the base potential of the transistor TR1 falls, the transistor TR1 turns on. The capacitor C1 can be selected to operate the wiper for an arbitrary time by varying the value of the variable resistor R1 since the time from discharging to charging becomes the operating time. Subsequently, the charging of the capacitor C2 is started, and at the same time, the transistor TR2 is turned on to operate the relay 41. [ The wiper motor 13 operates at a low speed even if power is supplied from the relay contact P1 via the terminal 6 to the wiper switch 11 + S and the wiper switch 11 is in the off position. When the washer switch 12 is turned off, TR1 is also turned off. However, since TR2 is turned on for a predetermined period of time by the discharging current of the capacitor C2, current is continuously supplied to the +1 terminal of the motor through the relay contact 41 of the relay 41. [

The time from when the washer switch 12 is turned on until the transistor TR1 is turned on is the operation delay time (0.5 sec), and the time from when the transistor Tr1 is turned off to when the capacitor C2 is discharged is the interlocking time (3 sec).

The variable wiper operating device according to the present invention as described above variably controls the value of the variable resistor R1 provided in the ECU 40 of the vehicle in accordance with the operating time of the washer switch 12, So that it is possible to operate the wiper for a suitable time during the operation of the washer switch 12 according to the kind of dirt on the windshield of the vehicle to secure the visibility of the driver, have.

Claims (2)

In a wiper device of a vehicle, A wiper switch 11 for determining the operation state of the wiper, a washer switch 12 for determining the operation of the washer motor 14, and a fixed resistor, a variable resistor, a capacitor, a transistor, a relay 41, The ECU 40 controls the operation of the wiper switch 11 and the washer switch 12 according to the operation of the wiper switch 11 and the washer switch 12, And a washer motor (14) for spraying the washer fluid onto the windshield under the control of the washer switch (12) and the ECU (40). The variable wiper Operating device. The method according to claim 1, Wherein the ECU (40) incorporates a variable resistor (R1) for variable operation of the wiper operating device according to the operation time of the washer switch (12).