KR100375379B1 - Automobile wiper system having function of automatic parking - Google Patents

Abstract

The present invention relates to a vehicle wiper system having an automatic parking function, and installs a wiper power supply relay for controlling the operating power of the wiper in the conventional vehicle wiper operation system, and an electronic control unit (hereinafter referred to as ECU). A wiper operation by adding an on / off input circuit of a parking switch for determining whether the wiper is in the parking position and inputting it to the ECU according to a control signal Even if the ignition switch is turned off, the wiper automatically finds the parking position and stops, thereby providing an automobile wiper system with an automatic parking function that can improve the convenience of the driver and the consumer's satisfaction with the merchandise of the vehicle. will be.

Description

Automotive wiper system having function of automatic parking

The present invention relates to a vehicle wiper system having a function of automatic parking, and more particularly, to install a wiper power supply relay for controlling the operating power of the wiper in the existing vehicle wiper operating system, the control signal of the ECU And a relay operation circuit for operating the relay and an on / off input circuit of the parking switch for determining the parking position of the wiper and inputting the ECU to the ECU, so that the wiper is automatically parked even if the ignition switch is turned off during the wiper operation. The present invention relates to a vehicle wiper system having a function of automatic parking, which can improve the convenience of the driver and the consumer's satisfaction with the merchandise of the vehicle.

Generally, the wiper for automobile is to remove the dirt from the windshield of the vehicle and to secure the clock during the rain. The crank arm rotates by driving the motor installed in front of the vehicle, and the wiper blade moves from side to side through the link mechanism and the wiper arm. By wiping the front glass.

As the motor 30 for wiper operation, a DC motor is used, and a low speed terminal 32 and a high speed terminal 34 of the motor 30 are selected to pass a current, thereby allowing selective operation at a low speed and a high speed.

In addition, the output shaft of the motor 30 is provided with a rotating plate 70 that rotates in conjunction with the crank arm, the rotating plate 70 is to rotate one rotation when the wiper blade and the wiper arm reciprocating one.

The rotating plate 70 is in sliding contact with the fixing point such that the fixing point of the form shown in FIG. 4 is selectively electrically connected on the rotating plate 70 as it rotates.

3 is a circuit diagram showing a conventional vehicle wiper system, a wiper motor 30 for operating the wiper, a wiper switch 40 for selecting and operating the wiper at low speed and high speed or intermittent operation, and the like. It is composed of an intermittent operation relay 50 to stop the operation of the wiper or to control the driving of the motor 30 in the intermittent operation of the wiper, the washer motor 36 for operating the washer also the wiper switch 40 It is connected to and is operated according to the selection of the operation mode.

As shown in FIG. 3, all operations of the wiper are performed while the ignition switch 20 is turned on and the power is supplied from the battery 10.

First, the low speed operation of the wiper is performed by selecting the low speed mode of the wiper switch 40 so that the circuit passing through the low speed terminal 32 of the motor 30 is grounded through the terminal L of the wiper switch 40. .

Further, the high speed operation of the wiper is performed by selecting the high speed mode of the wiper switch 40 so that a circuit passing through the high speed terminal 34 of the motor 30 is earthed through the terminal H of the wiper switch 40. .

In addition, when the wiper is to be turned off, a circuit passing through the low speed terminal 32 of the motor 30 by selecting the off mode of the wiper switch 40 is connected to the terminal L and the terminal P of the wiper switch 40. To be connected to the intermittent operation relay (50).

The intermittent operation relay 50 connecting the ignition switch 20 and the ECU 60 at the coil side 52a earths the terminal P of the wiper switch 40 at the contact side 52b or rotates the rotary plate. Selective connection to the fixed point P of 70, when the wiper operation is off, the terminal P of the wiper switch 40 is connected to the fixed point P of the rotary plate 70, the fixed point P as the rotary plate 70 rotates If the fixing point B is connected to the motor 30 is stopped and the wiper blade is stopped.

In addition, when the driver puts the wiper switch 40 in the intermittent operation mode for the intermittent operation of the wiper, a current is supplied through the low speed terminal 32 of the motor 30, and the intermittent relay 50 for the intermittent operation. The wiper operation of low speed starts as the contact side 52b of () is earthed.

At this time, the circuit of the contact side 52b of the intermittent operation relay 50 is connected to the fixed point P of the rotating plate 70 by a predetermined control circuit in the ECU 60, and fixed according to the rotation of the rotating plate 70. The wiper stops when the point P and the fixed point B are electrically connected.

After the wiper is operated once as described above, the low speed operation is performed at intervals of the intermittent operation through the terminal ITN1, the terminal ITN2, and the terminal ITN3 of the control circuit and the wiper switch 40 in the ECU 60. Will repeat.

4 is a diagram illustrating a connection state of a fixed point according to the rotation of the rotating plate in the vehicle wiper system, and each of the fixed points P, B, and E is a contact side 52b of the intermittent relay 50 as shown in FIG. 3. ), The ignition switch 20, and the earth, respectively.

In FIG. 4, state a is the initial position of the wiper 70 and the wiper before the motor 30 is driven, that is, the rotation of the rotary plate is not performed, and the states b, c, and d are the motor 30. When the rotating plate is rotating, the state e indicates that the rotating plate returns to the initial position after the wiper is operated once.

State a and state e are the state where the fixed point P and the fixed point B are connected, and the state b, the state c, and the state d are the state where the fixed point P and the fixed point E are connected, and the wiper switch 40 is turned off. When the current of the battery 10 flows through the terminal P of the wiper switch 40 to the fixed point P and the fixed point B, the wiper motor 30 for driving the wiper is stopped.

If the wiper is operated from the state a to the state e and the driver turns off the wiper switch 40 in any state, the current of the battery is not changed until the rotating plate 70 continues to rotate to the state e. Since the earth is grounded through the fixed point P and the fixed point E from the terminal P of the intermittent actuating relay 50 from the terminal P of 40), the motor 30 continues to be driven, and the fixed point P and the fixed point B The motor 30 is stopped until the state e is electrically connected, and the wiper also stops working.

That is, even if the driver turns off the wiper that is operated in an arbitrary state, the motor 30 is continuously driven until the rotating plate 70 passes through each state to become the state e, and the rotating plate 70 is rotated. When e is reached, the motor is stopped and the wiper is stopped at the initial position.

However, when the ignition switch 20 is turned off during the operation of the wiper, all power for the wiper operation is cut off, so that the wiper stops in the middle of the windshield of the vehicle, and thus the user turns on the ignition switch 20 again. There was a hassle to turn off the wiper and turn off the ignition switch 20 after the operation.

The present invention has been made in view of the above problems, in the existing vehicle wiper operating system to install a wiper power supply relay for controlling the operating power of the wiper, to operate the relay according to the control signal of the ECU By adding the relay operation circuit and the on / off input circuit of the parking switch to determine the parking position of the wiper and input to the ECU, the wiper automatically finds the parking position and stops even if the ignition switch is turned off during the wiper operation. An object of the present invention is to provide a wiper system for an automobile having an automatic parking function, which can improve a consumer's satisfaction with a driver's convenience and a vehicle's productability.

1 is a circuit diagram of a wiper system having an automatic parking function according to the present invention.

2 is a flow chart showing the operation sequence of the wiper system having an automatic parking function according to the present invention.

3 is a circuit diagram showing a conventional vehicle wiper system

Figure 4 is a connection state of the fixed point according to the rotation of the rotary plate in the car wiper system

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

10: battery 20: ignition switch

30: wiper drive motor 40: wiper switch

50: intermittent operation relay 60: ECU

70: rotating plate 80: wiper power supply relay

90: relay operation circuit 100: parking switch

Hereinafter, the present invention will be described.

An automobile wiper system having an automatic parking function according to the present invention includes a wiper motor 30 for wiper operation connected to a battery 10 through an ignition switch 20, and a wiper switch for selectively operating the wiper. In the wiper system for an automobile, comprising: an intermittent operation relay (50) for controlling the drive of the wiper motor (30) during intermittent operation and off of the wiper;

ECU to install the wiper power supply relay 80 connected to the battery 10 to supply or cut off power to the vehicle wiper system, and to control the operation of the wiper power supply relay 80. The ECU 60 is connected to the relay operation circuit 90 connecting the coil side 82a of the wiper power supply relay 80 and the parking switch 100 according to the position of the wiper. ), The parking switch input circuit 102 is included in the wiper operation circuit.

In particular, the control method of the wiper power supply relay 80 by the ECU (60) is the vehicle wiper power supply relay 80 is turned on when the ignition switch 20 is turned on during the wiper operation The power supply is continuously supplied to the wiper system, but when the ignition switch 20 is turned off during the wiper operation, the ECU 60 automatically calculates a time from the time when the ignition switch 20 is turned off, thereby releasing 2 times the time required to rotate one motor. When the parking switch 100 is turned on within a K time that is a multiple, the wiper power supply relay 80 is turned off and the wiper power supply relay when the parking switch 100 is off within K time. 80 is maintained in the on state, the power supply relay 80 is automatically turned off after the K time.

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

1 is a circuit diagram of a wiper system having an automatic parking function according to the present invention, and FIG. 2 is a flowchart showing an operation procedure of a wiper system having an automatic parking function according to the present invention.

Reference numeral 62 denotes a central processing unit (CPU) in the ECU.

As shown in the drawing, the driver performs the low speed operation, the high speed operation, the intermittent operation, or the low speed operation of the wiper according to the operation of the wiper switch 40 in the same manner as the conventional vehicle wiper system.

In the vehicle wiper system having an automatic parking function of the present invention, a wiper power supply relay 80 is provided to supply or cut off power for the wiper operation according to the control signal of the ECU 60.

The wiper power supply relay 80 is connected to the battery 10 of which one side of the coil side 82a is a power source, and the other side of the wiper power supply relay 80b is controlled by the ECU 60 when the ignition switch 20 is turned on. Is connected to the relay operation circuit 90 of the ECU (60) to enable energization.

In addition, the wiper power supply relay 80 is configured to supply power to the wiper system when the coil side 82b is energized at the contact side 82b.

In the automotive wiper system of the present invention, the ECU 60 monitors the on / off state of the ignition switch 20 when the wiper is in operation.

In addition, when the driver turns off the wiper switch 40, the ECU 60 monitors whether the position of the wiper is located at the parking position.

That is, when the ignition switch 20 is turned off during the wiper operation, the ECU 60 recognizes this. If the driver turns off the wiper switch 40, the ECU 60 reaches the parking position of the wiper. As a result, the on / off of the wiper power supply relay 80 is controlled.

In the present invention, the automatic parking function of the wiper means that the wiper position is set when the ignition switch 20 is turned off while the wiper is operated when the initial position of the lower portion of the vehicle windshield, where the wiper is positioned before the initial operation, is the parking position of the wiper. If it is in the parking position, the wiper power supply relay 80 immediately cuts off all power to the wiper system, and if the wiper is not in the parking position, the power is supplied continuously until the parking position is reached. It will block after reaching.

On one side of the wiper switch 40, the ignition switch 20 is turned off, and when the driver turns off the wiper switch 40, the parking switch 100 is installed on / off depending on whether the wiper reaches the parking position.

The ECU 60 recognizes the arrival of the wiper parking position by inputting the ON signal of the parking switch 100 to the ECU 60, and the power supplied from the battery 10 starts the wiper. When positioned at the position, the wiper is in the parking position when it flows to the terminal P of the wiper switch 40 through the intermittent operation relay 50 through the fixed point B and the fixed point P of the rotating plate 70 to be electrically connected. The parking switch 100 for inputting into) is turned on.

In the operation of the wiper power supply relay 80, the relay operation circuit 90 energizes the coil side 82a of the relay 80 under the control of the ECU 60, but once the ignition switch 20 In the on state, the coil side is automatically energized to supply operating power from the battery 10 to the wiper system, but when the ignition switch 20 is turned off during the wiper operation, the control of the ECU 60 is followed. .

As shown in FIG. 4, the control method by the ECU 60 is started when the wiper is operated. Once the wiper is in operation and the ignition switch 20 is turned on, the wiper power supply relay 80 is continuously operated. Supply power to the battery 10 through).

However, when the ignition switch 20 is turned off during the wiper operation, when the ignition switch 20 is turned off when the doubling of the time required for one rotation of the motor 30 is K [sec], the ECU 60 is turned off. ) Automatically calculates the time and when the parking switch 100 is turned on within K, the wiper power supply relay 80 is turned off to stop the wiper at the parking position.

At this time, the ECU 60 monitors the on / off state of the parking switch 100 until the time T [sec] calculated after the ignition switch 20 is turned off reaches K. Time T [sec] is N (N = 1,2,3, ...) as the number of monitoring up to that moment, and when the predetermined sampling time [sec] by the ECU is S [sec], 'N same as x S '.

The ECU continues to monitor, but when time T is less than or equal to time K, the power is continuously supplied through the wiper power supply relay 80 until the on signal of the parking switch 100 is input to the ECU 60. do.

That is, the wiper continuously drives the motor 30 for wiper operation until the wiper reaches the parking position, and the parking switch 100 is turned on when the wiper eventually reaches the parking position by driving the motor 30. To turn off the wiper power supply relay 80 to cut off all power for the wiper operation.

However, if the parking switch 100 is not turned on because the wiper does not reach the parking position even when the calculated time T is later than the time K, the ECU 60 supplies the wiper power after the K [sec] time. The automatic relay 80 is automatically turned off to stop the power supply of the battery 10 and stop the driving of the motor 30.

This is to prevent the wiper motor 30 from being damaged due to continuous power supply and motor driving when the wiper does not accidentally reach the parking position within K [sec] time.

In this way, the vehicle wiper system having an automatic parking function according to the present invention may operate the wiper motor until the wiper reaches the parking position under the control of the ECU 60 even if the ignition switch 20 is turned off during the wiper operation. Drive and allow the wiper to park automatically.

As described above, according to the automotive wiper system having an automatic parking function according to the present invention, even if the ignition switch is turned off during the wiper operation, the wiper automatically finds the parking position and stops, thereby providing convenience to the driver and merchandise of the vehicle. This has the effect of improving consumer satisfaction with respect to performance.

Claims (2)

A wiper motor 30 for wiper operation connected to the battery 10, a wiper switch 40 for selectively operating the wiper, and controlling the driving of the wiper motor 30 when the wiper is intermittent and off. The intermittent operation relay 50, the wiper power supply relay 80 and the wiper power supply relay that can supply or cut off the battery 10 power to the wiper switch 40 under the control of the ECU (60) In the vehicle wiper system comprising a relay operation circuit 90 for transmitting a control signal of the ECU 60 for controlling the operation of the 80 to the wiper power supply relay 80, The ignition switch 20 is turned on during the wiper operation by including a parking switch input circuit 102 that transmits the on / off signal of the parking switch 100 according to the position of the wiper to the ECU 60 in the circuit for wiper operation. In this case, the wiper power supply relay 80 is turned on to continuously supply power to the wiper system, and when the ignition switch 20 is turned off during the wiper operation, the ECU 60 is turned off. ) Automatically calculates the time and turns off the wiper power supply relay 80 when the parking switch 100 is turned on within K time, which is twice the time required for one motor rotation, and the parking time within K time. When the switch 100 is not in an on state, the wiper power supply relay 80 may be automatically turned off after K time while maintaining the on state of the wiper power supply relay 80. Wiper system having the features of the automatic parking, characterized in that the rock. delete