JPH0464895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cleaning device for automobile windows.

[Conventional technology]

In order to meet the demands of road traffic, modern automobiles are equipped with windshield cleaning devices, which can perform a series of separate wiper and washer operations depending on the position of the operating switch. In most automobiles today, the wiper speed can be switched from a lower speed to at least one higher speed during continuous operation. Furthermore, many wiper devices are capable of intermittent operation. Furthermore, so-called tap-wipe operations are possible. This tap
The wipe operation is an operation mode in which only one wiper operation is performed. Finally, it is also known to carry out a wiper/washer program at a specific position of the operating switch, in which, for example, first the washing pump motor is started and then the wiper device is operated with a delay and the washing is started. Several additional wipe cycles are performed after the operation is completed. Furthermore, in all modern wiper systems, after switching off the operating switch, the wiper is retracted into a defined parking position. This mode of operation is called switching-off operation.

In the current series of wiper systems produced, various control lines are required for controlling the wiper motor and, if necessary, the washing pump motor. In most cases, the motor's operating current flows through these conductors. The switches and their control leads therefore have to be designed accordingly, which results in very high costs.

Circuit arrangements for windshield wiper devices of automobiles are already known for reducing wiring, in which only one control conductor is provided between one switch and one program controller. be. Through this control lead, different potentials are applied to the program controller for different modes of operation.

It must be taken into account that the supply voltage in a motor vehicle varies significantly, so such circuit arrangements must be cannot perform a satisfactory operation. Since only low voltages are normally available in automobiles, there is a limit to the adjustment of the operating mode using this method.

[Problem to be Solved by the Invention] The present invention makes it possible to select a plurality of operating modes by means of a signal supplied by a single control conductor, and the control signal is independent of the operating voltage within the vehicle. The purpose of the present invention is to provide an automobile window cleaning device which uses a device to ensure operation mode selection without being affected by fluctuations in operating voltage, thereby increasing operational reliability, and which has a relatively simple configuration. It is something to do.

[Means and effects for solving the problem] The present invention includes a manual activation switch for adjusting an operation mode, a program controller,
In an automobile window cleaning system having a control lead connecting the actuation switch to a program controller and a wiper motor which can be controlled in various operating modes by the program controller, the manual actuation switch is connected to a single common control line. Therefore, it is connected to a program controller, and the number and duration of switching pulses generated by this operating switch, or the time interval between two pulses, is predetermined corresponding to the operating mode, and such operating mode is controlled. A manually actuated switch generates switching pulses representing the actuation switch and leads them by a single control lead to a program controller that controls the number, duration, or two of the switching pulses generated by the actuation switch. The present invention is characterized in that it includes means for identifying the time interval between individual pulses and switching to an operating mode.

The basic idea of the invention can be realized in such a way that specific operating modes can be directly assigned to specific characteristic features of the switching pulses or pulse trains. This has the advantage that a determined operating mode can be implemented by the next switching pulse independently of the currently established operating mode.

However, the invention can also be implemented in such a way that the operating mode is carried out depending solely on the preceding operating mode by the generation of the switching pulse. Furthermore, the operating mode to be carried out can also be made dependent on the timing of generation of the switching pulse. In both cases the system can be designed in such a way that only the occurrence of switching pulses is evaluated, and the type of switching pulse or pulse train is not important. Such types are particularly simple and reliable to manufacture.

The operating mode is evaluated by time-related characteristic features of the switching pulse or switching pulse train, such as the duration of a switching pulse or the time interval between two switching pulses or also the number of pulses per unit time. You can do it like this. Finally, it is also possible to make the operating mode dependent on the mark-to-space ratio of the switching pulse train. By combination of all these characteristic features and appropriate evaluation and identification in the program controller, a plurality of different operating modes can be realized. Furthermore, it is of course also possible to make the operating mode dependent on the voltage level or current level of the switching pulse, thereby further increasing the possibility of changing the operating mode.

An embodiment is preferred in which the operating mode changes with each new switching pulse cyclically and independently of its characteristic features. For this purpose, the program controller consists of a kind of ring counter that is incremented by each switching pulse.

In such embodiments, all operating modes are programmed between the currently active operating mode and a desired operating mode which must be switched by a short switching pulse, and when the device is turned off. Alternatively, when a particular operating mode is switched on, according to a further advantageous refinement of the invention, the switching pulses are cycled continuously by means of switching pulses having specific and characteristic features, but with other characteristics. A particular operating mode can be selected by means of a switching pulse having specific characteristics. It is also possible, for example, for short pulses to cause the ring counter to step forward, but for long pulses to move it in the opposite direction, thereby making it possible to start from a particular operating mode and switch more quickly to another operating mode. . A further series of combination possibilities has also been recognized, which allow a particularly simple operation of the cleaning device.

These various forms will be explained in detail in connection with examples. Furthermore, it is also possible to take into account whether the switching pulses are generated, for example, during the wiper operation or only after the end of the wiper operation. This identification method is particularly suitable in connection with intermittent operations. This is because the interval time can then be varied depending on the time between two switching pulses. Due to the many possibilities of variations in the embodiments according to the invention in addition to the basic operating modes, certain characteristics of the individual operating modes can be made to be influenced, for example by time intervals, so that the corresponding switching signal is directed to the program controller by control leads only.

Of course, in addition to the control line through which the operating mode is influenced, further control lines are provided, through which, for example, the interval time or the specific wiper cycle can be determined.
A watcher program may also be started. In this connection, it is also possible to control other elements of the cleaning device by means of further control lines, for example to increase the contact pressure of the wiper blades on the windshield when the car is traveling at high speeds. be.

〔Example〕

The present invention will be explained below with reference to embodiments shown in the accompanying drawings.

A wiper motor is shown at 10 in FIG. 1, which can be operated at two different speeds. Wiper motor 1 for low speed continuous operation
0 is controlled via brush 11 and for high speed continuous operation via brush 12. A limit switch 13 corresponding to the wiper motor is installed in a known manner so that it is in the position shown in the parking position. Outside the parking position, this limit switch 13 is connected to a ground terminal 14 of a power supply, the positive pole 15 of which is only shown and not shown in detail. Relay 16, 17, 18, or 19
When one of the wiper motors is excited, the wiper motor 10 starts operating. The operating mode by which the cleaning device is operated depends on which of these relays is energized.

When relay 19 is energized, high-speed continuous operation begins, and when relay 18 is energized, low-speed continuous operation begins. Relay 17 is controlled by a pulse generator 20 which is triggered by limit switch 13. This relay 17 is controlled periodically and therefore operates intermittently. The relay 16 is controlled in a so-called switching-off operation, when the wiper is moved into a so-called park position.

The essential part of the program controller, generally designated 30, is a type of ring counter 31 with a clock input 32. The operating switch 22 is connected to this clock input 32 via only the control line 21.
connected to. The mode of operation of this ring counter 31 can be considered as follows: only one of the outputs 36, 37, 38 or 39 is energized at a time, with each positive slope at the clock input 32. The output just energized by is turned off and the next output is cyclically energized in its place. When the output section 39 is energized,
Output 36 is energized by the next switching pulse at clock input 32, while output 39 is turned off.

In the following description of the embodiment of FIG. 1, operation begins with output 36 energized and limit switch 13 in the position shown. Therefore, relay 16 is deenergized. Since the output parts 37, 38, 39 other than the output part 36 are not energized, the other relays 17, 18, 1
No current flows through winding 9 either. The cleaning device is therefore inactive since the current to the motor 10 is cut off.

When the activation switch 22, which is developed as a touch switch, is activated, the ring counter 31 is advanced by the positive slope of the switching pulse available on the control line 21. This means that the output section 36, which has been energized up to now, is turned off, and the output section 37 is turned off.
means that it is energized. The pulse generator 20 is therefore switched on and the relay 17 is energized. Operating current therefore flows from terminal 15 to brushes 11 of the wiper motor and the motor starts rotating. A little later, limit switch 1
3 closes the connection to the earth 14. However, it does not affect the pulse generator 20, whose trigger input 23 is connected to the limit switch.

The pulse generator 2 is activated only when the limit switch 13 is opened again after one wiper operation is completed.
0 is off and relay 17 is deenergized. The motor circuit is therefore cut off. After some delay time, pulse generator 20 automatically switches relay 17 on and the operation is repeated. That means that if the output 37 of the program controller 30 is activated, the wiper device is controlled in intermittent operation. Now, when the actuation switch 22 is newly energized during the intermittent operation, the output section 37 is turned off, the output section 38 is energized, and the relay 18 is operated. The wiper motor 10 is driven for continuous operation at a low wiper speed. Output 39 is energized with the next switching pulse, energizing relay 19 and driving the wiper motor in high speed continuous operation. Output 36 is activated with the next switching pulse of control line 21. At this time, if the wiper is located outside the parked position, the limit switch 13 is closed. Relay 16 is then energized to close the motor circuit until the wiper is in its parked position. Relay 16 is then deenergized. However, the output 36 remains energized because the limit switch 13 is opened again. This mode of operation is called switching-off operation. In this simple embodiment according to FIG. 1, the operating mode is therefore switched on by a switching pulse on the control line 21, so that the new operating mode depends on the operating mode at the time the switching pulse was emitted. . The operating mode changes with each new switching pulse in a cyclically continuous manner, independent of the characteristics of the switching pulses. The cyclical continuation operation therefore takes place according to suitably defined conditions such that the switching-off operation first changes to a slow continuous operation and then to a high speed continuous operation. Although other continuation operations are of course possible, the embodiment shown in FIG. 1 is preferred. This is because starting from the switching-off position allows sequential operation modes such as those actually required when it starts to rain.

FIG. 2 shows a slightly modified and improved embodiment, in which only the control portions of the program controller 30 are primarily shown for the sake of simplicity. In this embodiment, the ring counter 31 has a reset input 33, which is controlled by a monostable flip-flop 40 corresponding to the delay. The pulses obtained at this reset input are output to the output 36.
is energized, but all other outputs are OFF. For example, flip-flop 40
is designed such that a reset pulse is generated at its output when the activation switch is energized for more than 500 milliseconds. For the operation of the embodiment of FIG. 2, this means that the ring counter is incremented with each pulse of the control line 21, but is in any case switched off by a long switching pulse. It means that it can be switched. The new operating mode in this embodiment is therefore dependent on the previous operating mode on the one hand, but on the other hand it is switched to the determined operating mode by means of a long switching pulse independently of the preceding operating mode. The mode of operation therefore depends on the time-related characteristics of the switching pulse, ie the duration of the switching pulse. Two alternatives are possible in this regard. An advance of the ring counter 31 can be effected by the slope of the switch on of the switching pulse, but this means that the next operating mode will be activated even though it is desired to stop the wiper device. It is therefore desirable that the new operating mode be switched only by the switching-off slope of the switching pulse, as shown in FIG. Such a solution is therefore also constructed in such a way that the operating mode operates cyclically and continuously with each new switching pulse having specific characteristic features, ie only short switching pulses.

In the embodiment of FIG. 3, flip-flop 41 is connected in series with clock input 32 of ring counter 31. The inverting output 42 of this flip-flop 41 is the output 36 of the program controller by which the relay 16 is controlled. Output section 3
The gate 44 following 7, 38, 39 is controlled by the other output 43 of flip-flop 41. In this embodiment, the trigger signal is only triggered by every second switching pulse.
It is then led to the control line 21 to the ring counter 31 whenever the output 43 is energized. Gates 44 are therefore opened at the same time. This means that the operating mode is switched only by each second switching pulse of the cycle continuation. Flip-flop 41 is reset by each switching pulse so that output 36 is energized while gate 44 is blocked.

Therefore, in this embodiment, there is successive switching from one mode of operation to switching-off operation, then to another mode of operation, and then back to switching-off operation, and so on.

In the embodiment of FIG. 4, an OR gate 45 is connected in series with the clock input 32 of the ring counter 31 and is controlled by the activation switch 22 or by the clock generator 46. Timing element 4 with appropriate delay time
7 is connected in series with the clock generator 46. Clock generator 46 is controlled through timing element 47 when activation switch 22 is energized for more than a predetermined period of time, for example over 500 milliseconds. Clock generator 46 then causes the operating mode to cycle continuously in short time intervals. It is therefore possible, for example, to start from intermittent operation and switch to switching-off operation by means of a long-time switching pulse. An indicator light 49 is provided at the output of the ring counter 31 to identify the operating mode in which the switch is on. Therefore, in this case too, the characteristic features of the switching pulse,
That is, the duration (width) of the pulse is evaluated.

Next, the embodiments shown in FIGS. 5 and 6, which are preferably implemented using a microcomputer, will be described. The circuit diagram in FIG. 5 shows only the basic units to make it easier to understand the operation of the device. The wiper motor 10 is controlled by a switching relay 50, and the relay 50 is connected to the output part of an OR gate 51. One of the inputs of this OR gate 51 is controlled by a unit 52, which outputs a so-called tap-wipe operation or wiper-washer program.
Its operation is as follows: operating switch 22
By supplying a short switching pulse to the input 53, the unit 52 is controlled so that the switching relay 50 is turned on via the OR gate 51 until the limit switch 13 assumes the position shown after the end of one wiper operation. Forced. The input 54 of said unit 52 is then energized and the switching relay 50 is turned off again. Therefore, a so-called tap-wipe operation is performed by a short switching pulse, which means that a wiper operation has been performed.

Clock input 61, reset input 62, block input 63 and two outputs 64 and 65
A function counter 60 with a function counter 60 is provided in the embodiment of FIG. Outputs 64 and 65 can be energized only alternately, as shown in the voltage-time diagram of FIG. 6, or both can be turned off.
There is no switching position in which both outputs are energized together. The signal at reset input 62 turns both outputs 64 and 65 off. The signal at block input 63 blocks clock pulses from being processed by this functional counter. The blocking input 63 is connected to the output of a timing element 67 with a suitable delay time. A blocking signal is therefore obtained at this blocking input 63 only when a long switching pulse is applied by the activation switch 22. In the embodiment of FIG. 5, an interval time generator 68 is provided, the output of which is connected to another input of the OR gate 51. counter 6
The number in 9 determines the interval time of interval time generator 68. A delay circuit 70 is connected in series with the reset input 62 of the function counter 60 and is triggered via an AND gate 71. The input of this AND gate 71 is connected to the output 64 of the function counter 60, and the other inverting input of the AND gate 71 is connected to the limit switch 13. The delay circuit 70 therefore has a terminal position in which the wiper motor occupies, and a signal at the output 6.
It will only be triggered when given to 4. The delay circuit 70 generates a reset signal some time after the wiper operation is completed, for example 20 seconds. From FIG. 6, then both outputs 64 and 6
It can be seen that 5 has been turned off.

The output 65 of the function counter 60 is connected to the inputs of two AND gates 73 and 74. One AND gate 73 is the interval time generator 6
8, and the output of the other AND gate 74 is connected to a further input of the OR gate 51. When AND gate 74 is connected, the wiper device is controlled in continuous operation. However, when AND gate 73 is activated, the wiper device operates intermittently. Both are possible only when the output section 65 is energized. The distinction as to which operating mode to switch to is provided by a time identification element 75 following the counter 69. If the counter count is greater than the expected value, AND gate 7
3 is energized to perform intermittent operation, and if the count value of the counter is smaller than the scheduled value, the AND gate 74 is activated.
is energized for continuous operation.

The detailed operation of the embodiment of FIG. 5 is as follows.

As previously explained, the initial brief energization of activation switch 22 causes unit 52 to perform a tap-wipe operation. At the same time, the function counter increments, so that output 64 is energized. When the wiper operation is completed and no new switching pulse is generated within a given time period, for example 20 seconds, the delay circuit 70 sends a reset signal to the reset input 6.
2, and both outputs 64 and 65 are turned off again.

The following description begins with the tap-wipe operation being turned on by a single short switching pulse. If a second switching pulse is now generated, output 64 is switched off as shown in FIG. 6, but output 65 is energized. Therefore, in this state, either intermittent operation or continuous operation is possible. The distinction is determined by the time interval between the first and second switching pulses. If the second switching pulse is generated during the wiper operation or, for example, within a given time after the end of the wiper operation, the count value of the counter 69 is relatively low and the AND gate 74
is activated via the time identification element 75. A continuous operation is therefore performed. However, if the second switching pulse occurs much later than the end of the wiper operation, but within 20 seconds of its end, the counter value will be relatively high and the AND gate 73 will be activated. Intermittent operation is therefore performed. The interval time therefore corresponds to the time between the first and second switching pulse.

Regardless of whether intermittent operation or continuous operation is being performed, when the next switching pulse is generated, output section 64 is energized again and output section 65 is turned off. In this switching state of the function counter 60, the wiper operation ends.

If a new switching pulse is now generated, either continuous operation or intermittent operation is performed, which is possible by changing the interval time. If no new switching pulse is generated, both outputs 64 and 65 are connected to a delay circuit 70.
It will turn off again after the delay time has elapsed.

In this way, the function counter 60 acts like a kind of ring counter, and thereby the output section 6
4 is activated every odd-numbered switching pulse, and the output section 65 is activated every even-numbered switching pulse. When output 64 is energized, both outputs are turned off unless a new switching pulse is generated within the delay time. Assume, of course, that none of the outputs of the functional counter 60 are energized when the supply voltage is first applied.

If a long switching pulse is generated by actuation switch 22, timing element 6
7 is energized. On the one hand, the timing element 67 puts the function counter 60 into a blocked state, and on the other hand switches the unit 52 on via the input 55.
This controls relay 56 to scrub pump motor 57, which is energized as long as actuation switch 22 is closed. After turning off the activation switch, several additional wiping cycles are performed. By feeding back the signal of timing element 67 to blocking input 63, the count of functional counter 60 is not affected by long switching pulses. This means that the operating mode that was switched on before the long-duration switching pulse was generated continues thereafter.

In the embodiment of FIG. 5, the new operating mode is thus dependent, among other things, on the timing of the switching pulses. This timing therefore also depends on the course of the wiper movement. Finally, the operating mode also depends on the number of switching pulses per unit time. If starting from the rest position, the actuation switch 22 is briefly energized twice in succession, continuous operation occurs. However, if the time interval between the two switching pulses is large enough, intermittent operation will occur.

FIG. 7 shows a final embodiment in which two ring counters 80, 81 are provided, one ring counter determining the operating mode and the other determining the interval between pulses. do. Further, in this embodiment, the operating mode is made to depend on the voltage level of the switching signal. For this purpose, a voltage indicator 82 is provided, one output 85 of which is connected to a ring counter 80.
The other output 86 affects the ring counter 81. The input of this voltage indicator 82 is connected to the activation switch 22 via the control line 21 only. The actuation switch 22 has two pushbuttons 83, 84, in which the full actuation voltage is applied by the pushbutton 83 and, for example, half the actuation voltage by the pushbutton 84, as a switching pulse. The voltage indicator 82 is connected to a resistor network to provide a voltage indicator 82 . Output 85 of voltage indicator 82 is energized only when pushbutton 83 is energized, while output 86 is energized when pushbutton 84 is energized.
is energized when energized. A gate 87 is connected to the output section 86. This gate 87 is controlled by the output 37 of the ring counter 80.
The detailed operation of the device of this embodiment is as follows. By energizing pushbutton 83, the operating mode is continuously changed in a cyclical manner as described in detail with respect to FIG. If the output 37 of the ring counter 80 is energized and the intermittent operation is switched on, the gate 87 opens so that the ring counter 81
can be advanced by energizing pushbutton 84. In this way, the various outputs of the ring counter 81 are energized in a cyclically continuous manner, so that these outputs act on the pulse generator in such a way that the interval times vary. Therefore, in this embodiment, it is assumed that a certain time interval is scheduled when switching to intermittent operation. If pushbutton 84 is activated, this interval time is extended or shortened in steps. Of course, such a system could also be adapted to evaluate, for example, the duration of the switching signal rather than the voltage or current level of the switching signal.

Finally, in this device, for example, a separate cleaning program can also be carried out independently of the ring counter 80 by means of further voltage levels.

Finally, it should of course be emphasized that the figures are only used to illustrate the possible switching functions. Preferably, the program controller is fabricated using integrated technology where possible using a microprocessor or microcomputer family.

The present invention exhibits particularly excellent effects when used in a wiper device for a rear window. it's just one
It is particularly important that only one control lead is needed. Of course, the windshield wiper system can also be controlled in the same way. In the embodiment shown in FIG. 8, the rear window wiper device, which depends on the characteristic features of the switching pulses, is combined with the windshield wiper device. This will be discussed below.

If the windshield wiper system is operated, the rear window wiper system often must also be operated. In fact, it is not sufficient if the rear window wiper system performs fewer wipe operations per unit of time than the windshield wiper system. If the windshield wiper device is switched off, the rear window wiper device requires at most one cleaning cycle.

In order to meet these requirements, in the embodiment of FIG. 8, the rear window wiper device performs one wipe operation by inputting short pulses, but does not perform a second short switching operation within a given time interval. By means of the pulse input, the rear window wiper device is coupled to the windshield wiper device in the following manner. That is, the rear window wiper system only performs a wipe operation every fourth wipe cycle of the windshield wiper system, and the input of the third short switching pulse causes the rear window wiper system to wipe. Switched off after the cycle ends. As a result, each brief activation of the operating switch causes the wiper device to operate one wipe cycle, with each even numbered switching pulse coupling the rear window wiper device with the windshield wiper device, and each subsequent odd numbered switching pulse to couple the rear window wiper device with the windshield wiper device. The th switching pulse switches the rear window wiper device back into a so-called wiping operation.
The motor is then turned off after the end of the wiper operation.

In Figure 8, the rear window wiper motor is 1
It is indicated by 00. A position switch 101 is provided for this motor 100.
0 is switched by relay 102. This relay 102 is controlled by an OR gate 103 and a subsequent inverter. or gate 103
has an input connected directly to the actuation switch 22. In this way, the wiper operation is performed directly by energizing the switch 22.

However, activation of switch 22 also sets timing element 104, which triggers storage device 106 via the subsequent inverter and gate 105 only if the activation time is longer than, for example, 0.5 seconds. The setting of storage device 106 simultaneously controls one of the inputs of OR gate 103, so relay 102 remains energized until storage device 106 is reset. When storage device 106 is set, counter 108 is activated by gate 107 and switch 22 is then reset. The counter 10
8 counts the pulses of the position switch 101. A comparator 109 following this counter 108 compares the count value of the counter 108 with a number that may be predetermined arbitrarily in block 110, for example three. If the numbers are equal, a reset signal for storage device 106 is generated via monostable flip-flop 111. In this way, it is ensured that the wiper motor 100 of the rear window wiper system performs three wipe operations by means of long switching pulses of the operating switch 22. This is a wiper
is part of the washers program in which the scrubbing pump is turned on with an additional delay by actuation of the actuating switch 22 and turned off again when the switch 22 is released, resulting in three additional wash pumps. Wiper operation still occurs. It should be additionally pointed out that in connection with this first part of the circuit arrangement, the counter 108 is reset via a monostable flip-flop 112 at any time.

By energizing switch 22, storage device 113 is simultaneously set. The counting stage 114 is therefore reset via the timing element 115 and at the same time the counting input is released. Counting stage 114 counts the clock pulses of generator 116. A subsequent comparator 117 compares its count value with a number optionally predetermined in block 118, for example 20, and generates a reset signal to storage device 113 via monostable flip-flop 119 in case of a match. The output of the storage device 113 is the timing element 1
20 to another input of the OR gate 103. In this way, after activation of the actuating switch 22, the accumulator 113 is completely activated for a period of time, e.g.
It can remain set for seconds. If a second switching pulse is generated within this period, another storage device 121 is set via AND gate 122. If it is a short switching pulse and the storage device 106 is therefore not triggered, gate 1
23 is opened and the dividing stage 124 is energized.

The clock input of this division stage 124 is coupled to the limit switch 13 of the windshield wiper motor 10 and generates a switching signal via a monostable flip-flop 125 only with the nth, for example the fourth, wiper operation. The switching signal is led to a further input of the OR gate 103. If two short switching pulses are thus applied by the actuation switch 22 within a given time interval, for example 20 seconds, the rear window wiper device is coupled to the windshield wiper device. If a new short switching pulse is now applied, on the one hand storage device 113 is reset and storage device 121 is also cleared via gates 126 and 127.
Accordingly, the dividing stage 124 is deenergized and the wiper operation currently occurring is terminated. One input part of the OR gate is a limit switch 10.
resistor 130 until 1 is closed in the parked position.
This is because a positive potential is applied via the .

Of course, the embodiment of FIG. 8 is only one possible example. Coupling the rear window wiper device with the windshield wiper device by the generation of a short switching pulse, the wiper watcher being programmed when a second switching pulse occurs within a given time interval. It is therefore also possible to switch off the rear window wiper device again or to disconnect it from the windshield wiper device by means of another input (which may be a switching pulse longer than a time interval). Also, the first short switching pulse switches to tap wipe, the second short pulse causes intermittent operation of the rear window, and the third pulse causes continuous operation of the wiper device, thereby causing the wiper to wipe the rear window. It is also conceivable to adopt suitable means such as automatically adjusting the pulse interval depending on the friction conditions of the window. Such devices are switched off with long pulses. In another variant, a self-regulated intermittent operation with a pulse interval (which can be 0) is performed with a first short pulse and the device is switched off with a long pulse. The rinsing pump can thereby be turned on in two short pulses. Finally, the wiper/washer operation of the rear window device can be performed with each first pulse.
Although this is useful from a safety standpoint, it may result in unnecessary use of flush water. However, this drawback can be overcome by filling the water container with rainwater.

[Effects of the Invention] As explained above, in the present invention, a switching pulse representing an operating mode is generated by a manual operating switch, and the pulse is guided to a program controller through a single control lead, so that the program controller The number and duration of switching pulses generated by the operating switch, or the time interval between two pulses, are identified to switch the operating mode, so only one control lead is required to select multiple operating modes. , the wiring, circuits, and device configurations inside the vehicle can be simplified. Moreover, when identifying the temporal characteristics of switching pulses such as the number of pulses, duration, or time interval between two pulses, it is difficult to identify the time characteristics of switching pulses, such as the conventional method that uses voltage signals. Since it is not affected by voltage fluctuations of the internal power supply, malfunctions do not occur and extremely high reliability can be obtained.

Furthermore, when using voltage signals, the signal voltage for each operation mode must have a sufficiently large difference with respect to the fluctuation range of the power supply voltage, so the number of selectable operation modes cannot be increased too much. However, by using the number of pulses, duration, or time interval between two pulses as in the present invention, it is possible to increase the number of signals that can be reliably identified. It is easy to increase the number.

Furthermore, such a selection signal can be easily obtained by opening and closing a manual operating switch, so even if the number of operating modes increases, the input device only needs to be the same single manual operating switch. No additional equipment is required. Therefore, the device can be constructed relatively easily despite its high reliability.

[Brief explanation of drawings]

1 to 5 and 7 and 8 show circuit diagrams of various embodiments of the present invention, and FIG.
Figure 3 shows a voltage-time diagram for explaining the functional counter used in the illustrated embodiment; 10...Wiper motor, 11,12...Motor brush, 13...Limit switch, 16,1
7, 18, 19...Relay, 20...Pulse generator,
22... Operating switch, 30... Program controller, 31... Ring counter, 40... Monostable flip-flop, 41... Flip-flop, 44...
Gate, 45...OR gate, 46...Clock generator, 47...Timing element, 49...Indicator light, 50
...Switching Relay, 51...Or Gate, 56
... Relay, 60... Function counter, 67... Timing element, 68... Interval time generator, 69... Counter, 70... Delay circuit, 71, 73, 74... AND gate, 75... Comparator, 80, 81... Ring counter, 82... Voltage indicator, 83, 84... Push button switch, 87... Gate, 100... Wiper motor, 101... Position switch, 102... Relay,
103...OR gate, 104, 115...timing element, 105, 107, 123, 126, 12
7...Gate, 106...Storage device, 108...Counter, 109, 117...Comparator, 111, 119,
125...monostable flip-flop, 113,12
1...Storage device, 114...Counting stage.

Claims (1)

[Scope of Claims] 1. A manual actuation switch for adjusting the operating mode, a program controller, a control lead connecting the actuation switch to the program controller, and a wiper motor controllable in various operating modes by the program controller. in an automobile window cleaning device comprising: said manual actuation switch being connected to a program controller by a single common control lead, and wherein switching pulses for selecting an operating mode generated by said actuation switch are connected to said single common control lead; A control lead leads to a program controller, the program controller comprising means for counting the number of switching pulses and switching to a predetermined operating mode according to the count value. Cleaning equipment. 2. An automobile window cleaning device according to claim 1, wherein the means for counting the number of switching pulses and switching to a predetermined operation mode based on the count value comprises a ring counter. 3. comprising a manual actuation switch for adjusting the operating mode, a program controller, control leads coupling the actuation switch to the program controller, and a wiper motor controllable in various operating modes via the program controller; In an automotive window cleaning device, the manual actuation switch is connected to a program controller by a single common control lead, and the switching pulses generated by the actuation switch to select the mode of operation are connected to the single control lead. An automobile window cleaning device, characterized in that the program controller is guided by a program controller, and the program controller is provided with means for identifying the duration of the switching pulse and switching to a predetermined operating mode according to the duration. 4. A manual actuation switch for adjusting the operating mode, a program controller, a control lead connecting the actuation switch to the program controller, and a wiper motor controllable in various operating modes via the program controller. In an automotive window cleaning device, the manual actuation switch is connected to a program controller by a single common control lead, and the switching pulses generated by the actuation switch to select the mode of operation are connected to the single control lead. and is thus guided by a program controller, the program controller having means for identifying the time interval between two switching pulses and switching to a predetermined operating mode based on the time interval between the two switching pulses. An automobile window cleaning device characterized by: