JP4247408B2 - Vehicle washer control device - Google Patents

Description

  The present invention relates to a vehicular washer control device installed in a vehicle having a front window glass member and a rear window glass member.

  Hereinafter, a conventional vehicle washer control device will be described. For example, as an example of the prior art, a type in which a washer tank, an injection nozzle, and a pump are provided, and the pump conveys water from the washer tank to the injection nozzle by pressure, the pressure flows in relative wind to the vehicle. Some control is possible in relation to speed (see Patent Document 1).

  As another example, in a vehicle window washer device that injects washer liquid onto a window glass or the like by operating an operation switch, speed detection means for detecting the traveling speed of the vehicle, injection means for injecting the washer liquid, There is a control means for controlling the amount of washer fluid injected by the injection means in accordance with the traveling speed of the vehicle detected by the speed detection means (see Patent Document 2).

As described above, according to the prior art vehicle washer control device described in this patent document, the washer fluid is allowed to slide on the wiper of the vehicle window regardless of the vehicle speed by controlling the injection amount and the injection pressure of the washer liquid according to the vehicle speed. It is possible to hit the region (visibility important part), and high visibility can be secured after the wiper slides.
JP 2000-190822 A JP 2000-142328 A

  However, none of the prior art vehicular washer control devices described in this patent document has a mechanism for controlling both the front-side washer fluid injection and the rear-side washer fluid injection. That is, it is necessary to separately provide a control mechanism for injecting the washer liquid on the front side and a control mechanism for injecting the washer liquid on the rear side, which increases the cost.

  In addition, the vehicle washer control device described in the above-mentioned patent document does not have the technical idea of changing the amount and pressure of washer fluid injection between the front side and the rear side, and the vehicle speed is high. In this case, it was unclear whether or not the washer liquid could be accurately applied to the wiper sliding region of the rear vehicle window.

  Therefore, the present invention solves this problem, and ishes the washer liquid to the window glass members of the front side window glass member and the rear side window glass member with one mechanism (more specifically, with one motor device). An object of the present invention is to provide a vehicular washer control device that can inject and change the amount and pressure of washer fluid injected between the front side and the rear side.

(Claim 1)
In order to achieve this object, a vehicle washer control device according to claim 1 is a vehicle washer control device mounted on a vehicle having a front window glass member and a rear window glass member.
A front-side pump device for injecting washer fluid onto the front-side window glass member;
A rear pump device for injecting washer fluid to the rear window glass member;
A motor device for driving the front pump device and the rear pump device;
A switching device for switching the pump device driven according to the rotation direction of the motor device from the front pump device to the rear pump device or from the rear pump device to the front pump device;
A power supply line for supplying power to the motor device,
The feed line is assembled in a bridge circuit shape so that the rotation direction of the motor device can be changed, and the motor device is disposed on the bridge side portion of the feed line, while each non-bridge side portion Is equipped with a switching device,
Furthermore, a vehicle speed detection sensor that detects vehicle speed information;
A PWM control device that PWM-controls the current flowing through the motor device based on the detection result of the vehicle speed detection sensor;
When the detected value of the vehicle speed detection sensor is greater than a predetermined speed threshold value and is detected as high-speed running, the PWM control device is configured to switch the motor device when the motor device is switched to the front pump device by the switching device. The duty ratio of the current flowing through the device is made smaller than the duty ratio when traveling below the predetermined speed threshold, while the motor device is switched to the rear pump device by the switching device. The duty ratio of the current flowing in the vehicle is made larger than the duty ratio when the vehicle travels below the predetermined speed threshold value .
According to the washer control device according to claim 1, having such a configuration, when the switching device disposed on the non-bridge side of the feeder line assembled in a bridge circuit is switched, the direction of the current flowing in the bridge side Will change. As a result, the rotation direction of the motor device changes, so that the switching device switches the pump device driven by the motor device from the front pump device to the rear pump device or from the rear pump device to the front pump device. As a result, it is possible to inject the washer liquid to both the window glass members of the front window glass member or the rear window glass member by one mechanism, and either one of the rear window glass member or the front glass member. It is possible to selectively inject the washer liquid onto the glass member.
Further, the PWM control device performs PWM control of the current flowing through the motor device based on the detection result of the vehicle speed detection sensor, that is, based on the vehicle speed, so that the injection pressure of the washer fluid of the pump device is controlled.
Furthermore, when the vehicle speed detection sensor detects that the vehicle is traveling at a high speed, when the motor device is switched to the front pump device by the switching device, the duty ratio of the current flowing through the motor device travels below the predetermined speed threshold value. The duty ratio of the current flowing through the motor device is reduced when the injection pressure of the washer liquid is reduced and the motor device is switched to the rear pump device by the switching device. However, since the duty ratio when the vehicle is traveling below the predetermined speed threshold is made larger, the spray pressure of the washer liquid is increased.
(Claim 2 )
The vehicle washer control device according to claim 2 is the vehicle washer control device according to claim 1, wherein the switching device is configured by an intelligent power switch device having a current sensor, and the detected value of the current sensor is the first value. When the current is larger than the predetermined current threshold, the current flowing through the motor device is stopped.
According to the vehicle washer control device according to claim 2 having such a configuration, the operation value is the same as that of the vehicle washer control device according to claim 1, and the detection value of the current sensor is changed to the first predetermined current by the switching device. When it is larger than the threshold value, the current flowing through the motor device is stopped. Here, if the detection value of the current sensor is larger than the first predetermined current threshold value, it is an overload due to the failure of the front pump device or the rear pump device or the clogging of the washer fluid injection port. It is assumed that a failure such as disconnection has occurred in the motor device.
(Claim 3 )
The vehicle washer control device according to claim 3 is the vehicle washer control device according to claim 1 or 2, further comprising an alarm output device that issues a warning by sound output or display output. It is comprised by the intelligent power switch apparatus which has a sensor, and the said alarm output apparatus alert | reports a warning, when the detected value of the said current sensor is smaller than a 2nd predetermined current threshold value.
According to the vehicle washer control device according to claim 3 having such a configuration, the operation value is the same as that of the vehicle washer control device according to claim 1 or 2, and the detected value of the current sensor is greater than the second predetermined current threshold value. If it is smaller, the alarm output device informs that the remaining amount of the washer liquid is small. Here, the detection value of the current sensor being smaller than the second predetermined current threshold means that the remaining amount of the washer liquid (the amount of the washer liquid in the washer tank storing the washer liquid) is small.

(Claim 1)
According to the vehicle washer control device of the first aspect, it is possible to drive both the pump devices of the front pump device and the rear pump device with one mechanism (more specifically, with one motor device). it can. As a result, both the glass members of the front side window glass member and the rear side window glass member can be cleaned by one mechanism. Further, since the pump device driven by the motor device is changed by the switching device, the washer liquid can be selectively injected to either the front window glass member or the rear window glass member. .
In addition, the amount and pressure of washer fluid injection can be adjusted according to the vehicle speed, so that the washer fluid can be applied to the wiper sliding areas of the front window glass member and the rear window glass member regardless of the vehicle speed. it can.
Further, when traveling at high speed, the injection amount and the injection pressure of the washer liquid on the front side can be reduced, and the injection amount and the injection pressure of the rear washer liquid can be increased. In other words, by changing the amount and pressure of washer fluid sprayed between the front and rear sides, the washer fluid can be accurately applied to the wiper sliding areas of the front window glass member and the rear window glass member even during high speed running. Can be applied.
(Claim 2)
According to the vehicular washer control device of the second aspect, in addition to the effect of the vehicular washer control device according to the first aspect, each pump device breaks down or the spray port of the washer liquid is clogged. As a result, the motor device can be prevented from failing.
(Claim 3)
According to the vehicular washer control device of the third aspect, in addition to the effect of the vehicular washer control device according to the first or second aspect, the driver can be notified that the remaining amount of the washer liquid is small. .

  Hereinafter, an example (example) of the best mode of the present invention will be described with reference to the accompanying drawings. Of course, the following examples are merely examples that are considered to be the best of the present invention, and the technical scope of the present invention is not limited to the following examples. For example, in the present invention, when the vehicle speed or current value is larger than a predetermined threshold value, the process is appropriately executed. When the vehicle speed or current value exceeds a predetermined threshold value, the process is appropriately executed. Also good.

  As shown in FIG. 1, a vehicle washer control device 100 according to an embodiment of the present invention is literally used in a state of being mounted (equipped) on a vehicle 1000. First, the vehicle 1000 will be described (the same applies to the second embodiment).

  The vehicle 1000 is provided with a riding part 1010 substantially at the center, and a front window glass member 1020 is provided in front of the riding part 1010. On the other hand, a rear window glass member 1030 is provided behind the riding portion 1010. The front window glass member 1020 is inclined upward toward the rear of the vehicle 1000, and the rear window glass member 1030 is inclined downward toward the rear of the vehicle 1000 or descends substantially vertically. ing.

  First, the first embodiment will be described with reference to FIGS.

(First embodiment)
The vehicle washer control device 100 uses one mechanism (more specifically, one motor device 150) to apply the washer liquid W to the front window glass member 1020 and the rear window glass member 1030. The operation switch 110, the front pump device 121, the rear pump device 122, the front injection nozzle 131, the rear injection nozzle 132, the washer tank 140, and the motor device 150 are switched. A gear 160, a battery 170, a power supply control unit 180, and an alarm output device 190 are provided. Of course, the vehicular washer control device described in the claims does not have to have all of these configurations.

  The operation switch 110 is provided within the reach of the driver of the riding unit 1010, and is connected to the power supply control unit 180 (more specifically, the ECU 186). The operation switch 110 is provided with a front injection mode position and a rear injection mode position. When the operation switch 110 is set to the front injection mode position, the washer liquid W is injected into the front window glass member 1020 and the rear side When in the injection mode position, the washer liquid W is injected onto the rear window glass member 1030.

  The front-side pump device 121 generates an injection force that injects the washer liquid W onto the front-side window glass member 1020, and the washer is generated via the front-side injection nozzle 131 by the injection force generated by the front-side pump device 121. Liquid is injected. Similarly, the rear pump device 122 generates an injection force for injecting the washer liquid W onto the rear window glass member 1030. The injection force generated by the rear pump device 122 causes the rear injection nozzle 132 to flow. The washer liquid is ejected through. The front-side injection nozzle 131 is mounted on the lower side of the front-side window glass member 1020, usually on the hood in front of the front-side window glass member 1020. The washer tank 140 stores the washer fluid W. The main tank is provided on the front side of the riding portion 1010 of the vehicle 1000, and the sub tank connected to the main tank is provided on the rear side. Here, the washer liquid W is a mixture of water and a detergent.

  The motor device 150 is constituted by a DC motor, and is disposed on the bridge side 181b of the power supply line 181 and is connected to the front pump device 121 and the rear pump device 122 via the switching gear 160. Yes. Then, the front side pump device 121 and the rear side pump device 122 are actuated by the rotational force of the motor device 150 (generates an injection force), and the washer liquid W stored in the washer tank 140 is discharged from the front side injection nozzle 131. It is sprayed toward the front side window glass member 1020. The motor device 150 is rotatable forward and backward, and drives the front pump device 121 during normal rotation, and drives the rear pump device 122 during reverse rotation. Here, it goes without saying that normal rotation and reverse rotation of the motor device 150 mean relative rotation directions.

  The switching gear 160 switches the pump device to be driven between the front pump device 121 and the rear pump device 122 according to the rotation direction of the motor device 150. More specifically, the switching gear 160 is configured by combining a plurality of gears, and drives the front pump device 121 when the motor device 150 is rotating forward, while driving the rear pump device 122 when the motor device 150 is reversed. To do. Of course, if the pump device to be driven can be changed in accordance with the rotation direction of the motor device 150, another switching mechanism may be employed instead of the switching gear 160. The switching device described in the claims includes at least a switching gear 160.

  The battery 170 is configured by a secondary battery, and stores electric power supplied to the motor device 150, the power supply control unit 180, and the like.

  The power supply control unit 180 controls the rotation direction and the rotation speed of the motor device 150. The power supply control unit 180 controls the power supply line 181 assembled in a bridge circuit shape and intelligent power switch devices (on the non-bridge side portions 181a). Hereinafter, for the sake of convenience, it is appropriately referred to as “IPS”) 182-185, and an electric control unit (hereinafter referred to as “ECU” for convenience) 186. The power supply line 181 is for supplying power to the motor device 150 and is connected to the battery 170 and grounded. The feeder 181 is assembled in a bridge circuit shape, and includes four non-bridge side portions 181a and one bridge side portion 181b.

  IPS 182 to 185 (in the drawing, symbols (1) to (4) are attached to identify IPS 182 to 185. As shown, (1) is 182 and (2) is 183. (3) 184 and (4) correspond to 185), the direction of the current flowing through the motor device 150 and the magnitude (effective value) of the current are changed. The IPS 182 includes a switching element unit 182a and a current detection sensor unit 182b. Similarly, the IPS 183 includes a switching element unit 183a and a current detection sensor unit 183b, the IPS 184 includes a switching element unit 184a and a current detection sensor unit 184b, and the IPS 185 includes a switching element unit 185a and a current detection unit. It is comprised by the sensor part 185b. The IPS 182 to 185 are respectively disposed on the non-bridge side portion 181a of the feeder line 181. The IPS 182 and the IPS 183 are connected in series, and similarly, the IPS 184 and the IPS 185 are connected in series. Note that IPS 182 to 185 correspond to the switching device described in the claims.

  The ECU 186 executes at least control of the vehicle washer control device 100, and includes a CPU, a memory, a timer, a D / A converter, an A / D converter, and the like (not shown). Based on at least the operation of the operation switch 110 and the detected current values of the current detection sensor units 182b to 185b, the IPS 182 to 185 (switching element units 182a to 185a) are turned on / off. This will be described in detail below.

  When the operation switch 110 is set to the front side injection mode position, the ECU 186 inputs the signal to the ECU 186, and based on this signal, the switching element portions 182a and 185a of the IPS 182 and 185 are turned on. Thereby, current flows in the order of IPS 182, motor device 150, and IPS 185, and motor device 150 rotates (forward rotation).

  Similarly, when the operation switch 110 is set to the rear side injection mode position, the ECU 186 inputs a signal to the ECU 186, and therefore, based on this signal, the switching elements 183a and 184a of the IPS 183 and 184 are turned on. is there. As a result, current flows in the order of IPS 183, motor device 150, and IPS 184, and motor device 150 rotates (reverses (reverses)).

  Further, the ECU 186 switches the switching element units 182a to 182a in the on state when the current flowing through the motor device 150, that is, the current detection values of the current detection sensor units 182b to 185b of the IPS 182 to 185 is larger than the first predetermined current threshold value. The current flowing through the motor device 150 is stopped by turning off 185a. As a result, even when an overcurrent exceeding the rated current flows to the motor device 150 due to an overload or the like, the motor device 150 itself may fail or the wiring such as the power supply line 181 may be melted. This can be prevented.

  The ECU 186 provides an alarm provided in the riding unit 1010 of the vehicle 1000 when the current flowing through the motor device 150, that is, the current detection values of the current detection sensor units 182b to 185b of the IPS 182 to 185 is smaller than the second predetermined current threshold value. An alarm is output by the output device 190. Here, when the amount stored in the washer tank 140 decreases, the current flowing through the motor device 150 also decreases, and the alarm output device 190 outputs a sound output (for example, a signal sound or voice guidance output from a speaker) or a display output (for example, a lamp). Or the sound output and the display output, the fact that the remaining amount of the washer liquid is low is notified.

  The operation will be described below. When the front window glass member 1020 is dirty and the operation switch 110 is set to the front injection mode position, this information is transmitted to the ECU 186 of the power supply control unit 180. The power supply control unit 180 rotates the motor device 150 to drive the front pump device 121 connected to the motor device 150, and the washer liquid W in the washer tank 140 is moved to the front side via the front injection nozzle 131. It sprays toward the window glass member 1020. The injection of the washer fluid W is stopped when the operation switch 110 is set to the stop position.

  Similarly, when the rear window glass member 1030 is dirty and the operation switch 110 is set to the rear injection mode position, this information is transmitted to the ECU 186 of the power supply control unit 180. The power supply control unit 180 rotates the motor device 150 (reverses that in the case of the front side) to drive the rear side pump device 122 connected to the motor device 150, so that the washer liquid W in the washer tank 140 is returned to the rear side. It sprays toward the rear side window glass member 1030 through the spray nozzle 132. The injection of the washer fluid W is stopped when the operation switch 110 is set to the stop position.

  As described above, in the vehicular washer control device 100 of the present invention, the washer liquid is sprayed to both the front and rear glass members 1020 and 1030 using one mechanism (one motor device). Is possible.

(Second embodiment)
Next, an embodiment (second embodiment) different from the above embodiment will be described with reference to FIGS. The vehicle washer control device 200 of the second embodiment controls the injection pressure and the injection amount of the washer liquid in accordance with the vehicle speed. In the description of the second embodiment, the same parts as those in the first embodiment will be denoted by the same reference numerals, the description thereof will be omitted or simplified, and different parts will be described with emphasis.

  The vehicle washer control device 200 of the second embodiment includes an operation switch 110, a front pump device 121, a rear pump device 122, a front injection nozzle 131, a rear injection nozzle 132, and a washer tank 140. , Motor device 150, switching gear 160, battery 170, power supply control unit 180, alarm output device 190, and vehicle speed detection sensor 290.

  The vehicle speed detection sensor 290 detects the traveling speed of the vehicle 1000 and is connected to a speedometer provided in the riding unit 1010 and is connected to the power supply control unit 180 (more specifically, the ECU 186). ing.

  ECU 186 performs PWM control (pulse control) on the current flowing through motor device 150 by repeatedly turning on and off switching element portions 182a to 185a at all times. That is, the ECU 186 and the IPS 182 to 185 (particularly, the switching element units 182a to 185a) correspond to the PWM control device described in the claims.

  The ECU 186 is configured to change the duty ratio of the pulse current (current flowing through the motor device 150) based on the detection value of the vehicle speed detection sensor 290. Specifically, when controlling the injection of the washer fluid W on the front side, if the detection value of the vehicle speed detection sensor 290 is greater than a predetermined speed threshold, it is determined that the vehicle is traveling at high speed, and the switching element portions 182a and 185a are turned off. By increasing the time, the duty ratio of the pulse current (current flowing through the motor device 150) is reduced. As a result, the rotational speed of the motor device 150 is reduced and the driving force of the front pump device 121 is reduced, so that the injection pressure and the injection amount of the washer liquid W injected through the front injection nozzle 131 are reduced. be able to. As a result, the washer liquid can be applied to the wiper sliding region of the front window glass member 1020 even during high-speed traveling.

  On the other hand, when controlling the injection of the washer fluid W on the rear side, if the detection value of the vehicle speed detection sensor 290 is larger than the predetermined speed threshold, it is determined that the vehicle is traveling at high speed, and the ON time of the switching element portions 183a and 184a is increased. Thus, the duty ratio of the pulse current is increased. As a result, the rotational speed of the motor device 150 increases and the driving force of the front pump device 121 increases, so that the injection pressure and the injection amount of the washer liquid W injected through the front injection nozzle 131 are increased. be able to. As a result, the washer liquid can be applied to the wiper sliding region of the rear window glass member 1030 even during high-speed traveling.

  The present invention has been described based on the embodiments. However, the embodiments of the present invention are not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. Needless to say, these improvements and modifications are also included in the technical scope of the present invention.

  For example, according to the present embodiment, the current detection sensor 182a is provided in all of the IPS 182 to 185, but one of the IPS 182, 183, 184, and 185 has the current detection sensor. One of IPS 184 and 183 may not have a current detection sensor.

Further, according to the present embodiment, PWM controller, although to adjust the pulse current by on-off of IPS182～185, it may be realized in other configurations (mechanisms). For example, in terms of hardware, it is easy to connect a normal pulse width modulator to the output of the vehicle speed detection sensor 290 or connect an input of a voltage controlled oscillator (VCO) and clip the output with a clipping circuit. realizable. In terms of software, it can be easily realized by A / D converting the output of the vehicle speed detection sensor 290 and setting a constant of the counter according to the value of this output.

  Furthermore, according to the second embodiment, the injection pressure is changed when the vehicle speed exceeds the predetermined speed threshold. However, the injection amount may be changed by adjusting the injection time. The amount may be the same. That is, not only the injection pressure but also the injection amount may be changed.

1 is a schematic view of a vehicle equipped with a vehicle washer control device according to a first embodiment of the present invention. It is a block diagram of the electric power feeding control part which comprises the vehicle washer control apparatus of 1st Example (The components and apparatus (configuration requirements) enclosed with the dashed-two dotted line do not comprise an electric power feeding control part, but understand an invention. Shown for ease). It is a timing chart of ON / OFF of the intelligent power switch (IPS) of the electric power feeding control part in 1st Example. It is the schematic of the vehicle equipped with the vehicle washer control apparatus of 2nd Example of this invention. It is a block diagram of the electric power feeding control part which comprises the vehicle washer control apparatus of 2nd Example. It is an on-off timing chart of the intelligent power switch (IPS) of the electric power feeding control part in 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Vehicle washer control apparatus 110 Operation switch 121 Front side pump apparatus 122 Rear side pump apparatus 131 Front side injection nozzle 132 Back side injection nozzle 140 Washer tank 150 Motor apparatus 160 Switching gear 170 Battery 180 Power supply control part 181 Power supply line 181b Bridge side 181a Non-bridge side 181c Power supply terminal 181d Ground terminal (earth terminal)
182 Intelligent Power Switch Device (IPS)
182a (IPS) switching element unit 182b (IPS) current detection sensor unit 183 Intelligent power switch device (IPS)
183a (IPS) switching element unit 183b (IPS) current detection sensor unit 184 Intelligent power switch device (IPS)
184a (IPS) switching element unit 184b (IPS) current detection sensor unit 185 Intelligent power switch device (IPS)
185a (IPS) switching element section 185b (IPS) current detection sensor section 186 Electric control unit (ECU)
190 Warning output device 200 Vehicle washer control device

290 Vehicle speed detection sensor 1000 Vehicle 1010 (Vehicle) riding part 1020 (Vehicle) front side window glass member 1030 (Vehicle) rear side window glass member W Washer liquid

Claims (3)

In a vehicle washer control device equipped in a vehicle having a front window glass member and a rear window glass member,
A front-side pump device for injecting washer fluid onto the front-side window glass member;
A rear pump device for injecting washer fluid to the rear window glass member;
A motor device for driving the front pump device and the rear pump device;
A switching device for switching the pump device driven according to the rotation direction of the motor device from the front pump device to the rear pump device or from the rear pump device to the front pump device;
A power supply line for supplying power to the motor device,
The feed line is assembled in a bridge circuit shape so that the rotation direction of the motor device can be changed, and the motor device is disposed on the bridge side portion of the feed line, while each non-bridge side portion Is equipped with a switching device,
Furthermore, a vehicle speed detection sensor that detects vehicle speed information;
A PWM control device that PWM-controls the current flowing through the motor device based on the detection result of the vehicle speed detection sensor;

When the detected value of the vehicle speed detection sensor is greater than a predetermined speed threshold value and is detected as high-speed running, the PWM control device is configured to switch the motor device when the motor device is switched to the front pump device by the switching device. The duty ratio of the current flowing through the device is made smaller than the duty ratio when traveling below the predetermined speed threshold, while the motor device is switched to the rear pump device by the switching device. The vehicle washer fluid control device is characterized in that the duty ratio of the current flowing in the vehicle is larger than the duty ratio when the vehicle is traveling at a speed equal to or less than the predetermined speed threshold .   The switching device includes an intelligent power switch device having a current sensor, and stops a current flowing through the motor device when a detection value of the current sensor is larger than a first predetermined current threshold value. The vehicle washer control device described. It is equipped with an alarm output device that outputs an alarm by sound output or display output,
The switching device is composed of an intelligent power switch device having a current sensor,
3. The vehicle washer control device according to claim 1, wherein the alarm output device issues a warning when a detection value of the current sensor is smaller than a second predetermined current threshold value. 4.

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