JP5290683B2 - Power window control device and power window control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power window control device capable of saving electric power while avoiding a decrease in function. <P>SOLUTION: In a control circuit, operation information (such as a position of window glass) for utilized during the next control, after a predetermined time has elapsed since the time a drive motor is stopped along with the completion of the operation of the window glass (since the time when a relay or a semiconductor switch in a drive circuit is turned off), is stored in an EEPROM; and a normal mode is changed into a power saving one after the completion of the storage of the operation information in the EEPROM. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a power window control device and a power window control method suitable for power saving.

In recent years, reduction in power consumption of in-vehicle batteries has been further demanded, and various technologies for reducing power consumption of vehicle equipment (electrical components) have been proposed as disclosed in, for example, Patent Document 1.
When the technology is applied to a power window device that is a vehicle device, the window ECU is sufficient to operate the window glass from the fully open to fully closed state by inputting an operation signal from an operation switch that opens and closes the window glass. The drive mode of the drive motor is controlled for only a short time, and the drive motor is controlled to switch to the power saving mode (sleep mode) after the time has elapsed.
JP 2006-264427 A

  However, since the drive motor is not driven every time the window glass is moved from fully open to fully closed, the time until the switch to the power saving mode after the drive motor is activated when the operation amount of the window glass is small. During this time, the window ECU consumes unnecessary power because it is in the normal mode.

  Therefore, if the operating state of the drive motor is detected and the mode of the window ECU is switched according to the operating state, the power consumption of the window ECU can be further reduced. However, since this power window device has a function to prevent pinching by the window glass during the closing operation, it appropriately learns data such as the position and operating load of the window glass and simply operates the drive motor. If the mode is switched according to the state, there is a possibility that the learning operation may be hindered.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power window control device and a power window control method capable of saving power while avoiding functional degradation. is there.

In order to solve the above-mentioned problem, the invention according to claim 1 is a control for performing a normal opening / closing control of the window glass by the drive motor and a pinching prevention control by the window glass based on various operation information of the window glass and the drive motor. A power window control device comprising a circuit and a mode switching function for switching from a power saving mode to a normal mode in each control, wherein the control circuit is configured to terminate the operation of the window glass. Accordingly, after a predetermined time has elapsed since the drive motor was stopped, the new operation information at that time is stored in the storage means for use in the next control, and the operation information stored in the storage means includes The position of the window glass that has stopped operating, and the position of the window glass when the window glass is operated. Includes the operating speed of the window glass relative to location, the control circuit, after the elapse of the predetermined time, stores the new the operation information at that time in said storage means, said normal mode after storage completion to the storage means The gist is that it is configured to switch to the power saving mode.

In the present invention, the control circuit includes operating information for use in the next control (the position of the window glass that has stopped operating , and the operating speed of the window glass relative to the position of the window glass when the window glass is operated). ) Is stored in the storage means after a predetermined time has elapsed since the drive motor was stopped with the end of the window glass operation, and the normal mode is switched to the power saving mode after the storage in the storage means is completed. That is, the control circuit saves power by matching the operation time of the normal mode to the operating state of the drive motor as much as possible. In the normal mode, for example, the operation of the drive motor and the wind glass is operated after the drive motor is stopped. Since the time required to store the operation information after waiting for a certain amount of time to be stored in the storage means is secured, the power is switched to the power saving mode. This prevents a decrease in the function of the pinching prevention control.

  According to a second aspect of the present invention, in the power window control device according to the first aspect, the operation of the drive motor and the window glass is completely performed after the control circuit stops the drive motor for the predetermined time. The gist of the present invention is that it is set including the time until stopping and the time when the writing of the operation information in the completely stopped state to the storage means is completed.

  In the present invention, the predetermined time includes a time from when the drive motor is stopped to a complete stop of the drive motor and window glass, and a time when writing of the operation information of the complete stop state to the storage means is completed. Therefore, accurate operation information is more reliably stored in the storage means, and the deterioration of the functions of the normal opening / closing control and the pinching prevention control is more reliably prevented.

The invention according to claim 3 performs normal opening / closing control of the window glass by the drive motor and prevention of pinching by the window glass on the basis of various operation information of the window glass and the drive motor, and is saved in each control. A power window control method in which switching from the power mode to the normal mode is performed, and the operation information after a predetermined time has elapsed from the time when the drive motor is stopped when the operation of the window glass ends is to be used in the next control. A storage step of storing in the storage unit; and a switching step of switching from the normal mode to the power saving mode after completion of storage in the storage unit in the storage step, and in the storage step, after the predetermined time has elapsed, The new operation information is stored in the storage means and stored in the storage means. The said activation information that the position of the window glass that has stopped the operation, and the gist that it includes the operation speed of the window glass relative to the position of the window glass when operated the window glass.

In the present invention, the same effect as that of the first aspect of the invention can be obtained.
According to a fourth aspect of the present invention, in the power window control method according to the third aspect, the operation of the drive motor and the window glass is completely stopped after the drive motor is stopped for the predetermined time. The gist of the present invention is that it is set including the time and the time at which the operation information in the completely stopped state is written to the storage means.

  In this invention, the same effect as that of the invention of claim 2 described above can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the power window control apparatus and power window control method which can aim at power saving, avoiding a function fall can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 shows the electrical configuration of the power window device of this embodiment. The power window motor (P / W motor in the figure) of this embodiment is used as a drive source of a power window device that opens and closes a window glass WG of an automobile, and the motor 10 is composed of a DC motor with a brush. A window ECU 11 for controlling the rotational drive is built in.

  The window ECU 11 includes various circuits including a drive circuit 12 and a control circuit 13. The drive circuit 12 receives a drive power supply + B from an in-vehicle battery (not shown), supplies the drive power supply + B to the drive motor 10 based on the control of the control circuit 13, and drives the motor 10.

  The control circuit 13 is composed of a microcomputer including a CPU, and operates based on supply of operation power generated by the power circuit 14 based on drive power + B from the battery. An operation signal corresponding to the switch operation, that is, a command signal for opening and closing the window glass WG is input to the control circuit 13 via an input circuit 15 from an operation switch (seat SW in the figure) 20 provided around the seat. Is done. Incidentally, although not shown, the operation switch 20 for the driver's seat is also provided with an operation switch for opening and closing the window glass WG of a seat other than the driver's seat. The control circuit 13 controls the supply of the drive power source + B to the drive motor 10 in the drive circuit 12 based on the input of the operation signal by the opening or closing operation of the master switch 20, and opens or closes the window glass WG. Therefore, the rotation of the drive motor 10 is controlled (normal opening / closing control).

  The control circuit 13 receives a pulse-like rotation detection signal synchronized with the rotation of the drive motor 10 from the Hall IC 16. The Hall IC 16 is disposed in the vicinity of a detection object such as a sensor magnet installed on a rotating portion (for example, a rotating shaft) of the drive motor 10, and generates a pulsed rotation detection signal with the sensor magnet, and sends it to the control circuit 13. Output. The control circuit 13 detects the rotation speed of the motor 10, that is, the operating speed of the window glass WG, the position of the window glass WG, and the like based on the pulse-shaped rotation detection signal input as the drive motor 10 rotates. To do.

  Further, based on the position of the window glass WG and the detection of the rotation speed of the drive motor 10, the control circuit 13 determines whether or not foreign matter is pinched by the window glass WG that is closed. That is, when a foreign object is nipped at the position of the window glass WG in front of the fully closed position, the one where the rotational speed of the drive motor 10 is changing around a predetermined speed is significantly reduced. The control circuit 13 detects that the rotational speed of the drive motor 10 is significantly reduced, and determines that the window glass WG has been caught, and drives the window glass WG that is closed to open a predetermined amount. The pinch prevention control is performed to reverse the rotation of the motor 10 so that the pinched foreign matter can be released.

  Further, in performing the normal opening / closing control and the pinching prevention control, the control circuit 13 needs to grasp the position of the window glass WG (window position information), the operation speed (sliding learning value) with respect to the position of the window glass WG, and the like. However, such information is lost before shipment or after battery replacement. Therefore, initial setting is performed before shipment, after battery replacement, etc., and the origin position setting of the window glass WG that first associates the actual position of the window glass WG with the detection position is performed, and the window glass whose operation has stopped is performed. The position of the WG is stored in the EEPROM 17 as window position information. Further, the window glass WG is caused to reciprocate once, and the current operation speed is associated with the position of the window glass WG, and stored in the EEPROM 17 as a sliding learning value (information). Further, whether or not such initialization has been completed is stored in the EEPROM 17 as initialization completion information.

  The window position information and the sliding learning value (including initialization completion information in this case) are updated to new information after the window glass WG is stopped (after the drive motor 10 is stopped). It is stored in the EEPROM 17 so as to be rewritten. As the sliding learning value, an average value with the past value or the like is stored. Such rewriting affects the normal opening / closing control and especially the pinching prevention control because the window position information and the sliding learning value are affected by the deterioration over time and the situation of the vehicle at that time (stopped or running). This is done to prevent it from occurring. Further, in the present embodiment, the timing of storage in the EEPROM 17 is performed after a certain time (for example, 2 [s]) after the relay or the semiconductor switch in the drive circuit 12 is turned off. This is in consideration of the time required for the drive motor 10 and the window glass WG to operate and stop completely, and the time for the writing to the EEPROM 17 to be completed, and the drive motor 10 and the window glass WG. It is ensured that it will be rewritten with accurate information when is completely stopped.

  Such a control circuit 13 of the present embodiment has a mode switching function between a normal mode and a power saving mode (sleep mode), and is configured to be able to save power to reduce power consumption of the in-vehicle battery. . Specifically, the control circuit 13 wakes up from the power saving mode (sleep mode) and switches to the normal mode based on the input of the operation signal by opening or closing the master switch 20, and performs opening / closing control or the like. . Thereafter, in order to stop the operation of the window glass WG, a power saving mode (sleep mode) is started after various information has been written to the EEPROM 17 after a certain time (for example, 2 [s]) after the relay or semiconductor switch in the drive circuit 12 is turned off. Mode).

The mode switching of the control circuit 13 is performed according to the processing flow of FIG.
In step S11, when the operation signal by the opening or closing operation of the master switch 20 is input, the process proceeds to step S12, a wake-up process is performed, and the power saving mode (sleep mode) is switched to the normal mode.

  In step S13, normal opening / closing control and pinching prevention control (motor drive control) are performed based on an operation signal generated by opening or closing the master switch 20. Then, when the operation of the window glass WG is stopped (when the operation of the drive motor 10 is stopped), the process proceeds to step S14.

  In step S14, the drive motor 10 is stopped, that is, a certain time (for example, 2 [s]) is counted from the edge of a signal for turning off a relay or a semiconductor switch for supplying power to the drive motor 10 in the drive circuit 12. When a certain time has elapsed from the OFF, the process proceeds to step S15.

  In step S15, the operation due to the inertia of the drive motor 10 and the window glass WG is stopped after a lapse of a certain time from the OFF operation, and the current sliding learning value (information is assumed that the drive motor 10 and the window glass WG are completely stopped. ), A request for writing window position information and initialization completion information is set, and the EEPROM 17 is controlled in step S16 to write the information.

  In step S17, when the writing to the EEPROM 17 is completed, the process proceeds to step S18 to switch to the power saving mode (sleep mode) (sleep input). When the master switch 20 is operated again, the process is repeated from the step S11. As described above, the control circuit 13 of the present embodiment is configured to perform mode switching between the normal mode and the power saving mode.

Next, characteristic effects of the present embodiment will be described.
(1) The control circuit 13 of the present embodiment uses the operation information (the position of the window glass WG, etc.) to be used at the time of the next control after the drive motor 10 is stopped when the operation of the window glass WG ends (the drive circuit). 12 is stored in the EEPROM 17 after a predetermined time has elapsed (after turning off the relay or semiconductor switch in the circuit 12), and after the storage in the EEPROM 17 is completed, the normal mode is switched to the power saving mode. That is, the control circuit 13 of the present embodiment saves power by matching the operation time of the drive motor 10 as much as possible to the normal mode, while the drive motor 10 and the drive motor 10 are stopped after the drive motor 10 is stopped in the normal mode. The time required to store the operation information in the EEPROM 17 after the elapse of a predetermined time when the operation due to the inertia of the window glass WG is settled is ensured to switch to the power saving mode. It is possible to memorize, and it is possible to prevent deterioration of the functions of normal opening / closing control and pinching prevention control.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the time for storing in the EEPROM 17 after the drive motor 10 is stopped (after the relay or semiconductor switch in the drive circuit 12 is turned off) is not limited to 2 [s] described above. You may change suitably based on the operation amount by the inertia of WG or the drive motor 10, etc.

  In the above embodiment, the sliding learning value, the window position information, and the initialization completion information are stored as what is stored in the EEPROM 17 when the drive motor 10 is stopped at any time. However, the information to be stored is limited to this. For example, the initialization completion information may be stored only at the time of initial setting. Further, other information may be stored.

  In the above embodiment, the EEPROM 17 is used as the storage means, but a storage device other than the EEPROM may be used.

It is an electrical block diagram of the power window control of this embodiment. It is a flowchart for demonstrating the mode switching process of a control circuit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Drive motor, 13 ... Control circuit, 17 ... EEPROM (memory | storage means), WG ... Window glass.

Claims (4)

It is equipped with a control circuit that performs normal opening / closing control of the window glass by the drive motor and prevention of pinching by the window glass based on various operation information of the window glass and the drive motor, and switches from the power saving mode to the normal mode at each control. A power window control device provided in the control circuit with a mode switching function for switching,
The control circuit is configured to store the new operation information at that time in the storage means to be used in the next control after a predetermined time has elapsed since the drive motor was stopped with the end of the operation of the window glass , The operation information stored in the storage means includes the position of the window glass that has stopped operating, and the operation speed of the window glass relative to the position of the window glass when the window glass is operated,
The control circuit is configured to store the new operation information at that time in the storage unit after the predetermined time has elapsed, and to switch from the normal mode to the power saving mode after completion of the storage in the storage unit. Features a power window control device. In the power window control device according to claim 1,
The predetermined time is the time from when the control circuit stops the drive motor to the time when the operation of the drive motor and the window glass completely stops, and the operation information of the complete stop state to the storage means. A power window control device characterized in that it is set including a time at which writing is completed. Based on various operating information of the window glass and the drive motor, the window glass is normally opened / closed by the drive motor and the window glass is prevented from being caught, and the power saving mode is switched to the normal mode at each control. A power window control method performed,
A storage step of storing the operation information after a lapse of a predetermined time from the stop of the drive motor with the end of the operation of the window glass in a storage means for use at the next control time ;
A switching step of switching from the normal mode to the power saving mode after completion of storage in the storage means in the storage step;
In the storing step, after the predetermined time has elapsed, the new operation information at that time is stored in the storage means, and the operation information stored in the storage means includes the position of the window glass that has stopped operating, and the A method for controlling a power window, characterized in that an operating speed of the window glass relative to a position of the window glass when the window glass is operated is included . In the power window control method according to claim 3,
The predetermined time is the time from when the drive motor is stopped until the operation of the drive motor and the window glass is completely stopped, and the writing of the operation information of the complete stop state to the storage means is completed. A power window control method characterized by being set including time.

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