JP2015203238A - Door opening-closing control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door opening-closing control device capable of assisting so that an operator can operate a door for opening-closing with the excellent touch.SOLUTION: A power back door control device 10 comprises a control part 1 for controlling driving of a motor 20 for opening-closing a back door 30, a position detection part 1a for detecting an opening-closing position of the back door 30, a speed calculation part 1b for calculating an opening-closing speed of the back door 30 based on a time variation in the opening-closing position and a target auxiliary force calculation part 1e for calculating target auxiliary force based on the opening-closing position and the opening-closing speed of the back door 30. The control part 1 controls the driving of the motor 20 based on the target auxiliary force so as to assist opening-closing operation of the back door 30. The target auxiliary force calculated by the target auxiliary force calculation part 1e when the opening-closing position of the back door 30 exists in an intermediate position, is larger than the target auxiliary force calculated by the target auxiliary force calculation part 1e when the opening-closing position of the back door 30 exists in the full opening position vicinity and the full closing position vicinity.

Description

  The present invention relates to a door opening / closing control device that applies an operation assisting force when a door such as a back door or a slide door of a vehicle is manually opened and closed.

  As a door opening / closing control device mounted on a vehicle, for example, there are a power back door (also referred to as “power tail gate”) control device and a power sliding door control device. These door open / close control devices use a motor as an actuator, rotate the motor, operate a door open / close mechanism, and open / close a back door and a slide door. There is also a door opening / closing control device with a power assist function that allows the operator to open and close the door with a small force by applying an operation assisting force with an actuator when the door is manually opened and closed. (For example, Patent Documents 1 to 4).

  In the door opening / closing control device of Patent Document 1, when the slide door reaches the fully closed position or near the fully open position, the door speed is reduced in order to reduce the impact when the slide door suddenly stops at the fully closed position or the fully open position. When is larger than a predetermined value, the target door speed is switched to a smaller value. Then, the motor drive is controlled so that the actual door speed approaches the target door speed.

  In the door opening and closing control device of Patent Document 2, in order to realize a comfortable operation feeling, the amount of electric power supplied to the motor is adjusted based on changes in the current flowing through the motor and the moving speed of the sliding door, thereby opening and closing the sliding door. Control the speed. Specifically, when the change in the moving speed of the sliding door is within a threshold range, steady control is performed to maintain the amount of power supplied to the motor. Further, acceleration control is performed when the motor current value is smaller than the first threshold value, and deceleration control is performed when the motor current value is larger than the second threshold value.

  In the door opening / closing control device of Patent Document 3, since the opening / closing of the sliding door is shifted from manual to automatic regardless of the position of the sliding door, the phase generated from the pulse generating means is shifted according to the opening / closing of the sliding door. Based on the two pulses, the operating direction (opening / closing direction) of the sliding door is determined. Then, the motor is driven in the opening direction or the closing direction in accordance with the operation direction.

  In the door opening / closing control device of Patent Document 4, the operation amount of the handle for opening and closing the back door is detected, and the driving of the motor is controlled according to the operation amount, so that a part of the operation force required for the opening / closing operation of the back door To assist. Further, in order to reduce the size of the apparatus using a small output motor, the opening / closing operation is assisted by the motor within the range up to the half-open state of the back door.

JP 2008-95407 A JP 2011-236697 A JP 2001-193353 A JP 2011-26940 A

  Due to the characteristics of the door opening / closing mechanism and the action of external force, the load applied to the door differs between the vicinity of the fully open position and the vicinity of the fully closed position, and the intermediate position thereof. For example, in the case of a vehicle back door, due to the characteristics of the back door opening / closing mechanism, frictional force, gravity, etc., the load on the back door is greater than the load on the back door near the fully open position or near the fully closed position. Such a load is larger. For this reason, when manually opening and closing the back door, a larger operating force is required in the intermediate position than in the vicinity of the fully open position or the fully closed position. As a result, the operator feels that the back door is heavy at the intermediate position, and the operation feeling is not good.

  The subject of this invention is providing the door opening / closing control apparatus which can assist so that an operator can open and close a door pleasantly.

  The door opening and closing control device according to the present invention is based on a control unit that controls driving of an actuator that opens and closes a door, a position detection unit that detects an opening and closing position of the door, and a time change of the opening and closing position detected by the position detection unit, A speed calculation unit that calculates the opening / closing speed of the door, and a target auxiliary force calculation unit that calculates a target auxiliary force based on the opening / closing position detected by the position detection unit and the opening / closing speed calculated by the speed calculation unit. The control unit controls driving of the actuator so as to assist the opening / closing operation of the door based on the target assisting force calculated by the target assisting force calculating unit. Here, when the door opening / closing position is in the vicinity of the fully open position, the door opening / closing position is at an intermediate position between the vicinity of the fully open position and the vicinity of the fully closed position based on the target auxiliary force calculated by the target auxiliary force calculation unit. The target assist force calculated by the target assist force calculation unit is larger. The target auxiliary force calculated by the target auxiliary force calculation unit when the door opening / closing position is at the intermediate position from the target auxiliary force calculated by the target auxiliary force calculation unit when the door opening / closing position is in the vicinity of the fully closed position. Is bigger.

  According to the above, even if the load applied to the door varies depending on the door opening / closing position due to the characteristics of the door opening / closing mechanism and external force, the target auxiliary force for assisting the door opening / closing operation corresponds to the door opening / closing position. Change. Specifically, the target assist force is set larger at the intermediate position than at the fully open position or the fully closed position. For this reason, even when a heavy load is applied to the door at the intermediate position, when the door is manually opened and closed, a sufficient assisting force is applied by the actuator at the intermediate position. I do not feel. From the above, it is possible to assist the operator to open and close the door with a good touch.

  Further, according to the present invention, in the door opening / closing control device, when the door opening / closing position is the same, the door opening / closing speed is higher than the target auxiliary force calculated by the target auxiliary force calculating unit when the door opening / closing speed is low. The target assist force calculated by the target assist force calculation unit may be larger.

  According to the present invention, in the door opening / closing control device, the target auxiliary force calculation unit calculates the first auxiliary force component based on the opening / closing position detected by the position detection unit, and based on the opening / closing speed detected by the speed calculation unit. The target auxiliary force may be calculated by calculating the second auxiliary force component and multiplying the first auxiliary force component and the second auxiliary force component.

  In the present invention, the door opening / closing control device further includes a current detection unit that detects a drive current of the actuator, and the control unit detects the target auxiliary force calculated by the target auxiliary force calculation unit and the current detection unit. The driving of the actuator may be controlled based on the driving current.

  Furthermore, in this invention, a door may consist of a back door of a vehicle, and a door opening / closing control apparatus may be comprised from the power back door control apparatus which provides an operation assistance force with an actuator at the time of opening / closing operation of a back door.

  ADVANTAGE OF THE INVENTION According to this invention, the door opening / closing control apparatus which can assist so that an operator can open and close a door pleasantly can be provided.

It is the figure which showed the structure of the power back door control apparatus by embodiment of this invention. It is the figure which showed an example of the back door. It is the flowchart which showed the main process of the power back door control apparatus of FIG. It is the flowchart which showed the detail of the mode discrimination | determination process of FIG. It is the flowchart which showed the detail of the automatic opening / closing process of FIG. It is the block diagram which showed the detail of the automatic opening / closing process of FIG. It is the flowchart which showed the detail of the power assist process of FIG. It is the block diagram which showed the detail of the power assist process of FIG. It is the figure which showed the detail of the target auxiliary force calculation part of FIG. It is the figure which showed the detail of the position characteristic of FIG. It is the figure which showed the detail of the speed characteristic of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

  First, the configuration of the present embodiment will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a diagram illustrating a configuration of the power back door control device 10. FIG. 2 is a diagram illustrating an example of the back door 30.

  In FIG. 1, a power back door control device 10 is incorporated in a power back door system 100 together with a motor 20, a BD (back door) opening / closing mechanism 21, and a back door 30. The power back door system 100 is mounted on an automobile.

  The power back door control device 10 is provided in the vehicle body 31 in FIG. A BD opening / closing mechanism 21 for opening and closing the back door 30 is provided on the vehicle body 31 and the back door 30. The motor 20 is a power source of the BD opening / closing mechanism 21 and is provided on the vehicle body 31.

  As shown in FIG. 2, the back door 30 is a flip-up type door provided on the rear surface of the vehicle body 31 of the automobile. The back door 30 opens when the lower end swings upward about the rotation shaft 32 at the upper end, and conversely closes when the lower end swings downward. In FIG. 2, the back door 30 in the fully closed position is indicated by a solid line, the back door 30 in the fully open position is indicated by a one-dot chain line, and two back doors 30 in an intermediate position between the fully closed position and the fully open position are shown. Shown with a chain line. The power back door control device 10 drives the motor 20 by normal rotation or reverse rotation to operate the BD opening / closing mechanism 21 to automatically open / close the back door 30 (automatic opening / closing function).

  The back door 30 can be manually opened and closed by grasping a lower end portion or a grip portion (not shown). When the back door 30 is manually opened and closed, the power back door control device 10 applies an operation assisting force by the motor 20 so that the operator can open and close the back door 30 with a small force (power). Assist function).

  The power back door control device 10 is an example of the “door opening / closing control device” of the present invention. The back door 30 is an example of the “door” in the present invention. The motor 20 is an example of the “actuator” in the present invention.

  The power back door control device 10 includes a control unit 1, a motor drive unit 2, a driver's seat operation unit 3, a rear operation unit 4, a communication unit 5, a remote controller 6, a pulse generator 7, a full-closed detection SW (switch). 8 and a fully open detection SW (switch) 9 are provided.

  The control unit 1 is composed of a microcomputer. The control unit 1 includes a position detection unit 1a, a speed calculation unit 1b, a target speed calculation unit 1c, a speed control unit 1d, a target auxiliary force calculation unit 1e, an auxiliary force control unit 1f, a mode determination unit 1g, and a manual opening / closing detection unit. 1h is provided. Each of these units 1a to 1h is configured by software, for example, but may be configured by hardware as another example.

  The motor drive unit 2 includes a drive circuit for driving the motor 20 with a PWM (pulse width modulation) signal. The control unit 1 controls the driving of the motor 20 by the motor driving unit 2. The motor drive unit 2 is provided with a current detection unit 2 a that detects a current flowing through the motor 20 (hereinafter referred to as “motor current”). The detection of the motor current by the current detection unit 2a is performed appropriately or at a predetermined cycle.

  The driver's seat operation unit 3 includes switches and buttons provided in the driver's seat of the automobile. The rear operation unit 4 includes a switch, a button, and the like provided behind the vehicle body 31 (outside the vehicle). The driver's seat operation unit 3 and the rear operation unit 4 are provided with BD opening / closing SWs (switches) 3b and 4b operated to instruct the opening / closing or stopping of the back door 30, respectively.

  The communication unit 5 includes an antenna and a circuit for performing wireless communication (LF (Low Frequency) signal or UHF (Ultra High Frequency) signal communication) with the remote controller 6. The remote controller 6 comprises a passive entry system FOB key and is carried by the user.

  The remote controller 6 is also provided with a BD opening / closing SW (switch) 6b that is operated to instruct to open / close or stop the back door 30. When the BD opening / closing SW 6b is operated by the user, an operation signal indicating the operation state is wirelessly transmitted from the remote controller 6, and the operation signal is received by the communication unit 5.

  The pulse generator 7 is composed of, for example, a two-phase rotary encoder, and is provided in the motor 20 or the BD opening / closing mechanism 21. The pulse generator 7 outputs two pulse signals whose phases are shifted to the control unit 1 according to the rotation state of the motor 20 or the operation state of the BD opening / closing mechanism 21.

  The rotating state of the motor 20, the operating state of the BD opening / closing mechanism 21, and the opening / closing state of the back door 30 are linked. Therefore, the position detection unit 1a of the control unit 1 detects two pulse signals output from the pulse generator 7, and based on the pulse signals, the opening / closing position of the back door 30 (hereinafter referred to as “door position”). Is detected. The speed calculation unit 1b calculates the opening / closing speed of the back door 30 (hereinafter referred to as “door speed”) based on the time change of the door position detected by the position detection unit 1a. The detection of the door position by the position detection unit 1a and the calculation of the door speed by the speed calculation unit 1b are performed appropriately or at any time in a predetermined cycle.

  The fully closed detection SW (switch) 8 and the fully open detection SW (switch) 9 are provided at the rear portion of the vehicle body 31. The fully closed detection SW 8 detects that the back door 30 is fully closed and outputs a detection signal to the control unit 1. The fully open detection SW 9 detects that the back door 30 is fully opened and outputs a detection signal to the control unit 1. The position detector 1a detects that the back door 30 is in the fully closed position or the fully open position based on the output signal from the fully closed detection SW8 or the fully open detection SW9.

  The control unit 1 controls the driving of the motor 20 via the motor driving unit 2 in accordance with the operation of the BD opening / closing SW 3b, 4b, 6b. Specifically, the control unit 1 rotates the motor 20 by the motor driving unit 2 according to the opening / closing operation of the BD opening / closing SW 3b, 4b, 6b, and the motor according to the stopping operation of the BD opening / closing SW 3b, 4b, 6b. The motor 20 is stopped by the drive unit 2. Thereby, the back door 30 opens and closes automatically or stops.

  When the motor 20 is driven in accordance with the opening / closing operation of the BD opening / closing SW 3b, 4b, 6b, a target for the target speed calculation unit 1c to automatically open / close the back door 30 based on the door position detected by the position detection unit 1a. Calculate the speed. Then, based on the target speed and the door speed calculated by the speed calculation unit 1b, the speed control unit 1d controls the speed of the motor 20.

  The manual opening / closing detection unit 1h detects that the back door 30 has been manually opened / closed based on the door speed calculated by the speed calculation unit 1b. Specifically, when the speed controller 1d is not controlling the driving of the motor 20, if the door speed calculated by the speed calculator 1b is not 0, the manual opening / closing detector 1h It is determined that the opening / closing operation has been performed.

  When the manual opening / closing operation of the back door 30 is detected by the manual opening / closing detection unit 1h, the control unit 1 controls the driving of the motor 20 via the motor driving unit 2 so as to assist the manual opening / closing operation of the back door 30. To do. Specifically, the target auxiliary force calculating unit 1e calculates the target auxiliary force based on the door position detected by the position detecting unit 1a and the door speed calculated by the speed calculating unit 1b. Then, based on the target auxiliary force and the motor current detected by the current detection unit 2 a, the auxiliary force control unit 1 f controls the driving of the motor 20 via the motor driving unit 2.

  The mode determination unit 1g controls the motor 20 based on the door position detected by the position detection unit 1a, the door speed calculated by the speed calculation unit 1b, and the operation state of the BD opening / closing SWs 3b, 4b, 6b. Determine the mode.

  Next, operation | movement of the power back door control apparatus 10 is demonstrated, referring FIGS. 3-11.

  FIG. 3 is a flowchart showing a main process of the power back door control device 10. If the control unit 1 determines that the back door 30 is at an intermediate position between the fully closed position and the fully open position based on the door position detected by the position detection unit 1a (step S1: YES in FIG. 3), the mode determination is performed. Mode discrimination processing is performed by the unit 1g (step S2 in FIG. 3).

  FIG. 4 is a flowchart showing details of the mode determination process. When an opening / closing operation is performed by any of the BD opening / closing SWs 3b, 4b, 6b (step S11 in FIG. 4: YES), the mode determination unit 1g determines that the transition destination is the automatic opening / closing mode (step S12 in FIG. 4). ).

  Further, when the automatic opening / closing operation is not performed by the BD opening / closing SW 3b, 4b, 6b (step S11: NO in FIG. 4), when the back door 30 is manually opened / closed, the door calculated by the speed calculation unit 1b The speed becomes a value other than 0 (step S13 in FIG. 4: NO). Accordingly, the manual opening / closing detection unit 1h determines that the manual opening / closing operation of the back door 30 has been performed (step S14 in FIG. 4), and the mode determination unit 1g determines that the transition destination is the power assist mode (FIG. 4). Step S15).

  In addition, when the automatic opening / closing operation is not performed by the BD opening / closing SW 3b, 4b, 6b (step S11: NO in FIG. 4), the back door 30 is not manually opened / closed and is stationary, and the speed calculating unit The door speed calculated in 1b becomes 0 (step S13 in FIG. 4: YES). As a result, the manual opening / closing detection unit 1h determines that the manual opening / closing operation of the back door 30 has not been performed (step S16 in FIG. 4), and the mode determination unit 1g determines that the transition destination is the stop mode (FIG. 4 step S17).

  In addition, when a stop operation is performed in any of the BD opening / closing SWs 3b, 4b, 6b (step S11: NO in FIG. 4), if the door speed is 0 (step S13: YES in FIG. 4), manual opening / closing is performed. The detection unit 1h determines that the manual opening / closing operation of the back door 30 has not been performed (step S16 in FIG. 4). Then, the mode determination unit 1g determines that the transition destination is the stop mode (step S17 in FIG. 4).

  In accordance with the determination result in the mode determination process of FIG. 4, when the control unit 1 shifts to the stop mode from step S <b> 3 of FIG. Thereby, the back door 30 remains stationary at the intermediate position.

  Further, according to the determination result in the mode determination process of FIG. 4, when the control unit 1 shifts to the automatic opening / closing mode from step S3 of FIG.

  FIG. 5 is a flowchart showing details of the automatic opening / closing process. FIG. 6 is a block diagram showing details of the automatic opening / closing process. When the automatic opening / closing process is started, the control unit 1 confirms the operation content of the BD opening / closing SWs 3b, 4b, 6b (step S20 in FIG. 5). At this time, when the control unit 1 confirms that the opening operation has been performed by any one of the BD opening / closing SWs 3b, 4b, and 6b (step S20 in FIG. 5: opening operation), as shown in FIG. The unit 1c calculates a target speed for opening operation based on the door position detected by the position detection unit 1a (step S21 in FIG. 5). Next, the speed controller 1d drives the motor 20 in the opening direction (for example, forward rotation) while performing speed control (step S22 in FIG. 5).

  Specifically, the speed control unit 1d uses the motor drive unit 2 to input voltage to the motor 20 so that the target speed calculated by the target speed calculation unit 1c matches the door speed calculated by the speed calculation unit 1b. To drive the motor 20 in the opening direction. Thereby, the BD opening / closing mechanism 21 is operated, and the back door 30 is automatically opened.

  After this, if there is no operation of the BD opening / closing SW 3b, 4b, 6b (step S23 in FIG. 5: NO), until the back door 30 reaches the fully open position (step S25: NO in FIG. 5), steps S21 to S25 are performed. The process is repeated.

  Even if any one of the BD opening / closing SWs 3b, 4b, 6b is operated (step S23 in FIG. 5: YES), if it is an opening operation (step S24: YES in FIG. 5), the back door 30 is in the fully open position. The process of steps S21 to S25 is repeated until it reaches (step S25: NO in FIG. 5).

  If any one of the BD opening / closing SWs 3b, 4b, 6b is operated (step S23 in FIG. 5: YES) and it is an operation other than the opening operation (stop operation or closing operation) (step S24 in FIG. 5: NO), the previously accepted opening operation becomes invalid. For this reason, the control part 1 stops the drive of the motor 20 (step S26 of FIG. 5), and complete | finishes an automatic opening / closing process. Thereafter, the main process of FIG. 3 is executed again, and the mode shifts to a mode (stop mode or auto open / close mode) according to the operation of the BD open / close SW 3b, 4b, 6b.

  As another example, when the BD opening / closing SW 3b, 4b, 6b is operated in step S23 of FIG. 5, the driving of the motor 20 is temporarily stopped regardless of whether the operation is an opening operation or a closing operation. Alternatively, the rotation direction of the motor 20 may be reversed.

  Further, it is assumed that the back door 30 has reached the fully opened position without any operation other than the opening operation performed by the BD opening / closing SWs 3b, 4b, 6b (step S23: NO or step S24: YES in FIG. 5). Then, the control unit 1 determines that the back door 30 is in the fully open position based on the door position detected by the position detection unit 1a (step S25 in FIG. 5: YES), stops driving the motor 20 (Step S26 in FIG. 5), the automatic opening / closing process is terminated.

  In addition, immediately after the start of the automatic opening / closing mode, when the control unit 1 confirms that the closing operation is performed by any of the BD opening / closing SWs 3b, 4b, 6b (step S20 in FIG. 5: closing operation), the target speed calculation unit 1c calculates a target speed for the closing operation based on the door position (step S31 in FIG. 5). Next, the speed control unit 1d drives the motor 20 in the closing direction (for example, reverse rotation) while performing speed control (step S32 in FIG. 5).

  Specifically, the speed control unit 1d uses the motor drive unit 2 to input voltage to the motor 20 so that the target speed calculated by the target speed calculation unit 1c matches the door speed calculated by the speed calculation unit 1b. To drive the motor 20 in the closing direction. Thereby, the BD opening / closing mechanism 21 is operated, and the back door 30 is automatically closed.

  Thereafter, if there is no operation on the BD opening / closing SW 3b, 4b, 6b (step S33 in FIG. 5: NO), steps S31 to S35 until the back door 30 reaches the fully closed position (step S35 in FIG. 5: NO). The process is repeated.

  Even if any one of the BD opening / closing SWs 3b, 4b, 6b is operated (step S33 in FIG. 5: YES), if it is a closing operation (step S34: YES in FIG. 5), the back door 30 is fully closed. Until the position is reached (step S35 in FIG. 5: NO), the processes of steps S31 to S35 are repeated.

  If any one of the BD opening / closing SWs 3b, 4b, 6b is operated (step S33 in FIG. 5: YES) and it is an operation other than the closing operation (stop operation or opening operation) (step S34 in FIG. 5). NO), the previously accepted closing operation becomes invalid. For this reason, the control part 1 stops the drive of the motor 20 (step S26 of FIG. 5), and complete | finishes an automatic opening / closing process. Thereafter, the main process of FIG. 3 is executed again, and the mode shifts to a mode (stop mode or auto open / close mode) according to the operation of the BD open / close SW 3b, 4b, 6b.

  As another example, when the BD opening / closing SW 3b, 4b, 6b is operated in step S33 of FIG. 5, the driving of the motor 20 is temporarily stopped regardless of whether the operation is an opening operation or a closing operation. Alternatively, the rotation direction of the motor 20 may be reversed.

  In addition, it is assumed that the back door 30 has reached the fully closed position without performing any operation other than the closing operation on the BD opening / closing SW 3b, 4b, 6b (step S33: NO or step S34: YES in FIG. 5). Then, the control unit 1 determines that the back door 30 is in the fully closed position based on the door position detected by the position detection unit 1a (step S35 in FIG. 5: YES), and stops driving the motor 20. (Step S26 in FIG. 5), the automatic opening / closing process is terminated.

  On the other hand, according to the determination result in the mode determination process of FIG. 4, when the process proceeds from step S3 of FIG. 3 to the power assist mode, the control unit 1 executes the power assist mode process (step S5 of FIG. 3).

  FIG. 7 is a flowchart showing details of the power assist process. FIG. 8 is a block diagram showing details of the power assist process. When the power assist process is started, the control unit 1 determines the operating direction (opening / closing direction) of the back door 30 based on the time change of the door position detected by the position detection unit 1a (step S41 in FIG. 7).

  Here, it is assumed that the control unit 1 determines that the operation direction of the back door 30 is the opening direction (step S41 in FIG. 7: opening direction). Then, as shown in FIG. 8, the target auxiliary force calculating unit 1e generates the target auxiliary force for opening operation based on the door position detected by the position detecting unit 1a and the door speed calculated by the speed calculating unit 1b. Calculation is made (step S42 in FIG. 7).

  FIG. 9 is a block diagram showing details of the target auxiliary force calculation unit 1e. The target auxiliary force calculation unit 1e is provided with a position characteristic 1p indicating a first auxiliary force component according to the door position, a speed characteristic 1v indicating a second auxiliary force component according to the door speed, and a multiplier 1m. ing. When the door position detected by the position detection unit 1a is input to the target auxiliary force calculation unit 1e, a first auxiliary force component corresponding to the door position is calculated from the position characteristic 1p.

  FIG. 10 is a diagram showing details of the position characteristic 1p. The horizontal axis indicates the door position, and the vertical axis indicates the first auxiliary force component. The data of the position characteristic 1p is stored in the target auxiliary force calculation unit 1e as a table or a function, for example. As shown in FIG. 10, the first auxiliary force component changes in a quadratic curve according to the door position. Specifically, as the door position changes from the fully open position or the fully closed position to the closing direction or the opening direction, the first auxiliary force component gradually increases. That is, the first auxiliary force component is larger when the door position is at an intermediate position between the vicinity of the fully open position and the vicinity of the fully closed position than when the door position is in the vicinity of the fully open position or in the vicinity of the fully closed position.

  In FIG. 9, when the door speed calculated by the speed calculation unit 1b is input to the target auxiliary force calculation unit 1e, a second auxiliary force component corresponding to the door speed is calculated by the speed characteristic 1v.

  FIG. 11 is a diagram showing details of the speed characteristic 1v. The horizontal axis indicates the door speed, and the vertical axis indicates the second auxiliary force component. The data of the speed characteristic 1v is stored in the target auxiliary force calculation unit 1e as a table or a function, for example. As shown in FIG. 11, the second auxiliary force component changes according to the door speed. Specifically, as the door speed increases, the second assisting force component gradually increases, and when the door speed subsequently reaches a predetermined value or more, the second assisting force component becomes constant.

  When the first auxiliary force component and the second auxiliary force component are calculated in the target auxiliary force calculation unit 1e of FIG. 9, the first auxiliary force component and the second auxiliary force component are multiplied by the multiplier 1m. Thus, the target assist force is calculated. That is, the target assist force changes according to the door position and the door speed. In particular, when the door position is in the vicinity of the fully open position or in the vicinity of the fully closed position, when the door position is at an intermediate position from the target auxiliary force calculated by the target auxiliary force calculation unit 1e, the target auxiliary force calculation unit 1e The calculated target assist force is greater. Further, even when the door position is the same, when the door speed is slow, the target auxiliary force calculated by the target auxiliary force calculation unit 1e when the door speed is higher than the target auxiliary force calculated by the target auxiliary force calculation unit 1e. Becomes larger.

  When the target auxiliary force for opening operation is calculated by the target auxiliary force calculation unit 1e as described above, the auxiliary force control unit 1f detects the target auxiliary force and the current detection unit 2a as shown in FIG. Based on the motor current thus generated, the motor 20 is driven in the opening direction so as to assist the manual opening operation of the back door 30 (step S43 in FIG. 7).

  Specifically, the auxiliary force control unit 1f controls the input voltage to the motor 20 by the motor driving unit 2 according to the target auxiliary force and the motor current, and drives the motor 20 in the opening direction. Thereby, the motor torque output from the motor 20 becomes an operation assisting force, and the operating force when the operator manually opens the back door 30 is reduced.

  Thereafter, when the operator stops the manual opening operation of the back door 30, the door speed calculated by the speed calculation unit 1b becomes 0 (step S44 in FIG. 7: YES). For this reason, the manual opening / closing detection unit 1h determines that the manual opening operation of the back door 30 has been stopped (step S45 in FIG. 7), and the control unit 1 stops driving the motor 20 (step S50 in FIG. 7). ) The power assist process is terminated. As a result, the back door 30 stops at an intermediate position between the fully closed position and the fully open position.

  Further, when the operator continues the manual opening operation of the back door 30, the door speed becomes a value other than 0 (for example, + value) (step S44 in FIG. 7: NO). In this case, the processes in steps S41 to S44 in FIG. 7 are repeated. Thereafter, when the back door 30 reaches the fully open position, the door speed becomes zero (step S44 in FIG. 7: YES). For this reason, the manual opening / closing detection unit 1h determines that the manual opening operation of the back door 30 has been stopped (step S45 in FIG. 7). And the control part 1 stops the drive of the motor 20 (step S50 of FIG. 7), and complete | finishes a power assist process.

  Further, immediately after the start of the power assist process, the control unit 1 determines that the operation direction of the back door 30 is the closing direction (step S41 in FIG. 7: closing direction). Then, as shown in FIG. 8, the target assist force calculation unit 1 e performs the target assist for the closing operation based on the door position detected by the position detection unit 1 a and the door speed calculated by the speed calculation unit 1 b. The force is calculated (step S46 in FIG. 7).

  Also at this time, as shown in FIG. 9, the target auxiliary force calculating unit 1e outputs the first auxiliary force component corresponding to the door position by the position characteristic 1p (FIG. 10), and the door by the speed characteristic 1v (FIG. 11). A second auxiliary force component corresponding to the speed is output. Then, the target auxiliary force is calculated by multiplying the first auxiliary force component and the second auxiliary force component by the multiplier 1m. The position characteristic 1p and the speed characteristic 1v may be different or may be the same when the back door 30 is opened and closed.

  As described above, when the target auxiliary force calculating unit 1e calculates the target auxiliary force for the closing operation, as shown in FIG. 9, the auxiliary force control unit 1f is based on the target auxiliary force and the motor current. The motor 20 is driven in the closing direction so as to assist the manual closing operation of the back door 30 (step S47 in FIG. 7).

  Specifically, the auxiliary force control unit 1 f controls the input voltage to the motor 20 by the motor driving unit 2 according to the target auxiliary force and the motor current, and drives the motor 20 in the closing direction. Thereby, the motor torque output from the motor 20 becomes the operation assisting force, and the operating force when the operator manually closes the back door 30 is reduced.

  Thereafter, when the operator stops the manual closing operation of the back door 30, the door speed calculated by the speed calculation unit 1b becomes 0 (step S48 in FIG. 7: YES). For this reason, the manual opening / closing detection unit 1h determines that the manual closing operation of the back door 30 has been stopped (step S49 in FIG. 7), and the control unit 1 stops driving the motor 20 (step S50 in FIG. 7). ) The power assist process is terminated. Thereby, the back door 30 stops at an intermediate position.

  When the operator continues the manual closing operation of the back door 30, the door speed becomes a value other than 0 (for example, -value) (step S48 in FIG. 7: NO). In this case, steps S41 and S46 to S48 in FIG. 7 are repeated. Thereafter, when the back door 30 reaches the fully closed position, the door speed becomes 0 (step S48 in FIG. 7: YES). For this reason, the manual opening / closing detection unit 1h determines that the manual closing operation of the back door 30 has been stopped (step S49 in FIG. 7). And the control part 1 stops the drive of the motor 20 (step S50 of FIG. 7), and complete | finishes a power assist process.

  According to the above embodiment, the manual opening / closing operation of the back door 30 is performed even if the load applied to the back door 30 varies depending on the opening / closing position of the back door 30 due to the characteristics of the BD opening / closing mechanism 21 and the action of external force such as frictional force and gravity. The target assisting force for assisting changes corresponding to the opening / closing position of the back door 30. Specifically, the target assist force is set larger at the intermediate position than at the fully open position or the fully closed position. For this reason, even when a heavy load is applied to the back door 30 at the intermediate position, when the operator manually opens and closes the back door 30, the motor 20 provides sufficient assisting force at the intermediate position. Does not feel the back door 30 heavy at the intermediate position. From the above, it is possible to assist the operator so that the back door 30 can be opened and closed with a good feel. Further, if the operator's operating force in the vicinity of the fully open position or in the fully closed position is made substantially the same as the operator's operating force in the intermediate position, the operating force is almost equal regardless of the opening / closing position of the back door 30. It becomes constant and the operation feeling becomes better.

  Further, in the above embodiment, when the operator manually opens and closes the back door 30, even when the open / close position of the back door 30 is the same, even when the open / close speed of the back door 30 is slow, the target assist The force is set large. For this reason, even if the operator increases the opening / closing speed of the back door 30, it becomes difficult to feel that the back door 30 has become heavy, and it is possible to assist the opening / closing operation of the back door 30 with a good feel.

  Furthermore, in the above-described embodiment, when the operator manually opens and closes the back door 30, the first auxiliary force component is calculated based on the door position detected by the position detection unit 1a and detected by the speed calculation unit 1b. A second auxiliary force component is calculated based on the door speed. Then, the target auxiliary force is calculated by multiplying the first auxiliary force component and the second auxiliary force component. Furthermore, since the drive of the motor 20 is controlled based on the target assist force and the motor current, the manual opening / closing operation of the back door 30 can be appropriately assisted.

  The present invention can employ various embodiments other than those described above. For example, in the above embodiment, an example was shown in which the target auxiliary force was calculated by multiplying the first auxiliary force component calculated based on the door position and the second auxiliary force component calculated based on the door speed. However, the present invention is not limited to this, and the target assist force may be calculated by other calculation methods.

  Moreover, in the above embodiment, although the position detection part 1a showed the example which detected the opening / closing position of the back door 30 based on the output of the pulse generator 7, fully closed detection SW8, and fully open detection SW9, this invention is shown. It is not limited to this. In addition to this, for example, the position detection unit may detect the open / close position of the back door based on an output from a sensor or a switch, a current flowing in the motor, or a ripple frequency included in the current flowing in the motor.

  In the above embodiment, the flip-up type back door 30 is shown as an example. However, the present invention is not limited to this, and back doors of other types may be used.

  Furthermore, although the example which applied this invention to the power back door control apparatus 10 of the four-wheeled vehicle was given in the above embodiment, it is not restricted to this. For example, the present invention can be applied to a door opening / closing control device such as a power slide door control device that opens and closes a sliding door. The present invention can also be applied to a door opening / closing control device that opens and closes a door by an actuator other than a motor.

DESCRIPTION OF SYMBOLS 1 Control part 1a Position detection part 1b Speed calculation part 1e Target auxiliary force calculation part 1f Auxiliary force control part 2a Current detection part 10 Power back door control apparatus (door opening / closing control apparatus)
20 Motor (actuator)
30 Back door

Claims (6)

A control unit that controls driving of an actuator that opens and closes the door;
A position detection unit for detecting an opening / closing position of the door;
A speed calculation unit that calculates an opening / closing speed of the door based on a time change of the opening / closing position detected by the position detection unit;
A target auxiliary force calculation unit that calculates a target auxiliary force based on the opening / closing position detected by the position detection unit and the opening / closing speed calculated by the speed calculation unit;
In the door opening / closing control apparatus that controls the driving of the actuator so as to assist the opening / closing operation of the door based on the target auxiliary force calculated by the target auxiliary force calculating unit,
When the opening / closing position of the door is in the vicinity of the fully open position, the opening / closing position of the door is at an intermediate position between the vicinity of the fully open position and the vicinity of the fully closed position based on the target auxiliary force calculated by the target auxiliary force calculation unit. In this case, the target opening / closing control device is characterized in that the target auxiliary force calculated by the target auxiliary force calculation unit is larger. A control unit that controls driving of an actuator that opens and closes the door;
A position detection unit for detecting an opening / closing position of the door;
A speed calculation unit that calculates an opening / closing speed of the door based on a time change of the opening / closing position detected by the position detection unit;
A target auxiliary force calculation unit that calculates a target auxiliary force based on the opening / closing position detected by the position detection unit and the opening / closing speed calculated by the speed calculation unit;
In the door opening / closing control apparatus that controls the driving of the actuator so as to assist the opening / closing operation of the door based on the target auxiliary force calculated by the target auxiliary force calculating unit,
When the opening / closing position of the door is in the vicinity of the fully closed position, the opening / closing position of the door is set to an intermediate position between the vicinity of the fully open position and the vicinity of the fully closed position based on the target auxiliary force calculated by the target auxiliary force calculation unit. In some cases, the target auxiliary force calculated by the target auxiliary force calculation unit is larger, and the door opening / closing control device is characterized in that In the door opening and closing control device according to claim 1 or 2,
Even if the door opening / closing position is the same, the target auxiliary force calculating unit calculates when the door opening / closing speed is faster than the target auxiliary force calculated by the target auxiliary force calculating unit when the door opening / closing speed is slow. The door opening / closing control device characterized in that the target assisting force is larger. In the door opening and closing control device according to any one of claims 1 to 3,
The target assist force calculation unit
Calculating a first auxiliary force component based on the opening / closing position detected by the position detector;
Calculating a second assisting force component based on the opening / closing speed detected by the speed calculation unit;
The door opening / closing control device, wherein the target auxiliary force is calculated by multiplying the first auxiliary force component and the second auxiliary force component. In the door opening and closing control device according to any one of claims 1 to 4,
A current detection unit for detecting a drive current of the actuator;
The control unit controls driving of the actuator based on the target auxiliary force calculated by the target auxiliary force calculation unit and the driving current detected by the current detection unit. Control device. In the door opening and closing control device according to any one of claims 1 to 5,
The door comprises a vehicle back door,
The door opening / closing control device comprises a power back door control device for applying an operation assisting force by the actuator when the back door is opened / closed.

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