JP2009162329A - Shift switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stop learning when any abnormality may occur, in learning correction amount of positional information detected based on output of a non-contact sensor (non-contact NSW). <P>SOLUTION: When learning control is started in a specific range position (e.g. P range position), in the case where a divergence amount δ1 between a detent rotation position θ<SB>n</SB>calculated by a current learning value and a detent rotation position θ<SB>n-1</SB>calculated by a previous learning value is large (δ1≥determination value A1), it is determined that any abnormality occurs and learning is stopped (ST4, ST8), so as to prevent learning failure of the detent rotation position. When a divergence amount δ2 between the detent rotation position θ<SB>n</SB>calculated by the current learning value and an initial detent rotation position θ<SB>0</SB>at factory shipment is large (δ2≥determination value A2), it is determined that any abnormality occurs and learning is stopped (ST5, ST8), so as to prevent learning failure outside a tolerance of time degradation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a by-wire shift switching device that switches a shift range of an automatic transmission using an actuator.

  In a vehicle equipped with an engine (internal combustion engine), the gear ratio between the engine and the drive wheel is automatically used as a transmission that properly transmits the torque and rotation speed generated by the engine to the drive wheel according to the running state of the vehicle. Automatic transmissions that are optimally set are known.

  As an automatic transmission mounted on a vehicle, for example, a planetary gear type transmission that sets a gear stage using a friction engagement element such as a clutch and a brake and a planetary gear device, or a gear ratio is adjusted steplessly. There is a belt type continuously variable transmission (CVT: Continuously Variable Transmission).

  In a vehicle equipped with a planetary gear type automatic transmission, a shift map having a shift line (gear stage switching line) for obtaining an optimum gear stage according to the vehicle speed and the accelerator opening degree (or throttle opening degree). Is stored in an ECU (Electronic Control Unit) or the like, a target gear stage is calculated by referring to a shift map based on the vehicle speed and the accelerator opening, and a clutch that is a friction engagement element is calculated based on the target gear stage. The gear stage (shift stage) is automatically set by engaging or releasing the brake and the one-way clutch in a predetermined state.

  Also, the belt type continuously variable transmission has a belt wound around a primary pulley (input pulley) and a secondary pulley (output pulley) having pulley grooves (V grooves), and the width of the pulley groove of one pulley. At the same time, by narrowing the width of the pulley groove of the other pulley, the belt wrapping radius (effective diameter) for each pulley is continuously changed to set the gear ratio steplessly. It is configured.

  As a control device for controlling such an automatic transmission, the position of the shift range of the automatic transmission is electrically detected by a non-contact sensor (a magnetic sensor such as a Hall IC), and shift switching is performed based on this detection signal. By switching the manual valve of the automatic transmission by driving an actuator such as an electric motor, the shift position of P (parking), R (reverse), N (neutral), D (drive), etc. is switched. There is a shift switching device (see, for example, Patent Document 1).

  In such a by-wire type shift switching device, the shift lever and the shift range are different from a general shift switching device, that is, a shift switching device in which the shift range of the automatic transmission is directly switched by a shift lever operation by the driver. Since it is not necessary to mechanically connect the switching mechanism, there is no restriction on the layout when these parts are mounted on the vehicle, and the degree of freedom in design can be increased. Further, there is an advantage that the assembling work to the vehicle can be easily performed.

  Such a shift range switching device includes a shift range switching mechanism for switching the shift range of the automatic transmission to, for example, each of a P range, an R range, an N range, and a D range.

  The shift range switching mechanism includes, for example, a manual shaft connected to a rotating shaft of a motor as an actuator by spline fitting, a detent plate for switching a manual valve of a hydraulic control circuit of an automatic transmission, and a roller at a tip portion. It has a detent spring and the like. The detent plate is fixed to the manual shaft, and the detent plate has a recess for holding the spool valve of the manual valve at a position corresponding to each of the P range, R range, N range, and D range. Is formed. Then, due to the rotation of the detent plate by the driving force of the motor, the roller of the detent spring (hereinafter, the roller of the detent spring may be simply referred to as “roller”) fits into the recess of the target range of the detent plate, The detent plate is held at the rotation angle of the target range, and the position of the spool valve of the manual valve is held at the position of the target range.

  Further, in such a shift range switching mechanism, a suction range is set in each recess corresponding to each range of the detent plate, and when the roller enters the suction range, the detent plate is moved by the elastic force of the detent spring. The roller rotates and the roller is disposed at the lowest position (range valley position) of the recess.

As a technique related to the by-wire type shift switching device, the following Patent Document 2 describes the current rotational position obtained from the output of the encoder when the energization to the actuator that is the drive source of the shift range switching mechanism is off. A technique is described in which, when the difference from the target rotational position exceeds a predetermined amount, the actuator is driven (energized) to perform position correction control.
JP 2006-336680 A JP 2004-308847 A

  By the way, in the shift switching device described above, the rotation position of the detent plate is detected by a non-contact sensor, and the range (P, R, N, D) position is determined based on the output voltage of the non-contact sensor. The non-contact sensor characteristic variation (manufacturing variation, temperature characteristic variation, etc.) and non-contact sensor-to-automatic transmission assembly variation are canceled at the time of shipment from the factory so that accurate range position determination can be performed. Specifically, the output voltage of the non-contact sensor is matched with the position information of the actual range position (detent plate rotation position (hereinafter also referred to as detent rotation position)) at a predetermined range position (for example, P range position). By implementing learning control, the above-described variation due to characteristics, assembly, or the like is canceled out.

  In addition, the non-contact sensor changes over time after shipment from the factory and the hardware change over time of the range switching mechanism (for example, the change in the suction range due to wear of the detent plate) are similarly canceled by learning control. The learning control in this case is executed, for example, every time the ignition is turned on (IG-ON) (anytime learning control).

  However, when such an occasional learning control is executed, the shift range switching mechanism may be affected by some abnormality (for example, an actuator stick (motor rotor stick) due to a foreign object biting or a roller sticking to a detent plate). If the position of the roller deviates from the range valley position (for example, the P range valley position) of the detent plate, the detent rotation position may be erroneously learned (the P range valley position that is the reference point is erroneously learned). When such erroneous learning occurs, subsequent actuator switching control may become impossible, and erroneous switching such as switching to a range different from the range operated by the driver (user) may occur. There is concern.

  In addition, the current detent rotation position has shifted from the initial detent rotation position at the time of shipment from the factory as the output characteristics of the non-contact sensor after factory shipment deteriorate with time and with the hardware deterioration of the shift range switching mechanism. When the deviation over time becomes larger than the maximum deviation assumed at the time of design, an abnormal value may be learned.

  Note that none of the above-described Patent Documents 1 and 2 refers to the above-described ad hoc learning control. Therefore, even if the techniques described in these Patent Documents 1 and 2 are used, the above-described problem ( (Incorrect learning of detent rotation position) cannot be eliminated.

  The present invention has been made in consideration of such circumstances, and has an actuator that switches a shift range, detects position information of a moving member that moves by the driving force of the actuator based on the output of a non-contact sensor, In the shift switching device that controls the actuator based on the detection result, when learning a correction amount for correcting the position information detected based on the output of the non-contact sensor, some abnormality may occur. The purpose is to realize learning control that can stop learning.

  The present invention is premised on a by-wire shift switching device that switches a shift range by an actuator. In such a shift switching device, the position information detecting means for detecting the position information of the moving member that is moved by the driving force of the actuator based on the output of the non-contact sensor, and the position information detecting means at a specific range position A learning control means for learning and updating a correction amount for correcting the detection result as a learning value, and a difference between the position information calculated from the current learning value and the position information indicating the specific range position when learning control is started It is characterized by comprising learning control stopping means for stopping learning when the amount does not satisfy the criterion.

  According to the present invention, when learning control is started at a specific range position, if there is an unexpected divergence between the position information calculated from the current learning value and the position information indicating the specific range position, Since it is determined that there is a possibility that an abnormality will occur and learning is stopped, it is possible to prevent erroneous learning of learning values.

  In the present invention, the position information is, for example, a rotational position of a detent member that is rotated by a driving force of an actuator (hereinafter also referred to as a detent rotational position).

  In the present invention, the range position for determining whether or not to perform learning control is a parking range (P range) position, a reverse range (R range) position, a neutral range (N range) position, or a drive range (D range) position. Any one of the range positions or a plurality of range positions (including all range positions).

  In the present invention, the learning control start condition is when the power supply state of the vehicle on which the shift switching device is mounted changes from ignition off to ignition on.

  In addition, as a non-contact sensor used for this invention, magnetic sensors, such as a Hall element or Hall IC, can be mentioned.

  Next, the present invention will be specifically described.

  As a specific configuration of the present invention, when learning control is started at a specific range position, a deviation amount between the position information calculated from the current learning value and the position information calculated from the previous learning value is greater than or equal to the first determination value. In some cases, the learning can be stopped. In the case of this configuration, the first determination value is larger than the maximum value of the play of the fitting portion between the actuator and the moving member (specifically, the detent plate) (for example, about 3 times the play). Value).

  According to this configuration, the following operational effects can be achieved.

  First, for example, when learning control is started immediately after the ignition is turned on (IG-ON), the assumed roller position is the P range valley position. Here, if the shift range switching mechanism is normal, the roller is in the P range valley position during the previous learning control, and the roller is also in the P range valley position during the current learning control, the previous learning value There is no difference between the calculated position information (previous position information) and the position information calculated based on the current learning value, or there is a small divergence corresponding to the backlash of the fitting portion between the actuator and the moving member. It only occurs.

  On the other hand, when learning control is started immediately after the ignition is turned on (IG-ON), the roller of the shift range switching mechanism is greatly displaced from the P range valley position due to, for example, an abnormality such as an actuator stick caused by a foreign object. In some cases, the amount of divergence between the position information calculated from the previous learning value and the position information calculated from the current learning value is larger than that in a normal case. Therefore, when the amount of deviation between the position information calculated from the current learning value and the previous position information is large (greater than or equal to the first determination value), there is a possibility that some abnormality has occurred. Stop and do not learn incorrectly.

  As described above, the learning control is executed only when the amount of deviation between the position information calculated from the current learning value and the previous position information is smaller than the first determination value (less than the first determination value), so that appropriate learning is performed. The value can be learned. Thereby, actuator switching control can be appropriately performed.

  Also, for example, when learning at the P range position, if the roller is greatly out of the P range valley position and is located in the suction range of the adjacent range (R range), the learning control is performed at the P range position. In spite of this, an erroneous learning occurs in which the position in the suction range of the R range is learned as a reference point, but learning is permitted only when the deviation amount is smaller than the first determination value as described above. By doing so, such erroneous learning can be prevented. As a result, there is no risk of erroneous switching, for example, switching to a range different from the range that the driver (user) has switched.

  As another specific configuration of the present invention, when learning control is started at a specific range position, a deviation amount between the position information calculated from the current learning value and the initial position information of the specific range position is greater than or equal to the second determination value. In some cases, the learning can be stopped. In the case of this configuration, the second determination value is a deviation of the current position information from the initial position information (specifically, the detent rotation position at the time of shipment from the factory) that is assumed due to deterioration with time of the shift switching device. Set in consideration of the maximum amount.

  According to this configuration, the following operational effects can be achieved.

  First, the output characteristics of the non-contact sensor and the hardware of the shift range switching mechanism deteriorate over time, but such deterioration over time can be assumed by design and experiment, and the above-mentioned maximum deviation amount can be assumed. If the divergence amount (the divergence amount between the position information calculated based on the current learning value and the initial position information) is large, there is a possibility that an abnormality has occurred due to deterioration over time. Don't do wrong learning.

  As described above, the learning is allowed only when the amount of deviation between the position information calculated from the current learning value and the initial position information is small (less than the second determination value), thereby allowing the time-dependent deterioration of the non-contact sensor or the like. Incorrect learning outside the range can be prevented.

  As another specific configuration of the present invention, when learning control is started at a specific range position, a deviation amount between the position information calculated from the current learning value and the position information calculated from the previous learning value is a third determination value. In the following cases, a configuration in which learning is stopped can be given. In the case of this configuration, the third determination value is the maximum value of the backlash of the fitting portion between the actuator and the moving member (specifically, the detent plate).

  According to this configuration, when learning control is started, when the amount of deviation between the position information calculated from the current learning value and the position information calculated from the previous learning value is small (specifically, the design of the fitting portion) If it is within the upper play range), for example, it is determined that the detent rotation position has not changed from the previous position, and learning is stopped. Therefore, the learning value is frequently updated due to minute position changes within the design play. Can be suppressed. As a result, the occurrence of an abnormality such as a learning value update error can be suppressed. Such “learning value update error” is also included in the false learning of the learning value.

  In this configuration, when the looseness control of the fitting portion between the actuator and the moving member is performed, it is not determined whether the deviation amount is equal to or less than the third determination value. The backlash control means that at a specific range position (for example, P range position), a rotational force that does not move from the range position is applied to the output shaft of the actuator, whereby the actuator and the moving member (specifically, the detent plate). ) Is a control to close the backlash of the fitting portion in a specific direction.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a by-wire shift switching device mounted on a vehicle.

  The shift switching device 1 of this example is a device that switches the shift range of an automatic transmission 3 mounted on a vehicle, and includes a P switch 11, a display unit 12, a meter 13, a shift range switching mechanism 100, and this shift range switching mechanism. A motor 101 that drives 100, an encoder 103 that detects a rotation angle of the rotor of the motor 101, a non-contact NSW (non-contact neutral start switch) 104, an SBW_ECU (Shift by Wire_ECU) 200, and the like. The shift switching device 1 functions as a shift-by-wire device that switches the shift range of the automatic transmission 3 by electrical control.

  The P switch 11 is a switch for switching the shift range from a range other than parking (non-P range) to a parking range (P range), and an indicator 11a for indicating the state of the switch to the driver, and the driver An input unit 11b that receives an instruction from the vehicle is provided, and an instruction to put the shift range into the P range can be input by an operation (ON operation) of the input unit 11b by the driver. An instruction (instruction to enter the P range) by the operation of the input unit 11b is input to the SBW_ECU 200. An example of the input unit 11b is a momentary switch.

  The display unit 12 displays instructions and warnings for the driver. The meter 13 displays the state of the vehicle equipment, the state of the shift range, and the like. Each display on the display unit 12 and the meter 13 is controlled by the SBW_ECU 200.

The non-contact NSW 104 is a rotation angle sensor (for example, a magnetic sensor such as a Hall IC) in which the output voltage V _NSW changes linearly in accordance with the rotation angle of the output shaft of the motor 101 (the rotation shaft 102a of the speed reduction mechanism 102) described later. Based on the output voltage V _NSW , the rotational position of the manual shaft 105 described later, that is, the rotational position of the detent plate 106 (hereinafter also referred to as detent rotational position) can be detected. The output voltage V _NSW of the non-contact _NSW 104 is input to the SBW_ECU 200.

  The SBW_ECU 200 is an electronic control unit mainly composed of a microcomputer, and includes a CPU, a ROM, a RAM, a backup RAM, and the like. The ROM stores various control programs including drive control of the motor 101 that is an actuator of the shift switching device 1, maps that are referred to when executing these various control programs, and the like. The CPU executes arithmetic processing based on various control programs and maps stored in the ROM. The RAM is a memory that temporarily stores calculation results in the CPU, data input from sensors, and the like, and the backup RAM is a nonvolatile memory.

  Then, the SBW_ECU 200 manages the operation of the shift switching device 1 in an integrated manner. For example, the SBW_ECU 200 controls the drive of the motor 101 of the range switching mechanism 100 (FIG. 5) in order to switch the shift range between the P range and the non-P range, and displays the current shift range state on the indicator 11a. To do. Specifically, for example, when the driver operates the input unit 11b (switch ON) when the shift range is a non-P range, the SBW_ECU 200 switches the shift range to the P range and also displays the current shift range on the indicator 11a. Is in the P range.

  Further, the SBW_ECU 200 performs control (drive control of the motor 101) for switching the shift range of the automatic transmission 3 in accordance with the shift range instructed by the operation of the shift lever 51 (see FIG. 4) by the driver (user). At the same time, the current shift range state is displayed on the meter 13. Further, the SBW_ECU 200 displays instructions and warnings for the driver on the display unit 12.

  The SBW_ECU 200 is connected to an ECT_ECU (Electronic Controlled Automatic Transmission_ECU) 300 in a state where data communication is possible. The ECT_ECU 300 is an electronic control unit mainly for controlling the automatic transmission 3. The ECT_ECU 300 also includes a CPU, a ROM, a RAM, a backup RAM, and the like.

  SBW_ECU 200 is connected to power supply ECU 400 in a state where data communication is possible. An ignition switch 401 is connected to the power supply ECU 400. When the ignition switch 401 is turned on, power is supplied from a battery (not shown) mounted on the vehicle and the shift switching device 1 is activated. Also, when the ignition switch 401 is turned on, an ignition on (IG-ON) signal is transmitted from the power supply ECU 400 to the SBW_ECU 200, and when the ignition switch 401 is turned off, the power supply ECU 400 sends an ignition off (IG-OFF) signal to the SBW_ECU 200. Is sent. The power supply ECU 400 also includes a CPU, a ROM, a RAM, a backup RAM, and the like.

  Next, the automatic transmission 3 and the shift range switching mechanism 100 will be described.

-Automatic transmission-
A schematic configuration of the automatic transmission 3 (including the torque converter 2) will be described with reference to FIG. The automatic transmission 3 is substantially symmetrical with respect to the center line, and the lower half of the center line is omitted in FIG.

  First, the torque converter 2 includes a pump impeller 21 on the input shaft side, a turbine runner 22 on the output shaft side, a stator 23 that develops a torque amplification function, and a one-way clutch 24. The pump impeller 21 and the turbine runner 22 Power is transmitted between the two through the fluid.

  The torque converter 2 is provided with a lockup clutch 25 that directly connects the input side and the output side. When the lockup clutch 25 is completely engaged, the pump impeller 21 and the turbine runner 22 are integrated. Rotate. Further, by engaging the lockup clutch 25 in a predetermined slip state, the turbine runner 22 rotates following the pump impeller 21 with a predetermined slip amount during driving. The torque converter 2 and the automatic transmission 3 are connected by a rotating shaft.

  The automatic transmission 3 shifts the rotational power input from the torque converter 2 to the input shaft 30 and outputs it to the output shaft 34. The automatic transmission 3 can shift eight forward speeds and one reverse speed.

  The automatic transmission 3 includes a front planetary 31, a rear planetary 32, an intermediate drum 33, a first clutch (input clutch) C1, a second clutch C2, a third clutch C3, a fourth clutch C4, a first brake B1, and a second brake. B2 and a one-way clutch F1 are provided.

  The front planetary 31 is a double pinion type gear planetary mechanism, and includes a first sun gear S1, a first ring gear R1, a plurality of inner pinion gears P1, a plurality of outer pinion gears P2, and a first carrier CA1. It has.

  The first sun gear S1 is fixed to the housing case 3a of the automatic transmission 3 and cannot be rotated, and the first ring gear R1 can be rotated integrally with the intermediate drum 33 via the third clutch C3 or can be relatively rotated. The first sun gear S1 is concentrically inserted on the inner diameter side of the first ring gear R1.

  The plurality of inner pinion gears P1 and the plurality of outer pinion gears P2 are interposed at a plurality of circumferential locations in the opposed annular space between the first sun gear S1 and the first ring gear R1, and the plurality of inner pinion gears P1 is the first inner gear P1. The plurality of outer pinion gears P2 mesh with the sun gear S1, and the plurality of outer pinion gears P2 mesh with the inner pinion gear P1 and the first ring gear R1.

  The first carrier CA1 rotatably supports both pinion gears P1, P2, and the central shaft portion of the first carrier CA1 is integrally connected to the input shaft 30, and both the pinion gears P1, P1 are connected to the first carrier CA1. Each support shaft portion that supports P2 is supported by the intermediate drum 33 via the fourth clutch C4 so as to be integrally rotatable or relatively rotatable. The intermediate drum 33 is rotatably arranged on the outer diameter side of the first ring gear R1, and is in a non-rotatable state or a relatively rotatable state with respect to the housing case 3a of the automatic transmission 3 via the first brake B1. It is supported.

  The rear planetary 32 is a Ravigneaux type geared planetary mechanism, and includes a large-diameter second sun gear S2, a small-diameter third sun gear S3, a second ring gear R2, a plurality of short pinion gears P3, and a plurality of long pins. The pinion gear P4 and the second carrier CA2 are included. The second sun gear S2 is connected to the intermediate drum 33, and the third sun gear S3 is connected to the first ring gear R1 of the front planetary 31 via the first clutch C1 so as to be integrally rotatable or relatively rotatable, and the second ring gear R2 Is integrally connected to the output shaft 34.

  The plurality of short pinion gears P3 mesh with the third sun gear S3, and the plurality of long pinion gears P4 mesh with the second sun gear S2 and the second ring gear R2, and the third sun gear S3 via the short pinion gear P3. Are engaged. The second carrier CA2 rotatably supports both pinion gears P3 and P4, and the central shaft portion of the second carrier CA2 is connected to the input shaft 30 via the second clutch C2, and the second carrier CA2 Support shaft portions that support both pinion gears P3 and P4 are supported by the housing case 3a of the automatic transmission 3 via the second brake B2 and the one-way clutch F1.

  The first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the first brake B1, and the second brake B2 are wet multi-plate friction engagement devices that use the viscosity of oil. ing.

  The 1st clutch C1 makes the 3rd sun gear S3 of the rear planetary 32 the engagement state which can be rotated integrally with respect to the 1st ring gear R1 of the front planetary 31, or the releasing state which can be rotated relatively. The second clutch C <b> 2 sets the second carrier CA <b> 2 of the rear planetary 32 to an engaged state that can rotate integrally with the input shaft 30 or a released state that allows relative rotation.

  The third clutch C3 is configured to bring the first ring gear R1 of the front planetary 31 into an engaged state in which the first ring gear R1 can rotate integrally with the intermediate drum 33 or a released state in which relative rotation is possible. The fourth clutch C <b> 4 sets the first carrier CA <b> 1 of the front planetary 31 to an engaged state where the first carrier CA <b> 1 can rotate integrally with the intermediate drum 33 or a released state which allows relative rotation.

  The first brake B1 is configured to integrate the intermediate drum 33 with respect to the housing case 3a of the automatic transmission 3 so as to be in a non-rotatable engaged state or a relatively rotatable disengaged state. The second brake B <b> 2 integrates the second carrier CA <b> 2 of the rear planetary 32 with the housing case 3 a of the automatic transmission 3 so as to be in a non-rotatable engaged state or a relatively rotatable disengaged state.

  Further, the one-way clutch F1 allows rotation of the rear planetary 32 in only one direction of the second carrier CA2.

  FIG. 3 shows the engagement / release state of the clutches C1 to C4, the brakes B1 to B4, and the one-way clutches F0 to F3 of the automatic transmission 3 described above. In the operation table of FIG. 3, “○” indicates “engaged”, “×” indicates “disengaged”, “◎” indicates “engaged during engine braking”, and “△” indicates “only during driving”. “O” represents “engaged”.

  As shown in FIG. 3, in the automatic transmission 3 of this example, when the first clutch C1 is engaged, the first forward speed (1st) is established, and at this first speed, the one-way clutch F1 is engaged. When the first clutch C1 and the first brake B1 are engaged, the second forward speed (2nd) is established. When the first clutch C1 and the third clutch C3 are engaged, the third forward speed (3rd) is established. When the first clutch C1 and the fourth clutch C4 are engaged, the fourth forward speed (4th) is established.

  Further, when the first clutch C1 and the second clutch C2 are engaged, the fifth forward speed (5th) is established. When the second clutch C2 and the fourth clutch C4 are engaged, a forward gear 6 (6th) is established. When the second clutch C2 and the third clutch C3 are engaged, a forward gear 7 (7th) is established. When the second clutch C2 and the first brake B1 are engaged, the forward gear 8 (8th) is established. On the other hand, when the fourth clutch C4 and the second brake B2 are engaged, the reverse speed (R) is established.

  As described above, in the automatic transmission 3 of this example, the first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the first brake B1, the second brake B2, which are friction engagement elements, Further, the gear (gear) is set by engaging or releasing the one-way clutch F1 or the like in a predetermined state. Engagement / release of the first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the first brake B1, and the second brake B2 is controlled by the hydraulic control circuit 301 and the ECT_ECU 300.

  The hydraulic control circuit 301 controls the speed change operation of the automatic transmission 3, and includes a linear solenoid valve, an ON-OFF solenoid valve, an accumulator, and the like. The linear solenoid valve and the ON-OFF solenoid valve By switching the hydraulic circuit by controlling excitation / de-excitation, the first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the first brake B1, and the second brake of the automatic transmission 3 are switched. The engagement / release of B2 is controlled. Excitation / non-excitation of the linear solenoid valve and the ON-OFF solenoid valve of the hydraulic control circuit 301 is controlled by a solenoid control signal (instructed hydraulic signal) from the ECT_ECU 300.

  On the other hand, a shift device 5 as shown in FIG. 4 is arranged in the vicinity of the driver's seat of the vehicle. The shift device 51 is provided with a shift lever 51 that can be displaced. Further, the shift device 5 is set with an R position (reverse range), an N position (neutral range), a D position (drive range), and an S position (sequential range). The shift lever 51 can be displaced. Each shift position (range) of these R position, N position, D position, and S position (including the following “+” position and “−” position) is detected by a shift position sensor (not shown). The shift position information detected by the shift position sensor is input to the SBW_ECU 200.

  Then, regarding the situation where the shift position of the shift lever 51 is selected and the operation state of the automatic transmission 2 at that time, the respective shift positions (“N position”, “R position”, “D position”, “S position”). ).

  The “N position” is a position selected when the connection between the input shaft 30 and the output shaft 34 of the automatic transmission 2 is disconnected. When the shift lever 51 is operated to this “N position”, the automatic transmission is performed. All of the first clutch C1, the second clutch C2, the third clutch C3, the fourth clutch C4, the first brake B1, and the second brake B2 of the machine 2 are released (see FIG. 3).

  The “R position” is a position selected when the vehicle is moved backward, and when the shift lever 51 is operated to the R position, the automatic transmission 2 is switched to the reverse gear.

  The “D position” is a position selected when the vehicle moves forward. When the shift lever 51 is operated to the D position, a plurality of forward shifts of the automatic transmission 2 are performed according to the driving state of the vehicle. The speed of the stage (eight speed forward) is automatically controlled.

  The “S position” is a position that is selected when traveling in the sequential mode (manual mode), that is, when the driver manually performs a shift operation of a plurality of forward shift speeds (forward 8 speeds), A “−” position and a “+” position are provided before and after the S position. The “+” position is a position where the shift lever 51 is operated during the upshift in the sequential mode, and the “−” position is a position where the shift lever 51 is operated during the downshift in the sequential mode.

  When the shift lever 51 is in the S position and the shift lever 51 is operated to the “+” position or the “−” position with the S position as the neutral position, the forward shift speed of the automatic transmission 2 is increased or decreased. Is done. Specifically, the gear position is increased by one step for each operation to the “+” position (for example, 1st → 2nd →... → 8th). On the other hand, each time the operation to the “−” position is performed, the gear position is decreased by one step (for example, 8th → 7th →... → 1st).

-Shift range switching mechanism-
Next, the shift range switching mechanism 100 will be described with reference to FIGS.

  The shift range switching mechanism 100 in this example is a mechanism that switches the shift range of the automatic transmission 3 to a P range, an R range, an N range, and a D range. A motor 101 serving as a drive source for the shift range switching mechanism 100 is a synchronous motor such as a switched reluctance motor (SR motor), for example, and is provided with a speed reduction mechanism 102. Further, the motor 101 is provided with an encoder 103 that detects the rotation angle of the rotor. The encoder 103 is constituted by, for example, a magnetic rotary encoder, and outputs a pulse signal to the SBW_ECU 200 in synchronization with the rotation of the rotor of the motor 101.

  A manual shaft 105 is connected to the rotating shaft 102 a of the speed reduction mechanism 102. The rotating shaft 102a of the speed reduction mechanism 102 and the manual shaft 105 are connected by spline fitting. A non-contact NSW 104 (see FIG. 1) that detects the rotational position of the rotating shaft 102a of the speed reduction mechanism 102 is disposed on the motor 101 side.

  A detent plate 106 for switching the manual valve 302 of the hydraulic control circuit 301 of the automatic transmission 3 is fixed to the manual shaft 105. A spool valve 303 of a manual valve 302 is connected to the detent plate 106, and the operation amount of the manual valve 302 (position of the spool valve 303 is changed by rotating the detent plate 106 integrally with the manual shaft 105 by the motor 101. ) To switch the range of the automatic transmission 3 to any one of the P range, the R range, the N range, and the D range.

  The detent plate 106 is formed with four recesses 106a for holding the spool valve 303 of the manual valve 302 at positions corresponding to the P range, R range, N range, and D range.

  A detent spring (plate spring) 107 is disposed above the detent plate 106. The detent spring 107 is fixed to the manual valve 302 by cantilever support. A roller 108 is attached to the tip of the detent spring 107. The roller 108 is pressed against the detent plate 106 by the elastic force of the detent spring 107. Then, when the roller 108 is fitted into the concave portion 106a of the target range of the detent plate 106, the detent plate 106 is held at the rotation angle of the target range, and the position of the spool valve 303 of the manual valve 302 is held at the target range position. It has come to be.

  On the other hand, a parking rod 109 is fixed to the detent plate 106. A conical taper-shaped cam 110 is provided at the tip of the parking rod 109, and a lock lever 111 is in contact with the outer peripheral surface (cam surface) of the cam 110. The lock lever 111 moves up and down around the rotating shaft 112 according to the position of the cam 110, and the lock claw 111a of the lock lever 111 is engaged with the parking gear 113 by the up and down movement, or the lock claw 111 is locked from the parking gear 113. The configuration is such that the rotation of the parking gear 113 is locked / unlocked when the 111a is disengaged. The parking gear 113 is provided on the output shaft 34 of the automatic transmission 3. When the parking gear 113 is locked by the lock lever 111, the driving wheel of the vehicle is prevented from rotating (parking state). Retained.

  In the shift range switching mechanism 100 described above, in the P range, the parking rod 109 moves in the direction approaching the lock lever 111, the large diameter portion of the cam 110 pushes up the lock lever 111, and the lock claw 111a of the lock lever 111 The parking gear 113 is locked by being engaged with the parking gear 113, whereby the output shaft (drive wheel) 34 of the automatic transmission 3 is held in a locked state (parking state).

  On the other hand, in the shift range other than the P range, the parking rod 109 moves in a direction away from the lock lever 111, and the contact portion of the lock lever 111 with the cam 110 moves from the large diameter portion to the small diameter portion. As a result, the lock lever 111 is lowered. As a result, the lock claw 111a of the lock lever 111 is disengaged from the parking gear 113, the parking gear 113 is unlocked, and the output shaft 34 of the automatic transmission 3 is held in a rotatable state (running state).

  When the driver operates the shift lever 51 (see FIG. 4) in the vehicle on which the shift switching device 1 described above is mounted, the SBW_ECU 200 causes the target rotation angle (encoder count) corresponding to the shift range selected by the shift lever 51. (Target value of the value) is set, energization of the motor 101 is started, and the motor 101 is feedback-controlled so that it stops at a position where the detected rotation angle (encoder count value) of the motor 101 matches the target rotation angle (F / B control). Note that, by such feedback control, for example, as shown in FIG. 8, energization of the motor 101 is stopped after the roller 108 enters the range determination range (corresponding to the suction range) corresponding to each range. When the position of the roller 108 is shifted from the bottom position (range valley position), the detent plate 106 is rotated by the elastic force of the detent spring 107, and the roller 108 is disposed at the bottom position of the recess 106a.

  The SBW_ECU 200 reads the output signal of the non-contact NSW 104, and based on the output signal, the current rotational position of the detent plate 106 (the operation amount of the manual valve 302), that is, the current range is the P range, R range, It is determined whether the range is N range or D range, and the determination result is compared with the shift range (target range) selected by the shift operation to determine whether the shift range has been switched normally. To do.

-Learning control-
Next, learning control executed by the SBW_ECU 200 will be described.

  As described above, the non-contact NSW 104 characteristic variation (manufacturing variation, temperature characteristic variation, etc.), non-contact NSW 104 and variation due to the assembly of the automatic transmission 2 have been canceled at the time of factory shipment. Implement learning control. This ad hoc learning control will be described with reference to FIG.

First, the current non-contact NSW 104 due to the secular change of the non-contact NSW 104 after shipment from the factory and the hardware time-dependent change of the shift range switching mechanism 100 (for example, the change of the range position (suction range) due to wear of the detent plate 106). Output voltage V _NSW is shifted to a larger side than the initial value V ₀ (P range valley position value) adjusted at the time of shipment from the factory, the detent rotation converted from the output voltage V _x of the non-contact NSW 104 The position θ _x is shifted to the side larger than the actual detent rotation position θ ₀ . If such a deviation occurs, accurate range determination may not be performed. Learning control is performed to eliminate these points.

Specifically, for example, when the output voltage V _NSW of the non-contact _NSW 104 is corrected at the P range position, the current output voltage V _x of the non-contact NSW 104 is adjusted to the initial value V ₀ as shown in FIG. The correction amount (α = V _x −V ₀ ) is learned and the learning voltage α is used to correct the output voltage V _NSW of the non-contact _NSW 104 (V _NSW + α), thereby canceling the influence due to the change with time. Yes. When the correction amount is negative (V _x <V ₀ ), the output voltage V _NSW is corrected to [V _NSW + (− α)]. Further, the learning value α is stored in the RAM of the SBW_ECU 200, for example.

Further, such learning control is executed every time ignition off → ignition on [IG-OFF → IG-ON], and the learning value α of the correction amount is sequentially updated and recorded. More specifically, first, when the learning value updated / recorded in the previous learning control is α _n−1 , the corrected voltage V _n−1 of the output voltage V _NSW of the non-contact _NSW 104 is V _{n −1} = (V _NSW + α _n−1 ). Next, if the voltage V _{n obtained} by correcting the output voltage V _NSW of the non-contact _NSW 104 at the time of the current learning control with the current learning value (learning value α _{n−1 of the} previous trip) is the same as the voltage V _n−1. The learning value α _n-1 is maintained as it is. On the other hand, when the current voltage V _n is different from the voltage V _n−1 , the correction amount (α _n = V _n −V _n−1 ) is learned, and the learned correction amount is set as the current learning value α _n. Record. In this way, the current learning value α _n is sequentially updated and recorded.

  By the way, when learning control is started immediately after the ignition is turned on (IG-ON), the assumed position of the roller 108 is the P range valley position. Here, the shift range switching mechanism 100 is normal, the roller 108 is in the P range valley position of the detent plate 106 during the previous learning control, and the roller 108 is also in the P range valley position during the current learning control. In this case, there is no problem even if the learning control is executed.

  On the other hand, when the learning control is started immediately after the ignition is turned on (IG-ON), the rotation of the detent plate 106 is stopped halfway due to, for example, an abnormality such as the rotor stick of the motor 101 caused by a foreign object. As shown in FIG. 8, when the learning control is executed when the position of the roller 108 of the shift range switching mechanism 100 is deviated from the P range valley position of the detent plate 106, the detent rotation position reference point is erroneously learned. Resulting in.

Further, as shown in FIG. 9, the detent rotation position θ calculated with the current learning value α _n with the deterioration of the output characteristics of the non-contact NSW 104 with time or with the mechanical deterioration of the shift range switching mechanism 100 or the like. _{If n} deviates from the initial detent rotation position θ ₀ at the time of shipment from the factory, and the deviation over time becomes larger than the maximum deviation assumed at the time of design, an abnormal value may be learned.

  Considering the above points, this example is characterized in that when learning control is started, if there is a possibility that some abnormality may occur, the learning is stopped.

  An example of the specific control will be described with reference to the flowchart of FIG. The control routine of FIG. 10 is executed in the SBW_ECU 200.

  In this example, [IG-OFF → IG-ON] is the learning start condition, and therefore, immediately after IG-ON is in the P range, the assumed detent rotation position θ is the valley position of the P range. Learning control is executed at the P range position.

  In the control routine of FIG. 10, the first determination value A1 used for the determinations in steps ST4 and ST12 is a spline fitting between the output shaft of the motor 101 as the actuator (the rotation shaft 102a of the speed reduction mechanism 102) and the manual shaft 105. A value larger than the maximum value of the backlash (for example, a value about three times the backlash) is set.

Further, the second determination value A2 used for the determinations in steps ST5 and ST13 is the initial detent rotation position θ ₀ (assumed by the temporal change of the output characteristics of the non-contact NSW 104 and the mechanical deterioration of the shift range switching mechanism 100 over time. A value smaller by a predetermined amount than the maximum deviation amount from (see FIG. 9) is set.

  Further, the third determination value A3 used for the determination in step ST6 is the maximum value of the play of the spline fitting portion between the output shaft of the motor 101 as the actuator (the rotation shaft 102a of the speed reduction mechanism 102) and the manual shaft 105. Is set.

  Next, the control routine of FIG. 10 will be described step by step.

  First, in step ST1, it is determined whether or not ignition off → ignition on (IG-OFF → IG-ON). If the determination result is negative, the process returns. If the determination result of step ST1 is affirmative, the process proceeds to step ST2.

  In step ST2, it is determined whether or not the backlash control is being executed. The backlash control means that, at a specific range position (P range position in this example), a rotational force that does not move from the range position is applied to the output shaft of the motor 101, so that the motor 101 and the manual shaft 105 It is the control which closes the backlash of a spline fitting part in a specific direction. Note that the backlash control is executed by the SBW_ECU 200.

  If the determination result of step ST2 is negative, the process proceeds to step ST3. When the determination result of step ST2 is affirmative (when the backlash control is being executed), the process proceeds to step ST11.

In step ST3, divergence amounts δ1 and δ2 are calculated. Specifically, the output voltage V _NSW of the non-contact _NSW 104 is corrected using the current learning value (the learning value stored in the previous trip learning control), and the detent rotation position θ _n is calculated from the corrected voltage value. . Note that the detent rotation position θ _n is calculated based on, for example, the relationship [output voltage V _NSW −detent rotation position θ _NSW ] shown in FIG.

Then, the detent rotation position θ _n calculated in this way and the previous detent rotation position θ _n-1 calculated from the previous learning value (the learning value stored in the learning control of the previous trip) by the same process as described above. The difference [θ _n −θ _n−1 ] is defined as a deviation amount δ1.

Also, the difference [θ _n −θ ₀ ] between the detent rotation position θ _n calculated from the current learning value and the initial detent rotation position θ ₀ at the time of factory shipment (see FIG. 9) is assumed to be δ2.

  Next, in step ST4, it is determined whether or not the deviation amount δ1 calculated in step ST3 is greater than or equal to the first determination value A1. When the determination result of step ST4 is negative (δ1 <A1), the process proceeds to step ST5.

  In step ST5, it is determined whether or not the deviation amount δ2 calculated in step ST3 is greater than or equal to the second determination value A2. If the determination result of step ST5 is negative (δ2 <A2), the process proceeds to step ST6.

  In step ST6, it is determined whether or not the deviation δ1 calculated in step ST3 is equal to or smaller than a third determination value A3. When the determination result in step ST6 is negative (δ1> A3), the learning control described above is performed (step ST7).

  As described above, when the deviation amount δ1 is [δ1 <A1] and [δ1> A3] and the deviation amount δ2 is [δ2 <A2], the learning control is performed and the learning value is updated and stored. By carrying out such learning control, the secular change of the non-contact NSW 104 after shipment from the factory and the hardware secular change of the shift range switching mechanism 100 (for example, the change of the suction range due to wear of the detent plate 106). It is possible to cancel, and accurate range position determination can be performed. Further, such learning control is performed every time the learning start condition [IG-OFF → IG-ON] is satisfied unless the determination result of any one of step ST4, step ST5, or step ST6 is affirmative. The learning value is sequentially updated and stored.

Here, when the learning start condition [IG-OFF → IG-ON] is satisfied (the determination result of step ST1 is affirmative), when the learning control is started, as shown in FIG. The position of the roller 108 is deviated from the P range valley position of the detent plate 106, and the deviation amount δ1 (difference between the detent rotation position θ _n calculated in the current trip and the previous detent rotation position θ _n-1 ), If it is equal to or greater than the first determination value A1 described above (the determination result of step ST4 is affirmative), it is determined that some abnormality has occurred, and learning control is stopped (step ST8). By canceling the learning control in this way, it is possible to prevent learning an incorrect detent rotation position.

In the control of this example, the detent rotation position θ _n calculated from the current learning value α _n is associated with the deterioration with time of the output characteristics of the non-contact NSW 104 or the mechanical deterioration with time of the shift range switching mechanism 100 or the like. Although it deviates from the initial detent rotation position θ ₀ at the time of factory shipment (see FIG. 9), the learning value is allowed to be updated when the deviation amount δ2 is smaller than the second determination value A2. On the other hand, when the deviation amount δ2 is greater than or equal to the second determination value A2 (the determination result of step ST5 is affirmative determination (δ2 ≧ A2)), it is determined that some abnormality may have occurred and learning control is stopped. (Step ST8). By canceling the learning control in this way, it is possible to prevent erroneous learning outside the allowable range of deterioration over time such as the non-contact NSW 104.

  Further, in the control of this example, when the deviation amount δ1 is larger than the third determination value, that is, the maximum value of the play of the spline fitting portion between the output shaft of the motor 101 and the manual shaft 105 (the determination result of step ST6). If the deviation amount δ1 is within the third determination value (the determination result of step ST6 is affirmative determination), the detent rotation position has changed from the previous learning time. It judges that there is no, and stops learning control. By canceling the learning control in this way, frequent updating of the learning value due to a minute rotational position change within the play range of the spline fitting portion can be suppressed, and occurrence of an abnormality such as a learning value update error can be prevented. Can be suppressed.

  However, such a determination process in step ST6 is not executed during the backlash control. That is, when the determination result of step ST2 is affirmative, the processes of step ST11 to step ST13 are sequentially executed. The calculation process in step ST11 is the same as that in step ST3 described above. Moreover, the determination process of step ST12 and step ST13 is the same as that of above-mentioned step ST4 and step ST5, respectively.

Here, in the above control regarding changes over time in the control of, as shown in FIG. 9, the deviation amount of the initial detent rotational position theta ₀ detent rotational position theta _n and factory calculated by the current learning value alpha _n δ2 is calculated and it is determined the implementation and discontinuation of the learning control, without being limited thereto, the non-contact NSW104 output voltage V _NSW were corrected in the current learning value alpha _n voltage V _n and factory The amount of deviation from the initial voltage V ₀ may be calculated to determine whether or not to perform learning control.

-Other embodiments-
In the above example, the correction amount for correcting the output voltage V _NSW of the non-contact _NSW 104 is learned and updated as a learning value, but the present invention is not limited to this. For example, to convert the output voltage V _NSW contactless NSW104 the detent rotational position theta _n, updated by learning the difference between the detent rotational position theta _n-1 of the detent rotational position theta _n and the previous after the conversion as the learned value Learning control may be implemented.

Further, by using a map (for example, a straight line shown in FIG. 8) showing the relationship between the output voltage V _NSW and detent rotational position theta _NSW contactless NSW104, calculates the detent rotational position theta _NSW from the output voltage V _NSW contactless NSW104 When learning, the deviation between the voltage V _n (or detent rotation position θ _n ) calculated from the current learning value and the previous voltage V _n-1 (or detent rotation position θ _n-1 ) is learned, and the learning value Accordingly, learning control of shifting the map (shifting up and down in FIG. 8) may be performed.

  In the above example, the range position for determining whether or not to perform learning control is the P range. However, the range position is not limited to this, and may be any one of the R range, the N range, and the D range. Moreover, you may make it determine implementation or cancellation of learning control in several range positions (including all the range positions) among P range, R range, N range, or D range.

  In the above example, an example in which the present invention is applied to a shift switching device that switches to each range of P, R, N, and D has been described. However, the present invention is not limited to this, and for example, P, R, N, D Furthermore, the present invention can also be applied to other arbitrary shift switching devices such as a shift switching device to which a second range (2) or a low range (L) is added. The present invention can also be applied to a range switching device that selectively switches between two ranges of the P range and the non-P range in conjunction with the pivoting operation of the detent plate.

  In the above example, the rotation angle of the output shaft of the actuator (the rotation shaft 102a of the speed reduction mechanism 102) is detected by the non-contact NSW 104, but instead of this, for example, the rotation position of the detent plate 106 and the manual shaft 105 You may make it detect the operation amount (rotation angle, movement amount, etc.) of the moving member driven integrally.

  In the above example, an example in which the present invention is applied to a shift switching device for a vehicle on which an automatic transmission with eight forward shifts is mounted is shown. However, the present invention is not limited to this, and any other shift stage is possible. The present invention can also be applied to a shift switching device for a vehicle equipped with the above planetary gear type automatic transmission.

  The above example shows an example in which the present invention is applied to a shift switching device for a vehicle equipped with a planetary gear type transmission that sets a gear ratio using a friction engagement element such as a clutch and a brake and a planetary gear device. However, the present invention is not limited to this, and can also be applied to a shift switching device for a vehicle equipped with a continuously variable transmission such as a belt type continuously variable transmission (CVT).

  In the above example, an example in which the present invention is applied to a shift switching device mounted on an FR (front engine / rear drive) type vehicle has been shown, but the present invention is not limited thereto, and the FF (front engine It can also be applied to a shift switching device mounted on a front drive) type vehicle or a four-wheel drive vehicle.

It is a block diagram which shows the structure of the control system of the shift switching apparatus of this invention. FIG. 2 is a diagram illustrating a schematic configuration diagram illustrating an example of an automatic transmission and a block diagram of a control system. 3 is an operation table of the automatic transmission shown in FIG. 2. It is a perspective view which shows the structure of the shift lever part of a shift apparatus. It is a perspective view which shows schematic structure of a shift range switching mechanism. It is a longitudinal cross-sectional view which shows the structure of the spline fitting part of a manual shaft. It is explanatory drawing of learning control at any time. It is a figure which shows the deviation | shift amount of the detent rotation position calculated with a present learning value, and the detent rotation position calculated with the last learning value. It is a figure which shows the deviation | shift amount of the detent rotation position calculated by a present learning value, and the detent rotation position at the time of factory shipment. It is a flowchart which shows an example of the control routine which controls implementation and cancellation of learning control.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shift switching device 3 Automatic transmission 100 Shift range switching mechanism 101 Motor (actuator)
102 Deceleration mechanism 102a Rotating shaft 103 Encoder 104 Non-contact NSW
105 Manual shaft 106 Detent plate 106a Recess 107 Detent spring 108 Roller 200 SBW_ECU
300 ECT_ECU
400 Power supply ECU
401 Ignition switch

Claims (12)

A by-wire shift switching device that switches a shift range by an actuator,
Learning position information detecting means for detecting position information of a moving member that moves by the driving force of the actuator based on the output of a non-contact sensor, and a correction amount for correcting the detection result of the position information detecting means at a specific range position Learning control means that learns and updates as a value, and when the learning control is started, the deviation amount between the position information calculated from the current learning value and the position information indicating the specific range position does not satisfy the determination criterion A shift switching device comprising learning control stopping means for stopping learning. The shift switching device according to claim 1, wherein
The learning control stop unit learns when the amount of deviation between the position information calculated from the current learning value and the position information calculated from the previous learning value is equal to or larger than the first determination value when starting the learning control. A shift switching device characterized by canceling. The shift switching device according to claim 2, wherein
The shift switching device according to claim 1, wherein the first determination value is set to a value larger than a maximum value of a backlash of a fitting portion between the actuator and the moving member. The shift switching device according to claim 1, wherein
The learning control stop means, when starting the learning control, learns when the amount of deviation between the position information calculated from the current learning value and the initial position information of the specific range position is equal to or greater than a second determination value. A shift switching device characterized by stopping. The shift switching device according to claim 4, wherein
The shift switching device, wherein the second determination value is set in consideration of a maximum value of a deviation amount from the initial position information, which is assumed due to deterioration with time of the shift switching device. The shift switching device according to claim 1, wherein
The learning control stopping means learns when the amount of deviation between the position information calculated from the current learning value and the position information calculated from the previous learning value is equal to or less than a third determination value when starting the learning control. A shift switching device characterized by canceling. The shift switching device according to claim 6, wherein
The shift switching device, wherein the third determination value is a maximum value of a backlash of a fitting portion between the actuator and the moving member. The shift switching device according to claim 6 or 7,
The shift is characterized in that it is not determined whether or not the deviation amount is equal to or less than a third determination value when the looseness control of the fitting portion between the actuator and the moving member is performed. Switching device. In the shift switching device according to any one of claims 1 to 8,
The shift switching device according to claim 1, wherein the position information is a rotational position of a detent member that is rotated by a driving force of the actuator. In the shift switching device according to any one of claims 1 to 9,
Shift switching characterized by determining whether or not to perform the learning at any one or a plurality of range positions of a parking range position, a reverse range position, a neutral range position, or a drive range position apparatus. In the shift switching device according to any one of claims 1 to 10,
A shift switching device characterized in that the learning control start condition is when the power state of a vehicle on which the shift switching device is mounted is changed from ignition off to ignition on. In the shift switching device according to any one of claims 1 to 11,
The shift switching device, wherein the non-contact sensor is a Hall element or a Hall IC.

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