JP2006194419A - Selection assistant unit of automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a selection assistant unit of an automatic transmission that can expand the layout degree of freedom by downsizing a selection lever and also obtain selection lever operation power performance corresponding to a demand while enabling a range switching operation at the time of a fail by the mechanical connection of the selection lever and the selection position switching unit. <P>SOLUTION: A position sensor 61 to detect an operative position and a position sensor 62 to detect a working position have a board 63 in common and set up both resisters 614, 624 on one face of the board 63 and the resisters 614, 624 are connected electrically at a connection part 64a to 64e so as to be in a ladder state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to a technical field of a selection assist device for an automatic transmission that switches a selection position of the automatic transmission by control according to an operation of a driver's select lever in a vehicle equipped with the automatic transmission.

  Conventionally, a select lever of an automatic transmission is mechanically connected to a manual valve of the automatic transmission via an operating force transmission means such as a rod or a cable. The driver's operating force input to the select lever is transmitted to the manual valve via the operating force transmitting means, and the select position is switched according to the operation amount (see, for example, Patent Document 1).

On the other hand, what uses what is called shift-by-wire technique in which the select lever and the manual valve are electrically connected is known. In this prior art, an actuator that operates a manual valve is provided, and the select position is switched by driving the actuator by changing the rotation operation of the select lever into an electric signal (see, for example, Patent Document 2).
JP-A-9-323559 JP 2003-97694 A

  When the select lever is operated, a mechanical operating reaction force such as friction of the operating force transmission means, resistance of detent, etc. is generated, and thus a large operating force is required. Therefore, in order to reduce the necessary operating force of the driver, it is necessary to set the length of the select lever to a length that can obtain a sufficient lever force.

  Therefore, the former of the above prior arts has a problem that the shape becomes large due to the length of the select lever, so that there are many restrictions on the installation place and the degree of freedom in layout in the vehicle interior is low.

  On the other hand, in the latter, the selection lever can be designed shorter by adopting the actuator, and the degree of freedom in layout becomes higher than that in the former. However, since the select lever and the manual valve are not mechanically connected, the range cannot be switched during a failure.

  The present invention has been made paying attention to the above-mentioned problem, and the object of the present invention is to reduce the size of the select lever while enabling the range switching operation at the time of failure by mechanically connecting the select lever and the select position switching device. It is an object of the present invention to provide a selection assist device for an automatic transmission that can increase the degree of freedom in layout and can obtain select lever operation characteristics according to requirements.

  In order to achieve the above object, in the select assist device for an automatic transmission according to the present invention, a select lever and a select position switching device for the automatic transmission are connected by a select operation force transmission system, and the select operation force transmission system In the automatic transmission select assist device provided with an assist actuator for assisting the select operation force by the driver, an operation position detecting means for detecting the operation position of the select lever is provided, and the operating position of the select position switching device is determined. A potentiometer provided with an operating position detecting means for detecting, wherein the operation position detecting means and the operating position detecting means change a relative position where the resistor and the electrode are in contact with each other, and detect a position by changing a resistance value of the resistor. The potentiometer that detects the operating position and the potentiometer that detects the operating position Characterized by being electrically connected at a plurality of points of each resistor over data.

  In the present invention, while maintaining the mechanical connection between the select lever and the select position switching device, the select position switching device of the automatic transmission is switched by the control drive according to the operation of the driver's select lever, so that at the time of failure Both securing the range switching operation and increasing the degree of layout freedom by downsizing the select lever can be achieved.

  Hereinafter, an embodiment for realizing a select assist device for an automatic transmission according to the present invention will be described based on examples.

First, the configuration will be described.
FIG. 1 is a side view showing a configuration of an automatic transmission apparatus according to a first embodiment, and FIG. 2 is a perspective view of a main part showing a detailed structure of a select section.

As shown in FIG. 1, the automatic transmission device according to the first embodiment mainly includes a selection unit 1, an assist actuator 2, a controller 3, a control cable 4, and an automatic transmission 5.
The select unit 1 includes a select lever 11, a select knob 12, a first rotating unit 13 (corresponding to a first connecting member), a check mechanism unit 14, a worm wheel 16, and a second rotating unit 17 (corresponding to a second connecting member). ), A cable mounting lever 18 and a fulcrum shaft 19.
The select lever 11 is provided at a position where it can be operated from the driver's seat, and a select knob 12 is attached to the tip of the select lever 11 for a driver to hold when selecting. The select lever 11 is attached to the first rotating unit 13, and the first rotating unit 13 is rotated about a fulcrum shaft 19. As a result, the select lever 11 can be rotated. The select lever 11 is set to 100 mm, which is 250 mm shorter than a conventional general select lever.

Further, the fulcrum shaft 19 is provided with a second rotating portion 17 so as to be rotatable. The second rotating part 17 is coaxial with the first rotating part 13 but has a structure capable of relative rotation.
A worm wheel 16 is provided on one end side of the second rotating portion 17, and a cable attachment lever 18 is provided on the opposite side of the worm wheel. The end of the control cable 4 is attached to the cable attachment lever 18, and the opposite end is attached to the control arm 51 of the automatic transmission 5.
In the first rotating unit 13 and the second rotating unit 17 that can rotate relative to the same rotating shaft (fulcrum shaft 19), the first rotating unit 13 has a play having a predetermined length in the circumferential direction. A groove 131 is provided. The second rotating portion 17 is provided with a protrusion 171 so as to be positioned in the play groove 131. As a result, the relative rotation between the first rotating portion 13 and the second rotating portion 17 is within a range in which the protrusion 171 can move between the play grooves 131. (The idle groove 131 of the first rotating portion 13 and the protrusion 171 of the second rotating portion 17 constitute an idle connecting mechanism which is a relative displacement allowable connecting mechanism.)
The assist actuator 2 is an electric motor. A worm 21 is provided on the output shaft of the assist actuator 2 to be engaged with the worm wheel 16 to form a worm gear. The assist actuator 2 rotates the second rotating portion 17. . Further, a position sensor 61 (corresponding to an operation position detecting means) for detecting the stroke angle of the first rotating portion 13 with respect to the fixed member, that is, the operation angle of the select lever 11, is provided at the fulcrum shaft 19. Further, the fulcrum shaft 19 is provided with a position sensor 62 that detects the stroke angle of the second rotating portion 17 with respect to the fixed member, that is, the rotational position of the control arm 51 of the automatic transmission 5 via the control cable 4. The position sensor 61 and the position sensor 62 correspond to elastic displacement amount detection means.
Furthermore, a check mechanism portion 14 is provided on the opposite side of the first rotating portion 13 to the select lever 11. The check mechanism unit 14 includes a pin 141 that protrudes from the first rotating unit 13 to the outer peripheral side, and a groove 142 that engages with the pin 141. Although not shown in detail, the pin 141 has a structure in which the tip is biased by a spring in the protruding direction from the inside. The tip of the pin 141 is engaged with the groove 142. The groove part 142 is wave-shaped so as to form a valley part 142a corresponding to five ranges (P, R, N, D, and L). ). The check mechanism unit 14 holds the selected select position, and prevents an unintended range select input due to, for example, vibration of the vehicle without any operation.

Furthermore, the configuration of the first embodiment will be described in detail with reference to FIG.
Bearings B1, B2, and B4 are provided on the outer periphery of the fulcrum shaft 19, and the second rotating portion 17 is provided on the outer periphery of the bearings B2 and B4. A bearing B <b> 3 is provided on the outer periphery of the second rotating portion 17, and the outer periphery of the bearings B <b> 1 and B <b> 3 is attached to the casing 22. As a result, the first rotating portion 13 fixed to the fulcrum shaft 19 is rotatable with respect to the casing 22 and the second rotating portion 17 that are the fixing members, and the second rotating portion 17 is the casing 22 and the fixing member that are the fixing members. The first rotating unit 13 is rotatable. As a result, the first rotating part 13 and the second rotating part 17 are relatively rotatable.

Position sensors 61 and 62 are provided at the end of the fulcrum shaft 19 and the second rotating portion 17.
A rotating body 611 that is formed in a bowl shape and has a portion facing the substrate 63 is provided on the end portion of the fulcrum shaft 19 that rotates integrally with the first rotating portion 13.
Next, a rotating body 621 having a hook-shaped portion is provided at the end of the second rotating unit 17 on the substrate 63 side. The rotating body 621 has a surface facing the substrate 63 on the outer side of the flange portion of the rotating body 611. The substrate 63 is fixed to the casing 65 of the position sensors 61 and 62, and the casing 65 is fixed to the casing 22. Therefore, the ring-shaped plane with a small diameter of the rotating body 611 and the ring-shaped plane with a large diameter of the rotating body 621 are rotated relative to the substrate 63 to be fixed.
The substrate 63 is provided on the end of the fulcrum shaft 19 having a small diameter so that the axial direction and the plane are orthogonal to each other. The rotating bodies 611 and 621 are provided with brushes 612 and 622.

Here, the substrate 63 will be described in detail with reference to FIG.
A thin arc-shaped electrode 613 centering on the rotation center of the fulcrum shaft 19 is provided on the surface of the substrate 63 on the rotating body 611, 621 side, and a thin arc-shaped resistor is provided with a small interval on the outer peripheral side of the electrode 613. 614 is provided. The brush 612 is made of a material that is electrically energized, so that two contacts extend from a portion fixed to the rotating body 611, one contacts the electrode 613, and the other contacts the resistor 614. To touch.

  Next, a resistor 624 is provided in a thin arc shape on the outer peripheral side by an interval from the resistor 614 to the brushes 612 and 622, and a thin arc-shaped electrode 623 is provided on the outer peripheral side of the resistor 624 with a small interval. Similarly to the brush 612, the brush 622 has two contacts extending so that one contacts the resistor 624 and the other contacts the electrode 623. The electrodes 613 and 623 and the resistors 614 and 624 are provided so that the angular range of the arc is the same. This angle range is a detection range of the operation position of the select lever 11 and a detection range of the operation position of the control arm 51.

  Further, the resistors 614 and 624 are electrically connected at five connection portions 64a to 64e as shown in FIG. These five positions are positions corresponding to the range positions of P, R, N, D, and L, respectively. As a result, the resistors 614 and 624 and the connecting portions 64a to 64e become ladders.

The controller 3 (corresponding to the assist control means) sets a command value for the assist actuator 2 based on the detected relative position, and performs PWM control on the output duty ratio of the electric motor.
FIG. 3 shows a control block diagram of the controller 3.
In the selector 1, the change in the stroke of the select lever 11 that has been subjected to the range switching operation becomes a relative rotational change in the first rotating part 13 and the second rotating part 17, and a change in the relative displacement amount between the play groove 131 and the protrusion 171. . The rotational displacement of the first rotating unit 13 is detected by the position sensor 61 as a stroke change of the select lever 11, for example, based on the position corresponding to the P range, and is output to the controller 3. The rotational displacement of the second rotating unit 17 is detected by the position sensor 62 and output to the controller 3. Therefore, the rotational deviation between the position sensor 61 and the position sensor 62 becomes the relative displacement amount.

  The relative displacement calculation unit 31 calculates a relative displacement deviation from the operation position and the operation position.

  The drive command value calculation unit 32 calculates the drive command value of the assist actuator 2 so as to reduce the relative displacement deviation, that is, to bring the relative displacement amount close to zero.

  The motor drive control unit 33 drives the assist actuator 2 based on the drive command value.

Next, the detent structure of the automatic transmission 5 will be described.
FIG. 4 is a perspective view showing a detent structure of the automatic transmission 5.
The control arm 51 is provided with a rotation shaft 52, and a detent plate 53 is supported on the rotation shaft 52. At the upper end of the detent plate 53, a valley portion 53b corresponding to five ranges (P, R, N, D, and L) is formed between the cam peaks 53a. Then, the detent pin 55 formed at the tip of the spring plate 54 is engaged with the valley portion 53b, and the selected selection position is held, thereby preventing an unintended range selection due to vehicle vibration or the like. Yes.

  That is, the rotating shaft 52 is rotated by the operating force of the assist actuator 2 or the operating force of the select lever 11, and the detent plate 53 is moved relative to the detent pin 55 according to this rotation. At this time, the detent pin 55 gets over the cam crest 53 a and engages with the valley 53 b corresponding to the adjacent range, and the engaged state is held by the elastic force of the spring plate 54. This elastic force becomes the main load force when performing the selection operation.

Note that one end of a parking rod 56 is rotatably connected to the detent plate 53. The parking rod 56 prevents rotation of the parking gear 58 via the cam-like plate 57 and locks driving wheels (not shown) when the select lever 11 is moved to the P range. As a result, when the vehicle is parked on the slope road in the P range, a vehicle load is applied so as to lock the drive wheels according to the slope, and acts as a force for biting the parking rod 56.
In the first embodiment, the detent force (check force) works in the automatic transmission 5 and the selection unit.

Next, the operation will be described.
[Automatic transmission select position control process]
FIG. 5 is a flowchart showing a basic process flow of the select position control process executed by the controller 3.

  In step S1, the relative position displacement amount signal from the position sensor 6 is input, and the displacement amount of the relative position is read.

  In step S2, the deviation from the midpoint of the relative position is calculated from the read relative position.

  In step S3, a motor torque command value is set from the deviation from the midpoint of the relative position.

  In step S4, the electric motor of the assist actuator 2 is driven according to the motor torque command value.

[Operation reaction force characteristics of automatic transmission]
FIG. 6 is a characteristic diagram showing an operation reaction force generated on the output shaft of the assist actuator 2 in the P → R range direction and an operation reaction force generated on the select knob 12 in the connected state. This operation reaction force characteristic is obtained by comparing the operation reaction force [N] on the output shaft and the operation reaction force [N] on the select lever 11 with the operation position (stroke angle) of the select lever 11.

  When the operating force of the select lever 11 is transmitted to the automatic transmission 5, the operating reaction force of the select lever 11 is combined with the load force generated by the detent in the select unit 1 described above and the frictional force of the mechanism. It is what. Therefore, when the range switching operation is performed during the range switching control, a manual operation exceeding this operation reaction force is required.

The operation reaction force on the output shaft of the electric motor of the assist actuator 2 is obtained by combining the friction force of the control cable 4 and the inertia of the electric motor with the load force generated by the detent of the automatic transmission 5 described above. . Therefore, the range switching by the assist actuator 2 requires a driving force that is greater than the operation reaction force.
As shown in FIG. 6, the operation reaction force generated when the select lever 11 is operated in the P → R range direction is the same as the operation direction of the select lever 11 or the driving direction of the assist actuator 2 between the ranges. It occurs in the reverse direction (D → N range direction), changes direction after the peak, occurs in the same direction as the operation direction (P → R range direction), and converges to zero near the range switching position (stop position) Become. This characteristic is caused by a load force generated when the detent pin 55 or the pin 141 gets over the cam mountain 53a or the cam mountain of the groove 142. That is, until the detent pin 55 or the pin 141 gets over the cam crest 53a or the cam crest of the groove 142, a resistance force is generated by a biasing force of a spring (not shown) that biases the spring plate 54 or the pin 141. This is because the detent pin 55 or the pin 141 falls into the groove or the groove 53b of the next cam mountain 53a and the pulling force (inertial force) is generated after the pin 141 gets over the cam mountain 53a or the cam mountain of the groove 142. .

[Automatic transmission range switching control]
In the select assist device for the automatic transmission according to the first embodiment, as an example of the state before the operation, the first rotating portion 13 and the second rotating portion 17 are in a non-connected state, and the protrusion 171 has a relative position in the idle groove 131. Is in the middle position, that is, in a state having a margin with respect to either operation direction (see FIG. 8A).

  From this state, for example, when the select lever 11 is started to operate, the relative displacement amount of the play groove 131 and the protrusion 171 changes. However, since it is within the position range in the unconnected state, the control cable 4 does not move. This change in the relative displacement amount is detected by the position sensors 61 and 62, and the motor command control value corresponding to the deviation of the relative position is set by the drive command value calculation unit 32 so that the electric motor of the assist actuator 2 is driven. Is done. The drive output of the assist actuator 2 is transmitted to the worm wheel 16 by the worm 21, the second rotating portion 17 rotates, and the control arm 51 of the automatic transmission 5 is driven via the control cable 4 to select the automatic transmission. The position is switched.

In addition, when the control cable 4 advances and retreats by the rotation of the second rotating portion 17, the relative position of the play groove 131 and the protrusion 171 returns to the vicinity of the midpoint.
That is, by controlling the drive command value calculation unit 32, the relative position displacement amount is held near the midpoint of the relative position, so that the movement by the operation of the select lever 11 is performed as shown in FIGS. Following this, the control arm 51 of the automatic transmission is driven to switch the select position.
This movement is as if the select lever 11 and the control arm 51 of the automatic transmission 5 are connected by the control cable 4.
As an example, FIG. 7 shows a change state of the relative position when moving from the P range to the R range. When the angle input to the select lever 11 is an operation angle and the angle of the control arm 51 is an operation angle, the relationship between the operation angle and the operation angle is as shown in FIG. That is, at the beginning of the control, the operating angle follows the operating angle with a delay, and the operating angle precedes the operating angle in the second half of the control by the suction force to the next range by detent.

[Improved operation feeling]
In the first embodiment, when the normal control is performed as described above, the relative positions of the play groove 131 of the first rotating portion 13 and the protrusion 171 of the second rotating portion 17 are maintained at the middle point. Therefore, the first rotating portion 13 and the second rotating portion 17 are connected as a mechanical transmission system in the middle of the operation, and the shock is not transmitted to the select lever 11 and the operation feeling is not lowered.

  Thereby, the operation feeling in the first embodiment is generated only by the check mechanism unit 14 of the selection unit 1. Therefore, it is possible to make the light operation feeling of the select lever 11 very good with respect to the shape, size, spring strength, etc. of the cam crests in the groove 142 and the pin 141, which is smaller than the conventional one.

[Improves the feeling of operation when starting on a steep slope and reduces the size and weight]
When performing a select operation from the P range to the D range in an attempt to start a steep slope, the force for pulling out the parking rod increases and the operation force increases. In the select assist device for the automatic transmission according to the first embodiment, when the load is large as described above, the protrusion 171 comes into contact with the end of the play groove 131, that is, there is no play amount in the play mechanism. The operating force input to the select lever 11 is transmitted to the second rotating portion 17 and the control cable 4, and the assisting force of the electric motor of the assist actuator 2 is added to this to pull out the parking rod 56. Is a light operation, and as a system, the rating of the electric motor can be reduced and the system can be reduced in size and weight.

[Improving operation feeling and reducing costs in sudden shift operations]
In the select assist device for the automatic transmission according to the first embodiment, when a sudden selection operation is performed, the protrusion 171 comes into contact with the end of the play groove 131, that is, there is no play amount in the play mechanism. The operating force input to the select lever 11 is transmitted to the second rotating portion 17 and the control cable 4, and the assist force of the electric motor of the assist actuator 2 is added thereto. As a result, the operation feeling is light, and the system requires less responsiveness to the electric motor, thereby reducing the rated size of the motor.

[Mechanical connection of select lever and control arm of automatic transmission]
Further, in the first embodiment, during a failure, if the select lever 11 is operated beyond the position range of the non-connected state, the movable amount, that is, the play amount disappears in the operation direction, and the control cable 4 enters the connected state. The control arm 51 of the automatic transmission 5 can be operated by the operating force via

[Accuracy of position sensor]
The position sensors 61 and 62 used in the first embodiment slide the brushes 612 and 624 with respect to the electrodes 613 and 623 and the resistors 614 and 624 on the substrate 63, whereby the brushes 612 and 624 are moved. The length of the resistors 614 and 624 that are electrically connected to the electrodes 613 and 623 through the wiring changes, the volume of the resistors 614 and 624 that are energized changes, and the output whose resistance value has changed is output. Obtainable.

As shown in FIG. 12, the position sensors 61 and 62 have a variation in linearity with respect to a reference output due to non-uniform thickness of the resistors 614 and 624. When there is such a variation, the characteristics of the two position sensors 61 and 62 are as shown in FIG. 13 as an example, resulting in a variation that causes a deviation between the operation position and the operation position. That is, there is a problem that when the assist actuator 2 is driven by the controller 3 and the operation position is made to follow the operation position, even if the position is the same for control, there is actually a deviation.
In the first embodiment, this problem is solved by the structure of the position sensor.

[Action to suppress displacement of position sensor]
In the first embodiment, when the fulcrum shaft 19 and the first rotating portion 13 are rotationally displaced by the operation of the select lever 11 that is fixedly connected, the rotating body 611 attached to the fulcrum shaft 19 is rotated, thereby the brush 612. Is rotated relative to the electrode 613 and the resistor 614 of the substrate 63 to change the resistance value, whereby the operation position is detected.

  In addition, when the assist actuator 2 is driven so that the deviation becomes small with respect to this operation position, and the control arm 51 connected by the second rotating unit 17 and the control cable 4 is rotationally displaced, the second rotating unit 17 The rotating body 621 attached to the shaft portion rotates, so that the brush 622 rotates relative to the electrode 623 and the resistor 624 of the substrate 63 while sliding relative to each other, and the operating value is detected by changing the resistance value. Is done.

In any one of the range positions of P, R, N, D, and L, when the operation position follows the operation position by control and becomes the same position, in the first embodiment, as shown in FIG. Since the resistors 614 and 624 are electrically connected by any of the connecting portions 64a to 64e at positions corresponding to the range positions of P, R, N, D, and L, At that position, the potential is the same, that is, the output voltage as the sensor is the same.
Thus, the position sensors 61 and 62 have the same output value at the position corresponding to each range position.
Then, forcibly making the same output at a plurality of points of the characteristics of the position sensors 61 and 62 reduces characteristic deviation.
Therefore, the detection deviation between the operation position and the operation position is reduced, and the assist actuator 2 can be controlled with high accuracy.

  In addition, when the range operation is completed, the same position, that is, the detection deviation disappears when the range operation is completed, so that the operation position and the operation position do not deviate when the range operation ends, and the position is stably positioned at the range stop position in the detent mechanism. It will be.

  Further, in the control for the next operation, the operation delay and the overshoot caused by the shift of the range stop position are suppressed.

Next, the effect will be described.
In the automatic transmission select assist device of the present embodiment, the following effects can be obtained.
(1) The select lever 11 has a projection amount of about 150 mm less than the conventional select lever, and the select lever 11 and the control arm 51 are connected via the control cable 4 with a play amount. Therefore, the degree of freedom of the vehicle interior layout is greater than that of the conventional product, and the select lever 11 can be set at any location in the vehicle interior such as an instrument panel.
Further, since the select lever 11 and the control arm 51 are mechanically connected by the control cable 4 with a play amount, the driver manually switches the select position even when the assist actuator 2 or the controller 3 fails. be able to.

In addition, the engagement of the idle groove 131 of the first rotating portion 13 and the protrusion 171 of the second rotating portion 17 provides a non-connected state and a connected state, and maintains a neutral state within the set play amount. At this time, it is possible to prevent a sense of incongruity due to the transition from the unconnected state to the connected state.
Further, in the first embodiment, since the normal state is set to the non-connected state, it is preferable to operate with a light force in accordance with the downsizing of the select lever 11 without receiving the subsequent frictional resistance received in the connected state. An operation feeling can be generated by the check mechanism unit 14 of the selection unit 1.
Further, in the first embodiment, since there is a play amount in a non-connected state, adjustments that are synchronized with each other when the select lever 11 side and the automatic transmission 5 side are assembled can be simplified, and can be assembled to a vehicle. Can be improved.

  Further, when starting on a steep slope where the load of the select operation system is excessive or when performing a rapid select operation, the assist force of the motor is added to the operation force of the driver, and the operation can be lightened. In addition, since the operating force can be transmitted, the system can be downsized in the motor rating and the response to the motor can be eased.

Further, advantageous effects on the shift-by-wire system in the selection assist device of the automatic transmission according to the first embodiment will be described in comparison.
In the above-described operation and effects, (A) In normal operation, the range is switched by the operating force of the actuator without transmitting the manual operating force to the automatic transmission. (B) At the time of failure, the range is switched by manual operation force without using the actuator operation force. (C) When an excessive load occurs, the range is switched by adding the manual operating force and the actuator operating force (assist state). In particular, (B) and (C) are advantageous effects for the shift-by-wire system.

  Furthermore, it is advantageous that the states (A) and (C) are also variable. That is, in the select assist device for the automatic transmission according to the first embodiment, the ratio between the driver's operating force and the assist force by the assist actuator can be changed according to the traveling state. For example, when shifting from the R range to the P range when the traveling speed is high, by weakening the assist force of the motor, the operation force of the driver is increased (heavier operation) due to erroneous finger touch selection. It is possible to prevent the vehicle from stopping suddenly. As described above, in addition to the improvement of the operation feeling, it is possible to prevent erroneous selection and to suppress those connected thereto by making the operation heavy.

Furthermore, compared to a shift-by-wire system, the shift-by-wire system has better control system response and positioning accuracy against disturbances such as the zero point movement of the potentiometer (position sensor) over time, fluctuations in power supply voltage, and circuit input voltage drift. Easy to deteriorate. In the select assist device of the automatic transmission according to the first embodiment, even if there is some fluctuation in the control system, the driver can operate by absorbing the fluctuation through the mechanical link, and thus the system has excellent robust stability.
Furthermore, when the shift-by-wire system goes down, it is necessary to search for an emergency lever and perform an operation different from the normal operation, which puts a heavy burden on the panicked driver. In the select assist device of the automatic transmission of the first embodiment, even if the operation force is heavy, the operation can be continued with normality with the same select operation as usual.

  Furthermore, in the first embodiment, the position sensor 61 and the position sensor 62 change the relative positions where the resistors 614 and 624 and the electrodes 613 and 623 are in contact with each other, and detect the position by changing the resistance values of the resistors 614 and 624. This is a potentiometer, and the resistors 614 and 624 of the position sensor 61 for detecting the operation position and the position sensor 62 for detecting the operation position are electrically connected at a plurality of points by the connecting portions 64a to 64e. Thus, the same output can be obtained by the position sensors 61 and 62, and displacement of position detection can be suppressed.

  (2) The position sensor 61 that detects the operation position and the position sensor 62 that detects the operation position share the substrate 63, and both resistors 614 and 624 are provided on one surface of the substrate 63. Since the connection portions 64a to 64e are electrically connected so as to form a ladder, the connection portions 64a to 64e are connected, so the board 63 of the two position sensors 61 and 62 is shared, a space-saving structure, and a plurality of points. The same output can be obtained.

  (4) The electrical connection of a plurality of points at the connecting portions 64a to 64e of the resistors 614 and 624 of the position sensor 61 for detecting the operation position and the position sensor 62 for detecting the operation position is determined by each range position of the automatic transmission 5. Therefore, it is possible to reliably stop at the range position and suppress subsequent control delay and overshoot.

Example 2 is an example in which two position sensors are provided on both sides of a shared substrate.
First, the configuration will be described.
In the second embodiment, as shown in FIG. 15, electrodes 613 and 623 on the inside and resistors 614 and 624 on the outside are provided in a thin arc shape on the front and back sides of the substrate 63 shared by the position sensors 61 and 62. In Example 2, the same shape is provided on both sides.
A through hole 63c that penetrates the substrate 63 and electrically connects the front and back of the substrate 63 at this portion is provided outside the resistors 614 and 624. The through holes 63c are provided at positions corresponding to the range positions of P, R, N, D, and L, and a plurality of resistors 614 and 624 are connected by the through holes 63c.

Therefore, as shown in FIG. 14, the rotating bodies 611 and 621 are structured to rotate with respect to the substrate 63 at positions sandwiching the substrate 63 from both sides.
The operation is the same as in the first embodiment. In this way, the substrate 63 may be shared and the front and back surfaces may be used to further omit the space in the outer diameter direction.

Explain the effect. The select assist device for an automatic transmission according to the second embodiment has the following effects in addition to the above (1) and (4).
(3) A position sensor 61 for detecting the operation position and a position sensor 62 for detecting the operation position.
Share the substrate 63, provide the resistors 614 and 624 on the front and back of the substrate 63, respectively, and electrically connect the resistors 614 and 624 through the through holes 63c that penetrate the substrate 63, so that the two positions By sharing the substrate 63 of the sensors 61 and 62, the same output of a plurality of points can be obtained with a space-saving structure.
Other configurations and functions and effects are the same as those of the first embodiment, and thus description thereof is omitted.

Here, the effects of the first and second embodiments will be further described.
As for the select lever 11 and the mechanism around it, since the select lever 11 is provided in the vehicle interior, it is required to save space from the degree of freedom in vehicle interior design and the layout configuration with other devices. . In the first and second embodiments, a structure in which the substrates of the two position sensors are shared enables space saving.

  In addition, the position output corresponding to the range position is the same. The position of the select lever 11 with respect to the check mechanism and the position of the control arm 51 with respect to the detent mechanism of the automatic transmission are adjusted with the control cable 4 or corresponding parts in the initial assembly state, and the positions are adjusted accurately. It is possible. On the other hand, when two position sensors are used, if the output is the same at each range position, the burden on the control side is extremely reduced, for example, correction processing for positional deviation is unnecessary. When the outputs of the two position sensors deviate at the range stop position, the control works so as to eliminate the deviation. When the deviation disappears, the control is terminated, and when the free state is reached, the detent and select on the automatic transmission 5 side are selected. The position of the check mechanism 14 of the lever 11 changes to a mechanical stable point, and the control is activated by the displacement of the position sensor to eliminate the displacement. This eliminates the repeated problem.

  Furthermore, the sliding structure of the resistor, the electrode, and the brush is advantageous in terms of cost, but it wears and changes with time because it slides. In this case, the problem is how to handle the two position sensors. On the other hand, the fact that the values of the two position sensors are the same at each range position does not change even if a change over time occurs. Even so, it can be compensated that there is no difference in the output of each range position. This greatly contributes to accurate control for long-term use.

The third embodiment is an example in which detection means with high accuracy for differentiation is provided in a region where a speed region is necessary.
First, the structure will be described.
FIG. 16 is a control block diagram of the controller in the third embodiment.
The relative displacement calculator 34 calculates a relative displacement amount from the operation position and the operation position.
The operating position calculating unit 35 (corresponding to the operating position calculating means) has a highly sensitive detection range of the second operating position from the first operating position of the position sensor 62 and the second operating position of the position sensor 66. The operating position is calculated by using the second operating position and using the first operating position for other detection ranges.

The operating speed calculation unit 36 is a differentiator and calculates the operating speed from the operating position.
The drive command value calculator 37 calculates a drive command value from the relative displacement amount and the operating speed. The drive command value calculation unit 37 performs almost PID control together with the operation speed calculation unit 36. That is, the drive command value calculation unit 37 includes an integration control unit 38, a proportional control unit 39, and a differentiation control unit 40.
The integral control unit 38 includes an integrator 381 and a multiplier 382, and calculates an integral control amount by multiplying an integral value of the relative displacement amount by an integral gain.
The proportional control unit 39 includes a multiplier 391, and calculates a proportional control amount by multiplying a relative displacement amount by a proportional gain.

In the third embodiment, the differential control unit 40 performs a control calculation regarding the operation position, and adds it to the PI control as a D control amount. Therefore, the output of the operation speed calculation unit 36 is multiplied by the differential gain by the multiplier 401 to calculate the differential control amount.
The adder 41 calculates the PI control amount by adding the integral calculation amount and the proportional calculation amount.
The subtractor 42 calculates the drive command value by adding the differential calculation amount to the PI control amount. Although the subtractor 42 is based on the relationship between the relative displacement amount (operation position−actuation position) and the operation speed, it is substantially an adder that adds the differential calculation amount to the PI control amount.

Next, in the third embodiment, the position sensors 62 and 66 for detecting the operation position will be described.
The position sensor 62 (corresponding to the first operating position detecting means) slides the resistor and the electrode in contact with the brush in the same manner as in the first or second embodiment. As shown in FIG. 17, the position sensor 66 (corresponding to high-precision differential detection means, second operation position detection means) is provided inside the electrodes and resistors of the position sensor 62, for example, in the P → R range. In order to set the pull-in area that requires speed control when operating the position and the R → P range position as the detection range, the resistor 661 and the electrode 662 are provided at two locations, and the brush 663 that contacts and slides is provided. It is a thing.
In this way, the detection by the position sensor 66 is used in the pull-in area in the switching of each range position to P, R, N, D, and L. Since the position sensor 66 performs output in which the range of each pull-in area is the entire detection range, the position sensor 66 performs detection with high sensitivity and accuracy. FIG. 18 shows the relationship between the position sensors 62 and 66 in the P → L range position direction. As shown in FIG. 18, since the position sensor 62 and the position sensor 66 have the same detection voltage and the measurement range detects a part of the position sensor 62 with the position sensor 66, the position sensor 66 is a highly sensitive sensor. It becomes.

The operation will be described.
[Input values used for speed control]
In the automatic transmission select assist device, when switching from one range position to the next range position, the detent peak of the automatic transmission is exceeded. A sudden rise in force is required, and from around the mountain to the latter half, the detent characteristic is directed from the mountain to the valley, and the driving force requires a sudden fall. In particular, in an area that requires a steep fall, it is not preferable because it feels like an operation feeling if it cannot be controlled sufficiently. In addition, it is easy to lead to an overrun that exceeds the target range position.
Further, when the operation speed is high, the driving force is required to rise and fall more rapidly. As an effective control means in such a case, it has been devised that a speed control portion, that is, a differential calculation portion is provided in the calculation of the control amount.
Thereby, the followability in view of speed is improved.
In the third embodiment, when a change in drive amount with a fast operating position is calculated by calculating a control amount by differential calculation of the operating position, a control amount corresponding to the change is obtained.

However, when all the operating positions are detected by the single position sensor 62, the speed control amount cannot be finely controlled, and the control amount is relatively large. In particular, in order to detect and control a change in the operating position in a part between certain range positions, there is a problem with this relatively large control amount.
On the other hand, in the third embodiment, these problems are solved by providing the position sensor 66.

[Operation position switching process]
FIG. 19 is a flowchart showing a flow of operation position switching processing executed by the controller of the third embodiment. Each step will be described below.
In step S11, the operation position (X1), the first operation position (X2-1), and the second operation position (X2-2) are detected.

  In step S12, it is determined whether or not the first operating position is out of the second operating position range (C1 <X2-1 <C2orC3 <X2-1 <C4). If it is out of the second operating position range, the process proceeds to step S13. If it is within the second operating position range, the process proceeds to step S14.

  In step S13, the operating position is set to the first operating position (X2 = X2-1).

  In step S14, the operating position is set to the second operating position (X2 = X2-2).

  In step S15, a relative displacement amount between the operation position and the operation position is calculated (ΔX = X1-X2).

  In step S16, a drive command value is calculated from the relative displacement amount.

[Operation that can sufficiently control the speed]
In the third embodiment, the position sensor 66 detects a pull-in area toward the valley of the detent characteristic in response to an operation to each range position in both the P → L direction and the L → P direction. Since the position sensor 66 performs an output equivalent to that of the position sensor 62 with the pull-in area to each range position as the entire detection range, the detection is highly sensitive and accurate.
Therefore, the second operation position with high accuracy is obtained in the pull-in region where speed control is particularly necessary.

  When this second operating position is differentiated and multiplied by a differential gain to calculate and control the differential control amount of the drive command value, the speed control required by the operating position can be determined more finely and accurately. The driving force in the pull-in area is controlled in a state closer to ideal. Therefore, in the operation feeling in the pull-in area, there is no uncomfortable feeling that can be brought, and conversely, there is no uncomfortable feeling that the brake is applied. Sufficient speed control can be performed.

In other words, the operational effects of the third embodiment will be described.
In the third embodiment, the sensitive part is provided only for detecting the operating position. For this reason, the cost is reduced compared to providing a highly sensitive portion at the operation position.
Further, the differential control amount added to the PI control using the relative displacement as the deviation input uses the operating position as the deviation input. This means that the control amount is calculated based on the speed of the operating position regardless of the operating speed of the operating position, and speed control is performed with higher sensitivity. That is, the operation position of the select lever 11 is also pulled by the check mechanism unit 14, whereas when the relative displacement is used as a deviation input, the change speed of the operation position with respect to the operation position becomes a difference. When the operating position is set as a deviation input, the speed is an absolute value of the operating position that is a value relative to 0 and is not a relative value, and this is multiplied by a gain. That is, control with good speed responsiveness can be obtained.

Explain the effect. The select assist device for an automatic transmission according to the third embodiment has the following effects.
(5) The first rotating unit 13 and the second rotating unit 17 are connected with play, and the controller 3 for controlling the driving of the assist actuator 2 is provided, so that high accuracy for differentiation is detected in an area requiring speed control. Since the means is provided, an accurate differential value can be obtained, fine speed control can be performed with high accuracy, and the operational feeling can be improved.

  (6) A position sensor 61 for detecting the operation position of the select lever 11 is provided, a position sensor 62 for detecting the operating position of the control arm 51 is provided, and a position sensor 66 having a detection range narrower and higher sensitivity than the position sensor 62 is provided. The controller 3 includes an operation position, a first operation position from the position sensor 62, a second operation from the position sensor 66, a relative displacement calculation unit 34, an operation position calculation unit 35, an operation speed calculation unit 36, An accurate differential value can be obtained because the drive command value is calculated by the drive command value calculation unit 37 and the second operating position is used for the differential control unit 40 that performs at least the differential calculation in the calculation of the drive command value. Thus, fine speed control can be performed with high accuracy, and the operation feeling can be improved.

  (10) The controller 3 determines whether or not the operating position is within the detection range of the position sensor 66 and switches the outside of the detection range of the position sensor 66 as the detection range of the position sensor 62 to calculate the operating position. Since the position calculation unit 35 is provided, only necessary portions can be controlled and calculated with high accuracy while performing the overall control calculation satisfactorily.

  (11) Since the detection range of the position sensor 66 is a region where the change speed of the operating position is large, speed control by accurate differential calculation can be used most effectively, and sudden pulling of the operating position can be prevented. it can.

The fourth embodiment is an example in which the second operation position and the second operation position with increased sensitivity are detected.
The configuration will be described.
In the fourth embodiment, with respect to the position sensor 61 that detects the operation position, in the same manner as in the third embodiment, the pull-in area in the detent characteristic is set as the entire detection range in both the P → L direction and the L → P direction. A highly sensitive position sensor 67 (corresponding to the second operation position detecting means) is provided.
Since the structure of the position sensor 67 is the same as that of the position sensor 66, description thereof is omitted.

FIG. 20 is a control block diagram of the controller in the fourth embodiment.
In the fourth embodiment, the position sensor 61 (corresponding to the first operation position detecting means) to the first operation position, the position sensor 67 to the second operation position, the position sensor 62 to the first operation position, and the position sensor 66. The second operating position is input to the controller 3.
The operation position calculation unit 43 (corresponding to the operation position calculation means) has a detection range of the second operation position with high sensitivity from the first operation position of the position sensor 61 and the second operation position of the position sensor 67. The operation position is calculated by using the second operation position and using the first operation position for other detection ranges.

The relative displacement calculator 44 calculates a relative displacement amount from the operation position and the operation position.
The relative displacement speed calculator 45 is a differentiator and calculates a relative displacement speed from the relative displacement amount.
The drive command value calculation unit 46 calculates a drive command value from the relative displacement amount and the relative displacement speed. The drive command value calculation unit 46 performs PID control. Specifically, the drive command value calculation unit 46 includes an integration control unit 38, a proportional control unit 39, and a differentiation control unit 40. Since the integration control unit 38 and the proportional control unit 39 are the same as those in the third embodiment, description thereof is omitted.
The differential control unit 47 includes a relative displacement speed calculation unit 45 and a multiplier 471, and calculates a differential control amount by multiplying the relative speed calculated by the relative displacement speed calculation unit 45 by a differential gain.
The adder 48 adds the control calculation amounts calculated by the integration control unit 38, the proportional control unit 39, and the differentiation control unit 47, calculates a drive command value, and outputs it to the motor drive control unit 33.

The operation will be described.
[Switching between operating position and operating position]
FIG. 20 is a flowchart showing the flow of operation position switching processing executed by the controller of the fourth embodiment. Each step will be described below.
In step S21, the first operation position (X1-1), the second operation position (X1-2), the first operation position (X2-1), and the second operation position (X2-2) are detected. .

  In step S22, it is determined whether the detection range is the second operation position from the first operation position (C1 <X1-1 <C2orC3 <X1-1 <C4). The process proceeds to S23, and if it is out of the detection range, the process proceeds to Step S26.

  In step S23, the second operation position is used as the operation position (X1 = X1-2).

  In step S24, it is determined whether or not the detection range is the second operation position from the first operation position (C5 <X2-1 <C6orC7 <X2-1 <C8). Proceed to S28.

  In step S25, the second operating position is used as the operating position (X2 = X2-2).

  In step S26, the first operation position is used as the operation position (X1 = X1-1).

  In step S27, it is determined whether or not the detection range is the second operation position from the first operation position (C5 <X2-1 <C6orC7 <X2-1 <C8). Proceed to S28.

  In step S28, the first operating position is used as the operating position (X2 = X2-1).

  In step S29, a relative displacement amount is calculated from the operation position and the operation position (ΔX = X1-X2).

  In step S30, a drive command value is calculated from the relative displacement amount ΔX.

[Operation that can sufficiently control the speed]
In the fourth embodiment, when the detection range of the position sensors 66 and 67, that is, the pull-in area is reached, this is detected by the processing of steps S22, S24, and S27, and switched to the second operation position and the second operation position. . Therefore, the second operation position and the second operation position are detected for the pull-in area in the operation in both the P → L direction and the L → P direction, and the second operation position and the second operation position are detected. The relative displacement amount is calculated from the position, and PID control is performed to reduce the relative displacement amount.
In other words, in the fourth embodiment, in the pull-in area, integral control, proportional control, and differential control are all performed on a highly accurate input. As in the third embodiment, the speed control can be sufficiently performed, and the entire control becomes more accurate control.
In other words, the drive control amount can be calculated more accurately so that the proportional control is accurately performed in the region where the pulling force due to the detent characteristic works, so that the drive control amount is not more than necessary. Further, by performing the integral control with high accuracy, the integral control amount whose operating position matches the operating position more accurately is calculated. Further, the differential calculation is also more accurate, and overshoot and overrun due to excessive drive amount are suppressed. Therefore, the operating position accurately follows the operating position.

Explain the effect. The select assist device for the automatic transmission according to the fourth embodiment has the following effects in addition to the above (5), (10), and (11).
(7) A position sensor 62 for detecting the operating position of the control arm 51 is provided, a position sensor 66 having a detection range narrower and higher sensitivity than the position sensor 62 is provided, and a position sensor 61 for detecting the operation position of the select lever 11 is provided. , A position sensor 67 having a narrower detection range and higher sensitivity than the position sensor 61 is provided, and the controller 3 controls the first operation position from the position sensor 61, the second operation position from the position sensor 67, and the position sensor 62. In order to calculate the drive command value from the first operation position, the second operation position from the position sensor 66, and to use the second operation position and the second operation position at least for the differential calculation in the calculation of the drive command value, An accurate differential value can be obtained, fine speed control can be performed with high accuracy, and the operational feeling can be improved.

  (8) The controller 3 determines whether or not the operation position is within the detection range of the position sensor 67, and switches the outside of the detection range of the position sensor 67 as the detection range of the position sensor 61 to calculate the operation position. Since the operation position calculation unit 43 is provided, only the necessary portions can be calculated with high accuracy while performing the overall control calculation satisfactorily.

  (9) Since the detection range of the position sensor 67 is a region where the change speed of the operation position is large, speed control by accurate differential calculation can be used most effectively, and sudden pulling of the operation position can be prevented. it can.

(Other embodiments)
As mentioned above, although embodiment of this invention has been demonstrated based on Examples 1-4, the concrete structure of this invention is not limited to an Example, The range which does not deviate from the summary of invention. Design changes and the like are included in the present invention.
It should be noted that the first and second embodiments and the third and fourth embodiments solve the coincident problem of improving the position detection accuracy in the select assist device of a high-precision automatic transmission.
In the third and fourth embodiments, the sensitive sensor is provided in the position sensor 6 that detects the relative displacement amount, with one of the first rotating unit 13 and the second rotating unit 17 being the substrate side and the other being the brush side. It may be.
The shape and size of the select lever 11 are arbitrary, and may be a switch shape that can be operated with a fingertip.

    In the first embodiment, the position sensor 61 that detects the rotational displacement of the first rotating unit 13 and the position sensor 62 that detects the rotational displacement of the second rotating unit 17 are provided. The deviation between the operation position detected by the position sensor 61 and the operation position detected by the position sensor 62 is a relative displacement. In this case, the rotational displacement of the first rotating unit 13 and the second rotating unit 17 with respect to the fixed member is detected. On the other hand, with respect to one of the first rotating unit 13 and the second rotating unit 17, the other rotational displacement is detected, that is, the relative displacement between the first rotating unit 13 and the second rotating unit 17 is detected. A sensor 6 may be provided.

In the first to fourth embodiments, the idle coupling mechanism is shown as an example of the relative displacement allowable coupling mechanism. However, even if other than the idle coupling mechanism, for example, both couplings are allowed while allowing elastic displacement up to the limit elastic displacement amount. It may be an elastic coupling mechanism that couples with a member.
The elastic coupling mechanism will be described in detail. In the first embodiment, the midpoint from both ends of the play groove 131 to the protrusion 171 that engages with the play groove 131 of the first rotating portion 13 and is located in the play groove 131. The springs are provided on both sides so as to bias the protrusion 171 toward the position. The check mechanism unit 14 is not provided. Then, the spring is expanded and contracted by the protrusion 171 of the second rotating portion 17 that is positioned by rotating to the operating position via the control cable 4 by the detent force of the automatic transmission 5, and the first rotating portion 13, that is, the select lever is extended by the spring force. 11 position is determined. In the elastic coupling mechanism, an operation reaction force to the select lever 11 is generated by transmitting the detent on the automatic transmission side through the spring in this way. Similarly, the control is performed so that the midpoint position of the play groove, that is, the elastic displacement amount is set to 0, so that the operation of the automatic transmission 5 follows the operation of the select lever 11. This elastic coupling mechanism is also an example of a relative displacement allowable coupling mechanism.

In the first to fourth embodiments, as an example of the play coupling mechanism, a groove, a protrusion, and an assist actuator that allow a play amount are provided in the select unit. However, as shown in FIG. 22, the second rotating unit 17 and the assist actuator are provided. May be provided in the automatic transmission 5. Specifically, referring to FIG. 15, the control arm 51 of the automatic transmission 5 is connected to the second rotating portion 17, and the control arm 51 switches the range position by the rotation of the second rotating portion 17. To do. The second rotating portion 17 is provided with a worm wheel 16 to engage the worm 21 of the assist actuator 2. Therefore, the assist actuator 2 is provided on the automatic transmission 5 side. One end of the control cable 4 is attached to the protrusion 171 that moves in the play groove 131 of the first rotating portion 13 provided with the select lever 11, and the other end is attached to the second rotating portion 17. Such a configuration may be used.

Moreover, as an example of an idle connection mechanism, the example which provided the idle connection mechanism and the assist actuator in the middle of the control cable is shown in FIG. 23, FIG.
In this example, the idle coupling mechanism is formed by the connecting portion of the control cable 8a and the control cable 8b, and the relative displacement amount is detected by the position sensor 71. The control cable 8 b on the select lever 11 side is connected to the input lever 92 by the joint 91, and the control cable 8 e on the automatic transmission 5 side is connected to the output lever 95 by the joint 96. The input lever 92 and the output lever 95 are connected to an output shaft 94 that is the same rotation shaft. A worm wheel 93 is provided on the output shaft 94, and a worm 98 is provided on the output shaft of the electric motor 97 of the assist actuator to be engaged with the worm wheel 93. As described above, the play coupling mechanism and the assist actuator may be provided in the middle of the control cable, or the displacement amount may be directly detected at a portion where the relative position displacement amount is generated in the play coupling mechanism.

It is a side view which shows the structure of the automatic transmission of 1st Example. It is a principal part perspective view which shows the detailed structure of an actuator. It is a control block diagram of a controller. It is a perspective view which shows the structure of the detent of an automatic transmission. It is a flowchart which shows the basic flow of the process of range switching control performed with a control unit. It is a characteristic view which shows the operation reaction force which generate | occur | produces in a select lever in a P-> R range direction. It is explanatory drawing which shows the characteristic of the operating angle of a select lever, the operating angle of an actuator, and a relative position in operation to P-> R range. It is explanatory drawing which shows operation of a select lever, and operation | movement of an actuator. FIG. 3 is a cross-sectional view of two position sensors, a first rotating unit, and a second rotating unit of Example 1. It is explanatory drawing of the two position sensors in Example 1. FIG. It is a figure which shows the characteristic of the two position sensors in Example 1. FIG. It is a figure which shows the characteristic of a position sensor. It is a figure which shows the characteristic of a position sensor. It is sectional drawing of the two position sensors in Example 2, a 1st rotation part, and a 2nd rotation part. It is explanatory drawing of the two position sensors in Example 2. FIG. FIG. 10 is a control block diagram of a controller in Embodiment 3. It is explanatory drawing of the two position sensors in Example 3. FIG. It is a figure which shows the characteristic of the two position sensors in Example 3. FIG. 12 is a flowchart illustrating a flow of operation position switching processing executed by a controller according to the third embodiment. FIG. 10 is a control block diagram of a controller according to a fourth embodiment. 10 is a flowchart illustrating a flow of operation position / operation position switching processing executed by a controller according to the fourth embodiment. It is a figure which shows the other example of the selection assistance apparatus of the automatic transmission of an Example. It is a figure which shows the other example of the selection assistance apparatus of the automatic transmission of an Example. It is a figure which shows the link part of the other example of the selection assistance apparatus of the automatic transmission of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Select part 11 Select lever 12 Select knob 13 1st rotation part 131 Groove 14 Check mechanism part 141 Pin 142 Groove part 142a Valley part 16 Worm wheel 17 2nd rotation part 171 Protrusion 18 Cable mounting lever 19 Support axis 2 Assist actuator 21 Warm 3 Controller 31 Relative displacement calculator 32 Drive command value calculator 33 Motor drive controller 34 Relative displacement calculator 35 Operating position calculator 36 Operating speed calculator 37 Drive command value calculator 38 Integration controller 381 Integrator 382 Multiplier 39 Proportional Control Unit 391 Multiplier 40 Differential Control Unit 401 Multiplier 41 Adder 42 Subtractor 43 Operation Position Calculation Unit 44 Relative Displacement Calculation Unit 45 Relative Displacement Speed Calculation Unit 46 Drive Command Value Calculation Unit 47 Differential Control Unit 471 Multiplier 48 Adder 4 Control case Le 5 automatic transmission 51 control arm 52 rotates the shaft 53 the detent plate 53a cam nose 53b groove (valley)
54 Spring plate 55 Detent pin 56 Parking rod 57 Cam-shaped plate 58 Parking gear 6 Position sensor 61 Position sensor 611 Rotating body 612 Brush 613 Electrode 614 Resistor 62 Position sensor 621 Rotating body 622 Brush 623 Electrode 624 Resistor 63 Substrate 63a (Substrate) ) Front surface 63b (Substrate) back surface 63c Through holes 64a to 64e Connection portion 65 Casing 66 Position sensor 661 Resistor 662 Electrode 663 Brush 67 Position sensor 71 Position sensor 8a Control cable 8b Control cable 8e Control cable 91 Joint 92 Input lever 93 Worm wheel 94 Output shaft 95 Output lever 96 Joint 97 Electric motor 98 Worm

Claims (11)

The select lever and the automatic transmission select position switching device are connected by a select operation force transmission system, and the select operation force transmission system is provided with an assist actuator for assisting the select operation force by the driver. In the device
An operation position detecting means for detecting the operation position of the select lever is provided,
An operating position detecting means for detecting an operating position of the select position switching device is provided,
The operation position detection means and the operation position detection means are:
It is a potentiometer that changes the relative position where the resistor and the electrode contact, and detects the position by changing the resistance value of the resistor,
Each resistor of the potentiometer that detects the operation position and the potentiometer that detects the operation position is electrically connected at multiple points.
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 1,
The potentiometer that detects the operating position and the potentiometer that detects the operating position
Share the board,
Providing both resistors on one surface of the substrate, and electrically connecting the resistors in a ladder shape;
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 1,
The potentiometer that detects the operating position and the potentiometer that detects the operating position
Share the board,
A resistor is provided on each of the front and back of the substrate, and the resistor is electrically connected through a through hole penetrating the substrate.
A select assist device for an automatic transmission. In the automatic transmission select assist device according to any one of claims 1 to 3,
The electrical connection at multiple points of the potentiometer that detects the operating position and the resistor of the potentiometer that detects the operating position
Connected at the position corresponding to each range position of the automatic transmission,
A select assist device for an automatic transmission. The select lever and the automatic transmission select position switching device are connected by a select operation force transmission system, and the select operation force transmission system is provided with an assist actuator for assisting the select operation force by the driver. In the device
The select operating force transmission system is connected to a first connecting member connected to a select lever, a second connecting member connected to the select position switching device, and the connecting members are connected to each other while allowing relative displacement up to a limit amount. A relative displacement permissible coupling mechanism, and the assist actuator is set as the second coupling member,
Provide assist control means for controlling the drive of the assist actuator,
In the area where speed control is required, high-precision detection means for differentiation is provided.
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 5,
An operation position detecting means for detecting the operation position of the select lever is provided,
Providing a first operating position detecting means for detecting an operating position of the select position switching device;
A second operating position detecting means having a detection range narrower and higher sensitivity than the first operating position detecting means;
The assist control means includes
A drive command value is calculated from the operation position, the first operation position from the first operation position detection means, and the second operation position from the second operation position detection means, and at least in the calculation of the drive command value Using the second operating position for the differential operation;
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 5,
Providing a first operating position detecting means for detecting an operating position of the select position switching device;
A second operating position detecting means having a detection range narrower and higher sensitivity than the first operating position detecting means;
Providing a first operation position detecting means for detecting an operation position of the select lever;
A second operation position detecting means having a detection range narrower and higher sensitivity than the first operation position detecting means;
The assist control means includes
A first operating position from the first operating position detecting means; a second operating position from the second operating position detecting means; a first operating position from the first operating position detecting means; and the second operating position. A drive command value is calculated from the second operation position from the detection means, and at least the second operation position and the second operation position are used for differential calculation in the calculation of the drive command value.
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 7,
The assist control means includes
It is determined whether or not the operation position is within the detection range of the second operation position detection means, and the operation position is switched by switching the outside of the detection range of the second operation position detection means to the outside of the detection range of the first operation position detection means. Comprising an operation position calculating means for calculating
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 8,
The detection range of the second operation position detection means is an area where the change speed of the operation position is large.
A select assist device for an automatic transmission. In the automatic transmission select assist device according to any one of claims 6 to 9,
The assist control means includes
It is determined whether or not the operating position is within the detection range of the second operating position detecting means, and the operating position is switched by switching the outside of the detecting range of the second operating position detecting means to the detection range of the first operating position detecting means. An operating position calculating means for calculating,
A select assist device for an automatic transmission. In the automatic transmission select assist device according to claim 10,
The detection range of the second operating position detection means is a region where the change speed of the operating position is large.
A select assist device for an automatic transmission.

Images