JP6642035B2 - Transmission control device - Google Patents

Description

  The present invention relates to a transmission, and more particularly, to a control device for a mechanical automatic manual transmission that automatically switches a gear position of a manual transmission.

  Conventionally, as a device of this type, a predetermined actuator is driven by rotating an electric actuator in accordance with a select / shift operation of an operation lever and rotating a selected shift lever to shift a shift block integrally with a sleeve. 2. Description of the Related Art A mechanical automatic manual transmission that automatically shifts into a gear is known (for example, see Patent Document 1).

  In general, in a mechanical automatic manual transmission, the sleeve is shifted by the driving force of an actuator and pressed against a synchro ring, and the sleeve and the synchro ring are rotationally synchronized to engage the sleeve with a dog gear. The gear is brought into a predetermined gear.

  The synchro ring used in this way synchronizes rotation with the gear by friction caused by contact with the cone surface of the gear to be geared in, and is worn by friction. Therefore, when the wear amount of the synchro ring increases, it is necessary to replace the synchro ring.

  For example, a technique is known in which a synchronous position is recognized based on a change in the number of revolutions of a shift actuator, a change in the synchronous position is determined based on a neutral position, and a synchro ring is exchanged (for example, see Patent Document 2).

JP 2014-109310 A JP-T-2004-518092

  In order to shorten the shift operation time in the mechanical automatic manual transmission, it is preferable to move the sleeve at high speed.

  However, when the synchronous position is specified by the rotational speed of the shift actuator when the sleeve is moved at a high speed, the sleeve is moved with a strong force, so that the member connecting the shift actuator and the sleeve may bend or bend. Deformation or the like occurs, and the error between the synchro ring position obtained from the rotation speed of the shift actuator and the actual synchro ring position becomes large, so that the synchro ring position may not be grasped with high accuracy. As described above, if the synchro ring position cannot be grasped with high accuracy, the wear amount of the synchro ring grasped based on the synchro ring position cannot be grasped with high precision.

  An object of the disclosed device is to detect a synchro ring position with high accuracy and to be able to grasp a state of wear of the synchro ring with high accuracy.

  The disclosed device includes a shift control unit that shifts a sleeve by driving an actuator, and makes the sleeve contact a synchro ring to synchronize the rotation, thereby performing a shift control for gear-in to a predetermined gear. Shift movement amount detection means for detecting a shift movement amount of the sleeve; and a shift movement of the sleeve at a low speed by driving the actuator, and a change in a detection value of the shift movement amount detection means due to contact between the sleeve and the synchro ring. When the amount becomes equal to or less than a predetermined value, learning means for learning a detection value at that time as a synchro ring position, and the detection value at a predetermined reference time of the synchronization by the learning means is stored in a storage means as a reference time synchro ring position. A reference position storage control unit that performs The synchro-ring position learned after the quasi-time, the change-amount detecting means for detecting the amount of change between the reference-time synchro-ring position as an amount corresponding to the wear amount of the synchro-ring, and the detected A threshold determining unit that determines whether the amount of change exceeds a predetermined threshold; and a threshold that stores, in the storage unit, information indicating that the amount of change exceeds the threshold when it is determined that the amount of change exceeds the threshold. Excess storage control means.

  The learning means may shift the sleeve continuously at a low speed from the neutral position.

  In the apparatus of the above disclosure, the threshold includes a first threshold corresponding to a wear amount that is assumed to require immediate replacement of the synchro ring, and the threshold determination unit determines that the detected change amount is It is determined whether or not the first threshold value has been exceeded, and the threshold excess storage control means stores information indicating that the first threshold value has been exceeded in the storage means when it is determined that the first threshold value has been exceeded. And an exchange information output for outputting information indicating that the synchro ring needs to be exchanged in a manner recognizable by a driver when it is determined that the detected amount of change exceeds the first threshold value. Means may be further provided.

  In the apparatus of the above disclosure, the threshold includes a second threshold corresponding to a wear amount when the remaining amount becomes a predetermined amount until replacement of the synchro ring, and the threshold determination unit determines that the detected change amount is It is determined whether or not a second threshold value has been exceeded, and the threshold excess storage control means stores information indicating that the second threshold value has been exceeded in the storage means when determining that the second threshold value has been exceeded. You may do so.

  In the above disclosed device, the reference time point may be a time point immediately after starting use of the transmission or a time point immediately after replacing a synchro ring of the transmission with a new synchro ring.

  In the apparatus disclosed above, the shift movement amount detecting means may detect the shift movement amount of the sleeve by directly detecting a displacement of a member moved by the actuator.

  In the device disclosed above, the learning means may perform the learning by controlling a clutch device disposed between the engine and the transmission to a half-clutch state while the vehicle is stopped.

  According to the disclosed device, the position of the synchro ring can be grasped with high accuracy, and the information on the wear amount of the synchro ring can be grasped appropriately.

It is a figure showing the gear arrangement of the mechanical automatic manual transmission concerning one embodiment of the present invention. FIG. 2 is a schematic plan view showing a part of the shift device according to one embodiment of the present invention. It is a typical perspective view showing the shift device concerning one embodiment of the present invention. FIG. 2 is a schematic partial sectional view showing a shift actuator according to one embodiment of the present invention. FIG. 2 is a schematic partial cross-sectional view illustrating a synchronization mechanism according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a synchronous connection and a gear-in operation by the synchronization mechanism according to the embodiment of the present invention. 1 is a functional block diagram illustrating a transmission electronic control unit according to an embodiment of the present invention and related configurations. It is a flowchart of the learning process which concerns on one Embodiment of this invention. 5 is a flowchart of a wear amount determination process according to an embodiment of the present invention.

  Hereinafter, a mechanical automatic manual transmission according to an embodiment of the present invention will be described with reference to the accompanying drawings. The same components are denoted by the same reference numerals, and have the same names and functions. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a diagram illustrating an example of a gear arrangement of a mechanical automatic manual transmission according to the present embodiment. The mechanical automatic manual transmission includes an input shaft 10, an output shaft 11 arranged coaxially with the input shaft 10, and a counter shaft 12 arranged parallel to the input shaft 10 and the output shaft 11. . In FIG. 1, reference numeral 91 denotes an input rotation speed sensor that detects the rotation speed of the input shaft 10, and reference numeral 92 denotes an output rotation speed sensor that detects the rotation speed of the output shaft 11.

  An input main gear 13 is provided on the input shaft 10 so as to be integrally rotatable. The output shaft 11 is provided with a fourth-speed main gear M4, a third-speed main gear M3, a second-speed main gear M2, a first-speed main gear M1, a reverse main gear RM, and a sixth-speed main gear M6 in this order from the input side. The fourth-speed main gear M4, the third-speed main gear M3, the second-speed main gear M2, the first-speed main gear M1, and the reverse main gear MR are rotatably provided on the output shaft 11, and the sixth-speed main gear M6 is integrally rotatable with the output shaft 11. Is provided.

  The counter shaft 12 has, in order from the input side, an input counter gear 14 meshing with the input main gear 13, a fourth speed counter gear C4 meshing with the fourth speed main gear M4, a third speed counter gear C3 meshing with the third speed main gear M3, and a second speed gear. A second-speed counter gear C2 meshing with the main gear M2, a first-speed counter gear C1 meshing with the first-speed main gear M1, a reverse counter gear CR meshing with the reverse main gear MR via the idler gear 15, and a six-speed counter meshing with the sixth-speed main gear M6. A gear C6 is provided. The input counter gear 14, the fourth speed counter gear C4, the third speed counter gear C3, the second speed counter gear C2, the first speed counter gear C1, and the reverse counter gear CR are provided on the counter shaft 12 so as to be integrally rotatable. The gear C6 is provided on the count shaft 12 so as to be relatively rotatable.

  The first synchronizing mechanism 20 includes a first hub 21 fixed to the output shaft 11, an input dog gear 22 fixed to the input main gear 13, a fourth speed dog gear 23 fixed to the fourth speed main gear M4, and a first hub. A first sleeve 24 non-rotatably and axially movably attached to the motor 21 and a pair of sync rings (block rings) SR interposed between the first sleeve 24 and the dog gears 22 and 23, respectively. Have. A first shift fork F1 that moves the first sleeve 24 in the axial direction is engaged with the outer peripheral groove of the first sleeve 24.

  When the first sleeve 24 moves in the direction of arrow A in the figure and meshes with the input dog gear 22 via a spline, the power transmission path is directly connected from the input shaft 10 to the output shaft 11, and the output shaft 11 rotates at the fifth speed. When the first sleeve 24 moves in the direction of arrow B in the figure and meshes with the fourth-speed dog gear 24, the power transmission path becomes the input main gear 13, the input counter gear 14, the fourth-speed counter gear C4, the fourth-speed main gear M4, and the output shaft. 11 rotates at a speed equivalent to the fourth speed.

  The second synchronization mechanism 30 includes a second hub 31 fixed to the output shaft 11, a third speed dog gear 32 fixed to the third speed main gear M3, a second speed dog gear 33 fixed to the second speed main gear M2, A second sleeve 34 is attached to the hub 31 so as to be non-rotatable and movable in the axial direction, and a pair of synchro rings SR interposed between the second sleeve 34 and the dog gears 32 and 33, respectively. . A second shift fork F2 that moves the second sleeve 34 in the axial direction is engaged with the outer circumferential groove of the second sleeve 34.

  When the second sleeve 34 moves in the direction of arrow A in the figure and meshes with the third speed dog gear 32 via a spline, the power transmission path is the input main gear 13, the input counter gear 14, the third speed counter gear C3, the third speed main gear M3, and the output shaft. 11 rotates at a speed equivalent to the third speed. When the second sleeve 34 moves in the direction of arrow B in the figure and meshes with the second-speed dog gear 33 via a spline, the power transmission path becomes the input main gear 13, the input counter gear 14, the second-speed counter gear C2, the second-speed main gear M2, and the output shaft. 11 rotates at the second gear.

  The third synchronization mechanism 40 includes a third hub 41 fixed to the output shaft 11, a first speed dog gear 42 fixed to the first speed main gear M1, a reverse dog gear 43 fixed to the reverse main gear MR, and a third hub. A third sleeve 44 is attached to the first sleeve 41 so as to be non-rotatable and movable in the axial direction, and a pair of synchro rings SR interposed between the third sleeve 44 and the dog gears 42 and 43, respectively. A third shift fork F3 that moves the third sleeve 44 in the axial direction is engaged with the outer peripheral groove of the third sleeve 44.

  When the third sleeve 44 moves in the direction of arrow A in the figure and meshes with the first-speed dog gear 42, the power transmission path is the input main gear 13, the input counter gear 14, the first-speed counter gear C1, the first-speed main gear M1, and the output shaft. 11 rotates at the first speed. When the third sleeve 44 moves in the direction of arrow B in the figure and meshes with the reverse dog gear 44, the power transmission path becomes the input main gear 13, the input counter gear 14, the reverse counter gear CR, the idler gear 15, the reverse main gear MR, and the output power. The shaft 11 rotates in the reverse direction.

  The fourth synchronizing mechanism 50 is attached to the fourth hub 51 fixed to the counter shaft 12, a sixth speed dog gear 52 fixed to the sixth speed counter gear C6, and to the fourth hub 51 so as to be non-rotatable and movable in the axial direction. And a synchro ring SR interposed between the fourth sleeve 54 and the sixth-speed dog gear 52. A fourth shift fork F4 that moves the fourth sleeve 54 in the axial direction is engaged with the outer peripheral groove of the fourth sleeve 54.

  When the fourth sleeve 54 moves in the direction of arrow A in the figure and meshes with the sixth-speed dog gear 52 through splines, the power transmission paths are the input main gear 13, the input counter gear 14, the sixth-speed counter gear C6, and the sixth-speed main gear M6, and the output shaft 11 rotates at 6th gear.

  Next, a detailed configuration of the shift device 60 of the present embodiment will be described with reference to FIGS.

  As shown in FIG. 2, the shift device 60 includes a first shift shaft 61A and a second shift shaft 61B extending parallel to each other.

  A first shift block 62 is connected to one end of the first shift shaft 61A for selectively switching the shift speed to first speed or reverse. A third shift fork F3 is fixed to the other end of the first shift shaft 61A. A second shift fork F2 is provided between the first shift block 62 of the first shift shaft 61A and the third shift fork F3 so as to be movable in the axial direction. The second shift fork F2 is connected to a third shift block 64 for selectively switching the gear position to the third speed or the second speed.

  A first shift fork F1 is provided at one end of the second shift shaft 61B so as to be movable in the axial direction. The first shift fork F1 is connected to a second shift block 63 for selectively switching the shift speed to the fifth speed or the fourth speed. A fourth shift fork F4 is fixed to the rear end side of the second shift shaft 61B. A fourth shift block 65 for switching the shift speed to the sixth speed is connected between the first shift fork F1 and the fourth shift fork F4 of the second shift shaft 61B.

  As shown in FIG. 3, the first shift lever 66 and the second shift lever 67 are bent in a substantially L-shape, and are rotatably supported by a support shaft 70. One end of the first shift lever 66 is engaged with a recess of the first shift block 62, and one end of the second shift lever 67 is engaged with a recess of the second shift block 63.

  The third shift lever 68 and the fourth shift lever 69 are formed to be bent in a substantially L-shape, and are rotatably supported by the support shaft 71. One end of the third shift lever 68 is engaged with a recess of the third shift block 64, and one end of the fourth shift lever 69 is engaged with a recess of the fourth shift block 65.

  These first to fourth shift levers 66 to 69 are rotated around the support shafts 70 and 71 by the actuators 72 to 75 in response to the operation of the operation lever 90 provided in the driver's cab. The blocks 62 to 65 are shifted.

  The first and second shift levers 66 and 67 are selected by the first select actuator 72 and are rotated by the first shift actuator 73. The third and fourth shift levers 68 and 69 are selected by the second select actuator 74 and rotated by the second shift actuator 75.

  The first and second select actuators 72 and 74 include select motors 72A and 74A, and cylindrical bodies 72D and 74D provided with select gears 72C and 74C that mesh with the motor gears 72B and 74B of the select motors 72A and 74A. Have. When the cylinders 72D, 74D are rotated by the drive of the selection motors 72A, 74A, the outer peripheral surfaces of the cylinders 72D, 74D are selectively engaged with the other ends of the shift levers 66 to 69. A pair of protrusions 74E (the protrusions of the cylindrical body 72D are not shown) are provided.

  The first and second shift actuators 73 and 75 include shift motors 73A and 75A, and ball screws 73B and 75B connected to rotating shafts of the shift motors 73A and 75A. The first and second shift actuators 73 and 75 directly detect the relative movement amounts (hereinafter referred to as shift stroke amounts) of the cylinders 72D and 74D with respect to the ball screws 73B and 75B. A shift stroke sensor 93 (only shown in FIG. 4) for directly measuring the movement is provided. As a means for detecting the stroke amount, a sensor for indirectly detecting the stroke amount, such as a rotation angle sensor (not shown) built in the shift motors 73A and 75A, may be used. Here, in the case where the shift stroke amount is directly detected, a factor that causes an error is reduced as compared with the case where the shift stroke amount is indirectly detected based on the rotation angle of the shift motor or the like. The stroke amount can be detected.

  Each of the ball screws 73B and 75B is screwed with a nut 73C (shown only in FIG. 4) inserted into the cylindrical bodies 72D and 74D, and both ends thereof are supported by interlock plates 73D and 75D. The interlock plates 73D and 75D are provided with guide grooves 75E (the guide grooves of the interlock plates 73D are not shown) for accommodating the protrusions 74E of the cylinders 72D and 74D so as to be slidable in the shift direction.

  When the ball screws 73B and 75B are rotated by driving the shift motors 73A and 75A, the shift levers 66 to 69 are rotated. Thus, the shift blocks 62 to 65 are moved in the shift direction, and a gear-in operation from a neutral position to a predetermined position or a gear-removal operation from a predetermined position to the neutral position is performed.

  Next, an example of the synchronous connection from the neutral position to the fourth speed and the gear-in operation will be described. The same applies to the synchronous coupling and gear-in operation to other shift speeds and reverses, and therefore, detailed description is omitted.

  When the operating lever 90 is operated from the neutral position to the fourth speed select position, the select motor 72A is driven, and the second shift lever 67 is selected. Further, when the operation lever 90 is operated to the fourth gear shift position, the shift motor 73A is driven, and the second shift block 63 is integrally moved with the first shift fork F1 in the shift direction with the rotation of the ball screw 73B. Start moving. That is, as shown in FIG. 5, the first sleeve 24 engaged with the first shift fork F1 starts moving from the neutral position toward the fourth speed dog gear 23. In FIG. 5, reference numeral 24G denotes spline teeth of the first sleeve 24, reference numeral SG denotes synchro teeth of the synchro ring SR, and reference numeral 23G denotes dog teeth of the fourth-speed dog gear 23.

  As shown in FIG. 6A, when the spline teeth 24G come into contact with the synchro teeth SG of the synchro ring SR due to the shift movement of the first sleeve 24, a synchronous load is generated on the synchro ring SR (hereinafter, the respective sleeves 24, 34, The time when the sync rings 44 and 54 come into contact with the synchro ring SR is called synchronization start). As described above, when the state where the synchronous load is generated in the synchro ring SR is maintained, as a result, the rotations of the first sleeve 24 and the fourth speed dog gear 23 are synchronized (hereinafter, the respective sleeves 24, 34, 44, 54). The point in time at which the rotation of the transmission gear and the transmission gear (the dog gear of the transmission gear) are synchronized is referred to as synchronization termination.)

  When the rotation of the first sleeve 24 and the rotation of the fourth speed dog gear 23 are synchronized, as shown in FIG. 6B, the spline teeth 24G push the synchro teeth SG to move the first sleeve 24 in the shift direction. To resume movement.

  Thereafter, as shown in FIG. 6C, the spline teeth 24G and the dog teeth 23G start meshing, and as shown in FIG. 6D, the spline teeth 24G and the dog teeth 23G are completely meshed. Thus, the gear-in operation of the fourth speed is completed.

  The transmission ECU 100 is a so-called electronic control unit, and includes a CPU, a ROM, a RAM, an input port, an output port, and the like.

  FIG. 7 is a functional block diagram showing a transmission ECU 100 according to an embodiment of the present invention and a related configuration.

  The transmission ECU 100 includes a select motor control unit 101, a shift motor control unit (shift control unit) 102, a synchro ring position learning unit (learning unit and reference position storage control unit) 103, and a memory (storage unit) 104. And a wear amount determination unit (a change amount detection unit, a threshold determination unit, a threshold excess storage control unit, and an exchange information output unit) 105 as some functional elements. In the present embodiment, each of these functional elements is described as being included in the transmission ECU 100, which is an integral piece of hardware. However, any one of them may be provided in separate hardware.

  The memory 104 can store various information for a long time. The information stored in the memory 104 can be obtained by a vehicle maintenance terminal (not shown) connected to the transmission ECU 100.

  The selection motor control unit 101 sequentially obtains the position of the operation lever 90 from the shift position sensor 95, and when a selection operation is performed, the selection motors 72A and 74A according to the position of the operation lever 90. Is driven so that a shift lever (any of the shift levers 67 to 69) used for shifting to a shift position in which shift operation can be performed at that position is rotatable.

  The shift motor control unit 102 sequentially obtains the position of the operation lever 90 from the shift position sensor 95. When a shift operation is performed by the operation lever 90, the shift motor control unit 102 drives the shift motors 73A and 75A. Then, the following shift control is performed in which the shift lever (one of the shift levers 67 to 69) corresponding to the shift speed to be shifted is rotated.

  More specifically, immediately after the shift operation is performed, the shift motor control unit 102 supplies a predetermined amount of current for shifting the sleeves (24, 34, 44, 54) at a relatively high speed. 73A and 75A.

  Further, when the distance between the sleeve (24, 34, 44, 54) and the synchro ring SR approaches a predetermined value or less, the shift motor control unit 102 determines that the position is immediately before the start of synchronization and reduces the supply current amount. As a result, the moving speed of the sleeve (24, 34, 44, 54) is reduced immediately before the synchro ring SR, and generation of abnormal noise when the sleeve (24, 34, 44, 54) contacts the synchro ring SR, An impact on the synchro ring SR can be effectively suppressed. Whether the sleeve (24, 34, 44, 54) is at the position immediately before the start of synchronization depends on the current shift stroke detected by the shift stroke sensor 93 and the synchro ring obtained by the synchro ring position learning unit 103 described later. The determination is made based on the difference from the position.

  Further, at the start of synchronization after the sensor value of the shift stroke sensor 93 reaches the synchro ring position, the shift motor control unit 102 increases the amount of current supplied to the shift motors 73A and 75A again. As a result, the synchro ring SR and the sleeve (24, 34, 44, 54) that have caused the differential rotation are synchronized by the synchronous load. Thereafter, the sleeves (24, 34, 44, 54) resume the shift movement, and push the synchro ring SR to completely mesh with the dog gear, whereby the shift control ends.

  The synchro ring position learning unit 103 learns a synchronization start position (synchro ring position) where each of the sleeves (24, 34, 44, 54) shifts and contacts the synchro ring SR.

  Specifically, the synchro ring position learning unit 103 controls a clutch device (not shown) to a half-clutch state so that power required for learning is transmitted from the engine (not shown) to the input shaft 10 when the vehicle stops.

  Further, the synchro ring position learning unit 103 supplies a predetermined amount of low current for moving the sleeves (24, 34, 44, 54) from the neutral position in the shift direction at a low speed to the shift motors (73A, 75A). In this case, the amount of current is set to a value lower than the amount of current supplied when the sleeve (24, 34, 44, 54) is moved at high speed from the neutral position to the position immediately before the start of synchronization during normal shift control. It is preferable that the amount of current to be supplied is an amount of current that moves the sleeve (24, 34, 44, 54) at a substantially constant speed from the neutral position until it comes into contact with the synchro ring SR. When learning the synchro ring position for the same synchro ring SR, it is preferable to set the same current value in each learning.

  Further, the synchro ring position learning unit 103 determines that the amount of change per unit time of the shift stroke detected by the shift stroke sensor 93 is equal to or less than a predetermined threshold value when the sleeve (24, 34, 44, 54) abuts on the synchro ring SR. , The sensor value (shift stroke) at this time is learned as the synchro ring position. The learned synchro ring position is stored in the memory 104 of the transmission ECU 100. Note that the synchro ring position learning unit 103 sets a reference synchro ring position (a reference synchro ring position) at a predetermined reference time point (for example, a time point immediately after the vehicle is completed or a time point immediately after the synchro ring is replaced with a new synchro ring). When the learning instruction of the position is received, the learned synchro ring position is stored in the memory 104 as the reference synchro ring position.

  The wear amount determination unit 105 calculates the amount of change between the reference synchro ring position stored in the memory 104 and the most recent learned synchro ring position. Here, the change amount indicates an amount corresponding to the wear amount from the reference time of the synchro ring SR at the time of learning. In the present embodiment, the actual amount of wear of the synchro ring SR is determined by moving the portions (in the present embodiment, the cylinders 72D and 74D) measuring the synchro ring position by this amount of change. , The amount by which the sleeve is moved.

  Further, the wear amount determination unit 105 determines whether the change amount exceeds a predetermined threshold. In the present embodiment, the threshold value is a first threshold value corresponding to the wear amount (replacement-required wear amount) in which the replacement of the synchro ring SR is required immediately and a little more until the replacement is required (for example, up to the replacement-required wear amount). (The remainder is equal to or less than a predetermined amount).

  When the change amount exceeds the first threshold value, the wear amount determination unit 105 outputs information indicating that the change amount exceeds the first threshold value to the memory 104, and promptly replaces the synchro ring SR. (For example, a mark, a character, etc.) for causing the driver to recognize that it is necessary for the driver, is output to the meter section 110 which displays meters and the like provided in the driver's seat (not shown). Thereby, the driver can appropriately recognize that the replacement of the synchro ring SR is required immediately. For information indicating that the amount of change stored in the memory 104 exceeds the first threshold, the vehicle maintenance terminal is obtained from the memory 104 by connecting the vehicle maintenance terminal to the transmission ECU 100. The information can be displayed on the display unit of the vehicle maintenance terminal. As a result, the vehicle mechanic can use the vehicle maintenance terminal to know that the change amount exceeds the first threshold, and the vehicle mechanic prompts the driver to replace the synchro ring SR. It is possible to appropriately notify that it is necessary.

  When the amount of change exceeds the second threshold, the wear amount determination unit 105 outputs information indicating that the amount of change exceeds the second threshold to the memory 104. For information indicating that the amount of change stored in the memory 104 exceeds the second threshold, the vehicle maintenance terminal is connected to the transmission ECU 100 so that the vehicle maintenance terminal On the display unit of the terminal. Thereby, at the time of vehicle maintenance such as vehicle inspection, the vehicle mechanic can use the vehicle maintenance terminal to grasp that the amount of change exceeds the second threshold, and the vehicle mechanic notifies the driver. On the other hand, it is possible to appropriately notify that the exchange of the synchro ring SR is near.

  Next, a control flow of the learning process according to the present embodiment will be described with reference to FIG.

  In step S100, it is determined whether or not the vehicle is stopped (for example, stopped in an idling state) based on various sensor values such as an engine speed sensor, an accelerator opening sensor, and a vehicle speed sensor, all of which are not shown. If the vehicle is stopped (Yes), the process proceeds to step S110.

  In step S110, a clutch device (not shown) is controlled to a half-clutch state so that a differential rotation required for learning is generated by power transmission from the engine to the input shaft 10.

  In step S120, the sleeve (24, 34, 44, 54) is moved at a low speed in the shift direction from the neutral position toward the synchro ring SR.

  In step S130, it is determined whether or not the shift amount per unit time of the shift stroke detected by the shift stroke sensor 93 is equal to or less than a predetermined threshold. If the change amount is equal to or less than the threshold value (Yes), the shift stroke (sensor value) at this time is learned as the synchro ring position. That is, in step S140, a learning correction is executed in which the previous learning value stored in the memory (not shown) of transmission ECU 100 is rewritten to the new synchro ring position learned this time.

  Then, in step S150, the supply current to the shift motors (73A, 75A) is reversed to return the sleeves (24, 34, 44, 54) to the neutral position.

  In step S160, the wear amount determination unit 105 executes a wear amount determination process (see FIG. 9) for determining the wear amount of the synchro ring (SR) using the synchro ring position learned in step S140, and the learning process is performed. Is terminated.

  Next, a control flow of the wear amount determination processing according to the present embodiment will be described with reference to FIG. The wear amount determination processing corresponds to the processing of step S160 in FIG.

  The wear amount determination unit 105 calculates the amount of change between the reference synchro ring position stored in the memory 104 and the most recent learned synchro ring position (step S200). Note that the reference synchro ring position is stored in the memory 104 at the predetermined reference time point by executing the same processing as in steps S110 to S140 in accordance with an instruction from the vehicle manufacturer or vehicle mechanic.

  Next, the wear amount determination unit 105 determines whether the change amount exceeds the second threshold (Step S201). If the amount of change does not exceed the second threshold (NO), it means that the amount of wear of the synchro ring is still small, and the wear amount determination processing ends.

  On the other hand, if the change amount exceeds the second threshold value (YES), it means that the wear amount of the synchro ring is a little more cautionary wear amount until the synchro ring is replaced. The wear amount determination unit 105 outputs information indicating that the change amount exceeds the second threshold value to the memory 104 (Step S202).

  Next, the wear amount determination unit 105 determines whether or not the amount of change exceeds the first threshold (Step S203). As a result, if the amount of change does not exceed the first threshold (NO), it means that the amount of wear of the synchro ring does not exceed the amount that should be replaced immediately (replacement required amount of wear). The wear amount determination processing ends.

  On the other hand, if the amount of change exceeds the first threshold (YES), it means that the amount of wear of the synchro ring exceeds the amount of wear required for replacement, which should be replaced immediately. 105 outputs information indicating that the change amount exceeds the first threshold value to the memory 104 (step S204), and information for causing the driver to recognize that the exchange of the synchro ring is urgently needed (step S204). For example, a mark, a character, or the like) is displayed on the meter unit 110 (step S205), and the process ends.

  As described above in detail, in the present embodiment, while the vehicle is stopped, the sleeves (24, 34, 44, 54) are moved at a low speed from the neutral position to the synchronization start position, and the amount of change in the sensor value of the shift stroke sensor 93 is set to a predetermined value. When the sensor value becomes equal to or less than the threshold value, the sensor value at this time is learned as the synchro ring position. That is, by moving the sleeves (24, 34, 44, 54) at low speed and making gentle contact with the synchro ring SR, it is possible to effectively secure the time for learning, and to effectively reduce the influence of impact and disturbance due to contact. The learning accuracy of the synchro ring position can be reliably improved.

  Further, by accurately grasping the position immediately before the start of synchronization and the start position of synchronization based on the learned synchro ring position, the shift controllability is reliably improved, and the shift operation time can be effectively reduced.

  In the present embodiment, the amount of change from the reference synchro ring position, that is, the amount (index) corresponding to the amount of wear of the synchro ring from the reference time point, is calculated using the synchro ring position learned with high accuracy. Therefore, a highly accurate index indicating the amount of wear of the synchro ring can be obtained. Therefore, the state of the wear amount of the synchro ring can be appropriately determined, and the result of the determination can be appropriately grasped by the vehicle mechanic, the driver, and the like.

  It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  For example, the learning of the synchro ring position is not limited to when the vehicle is stopped, and may be performed in parallel with the normal shift control. In this case, the shift movement speed of the sleeve (24, 34, 44, 54) is controlled at a high speed from the neutral position to the position immediately before the start of synchronization, and is controlled at a low speed from the position immediately before the start of synchronization to the start position of the synchronization. You just have to learn. As described above, if learning is performed during normal shift control, the execution frequency of learning can be effectively secured.

  In the above embodiment, the electric motor is used as the actuator for moving the sleeve. However, the present invention is not limited to this, and may be an actuator using hydraulic pressure.

  In the above-described embodiment, the wear amount determination process is performed during the learning process. However, the present invention is not limited to this. For example, the wear amount determination process may be performed at a time irrelevant to the learning process. Alternatively, for example, the wear amount determination processing may be performed periodically (for example, every other month).

  In the above embodiment, the two-stage threshold is used as the threshold for determining the state of the amount of wear of the synchro ring. However, the present invention is not limited to this, and a one-stage threshold may be used. Alternatively, three or more threshold values may be used.

DESCRIPTION OF SYMBOLS 10 Input shaft 11 Output shaft 12 Counter shaft 13 Input main gear 22 Input dog gear 23 Four-speed dog gear 24,34,44,54 Sleeve 32 Third-speed dog gear 33 Second-speed dog gear 42 First-speed dog gear 43 Reverse dog gear 52 Six-speed dog gear 72, 74 Select actuator 73, 75 Shift actuator 72A, 74A Select motor 73A, 75A Shift motor 91 Input speed sensor 92 Output speed sensor 93 Shift stroke sensor 95 Shift position sensor 100 Transmission ECU
101 select motor control unit 102 shift motor control unit 103 synchro ring position learning unit 104 memory 105 wear amount determination unit M1 first speed main gear M2 second speed main gear M3 third speed main gear M4 fourth speed main gear M5 fifth speed main gear M6 sixth speed main gear C6 6-speed counter gear SR synchro ring

Claims (7)

A shift control unit that shifts the sleeve by driving the actuator, shifts the sleeve into contact with a synchro ring and synchronizes the rotation, thereby performing a shift control for gear-in to a predetermined shift speed;
Shift movement amount detection means for detecting a shift movement amount of the sleeve,
The sleeve is shifted at a low speed by driving the actuator, and when the amount of change in the detected value of the shift amount detecting means becomes less than a predetermined value due to contact between the sleeve and the synchro ring, the detected value at that time is synchronized. Learning means for learning as a position,
Reference position storage control means for storing the detected value at a predetermined reference time of the synchronization by the learning means in a storage means as a reference time synchronization position,
The synchro ring position learned after the reference time by the learning means, and a change amount detecting means for detecting a change amount of the reference time synchro ring position as an amount corresponding to the wear amount of the synchro ring,
Threshold determination means for determining whether the detected change amount exceeds a predetermined threshold,
A control device for a transmission, comprising: a threshold excess storage control unit that stores, in the storage unit, information indicating that the change amount has exceeded the threshold when it is determined that the threshold has been exceeded. 2. The transmission control device according to claim 1, wherein the learning unit continuously shifts the sleeve from the neutral position at a low speed. 3. The threshold includes a first threshold corresponding to the amount of wear that is assumed to require immediate replacement of the synchro ring,
The threshold value determination means determines whether the detected amount of change exceeds the first threshold value,
The threshold excess storage control means, when determining that the first threshold has been exceeded, stores information indicating that the first threshold has been exceeded in the storage means,
When it is determined that the detected amount of change exceeds the first threshold, an exchange information output unit that outputs information indicating that the synchro ring needs to be exchanged in a manner recognizable by a driver, The transmission control device according to claim 1, further comprising: The threshold includes a second threshold corresponding to the amount of wear when the remaining amount reaches a predetermined amount until the synchro ring is replaced,
The threshold value determining means determines whether the detected change amount exceeds the second threshold value,
4. The storage device according to claim 1, wherein the threshold-excess storage control unit stores information indicating that the second threshold has been exceeded in the storage unit when determining that the second threshold has been exceeded. 5. 2. The control device for a transmission according to claim 1. The method according to any one of claims 1 to 4, wherein the reference time is a time immediately after the use of the transmission is started or a time immediately after the synchro ring of the transmission is replaced with a new synchro ring. Transmission control device. The said shift movement amount detection means detects the shift movement amount of the said sleeve by detecting directly the displacement of the member moved by the said actuator, The Claim 1 any one of Claims 1-5. Transmission control device. 7. The learning unit according to claim 1, wherein the learning unit performs the learning by controlling a clutch device disposed between the engine and the transmission to a half-clutch state while the vehicle is stopped. 8. Transmission control device.

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