JP2018155281A - Control device of stepped automatic gear change device, vehicle and control method of stepped automatic gear change device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of a stepped automatic gear change device which can suppress the occurrence of shift-busy in the slope traveling or the like of a vehicle which is mounted with a stepped automatic gear change device, and can make good use of a drive intention to shift-up by taking into consideration the drive intention of a driver at an acceleration operation, the vehicle and a control method of the stepped automatic gear change device.SOLUTION: In a control method of a stepped automatic transmission, when there occurs accelerator-off, even if a detection vehicle speed Vm and a detection accelerator opening αm exceed a shift-up line, control for suppressing shift-up is performed until one of cases that a period within a range in which a change of the detection accelerator opening αm is preset elapses for a preset first time t1, or that the detection vehicle speed Vm is increased at preset acceleration or higher, or that an engine rotation number Nem is increased to a preset rotation number or larger, or that the detection vehicle speed Vm and the detection accelerator opening αm exceed the shift-up line which has exceeded immediately before once again is established.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a control device for a stepped automatic transmission that can suppress the occurrence of shift busy in a stepped automatic transmission, a vehicle, and a control method for a stepped automatic transmission.

  A vehicle equipped with an internal combustion engine such as a diesel engine often uses a stepped automatic transmission that switches gears, such as an automatic transmission or an automated manual transmission (AMT) that automates a shift operation.

  This stepped automatic transmission has a shift map (vertical axis: accelerator, horizontal axis: vehicle speed) that determines the timing of switching the gear stage based on the vehicle speed and the accelerator opening. However, on the basis of this shift map, if the response is emphasized and the gear is shifted in response to the driver's accelerator operation immediately, depending on the road conditions, the speed may change excessively, and on the contrary, the running performance may deteriorate. . For example, when traveling uphill on a corner (curve), there may be a shift busy in which a shift operation for shifting down occurs immediately after shifting up, making it difficult to travel.

  In this connection, in the case of a continuously variable transmission (CVT), cornering was detected while trying to escape from a quick corner at the corner exit of the vehicle and not give the driver a sense of incongruity. In this case, when the driver accelerates by switching the accelerator pedal from off to on, there has been proposed a vehicle shift control device that prohibits upshifting until the vehicle is in a substantially low speed state (see, for example, Patent Document 1). ).

  In addition, when it is detected that the accelerator opening is decreasing, the shift operation to shift up to the target shift stage is prohibited and preset from the steering angle sensor so that the vehicle can smoothly run on the curve. When the increment of the calculated vehicle steering angle within a predetermined time is less than a threshold value, there is proposed an automatic transmission control method for canceling prohibition of a shift operation for shifting up to a target shift stage. (For example, refer to Patent Document 2).

JP 2008-128101 A JP, 2006-188604, A

  However, in addition to this cornering, for example, even if you are driving on a curved uphill, if you depress the accelerator and then depress the accelerator, you will exceed the upshift line in the shift map. After shifting up, the vehicle speed may decrease and shift down. In such a case, shift busy, which is a state where the gear stage is repeatedly changed, occurs.

  Therefore, it is important to suppress the occurrence of this shift busy, while the accelerator depression state (accelerator opening) represents the driver's intention to drive. It is necessary to respect the will and use it for the shift up.

  The present invention has been made in view of the above, and the object thereof is to eliminate the need to detect corner traveling and the steering angle in uphill traveling of a vehicle equipped with a stepped automatic transmission. A control device for a stepped automatic transmission, a vehicle, and a control method for a stepped automatic transmission, which can suppress the occurrence of shift busy and respect the driver's willingness to operate the accelerator in shifting up, Is to provide.

  In order to achieve the above object, a control device for a stepped automatic transmission according to the present invention is data used for performing an operation of switching a gear to a target shift with a stepped automatic transmission, and a vehicle Based on the shift map data indicating the upshift line and the downshift line based on the vehicle speed and the accelerator opening, from the detected vehicle speed detected by the vehicle speed detection device and the detected accelerator opening detected by the accelerator opening sensor, In the control device for a stepped automatic transmission that determines whether or not to switch the gear stage to the target gear stage and automatically performs a shift operation, the detected accelerator opening degree detected by the accelerator opening degree detecting device is If the detected vehicle speed and the detected accelerator opening exceed the shift-up line in the shift map data, the change in the detected accelerator opening is previously set. Detected when a preset first time has elapsed, or when the detected vehicle speed is increased and the vehicle is accelerating at or above a preset acceleration, or detected by an engine speed sensor Either the upshift permission condition is met when the engine speed increased more than the preset speed, or when the detected vehicle speed and the detected accelerator opening exceed the shift-up line that has been exceeded immediately before. Until this is done, it is configured to include a shift-up suppression function that performs control to suppress gear-up shift-up.

  In order to achieve the above object, a vehicle according to the present invention includes the control device for the stepped automatic transmission described above.

  Further, the stepped automatic transmission control method of the present invention for achieving the above object is data used for performing an operation of switching the gear stage to the target gear stage in the stepped automatic transmission, and Using the shift map data indicating the up-shift line and the down-shift line based on the vehicle speed and the accelerator opening of the vehicle, the detected vehicle speed detected by the vehicle speed detecting device and the detected accelerator opening detected by the accelerator opening sensor From the control method of the stepped automatic transmission that determines whether or not to change the gear stage to the target gear stage and automatically performs the shifting operation, after the accelerator is stepped on and the accelerator opening is increased, When the accelerator depression amount decreases and the accelerator opening becomes smaller, even if the detected vehicle speed and the detected accelerator opening exceed the shift-up line, the change in the detected accelerator opening is within the preset range. When a certain period of time passes a preset first time, or when the detected vehicle speed increases and the vehicle is accelerated at or above a preset acceleration, or the engine speed detected by the engine speed sensor is Shift until the increase in the preset number of rotations or until either of the detected vehicle speed and the detected accelerator opening exceeds the shift-up line that has just exceeded the previous shift-up permission condition is satisfied. This is a method of performing control to suppress up.

  According to the control device of the stepped automatic transmission, the vehicle, and the control method of the stepped automatic transmission of the present invention, it is not necessary to detect the corner traveling or the steering angle in the uphill traveling of the vehicle, The occurrence of shift busy in the stepped automatic transmission can be suppressed, and the driving intention of the driver detected in the state of the accelerator operation can be respected and used for the shift up.

It is a figure which shows typically the structure of the stepped automatic transmission which the control apparatus of the stepped automatic transmission of embodiment which concerns on this invention controls. It is a figure which shows an example of the control flow of the control method of the stepped automatic transmission of embodiment which concerns on this invention. It is a figure which shows the mode of gear shift at the time of suppressing a shift up with a shift map. It is a figure which shows the mode of gear shift in case a accelerator is kept stepping on and does not suppress upshifting with a shift map. It is a figure which shows the mode of gear shift when the 1st condition of the upshift permission condition is satisfy | filled after accelerator removal with a shift map. It is a figure which shows the mode of gear shift when the 2nd condition of the upshift permission condition is satisfy | filled after accelerator removal with a shift map. It is a figure which shows the mode of gear shift when the 3rd condition of the upshift permission condition is satisfy | filled after accelerator removal with a shift map. It is a figure which shows the mode of shifting in case a shift-up is not suppressed by a shift map.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a control device for a stepped automatic transmission, a vehicle, and a control method for a stepped automatic transmission according to an embodiment of the present invention will be described with reference to the drawings. Here, as the stepped automatic transmission, an automated manual transmission (AMT) connected to a diesel engine will be described as an example. However, the present invention is not limited to this, and other internal combustion engines, and all other It can also be applied to an automatic stepped automatic transmission or the like.

  As shown in FIG. 1, an automated manual transmission (hereinafter referred to as a stepped automatic transmission) 1 according to an embodiment of the present invention includes an input shaft 4 connected to a crankshaft 3 of a diesel engine 2 mounted on a vehicle, An output shaft 5 extending coaxially with the input shaft 4 and a sub shaft 6 disposed in parallel with the input shaft 4 and the output shaft 5 are provided in the gear box 7.

  Further, an input side main gear 8 is attached to the input shaft 4, a plurality of output side main gears 9 are attached to the output shaft 5, and a plurality of sub gears 10 are attached to the auxiliary shaft 6. The input main gear 8 of the input shaft 4 meshes with one of the sub gears 10 of the sub shaft 6, and the other sub gear 10 of the sub shaft 6 and the output main gear 9 of the output shaft 5 mesh with each other. The rotation of the input shaft 4 is transmitted to the output shaft 5 via the auxiliary shaft 6. A gear ratio which is a ratio of the rotational speed of the input shaft 4 and the rotational speed of the output shaft 5 is determined by the gear ratio of the input side main gear 8, the sub gear 10 and the output side main gear 9.

  Shifting of the shift stage in the stepped automatic transmission 1 is performed by a shift and selection drive device 13. The shift and selection drive device 13 is controlled by a shift speed control device 12 (TCM: control device for a stepped automatic transmission). The shift speed control device 12 includes an ECU (engine control unit) that controls the engine 2. It is connected to a control device 11 called.

  The gear stage control device 12 is data used for the operation of switching the gear stage to the target gear stage in the stepped automatic transmission 1 and shifts based on the vehicle speed and the accelerator opening degree of the vehicle. Shift map data indicating an up line and a shift down line is provided. The map is based on information on the vehicle speed sensor (vehicle speed detection device) 14 connected to the control device 11 through a signal line (shown by a one-dot chain line), the detected vehicle speed Vm detected by the accelerator opening sensor 15, and the detected accelerator opening αm. The target shift speed is determined with reference to the data, and the shift and selection drive device 13 is operated so as to shift to the target shift speed N.

  Further, the shift and selection drive device 13 selects a shift fork for rearranging the output-side main gear 9 by shifting the shift shaft 17 through a link mechanism 16 or the like connected to a built-in electric actuator, so that the target gear stage is selected. Shifting up or down is performed.

  In addition, a clutch 18 that connects and disconnects rotational power when a gear shifting operation is performed in the stepped automatic transmission 1 is interposed at the crankshaft side end of the input shaft 4.

  The gear position control device 12 according to the present invention detects the detected vehicle speed when the detected accelerator opening αm detected by the accelerator opening sensor 15 decreases after increasing, or when the so-called “accelerator release” occurs. Even if Vm and detected accelerator opening αm exceed the shift-up line of the shift map data, a shift-up suppressing means for performing control to suppress the gear shift up until the next shift-up permission condition is satisfied. (Or upshift suppression function).

  As the shift-up permission condition, a first period in which a change in the detected accelerator opening αm is within a preset range (a period in which the detected accelerator opening αm is substantially constant) is set as a first condition. There is a case where the time t1 has elapsed, and a second condition is that the detected vehicle speed Vm is increased and the vehicle is being accelerated at a predetermined acceleration or more. As a third condition, there is a case where the engine speed Nem detected by the engine speed sensor 20 has increased more than a preset speed. As a fourth condition, the detected vehicle speed Vm and the detected accelerator opening αm There are times when the shift-up line that exceeded the limit is exceeded again. It is assumed that the upshift permission condition is satisfied when any one of the first condition to the fourth condition is satisfied.

  The period in which the change in the detected accelerator opening αm is within a preset range is a period in which the detected accelerator opening αm is substantially constant. The preset range is the maximum accelerator opening. % Is in the range of plus or minus 10%. The first time t1 is a time set in advance based on the gear stage at the time when the accelerator is released and the gear shift history of the previous gear stage, and is 0.5 s to 1.5 s and 1 s to 3 s. Several numerical values are set step by step with numerical values between 3 s and 5 s, and these numerical values are selected and set to the first time.

  Further, the gear position control device 12 sets a second time that is set in advance as a time during which the shift-up permission condition from when the detected vehicle speed Vm and the detected accelerator opening αm exceed the shift-up line of the shift map data is not satisfied. When t2 elapses, it is configured to include suppression release means (or suppression release function) that performs control to remove the shift-up suppression by the shift-up suppression means. The second time t2 is a time for preventing the driver from feeling uncomfortable by making the suppression of the shift up too long, and is set to about 6s to 15s.

  Furthermore, it is preferable that the shift speed control device 12 includes first time changing means for changing the first time t1 of the first condition based on the history of changes in gear speed.

  Next, a control method for the stepped automatic transmission according to the embodiment of the present invention will be described. This stepped automatic transmission control method is data used for the operation of switching the gear stage to the target gear stage in the stepped automatic transmission 1, and is based on the vehicle speed and the accelerator opening degree of the vehicle. Using the shift map data indicating the up-shift line and the down-shift line, the gear to the target gear position is detected from the detected vehicle speed Vm detected by the vehicle speed sensor 14 and the detected accelerator opening αm detected by the accelerator opening sensor 15. This is a control method in which it is determined whether or not to change gears, and the shift operation is automatically performed.

  In this stepped automatic transmission control method, when the accelerator depression amount is decreased and the accelerator opening α becomes smaller after the accelerator is depressed and the accelerator opening α becomes larger, the detected vehicle speed Vm Even when the detected accelerator opening degree αm exceeds the shift-up line, when a period when the change in the detected accelerator opening degree αm is within a preset range has passed a preset first time t1, or the detected vehicle speed Vm Increases and the vehicle is accelerating at or above a preset acceleration, or when the engine speed Nem detected by the engine speed sensor 20 is increased above a preset speed, or the detected vehicle speed Vm Control is performed to suppress upshifting until any of the upshift permission conditions when the detected accelerator opening αm again exceeds the upshift line that has just exceeded is satisfied.

  A control method of the stepped automatic transmission will be described with reference to the control flow of FIG. The control flow shown in FIG. 2 is called from the advanced control flow when the vehicle engine 2 is started, and returns to the advanced control flow when the vehicle engine 2 is finished, together with the advanced control flow. It is shown as a control flow to end.

  When the control flow of FIG. 2 is started, in step S11, it is determined from the change in the detected accelerator opening αm whether or not the “accelerator removal” that decreases after the accelerator opening α has increased is generated. If “accelerator removal” has not occurred in this determination (NO), after the control time set in advance in step S21 has elapsed, the process returns to step S11 again, and the determination in step S11 is repeated.

  If it is determined in step S11 that “accelerator removal” has occurred (YES), the process goes to step S12 to start counting elapsed time. In the next step S13, it is determined whether or not the detected vehicle speed Vm detected by the vehicle speed sensor 14 and the detected accelerator opening αm detected by the accelerator opening sensor 15 exceed the shift-up line of the shift map data. If it is determined at step S13 that the shift-up line has not been exceeded (NO), after the control time set in advance at step S22 has elapsed, the process returns to step S13 again, and the determination at step S13 is repeated.

  If it is determined in step S13 that the “shift-up line” has exceeded the shift-up line (YES), the process goes to step S14 to start suppression of the shift-up. Wait without changing gear. In the next step S15, it is determined whether or not the upshift permission condition is satisfied. If it is determined that the upshift permission condition is satisfied (YES), the process goes to step S16 to permit the upshift, Ends upshift suppression, and shifts up by switching gears. Thereafter, the process returns to step s11.

  On the other hand, if it is determined in step S15 that the shift-up permission condition is not satisfied (NO), the process goes to step S17 to check the passage of time, and the elapsed time when the count is started in step S12 is preset. It is determined whether or not the second time t2 has elapsed. If it is determined in step S17 that the elapsed time has not passed the second time t2 (NO), after the control time preset in step S23 has elapsed, the process returns to step S14.

  If it is determined in step S17 that the elapsed time has passed the second time t2 (YES), the suppression of the upshift is canceled in step S18, and the detected vehicle speed Vm and the detected accelerator opening αm are shifted to the shift map. If the data shift-up line is exceeded, the process returns to the control to switch the gear, and the process returns to step S11. Thereafter, Step S11 to Step S16 or Step S18 are repeated, and when an interruption occurs when the operation of the engine 2 ends, the process returns to the advanced control flow, and the control flow of FIG. 2 is completed together with the advanced control flow. .

  Next, a description will be given of switching of the gear stage when the vehicle travels when the above control is performed. First, as shown in FIG. 8, when the vehicle is traveling on a winding road (winding road) without performing the above-described control, in the control that does not suppress the upshifting, it is troublesome to enter the corner. When the driver removes the accelerator for speed adjustment, the gear shifts up. However, since the driving force after exiting the corner is insufficient, the driver eventually shifts down to the original gear stage, and shift busy occurs repeatedly.

  More specifically, when the accelerator is depressed to increase the accelerator opening in order to climb the curved road as shown on the left side of FIG. 8 and the accelerator opening is increased to a point B in the shift map in the right diagram of FIG. When the accelerator opening is lowered (to remove the accelerator) in order to adjust the speed to move and reduce the vehicle speed before entering the corner, the point B passes from point B to point D. In the middle of this, since the shift-up line is exceeded at point C, the gear stage is switched from the third stage (3rd) to the fourth stage (4th), and the gear is shifted up.

  And, since the driving force of the vehicle for climbing is insufficient when exiting the corner, the vehicle speed decreases and the point moves from point D to point E, so the driver depresses the accelerator to increase the accelerator opening. , E point passes through F point and reaches G point. Since the shift down line is exceeded at this point F, the gear stage is eventually switched from the fourth stage (4th) to the third stage (3rd), downshifting, and returning to the original gear stage. By repeating this, the shift becomes busy.

  In contrast to the control of FIG. 8, in the case of the control of FIG. 3 in which the control flow of FIG. 2 is controlled, a condition is added to the shift up by the accelerator release operation to suppress the shift up (delay). . That is, in two steps, in the first step, an accelerator release operation is detected, and in the second step, the shift up is suppressed even if the shift up region is entered.

  More specifically, since the upshift is suppressed when driving on a curved uphill (winding uphill) as shown in FIG. 3, the driver performs an accelerator operation similar to that shown in FIG. Even if the map moves from point A to point B, passes from point B to point C to point D, or exceeds the point C shift-up line, the shift-up is suppressed and the gear stage is the third stage ( 3rd). And even if you escape from the corner and the vehicle speed decreases, you move from point D to point E, pass from point E to point F and reach point G, but you will pass the downshift line at point F, but already Since it is the third stage (3rd), the third stage (3rd) of the original gear stage is maintained without shifting down. Thereby, shift busy can be suppressed.

  Next, the effect of removing the driver's uncomfortable feeling in the control of the present invention in which the upshift permission condition is combined with the above upshift suppression will be described with reference to FIGS.

  FIG. 4 shows a case where the vehicle is traveling on a flat road or a straight uphill road while the accelerator is depressed and the accelerator is not pulled out. In this case, since there is no suppression of shift-up, the shift-up line (2nd → 3rd) is exceeded at point B and the shift-up line (3rd → 4th) at point C while moving from point A to point D in the shift map. Therefore, shift up each time. That is, if there is no accelerator release operation, the shift up is not suppressed, so that the shift up proceeds faithfully to the driver's accelerator operation, and there is no sense of incongruity.

  FIG. 5 shows the case where the first condition of the shift-up permission condition is satisfied, that is, the case where the first time period t1 in which the change in the detected accelerator opening αm is within the preset range has passed in advance. In other words, the case where the first time t1 has elapsed while the detected accelerator opening αm remains substantially constant is shown. When the accelerator is depressed on a flat road, etc., the shift map shifts from point A to point B, the accelerator depresses slowly, the accelerator opening decreases, and from point B via point C to point D When the accelerator opening is maintained substantially constant at point D, the accelerator is released, so the upshift at point C is suppressed and the upshift is not performed. If the condition is satisfied, the upshift is permitted, and at the point D, the third stage is switched to the fourth stage, and the upshift of 3rd → 4th is performed. As a result, the shift-up proceeds and the driver's accelerator operation is reflected, so that a sense of incongruity does not occur.

  Note that if the first time t1 is relatively short (for example, 1 s or less), the shift at the normal time when the downshift is not suppressed is approached, and if the first time t1 is relatively long (for example, 4 s or more), the effect of this upshifting is achieved. However, since the driver feels uncomfortable, the first time t1 should be set to an appropriate time while looking at the balance between the two gears and the shift history from the experimental results. become.

  FIG. 6 shows a case where the second condition of the shift-up permission condition is satisfied, that is, the condition that the detected vehicle speed Vm is increased and the vehicle is accelerated at a predetermined acceleration or more is satisfied. Show. When the accelerator is depressed on a flat road, etc., the shift map shifts from point A to point B, the accelerator depresses slowly, the accelerator opening decreases, and from point B via point C to point D Since the accelerator is removed in the case where it reaches, the upshift at the point C is suppressed and the upshift is not performed. However, even if the accelerator opening slightly changes at D point, if the detected vehicle speed Vm increases and shifts to E point, if the second condition is satisfied at E point, the upshift is permitted, At point E, the third stage is switched to the fourth stage, and a 3rd → 4th upshift is performed. As a result, the shift-up proceeds and the driver's accelerator operation is reflected, so that a sense of incongruity does not occur.

  FIG. 7 shows that the third condition of the upshift permission condition is satisfied, that is, the condition that the engine speed Nem detected by the engine speed sensor 20 has increased by a predetermined number or more is satisfied. Indicates the case. When the accelerator is depressed on a flat road, etc., the shift map shifts from point A to point B, the accelerator depresses slowly, the accelerator opening decreases, and from point B via point C to point D Since the accelerator is removed in the case where it reaches, the upshift at the point C is suppressed and the upshift is not performed. However, when the accelerator opening degree is slightly depressed at point D, the engine speed Nem increases, and the detected vehicle speed Vm increases and shifts from point D to point E, the second condition is satisfied at point E. If the condition is satisfied, the upshift is permitted, and the third stage is switched to the fourth stage at the point E, and the shift up from 3rd to 4th is performed. Further, when the vehicle speed Vm increases and exceeds the next shift-up line (4th → 5th) at the F point and shifts to the G point, the shift up is no longer suppressed at this time. The stage is switched from the fifth stage to the fifth stage, and the upshift from 4th to 5th is performed. In this way, since the shift up proceeds sequentially and the driver's accelerator operation is reflected, there is no need to feel uncomfortable.

  When the fourth condition of the shift-up permission condition is satisfied, that is, when the detected vehicle speed Vm and the detected accelerator opening αm exceed the shift-up line that has just been exceeded, the area where there is no need to shift up That is, since it has returned to the area before the accelerator release occurs, it is meaningless to continue to suppress the shift up, so the state is returned to the state in which the shift up is permitted. That is, the suppression of the upshift is released.

  Therefore, according to the shift speed control device (stepped automatic transmission control device) 12 and the stepped automatic transmission control method of the above-described embodiment, corner (curve) travel is detected when the vehicle is traveling uphill. There is no need to detect or detect the steering angle, the occurrence of shift busy of the stepped automatic transmission 1 can be suppressed, and the driver's driving intention detected in the state of the accelerator operation can be respected and utilized for shift up. it can.

  Although it is under specific conditions, by performing the control of the present invention through a running experiment, the number of shifts on the uphill traveling on the curved road is reduced by 30% to 40%, which is highly effective as a shift busy countermeasure. It has been confirmed that there is no sense of incongruity when driving on flat ground.

  A vehicle according to an embodiment of the present invention includes a shift speed control device 12 that is a control device for the stepped automatic transmission 1 described above, and includes the shift speed control device 12 and the The same effect as the control method of the automatic step transmission 1 can be obtained.

1 Stepped automatic transmission (AMT)
2 Diesel engine (internal combustion engine)
4 Input shaft 5 Output shaft 11 Control device (ECU)
12 gear stage control device (TCM: control device for stepped automatic transmission)
14 Vehicle speed sensor 15 Accelerator opening sensor 20 Engine speed sensor

Claims (5)

Shift map data that is used to switch the gear to the target gear in a stepped automatic transmission and that shows the up-shift line and the down-shift line based on the vehicle speed and accelerator opening of the vehicle On the basis of the detected vehicle speed detected by the vehicle speed detection device and the detected accelerator opening detected by the accelerator opening sensor, it is determined whether or not to change the gear stage to the target gear stage. In a control device for a stepped automatic transmission that automatically performs
If the detected accelerator opening detected by the accelerator opening detecting device is reduced after increasing, even if the detected vehicle speed and detected accelerator opening exceed the shift-up line of the shift map data,
When a period in which the change in the detected accelerator opening is within a preset range has passed a preset first time,
Or, when the detected vehicle speed increases and the vehicle is accelerating at or above a preset acceleration
Or, when the engine speed detected by the engine speed sensor increases more than a preset speed,
Alternatively, the shift is performed to suppress the shift up of the gear until the shift-up permission condition is satisfied when the detected vehicle speed and the detected accelerator opening exceed the shift-up line that has been exceeded immediately before. A control device for a stepped automatic transmission comprising an up suppression means.   When the time when the detected vehicle speed and the detected accelerator opening exceed the shift-up line of the shift map data and the shift-up permission condition from the time point is not satisfied exceeds a preset second time. The control device for a stepped automatic transmission according to claim 1, further comprising suppression release means for performing control to remove suppression of upshifting.   3. The control of the stepped automatic transmission according to claim 1, wherein the control device includes a first time changing unit that changes the first time based on a change history of the gear stage. 4. apparatus.   A vehicle comprising the control device for a stepped automatic transmission according to any one of claims 1 to 3. Shift map data that is used to switch the gear to the target gear in a stepped automatic transmission and that shows the up-shift line and the down-shift line based on the vehicle speed and accelerator opening of the vehicle Is used to determine whether or not to switch the gear to the target gear from the detected vehicle speed detected by the vehicle speed detector and the detected accelerator opening detected by the accelerator opening sensor. In the automatic stepped automatic transmission control method,
If the accelerator depression amount decreases and the accelerator opening decreases after the accelerator is stepped on and the accelerator opening increases, it will be detected even if the detected vehicle speed and detected accelerator opening exceed the upshift line. When a period in which the change in accelerator opening is within a preset range has passed a preset first time, or when the detected vehicle speed is increased and the vehicle is being accelerated more than a preset acceleration, Or, when the engine speed detected by the engine speed sensor increases more than a preset speed, or when the detected vehicle speed and the detected accelerator opening again exceed the shift-up line that has just been exceeded. A control method for a stepped automatic transmission, wherein control for suppressing upshifting is performed until such an upshift permission condition is satisfied.

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