JP5186742B2 - Automatic transmission mode switching control device - Google Patents

Description

  The present invention automatically changes the automatic return mode of the shift mode such as automatic return from the manual shift mode to the automatic shift mode of the automatic transmission and automatic return from the sporty shift mode to the economy shift mode. The present invention relates to an automatic transmission mode switching control device that can be made suitable for preference.

  Many automatic transmissions have a manual transmission mode in addition to the original automatic transmission mode. Conventionally, as an automatic transmission having these two modes, for example, as described in Patent Document 1 Things are known.

The automatic transmission described in this document is a manual operation that can be operated by a finger while keeping a hand on the steering wheel and a select lever installed in a vehicle body floor tunnel, etc., for commanding a shift mode of the automatic transmission by manual operation. It has a shift paddle and shift switch for shifting,
Even if the former select lever is set to the automatic shift range position where the shift in automatic shift mode is performed, the shift in the manual shift mode is temporarily performed when the latter shift paddle or shift switch is operated. Thus, the automatic transmission pursues the convenience of manual shifting.

Further, in Patent Document 1, after the automatic transmission mode is temporarily switched from the manual transmission mode to the manual transmission mode as described above, when the automatic transmission is automatically returned from the manual transmission mode to the automatic transmission mode,
Measures the elapsed time since switching to the manual shift mode temporarily by operating the shift paddle or shift switch, and automatically returns from the manual shift mode to the automatic shift mode when this elapsed time reaches the set time. It shows the technology that can be used.
JP 2000-283281 A

  By the way, in the automatic return technology from the manual shift mode to the automatic shift mode described in Patent Document 1, the manual shift mode is switched to the automatic shift mode when a set time has elapsed since the temporary shift to the manual shift mode. Since the automatic return (mode switching) is performed, the following problems are concerned.

In other words, since the set time is a fixed time, it is guaranteed that the timing at which the manual shift mode is automatically returned to the automatic shift mode after the set time has elapsed since the manual shift mode is reached is the timing requested by the driver. There is no.
For this reason, this timing is too late for a certain driver and forced to return to the manual shift mode, and for other drivers, this timing is too early, and the automatic shift mode is changed to the temporary manual shift mode again. The manual operation to switch is forced, and in any case, the manual operation is necessary and is troublesome.

  This problem occurs even in the case where the automatic return from the manual shift mode to the automatic shift mode (mode switching) is performed when the travel distance from when the manual shift mode is temporarily set reaches the set distance. The same occurs because the set distance cannot be consistent with the requirements of all drivers.

  In the present invention, from the viewpoint that the above-mentioned problems occur because the set time and set distance are constant values, these are learned and corrected according to the driver's habits and preferences for all drivers. It is an object of the present invention to propose an automatic transmission mode switching control device that realizes the above-described solution to problems by automatically returning a shift mode at a suitable timing.

For this purpose, the automatic transmission mode switching control device according to the present invention is constructed as described in claim 1.
First of all, to explain the prerequisite automatic transmission,
Manual switching from the first shift mode to the second shift mode is possible by manual operation, and when the predetermined condition is satisfied, the return from the second shift mode to the first shift mode is automatically performed. .

The present invention provides such an automatic transmission,
The automatic return condition from the second shift mode to the first shift mode is learned and corrected according to the driving operation of the driver,
When switching from the first shift mode to the second shift mode by manual operation is performed within a set time after the automatic return from the second shift mode to the first shift mode is performed, The automatic return condition is configured to perform learning correction in a direction in which automatic return from the second shift mode to the first shift mode is delayed .

According to the mode switching control device of the present invention, the automatic return condition from the second shift mode to the first shift mode is learned and corrected according to the driving operation of the driver,
The return timing from the second shift mode to the first shift mode, which is automatically performed when this predetermined condition is satisfied, is surely the timing requested by the driver.
Therefore, the timing is too late and the driver is forced to manually return to the shift mode, or the timing is too early and the driver is forced to manually switch from the first shift mode to the second shift mode again. Can be eliminated.

Hereinafter, embodiments of the present invention will be described in detail based on the embodiments shown in the drawings.
FIG. 1 shows a control system of an automatic transmission including a mode switching control device according to an embodiment of the present invention.
The automatic transmission 1 may be a stepped automatic transmission or a continuously variable transmission, but in any case, in addition to the automatic transmission mode (first transmission mode), the manual transmission mode (second transmission) Mode), and in the latter mode, the driver can perform shifting by manual operation.

For this reason, the automatic transmission 1 includes a select lever 2 as a shift mode selection means and shift paddles 3a and 3b as manual shift command means.
The former select lever 2 is for manually instructing the speed change mode of the automatic transmission 1, penetrates the vehicle body floor tunnel (not shown), is located near the driver's seat, and follows the operation pattern 4 Manual operation.
The latter shift paddles 3a, 3b are attached to the steering wheel 5 so that they can be operated with fingers while the hands are attached to the steering wheel 5, and are automatically returned to their original positions when the operating force is released. A manual upshift command Pad + is issued each time the shift paddle 3a is operated forward, and a manual downshift command Pad- is issued each time the shift paddle 3b is operated forward.

The operation pattern 4 of the select lever 2 includes
P range position where automatic transmission 1 is parked (P) range;
R range position to make automatic transmission 1 reverse running (R) range,
N range position that makes automatic transmission 1 neutral (N) range,
D range position to make automatic transmission 1 forward automatic shift (D) range,
DS / M range position to make automatic transmission 1 sporty (DS) traveling and manual transmission (M) range,
Manual upshift (M +) position,
Set the manual downshift (M-) position.

P range position, R range position, N range position, and D range position are arranged in a straight line in this order, and DS / M range position is arranged side by side along with the D range position.
A manual upshift (M +) position and a manual downshift (M-) in both directions parallel to the arrangement direction of the P range position, R range position, N range position, and D range position across the DS / M range position, respectively. ) Place the position.
It is assumed that the select lever 2 self-returns to the DS / M range position when the operating force is released after operating the manual upshift (M +) position or the manual downshift (M-) position.

A P range switch 4p that emits a P range signal when the select lever 2 is in the P range position;
R range switch 4r that emits an R range signal when the select lever 2 is in the R range position,
An N range switch 4n that emits an N range signal when the select lever 2 is in the N range position;
D range switch 4d that emits a D range signal when the select lever 2 is in the D range position,
DS / M range switch 4dsm that emits a DS / M range signal when the select lever 2 is in the DS / M range position,
A manual upshift switch 4mu that issues a manual upshift (M +) signal when the select lever 2 is in the manual upshift (M +) position;
A manual downshift switch 4md that generates a manual downshift (M-) signal when the select lever 2 is in the manual downshift (M-) position is provided in the select lever operation pattern 4.

The select lever position signal from the select lever operation pattern 4 is input to the transmission controller 6 together with the manual upshift command Pad + and the manual downshift command Pad− from the shift paddles 3a and 3b.
In addition to these signals, the transmission controller 6 includes a signal related to the vehicle speed VSP from the speedometer 7, a signal from the accelerator position sensor 8 that detects the accelerator pedal depression amount (accelerator position) APO, and the lateral acceleration of the vehicle. A signal from the lateral acceleration sensor 9 that detects Gy and a signal from the longitudinal acceleration sensor 10 that detects the longitudinal acceleration Gx of the vehicle are input.

The transmission controller 6 controls the shift of the automatic transmission 1 via the control valve body 1a based on the input information.
When the select lever 2 is in the P range position, it receives the P range signal from the switch 4p,
When the select lever 2 is in the R range position, it receives the R range signal from the switch 4r,
When select lever 2 is in the N range position, it receives the N range signal from switch 4n,
When the select lever 2 is in the D range position, it receives the D range signal from the switch 4d,
The automatic transmission 1 is shift-controlled with a shift mode corresponding to each range.

Since the shift mode when the select lever 2 is in the forward automatic shift (D) range position is related to the present invention, this will be described representatively.
In this D range, the transmission controller 6 uses the vehicle speed VSP detected by the speedometer 7 and the accelerator opening APO detected by the sensor 8 to determine the target gear position (in the case of a continuously variable transmission) based on the planned shift line. Is determined, and the automatic transmission 1 is controlled to shift through the control valve body 1a so that this is achieved. (Automatic shift mode)

In this automatic transmission (D) mode, the vehicle's lateral acceleration Gy and longitudinal acceleration Gx detected by the sensors 9 and 10 are more frequently set values or higher, and the lateral acceleration Gy and longitudinal acceleration Gx change with time. It is determined that the driver is driving sporty when the ratio is higher than the set value.
The above-described scheduled shift line is switched to a sporty travel shift line, and the target shift speed (target gear ratio) is obtained based on the sporty travel shift line to contribute to the shift control described above. As a trend, sporty driving will be possible.
Of course, in the automatic shift (D) mode, it goes without saying that the automatic return to the normal automatic shift based on the planned shift line is automatically made when it is no longer determined to be sporty driving.

  When the select lever 2 is in the DS / M range position, the transmission controller 6 receives the DS / M range signal from the DS / M range switch 4dsm and controls the automatic transmission 1 as follows.

When the select lever 2 is simply switched to the DS / M range position from the shift control state in the automatic shift (D) mode, that is, the select lever 2 is moved to the manual upshift (M +) position, or the manual downshift (M If the switch is not in the-) position, therefore, the manual upshift (M +) signal and the manual downshift (M-) signal are not output from the switches 4mu and 4md, and a manual upshift command Pad + is issued by operating the shift paddle 3a. Or manual downshift command Pad- is not issued by operating shift paddle 3b.
As shown by arrow A in FIG. 2, the D range sporty (DS) mode is set, and the shift control based on the sporty driving shift line is the same as when the sporty driving is determined in the automatic shifting (D) mode. Do.

In this D-range sporty (DS) mode, it does not automatically return to normal gearshift control when it is no longer sporty, as in sporty gearshift control in automatic gearshift (D) mode.
As indicated by arrow B in FIG. 2, the sporty travel shift control can be returned to normal shift control only by manual operation of switching the select lever 2 from the DS / M range position to the D range position. Until then, the shift control for sporty running is continued.

When the select lever 2 is moved from the DS / M range position to the manual upshift (M +) position or the manual downshift (M-) position in the D range sporty (DS) mode, the transmission controller 6 switches to 4mu, 4md. In response to a manual upshift (M +) signal or a manual downshift (M−) signal output from, a manual shift (M) mode is set as indicated by an arrow C in FIG.
In this manual shift (M) mode, the transmission controller 6 moves the switch 4mu, 4md from the manual upshift (when the select lever 2 is set to the manual upshift (M +) position or the manual downshift (M-) position ( Each time an (M +) signal or a manual downshift (M−) signal is output, the automatic transmission 1 is upshifted or downshifted by one shift step.

The transition to manual shift (M) mode indicated by arrow C in Fig. 2 is instead of moving the select lever 2 from the DS / M range position to the manual upshift (M +) position or the manual downshift (M-) position. Alternatively, the shift paddle 3a may be operated forward to generate a manual upshift command Pad +, or the shift paddle 3b may be operated forward to generate a manual downshift command Pad-.
In the manual shift (M) mode shifted in this way, the transmission controller 6 performs a manual upshift command Pad + generated every time the shift paddle 3a is operated, or a manual downshift generated every time the shift paddle 3b is operated. The automatic transmission 1 is upshifted or downshifted by the number of shift stages corresponding to the number of times of the command Pad−.

  When the select lever 2 is operated from the DS / M range position to the D range position, the transmission controller 6 automatically changes from the manual shift (M) mode as indicated by an arrow E in FIG. The mode is switched to the shift (D) mode, and the shift control of the automatic transmission 1 is performed in the automatic shift (D) mode.

When the automatic shift (D) mode is selected with the select lever 2 in the D range position, a manual upshift command Pad + is generated by operating the shift paddle 3a or a manual downshift command Pad- is generated by operating the shift paddle 3b. Even if the select lever 2 remains in the D range position, the transmission controller 6 changes the automatic transmission 1 from the automatic transmission (D) mode to the D mode automatic return type manual transmission (DM) as shown by the arrow F in FIG. ) Mode to enable manual shifting.
In other words, every time the manual upshift command Pad + is generated by operating the shift paddle 3a or the manual downshift command Pad- is generated by operating the shift paddle 3b, the automatic transmission 1 is upshifted or downshifted by one shift step. Can be made.

However, the D-mode automatic return manual shift (DM) mode here is different from the manual shift (M) mode described above. Specifically, as shown by an arrow G in FIG. ) Shall be automatically returned to mode.
Here, the above-mentioned predetermined condition means that the state in which the manual upshift command Pad + or the manual downshift command Pad− is generated for a set time or more by operating the shift paddle 3a or 3b forward, or the D range Even when one of these conditions is met, such as when the position select lever 2 is once set to the DM range position and returned to the D range position again, or when the vehicle speed VSP becomes 0, or when the travel distance condition described later is satisfied. In this case, it is assumed that the automatic return from the D-mode automatic return manual shift (DM) mode to the automatic shift (D) mode is performed.

  When the select lever 2 is moved from the D range position to the DS / M range position in the D mode automatic return manual shift (DM) mode, the transmission controller 6 responds to the corresponding input signal as shown by an arrow H in FIG. The automatic transmission 1 can be switched from the D-mode automatic return type manual shift (DM) mode to the manual shift (M) mode, and the manual shift in the above-described manual shift (M) mode without automatic return to the D mode is possible. To.

A control program for automatically returning the automatic transmission 1 from the D-mode automatic return type manual shift (DM) mode to the automatic shift (D) mode according to the travel distance condition will be described with reference to FIG. To do.
First, in step S1, a manual upshift command Pad + is generated by operating the shift paddle 3a while the automatic shift (D) mode is selected with the select lever 2 in the D range position, or a manual downshift command is operated by operating the shift paddle 3b. Whether or not Pad- is generated, that is, even if the select lever 2 remains in the D range position, the automatic transmission 1 can be automatically returned from the automatic transmission (D) mode to the D mode as shown by arrow F in FIG. Check if the driver wants manual shift (DM) mode to perform manual shift.

If the driver does not want to switch from the automatic shift (D) mode to the D-mode automatic return manual shift (DM) mode and perform manual shift, the control is returned to the original and the current shift control mode is continued.
When the driver wishes to switch from the automatic shift (D) mode to the D-mode automatic return manual shift (DM) mode and perform manual shift, the control proceeds from step S1 to step S2, and the automatic shift (D) mode Is switched to the D mode automatic return manual shift (DM) mode, and the manual shift control in the mode is performed by selecting the automatic return manual shift (DM) mode.
That is, each time the manual upshift command Pad + is generated by operating the shift paddle 3a or the manual downshift command Pad- is generated by operating the shift paddle 3b, the automatic transmission 1 is shifted to the first gear position in response to these commands. Shift up or down one by one.

The automatic return from the D-mode automatic return manual shift (DM) mode to the automatic shift (D) mode indicated by the arrow G in FIG. 2 according to the travel distance is performed in steps S3 to S13.
In step S3, whether the vehicle is stopped or traveling is checked based on whether or not the vehicle speed VSP is 0. If the vehicle is stopped, the control proceeds to step S12, and the automatic shift (DM) mode is changed to the automatic shift (D ) Automatic return to mode is performed, and then shift control in D mode is executed.

If the vehicle is running, in step S4, it is checked whether or not the engine opening is requested when the accelerator opening APO = 0 (no-load operation).
In step S5, it is checked whether the vehicle is cornering by checking whether the lateral acceleration Gy detected by the sensor 9 is equal to or greater than the set value Gyo for a predetermined time or more,
In step S6, it is checked whether acceleration / deceleration driving is performed based on whether the longitudinal acceleration Gx of the vehicle detected by the sensor 10 is equal to or greater than a set value Gxo,
In step S7, it is checked whether or not there is a paddle re-operation after the operation of the paddles 3a and 3b determined in step S1.

  In step S4, it is determined that the accelerator opening APO> 0 (engine brake is not required), in step S5 it is determined that cornering is not being performed, and in step S6 it is determined that acceleration / deceleration is not being performed, and If it is determined in step S7 that the paddles 3a and 3b are not re-operated, that is, if conditions for permitting the return from the D-mode automatic return manual shift (DM) mode to the automatic shift (D) mode are satisfied. In step S8, it is determined whether or not this is the first time after the return permission (immediately after the return permission).

When it is determined in step S8 that it is immediately after permission to return from the D mode automatic return type manual shift (DM) mode to the automatic shift (D) mode, in step S9, whether or not the mode return should be performed is determined. Reads the set distance Ls for D-mode automatic return judgment used for judgment.
This D-mode automatic return determination set distance Ls is stored as a map for each selected shift stage of the automatic transmission 1, and the longer the higher the vehicle speed and the higher the selected shift stage, the longer the distance. And
Therefore, the setting distance Ls for D-mode automatic return determination is read by searching a planned map from the selected gear position and vehicle speed VSP of the automatic transmission 1.

Note that the shortest set distance Lsmin and the longest set distance Lsmax are defined as the set distance Ls for D-mode automatic return determination,
The shortest set distance Lsmin is the mode in which the return point from the D-mode automatic return type manual shift (DM) mode to the automatic shift (D) mode is the fastest in the range where the driver does not feel that the mode return is too early. It corresponds to the mileage of the vehicle that will be the return point,
The longest setting distance Lsmax is the mode in which the return point from the D-mode automatic return type manual shift (DM) mode to the automatic shift (D) mode is the slowest in the range that does not make the driver feel that the mode return is too late. It corresponds to the travel distance of the vehicle that is the return point.

When the setting distance Ls for D mode automatic return determination is read in step S9, and it is determined immediately after permission to return from the D mode automatic return manual shift (DM) mode to the automatic shift (D) mode in step S8, The control is executed only once, and then the control continuously proceeds from step S8 to step S10, where the travel distance L is continuously accumulated.
The travel distance L obtained by this integration is the vehicle from the time when D → DM mode switching was performed in step S2 (provided that permission for returning from DM → D mode was determined in steps S3 to S7). Corresponds to mileage.

  In step S11, it is checked whether or not the travel distance L has reached the set distance Ls for D-mode automatic return determination obtained in step S9, and the control returns to step S3 and waits until L ≧ Ls. When L ≧ Ls, the control advances to step S12 to automatically return from the automatic return manual shift (DM) mode to the automatic shift (D) mode, and then execute the shift control in the D mode. .

Therefore, if the vehicle travel distance L from when the D-mode automatic return type manual shift (DM) mode is temporarily set by the operation of the paddles 3a and 3b in the automatic shift (D) mode becomes the set distance Ls, It will cause the mode to return automatically from manual shift (DM) mode to automatic shift (D) mode,
If the point where the D-mode automatic return manual shift (DM) mode is temporarily changed is the same, the D-mode automatic return manual shift (DM) mode to the automatic shift (D) mode are used regardless of the vehicle speed VSP. Because the return point to the same position is the same, there is a problem with the uncomfortable feeling that the return from the D-mode automatic return manual shift (DM) mode to the automatic shift (D) mode is faster at low vehicle speeds than at high vehicle speeds. There is nothing.

Moreover, the set distance Ls is increased as the vehicle speed VSP is increased, and the set distance Ls is increased as the selected shift speed is higher.
When switching to DM mode at high vehicle speeds or high gears, it is possible to meet the requirement that it is better to return to D mode with sufficient time for driving.

On the other hand, it is determined in step S4 of FIG. 3 that the engine brake is requested when the accelerator opening APO = 0, or it is determined that cornering is in progress in step S5, or acceleration / deceleration is in progress in step S6. Or when it is determined in step S76 that paddles 3a and 3b have been re-operated,
Since the manual shift in the DM mode is a preferable traveling state, the control proceeds to step S13, where the traveling distance L accumulated in step S10 is reset to 0, and then the control is returned to step S3 to return to the D mode. The manual shift in the DM mode is continued by not executing step S12 until the various conditions permitting and returning (conditions in steps S3 to S11) are satisfied.

From this state, it is determined at step S4 that the accelerator opening APO> 0 is not required, and it is determined at step S5 that cornering is not being performed, and at step S6, acceleration / deceleration is not being determined. In addition, after determining that there is no re-operation of the paddles 3a and 3b in step S7, when DM → D mode return permission is permitted,
In step S8 to step S11, when it is determined that the vehicle travel distance L from the mode return permission has reached the set distance Ls for D mode automatic return determination, automatic return from the DM mode to the D mode is executed in step S12. To do.

By the way, in the present embodiment, when the engine brake is requested (step S4), during cornering traveling (step S5), during acceleration / deceleration traveling (step S6), or when the paddles 3a and 3b are operated again (step S7). For example, the mileage integrated value L is set to 0 in step S12, and the control is returned to step S3, so that manual shifting in the DM mode is continued.
When such a manual shift in the DM mode is in a preferable traveling state, the automatic return to the D mode is performed, and the foolishness that the manual shift in the DM mode cannot be continued can be avoided.

Hereinafter, the learning correction procedure for the set distance Ls for D-mode automatic return determination read in step S9 will be described. This learning correction is performed by executing the control program shown in FIG.
In step S21, as in step S3 of FIG. 3, it is checked whether or not the vehicle speed VSP is in a stopped state. If the vehicle is in a stopped state, the control is terminated as it is, and learning correction of the set distance Ls for D-mode automatic return determination is performed. Do not do.

If it is determined in step S21 that the vehicle is traveling,
In step S22, whether or not the D-mode automatic return prohibition condition for the accelerator opening APO = 0 as in step S4 in FIG.
In step S23, whether or not the D mode automatic return prohibition condition of the lateral acceleration Gy ≧ Gyo as in step S5 of FIG.
In step S24, it is checked whether or not a D-mode automatic return prohibition condition of longitudinal acceleration Gx ≧ Gxo similar to that in step S6 of FIG. 3 is satisfied.

If even one of these three types of D-mode automatic return prohibition conditions is satisfied, the control is terminated as it is, and the learning correction of the set distance Ls for D-mode automatic return determination is not performed.
However, if all of these three types of D-mode automatic return prohibition conditions are not satisfied and D-mode automatic return is permitted, the control proceeds to step S25, and the same travel distance L ≧ as in step S11 of FIG. Check whether Ls D mode automatic return condition is satisfied.

If it is determined in step S25 that the travel distance L is not greater than or equal to Ls, the control advances to step S26 to check whether there is a manual return operation to the D mode.
As described above, the manual operation to return to the D mode lasts more than the set time by operating the shift paddle 3a or 3b and generating the manual upshift command Pad + or the manual downshift command Pad-. Or the D range position select lever 2 is once set to the DM range position to return to the D range position again.

The determination in step S25 and step S26 is performed before the travel distance L after the automatic return to the D mode is permitted in steps S22 to S24 reaches the set distance Ls for the D mode automatic return determination (D mode automatic return). This is a step to determine whether or not there is a manual operation to return to D mode before the operation is performed. When there is such a manual operation, the driver feels that returning to D mode is slow. In S27, learning correction is performed to shorten the set distance Ls for D-mode automatic return determination by ΔLs, so that automatic return to D-mode is accelerated.
However, if it is determined in step S26 that there is no manual return operation to the D mode, the control is terminated as it is and the learning correction of the D-mode automatic return determination setting distance Ls is not performed.

Note that the learning correction of the set distance Ls for D-mode automatic return determination in step S27 exists for each gear position and vehicle speed VSP as described above, so the D mode corresponding to the selected gear speed and the current vehicle speed. Of course, the learning correction is performed on the set distance Ls for automatic return determination.
In addition, the shortest distance Lsmin is set as a lower limit value for the learning-corrected D-mode automatic return determination setting distance Ls so as not to become shorter than this.

If it is determined in step S25 that the D-mode automatic return condition of travel distance L ≧ Ls is satisfied (when automatic return to the D mode is performed), in step S28, a set time (for example, 1 to Check whether 5 seconds) has elapsed.
If the set time (for example, 1 to 5 seconds) has not yet elapsed since the automatic return to D mode, the select lever 2 is operated from the D range position to the DS / M range position within this set time in step S29. It is checked whether or not the manual shift (M) mode as indicated by an arrow H in FIG. 2 has been switched, and if not, the control is returned to step S28, and the select lever 2 is continuously pressed during the above set time. Check for switching to manual shift (M) mode by operating from the D range position to the DS / M range position.

If it is determined in step S28 and step S29 that the selector lever 2 is operated from the D range position to the DS / M range position during the set time and the manual shift (M) mode is switched, the driver However, in step S30, learning correction is performed to increase the set distance Ls for D-mode automatic return determination by ΔLs, thereby delaying automatic return to D-mode. Do it like this.
However, if it is determined in step S28 that the set time (for example, 1 to 5 seconds) has elapsed since the automatic return to the D mode, the control is ended as it is and the learning correction of the set distance Ls for the D mode automatic return determination is performed. Not performed.

Note that the learning correction of the set distance Ls for D-mode automatic return determination in step S30 exists for each gear position and vehicle speed VSP as described above, so the D-mode corresponding to the selected gear speed and the current vehicle speed. Of course, the learning correction is performed on the set distance Ls for automatic return determination.
In addition, the longest distance Lsmax is set as the upper limit value for the learning-corrected D-mode automatic return determination setting distance Ls so as not to become longer than this.

  According to the above embodiment, the D mode automatic return for determining whether or not the automatic return from the D mode automatic return manual shift (DM) mode to the automatic shift (D) mode should be performed (L ≧ Ls). Since the determination set distance Ls is learned and corrected according to the driving operation of the driver, the following functions and effects can be obtained.

That is, when the D-mode automatic return type manual shift (DM) mode is selected (step S25) and the manual shift operation returns to the automatic shift (D) mode (step S26), the D-mode automatic return determination is made. Because the set distance Ls has been corrected for learning so that automatic return from D-mode automatic return manual shift (DM) mode to automatic shift (D) mode is accelerated (step S27),
For drivers who feel that the return timing from the DM mode to the D mode is too late, the automatic return from the DM mode to the D mode will be performed at the timing requested by the driver, and the driver will manually perform the D mode. It is possible to avoid the annoyance that is forced to perform the return operation.

By the way, when an engine brake is requested due to no-load operation where automatic return from the DM mode to the D mode is prohibited (steps S4 and S22), or when the lateral acceleration Gy of the vehicle is equal to or greater than the set value Gyo (step S5). And when the longitudinal acceleration Gx of the vehicle is greater than or equal to the set value Gxo (step S6 and step S24), in order to prohibit learning correction of the set distance Ls for D-mode automatic return determination,
If even one of these D-mode automatic return prohibition conditions is met, even if the driver manually returns from DM mode to D-mode, learning correction of the set distance Ls for D-mode automatic return determination is performed. There is no.

By the way, in the driving conditions where automatic return from DM mode to D mode is prohibited, the driver will not feel dissatisfied (if it is too late) the timing of the automatic return, and from the above manual DM mode to D mode The return operation to is based on an erroneous operation.
Nonetheless, if the learning correction of the set distance Ls for D-mode automatic return determination is performed based on this, this becomes erroneous learning and the above-mentioned effects cannot be achieved. Since the learning correction of the set distance Ls for D-mode automatic return determination is prohibited as described above, it is possible to avoid the occurrence of a problem due to such erroneous learning.

In this embodiment, when the manual shift mode is switched again by manual operation within the set time after the automatic return from the DM mode to the D mode (step S25 and step S28) (step S29). ), Because the D-mode automatic return determination set distance Ls is learned and corrected in such a direction that the automatic return from the D-mode automatic return type manual shift (DM) mode to the automatic shift (D) mode is delayed (step S30).
Even for the driver who feels that the return timing from the DM mode to the D mode is too early, the automatic return from the DM mode to the D mode is surely performed at the timing requested by the driver. The troublesomeness that must be switched from the mode to the manual shift mode can be eliminated.

By the way, in the vehicle stop state in which automatic return from the DM mode to the D mode is unconditionally performed (steps S3 and S12), the control is terminated as it is in step S21 in FIG. 4 to change from the DM mode to the D mode. Since the learning correction of the set distance Ls for D-mode automatic return determination in the direction that the return timing of is delayed is prohibited,
Even if there is a manual switching operation from the D mode to the manual shift mode after the vehicle stops, the learning correction of the set distance Ls for D mode automatic return determination in the direction that the return timing from the DM mode to the D mode is delayed is performed. There is no.

By the way, when the automatic return from the DM mode to the D mode is performed as the vehicle stops, the driver will not feel dissatisfied (if it is too early), and after the above stop The manual switching operation from the D mode to the manual speed change mode in is based on an erroneous operation or the like.
Nonetheless, based on this, the learning correction of the set distance Ls for D-mode automatic return determination in the direction that the return timing from DM mode to D-mode is delayed will result in false learning and the above-mentioned Can not achieve the effect,
In the present embodiment, at this time, learning correction of the set distance Ls for D-mode automatic return determination is prohibited as described above, so that it is possible to avoid the occurrence of a problem due to such erroneous learning.

Further, in the present embodiment, since the learning correction of the set distance Ls for D-mode automatic return determination is performed for each selected shift speed of the automatic transmission and the vehicle speed VSP, the above-described effects are obtained under any shift speed and vehicle speed VSP. Can be achieved reliably.
Further, the lower limit value Lsmin and the upper limit value Lsmax are set as the learning correction value for the set distance Ls for D-mode automatic return determination so that the learning correction value does not exceed these upper and lower limit values (steps S27 and S30). ), An adverse effect of excessive learning correction can be avoided.

In the above-described embodiment, the case where the first shift mode is the automatic shift (D) mode and the second shift mode is the manual shift (DM) mode has been described, but the first shift mode is the economy mode, Needless to say, the above-described concept of the present invention can be applied as it is to the mode switching between other types of speed change modes, such as the second speed change mode being a sporty mode. .
In the above-described embodiment, when the automatic return condition from the manual shift (DM) mode (second shift mode) to the automatic shift (D) mode (first shift mode) is the D-mode automatic return determination set distance Ls However, even when the automatic return condition of the shift mode is a set time or other quantitative physical quantity, the above-described idea of the present invention can be applied as it is to achieve the same effect. Of course.

1 is a schematic system diagram showing a control system for an automatic transmission including a mode switching control device according to an embodiment of the present invention. FIG. 2 is a shift mode change pattern diagram showing a correlation between a select lever operation and a shift paddle operation of the automatic transmission in FIG. 1 and a shift mode selectable thereby. 3 is a flowchart showing an automatic return control program from a manual shift mode to an automatic shift mode, which is executed by a transmission controller in the control system of FIG. It is a flowchart which shows the learning correction program of the setting distance regarding the vehicle travel distance for determining whether it should return from manual shift mode to automatic shift mode.

Explanation of symbols

1 Automatic transmission
1a Control valve body
2 Select lever (shifting mode selection means)
3a, 3b Shift paddle (manual shift command means)
4 Select lever operation pattern
5 Steering wheel
6 Transmission controller
7 Speedometer
8 Accelerator position sensor
9 Lateral acceleration sensor
10 Longitudinal acceleration sensor

Claims (8)

Can manually switching from the first shift mode by a manual operation to the second speed change mode, return from automatically the second shift mode when a predetermined condition is satisfied to the first speed change mode is to be performed automatically In the transmission,
An automatic return condition to the second shift mode from the first shift mode, so as to learning correction according to the driving operation of the driver,
When switching from the first shift mode to the second shift mode by manual operation is performed within a set time after the automatic return from the second shift mode to the first shift mode is performed, A mode switching control device for an automatic transmission , wherein the automatic return condition is configured to be learned and corrected in a direction in which automatic return from the second shift mode to the first shift mode is delayed . In the automatic transmission mode switching control device according to claim 1,
When returning from the second shift mode to the first shift mode by a manual operation while the second shift mode is selected, the automatic return condition is changed from the second shift mode to the first shift mode. A mode switching control device for an automatic transmission, characterized in that learning correction is performed in a direction in which automatic return to the 1-shift mode is accelerated . The automatic transmission mode switching control according to claim 1 or 2, wherein the automatic transmission prohibits automatic return from the second shift mode to the first shift mode during no-load operation of the vehicle. In the device
An automatic transmission mode switching control device configured to prohibit learning correction of the automatic return condition during no-load driving of the vehicle in a state where the second shift mode is selected . The automatic transmission according to claim 1 or 2, wherein when the lateral acceleration of the vehicle is equal to or greater than a set value, the automatic transmission prohibits automatic return from the second shift mode to the first shift mode. In the machine mode switching control device,
The automatic transmission mode switching control device is configured to prohibit learning correction of the automatic return condition when the lateral acceleration of the vehicle is equal to or greater than the set value . The automatic transmission according to claim 1 or 2, wherein when the longitudinal acceleration of the vehicle is equal to or greater than a set value, the automatic transmission prohibits automatic return from the second shift mode to the first shift mode. In the machine mode switching control device,
An automatic transmission mode switching control device configured to prohibit learning correction of the automatic return condition when the longitudinal acceleration of the vehicle is equal to or greater than the set value . When the vehicle is stopped the automatic transmission, the second one in which the shift mode for automatic return to the first speed change mode, the mode switching control of the automatic transmission according to claim 1 In the device
Wherein from the first shift mode by manual operation after stopping if there are switch to the second speed change mode, the automatic return from the second speed change mode to the direction in which the automatic return is delayed to the first speed change mode An automatic transmission mode switching control device characterized by prohibiting learning correction of conditions. In the automatic transmission mode switching control device according to any one of claims 1 to 6, wherein the automatic return condition is different for each selected shift stage of the automatic transmission .
A mode switching control device for an automatic transmission, wherein the learning correction of the automatic return condition is performed for each selected shift stage of the automatic transmission. In the automatic transmission mode switching control device according to any one of claims 1 to 7,
An automatic transmission mode switching control device, wherein upper and lower limit values are set as learning correction values for the automatic return condition, and the learning correction values do not exceed these upper and lower limit values.

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