JP2010071299A - Manual down-shift control device of automatic transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a manual down-shift by switching to a manual shift mode from an automatic shift mode to become a shift to a shift stage corresponding to a driving intention, a traveling state and a traveling condition. <P>SOLUTION: In a decelerating manual down shift of determining that there is switching (a manual down-shift request) to the manual shift mode in S11 and determining as coasting (inertia) travel in S12, when determining that a sporty travel degree indexed from a driving tendency is a preset degree or more or vehicle deceleration in the decelerating manual down-shift is preset deceleration or more in S15, target deceleration Gxo in the decelerating manual down-shift is set high as the degree becomes a strong sporty travel degree and as the vehicle deceleration in the decelerating manual down-shift becomes high in S16. In S18, a manual shift stage for achieving this Gxo is determined as a target shift stage in the decelerating manual down-shift, and in S19, shift processing is performed to the target shift stage. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides an automatic transmission of an automatic transmission having a manual shift mode in which a plurality of shift stages having a fixed gear ratio can be manually selected in addition to an automatic shift mode in which a gear ratio can be automatically selected. The present invention relates to a manual downshift control device that is operated by mode switching from a mode to a manual shift mode.

  Automatic transmissions, including continuously variable transmissions, are subject to engine load and vehicle speed in automatic transmission modes that select the automatic transmission (D) range or low (L) range (a range that limits the selection of the high gear ratio). The gear ratio (shift speed) can be automatically selected according to the vehicle operating state that can be determined from the above, and it is a common practice to switch between these ranges in the automatic transmission mode by the driver's operation.

On the other hand, automatic transmissions require a greater driving force than can be obtained with the automatic shift (D) range above, and engine brakes greater than those obtained with the low (L) range above. In order to satisfy the demands such as when the driver needs
In addition to the automatic transmission mode, there are many types in which a manual transmission mode in which a plurality of gear ratios with a fixed transmission ratio can be manually selected is set.
In such an automatic transmission with a manual transmission mode, when an accurate engine brake is required during traveling in the automatic transmission mode, the automatic transmission is switched from the automatic transmission mode to the manual transmission mode. Automatic transmission can be downshifted manually.

As a technique for determining a target shift stage that is a shift destination at the time of such a manual downshift, conventionally, for example, the techniques described in Patent Documents 1 and 2 are known.
In these manual downshift target shift stage determination techniques described in Patent Documents 1 and 2, when shifting to a lower shift stage than the currently selected shift stage selected based on the vehicle speed and vehicle running resistance Vehicle speed is estimated for each gear position, and among the estimated deceleration speeds for each gear position, the gear speed corresponding to the estimated deceleration closest to a predetermined target deceleration is determined as the target gear speed. Is.
JP 2004-246991 A Japanese Patent Application Laid-Open No. 07-305765

However, in the conventional manual downshift target gear position determination technique described above, the target deceleration used for this determination is a predetermined target deceleration, so that each driver's intention to drive And there is no compensation that always matches the driving conditions and driving conditions,
In the above-described conventional method, in which the target gear stage is defined as the gear stage that can achieve the target deceleration most, the target gear stage is a target gear stage that closely matches the driver's driving intention, driving state, and driving conditions. It's hard to say.

The present invention does not set the target deceleration at the time of manual downshift to a constant value as in the prior art, but changes according to the driver's past driving characteristics, the current driving state, and the driving conditions,
The above-mentioned problem can be solved by making the target gear position at the time of manual downshift determined based on this target deceleration match the driver's driving intention, driving condition, and driving condition. An object of the present invention is to propose a manual downshift control device for an automatic transmission.

For this purpose, a manual downshift control device for an automatic transmission according to the present invention is configured as described in claim 1, claim 2, or claim 3.
First of all, to explain the prerequisite automatic transmission,
There is a manual shift mode in which a plurality of fixed gear ratios can be manually selected, and when switching from the automatic shift mode to the manual shift mode, one of the shift stages is targeted by a predetermined calculation. It is determined as a gear position and shifts to the target gear position.

The present invention of claim 1 is such an automatic transmission,
In the predetermined calculation, the driving ability 癖 index obtained by indexing the degree of sporty driving from the driving tendency of the past driver is referred to, and the target of the vehicle increases as the driving ability 癖 index indicates a stronger degree of sporty driving. The present invention is characterized in that a deceleration that can be set high and a gear that can realize the target deceleration is determined as the target gear among the gears that are set in the manual gear shift mode.

The present invention of claim 2 is the above automatic transmission,
In the predetermined calculation, the vehicle deceleration at the time of the mode switching is referred to. The higher the vehicle deceleration is, the higher the vehicle target deceleration is set. The shift speed capable of realizing the target deceleration is defined as the target shift speed.

The present invention of claim 3 is the above automatic transmission,
In the predetermined calculation, with reference to the driving tendency index determined by indexing the degree of sporty driving from the driving tendency by the past driver, and the vehicle deceleration at the time of the mode switching, this driving ability index is The higher the vehicle deceleration is, the higher the vehicle deceleration is, and the higher the vehicle target deceleration is set, and the gear stage capable of realizing the target deceleration among the above-described gear stages set in the manual transmission mode. Is defined as the target shift speed.

According to the manual downshift control device of the present invention of claim 1,
The higher the drivability index indicates the degree of sporty driving, the higher the target deceleration at the time of manual downshift of the vehicle, and among the above-mentioned shift speeds set in the manual shift mode, the shift speed that can realize the target deceleration is set. To determine the target gear position during manual downshift,
The target deceleration at the time of manual downshift will be changed according to the driver's intention to drive, and the target gear position at the time of manual downshift determined based on this target deceleration will well reflect the driver's intention to drive Thus, manual downshift control that matches the driving intention of the driver can be realized.

According to the manual downshift control device of the present invention of claim 2,
The higher the vehicle deceleration at the time of mode switching from the automatic transmission mode to the manual transmission mode, the higher the target deceleration at the time of manual downshifting of the vehicle, and the target deceleration among the above-mentioned shift stages set to the manual transmission mode. Is determined as the target gear position during manual downshift,
The target deceleration during manual downshifting will be changed according to the current driving conditions and driving conditions, and the target gear position during manual downshifting determined based on this target deceleration will also change the current driving conditions and driving conditions. It is well reflected, and it is possible to realize manual downshift control that matches the current driving state and driving conditions.

According to the manual downshift control device of the present invention of claim 3,
As the drivability index increases the degree of sporty driving, and the higher the vehicle deceleration is when switching from automatic shift mode to manual shift mode, the target deceleration during manual downshift of the vehicle is set higher. In order to determine the target gear position at the time of manual downshift among the gear speeds set in the gear shift mode, the gear speed capable of realizing the target deceleration is determined.
The target deceleration during manual downshifting will be changed according to the driver's driving intention, current driving conditions, and driving conditions, and the target gear position during manual downshifting determined based on this target deceleration will also be Realize manual downshift control that matches the driver's driving intention, current driving state, and driving conditions, reflecting the driver's driving intention, current driving state, and driving conditions well. Can do.

Hereinafter, embodiments of the present invention will be described in detail based on examples shown in the drawings.
FIG. 1 shows a control system of an automatic transmission having a manual downshift control device according to an embodiment of the present invention.
1 is an automatic transmission that allows a continuously variable transmission. This automatic transmission 1 has a manual shift mode in addition to the automatic shift mode, and the driver can perform a manual shift by manual operation in the latter mode. Shall.

For this reason, the automatic transmission 1 includes a select lever 2 for selecting a shift mode in the automatic shift mode or instructing a manual shift in the manual shift mode.
The select lever 2 is used for instructing the above-described shift mode of the automatic transmission 1 by manual operation or for instructing manual shift. The select lever 2 penetrates through a vehicle body floor tunnel (not shown) and is positioned near the driver's seat. Assume that manual operation is performed along the operation pattern 3 shown in FIG.

The operation pattern 3 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,
L range position to make automatic transmission 1 low (L) range,
M range position to set automatic transmission 1 to manual shift (M) range,
Manual upshift (M +) position,
Set the manual downshift (M-) position.

P range position, R range position, N range position, D range position, and L range position are arranged in a straight line in this order, and M range position is arranged side by side in D range position.
A manual upshift (M +) position and a manual downshift (in both directions parallel to the arrangement direction of the P range position, R range position, N range position, S range position, and L range position, respectively, across this M range position ( Place the M-) position.
It should be noted that the select lever 2 is self-returned to the M range position when the operation 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,
L range switch 4L which emits L range signal when select lever 2 is in L range position,
M range switch 4m that emits an M range signal when the select lever 2 is in the 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 3.

The select lever position signal from the select lever operation pattern 3 is input to the transmission controller 5.
In addition to these signals, the transmission controller 5 further includes a signal relating to the vehicle speed VSP emitted from the speedometer 7a of the meter panel 7,
A signal from the accelerator opening sensor 8 that detects the accelerator pedal depression amount (accelerator opening) APO,
A signal from the transmission input rotation sensor 9 that detects the transmission input rotation speed Ni,
A signal from the brake stroke speed sensor 10 for detecting the depression speed of the brake pedal is input.

The transmission controller 5 controls the shift of the automatic transmission 1 via the control valve body 1a based on the input information.
In other words, the transmission controller 5
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,
Also,
When the select lever 2 is in the L range position, it receives the L range signal from the switch 4L,
Shift control of the automatic transmission 1 is performed as usual in a shift mode corresponding to the P, R, N, D, and L ranges for the automatic shift mode.

Automatic shift control when the automatic transmission 1 is a continuously variable transmission will be described for forward travel when the select lever 2 is in the forward automatic shift (D) range position and the low (L) range position.
In the D range, the transmission controller 5 determines the target input speed tNi based on the planned shift line map illustrated in FIG. 2 from the vehicle speed VSP detected by the speedometer 7a and the accelerator opening APO detected by the sensor 8. The automatic transmission (continuously variable transmission) 1 is automatically controlled through the control valve body 1a so that the transmission input rotational speed Ni detected by the sensor 9 matches the target input rotational speed tNi.
In this D range, all practical gear ratios in the region between the low-side hardware limit line (low-side limit gear ratio) and the high-side hardware limit line (high-side limit gear ratio) shown by the alternate long and short dash line in FIG. Can be freely selected.

In the above description, the D-range shift control when the automatic transmission 1 is a continuously variable transmission has been described. However, even when the automatic transmission 1 is a stepped automatic transmission, the vehicle speed VSP and the accelerator opening APO are Use
From these, based on a predetermined shift line map for a stepped automatic transmission, a target shift stage suitable for the current operating state is obtained, and from the current shift stage to the target shift stage via the control valve body 1a. Automatic shifting is performed.

Even in the L range, the transmission controller 5 basically obtains the target input speed tNi from the vehicle speed VSP and the accelerator opening APO based on the planned shift line map illustrated in FIG. The automatic transmission (continuously variable transmission) 1 is automatically controlled through the control valve body 1a so as to match the target input rotational speed tNi.
Although not shown in FIG. 2 in this L range, the target input speed tNi in the high side gear ratio area (target input speed tNi in the low speed area) is made unselectable, and in the high side speed ratio area where the selection is disabled Prevent shifting to a low target input speed tNi.

The shift control in the manual shift mode with the select lever 2 in the M range position will be described below.
The transmission controller 5 detects that the manual shift mode has been entered based on the M range signal from the M range switch 4m.

In this manual shift mode, the transmission controller 5 changes the select lever 2 from the M range position to the manual upshift (M +) position every time a manual upshift (M +) signal is generated from the manual upshift switch 4mu. The automatic transmission (continuously variable transmission) 1 is increased by one gear step between a plurality of fixed gear ratio gears (first to fifth gears) set in advance as illustrated in FIG. Shift,
When the manual downshift (M-) signal is generated from the manual downshift switch 4md by moving the select lever 2 from the M range position to the manual downshift (M-) position, the automatic transmission (continuously variable transmission) Machine) 1 is downshifted by one shift step between the manual shift steps (first to fifth) illustrated in FIG.

  In such a manual shift mode, the controller 5 displays the selected shift stage on the selected shift stage display section 11 in the meter panel 7 shown in FIG. 1, and displays a downshift by the downshift lamp 12 in the meter panel 7. The upshift lamp 13 in the meter panel 7 indicates that the upshift is in progress.

In the manual shift mode in which the gear positions for manual shifting (1st to 5th gears) are selected as described above, the gear ratio is fixed for each selected gear position, and the vehicle speed is set to VSP (corresponding to the transmission output speed). On the other hand, the target input speed tNi is set to change in a proportional relationship as shown in FIG.
The transmission controller 5 controls the shift of the automatic transmission (continuously variable transmission) 1 through the control valve body 1a so that the transmission input rotational speed Ni detected by the sensor 9 matches the target input rotational speed tNi.

  Thus, in the manual shift mode in which the gear stage (speed ratio) can be manually selected regardless of the driving state, a request is required when the driver requires a larger driving force than that obtained in the automatic shift (D) range. In addition, the driver's manual shift can satisfy a request such as when the driver needs an engine brake larger than that obtained in the low (L) range.

Hereinafter, manual downshift control according to the gist of the present invention, that is, manual downshift control caused by switching to the manual shift mode during traveling in the automatic shift mode will be described.
When switching the shift mode for manual downshifting, the controller 5 shown in FIG. 1 executes the control program shown in FIG. 4 to determine the target shift speed as described below, and executes the shift to the target shift speed.

The control program in FIG. 4 is started by turning on the ignition switch.
In step S11, the controller 5 switches from the automatic shift mode to the manual shift mode depending on whether the D range signal from the D range switch 4d disappears and the M range signal is output from the M range switch 4m. It is checked whether or not there has been a switching operation, and while there is no such operation, the control is returned to the original, and the process waits while continuing the determination in step S11.

If it is determined in step S11 that there has been a mode switching operation (manual downshift request) from the automatic transmission mode to the manual transmission mode, the control proceeds to step S12, where the vehicle moves depending on whether or not the accelerator opening APO = 0. Check whether the vehicle is coasting (inertia).
If it is determined in step S11 that there has been a mode switching operation from the automatic transmission mode to the manual transmission mode, and if it is determined in step S12 that the coasting (inertia) running state is present, the above-described transmission mode switching is performed for deceleration. It means that the mode is switched by requesting a manual downshift,
Even if it is determined in step S11 that there has been a mode switching operation from the automatic transmission mode to the manual transmission mode, if it is determined in step S12 that the coasting (inertia) driving state has not been reached, the above-described transmission mode switching requests deceleration. This means that there is no mode switching (manual downshift).

Therefore, when it is determined in step S12 that the vehicle is not in the coasting (inertia) running state, in step S13, the target gear position is determined as usual in the following manner.
In other words, in step S13, the gear position on the low gear side closest to the gear ratio in the automatic gear shift mode immediately before the mode change is selected from among the gear positions for the manual gear shift mode (first speed to fifth speed) shown in FIG. Is determined as the target gear position,
In the next step S19, a shift process to the target shift stage is executed.

By the way, when the automatic transmission 1 is a stepped automatic transmission, in step S13, the shift stage that is one speed lower than the currently selected shift stage is determined as the target shift stage,
In the next step S19, a shift process to the target shift stage is executed.

  If it is determined in step S12 that the vehicle is coasting (inertia), the shift mode switching is a mode switch requesting a manual downshift for deceleration. Go ahead and determine the target gear position for manual downshift for deceleration as follows.

  In step S14, the current selected shift speed among the manual shift mode shift speeds (1st to 5th speeds) shown in FIG. 3 based on the current travel state such as the current selected shift speed and the vehicle speed VSP. The vehicle deceleration Gxs (1 to 4) for each manual downshift destination gear stage (first to fourth speeds) when downshifting to a lower speed (low side) gear stage is calculated and estimated.

In the next step S15, refer to the driving ability index that is obtained by indexing the sporty driving degree from the driving tendency of the past driver by a known process such as driving ability adapting control different from the control program of FIG. And
Does this driving performance index indicate a strong degree of sporty driving that exceeds the set value, or is the vehicle deceleration during the manual downshift for deceleration caused by the shift mode change obtained by the differential processing of the vehicle speed VSP greater than the set deceleration? Check whether or not.
The “sporty driving degree” is defined as (i) the number of times the vehicle acceleration is equal to or greater than the predetermined value, (ii) the number of times that the accelerator opening is equal to or greater than the predetermined value, and (iii) the number of times that the accelerator opening speed is equal to or greater than the predetermined value. , (Iv) When the number of times that the brake stroke speed is equal to or greater than the predetermined value is equal to or greater than the predetermined number of times, it may be determined that the sporty running is performed.

If the sporty driving degree is a strong sporty driving degree that is higher than the set value, the vehicle deceleration during the manual downshift for deceleration is higher than the set deceleration value, or if these two conditions are both satisfied, control is performed. The process proceeds from step S15 to step S16.
In step S16,
When it is determined in step S15 that the sporty driving degree is a stronger sporty driving degree than the setting, the stronger the sporty driving degree, the higher the target deceleration Gxo of the vehicle during the manual downshift for deceleration is set,
When it is determined in step S15 that the vehicle deceleration during deceleration manual downshift is equal to or greater than the set deceleration, the vehicle target deceleration Gxo during deceleration manual downshift is set higher as the vehicle deceleration is higher.

In step S15, when it is determined that the sporty driving degree is a strong sporty driving degree that is greater than or equal to the set value, and that the vehicle deceleration during the manual downshift for deceleration is greater than or equal to the set deceleration value,
In step S16, the target deceleration Gxo of the vehicle at the time of the manual downshift for deceleration is set higher as the degree of sporty driving is stronger and the vehicle deceleration at the time of the manual downshift for deceleration is higher.

In step S18, which is selected after setting the vehicle target deceleration Gxo for deceleration manual downshift in this way, this deceleration manual downshift target deceleration Gxo and the manual downshift destination obtained in step S14 are selected. The gear position corresponding to the estimated deceleration value Gxs (1 to 4) closest to the target deceleration Gxo by comparing with the estimated deceleration value Gxs (1 to 4) for each gear position (1st to 4th speeds) (One of the 1st to 4th speeds) is defined as the target gear position for manual downshift for deceleration,
In the next step S19, a shift process to the target shift stage is executed.

In step S15, when it is determined that the sporty driving degree is not a strong sporty driving degree that is higher than the set value, and the vehicle deceleration at the time of manual downshift for deceleration is not higher than the set deceleration value,
In step S17, it is determined whether or not the vehicle is traveling on a downhill road based on the vehicle deceleration that can be obtained from the vehicle speed VSP. If the vehicle is traveling on a downhill road, the deceleration target deceleration Gxo for manual downshift for deceleration is set to zero. .

Next, at step S18, the target deceleration Gxo for deceleration manual downshift Gxo = 0, and the estimated deceleration Gxs (1 for each manual downshift destination gear (first to fourth speeds) obtained at step S14. To 4), the gear position corresponding to the estimated deceleration value Gxs (1 to 4) closest to the target deceleration Gxo = 0 (one of the 1st to 4th speeds) is manually decelerated Set the target gear position for downshift,
Thereafter, in step S19, a shift process to the target shift stage is executed.

According to the manual downshift control of this embodiment described above with reference to FIG. 4, the following operational effects can be obtained.
That is, based on the driving tendency index obtained by indexing the degree of sporty driving from the driving tendency by the past driver, the degree of sporty driving is strong while the degree of sporty driving is equal to or higher than the set level (step S15). The target deceleration Gxo at the time of manual downshift for deceleration is set higher (step S16)
Of the shift speeds set in the manual shift mode (1st speed to 5th speed), the shift speeds (1st speed to 4th speed) that can realize the target deceleration Gxo are set to the target shift speeds for manual downshift for deceleration. (Step S18),
The target deceleration Gxo at the time of manual downshift for deceleration is changed according to the driver's driving intention (sporty driving degree), and the target shift stage at the time of manual downshift for deceleration determined based on this target deceleration Gxo Also, the driver's driving intention (sporty driving degree) is well reflected, and the manual downshift control for deceleration that matches the driving intention (sporting driving degree) of the driver can be realized.

Further, while the vehicle deceleration at the time of manual downshift for deceleration obtained from the change in vehicle speed at the time of manual downshift for deceleration by switching the mode from the automatic transmission mode to the manual transmission mode is equal to or higher than the set deceleration (step S15). The higher the vehicle deceleration during manual downshift, the higher the target deceleration Gxo during deceleration manual downshift (step S16),
Of the shift speeds set in the manual shift mode (1st speed to 5th speed), the shift speeds (1st speed to 4th speed) that can realize the target deceleration Gxo are set to the target shift speeds for manual downshift for deceleration. (Step S18),
The target deceleration Gxo at the time of manual downshift for deceleration is changed according to the current operating state and driving conditions, and the target gear position at the time of manual downshift for deceleration determined based on this target deceleration is also the current operation The state and the running condition are well reflected, and the deceleration manual downshift control that matches the current driving state and the running condition can be realized.

In addition, the fact that the vehicle deceleration is greater than or equal to the set deceleration at the time of manual downshift for deceleration by switching the shift mode means that braking by the driver's brake operation has already started at the time of manual downshift for deceleration. This means that during such braking, engine braking is requested by manual downshift for deceleration by switching the transmission mode.
Therefore, while the vehicle deceleration at the time of manual downshift for deceleration is equal to or higher than the set deceleration as described above, the target deceleration Gxo at the time of manual downshift for deceleration is set higher as the vehicle deceleration at the time of manual downshift for deceleration is higher. Then, the gear position (first speed to fourth speed) capable of realizing the target deceleration Gxo among the shift speeds (first speed to fifth speed) set in the manual shift mode is the target for manual downshift for deceleration. When determining the gear position,
It is possible to realize a manual downshift for deceleration well matched to the driving state and driving conditions by the driver, and it is very advantageous that the downshift to the gear stage desired by the driver can be performed with few operations. .

In addition, according to the above sporty travel degree, the stronger the sporty travel degree, the higher the target deceleration Gxo during deceleration manual downshift,
In accordance with the vehicle deceleration during deceleration manual downshift, the higher the vehicle deceleration during deceleration manual downshift, the higher the target deceleration Gxo during deceleration manual downshift is.
It may be executed individually or in combination, but when used in combination as in the embodiment, both of the above-described effects can be achieved, and the manual downshift for deceleration is intended to be driven by the driver. The current driving state and driving conditions can all be well matched.

By the way, if the sporty running degree is less than the set degree and the vehicle deceleration during deceleration manual downshift is less than the set deceleration (step S15), if the vehicle is traveling on a downhill road, during deceleration manual downshift The target deceleration Gxo is set to zero (step S17)
Of the shift speeds set in the manual shift mode (1st speed to 5th speed), the shift speeds (1st speed to 4th speed) that can realize the target deceleration Gxo = 0 are set for the manual downshift for deceleration. Since the gear position is determined (step S18), the following operational effects can be obtained.

In other words, manual downshift by shifting mode switching while traveling downhill is often performed manually downshifting by shifting the shifting mode in order to maintain the vehicle speed VSP rather than deceleration.
Therefore, according to the control for setting the target deceleration Gxo for deceleration manual downshift to zero during downhill traveling as described above and downshifting to a target gear stage capable of realizing this target deceleration Gxo = 0,
Downshift to the gear stage desired by the driver through the ability to satisfy the above vehicle speed maintenance requirements while traveling on downhill roads, and allowing manual downshifts to better match the driving conditions and driving conditions by the driver Can be carried out with a small number of operations.

1 is a schematic system diagram showing a control system for an automatic transmission including a manual downshift control device according to an embodiment of the present invention. FIG. 2 is an automatic shift control map when the automatic transmission in FIG. 1 is a continuously variable transmission. FIG. 2 is an input / output rotation characteristic diagram showing a relationship between a vehicle speed (output rotation speed) and an input rotation speed for each shift stage when the automatic transmission (continuously variable transmission) in FIG. 1 is in a manual shift mode. 2 is a flowchart showing a manual downshift control program executed by the transmission controller in FIG.

Explanation of symbols

1 Automatic transmission (continuously variable transmission)
1a Control valve body
2 Select lever
3 Select lever operation pattern
5 Transmission controller
7 Meter panel
7a speedometer
8 Accelerator position sensor
9 Transmission input rotation sensor
10 Brake stroke speed sensor
11 Selected gear display
12 Downshift lamp
13 Upshift lamp

Claims (4)

There is a manual shift mode in which a plurality of fixed gear ratios can be manually selected, and when switching from the automatic shift mode to the manual shift mode, one of the shift stages is targeted by a predetermined calculation. In an automatic transmission that is defined as a shift stage and is configured to perform a shift to the target shift stage,
In the predetermined calculation, the driving ability 癖 index obtained by indexing the degree of sporty driving from the driving tendency of the past driver is referred to, and the target of the vehicle increases as the driving ability 癖 index indicates a stronger degree of sporty driving. A manual downshift control device for an automatic transmission, wherein a deceleration is set high, and a shift stage capable of realizing the target deceleration is determined as the target shift stage among the shift stages. There is a manual shift mode in which a plurality of fixed gear ratios can be manually selected, and when switching from the automatic shift mode to the manual shift mode, one of the shift stages is targeted by a predetermined calculation. In an automatic transmission that is defined as a shift stage and is configured to perform a shift to the target shift stage,
In the predetermined calculation, the vehicle deceleration at the time of the mode switching is referred to, and the higher the vehicle deceleration is, the higher the vehicle target deceleration is set. A manual downshift control device for an automatic transmission, characterized in that a shift stage is defined as the target shift stage. There is a manual shift mode in which a plurality of fixed gear ratios can be manually selected, and when switching from the automatic shift mode to the manual shift mode, one of the shift stages is targeted by a predetermined calculation. In an automatic transmission that is defined as a shift stage and is configured to perform a shift to the target shift stage,
In the predetermined calculation, with reference to the driving tendency index determined by indexing the degree of sporty driving from the driving tendency by the past driver, and the vehicle deceleration at the time of the mode switching, this driving ability index is The higher the vehicle deceleration and the higher the vehicle deceleration, the higher the target deceleration of the vehicle, and the shift speed that can achieve the target deceleration is determined as the target shift speed. A manual downshift control device for an automatic transmission, characterized in that it is configured as described above. In the manual downshift control device according to claim 3,
When the drivability index indicates a weak sporty driving degree less than a set value, and the vehicle deceleration at the time of mode switching is less than a set value, if the vehicle is running on a downhill road, the target deceleration of the vehicle is reduced to zero. A manual downshift control device for an automatic transmission, characterized in that a shift stage capable of realizing the target deceleration zero is defined as the target shift stage among the shift stages.

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