JP3446443B2 - Transmission control device for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a transmission for an automatic transmission.
Transmission control, especially with manual mode
It is related to improvement of the control device. [0002] 2. Description of the Related Art Shift control of an automatic transmission used in a vehicle
In the device, the vehicle speed VSP and the throttle opening TVO (or
Target speed ratio i * according to operating conditions such as accelerator opening).
In addition to the automatic shifting mode to be determined, the conventional manual type
As in the case of a transmission, a predetermined gear ratio
Manual mode that can be selected according to the shifting operation of the driver
Some are known, for example,
There is one disclosed in Japanese Patent No. 26847. This employs a continuously variable transmission as an automatic transmission.
The shift lever in manual mode.
The gear ratio of the continuously variable transmission is set according to the shift position,
Regardless of the vehicle speed VSP or throttle opening TVO, the driver
Indicates that a desired gear ratio can be selected. In addition, the quarterly “MOVE 1995 SPR
ING 01 ”(From April 28, 1995, Yamaei Shobo
Line) page 123, page 128, one shift
Selectable between automatic shift mode and manual mode with lever
Switching is also known. [0005] As shown in FIG.
Shift lever 5 as manual mode
The switch 5A has an UP switch 8 and a DOWN switch 9
Are provided, and the relative position is changed according to the operation of the shift lever 5.
In the past, it was known that the target gear ratio i * was changed.
Shift lever from automatic transmission mode "D" to the left side in the figure.
5 is operated in the same manner as a conventional manual transmission.
In the new mode, shift lever 5 is set to the “+” side in the figure.
Press to turn on the UP switch 8 and upshift
While the shift lever 5 is similarly pushed to the “−” side.
DOWN switch 9 will turn ON and downshift
Command and relative to the current gear ratio (or shift position).
The gear ratio is automatically changed, and such gear shifting control is
Below, it is a sequential shift. In the figure, "P",
"R" and "N" are parking, reverse, and new, respectively.
Indicates a tral. Further, a continuously variable speed ratio can be continuously changed.
The shift control device of the transmission also adds to the automatic shift mode.
However, in manual mode,
A char shift can be easily realized.
As shown in FIG. 14, the number of gears in the manual mode is six.
And the gear ratio i according to each gear stage GP = 1 to 6
(1) to i (6) are set in advance, and a system as shown in FIG.
UP switch 8 or DOWN switch 9 of the left lever 5
The gear ratio i (n) is relatively sequentially switched in accordance with the operation of
The same shifting operation as a manual transmission can be performed.
it can. [0007] SUMMARY OF THE INVENTION By the way, automatic transmissions
In manual mode, the shifting speed and shifting shock are
There is an opposite relationship, and the shift shock given to the driver and the passenger
Gear speed must be set so that the
There is a shift shock on mountain roads with continuous corners
Although a large gear may require a quick shift,
When cruising on highways, etc.
Kana shifting may be required, driving conditions and driver
The shifting speed changes according to preference. [0008] However, in the automatic transmission as described above,
Shift control device shifts the shift lever to manual mode
If you perform a downshift or upshift by operating
Since the shift speed is set to a predetermined value,
Shifting speeds that meet the driving conditions
Driving like a manual transmission
In some cases, the shift cannot be performed in accordance with the shift operation of the driver. The present invention has been made in view of the above problems.
Automatic transmission that sequentially changes the gear ratio relatively
In manual mode, the gear changes according to the driver's gear change operation.
To provide a shift control device of an automatic transmission capable of changing a speed.
The purpose is to: [0010] The first invention is shown in FIG.
As shown, the automatic transmission mode of the automatic transmission 60 and the manual
Transmission mode switching means for selectively switching between the transmission mode and the transmission mode
61, up when the manual mode is selected
Manual shift instructing means 6 for instructing shift or downshift
2 and the shift mode switching means 61 is a manual mode
In response to the command from the manual shift command means 62,
The set value of the gear stage GP is changed to a plurality of gear stages set in advance.
Of these, change to the adjacent gear relatively,
Gear ratio i of the automatic transmission 60 according to the gear stage GP of
Shifting of an automatic transmission having a shifting control means 63 for changing
In the control device, the manual shift commanding means 62
First shift instructing means 62 for shifting at the shift speed Δi1
A and a second change speed greater than the first speed change Δi1.
Second speed change command means 62B for performing speed change at speed i2
When, Depending on the operation frequency of the second shift commanding means 62B.
Learning control means 65 for learning and correcting the first shift speed Δi1
Is provided. [0011] [0012] [0013] [0014] Therefore, the first aspect of the present invention is a manual mode.
Is upshifted or downed by manual shift command means.
Gear shift to change the gear setting to the next gear.
The manual shift command means can be changed first and second.
And the second shift command means, the first shift
Arbitrary change at a predetermined first shift speed by operation of the command means.
While performing the speed change operation to the speed, the second speed change command means is operated.
In this case, the second shift speed is set to be larger than the first shift speed.
As a result, quick gear shifting operations can be performed,
The shift speed can be changed according to the preference of the diver. [0015] [0016] [0017]AndResponds to the frequency of operation of the second shift command means.
In order to learn and correct the first shift speed Δi1,
Set the speed to a value according to the driving situation and the driver's preference.
Frequent operation of the second speed change command means can be reduced.
You. [0018] Embodiments of the present invention will be described below with reference to the accompanying drawings.
Will be described. FIG. 1 shows a manual transmission in addition to the automatic transmission mode.
The automatic transmission 1 provided with the
The continuously variable transmission 10 includes, for example, two
Continuous gear ratio according to the tilt angle of power rollers 18 and 20
It is composed of a toroidal type that can be changed dynamically. The automatic transmission 1 has a shift control controller.
The transmission ratio of the continuously variable transmission 10 is controlled in accordance with a command from
And a hydraulic control device 4 for controlling the hydraulic pressure. The continuously variable transmission 10 includes an engine and a torque converter.
When the forward / reverse switching device 40 is interposed between the barter 12 and
In addition, the hydraulic pressure supplied from the hydraulic pump 84 is hydraulically controlled.
The gear ratio is changed by controlling with the device 4.
is there. The torque converter 12 is arranged as a starting element.
It is a lock that is not shown above a predetermined speed
The up (LU) clutch operates and the engine and the stepless change
The input shaft of the speed unit 10 is directly connected. The hydraulic control device 4 of the automatic transmission 1
Transmission control control mainly composed of microcomputer
And a step motor 61 driven by the roller 2. The shift control controller 2 controls the engine control.
The engine speed Ne input from the controller 3 and
Throttle opening TVO and shift lever 5 selector
The selector position from the switch 5A and the
Input shaft rotation sensor 6 and output shaft rotation sensor 7
The input shaft speed Nin and the output shaft speed Nout (= vehicle speed)
VSP), depending on the driving condition of the vehicle.
The calculated target gear ratio i * is calculated. The output shaft rotation sensor
7 functions as a vehicle speed sensor for detecting the vehicle speed VSP,
The speed change controller 2 sets the output shaft speed Nout to a predetermined value.
The vehicle speed VSP is calculated by multiplying by a constant. Then, the shift control controller 2 calculates
Step of hydraulic control device 4 based on target gear ratio i *
The drive motor 61 drives the toroidal-type continuously variable transmission 1
The tilt angle of the power rollers 18 and 20 at 0 is the target gear ratio I *
Is driven so as to coincide with. Here, the shift control controller 2 is configured as shown in FIG.
As shown in FIG.
And a RAM 51 and a ROM 52 as storage means.
And a slot from the engine control controller 3.
A / D converter 53 for reading torque opening TVO, same
The engine speed N from the engine controller 3
e, the rotation speeds Nin and Nout of the input and output shafts of the continuously variable transmission 10
(= VSP) counter 54, shift lever 5
Digital I that reads signals from the selector switch 5A
/ O55, and the step motor 6 of the hydraulic control device 4
1 is driven by a digital I / O 56. Here, the ROM of the shift control controller 2
The storage means such as 52 includes an automatic transmission mode and a manual mode.
Multiple shift maps corresponding to the two shift modes
They are stored in advance and correspond to these shift modes.
Therefore, the selector switch 5A of the shift lever 5 is shown in FIG.
As shown, an "H" type gate similar to that of the conventional example is provided.
In addition to the automatic transmission mode "D" range,
Shift mode switcher that selects either shifting or manual shifting
With manual mode changeover switch 13 as a step
In manual mode, the front and rear of the shift lever 5
Direction (vertical direction in FIG. 4)
UP shift as manual shift command means for changing the gear position
A switch 8 and a DOWN switch 9 are provided. Here, the transmission control controller 2 is updated.
The UP switch 8 for instructing the shift is as shown in FIG.
Second, the shift lever 5 is turned on by a predetermined stroke.
Move the 1UP switch 8A and the shift lever 5
Equipped with a second UP switch 8B that turns on when
These switches are provided on the shift lever 5 side.
-5B and 5C are brought into electrical conduction by sliding contact.
You. Similarly, the transmission control controller 2
The DOWN switch 9 for commanding the shift is also shown in FIG.
As shown, the shift lever 5 is turned on at a predetermined stroke.
The first DOWN switch 9A, and the shift lever
2nd DOWN that turns ON when -5 is stroked
A switch 9B is provided, similar to the UP switch 8 described above.
These switches are shoes 5 provided on the shift lever 5 side.
By making sliding contact with B and 5C, they become electrically conductive. What
Note that the first UP switch 8A and the first DOWN switch 9A
Respectively correspond to the first speed change command means and the second UP switch 8.
B, the second DOWN switch 9B is the second shift command.
Configure means. Then, the system operated to the manual mode
The lift lever 5 is moved by an elastic member (not shown) as shown in FIG.
Is constantly biased toward the neutral state shown in FIG.
Switch 8A or the first DOWN switch 9A.
When the shift lever 5 is stroked, the shift lever 5
The applied reaction force increases, and furthermore, the first UP switch 8A or
Or after the first DOWN switch 9A is turned on.
And a second UP switch 8B or a second DOWN switch.
When the shift lever 5 is stroked toward 9B,
Set so that the reaction force applied to the left lever 5 further increases
The increase in the reaction force is set almost stepwise.
The driver determines, based on the magnitude of the reaction force applied to the shift lever 5
From the first UP switch 8A to the second UP switch 8B.
Can be recognized as being sequentially turned on, and the DOWN switch 9 can be recognized.
The same applies to. Note that the displacement of the shift lever 5
The reaction force generating means for applying a stepwise reaction force in accordance with
It is made of an elastic body such as a spring. The gear position in the manual mode is shown in FIG.
4 as in the prior art shown in FIG.
Is set in advance, and here, the same as the above-described conventional example.
The figure shows a case where the vehicle is composed of six gear stages GP.
The shift map of the mode is such that each of the first to sixth speeds GP = 1
Predetermined gear ratios i (1) to i (6) corresponding to
These gear ratios i (n) are adjusted in response to an increase in the gear position.
On the Hi side, that is, the gear ratio is set to decrease.
It is. On the other hand, when the shift lever 5
When the dynamic transmission mode is selected, the conventional automatic transmission
As with the shift control device, the vehicle speed VSP and the throttle opening T
A shift map (not shown) corresponding to VO (or accelerator opening)
Automatic transmission mode in which the target transmission ratio i * is determined by
Become. Here, the outline of the control in this embodiment is described.
Is output from the transmission control controller 2 as shown in FIG.
The vehicle speed VSP based on the signal Nout from the shaft rotation sensor 7,
Throttle opening sensor 30 of engine control controller 3
Throttle opening TVO from the selector switch 5A
The speed change mode detected from the manual mode changeover switch 13
Mode, UP switch 8 of selector switch 5A or D
The signal from the OWN switch 9 (the first UP switch 8A,
1st DOWN switch 9A or 2nd UP switch 8
B, using the second DOWN switch 9B) as an input,
A predetermined pulse is output to the step motor 61 of the transmission 1.
Things. The manual mode changeover switch 13
As shown in FIG. 4, the right-side automatic shift mode and the
In the middle of the "H" gate connecting the manual mode
Provided. Next, the operation is performed by the transmission control controller 2.
An example of the control is shown in the flowcharts of FIGS.
This will be described in detail with reference to flowcharts. Each file
The chart is displayed every predetermined time, for example, every 10 msec.
Is executed. In step S1 of FIG.
It reads the data and detects the driving state of the vehicle.
Engine speed Ne, throttle opening TVO engine
While reading from the controller 3, the automatic transmission
The input shaft rotation speed Nin and the output shaft rotation speed Nout (vehicle speed
VSP) and the selector switch 5A of the shift lever 5
And signals from the UP switch 8 and DOWN switch 9
See in. Then, in step S2, the selector switch
Signal of the manual mode changeover switch 13 of the switch 5A.
Reads the current shift position and changes it to manual mode.
It is determined which of the dynamic shift modes is in effect.
And the shift lever 5 is operated to the left in the figure.
If it is the mode, the process proceeds to step S3, while the automatic transmission mode
If it is the mode, the process proceeds to step S4, and the vehicle
Target speed ratio i according to speed VSP and throttle opening TVO
Set *. On the other hand, the manual performed in step S3
The mode shift control is performed in steps S10 to S19 shown in FIG.
This manual is described below.
The shift control in the Al mode will be described in detail. First, in step S10, the shift lever
5 is operated to the upshift side and the first UP switch 8A
Has changed from OFF to ON (signal rise)
Is determined, and the shift lever 5 is
If the 1UP switch 8A is ON, the process proceeds to step S11.
Proceeding to the process, 1 is added to the gear position GP in the manual mode.
Then, the target gear stage GP is increased. On the other hand, in step S12, the shift lever
5 is operated to the downshift side and the first DOWN switch
9A changed from OFF to ON?
The first DOWN switch 9A is ON.
If the process proceeds to step S13,
Subtract 1 from gear position GP to subtract target gear position GP
You. In this embodiment, although not shown,
The minimum value of the gear stage GP is regulated to 1, and the maximum value is regulated to 6.
It is. Then, at step S14, step S
Target change according to the gear stage GP set in step S11 or S13.
Determine the speed ratio i *. After the target gear stage GP is determined in this way,
In step S15, the shift lever 5 is further upshifted.
The second UP switch 8B is turned ON
It is determined whether or not the driver has turned on.
It is determined that a shift has been requested, and the process proceeds to step S16.
No. On the other hand, when the second UP switch 8B is OFF
If so, the process proceeds to step S17, and the shift lever 5 is further moved.
Stroke to the downshift side and make the 2nd DOWN switch
Judge whether 9B is ON, and if ON, run
Determines that a quick downshift has been requested by the
Proceed to step S18. In the determinations in steps S17 and S19, the second U
P switch 8B and DOWN switch 9B are both OFF
If so, the process proceeds to step S19, where the target shift speed Δi
* Represents the first shift speed Δi1 corresponding to the normal shift operation.
Set. The first shift speed Δi1 is, for example,
Gear speed is set to a certain
It is. On the other hand, in the judgments of steps S17 and S19,
2 of the UP switch 8B and the DOWN switch 9B
If either one of them is turned on,
In order to perform a shift or downshift, step S16,
In step 18, the second shift speed Δi2 is set to the target shift speed Δi *.
Is determined. The second shift speed Δi2 is the same as the first shift speed.
It is set to a predetermined value greater than the speed Δi1, for example,
A predetermined value that enables quick shifting regardless of shifting shock
Is set to Thus, the manual operation of the automatic continuously variable transmission 1 is performed.
In shift mode, the target shift is performed according to the operation of the shift lever 5.
The ratio i * and the target shift speed Δi * are set, and the main routine shown in FIG.
Return to the routine. Then, in step S5 in FIG.
The actual speed ratio of the speed change gear 10 matches the target speed ratio i *.
When the target gear speed Δi *
Drive the tutor. As described above, the manual of the automatic transmission 1
Gear ratio (gear stage) is changed sequentially
UP switch 8 and DOWN switch
Switch 9 is connected to a first switch (first UP switch).
8A and the first DOWN switch 9A. Hereinafter, simply the first
Switch. ) And the second switch (the second UP switch).
H 8B, 2nd DOWN switch 9B. Hereinafter, simply the second
Switch. ) And only the first switch
When it is ON, the first shift speed, which is the normal shift speed
Gear shift when changing gears depending on the degree Δi1.
The gears are shifted smoothly while suppressing the
When the second switch is turned on in addition to the switch, the first change is made.
With the second shift speed Δi2 which is higher than the speed Δi1,
It is possible to switch gears quickly,
Changing the shift speed Δi according to conditions or driver's preference
It has a manual mode compared to the previous example.
Operability of the automatic transmission can be improved.
You. Then, the shift lever 5
The first switch and the second switch are sequentially set according to the size.
And the shift lever 5
The reaction force urging to the neutral position shown in FIG.
The reaction force when turning on the first switch is turned on.
The driver has shifted
From the reaction force applied to the lever 5, the first or second switch can be easily formed.
It can recognize the operation state of the switch (= shift speed)
The operability of an automatic transmission equipped with a manual mode.
It can be further improved. Further, a shift command in the manual mode is issued.
The UP switch 8 and the DOWN switch 9
And the second switch, one of the switches
Switch of the first or second switch
On the other hand, it can shift gears, manual for automatic transmission
Mode reliability can be improved. FIGS. 9 to 12 show a second embodiment.
The learning control is added to the manual mode control of the first embodiment.
Other configurations are the same as those in the first embodiment.
is there. In the first embodiment, the first UP switch
When only 8A or the first DOWN switch 9A is turned on
The first shift speed Δi1 during the upshift and downshift.
While the shift side is set to the same shift speed Δi1,
In the embodiment, as in steps S20 and S21 in FIG.
The first shift speed on the upshift side is set to Δi1u,
Set the first shift speed on the shift side as Δi1d
I do. These first shift speeds Δi1u, Δi1d
As shown in the flowcharts of FIGS.
Operation of the 2UP switch 8B and the second DOWN switch 9B
It is calculated as a learning correction value based on frequency. First, the second UP switch 8B and the second DOW
The operation frequency of the N switch 9B is shown in the flowchart of FIG.
It is performed based on. In step S30, the second UP switch 8B
Is determined to have changed from OFF to ON, the step
In S31, the current timer count Timer and the last timer
Difference from timer count TMold1 when it reaches N
As a variable Tdata1. Tdata1 = Timer-TMold1 However, the count Timer of the timer is shown in FIG.
Is incremented at predetermined time intervals.
You. Then, in step S32, the current timer
Of the previous timer TMo on the upshift side
ld1 and then the second UP switch in step S36.
The operation frequency Hindo1 of the switch 8B is obtained by the following equation. Hindo1 = 1 / Tdata1 On the other hand, the second DOWN switch 9B changes from OFF to ON.
If it is determined that the current timer has been
Count Timer and the previous second DOWN switch 9
Timer count TMold2 when B turns ON
Is obtained as a variable Tdata2. Tdata2 = Timer-TMold2 Then, similarly to the above, in step S35, the current timer
Of the previous timer TMo on the downshift side
ld2, and the second DOWN in step S36.
The operation frequency Hindo2 of the switch 9B is obtained by the following equation.
You. Hindo2 = 1 / Tdata2 In the flowchart of FIG. 11, the flowchart of FIG.
Second UP or DOWN switch 8B, 9 determined by
The first shift is performed based on the operation frequency Hindo1, 2 of B.
The learning correction of the speeds Δi1u and Δi1d is performed. In step S40, the operation frequency Hindo
The first shift speed Δi1u on the upshift side from 1 is expressed by the following equation.
Find more. [0064] Δi1u = Δi10 + K × Hindo1 Here, Δi10 is a predetermined reference value of the first shift speed, and K is
This is a predetermined constant. Then, in step S41, this upsizing is performed.
Shift-side first speed change speed Δi1u is a predetermined maximum value Δi1u
_maxJudge whether or not it exceeds
In step S42, the maximum value Δi1u_maxTo the first shift speed Δi
Set as 1u. Therefore, the first shift speed on the upshift side is
The degree Δi1u indicates that the operation frequency of the second UP switch 8B is large.
And a predetermined maximum value Δi1u_maxWithin
Is set to be On the other hand, in steps S43 to S45,
The first shift speed Δi1d on the shift side is the same as above.
Learning correction is performed, and is determined by the flowchart of FIG.
On the basis of the operation frequency Hindo2, the
The first shift speed Δi1d is controlled by operating the second DOWN switch 9B.
It increases as the cropping frequency increases, and a predetermined maximum value Δi
1d_maxIt is set to be within. Thus, according to the operation frequency of the second switch,
The first shift speed Δi on the upshift and downshift sides
1u and Δi1d are learned and corrected, respectively.
The first shift speeds Δi1u and Δi1d can be changed according to circumstances.
The first shift speed on the upshift side and the downshift side.
Independent gear shifting according to driving conditions and driver preference
The speed can be set more finely. That is, the driver operates the shift lever 5
Then, simply turning on the first switch slows down the shifting speed.
If you feel that
Switch to turn on the second switch.
The first shift speed Δi
1d and Δi1u are respectively increased by the learning correction.
Operate the shift lever 5 to turn on the first switch.
The gearshift speed desired by the driver can be set simply by
Do not stroke the shift lever 5 to the switch
More rapid changes with shorter shifting strokes
Speed operation and a manual mode
Operability of the automatic transmission
You. In the above embodiment, the manual
Changeover switch 13, UP switch 8, DOWN switch
9 shows an example in which the shift lever 5 is operated according to the displacement of the shift lever 5.
However, although not shown, these switches are
Tearing column or instrument panel
Etc. can also be arranged. In the above embodiment, the automatic transmission 1
Although the case where it is constituted by the continuously variable transmission 10 is shown,
The same applies to an automatic transmission composed of planetary gears.
Functions and effects can be obtained. [0072] As described above, the first aspect of the present invention is a manifold.
In the manual mode, the upshift is performed by the manual shift command means.
Shift or downshift to change the gear
The gear can be changed relatively to the matching gear,
Command means comprising the first and second shift command means.
As a result, a predetermined first shift is performed by operating the first shift instructing means.
While performing a shift operation to an arbitrary shift speed at the speed, the second shift finger
When the command means is operated, it is larger than the first speed change speed.
A quick shift operation can be performed by the second shift speed.
Change the gear shifting speed according to the driving situation and the driver's preference.
Automatic mode with manual mode
The operability of the transmission is improved, and the first or second shift is improved.
Even if the speed command means breaks down, the other
Manual mode is provided for quick operation.
It is also possible to improve the reliability of automatic transmissions
You. [0073] [0074] [0075]AndResponds to the frequency of operation of the second shift command means.
In order to learn and correct the first shift speed Δi1,
Set the speed to a value according to the driving situation and the driver's preference.
Frequent operation of the second speed change command means to reduce
A fast shifting operation can be realized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an automatic transmission according to an embodiment of the present invention. FIG. 2 is a block diagram showing details of a shift control controller. FIG. 3 is a conceptual diagram of shift control in a manual mode. FIG. 4 is a plan view of a shift lever and a select switch. FIG. 5 is also a shift lever, an UP switch, and a DOWN
It is a side view of a switch. FIG. 6 shows the stroke of the shift lever and the first and second U
It is a graph which shows the relationship of the operation state of a P or DOWN switch, and the relationship of a reaction force. FIG. 7 is a flowchart illustrating an example of control performed by a shift control controller, and illustrates a main routine. FIG. 8 is a flowchart showing a subroutine of manual mode control. FIG. 9 is a flowchart illustrating a subroutine of manual mode control according to the second embodiment. FIG. 10 is a flowchart showing a learning process of the operation frequency of the second UP or DOWN switch. FIG. 11 is a flowchart showing a learning correction process of a first shift speed. FIG. 12 is a flowchart illustrating a timer process. FIG. 13 is a plan view of a shift lever and a select switch of a conventional automatic transmission. FIG. 14 is a shift map showing a manual mode of the continuously variable transmission, showing a relationship between a target input shaft rotation speed and a vehicle speed. FIG. 15 is a claim correspondence diagram corresponding to any one of the first to fourth inventions. [Description of Signs] 2 Shift control controller 3 Engine control controller 4 Hydraulic controller 5 Shift lever 8 UP switch 8A First UP switch 8B Second UP switch 9 DOWN switch 9A First DOWN switch 9B Second DOWN switch 10 Continuously variable transmission 13 Manual switching Switch 50 CPU 51 RAM 52 ROM 53 A / D 54 Counter 55, 56 Digital IO 60 Automatic transmission 61 Shift mode switching means 62 Manual shift command means 62A First shift command means 62B Second shift command means 63 Shift control means 64 Force generation means 65 Learning control means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-322022 (JP, A) JP-A-7-301321 (JP, A) JP-A-6-257665 (JP, A) JP-A-7-301 127718 (JP, A) JP-A-6-323420 (JP, A) JP-A-9-137860 (JP, A) JP-A-6-68113 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16H 59/00-63/48

Claims (1)

(57) [Claim 1] Shift mode switching means for selectively switching between an automatic shift mode and a manual mode of an automatic transmission, and upshift or downshift when the manual mode is selected. A manual shift commanding means for instructing, and when the shift mode switching means is in a manual mode, changing a set value of a shift speed in accordance with a command from the manual shift commanding means among a plurality of preset shift speeds. And a shift control unit that changes the gear ratio of the automatic transmission in accordance with the shift stage. The manual shift command unit includes: a first shift command means for performing speed shifting speed of the second shift command means for performing transmission with a large second shift speed than the first shift speed, the second speed change The first speed change according to the operation frequency of the command means;
A shift control device for an automatic transmission , comprising: learning control means for learning and correcting the speed .