JP3424447B2 - Control device for automatic transmission - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an automatic transmission capable of performing so-called automatic gear shifting based on a running state of a vehicle and so-called manual gear shifting based on a manual operation.

[0002]

2. Description of the Related Art The present applicants have already proposed an automatic transmission of this type by Japanese Patent Laid-Open No. 172225/1993. This automatic transmission is premised on an automatic transmission configured to electrically control a shift solenoid valve to output a signal pressure, and switch the shift valve according to the signal pressure to execute a shift. In addition to outputting electrical signals to the valve based on running conditions such as throttle opening and vehicle speed, a predetermined switch is operated based on manual operation to output a signal for shifting to the shift solenoid valve. It is configured.

More specifically, the shift positions for setting the range in the automatic speed change mode are linearly arranged, and the shift device is provided with linear grooves for guiding the shift lever to these range positions. In addition, the gear position for setting the gear in the manual gear shift mode is arranged at the four vertices of a rectangle, and an H-shaped groove for guiding the shift lever to these gear positions intersects the linear groove at its drive range position. Is formed on the shift device. Further, a switch operated by a shift lever is arranged at each gear position.

In the above automatic transmission, the shift lever is set to H
When the switch is moved to the shaped groove and the switch at the predetermined gear position is operated, the electronic control unit normally outputs the gear shift signal so as to set the corresponding gear based on the signal output from the switch. . However, since such a manual shift operation is based on an arbitrary operation by the driver, there are cases where the shift speed is mechanically unacceptable. For example, if a manual operation is performed to downshift to a low-medium speed stage while traveling at high speed, each gear stage in the manual shift mode is a gear stage where the engine brake works (Over revolution) may occur. In the above conventional automatic transmission, in such a case,
It is configured to prohibit the achievement of the instructed shift speed by the manual operation, and at the same time, blink the display to notify that the actual shift position and the shift lever position are different.

[0005]

However, in the above-described conventional automatic transmission, if the shift lever is set to a predetermined gear position in the manual gear shift mode, the gear shift is performed while the shift lever is in the gear position. As long as the gear signal continues to be output and the state in which the setting of the gear is prohibited due to engine overrevolution or the like continues, the notification by the display is continued. On the other hand, as a format for selecting a shift stage by a manual operation in an automatic transmission, there is known a format using a switch such as a momentary switch that outputs a signal at a moment when the gear is turned on. In an automatic transmission of this type capable of manual shifting, there is a shift prohibition condition such as that the state of the vehicle such as the vehicle speed at the time of performing the shift operation in the manual shift mode is incompatible with the shift stage instructed to shift. If the condition is satisfied, it means that the shift speed selected by the manual operation is not achieved and the shift instruction is substantially canceled.

In such a case, the shift in the manual shift mode is not executed unless the shift instruction is manually given again. Contrary to this, however, if the switch operation is continued, the shift signal is substantially continuously output even if the switch is a momentary switch. Sometimes. That is, there is a possibility that the driver may feel uncomfortable because the gear shifting may or may not be performed depending on the manner of the manual gear shifting operation, and the agreement / disagreement between the driver's manual operation and the achievement of the gear stage may not be unified. It was Similarly, the operation of a means such as a lamp for notifying the disagreement between the shift speed designated by the manual operation and the actual shift speed,
There was a possibility that they would not necessarily be unified.

The present invention has been made in view of the above circumstances, and there is a discrepancy between the instruction operation and the actual operation when the switching operation based on the instruction to switch the gear stage or the gear range by the manual operation is not achieved. It is an object of the present invention to provide a control device for an automatic transmission that causes less discomfort due to notification or the like.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 issues a switching instruction of a shift stage or a shift range based on a manual operation, and a predetermined condition. In the control device of the automatic transmission that does not switch the gear shift or the gear range when the above condition is not satisfied, the manual operation detecting means for detecting a shift instruction of the gear stage or the gear range based on the manual operation, and the manual operation detecting means. Switching instruction holding means for holding the switching instruction state for a predetermined time when a switching operation based on the instruction is not executed after detecting that an instruction to switch the shift stage or the shift range based on the manual operation is given; When the predetermined condition is satisfied within a predetermined time, the gear stage or the gear range based on the manual operation And it is characterized in that it comprises a change-executing means for executing the switching of.

Therefore, according to the first aspect of the invention, when a shift instruction such as a gear position or a shift range is given by a manual operation, the change instruction state continues for a predetermined time. In that case, at the time when the switching instruction based on the manual operation is performed, if the switching to the instructed shift stage or shift range cannot be executed, that is, if the predetermined condition is not satisfied, the switching instruction operation is performed. At the same time, the shift stage or shift range is not switched, but if the predetermined condition is satisfied while the shift instruction state continues, the shift to the shift stage or shift range instructed based on the manual operation is performed. To be executed. That is, even if the switching instruction operation is performed within a short period of time, since the switching instruction state continues for a long time to some extent, the determination of the switchable state (establishment of the predetermined condition) by the driver is small in timing. Even if there is a shift, the shift or shift of the shift range is executed by satisfying the condition while the switching instruction state is continued. In other words, even if a switching instruction is issued using a device that outputs a signal such as a momentary switch in a short time, a timing margin for the switching instruction is secured and the switching instruction is immediately rejected or Since it is not canceled, it is possible to prevent or suppress the uncomfortable feeling due to the non-execution of the shift or the shift range based on the manual operation.

The invention according to claim 2 is capable of outputting a switching instruction signal of a shift stage or a shift range by a manual operation, and when a predetermined condition is not satisfied, a switching instruction based on the manual operation. In a control device for an automatic transmission notifying that a signal is not executed, a manual switching detection means for detecting that an instruction to switch a shift stage or a shift range based on the manual operation has been made,
As manual operation and notifying means for notifying that the switching operation that is based is not performed, before Symbol switching operation switching based on over operation is real
After the switching instruction based on the manual operation is completed without being performed
For a predetermined time even it is characterized in that it comprises a notification holding means for continuing a notification by the pre-Symbol notification means.

Therefore, in the inventions of claims 2 to 4 ,
When an instruction to change the gear or shift range based on a manual operation is given and the specified change operation is not executed because the conditions for executing the change are not satisfied, such instruction content and actual The notification means announces the difference from the operation. The announcement states, after the switching instruction has been completed
Also Tokoro Ordinary course of an in, to continue. Therefore, even if the switching instruction by manual operation has long and short variations due to individual differences among drivers, the end of the notification that the operating state different from the switching instruction is set by the switching instruction by manual operation. one unified be in a certain period of time from the end point
As it can be Rukoto, timing and duration of the announcements, it is possible to prevent or suppress the discomfort caused by such variations depending on the situation.

[0012]

The invention DETAILED DESCRIPTION OF THE INVENTION One Giniko will be described with reference to the drawings more specifically. First, the overall control system will be described. FIG. 3 shows a control system diagram for the engine 1 and the automatic transmission 2, and a signal corresponding to the depression amount of the accelerator pedal 3 is sent to the engine electronic control unit 4. It has been entered. An electronic throttle valve 6 driven by a throttle actuator 5 is provided in the intake pipe of the engine 1. A control signal is output from the control device 4 to the throttle actuator 5 according to the depression amount of the accelerator pedal 3, and the opening degree of the electronic throttle valve 6 is controlled according to the control amount.

The electronic control unit 4 for controlling the engine 1 includes a central processing unit (CPU) and a storage unit (R).
(AM, ROM) and an input / output interface, and the electronic control unit 4 includes a signal according to the depression amount of the accelerator pedal 3,
Output signal of engine speed sensor 7, output signal of intake air amount center (air flow meter) 8, output signal of intake air temperature sensor 9, output signal of throttle opening sensor 10, output signal of vehicle speed sensor 11, cooling water Temperature sensor 1
The output signal of 2 and the output signal of the brake switch 13 are input as control data. In addition to the control of the throttle actuator 5, the electronic control unit 4 for the engine outputs a signal to the fuel injection device 14 and the igniter 15 that changes the ignition timing for torque control during gear shifting. It is configured.

The automatic transmission 2 connected to the engine 1 is a so-called electronically controlled automatic transmission that electrically controls hydraulic pressure to control gear shifting and engagement / disengagement of a lockup clutch. The hydraulic control circuit 16 for controlling the hydraulic pressure mainly controls the three shift solenoid valves SOL1, SOL2, SOL3 for executing the shift, the linear solenoid valve SLU for mainly controlling the lockup clutch, and the throttle opening. A linear solenoid valve SLT that controls the line pressure and a linear solenoid valve SLN that mainly controls the back pressure of the accumulator are provided.

An electronic control unit 17 for an automatic transmission that outputs a control signal to each solenoid valve in the hydraulic control circuit 16 is provided. The electronic control unit 17 for the automatic transmission has a central processing unit (CPU) and a storage unit (RA) like the electronic control unit 4 for the engine described above.
(M, ROM) and an input / output interface, and therefore can be integrated / integrated with the engine electronic control unit 4 as required. The electronic control unit 17 for an automatic transmission performs a calculation based on input data according to a map or a calculation formula stored in advance, and outputs a control signal based on the calculation result to each solenoid valve to shift or lock up. It is configured to execute clutch engagement / disengagement control, transient hydraulic pressure control during gear shifting, and the like.

The electronic control unit 17 for the automatic transmission is provided with the above-mentioned throttle opening sensor 1 as control data.
0 output signal, vehicle speed sensor 11 output signal, cooling water temperature sensor 12 output signal, brake switch 13 output signal, as well as a shift position sensor 19 provided in the shift device 18, a torque converter described later. Signal from the turbine speed sensor 20, a signal from the kick down switch 21 that is turned on when the accelerator pedal 3 is fully depressed, a signal from the sports mode switch 22 that sets the manual shift mode, and a manual shift mode Plus (+) switch 23 to instruct shift
Signal from the minus (-) switch 24 for instructing a downshift in the manual shift mode. Further, the electronic control unit 17 for the automatic transmission has an indicator 25 such as a lamp or an LED (light emitting diode).
Is connected, the indicator 25 indicates the set shift speed, non-execution of shift or manual / automatic shift mode.
The driver is notified by lighting or blinking.

The electronic control units 4 and 17 are connected to each other so as to be able to perform data communication with each other, and a signal for setting each shift stage is sent from the electronic control unit 4 for the automatic transmission to the electronic control unit 4 for the engine. Have been sent to. Further, a VSC (Vehicle Stability Control) control device 26 for stabilizing the vehicle by suppressing the sideslip of the vehicle
Is provided, and the VSC control device 26 and the electronic control devices 4 and 17 are connected to each other so that data communication is possible.

The above automatic transmission 2 has four forward gears and one reverse gear.
It is possible to set the shift speed, and an example of the gear train is shown in FIG. The gear train shown here is the same as that described in JP-A-4-185967, and the automatic transmission 2 includes a lock-up clutch Lc.
Torque converter Tc having two sets, a second speed change section G2 having a set of planetary gear mechanisms, and a first speed change section G1 for setting a plurality of forward speeds and reverse speeds by two sets of planetary gear mechanisms.
It has and.

The second speed change section G2 is for performing two-stage switching between high and low. The carrier 27 of the planetary gear mechanism is connected to the turbine runner Tr of the torque converter Tc, and this carrier 27 is also used. Between the sun gear 28 and the sun gear 28, a clutch C0 and a one-way clutch Fo are provided in parallel relationship with each other.
A brake B0 is provided between the housing and the housing Hu.

The sun gears 29, 30 in each planetary gear mechanism of the first speed change section G1 are provided on a common sun gear shaft 31, and in the planetary gear mechanism on the left side (front side) in the figure of the first speed change section G1. Ring gear 32 and second
A first clutch C1 is provided between the gear unit G2 and the ring gear 33, and a second clutch C2 is provided between the sun gear shaft 31 and the ring gear 33 of the second gear unit G2. The carrier 34 of the planetary gear mechanism on the left side of the figure and the ring gear 35 of the planetary gear mechanism on the right side (rear side) in the first transmission portion G1 are integrally connected, and
The output shaft 36 is attached to the carrier 34 and the ring gear 35.
Are connected.

The first brake B1 which is a band brake is provided on the outer peripheral side of the clutch drum of the second clutch C2 so as to stop the rotation of the sun gear shaft 31, more specifically, the sun gear shaft 31 and the housing. A first one-way clutch F1 and a second brake B2 are arranged in series with Hu, and a second one-way clutch F2 with a carrier 37 and a housing Hu in the planetary gear mechanism on the rear side. The third brake B3 is arranged in parallel.

The automatic transmission 2 provided with the above gear train can set the first speed to the fourth speed in the forward speed, and among these, the first speed and the second speed are engine brakes in the automatic speed change mode. Does not work and it is necessary to apply the engine brake in the manual shift mode, so the hydraulic circuit shown in FIG. 5 is incorporated in the hydraulic control device 16.

The manual valve 40 is a shift device 18
It is switched to 8 positions of P, R, N, D, DM, "4", "3" and "2" corresponding to the range position which can be selected by the line pressure PL according to each range position. Is supplied and discharged from a predetermined port.

In the 1-2 shift valve 50, the signal pressure from the second solenoid valve SOL2 is selectively supplied to the control port 51, and the hydraulic pressure of the second clutch C2 is selectively supplied to the hold port 52. As a result, in the first speed, the state shown in the right half of the drawing is obtained, and in the second to fourth speeds, the state shown in the left half is obtained, and hydraulic pressure is supplied to and discharged from the first to third brakes B1 to B3. .

In the 2-3 shift valve 60, the signal pressure of the first solenoid valve SOL1 is selectively supplied to the control port 61, so that in the first speed and the second speed, the state shown in the right half of the figure is obtained. In the third speed and the fourth speed, the state shown in the left half of the figure is established, and the hydraulic pressure is selectively supplied to and discharged from the second clutch C2.

In the 3-4 shift valve 70, the signal pressure from the second solenoid valve SOL2 is selectively supplied to its control port 71, and the line pressure PL is 2-3 shift valve 6.
By being selectively supplied to the hold port 72 via 0, the state shown in the right half of the figure is obtained in the first to third speeds, and the state shown in the left half of the figure is obtained in the fourth speed.
As a result, the clutch C0 and the brake B of the second speed change section G2 are
Hydraulic pressure is selectively supplied to 0 and.

The third solenoid valve S0L3 controls the coast brake cutoff valve 80, and when the first speed or the second speed is selected in the manual shift mode, the third solenoid valve SOL3 is turned on, and as a result, The line pressure PL is supplied from the coast brake cutoff valve 80 to the first brake B1 or the third brake B3 via the 2-3 shift valve 60 and the 1-2 shift valve 50 so that the engine brake works at these shift speeds. Has become.

Here, ON / OFF of the first to third solenoid valves SOL1, SOL2, SOL3 for setting the respective shift speeds in the automatic shift mode (AUTO.) And the manual shift mode (sport mode: MANU.). If you show the state and the state of engagement and release of each friction engagement device,
It is as shown in FIG. 6 is an operation table,
The mark indicates ON for the solenoid valve, engagement for the friction engagement device, and the cross indicates OFF for the solenoid valve, release for the friction engagement device.

The arrangement of each range position in the shift device 18 is shown in FIG. That is, the parking (P) range position and the reverse (R) range position, which are oriented in the front-rear direction of the vehicle, are linearly arranged in the order listed here, and the neutral (N) range position is rightward with respect to the R range position. It is located diagonally rearward. The drive (D) range position is arranged on the rear side of the vehicle with respect to the N range position, and the manual shift mode (DM) position and the "4" range position are arranged on both left and right sides of the D range position. . The "3" range position is arranged on the rear side of the vehicle with respect to the "4" range position, and the "2" range position is arranged diagonally to the right behind the "3" range position. Each of these range positions is connected by a groove that guides the shift lever. Further, when the shift lever is moved to the DM position, the hydraulic pressure is supplied so that the engine brake is effective at all forward gears. A switch 90 for selecting the manual shift mode (sport mode) is provided at an appropriate position on the shift device 18, the steering column, or the instrument panel (not shown).

When the manual shift mode (sport mode) is selected, the plus switch 23 and the minus switch 24 are ready to output signals. These switches are switches that output a signal at the moment the push operation is performed or switches that output a signal only while the push operation is performed. As an example, as shown in FIG. One pair is provided for each.

If the automatic transmission 2 is in the automatic shift mode, the gear shift stage is determined based on the traveling state such as the throttle opening and the vehicle speed and the shift map stored in advance, and the shift is performed. This is performed by outputting a signal to the shift solenoid valves SOL1 to SOL3 so as to set the gear. Shifting in the manual shift mode (sport mode) on the other hand, it is done by pushing the plus switch 23 or negative switch 24 DM switch 90 in ON operation tongue state.

Specifically, the plus switch 23 is turned on once.
When the N operation is performed, an upshift is instructed from the current shift speed to the shift speed on the higher speed side by one, and the minus switch 2
When 4 is turned ON once, a downshift from the current shift speed to the shift speed on the lower speed side by one is instructed. Therefore, although the gear change instruction in the manual gear change mode (sport mode) can be executed regardless of the vehicle state such as the vehicle speed, on the other hand, there is a possibility that the engine 1 may be over-revolved or the gear change shock may be deteriorated. It is judged whether or not the gear shift to the gear stage instructed is executed, the gear shift is executed, or the gear shift instruction is rejected.

FIG. 1 and FIG. 2 show the execution of the shift based on the shift instruction in the manual shift mode (sport mode).
An example of a rejection control routine is shown, and after performing processing of an input signal mainly for reading data (step 1), it is judged whether or not a sports mode (manual shift mode) is selected (step). 2). This decision is
Whether the DM switch 90 described above is ON,
That is, it can be determined by whether or not a signal is output. When the sport mode is selected, the display is performed by the indicator 25 (step 3).

Then, it is judged whether or not the plus switch 23 or the minus switch 24 is turned on (step 4). If any of these switches outputs a signal, or if it outputs a signal, an affirmative decision is made in step 4. In other words, it means that manual operation of upshift or downshift was performed for the current gear stage,
Therefore, in this case, the process proceeds to step 5 and it is determined whether or not the condition for rejecting the shift commanded based on the manual operation is satisfied.

The gear shift in the automatic transmission 2 is executed by engaging and disengaging the frictional engagement device such as a clutch and a brake with hydraulic pressure as described above. Therefore, when the oil temperature is low and the oil viscosity is high. Therefore, there is a possibility that the hydraulic control is not performed normally and the shift shock becomes large. Further, in the sports mode, the engine braking is controlled to be effective at all gears, so when downshifting to increase the gear ratio, the engine 1 speed increases, and depending on the vehicle speed, the engine 1 overrevolution may occur. May occur. In order to execute the shift in this way, it is necessary that a condition corresponding to the shift stage is satisfied, and if the condition is not satisfied, it is determined that the reject condition is satisfied.

When the affirmative judgment is made in step 5 because the reject condition is satisfied, the reject is displayed (step 6). That is, the driver is informed by the indicator 25 that the gear shift by turning on the plus switch 23 or the minus switch 24 is not executed. Then, the reject flag Fr is set to "1" (step 7), and the timer flag F is set again.
T is set to "0" (step 8).

On the other hand, when the shift instruction by turning on the plus switch 23 or the minus switch 24 is allowed, that is, when the reject condition is not satisfied and the negative determination is made in step 5, the plus switch The gear shift commanded by turning on the switch 23 or the minus switch 24 is executed (step 9). Specifically, the shift solenoid valve SOL1
, To SOL3 are output and the signals are switched to shift to a predetermined gear.

Then, the new shift stage after the shift is displayed by the indicator 25 (step 10), and the flags Fr and FT are set to "0" (steps 11 and 12).

On the other hand, if the plus switch 23 or the minus switch 24 is not ON, step 4
If a negative decision is made in step S13, the process proceeds to step S13 and it is judged whether or not the reject flag Fr is "1". The negative determination in step 4 is made when the manual gear shifting operation has not been performed immediately before the routines shown in FIGS. 1 and 2 are executed, and when the manual gear shifting operation is performed, the gear shifting is performed. There are both cases where it is rejected and the switch operation is stopped. In the former case, the reject flag Fr remains "0", so a negative determination is made in step 13, and in this case, this routine is exited without any particular control. On the other hand, in the latter case, that is, when the shift instruction is rejected immediately before, since the reject flag Fr is set to "1" in step 7 described above, a positive determination is made in step 13.

If an affirmative decision is made in step 13,
It is determined whether the timer flag FT is "0", that is, whether the timer has started counting (step 1
4) If the determination in step 14 is affirmative because the timer has not started counting, the timer T is reset to zero and the timer T is started (step 1
5) The timer flag FT is set to "1" (step 16). Then, it is judged again whether the reject condition is satisfied (step 17). If the timer T has already been counted and a negative determination is made in step 14, the process immediately proceeds to step 17.

If a positive determination is made in step 17, that is, if the reject condition is satisfied, step 6
The reject is displayed in the same manner as (step 18). That is, the plus switch 23 or the minus switch 2
Even if 4 is not turned on, if the operation is performed immediately before and the reject condition is satisfied, the reject display is continued. Then, it is judged whether or not the timer T has counted up to a predetermined time T1 (step 19), and if the time T1 has not been reached, the routine returns. On the other hand, when the predetermined time T1 has passed and the affirmative judgment is made in step 19, the flags Fr and FT are set to "0" (step 2).
0, 21), and the reject display is stopped (step 22). That is, when the gear change instruction based on the manual operation is performed but the gear change is not executed, the gear change is not executed for a predetermined time T1 which is predetermined from the time when the switch operation is completed, and the instructed shift speed is The indication that different gears are set is continuously displayed.

On the other hand, if the reject condition is resolved after the switch that has been turned on once is turned off, and if a negative decision is made in step 17, the gear shift instructed by manual operation is immediately executed (step 23). .
Then, the indicator 25 displays the new shift speed after the shift (step 24). In that case, since the gear shift has been properly executed, the reject display is stopped. Then, each flag Fr, FT is set to "0" (steps 25, 26) and then the process returns.

That is, when the plus switch 23 or the minus switch 24 is once turned on, but the shift condition is not executed because the reject condition is satisfied, the switch operated state is maintained for a predetermined time T1, and the shift is performed during that time. When the state becomes executable, that is, when the reject condition is eliminated, the manually instructed shift is executed. Therefore, by using a momentary switch, even when the signal output is short,
Since the gear shift instruction is continuously issued for a predetermined time, it is less likely that the gear shift will not be executed even if the gear shift instruction is issued, and as a result, the gear stage instructed by the manual operation and the gear stage actually set are reduced. A feeling of discomfort caused by the difference between the two is avoided or suppressed.

If a negative determination is made in step 2 because the sports mode is not selected, the display of the sports mode is stopped (step 27), and
After setting the flags Fr and FT to "0" (steps 28 and 29), the process returns.

Therefore, the above steps 2 and 4 correspond to the manual operation detecting means of claims 1 and 2, and steps 7, 13 to 16, 19, 20 correspond to the switching instruction holding means of claim 1. Then step 23
Corresponds to the switching execution means of claim 1. Then Step 6 notification means according to claim 2, steps 18 and 22 correspond respectively to the announcement retention means of claim 2.

The above-mentioned example is an example of the case where the shift by the operation of the so-called shift switch is not achieved, but the overdrive switch in the normal automatic transmission not having the above-mentioned sports mode is turned off, and Even when the accompanying downshift is prohibited, the control may be performed as described above. In that case, steps 2 and 3 and steps 27 to 29 in FIG. 1 are deleted, and step 4 is turned on / of the overdrive switch.
It may be replaced with the judgment step of F.

The same control can be performed when the shift range is not achieved because a predetermined condition is not satisfied. An example will be briefly described.

FIG. 9 shows an example in which a range switch is provided, and a column type shift lever 94 is provided near the steering wheel 93. This shift lever 94 has four ranges of P range, R range, N range, and D range.
The position can be set, and a manual valve (not shown) is switched according to each range position. A cut switch 95 and a cutoff switch 96 are provided at two locations in the center of the steering wheel 93. The forward range is switched each time these switches are operated once. Specifically, each time the cut switch 95 is turned ON once with the D range set, D ( 4) A signal for switching the range to the low speed side one by one, such as range → “3” range → “2” range, is output. On the contrary, the cut-off switch 96 once,
Every time it is turned on, "2" range → "3" range → D
(4) A signal for switching to the high-speed side range is output step by step like the range. The D (4) range, the “3” range, and the “2” range are functionally the same as the ranges set by the shift device shown in FIG. 7, and the gear stages corresponding to the respective ranges are set. Is set.

When the range is switched by the shift device shown in FIG. 9, that is, when the operation is switched to the low speed range, for example, the engine braking is effective at a predetermined gear in the range, If there is a possibility of over-revolution, the range switching instruction may be rejected or withheld.
In that case, by executing the control shown in FIG. 1 and FIG. 2, it is possible to prevent unsuccessful range switching and discomfort associated with the notification. In the case of control accompanying such range switching, step 4 in FIG.
Is replaced with a step of determining whether the cut switch and the cutoff switch are turned on, and step 1
The new shift range may be displayed instead of the display of the new shift stage in step 0 and step 24.

It should be noted that the present invention is not limited to a control device for an automatic transmission having the above-mentioned gear train, and in short, an automatic transmission that can give instructions such as gear shifting and gear range switching by manual operation. It can be widely applied to a control device for a transmission. Further, the mechanism for giving instructions such as gear shifting by the manual operation is not limited to the switch attached to the steering wheel described above, and the switches for outputting the switching instruction signal are basically configured to be manually operated. Just do it. The manual operation may be an operation via some member such as a shift lever other than the direct control by hand. This also applies to the switch for selecting the manual shift mode (sport mode),
The switch for selecting the manual shift mode is not limited to the DM switch operated by the shift lever shown in the specific example described above. The notification means that can be used in the present invention is not limited to a visual notification means such as a lamp or an LED, and a buzzer, vibration or the like may be any means that can appeal to the driver's five senses.

[0051]

As described above, according to the first aspect of the present invention, when the gear change or the change of the gear range instructed by the manual operation is not executed, the change instruction is held for a predetermined time and the change instruction is held. If a predetermined condition for execution of gear shifting or gear shifting range is satisfied while the state continues, the switching operation instructed based on the manual operation is executed, so that the switching instruction operation is performed in a short time. Even if it is done in advance, since the switching instruction state continues for a long time to some extent, the driver's determination of the shiftable state such as the shift and the shift range (establishment of the predetermined condition) is slightly deviated in timing. Even if so, a predetermined switching operation is executed when the condition is satisfied while the switching instruction state is continued. As a result, even if a switching instruction is issued by using a device that outputs a signal such as a momentary switch in a short time, a timing margin for the switching instruction such as gear shifting is secured, and the switching instruction is Immediate rejection or cancellation will not occur, and it is possible to prevent or suppress a sense of discomfort due to non-execution of switching of the shift stage or shift range based on manual operation.

[0052] According to the inventions described in claims 2 to 4, in the case of performing a switching instruction based on the manual operation, the unsatisfied condition for executing the switching instruction gear position and shift range If a gear position or a gear range different from the above is set, the notification means notifies such a difference, and the notification state remains even after the switching instruction is completed.
Tokoro scheduled period of, since it is held, to the switching instruction by manual operation, even if there is variation in length due to individual differences of the driver, announcements that are set different operating states and their switching instruction end is integrated can be one for a certain time from the end time point of the switching instruction by manual operation, thus the timing and duration of the announcements, it is possible to prevent or suppress the discomfort caused by such variations depending on the situation.

[Brief description of drawings]

FIG. 1 is a diagram showing a part of a flow chart for explaining a control example implemented by a control device of the present invention.

FIG. 2 is a diagram showing another part of the flowchart.

FIG. 3 is a diagram schematically showing an overall control system of an automatic transmission targeted by the present invention.

FIG. 4 is a skeleton diagram showing an example of a gear train of an automatic transmission targeted by the present invention.

FIG. 5 is a partial hydraulic circuit diagram showing a part of a hydraulic circuit of the automatic transmission targeted by the present invention.

FIG. 6 is a diagram showing an engagement operation table of a friction engagement device for setting each shift speed in the automatic transmission.

FIG. 7 is a diagram showing an array at each range position in the shift device.

FIG. 8 is a diagram showing an arrangement of switches for instructing an upshift and a downshift.

FIG. 9 is a schematic view showing an example in which a switch for switching a traveling range is provided on a steering wheel.

[Explanation of symbols]

1 engine 2 automatic transmission 4 electronic control device 17 for an automatic transmission electronic control unit 22 sport mode switch 23 plus the switch 24 minus the switch 25 indicator 95 cut switch 96 cut off switch for the engine

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Taniguchi 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Automobile Co., Ltd. (56) Reference JP 5-172225 (JP, A) JP 7-301324 (JP, A) JP-A-9-26028 (JP, A) JP-A-6-331019 (JP, A) JP-A-5-322036 (JP, A) Actual development Shou 60-72327 (JP, U) Actual Kai 61-137150 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16H 59/00-61/12 F16H 61/16-61/24 F16H 63/40-63/48

Claims (4)

(57) [Claims] 1. A control device for an automatic transmission, which issues an instruction to switch a shift stage or a shift range based on a manual operation, and does not switch the shift or the shift range when a predetermined condition is not satisfied. And a manual operation detecting means for detecting an instruction to switch a shift stage or a shift range based on the instruction, and the manual operation detecting means after detecting that the shift operation of the shift stage or the shift range is instructed based on the manual operation. Switching instruction holding means for holding the switching instruction state for a predetermined time when the switching operation based on the above is not executed, and a shift stage or a shift range based on the manual operation when the predetermined condition is satisfied during the predetermined time. And a switching execution means for executing switching to the automatic transmission. Place 2. An automatic notification that a switching instruction signal for a shift stage or a shift range can be output by a manual operation, and if a predetermined condition is not satisfied, the switching instruction signal based on the manual operation is not executed. a control device for a transmission, to notify that the manual changeover detection means for detecting that a gear change or shift range based on the manual operation is instructed, the switching operation that is based on the manual operation is not executed announcement the manual and means, without prior Symbol switching operation based on the switching operation is executed
Even after the completion of the switching instruction based on the operation, the predetermined time
Control system for an automatic transmission between, characterized in that and a notification holding means for continuing a notification by the pre-Symbol notification means. 3. The notification means shifts by manual operation.
Shifting is not executed in sports mode
3. The method according to claim 2, further comprising means for notifying that something is wrong.
A control device for an automatic transmission according to. 4. The manual operation after the predetermined time has elapsed
It is configured so that the switching instruction based on the operation is canceled.
The automatic change according to claim 2 or 3, characterized in that
Speed control device.