JPH1019120A - Control device for automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain the occurrence of a sense of incongruity due to nonexecution of change-over by executing a change-over action when a specified condition for executing the change-over of each step of gear shifting and each range far gear shifting, is satisfied while a change-over directing condition is being continued in case that the change-over of each step of gear shifting and each range for gear shifting and the like, which are manually directed, is not executed. SOLUTION: In the electronic control device 17 for an automatic transmission, when a sport mode (manual gear shifting mode) is selected by a signal from a sport mode switch 22, its judged whether or not a plus switch 23 or a minus switch 24 has been turned on. It is also judged whether or not a condition for rejecting manually directed gear shifting, has been established. Namely, when oil temperature is low, and oil viscosity is high, since shift quality is possibly high, it is judged that a condition of rejection is thereby established, and the aforesaid control device is brought into a nonexecuting condition for gear shifting. And when a specified condition is satisfied while a change-over directing condition is being continued, the change-over of each step of gear shifting and each range for gear shifting as directed is thereby executed based on manual operations.

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 a so-called automatic shift based on a running state of a vehicle and a so-called manual shift based on a manual operation.

[0002]

2. Description of the Related Art Applicants have already proposed such an automatic transmission in Japanese Patent Application Laid-Open No. 5-172225. This automatic transmission is premised on an automatic transmission configured to electrically control a shift solenoid valve to output a signal pressure, and to perform a shift by switching a shift valve based on the signal pressure. In addition to outputting an electric signal to the valve based on a running state such as a throttle opening and a vehicle speed, a predetermined switch is operated based on a manual operation to output a signal for shifting to the shift solenoid valve. It is configured.

More specifically, shift positions for setting a range in the automatic transmission mode are linearly arranged, and a linear groove for guiding the shift lever is provided in the shift position in these range positions. The shift positions for setting the shift speed in the manual shift mode are arranged at the four vertices of a rectangle, and an H-shaped groove that guides the shift lever at these shift positions intersects the straight groove at the drive range position. The shift device is formed as follows. 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 shape groove and the switch at the predetermined gear position is operated, the electronic control device normally outputs a 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, the shift speed may not be allowed mechanically. For example, if a manual operation of downshifting to a low-to-medium speed stage is performed while traveling at high speed, the engine speed is too high because each gear stage in the manual shift mode is a speed stage where engine braking is effective. (Over-revolution) may occur. In the above conventional automatic transmission, in such a case,
Achieving the gear position instructed by the manual operation is prohibited, and the display is blinked at the same time to notify that the actual shift position and the shift lever position are different.

[0005]

However, in the above-mentioned conventional automatic transmission, if the shift lever is set to a predetermined shift position in the manual shift mode, the shift is performed while the shift lever is in the shift position. As long as the gear position signal is continuously output and the setting of the gear position is prohibited due to over-revolution of the engine or the like, the notification by the indicator is continued. On the other hand, as a type of selecting a gear by a manual operation in an automatic transmission, a type using a switch, such as a momentary switch, which outputs a signal instantly when an ON operation is performed is known. In this type of automatic transmission capable of manual shifting, a shift prohibiting condition such as a state of the vehicle such as a vehicle speed being incompatible with the shift speed instructed by the shift when the shift operation is performed in the manual shift mode is performed. If it is established, the gear selected by the manual operation is not achieved, and the gear change instruction is substantially canceled.

In such a case, the shift in the manual shift mode will not be executed unless the shift instruction is manually performed again. However, on the contrary, if the switch operation is continued, even if it is a momentary switch, the shift signal is substantially continuously output, and during that time the state of the vehicle changes and the shift is executed. Sometimes. That is, there is a possibility that the driver may feel uncomfortable, for example, shifting may or may not be performed depending on the manner of manual shifting operation, and the coincidence / mismatch between the manual operation of the driver and the achievement of the shift speed may not be unified. Was. Similarly, the operation of means such as a lamp for notifying that the gear position instructed by the manual operation does not match the actual gear position,
There was a possibility that they would not always be unified.

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

[0008]

In order to achieve the above object, the invention according to the first aspect of the present invention provides an instruction to switch a gear position or a gear range based on a manual operation and a predetermined condition. In a control device for an automatic transmission that does not switch the shift or the shift range when is not satisfied, a manual operation detecting unit that detects an instruction to switch a shift speed or a shift range based on a manual operation, and the manual operation detecting unit includes: A switching instruction holding unit that, after detecting that an instruction to switch the gear position or the shift range based on the manual operation has been issued, holds the switching instruction state for a predetermined time if a switching operation based on the instruction is not performed; A shift stage or a shift range based on the manual operation when the predetermined condition is satisfied during a predetermined time; 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 present invention, when a change instruction such as a gear position or a shift range is issued by a manual operation, the change instruction state is maintained for a predetermined time. In this case, at the time when the switching instruction based on the manual operation is performed, a state in which the switching to the instructed shift speed or shift range cannot be performed, that is, when the predetermined condition is not satisfied, the switching instruction operation is performed. At the same time, the change of the gear position or the shift range is not executed, but if the predetermined condition is satisfied while the change instruction state is continued, the change to the gear position or the shift range instructed based on the manual operation is performed. Be executed. That is, even if the switching instruction operation is performed in a short time, the switching instruction state continues for a relatively long time, so that the driver determines whether or not the switching is possible (the predetermined condition is satisfied) in terms of timing. Even if there is a shift, shifting or shifting of the shift range is executed when the condition is satisfied while the switching instruction state is continued. In other words, even if a switching instruction is issued using a device such as a momentary switch that outputs a signal in a short time, a margin in timing of the switching instruction is secured, and the switching instruction is immediately rejected or rejected. Since there is no cancellation, it is possible to prevent or suppress a sense of incongruity due to non-execution of switching of a shift or a shift range based on a manual operation.

According to a second aspect of the present invention, it is possible to output a shift instruction signal for a shift stage or a shift range by a manual operation, and when a predetermined condition is not satisfied, a switch instruction based on the manual operation. In a control device of the automatic transmission for notifying that the signal is not executed, a manual switch detecting unit for detecting that a shift of a shift speed or a shift range based on the manual operation has been instructed,
Notifying means for notifying that the switching operation based on the manual operation is not executed, holding time detecting means for detecting that a predetermined time has elapsed from the end of the switching instruction based on the manual operation, and the holding time detecting means And a notification holding means for continuing the notification by the notification means until it is detected that the predetermined time has elapsed.

Therefore, according to the second aspect of the present invention, when an instruction such as switching of a gear position or a shift range based on a manual operation is issued, the instructed switching operation is not executed due to the satisfaction of a condition for executing the switching. The notification means notifies the user of the difference between the instruction content and the actual operation. The notification state continues for a predetermined time after the end of the switching instruction. Therefore, even if there is a variation in the switching instruction by manual operation due to individual differences between drivers, etc., the end of the notification that the operation state different from the switching instruction has been set is terminated by the manual switching instruction. Since the notification is unified for a certain period of time from the end point, it is possible to prevent or suppress a sense of incongruity due to the fact that the notification timing and duration vary depending on the situation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described more specifically with reference to the drawings. 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 device 4. Has been entered. An electronic throttle valve 6 driven by a throttle actuator 5 is provided in an intake pipe of the engine 1. A control signal is output from the control device 4 to the throttle actuator 5 in accordance with the amount of depression of the accelerator pedal 3, and the opening of the electronic throttle valve 6 is controlled in accordance with the amount of control.

An 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. The electronic control unit 4 includes, in addition to a signal corresponding to the depression amount of the accelerator pedal 3 described above,
Output signal of engine speed sensor 7, output signal of intake air flow 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
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 engine electronic control unit 4 outputs a signal to the fuel injection device 14, an igniter 15 for changing the ignition timing, and the like for torque control at the time of gear shifting or the like. It is configured.

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

An electronic control unit 17 for an automatic transmission for outputting a control signal to each solenoid valve in the hydraulic control circuit 16 is provided. The electronic control unit 17 for the automatic transmission includes a central processing unit (CPU) and a storage unit (RA), like the electronic control unit 4 for the engine.
M, ROM) and an input / output interface, and therefore can be integrated with the engine electronic control unit 4 as necessary. The electronic control unit 17 for the automatic transmission performs a calculation based on the 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 of the solenoid valves to perform a shift or lock-up. It is configured to execute control of engagement / disengagement of a clutch, control of transient hydraulic pressure during gear shifting, and the like.

The electronic control unit 17 for the automatic transmission stores the throttle opening sensor 1 as control data as control data.
0, the output signal of the vehicle speed sensor 11, the output signal of the coolant temperature sensor 12, the output signal of the brake switch 13, the signal from the shift position sensor 19 provided in the shift device 18, the torque converter described later. From the turbine speed sensor 20, the signal from the kick down switch 21 which is turned ON when the accelerator pedal 3 is fully depressed, the signal from the sport mode switch 22 for setting the manual shift mode, and the signal from the manual shift mode. Plus (+) switch 23 for instructing shift
, And a signal from a minus (-) switch 24 for instructing a downshift in the manual shift mode. Further, the electronic control unit 17 for the automatic transmission includes an indicator 25 such as a lamp or an LED (light emitting diode).
Is connected, and the indicator 25 indicates the set shift speed, the non-execution of the shift or the manual / automatic shift mode, and the like.
The driver is notified by lighting or blinking.

The electronic control units 4 and 17 are connected so as to be able to communicate with each other, and the electronic control unit 17 for the automatic transmission transmits a signal for setting each gear position to the electronic control unit 4 for the engine. Has been sent to. Further, a vehicle stability control (VSC) control device 26 for performing vehicle stabilization control while suppressing vehicle skidding and the like.
The VSC control device 26 and the electronic control devices 4 and 17 are connected so as to be able to perform data communication with each other.

The automatic transmission 2 has four forward speeds and one reverse speed.
The gear stage can be set, and an example of the gear train is shown in FIG. The gear train shown here is the same as that described in Japanese Patent Application Laid-Open No. Hei 4-185967, and the automatic transmission 2 includes a lock-up clutch Lc
, A second transmission section G2 having a set of planetary gear mechanisms, and a first transmission section G1 for setting a plurality of forward speeds and reverse speeds by two sets of planetary gear mechanisms.
And

The second transmission portion G2 performs high-low two-stage switching. The carrier 27 of the planetary gear mechanism is connected to the turbine runner Tr of the torque converter Tc. And a sun gear 28, a clutch C0 and a one-way clutch Fo are provided in a mutually parallel relationship.
A brake B0 is provided between the motor and the housing Hu.

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

A first brake B1 as 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. Hu, a first one-way clutch F1 and a second brake B2 are arranged in series, and between the carrier 37 and the housing Hu in the rear planetary gear mechanism, the first one-way clutch F2 and the second brake B2 are arranged in series. The third brake B3 is arranged in parallel.

The automatic transmission 2 provided with the above-described gear train can set the first to fourth speeds in the forward gear. Among these, the first and second speeds are set in the automatic shift mode and the engine brake is set. Does not work, and it is necessary to apply the engine brake in the manual shift mode. Therefore, the hydraulic circuit shown in FIG.

The manual valve 40 is connected to the shift device 18.
Is switched to eight positions P, R, N, D, DM, "4", "3", and "2" in correspondence with the range position that can be selected, and the line pressure PL according to each range position. Are 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 figure is reached, and in the second to fourth speeds, the state shown in the left half is reached, and the hydraulic pressure is supplied to and discharged from the first to third brakes B1 to B3. .

When the signal pressure of the first solenoid valve SOL1 is selectively supplied to the control port 61, the shift valve 60 is brought into the state shown in the right half of the figure at the first speed and the second speed. In the third and fourth speeds, the state shown in the left half of the figure is reached, and the hydraulic pressure is selectively supplied to and discharged from the second clutch C2.

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

The third solenoid valve S0L3 controls the coast brake cutoff valve 80. 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 cut-off 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 can be operated at these shift speeds. Has become.

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

FIG. 7 shows the arrangement of each range position in the shift device 18. That is, the parking (P) range position and the reverse (R) range position in the front-rear direction of the vehicle are linearly arranged in the order listed here, and the neutral (N) range position is shifted to the right with respect to the R range position. It is arranged diagonally backward. A drive (D) range position is arranged on the rear side of the vehicle with respect to the N range position, and a manual shift mode (DM) position and a “4” range position are arranged on both left and right sides of the D range position. . A "3" range position is disposed on the vehicle rear side with respect to the "4" range position, and a "2" range position is disposed diagonally 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, hydraulic pressure is supplied so that engine braking is effective in all forward gears. A switch 90 for selecting a manual shift mode (sport mode) is provided at an appropriate position on the shift device 18, the steering column, or the instrument panel (each not shown).

When the manual shift mode (sports mode) is selected, the plus switch 23 and the minus switch 24 can output signals. These switches are switches that output a signal at the moment of performing the push operation or switches that output the signal only while the push operation is performed. As an example, as illustrated in FIG. Each pair is provided.

In the automatic transmission 2 described above, if the automatic transmission is in the automatic transmission mode, the shift speed is determined based on a running state such as a throttle opening and a vehicle speed and a previously stored shift map. This is performed by outputting signals to the shift solenoid valves SOL1 to SOL3 so as to set the stage. On the other hand, shifting in the manual shifting mode (sport mode) is performed by pushing the plus switch 23 or the minus switch 24 while the DM switch 90 is turned on.

Specifically, the plus switch 23 is turned once
When the N operation is performed, an upshift from the current gear position to the one-speed higher gear position is instructed.
When the fourth gear 4 is turned ON once, a downshift from the current gear position to the lower gear position is instructed. Therefore, the shift instruction in the manual shift mode (sport mode) can be executed irrespective of the state of the vehicle such as the vehicle speed. However, on the other hand, there is a possibility that the engine 1 is over-revolution or shift shock is deteriorated. Judge whether the shift to the gear designated by the instruction is appropriate or not, execute the gear shift, or reject the gear shift instruction.

FIGS. 1 and 2 show the execution of a shift based on a shift instruction in the manual shift mode (sports mode).
5 shows an example of a rejection control routine. After performing input signal processing (step 1) mainly for reading data, it is determined whether or not a sport mode (manual shift mode) is selected (step). 2). This decision
Whether or not the aforementioned DM switch 90 is ON,
That is, it can be determined based on whether or not a signal is being output. If the sports mode has been selected, the display is performed by the indicator 25 (step 3).

Next, it is determined whether the plus switch 23 or the minus switch 24 has been turned ON (step 4). If any of these switches output a signal, or if any of the switches output a signal, an affirmative determination is made in step 4. That is, the manual operation of the upshift or the downshift was performed for the current gear position,
Therefore, in this case, the process proceeds to step 5, and it is determined whether or not a condition for rejecting a shift instructed based on a manual operation is satisfied.

The shift in the automatic transmission 2 is executed by engaging and disengaging the frictional engagement devices such as clutches and brakes by hydraulic pressure as described above. Therefore, when the oil temperature is low, the oil viscosity is high. In this case, the control of the hydraulic pressure may not be performed normally, and the shift shock may increase. In the sport mode, the engine brake is controlled to be effective at all gears. Therefore, when downshifting and increasing the gear ratio, the number of revolutions of the engine 1 increases, and depending on the vehicle speed, the overrevolution of the engine 1 may occur. May occur. In order to execute the shift as described above, it is necessary that a condition corresponding to the shift speed is satisfied. If the condition is not satisfied, it is determined that the reject condition is satisfied.

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

On the other hand, if the shift instruction by turning on the plus switch 23 or minus switch 24 is permitted, that is, if the reject condition is not satisfied and the negative determination is made in step 5, the plus switch is set. The gear change instructed by turning ON the 23 or the minus switch 24 is executed (step 9). Specifically, the shift solenoid valve SOL1
,..., SOL3 to perform a switching operation to shift to a predetermined gear.

Then, a new gear position after the gear change 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 determination is made in step (1), the routine proceeds to step 13, where it is determined whether or not the reject flag Fr is "1". The situations in which a negative determination is made in step 4 include a case where no manual shift operation has been performed immediately before the execution of the routine shown in FIGS. 1 and 2 and a case where the manual shift operation has been performed but the shift has been performed. There are both cases where the operation is rejected and the switch operation is stopped. In the former case, since the reject flag Fr remains "0", a negative determination is made in step 13, and in this case, the routine exits without performing 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, an affirmative determination is made in step 13.

If an affirmative decision is made in step 13,
It is determined whether or not the timer flag FT is "0", that is, whether or not the timer has started counting (step 1).
4) If an affirmative determination is made in step 14 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 determined 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 the determination in step 17 is affirmative, that is, if the reject condition is satisfied, step 6
The reject is displayed in the same manner as (1). That is, plus switch 23 or minus switch 2
Even if 4 has not been turned ON, if the operation was performed immediately before and the reject condition is satisfied, the reject display is continued. Then, it is determined whether or not the timer T has counted up to a predetermined time T1 (step 19). If the time T1 has not been reached, the routine returns. On the other hand, if the predetermined time T1 elapses and an affirmative determination is made in step 19, each of the flags Fr and FT is set to "0" (step 2).
0, 21), and the reject display is stopped (step 22). That is, when a shift instruction based on a manual operation is issued but the shift is not executed, the shift is not executed for a predetermined time T1 from the time when the switch operation is completed, and the designated shift speed is An indication that a different gear is set is continuously displayed.

On the other hand, if the reject condition is resolved after the switch once turned on is turned off and the negative determination is made in step 17, the gear shift instructed by the manual operation is immediately executed (step 23). .
Then, a display indicating a new gear position after the shift is performed by the indicator 25 (step 24). In this case, the reject display is stopped because the shift has been executed normally. After setting the respective flags Fr and FT to "0" (steps 25 and 26), the process returns.

That is, when the plus switch 23 or the minus switch 24 is once turned on, but the reject condition is satisfied and the shift is not executed, the switch operated state is held for a predetermined time T1, and the shift is performed during that time. When it becomes possible to execute the shift, that is, when the reject condition is resolved, the shift manually instructed is executed. Therefore, even if the signal output is short by using a momentary switch,
Since the shift instruction is continuously performed for a predetermined time, the occurrence of a situation in which the shift is not executed even when the shift instruction is performed is reduced, and as a result, the shift position instructed by the manual operation and the actually set shift position Is avoided or suppressed due to the difference between the two.

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

Therefore, steps 2 and 4 correspond to the manual operation detecting means of claims 1 and 2, and steps 7, 13 to 16, 19, and 20 correspond to the switching instruction holding means of claim 1. And step 23
Corresponds to the switching execution means of claim 1. Step 6 corresponds to the notification means of claim 2, step 19 corresponds to the holding time detecting means of claim 2, and steps 18 and 22 correspond to the notification holding means of claim 2.

The above-mentioned example is an example in which a shift is not achieved by operating a so-called shift switch. However, the overdrive switch in a normal automatic transmission not having the above-mentioned sport mode is turned off, and Even when the accompanying downshift is prohibited, the control may be performed as described above. In this case, steps 2 and 3 and steps 27 to 29 in FIG. 1 are deleted, and step 4 is changed to ON / OF of the overdrive switch.
What is necessary is just to replace with the determination step of F.

The same control can be performed even when the shift range cannot be changed due to the failure of the predetermined condition. An example will be described briefly.

FIG. 9 shows an example in which a range changeover 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.
A position can be set, and a manual valve (not shown) is switched according to each of these range positions. A cut switch 95 and a cut-off switch 96 are provided at two places in the center of the steering wheel 93. Each time these switches are operated once, the forward range is switched. Specifically, with the D range set, the cut switch 95 is turned on once each time the cut switch 95 is turned ON. 4) A signal for switching one stage at a time to the low-speed range, such as range → “3” range → “2” range, is output. Conversely, once the cutoff switch 96 is turned on,
Every time ON operation is performed, "2" range → "3" range → D
(4) A signal for switching one step at a time to the high-speed range, such as a range, is output. The D (4) range, the "3" range, and the "2" range are functionally the same as the respective ranges set by the shift device shown in FIG. 7, and the speed corresponding to each range is different. Is set.

When the range is switched by the shift device shown in FIG. 9, that is, for example, when an operation for switching to a lower speed range is performed, the engine brake 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 suspended.
In this case, by executing the control shown in FIGS. 1 and 2, it is possible to prevent a failure in switching the range and a sense of discomfort associated with the notification. In the case of the control accompanying such range switching, step 4 in FIG.
Is replaced with a step of determining whether or not the cut switch and the cutoff switch are turned on.
The display of the new shift range may be performed in place of the display of the new shift stage at 0 and step 24.

The present invention is not limited to a control device for an automatic transmission having the above-described gear train. In short, the present invention is not limited to an automatic transmission capable of instructing a shift or switching of a shift range by manual operation. The present invention can be widely applied to a control device for a transmission. Further, the mechanism for instructing a shift or the like by the manual operation is not limited to the switch mounted on the steering wheel described above, and the switches for outputting the switching instruction signal are, in short, 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. The same applies to the switch for selecting the manual shift mode (sports 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 notifying means that can be used in the present invention is not limited to a notifying means such as a lamp or an LED that appeals to the sight. Any means such as a buzzer or vibration may be used as long as it can appeal to the driver's five senses.

[0051]

As described above, according to the first aspect of the present invention, when the shift or the change of the shift range specified by the manual operation is not performed, the change instruction is held for a predetermined time, and the change instruction is held. If the predetermined condition for executing the shift or the shift of the shift range is satisfied while the state is continued, the switching operation instructed based on the manual operation is performed, so that the switching instruction operation is performed in a short time. Even if it is performed during this time, the switching instruction state continues for a relatively long period of time, so that the driver's determination of the switchable state of the shift or the shift range (the establishment of the predetermined condition) is slightly shifted in timing. Even if the condition is satisfied while the switching instruction state is maintained, the predetermined switching operation is performed. As a result, even if the switching instruction is issued by using a device such as a momentary switch that outputs a signal in a short time, a timing margin for the switching instruction such as a shift is secured, and the switching instruction is issued. It is no longer immediately rejected or canceled, and it is possible to prevent or suppress a sense of incongruity due to non-execution of switching of the shift speed or the shift range based on the manual operation.

According to the second aspect of the present invention,
When a switching instruction based on a manual operation is performed, if a condition for executing the switching is not established and a speed or a speed range different from the specified speed or speed range is set, such a difference is notified. Since the means is notified and the notification state is maintained for a predetermined time after the switching instruction is completed, even if the switching instruction by manual operation has a long or short variation due to individual differences between drivers, etc. The termination of the notification that an operation state different from the switching instruction is set is unified for a certain period of time from the end of the switching instruction by manual operation, and therefore, the timing and duration of the notification may vary depending on the situation. It is possible to prevent or suppress discomfort due to variations or the like.

[Brief description of the drawings]

FIG. 1 is a diagram showing a part of a flowchart 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 the automatic transmission targeted by the present invention.

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

FIG. 5 is a partial hydraulic circuit diagram showing a part of a hydraulic circuit of the automatic transmission according to 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 arrangement of 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 diagram showing an example in which a switch for switching a traveling range is provided on a steering wheel.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 engine 2 automatic transmission 4 engine electronic control unit 17 automatic transmission required electronic control unit 22 sports mode switch 23 plus switch 24 minus switch 25 indicator 95 cut switch 96 cutoff switch

Continued on the front page (72) Inventor Koji Taniguchi 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (2)

[Claims] 1. A control device for an automatic transmission which issues an instruction to switch a gear position 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. Manual operation detecting means for detecting an instruction to switch the gear position or shift range based on the instruction, and after the manual operation detecting means detects that the instruction to switch the gear position or shift range based on the manual operation is given, the instruction is given. Switching instruction holding means for holding a switching instruction state for a predetermined period of time when a switching operation based on is not executed, and a gear position or gear range based on the manual operation when the predetermined condition is satisfied during the predetermined time period Control device for an automatic transmission, the control device comprising: Place. 2. A switching instruction signal of a gear position or a gear range can be output by a manual operation, and if a predetermined condition is not satisfied, an automatic notification notifying that a switching instruction signal based on the manual operation is not executed. In the control device for a transmission, a manual switch detecting means for detecting that an instruction to switch a gear position or a shift range based on the manual operation has been given, and a notice notifying that a switching operation based on the manual operation is not performed. Means, a holding time detecting means for detecting that a predetermined time has elapsed from the end of the switching instruction based on the manual operation, and a notification by the notifying means until the holding time detecting means detects that the predetermined time has elapsed. Control means for an automatic transmission, comprising: a notification holding means for continuing the operation.