JP2000104825A - Control device for automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide good startability in a low μ road and a normal traveling road by providing with a traveling environment detecting means, a means for setting a shift stage at the time of start to a high speed stage, and a means for releasing the start mode of the high speed stage when a shift operation is detected in a manual mode condition. SOLUTION: When an environment where driving wheels easily slip such as a snow road or a frozen road in a traveling road is detected by traveling environment detecting means in either one mode of an automatic mode and a manual mode or both modes thereof, a start mode is set to a high speed stage start mode, and a next speed stage is automatically set to a high speed stage such as second speed at the time of start. When a driver operates a shift operation with a shift lever 3 on traveling with a manual mode in a condition in which the start mode is set to the high speed stage mode, the high speed stage start mode is released, and start is executed with a low speed at the time of next start.

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 that automatically switches gears in accordance with a running state, and more particularly to a control device for an automatic transmission capable of starting in a second speed. Belongs to the technical field.

[0002]

2. Description of the Related Art In recent years, as an automatic transmission for a vehicle, in addition to an automatic mode in which a gear is automatically switched based on a preset shift characteristic, a manual mode in which a gear is switched by a driver operating a shift lever. Is being put into practical use, and such an automatic transmission is disclosed in, for example, JP-A-2-8545.

[0003] As shown in FIG.
By operating the shift lever B in the first shift gate A1 extending in the vehicle longitudinal direction, a P range for parking, an R range for retreat, an N range for neutral, a D range for auto mode, and 3, 2, A second shift gate A2 extending in the front-rear direction of the vehicle via a vehicle-body lateral communication path is provided on the side of the selected position of the D-range, in addition to being capable of selecting the first gear range. When the shift lever B enters the gate A2, the shift mode is switched from the auto mode to the manual mode by turning on the M range switch (select switch) C.

When the shift lever B is operated in the direction A in the second shift gate A2, the shift-up switch D is turned on to shift up the gear by one step. When operated in the direction a, the shift-down switch E is turned on to shift down the gear by one step.

[0005]

According to the automatic transmission having the manual mode as described above, for example, a traveling road having a low coefficient of friction (for example, a snowy road or a frozen road).
By switching the shift mode to the manual mode and selecting the second speed when starting on a "low mu road", it becomes possible to start smoothly without causing slip of the drive wheels.

However, in the case of this type of automatic transmission, when the vehicle is switched to the manual mode while the vehicle is stopped, the gear is usually set to the first speed. Each time, the user has to select the second speed by operating the shift lever.

[0007] Regarding this problem, a conventional automatic transmission without a manual mode has been put into practical use with a so-called snow mode that automatically selects the second speed at the time of starting on a low mu road. It is conceivable that the present invention is also used for the above-described automatic shift having a manual mode.

However, in any case, when the mode is switched to the second speed start mode, there is a problem of when and how to return to the normal first speed start mode. In fact, no satisfactory solution to this problem has been obtained.

Accordingly, the present invention enables the vehicle to start at a high gear speed of 2nd speed or more when traveling on a low mu road such as a snowy road, and sets this high gear speed start mode under appropriate conditions. It is an object of the present invention to achieve good startability on both a low mu road and a normal running road by canceling.

[0010]

In order to solve the above problems, the present invention uses the following means.

First, according to the invention described in claim 1 of the present application (hereinafter referred to as "first invention"), an automatic mode in which the speed is automatically changed according to a traveling state and a shift operation performed by a driver are performed. An automatic transmission provided with shift mode selecting means for selecting a manual mode to be operated, and shift operation detecting means for detecting a shift operation of a driver in a state where the manual mode is selected by the shift mode selecting means. A traveling environment detecting means for detecting an environment in which the driving wheels are likely to slip; and a high speed for setting the shift speed at the start to a high speed other than the first speed when the detecting means detects the environment in which the driving wheels are likely to slip. The high speed start mode is set by the speed start mode setting means and the high speed start mode setting means, and the manual mode is set by the speed mode selection means. A high gear start mode release means for releasing the high gear start mode when a gear shift operation of the driver is detected by the shift operation detecting means in a state in which the shift mode is selected. I do.

According to a second aspect of the present invention (hereinafter referred to as "second invention"), in the first aspect of the present invention, the shift operation of the driver for releasing the high speed start mode detected by the shift operation detecting means. The operation is an operation for rapid acceleration / deceleration.

Further, the invention according to claim 3 (hereinafter referred to as “the invention”)
The "third invention") is the same as the first invention, except that the shift operation of the driver, which is detected by the shift operation detecting means and cancels the high shift start mode, is a jump shift operation that jumps over the shift speed. Features.

On the other hand, the invention described in claim 4 (hereinafter, referred to as "fourth invention") is similar to the first invention in that an automatic mode in which gear shifting is automatically performed in accordance with a driving state and a driver's operation. An automatic transmission provided with a shift mode selecting means for selecting a manual mode for shifting, and a shift operation detecting means for detecting a shift operation of a driver in a state where the manual mode is selected by the shift mode selecting means. A driving environment detecting means for detecting an environment in which the driving wheels are likely to slip; a vehicle speed detecting means for detecting the vehicle speed; and a shift speed at the time of starting when the driving environment detecting means detects an environment in which the driving wheels are likely to slip. High-speed start mode setting means for setting the high-speed start mode other than the first speed, and a state in which the high-speed start mode is set by the high-speed start mode setting means. There are, when the shift operation of the driver by the speed change operation detecting means in a state where the manual mode is selected is detected by the speed change mode selecting means,
Alternatively, there is provided a high speed start mode release means for releasing the high speed start mode when the vehicle speed detected by the vehicle speed detection means is equal to or higher than a predetermined vehicle speed.

According to a fifth aspect of the present invention (hereinafter, referred to as a "fifth aspect"), an automatic mode and a driving mode in which the speed is automatically changed in accordance with the running state, as in the first and fourth aspects. Speed change mode selection means for selecting a manual mode in which a shift is performed by a driver's operation, and speed change operation detection means for detecting a shift operation of the driver in a state where the manual mode is selected by the speed change mode selection means. In an automatic transmission, a driving environment detecting means for detecting an environment in which driving wheels are likely to slip, a vehicle speed detecting means for detecting a vehicle speed, and starting when the driving environment detecting means detects an environment in which driving wheels are likely to slip. A high speed start mode setting means for setting the speed stage to a high speed other than the first speed, and a high speed start mode set by the high speed start mode setting means. In a state where the manual mode is selected by the shift mode selecting means and the vehicle speed detected by the vehicle speed detecting means is equal to or higher than a predetermined vehicle speed, the shift operation detecting means detects the driver's shift operation. And a high speed start mode canceling means for canceling the high speed start mode.

[0016] On the other hand, the invention according to claim 6 (hereinafter referred to as "sixth invention") is a driving environment detecting means for detecting an environment in which drive wheels are likely to slip in an automatic transmission, and a vehicle speed for detecting a vehicle speed. Detecting means; high-gear position start mode setting means for setting the starting gear to a high gear other than the first gear when an environment in which the driving wheels are likely to slip is detected by the traveling environment detecting means; In a state where the high speed start mode is set by the speed start mode setting means, the high speed start mode is released when the vehicle speed detected by the vehicle speed detection means becomes equal to or higher than a predetermined vehicle speed. High speed start mode release means.

The invention according to claim 7 (hereinafter referred to as "the invention")
The "seventh invention" is the predetermined vehicle speed changing means according to any one of the fourth invention to the sixth invention, which changes a predetermined vehicle speed as a condition for releasing the high speed start mode in accordance with the characteristics of the traveling road. Is provided.

Further, the invention according to claim 8 (hereinafter, referred to as the invention)
The "eighth invention" is characterized in that, in the seventh invention, the predetermined vehicle speed changing means uses a road width of the traveling road obtained by the navigation system as a characteristic of the traveling road.

With the above arrangement, the following effects can be obtained according to the present invention.

According to the first aspect of the present invention, in one or both of the automatic mode and the manual mode, the driving wheels such as a snowy road or a frozen road are slipped by the driving environment detecting means by the driving environment detecting means. If an easy environment is detected, the start mode is set to the high gear start mode, and the gear at the next start is automatically set to a high gear such as the second speed. When the driver performs a shift operation with the shift lever during traveling in the manual mode in the state where the high shift speed start mode is set, the high shift speed start mode is released, and When starting, the vehicle starts at the first speed.

That is, when the driver operates the shift lever after selecting the manual mode and shifts down or shifts up the shift speed, it is determined that the driver has operated with the intention of sporty running. At the same time, it is considered that the low mu road condition of the running road has been eliminated.Therefore, by releasing the high speed start mode at this point, the starting that is always adapted to the running environment such as the road surface condition Mode will be obtained.

According to the second invention, when the driver operates the shift lever for rapid acceleration / deceleration in the manual mode, that is, when the driver's intention of sporty traveling is more clearly indicated. Therefore, the elimination of the low mu road state as a premise is determined, and the high speed start mode is released. Therefore, the release timing of the high speed start mode is set more appropriately. .

According to the third aspect of the present invention, when the driver performs a jump shift over the gear by continuous operation of the shift lever in the manual mode, that is, similar to the second aspect of the present invention, the driver's Since the high speed start mode is released when the intention of sporty traveling is more clearly shown, the timing for releasing the high speed start mode is also set more appropriately according to the present invention.

On the other hand, according to the fourth invention, similarly to the first invention, in one of the auto mode and the manual mode or both modes, the driving environment detecting means sets the driving wheels in the low mu road state or the like. If an environment in which the vehicle easily slips is detected, the start mode is set to the high speed start mode, and the speed at the next start is automatically set to the high speed such as the second speed.

According to the fourth aspect of the present invention, when the driver performs a shift operation while driving in the manual mode, or when the vehicle speed is equal to or higher than the predetermined vehicle speed, in the high gear start mode. , The high speed start mode is released.In these cases, it is considered that the low mu road state of the traveling road has been eliminated as a premise, and these In this case, by canceling the high speed start mode, the cancellation is performed at an appropriate time without delay.

According to the fifth aspect of the present invention, when the driver is in the high speed start mode in the same manner as in the first and fourth aspects of the present invention, the driver manually operates at a high speed above a predetermined vehicle speed. When performing a gear change operation in mode,
The high speed start mode is released. Therefore, according to the present invention, the elimination of the low mu road state of the traveling road is more reliably determined, and the release of the high speed start mode is more appropriately performed. Will be done.

On the other hand, according to the sixth aspect of the present invention, when the driving environment detecting means detects an environment in which the driving wheels are liable to slip, such as a low mu road state, the start mode is set to the high gear position, as in the above inventions. In the start mode, the vehicle starts at a high speed other than the first speed at the next start. The high speed start mode is released when the vehicle speed becomes equal to or higher than the predetermined vehicle speed.

That is, since it is determined that the low mu road condition has been eliminated as a precondition for high-speed running at a predetermined vehicle speed or higher, the high-speed start mode is released by executing this high-speed running, so that the release can be properly performed. Will be performed.

Further, according to the seventh invention, the fourth invention,
In the fifth invention and the sixth invention, when it is determined that the vehicle is running at or above a predetermined vehicle speed as a condition for canceling the high gear start mode, the predetermined vehicle speed is changed according to the characteristics of the traveling road. If there is a possibility that the vehicle will run at a relatively high vehicle speed even on a low mu road due to the wide road width, change the direction to increase the predetermined vehicle speed, and the low mu road It is possible to perform the determination more accurately, such as determining that it has been canceled, and thereby the release of the high speed start mode is performed more appropriately.

According to the eighth invention, in the above-mentioned seventh invention, the determination of the characteristic of the traveling road is performed based on the road width of the traveling road obtained by the navigation system. In the case of an existing vehicle, new equipment for the above determination is not required.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described for an automatic transmission in which an automatic mode and a manual mode can be selected.

FIG. 1 shows an operation section of an automatic transmission according to this embodiment. A shift plate for guiding a shift lever 3 is provided on a guide plate 2 provided on a console section 1 on the side of the driver's seat. The shift lever 3 is operated along the shift gate 4.

The shift gate 4 is a stepped path combining a path in the vehicle longitudinal direction (hereinafter, referred to as "shift direction") and a path in the vehicle width direction (hereinafter, referred to as "select direction"). A first gate 4 in which a selection position of an R range, a selection position of an N range, and a selection position of a D range are sequentially provided from the selection position of the frontmost P range to the rear.
a, and a second gate 4c connected to a selected position of the D range in the first gate 4a via a communication path 4b in the select direction.

The second gate 4c is used for the M range,
The connecting portion with the communication path 4b is located at the neutral position of the M range, and extends from this neutral position in the shift direction and back and forth.
u, the leading end of the path extending backward is the shift down position Xd
It has been.

Below the guide plate 2 on which the shift gate 4 is provided, as shown in FIG. 2, when the shift lever 3 is operated by the second gate 4c and positioned at the neutral position of the M range. The base end 3 of the shift lever 3
a range switch 5 which is turned on by a projection 3b provided on the second gate 4c;
The shift-up switch 7 which is turned on by the shift lever 3 via the switch operating member 6 when it is operated
Similarly, a shift down switch 8 which is turned on by the shift lever 3 via the switch operating member 6 when the shift lever 3 is operated to the shift down position Xd in the second gate 4c.
And are arranged.

As shown in FIG. 3, the automatic transmission is provided with a shift control unit (hereinafter referred to as "ATCU") 10 for the transmission.
An inhibitor switch 1 that includes a P range switch 11P, an R range switch 11R, an N range switch 11N, and a D range switch 11D, and that detects a range selected by the shift lever 3.
1, a signal from the M range switch 5, a shift up switch 7 and a shift down switch 8, a signal from a vehicle speed sensor 12 for detecting the vehicle speed of the vehicle, and a throttle for detecting the throttle opening of the engine. A signal from the opening sensor 13, a signal from the engine speed sensor 14 for detecting the engine speed, and a drive wheel speed sensor 15 for detecting the wheel speeds of the drive wheels and the driven wheels, respectively
And a signal from the driven wheel speed sensor 16 and the like.

The ATCU 10 sets a gear based on the operation of the shift lever 3 by the driver and the operating states of the vehicle and the engine based on these signals, so that the gear is realized. A control signal is output to a hydraulic control circuit 20 for speed change control.

Next, the shift control operation including the setting of the shift stage at the time of starting by the ATCU 10 will be described with reference to the flowcharts of FIG.

First, the overall operation of the control will be described with reference to the flowchart of the main program shown in FIG. 4. First, in step S1, the inhibitor switch 1 shown in FIG.
It is determined whether or not the D range switch 11D constituting the first range switch 1 is ON. When the D range switch 11D is not ON, that is, the P range, the R range, or the N range has been selected by operating the shift lever 3, the P range switches 11P, R Range switch 1
When either the 1R or the N range switch 11N is ON, control corresponding to the selected range is executed in step S2 according to a separately provided program.

The D range switch 11D is turned on.
In step S3, it is determined in step S3 whether the M range switch 5 is ON. That is, since the selected position of the shift lever 3 in the D range and the M range is set to the same position in the shift direction, depending on the inhibitor switch 11 for detecting the position of the shift lever 3 in the shift direction, the D range may be changed. Is selected and the M range is selected, the D range switch 11D is turned on, and it is not possible to distinguish between these cases.
When the range switch 11D is ON, it is next determined whether or not the M range switch 5 is ON.

Then, the D range switch 11D is turned on.
If the M range switch 5 is not ON, that is, if it is determined that the D range has been selected, step S4
To execute the shift control in the automatic mode, and when the D range switch 11D is ON and the M range switch 5 is also ON, that is, when it is determined that the M range is selected, the manual mode is selected in step S5. Is executed.

Next, the specific operation of the shift control in the auto mode in step S4 will be described.
First, the vehicle speed and the throttle opening are detected in step S11, and based on these detected values and a shift map set in advance using the vehicle speed and the throttle opening as parameters in step S12. The target shift speed G0 is set.

Next, at step S13, the first speed restriction flag F
Determine the value of 1. This flag F1 is set to a value by a first-speed regulation determination control described later, and is set to 1 when it is determined that the traveling environment is not suitable for the first-speed start, such as when the traveling road is in a low mu road state. Then, when the vehicle is in a traveling environment in which normal first-speed start is possible, since F1 = 0, step S14 is executed next, and the target shift stage G0 set in step S12 is realized as shown in FIG. The control signal is output to the hydraulic control circuit 20 shown in FIG.

On the other hand, when F1 = 1, that is, when it is determined that the traveling environment is not suitable for starting the first speed, such as when the traveling road is a low mu road, the above steps S13 to S1 are executed.
5 to determine whether or not the currently set target gear G0 is the first speed. Then, when the target shift speed G0 is set to the first speed at the time of starting or the like, the target shift speed G0 is changed to the second speed in step S16. As a result, the start mode is set to the second speed start mode, and a control signal is output in step S14 so as to realize the second speed as the target shift speed G0. The vehicle starts at the second speed when starting on a low mu road such as a road.

The shift control in the manual mode in step S5 in the flowchart of FIG. 4 is specifically performed as follows according to the flowchart shown in FIG.

In this control, first, in steps S21 and S21,
At 22, it is determined whether or not the upshift switch 7 has been switched from OFF to ON, and whether or not the downshift switch 8 has been switched from OFF to ON. Then, when the upshift switch 7 is switched from OFF to ON, that is, when the shift lever 3 is operated to the upshift position Xu in the M range, it is determined in step S23 whether or not the current gear G is the fourth speed. On the other hand, if it is a shift speed other than the fourth speed that can be upshifted, step S24
To set the target shift speed G0 one step higher than the current shift speed G.

When the downshift switch 8 is switched from OFF to ON, that is, when the shift lever 3 is operated to the downshift position Xd in the M range, whether the current gear G is the first speed is determined in step S25. If it is determined that the shift speed is a shift speed other than the first speed, the target shift speed G0 is changed to the current shift speed G in step S26.
It is set to one step lower gear.

Then, as in the case of the above-described auto mode, the value of the first-speed restriction flag F1 is determined in step S27, and when F1 = 0, that is, when the vehicle is in a normal traveling environment, step S28 is then performed. Execute the above step S24
Alternatively, a control signal is output to the hydraulic control circuit 20 shown in FIG. 3 so that the target shift speed G0 set in S26 is realized.

On the other hand, when F1 = 1, that is, when the traveling environment is 1
If it is determined that the vehicle is not suitable for the fast start, steps S27 to S29 are executed to determine whether the currently set target gear G0 is the first speed. When the target shift speed G0 is set to the first speed at the time of starting or the like, the target shift speed G0 is set to 2 in step S30.
The control signal is output in step S28 so that the speed is changed to the target speed G0. Accordingly, even in the manual mode, for example, when it is determined that the traveling path is a low mu road such as a snowy road and the traveling environment is not suitable for the first speed start, the vehicle starts at the second speed.

Next, a description will be given of the first speed regulation determination control for setting the value of the first speed regulation flag F1 according to the traveling environment.

First, in the first control example shown in the flow chart of FIG. 7, in step S41, the driving wheel speed V1 and the driven wheel speed V2 based on the signals from the driving wheel speed sensor 15 and the driven wheel speed sensor 16 shown in FIG. And then enter step S4
2, the slip amount S (= V1-
V2), and in step S43, it is determined whether or not the slip amount S is larger than a predetermined value S0.

Then, in a driving environment such as a low mu road where the driving wheels tend to slip, when S> S0,
In step S44, 1 is set to the first speed restriction flag F1. As a result, the second speed start mode is applied in the shift control in the above-described auto mode and manual mode,
The target shift speed G0 at the time of starting is set to the second speed.

Next, in step S45, it is determined whether or not the currently selected shift mode is the manual mode. When the manual mode is selected, the driver further operates the shift lever 3 in step S46. Is determined. When the shift lever 3 is operated to the shift-up position Xu or the shift-down position Xd in the manual mode, this is detected by a signal from the shift-up switch 7 or the shift-down switch 8, and the first-speed restriction flag is detected. Reset F1 to 0.

That is, since the shift operation as described above is performed after selecting the manual mode, it is presumed that the driver intends to run in a sporty manner. Is determined to have been resolved. So, in such a case,
When the first-speed restriction flag F1 is set to 1, the first-speed restriction flag F1 is reset to 0 to cancel the second-speed start mode. The mode will be released at the appropriate time.

Next, a second control example of the first-speed regulation determination control shown in the flowchart of FIG. 8 will be described. Also in this control, in steps S51 to S54, the drive wheel speed V1 is determined.
And the driven wheel speed V2, the slip amount S (= V1-
V2), and the slip amount S becomes a predetermined value S
It is determined whether it is greater than zero. In a driving environment such as a low mu road where the driving wheels are likely to slip, S> S
When it becomes 0, the first speed restriction flag F1 is set to 1.

In this control, it is next determined whether or not the shift mode selected in step S55 is a manual mode. When the manual mode is selected, the jump shift flag F is determined in step S56.
Determine the value of T. This flag FT is set to 1 when it is determined by a control described later that a jump shift has been performed by a continuous operation of the shift lever 3 by the driver. Then, when FT = 1, step S57 is executed to reset the first speed restriction flag F1 to zero.

According to this control, the intention of the sporty traveling by the driver is more clearly determined from the operation of the jumping shift from the fourth speed to the second speed, for example. The muting state is correctly determined to be correctly resolved. Therefore, when the jump shift operation is performed, the first-gear restriction flag F1 is reset to 0 to eliminate the second-gear start mode, so that the timing of the cancellation is more appropriate. Will be set to

Here, the jump shift determination control for setting the value of the jump flag FT will be described.

This control is performed according to the flowchart shown in FIG. 9. First, in step S61, it is determined whether or not the M range switch 5 is ON, that is, whether or not the driver has selected the manual mode. When the manual mode is selected, it is determined in step S62 whether or not the upshift switch 7 has been switched from OFF to ON, and in step S63, the downshift switch 8 has been turned OFF.
It is determined whether or not has been switched from to ON.

When the shift-up switch 7 is switched from OFF to ON by the driver operating the shift lever 3 to the shift-up position Xu, the shift-down flag Fd and the shift-down timer Td are set in step S64. After clearing to 0, step S
At 65, it is determined whether or not the value of the upshift flag Fu is 1. The value of this flag Fu is initially 0, so that steps S66 and S67 are executed next to set the shift-up flag Fu to 1 and start counting the time of the shift-up timer Tu.

When the driver again operates the shift lever 3 to the shift-up position Xu and switches the shift-up switch 7 from OFF to ON during the counting of the shift-up timer Tu, Fu = 1 at this time. Therefore, the steps S65 to S68 are executed, and the measurement of the shift-up timer Tu currently being counted is performed for the predetermined time Tu0.
In the above case, that is, when the time from the first shift-up operation to the second shift-up operation is relatively long, the shift-up flag Fu and the shift-up timer Tu are set in step S69. All are cleared to 0.

On the other hand, in the above step S68, Tu
When it is determined that <Tu0, that is, when it is determined that the time from the first shift-up operation to the second shift-up operation is short and that the shift-up operation is performed continuously, the jump shift flag is set in step S70. FT 1
Set to. In this case, the shift speed is changed from the fourth speed to the second speed, for example, by jumping over the intermediate speed. When the jump speed flag FT is set to 1, the first speed limit flag F1 is reset to 0 in the first speed limit determination control shown in FIG.
The quick start mode is released.

On the other hand, when the shift-down switch 8 is switched from OFF to ON by the driver operating the shift lever 3 to the shift-down position Xd in step S63, the shift-up flag Fu and the shift-up timer are set in step S71. After clearing Tu to 0, in step S72, this time the downshift flag Fd
It is determined whether or not the value of is 1. Then, since the value of the flag Fd is also initially 0, the process proceeds to step S73.
Step S74 is executed to set the downshift flag Fd to 1 and start counting down the downshift timer Td.

When the driver again operates the shift lever 3 to the shift-down position Xd and switches the shift-down switch 8 from OFF to ON during the counting of the shift-down timer Td, the operation proceeds from step S72. Step S75 is executed to determine whether or not the currently measured time of the downshift timer Td is equal to or longer than the predetermined time Td0. In the case where the time is equal to or longer than the predetermined time Td0, the time from the first downshift operation to the second downshift operation is determined. If it is relatively long, both the downshift flag Fd and downshift timer Td are cleared to 0 in step S76.

On the other hand, in step S75, Td
When it is determined that Td0, that is, when it is determined that the time from the first downshift operation to the second downshift operation is short and that the downshift operation has been performed continuously, the jump shift flag is set in step S77. FT 1
Set to. When the jump speed flag FT is set to 1, the first speed limit flag F1 is set to 0 in the first speed limit determination control shown in FIG. 8 in the same manner as when the upshift operation is performed continuously. And the second speed start mode is released.

The control example 3 of the first-speed regulation determination control shown in the flowchart of FIG. 10 is performed as follows.

Also in this control, steps S81 to S81
At 84, the slip amount S (= V1-V2) of the drive wheels is calculated from the drive wheel speed V1 and the driven wheel speed V2, and it is determined whether or not the slip amount S is larger than a predetermined value S0.
Then, in a driving environment such as a low mu road where the driving wheels are likely to slip, when S> S0, the first speed restriction flag F1 is set to 1.

In this control, in step S85, the acceleration / deceleration A of the vehicle is calculated based on the wheel speed such as the driven wheel speed V2 (or based on the signal from the vehicle speed sensor 12). In step S86, the absolute value of the acceleration / deceleration A is compared with a predetermined value A0. When | A |> A0, that is, when relatively large acceleration or deceleration is generated, the first speed restriction flag F1 is set in step S87. 0
To clear.

That is, since the vehicle is running at a relatively large acceleration or deceleration, it is presumed that the low mu road state of the running road has been eliminated and the vehicle can be driven normally. Therefore, when the absolute value of the acceleration / deceleration A becomes larger than the predetermined value A0, the first speed restriction flag F1 is reset to 0 and the second speed start mode is released, so that the release is performed at an appropriate time. Will be

Further, FIG.
The control example 4 of the speed regulation determination control will be described. In this control as well, in steps S91 to S94, the drive wheel speed V
1 and the driven wheel speed V2, the slip amount S (= V1
-V2) and determine whether or not the slip amount S is larger than a predetermined value S0. Then, in a driving environment such as a low mu road where the driving wheels are likely to slip, S>
At S0, the first-speed restriction flag F1 is set to 1.

In this control, next, in step S95, the vehicle speed V is calculated based on the wheel speed such as the driven wheel speed V2 or the like (or based on the signal from the vehicle speed sensor 12). In step S96, the road width W of the traveling road is detected based on the road information from outside the vehicle.
Is calculated based on the characteristics set in advance as shown in FIG. In step S98, the first-speed regulation release vehicle speed V0 is compared with the vehicle speed V. When V> V0, that is, when the vehicle speed becomes higher than the first-speed restriction release vehicle speed V0 corresponding to the road width W, the low-speed limit release vehicle speed V0 is reduced. It is determined that the mu road state has been eliminated, and the first speed restriction flag F1 is cleared to 0 in step S99.

Here, as shown in FIG. 12, the characteristic of the first speed restriction released vehicle speed V0 is set so that the vehicle speed becomes higher as the road width W becomes wider. However, since it is possible to drive at a relatively high vehicle speed even on a low mu road condition, the vehicle speed becomes higher as the road width becomes wider as a reference for determining that the low mu road condition has been resolved. It is desirable to set, and by setting in this way, it is possible to accurately grasp the elimination of the low mu road state, and the second speed start mode is canceled at a more appropriate time.

As a means for obtaining road information from outside the vehicle for detecting the road width W, use of a navigation system is conceivable. In this case, as shown by a dashed line in FIG. 3, the control unit NAVI-CU 30 of the navigation system may be connected to the ATCU 10, so that it is not necessary to separately provide information input means.

[0074]

As described above, according to the first to third aspects of the present invention, it is possible to select between the automatic mode in which the speed is automatically changed according to the traveling state and the manual mode in which the speed is changed by the driver's operation. In an automatic transmission, the first speed is automatically regulated and the mode is switched to a high speed step start mode such as a second speed in a driving environment in which the driving wheels are likely to slip, so that a low mu road such as a snowy road or a frozen road can be obtained. When the vehicle starts moving, the shift mode is set to manual mode and the
The trouble of switching to speed or the like is eliminated.

Then, when the driver performs a predetermined shift operation in the manual mode in the state in which the high speed start mode is set, the high speed start mode is released. In other words, it is correctly understood that the driving environment in which the driving wheels such as the low mu road are liable to slip due to the driver's operation has been eliminated, and the high-speed start mode is released at an optimal time, whereby the road surface is always released. A starting mode suitable for the running environment such as the state is obtained.

According to the fourth aspect of the present invention, similarly to the first aspect of the present invention, the first speed is automatically regulated and switched to the high speed start mode in the driving environment in which the driving wheels are likely to slip. When the driver performs a shift operation in a state where the manual mode is selected, or when the vehicle speed becomes equal to or higher than a predetermined vehicle speed, the high-speed start mode is released. When the driver performs a shift operation in the manual mode during high-speed running at or above the predetermined vehicle speed, the high-gear position start mode is released. However, performing the shift operation in the manual mode and setting the vehicle speed to the predetermined vehicle speed The high vehicle speed mentioned above indicates that the driving environment in which the drive wheels are liable to slip has been eliminated as a prerequisite. By releasing the gear launch mode, so that the release takes place more appropriate time.

Further, according to the sixth invention, the start mode is set to the high speed start mode in the driving environment in which the drive wheels are likely to slip, and the high speed start mode is set in the same manner as in the above inventions. Is released when the vehicle speed becomes equal to or higher than the predetermined vehicle speed, so that the release is performed at an appropriate time, similarly to the above-described inventions.

According to the seventh and eighth aspects,
In the fourth, fifth and sixth aspects of the present invention, when it is determined that the vehicle is running at or above a predetermined vehicle speed as a condition for canceling the high speed start mode, the predetermined vehicle speed is determined by the characteristics of the running road such as the road width. Therefore, the high speed start mode is released at a more appropriate time.

[Brief description of the drawings]

FIG. 1 is a plan view of a shift lever and its periphery according to an embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement of an M range switch, a shift up switch, and a shift down switch operated by a shift lever.

FIG. 3 is a block diagram showing a control system.

FIG. 4 is a flowchart showing a main program of a shift control.

FIG. 5 is a flowchart showing shift control in an auto mode during the main program.

FIG. 6 is a flowchart showing shift control in a manual mode in the same main program.

FIG. 7 is a flowchart illustrating a first control example of first-speed regulation determination control.

FIG. 8 is a flowchart showing a second control example.

FIG. 9 is a flowchart showing a specific operation of a jump shift determination performed in the second control example.

FIG. 10 is a flowchart illustrating a third control example of the first speed regulation determination control.

FIG. 11 is a flowchart illustrating a fourth control example of the first-speed regulation determination control.

FIG. 12 is a map showing characteristics of a first-speed regulation release vehicle speed used in the fourth control example.

FIG. 13 is a schematic plan view showing a conventional example of an arrangement of an M range switch and the like.

[Explanation of symbols]

3 shift mode selecting means (shift lever, M range switch) 7, 8 shift operation detecting means (shift up switch, shift down switch) 10 high speed start mode setting means, high speed start mode release means (shift control Unit) 15, 16 Driving environment detecting means (drive wheel speed sensor, driven wheel speed sensor)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Mitsutoshi Abe 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Hidekazu Sasaki 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. F term (reference) 3J052 AA04 BA24 BB02 BB13 CB02 DB01 GA18 GC01 GD07 GD11 HA01 KA01 LA01

Claims (8)

[Claims] 1. A shift mode selecting means for selecting an automatic mode for automatically shifting gears according to a traveling state and a manual mode for shifting gears by a driver's operation, and a manual mode is selected by the shift mode selecting means. A control device for an automatic transmission, comprising: a shift operation detecting means for detecting a shift operation of a driver in a state; a driving environment detecting means for detecting an environment in which a driving wheel is likely to slip; High speed start mode setting means for setting the speed at the start to a high speed other than the first speed when an environment in which the wheels are likely to slip is detected; and high speed start by the high speed start mode setting means In a state where the mode is set and the manual mode is selected by the shift mode selecting means, the shift operation detecting means detects the driver's shift operation. A control device for an automatic transmission, comprising: a high-gear position start mode releasing means for releasing the high-gear position start mode when an operation is detected. 2. The automatic gear shift according to claim 1, wherein the driver's gear shift operation, which is detected by the gear shift operation detecting means and releases the high speed start mode, is an operation for rapid acceleration / deceleration. Machine control device. 3. The automatic shift operation according to claim 1, wherein the shift operation of the driver, which is detected by the shift operation detecting means and releases the high shift speed start mode, is a jump shift operation that jumps over the shift speed. Transmission control device. 4. A shift mode selecting means for selecting between an automatic mode for automatically shifting gears according to a traveling state and a manual mode for shifting gears by a driver's operation, and the manual mode is selected by the shift mode selecting means. A control device for an automatic transmission, comprising: a shift operation detecting means for detecting a shift operation of a driver in a state; a driving environment detecting means for detecting an environment in which drive wheels are likely to slip; and a vehicle speed for detecting a vehicle speed Detecting means; and high-gear position start mode setting means for setting the starting gear to a high gear other than the first gear when an environment in which the driving wheels are likely to slip is detected by the traveling environment detecting means. In the state where the high speed start mode is set by the high speed start mode setting means, the manual mode is selected by the shift mode selection means. In this state, when the driver's speed change operation is detected by the speed change operation detecting means, or when the vehicle speed detected by the vehicle speed detecting means becomes equal to or higher than a predetermined vehicle speed, the high speed shift start mode is released. A control device for an automatic transmission, comprising: a step starting mode canceling means. 5. A shift mode selecting means for selecting between an automatic mode for automatically shifting gears according to a traveling state and a manual mode for shifting gears by a driver's operation, and the manual mode is selected by the shift mode selecting means. A control device for an automatic transmission, comprising: a shift operation detecting means for detecting a shift operation of a driver in a state; a driving environment detecting means for detecting an environment in which drive wheels are likely to slip; and a vehicle speed for detecting a vehicle speed Detecting means; high-gear position start mode setting means for setting the starting gear to a high gear other than the first gear when an environment in which the driving wheels are likely to slip is detected by the traveling environment detecting means; In a state in which the high speed start mode is set by the speed start mode setting means, the manual mode is selected by the speed mode selection means, A high-gear position start mode for releasing the high-gear position start mode when a speed change operation of the driver is detected by the speed change operation detection means in a state where the vehicle speed detected by the vehicle speed detection means is equal to or higher than a predetermined vehicle speed; A control device for an automatic transmission, comprising: a release unit. 6. A driving environment detecting means for detecting an environment in which the driving wheels are likely to slip, a vehicle speed detecting means for detecting a vehicle speed, and starting when the driving environment detecting means detects an environment in which the driving wheels are likely to slip. High speed start mode setting means for setting the speed at the time to a high speed other than the first speed;
When the high speed start mode is set by the high speed start mode setting means, and the vehicle speed detected by the vehicle speed detection means is equal to or higher than a predetermined vehicle speed, the high speed start mode is set. A control device for an automatic transmission, comprising: a high speed start mode release means for releasing. 7. The vehicle according to claim 4, further comprising a predetermined vehicle speed changing means for changing a predetermined vehicle speed as a condition for releasing the high speed start mode in accordance with the characteristics of the traveling road. A control device for an automatic transmission according to any one of the above. 8. The control device for an automatic transmission according to claim 7, wherein the predetermined vehicle speed changing means uses a road width of the traveling road obtained by the navigation system as the characteristic of the traveling road.