JP3458575B2 - Transmission 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 shift control device for an automatic transmission, and more particularly to improvement of a shift control device having a manual mode.

[0002]

2. Description of the Related Art A shift control device for an automatic transmission used in a vehicle is set to an automatic shift mode in which a target gear ratio i * is determined in accordance with operating conditions such as a vehicle speed VSP and a throttle opening TVO (or accelerator opening). In addition, similar to the conventional manual transmission, there are some known ones having a manual mode in which a predetermined gear ratio set in advance is selected according to a gear shift operation of a driver. Kaisho 60-
Some are disclosed in Japanese Patent No. 26847.

This is because when a continuously variable transmission is adopted as the automatic transmission, the gear ratio of the continuously variable transmission is set according to the shift position of the shift lever in the manual mode.
The driver can select a desired gear ratio regardless of the vehicle speed VSP and the throttle opening TVO.

In addition, the quarterly "MOVE 1995 SPR"
ING 01 ”(published on April 28, 1995 by Yamaei Shobo), pages 123 and 128, one shift lever is known to selectively switch between the automatic shift mode and the manual mode. .

As shown in FIG. 9, in the manual mode of the automatic transmission, the selector switch 5A of the shift lever 5 is provided with the UP switch 8 and the DOWN switch 9, respectively, and the shift lever 5 is operated in accordance with the operation thereof. It is conventionally known that the target gear ratio i * is relatively changed, and if the shift lever 5 is operated from the automatic gear shift mode "D" to the left side in the figure, a manual mode similar to a conventional manual transmission is obtained. And shift lever 5 is shown as “+” in the figure.
When the stroke is made to the side, the UP switch 8 is turned ON to instruct an upshift, and similarly, the shift lever 5
Is stroked to the "-" side, the DOWN switch 9 is turned on to instruct a downshift, and the gear ratio is relatively changed with respect to the current gear ratio (or shift position). The shift control is hereinafter referred to as sequential shift. In addition, "P", "R", and "N" in the figure respectively indicate parking, reverse, and neutral.

Further, even in the shift control device of the continuously variable transmission capable of continuously changing the gear ratio, the above sequential shift can be easily realized as the manual mode in addition to the automatic shift mode. For example, as shown in FIG. 10, the number of gear stages in the manual mode is 6, and the gear ratio i is set according to each gear stage GP = 1 to 6.
(1) to i (6) are set in advance, and the transmission gear ratio i (n) is sequentially relatively changed step by step according to the operation of the UP switch 8 or the DOWN switch 9 of the shift lever 5 as shown in FIG. By switching, it is possible to perform a gear shift operation similar to that of a manual transmission.

[0007]

However, in the shift control device for an automatic transmission as described above, when the shift lever is operated to the manual mode and downshifting or upshifting is performed, only one shift can be performed at any one time. Because there is no
For example, when performing a shift such as jumping from the 5th speed to the 3rd speed on a mountain road having continuous corners, in FIG. 9, the shift lever 5 is stroked twice to the “−” side to move to the 5th position.
Since it is necessary to shift gears in the order of high speed, fourth gear, and third gear, the plurality of strokes not only complicates the gear shifting operation, but also causes a problem that rapid gear shifting operation cannot be performed.

Therefore, the present invention has been made in view of the above-mentioned problems, and in the manual mode of the automatic transmission in which the gear ratio is sequentially changed relatively, the shift of the automatic transmission capable of quick and easy interlaced shifting is possible. An object is to provide a control device.

[0009]

A first invention, as shown in FIG. 11, is a shift mode switching means 61 for selectively switching between an automatic shift mode and a manual mode of an automatic transmission 60 and the manual mode. Manual shift command means 6 for instructing upshift or downshift when selected
2 and when the shift mode switching means 61 is in the manual mode, the set value of the shift speed GP is set to an adjacent shift speed among a plurality of preset shift speeds in accordance with a command from the manual shift command means 62. In the shift control device for an automatic transmission, which includes a shift control means 63 for changing the gear ratio i of the automatic transmission 60 in accordance with the shift speed GP, the manual shift command means 62 is , A first gear shift command means 62A for instructing to change the gear stage GP one by one, and a plurality of gear stages GP having a predetermined number of stages n.
Second shift command means 62B for instructing to change each
And a shift lever 5, and the first and second speed change fingers are provided.
Instructing means 62A, 62B respond to the displacement amount of the shift lever 5
Operate sequentially.

[0010]

A second invention is based on the first invention, wherein the shift lever 5 is provided with the first shift command means 6
2A and the second gear shift commanding means 62B are sequentially operated. The reaction force generating means 6 in which the reaction force gradually increases in accordance with the increase in the displacement amount.
4 is provided.

[0012]

Therefore, according to the first aspect of the present invention, in the manual mode, the manual shift command means can perform the upshift or the downshift to relatively change the set value of the shift speed. And the second gear shift command means, the gear shift stage GP is changed step by step by the operation of the first gear shift command means, while the second gear shift command means is operated, a plurality of gear stages GP are provided. Since the gears are changed step by step, during normal traveling, the first gear shift command means sequentially shifts gears to adjacent gears one gear at a time, and the second gear shift command means shifts a predetermined number of gears at a corner of a mountain road. Thus, it is possible to easily and quickly jump over the adjacent shift speed and shift to a desired shift speed.

Since the manual gear shift commanding means is constructed such that the first and second gear shift commanding means are sequentially operated in accordance with the shift amount of the shift lever, the shift amount of the shift lever is changed in spite of one shift operation. The number of gears to be changed can be selected accordingly.

According to a second aspect of the invention, in the shift lever, the reaction force generating means is such that the reaction force increases stepwise in accordance with the increase of the shift lever in which the first gear shift command means and the second gear shift command means operate sequentially. Since the above is provided, the driver can easily recognize the number of gears to be selected by the reaction force applied to the shift lever.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a case in which an automatic transmission 1 having a manual mode in addition to an automatic transmission mode is constituted by a continuously variable transmission 10. The continuously variable transmission 10 is, for example, 2
The toroidal type continuously changes the gear ratio according to the tilt angles of the two power rollers 18 and 20.

The automatic transmission 1 includes a hydraulic control device 4 for controlling the gear ratio of the continuously variable transmission 10 in response to a command from the shift control controller 2.

In the continuously variable transmission 10, a forward / reverse switching device 40 is provided between the engine and the torque converter 12, and the hydraulic pressure supplied from the hydraulic pump 84 is controlled by the hydraulic control device 4. The ratio is changed. The torque converter 12 is provided as a starting element, and a lockup (LU) clutch (not shown) operates at a predetermined speed or higher to directly connect the engine and the input shaft of the continuously variable transmission 10.

The hydraulic control device 4 of the automatic transmission 1 includes a step motor 61 driven by the shift control controller 2 mainly composed of a microcomputer.

The shift control controller 2 is arranged in the continuously variable transmission 10 and the engine speed Ne and the throttle opening TVO input from the engine control controller 3, the selector position from the selector switch 5A of the shift lever 5. The input shaft rotation speed Nin and the output shaft rotation speed Nout (= vehicle speed VSP) from the input shaft rotation sensor 6 and the output shaft rotation sensor 7 are read, respectively, and the target gear ratio i * according to the driving state of the vehicle is calculated. . The output shaft rotation sensor 7 functions as a vehicle speed sensor that detects the vehicle speed VSP,
The shift control controller 2 calculates the vehicle speed VSP by multiplying the output shaft speed Nout by a predetermined constant.

Then, the shift control controller 2 drives the step motor 61 of the hydraulic control device 4 on the basis of the calculated target gear ratio i *, and the toroidal type continuously variable transmission 1
The tilt angle of the power rollers 18 and 20 of 0 is the target gear ratio I *.
It is driven to match.

Here, the shift control controller 2 is shown in FIG.
As shown in FIG. 3, an A / D converter 53 which is mainly composed of a CPU 50 that performs arithmetic processing, has a RAM 51 and a ROM 52 as storage means, and further reads a throttle opening TVO from the engine controller 3, and an engine controller as well. Engine speed N from 3
e, the rotation speeds Nin and Nout of the input / output shaft of the continuously variable transmission 10
Counter 54 for inputting (= VSP), shift lever 5
Digital I for reading signals from selector switch 5A, etc.
/ O55, and the step motor 6 of the hydraulic control device 4.
1 composed of a digital I / O 56.

Here, the ROM of the shift control controller 2
A plurality of shift maps corresponding to two shift modes of an automatic shift mode and a manual mode are stored in advance in the storage means such as 52. Since the shift maps correspond to these shift modes, the selector switch 5A of the shift lever 5 is As shown in FIG. 4, a shift mode switching means is provided which has an "H" type gate similar to that of the conventional example, and which selects one of automatic shift and manual shift in addition to the "D" range which is the automatic shift mode. In the manual mode, the manual mode changeover switch 13 is provided as a manual gear shift command means for sequentially changing the gear position relatively in accordance with the stroke of the shift lever 5 in the front-rear direction (vertical direction in FIG. 4). It has an UP switch 8 and a DOWN switch 9.

Here, as shown in FIG. 5, the UP switch 8 for instructing the shift control controller 2 to perform an upshift is turned on at a predetermined stroke of the shift lever 5 to instruct an upshift of the first speed. Switch 8A
And when the shift lever 5 is further stroked
The second UP switch 8B for instructing the upshift of the second speed is provided, and these switches are the shift lever 5
By making sliding contact with the shoes 5B, 5C provided on the side, electrical connection is established.

Similarly, the DOWN switch 9 for instructing the shift control controller 2 to perform a downshift is turned on at a predetermined stroke of the shift lever 5 as shown in FIG.
The UP switch includes a first DOWN switch 9A for instructing a downshift of the first speed and a second DOWN switch 9B for instructing a downshift of the second speed that is turned on when the shift lever 5 is further stroked. 8
Similarly, these switches are brought into electrical conduction by slidingly contacting the shoes 5B and 5C provided on the shift lever 5 side. The first UP switch 8A and the first DOWN switch 9A serve as the first shift commanding means, and the second UP switch 8B and the second DOWN switch 9B serve as the second shift commanding means, respectively.
It constitutes a shift command means.

The shift lever 5 operated to the manual mode is constantly urged by the elastic member (not shown) toward the neutral state shown in FIG. 5, and is directed toward the first UP switch 8A or the first DOWN switch 9A. When the shift lever 5 is stroked, the reaction force applied to the shift lever 5 increases, and further, after the first UP switch 8A or the first DOWN switch 9A is turned ON, further toward the second UP switch 8B or the second DOWN switch 9B. When the stroke of the shift lever 5 is set, the reaction force applied to the shift lever 5 is set to further increase, and the increase of this reaction force is set in a substantially stepwise manner. From the first UP switch 8A to the second UP switch 8B based on the size of
Can be recognized as being turned on in sequence, and the DOWN switch 9
Is also the same. The reaction force generating means for applying a stepwise reaction force according to the displacement of the shift lever 5 is composed of an elastic body such as a spring (not shown).

Incidentally, the gear stage in the manual mode is shown in FIG.
As in the conventional example shown in FIG.
The gear ratio map is set in advance. Here, the case where the gears are composed of six gears GP as in the conventional example is shown, and the gear shift map in the manual mode is 1st gear to 6th gear = 1.
6 to 6, predetermined gear ratios i (1) to i (6) are respectively set, and these gear ratios i (n) are set to the Hi side, that is, the gear ratio decreases in accordance with the increase of the gear stage. Is set.

On the other hand, when the "D" range automatic shift mode is selected by the shift lever 5, the vehicle speed VSP and the throttle opening T are the same as in the conventional shift control device for an automatic transmission.
The automatic shift mode in which the target gear ratio i * is determined by a shift map (not shown) corresponding to VO (or accelerator opening) is entered.

Here, as for the outline of the control in this embodiment, as shown in FIG. 3, the shift control controller 2 controls the vehicle speed VSP based on the signal Nout from the output shaft rotation sensor 7 and the throttle opening sensor 30 of the engine control controller 3.
Throttle opening TVO, gear change mode detected from the manual mode selector switch 13 of the selector switch 5A, UP switch 8 or D of the selector switch 5A
A signal from the OWN switch 9 (the first UP switch 8A,
First DOWN switch 9A or second UP switch 8
B, the second DOWN switch 9B) is input, and a predetermined pulse is output to the step motor 61 of the automatic transmission 1.

The manual mode selector switch 13
As shown in FIG. 4, is provided in the middle of the "H" type gate that connects the automatic shift mode on the right side and the manual mode on the left side.

Next, an example of the control performed by the shift control controller 2 is shown in the flow charts of FIGS. 7 and 8, and will be described in detail with reference to these flow charts. It should be noted that each flow chart is executed every predetermined time, for example, every 10 msec.

In step S1 in FIG. 7, data is read from various sensors to detect the driving state of the vehicle.
The engine speed Ne and the throttle opening TVO are read from the engine control controller 3, and the input shaft speed Nin, the output shaft speed Nout (vehicle speed VSP), the selector switch 5A of the shift lever 5 and the UP switch 8 are read from the automatic transmission 1. , The signal from the DOWN switch 9 is read.

Then, in step S2, the signal from the manual mode changeover switch 13 of the selector switch 5A is read to determine whether the current shift position is in the manual mode or the automatic shift mode, and as shown in FIG. If the shift lever 5 is operated to the left side in the drawing in the manual mode, the process proceeds to step S3. If the shift lever 5 is operated in the automatic shift mode operated to "D" in FIG. 4, the process proceeds to step S4. As described above, the target gear ratio i * is set according to the vehicle speed VSP and the throttle opening TVO.

On the other hand, the manual mode shift control performed in step S3 is performed in steps S10 to S1 shown in FIG.
This manual mode shift control will be described in detail below based on the flowchart of FIG.

First, in step S10, the shift lever 5 is operated to the upshift side to move the first UP switch 8A.
Is changed from OFF to ON (rise of signal), and if the shift lever 5 strokes a predetermined amount or more and the first UP switch 8A is ON, the process proceeds to step S11, and the current gear position GP is reached. 1 is added to set upshift for the 1st speed.

Then, in step S12, the shift lever 5 further travels to the upshift side to make the second UP.
It is determined whether the switch 8B has changed from OFF to ON (rising of the signal), and if ON, it is determined that the driver has requested a quick upshift, and the process proceeds to step S13.
Further, 1 is added to the shift speed GP incremented in step S13, and the shift speed GP is set so as to skip one shift speed and perform an upshift of two shift speeds.

On the other hand, after step S14, the same control is performed on the downshift side as on the upshift side. First, in step S14, the shift lever 5 is operated to the downshift side and the first DOWN switch 9A is turned on.
It is determined whether FF has changed to ON (rising of the signal), and if the first DOWN switch 9A is ON, the process proceeds to step S15, and 1 is subtracted from the current gear position GP.

Then, in step S16, the shift lever 5 further strokes to the downshift side, and the second D
It is determined whether the OWN switch 9B has changed from OFF to ON (rising of the signal), and if it is ON, it is determined that the driver has requested a quick downshift, the process proceeds to step S17, and the gear shift subtracted in step S15 1 is subtracted from the gear position GP to reduce the target gear position GP to the second gear,
P is set so as to jump over by one step and downshift by two steps.

In the present embodiment, although not shown,
The minimum value of the gear position GP is restricted to 1 and the maximum value is restricted to 6.

Then, in step S18, the gear position GP
After determining the target gear ratio i * according to the above, the process returns to the main routine of FIG. 7, and in step S5, the continuously variable transmission 10
The actuator such as the step motor 61 is driven so that the actual gear ratio of (1) matches the target gear ratio i *.

As described above, in the manual mode of the automatic transmission 1, the UP switch 8 and the DOWN switch 9 of the shift lever 5 for sequentially changing the gear ratio (gear stage) relatively are changed to the first switch (first UP). A switch 8A and a first DOWN switch 9A (hereinafter, simply referred to as a first switch) and a second switch (a second UP switch 8B, a second DOWN switch 9B, hereinafter simply referred to as a second switch), When only the first switch is turned on, an upshift or a downshift is performed in the first gear, which is the normal number of gear stages, while when the second switch is turned on in addition to the first switch, one step is skipped. It becomes possible to perform a fast upshift or downshift, and it is not necessary to operate the shift lever 5 a plurality of times as in the conventional example. It is possible to quickly perform an interlaced shift with one stroke. For example, in the case of downshifting from the 5th speed to the 3rd speed or the 4th speed to the 2nd speed on a mountain road where the corners are continuous, As shown in FIG. 5, the shift operation is completed simply by making the shift lever 5 stroke to the "-" side in the drawing to the position where the second DOWN switch 9B is turned ON, and the interlaced shift can be performed easily and quickly. This makes it possible to improve the drivability of the automatic transmission provided with the manual mode, as compared with the conventional example.

The shift lever 5 is constructed so that the first switch and the second switch are sequentially turned on according to the magnitude of the stroke, and the shift lever 5 is biased to the neutral position shown in FIG. Since the reaction force to turn on the second switch is set to be larger than the reaction force to turn on the first switch, the driver can easily change the reaction force applied to the shift lever 5 from the reaction force applied to the shift lever 5. By recognizing the operating state of the first or second switch, the number of gears can be surely known, and the drivability of the automatic transmission having the manual mode can be further improved.

In addition, the UP switch 8 and the DOWN switch 9 for issuing the shift command in the manual mode are respectively set to the first position.
Since the second switch is provided, even if one of the switches fails, the remaining one of the first and second switches can shift the speed, and the reliability of the manual mode of the automatic transmission can be improved. It is possible to improve the sex.

In the above embodiment, an example in which the manual changeover switch 13, the UP switch 8, and the DOWN switch 9 are operated according to the displacement of the shift lever 5 is shown, but although not shown, these switches are used as handles or It can also be placed on the steering column or instrument panel.

In the above embodiment, the automatic transmission 1 is composed of the continuously variable transmission 10. However, although not shown, it is composed of a conventional planetary gear type automatic transmission. Can also obtain the same action and effect.

[0046]

As described above, according to the first aspect of the invention, in the manual mode, the manual shift command means can perform upshift or downshift to relatively change the set value of the shift speed. By configuring the gear shift command means from the first and second gear shift command means, the gear position GP is changed step by step by operating the first gear shift command means, while the second gear shift command means is operated. Step G
In order to change P by a predetermined plurality of gears, during normal traveling, the first gear shift command means sequentially shifts to adjacent gears one gear at a time, and at a corner such as a mountain road, the second gear shift command means makes a predetermined plurality of gear shifts. By shifting gears step by step, it is possible to easily and quickly jump over adjacent gears and shift to a desired gear, and it is possible to change the number of gears according to the driving situation and the driver's preference. Therefore, the operability of the automatic transmission having the manual mode can be improved.

Further , since the manual gear shift command means is constructed so that the first and second gear shift command means are sequentially operated in accordance with the shift amount of the shift lever, the shift amount of the shift lever is changed in spite of one shift operation. The number of gears can be changed accordingly, and when shifting is performed by skipping adjacent gears, it is not necessary to operate the shift lever a plurality of times as in the conventional example, and a quick gear shift operation can be performed. You can
It is possible to further improve the operability of the automatic transmission having the manual mode.

According to a second aspect of the invention, in the shift lever, the reaction force generating means is such that the reaction force increases stepwise in accordance with an increase in the shift lever with which the first gear shift command means and the second gear shift command means operate sequentially. By providing the above, the driver can easily recognize the number of gears to be selected by the reaction force applied to the shift lever, and it is possible to further improve the operability of the automatic transmission having the manual mode.

[Brief description of drawings]

FIG. 1 is a block diagram of an automatic transmission showing an embodiment of the invention.

FIG. 2 is a block diagram showing details of a shift control controller.

FIG. 3 is a conceptual diagram of shift control in manual mode.

FIG. 4 is a plan view of a shift lever and a select switch.

[Fig. 5] Similarly, shift lever, UP switch, and DOWN
It is a side view of a switch.

FIG. 6 is a stroke of a shift lever and first and second U
It is a graph which shows the relation of the operating state of P or a DOWN switch, and the relation of reaction force.

FIG. 7 is a flowchart showing an example of control performed by the shift control controller, showing a main routine.

FIG. 8 is a flowchart showing a subroutine of manual mode control.

FIG. 9 is a plan view of a shift lever and a select switch of a conventional automatic transmission.

FIG. 10 is a shift map showing a manual mode of a continuously variable transmission, showing a relationship between a target input shaft rotation speed and a vehicle speed.

FIG. 11 is a claim correspondence diagram corresponding to any one of the first to third inventions.

[Explanation of symbols]

2 Shift control controller 3 Engine control controller 4 Hydraulic control device 5 shift lever 8 UP switch 8A 1st UP switch 8B 2nd UP switch 9 DOWN switch 9A 1st DOWN switch 9B 2nd DOWN switch 10 continuously variable transmission 13 Manual changeover switch 40 Forward / reverse switching device 50 CPU 51 RAM 52 ROM 53 A / D 54 counter 55, 56 Digital IO 60 automatic transmission 61 speed change mode switching means 62 Manual shift command means 62A First gear shift command means 62B Second shift command means 63 Shift control means 64 Reaction force generation means

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16H 59/00-63/48 B60K 20/00-20/08

Claims (2)

(57) [Claims] 1. A shift mode switching means for selectively switching between an automatic shift mode and a manual mode of an automatic transmission; a manual shift command means for instructing an upshift or a downshift when the manual mode is selected; When the shift mode switching means is in the manual mode, the set value of the shift speed is relatively changed to an adjacent shift speed among a plurality of preset shift speeds in accordance with the instruction from the manual shift command means. In a shift control device for an automatic transmission, which comprises a shift control means for changing a gear ratio of the automatic transmission according to the shift speed, the manual shift command means changes the shift speed one by one. comprises a first shift command means for instructing a second shift command means for instructing to change the gear position by a predetermined plurality of stages, a shift lever, Serial first and second shift command means
Is a gear shift control device for an automatic transmission, which sequentially operates according to the amount of displacement of the shift lever . 2. The shift lever, wherein the first gear shift command means and the second gear shift command means operate sequentially.
Reaction force that gradually increases as the amount of displacement increases
The shift control device for an automatic transmission according to claim 1 , further comprising a generating unit .