JPS6192352A - Controller of automatic transmission gear - Google Patents

Abstract

PURPOSE:To enable any transmission shock to be suppressed during transfer phase of up/down shift point by making transmission gear control in compliance with a shift pattern changed by a pattern modification means after the shift pattern is changed. CONSTITUTION:An actuator 6 in charge of speed change operation of a transmission gear 3 is designed to be operated by output signals from a control unit 10 serving as a control means. Namely, said control unit 10 includes a preset shift pattern in its memory means 11, a proper speed change step complying with the operation condition(s) is selected along said shift pattern, and the signals matching said selected speed change step is output to the actuator 6. Therefore, any transmission shock at the time of transfer phase of up/down shift point can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for an automatic transmission installed in a vehicle, etc., and particularly to a control device that can change a pre-stored shift pattern of a transmission. Regarding.

2. Description of the Related Art Conventionally, there is a control device for an automatic transmission of this type, as disclosed in, for example, Japanese Patent Application Laid-open No. 59-37359. That is, in this control device, the speed change of the transmission is controlled by a slow speed signal,
Shifting is performed according to a predetermined pattern based on the engine load signal and range position signal, and a shift-up instruction switch and a shift-down instruction switch are provided, and these switches can also be used to manually control the shift. It is now possible to do so.

Problems to be Solved by the Invention However, in such conventional automatic transmission control devices, it is necessary for the driver to operate a shift instruction switch each time the driver wishes to perform the desired shift. Therefore, the operation in this case becomes cumbersome, and the convenience of the automatic transmission is lost.

Furthermore, since there is only a shift instruction switch, an unnatural feeling occurs when it is desired to shift the upshift point to the high speed side or the downshift point to the low speed side. In other words, when moving the up foot point to the high speed side (the downshift point to the low speed side), the shift down (shift up) command switch must be operated after the gear has been shifted according to a predetermined shift pattern, and there is no shift shock. It happens a lot. Also, especially if you do not want to downshift when coasting,
The problem was that it could not be dealt with.

Measures to Solve the Problems Therefore, the automatic transmission control device of the present invention has been developed to solve the problems of the conventional art, and has a configuration as shown in FIG.

That is, the present invention includes a control means (b) in which a shift pattern for controlling the gear position of the transmission (al) according to operating conditions such as first speed and engine load is stored in advance.

A shift point change instructing means (cl) having a function of prohibiting the control means (b) from upshifting or downshifting of the shift pattern as well as shifting, and a signal from the shift point change instructing means (cl) to control the shift pattern. After the shift pattern is changed, pattern changing means (al) is provided to control the gear position according to the changed shift pattern.

Operation With the above configuration, the operation of the present invention is that after the shift pattern is changed by the shift point change instruction means (c), the shift is controlled according to the shift pattern changed by the pattern change means (d). This not only greatly improves operability, but also suppresses shift shock when transitioning between up and down shift points.

Furthermore, by providing the shift point change instructing means (c) with a shift prohibition function, it is possible to prevent the gear from being shifted along the shift pattern during coasting, etc., and it is possible to run at a constant gear.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

That is, FIG. 2 schematically shows an embodiment of the present invention, in which one rotation of the engine is changed to 4!13 through the torque converter 2.
The engine rotation, which is input into the transmission 3 and changed as appropriate by the transmission 3, is transmitted to the driving wheels 5 via the differential gear 7 and the gear 4.
．． It is designed to be transmitted to 5 stations. 6 is the gear shift a
This Akusen unitaro is a control unit IO which is a control means.
It is activated by an output signal from. That is, in the control unit 10, a preset shift pattern is stored in the storage means 11, and a gear position corresponding to the driving condition is selected according to this shift pattern, and a gear position corresponding to the selected gear position is selected. A signal is output to the actuator 6. As means for detecting the driving conditions, a vehicle speed sensor 4-12 and a throttle opening sensor 13 are used, and the vehicle speed signal and engine load signal obtained by these sensors 4-12 and 13 are used. The information is input to the control unit 10.

Here, in this embodiment, a 7-foot-up switch 20. shift down switch 2
1 and a shift-up inhibit switch 22° and a shift-down inhibit switch path are provided.

The shift up switch 20. The shift down switch 21 outputs an ON signal when operated, and is OFF otherwise.
A signal is output to the control unit 1o, and for example, momentary type switches are used as the switches 20 and 21. These shift up switches 20. By turning on the shift down switch 21, the intention of 7-lift up and 7-shift down is input and held in the control unit io.

On the other hand, when the shift-up prohibition switch 22 and the shift-down prohibition switch 23 are operated with a - finger, they issue an ON signal, and when the shift-up switch 2° or the shift-down switch 21 is operated, or when the vehicle speed is set to a predetermined speed. The ON signal continues to be emitted until it reaches .

By the way, 30.31.32 is the first shift pattern that switches the shift pattern stored in the storage device to 31!11. Second
, by turning on the first selection switch 3o with the third selection switch, an economy (E) pattern emphasizing fuel efficiency as shown in FIG. 3 can be obtained, and then turning on the second selection switch 31.
By doing so, a power fil pattern as shown in FIG. 4 is obtained, and by turning on the third selection switch 32, a free (Fl pattern) matched to the driver's preference as shown in FIG. 5 is obtained. Therefore, by turning on the third selection switch 32 to set the free pattern, the operation by the shift up/down switch 20.21 and the shift up/down prohibition switch 22.23 is disabled. It is supposed to be done.

Furthermore, in this embodiment, the control unit [
0 is provided with a pattern changing means 24, and the shift up switch 2o and the shift down switch 21
After the shift point of the pre-stored)l-(Fl pattern is changed, the pattern changing means 24 changes the speed change point of the storage means 11 according to this changed pattern.
(The Fl pattern is changed.

%40 is a display device, which displays the gear position of the transmission 3 to the driver, as will be described later.

Hereinafter, the speed change control of this embodiment will be described based on the flowchart shown in FIG. 6 (Al, (Bl).

First, when the program starts, step 1000
Read the vehicle speed from the 1st gear sensor 1-12 signal, then throttle 7'+13 for Stella 7' 2000.
Read the throttle opening (TvO) from the signal.

In the next step 3000, the first. g2. Third
The switching positions of the selection switches 30, 31, and 32 are cut off, and the economy (E) pattern, power (Pil pattern, and free (Fl pattern) are determined. If the shift pattern is the E pattern or the P pattern, step 4000 Steps 1000 and 20 are performed from the shift patterns shown in FIG. 3 or 4 corresponding to the respective patterns previously stored in the storage means 11.
00, determine the gear shift position based on the vehicle speed and throttle opening, and use the result as a flag (G
RNEW).

Next, in step 5000, the above-mentioned GRNEW flag and a flag (GROLD) indicating the current gear position are set.
If they are equal, the process proceeds to step 6000, where a display control signal indicating the current shift position is displayed on the display device fj.
Output to f40 and return to step ]000. Step 5
If the values of the two flags are different at 000, that is, if the gear position changes, the process proceeds to step 5100, and the GR
The shift position corresponding to the flag value of OLD is canceled and the GRN
A shift control signal is output to the actuator 13 to achieve a shift position corresponding to the value of the EW flag. continue,
In step 5200, the value of the GROLD flag is set to GRN.
I! The iW flag is changed to the beginning of the flag, and the process proceeds to step 6000, where the current shift position is displayed based on the updated GROLD flag value.

Next, in step 3000, if it is determined that the pattern is Fl - (Fl), the process of step 3000 following step 3100, which will be described later, is performed.
In 71J, shift up switch (up-avr)
20. Shift down switch (DOWN-8vr
) 21 and shift up prohibition switch (up prohibition 8W) 22. Shift down prohibition switch (T) OW
N prohibition sw) Controls the shift based on ON/OFF of 23, and further changes the shift pattern.

Also, as a safety measure, there is a shift down switch 21.

If the shift-up prohibition switch 2 is turned on,
2 is ON, the engine speed is calculated from the vehicle speed and gear ratio, and if there is a risk of engine shift (D overrun), the system prohibits downshifting or sets the upshift prohibition switch 22. Furthermore, if the shift-up prohibition switch 22 is turned on and the driver does not wish to shift up, the shift-up is automatically performed in consideration of engine overrun conditions and acceleration performance. I'm trying to upload it.

This acceleration performance will be explained based on the characteristic diagram shown in FIG. That is, FIG. 7 shows that if the throttle opening is fixed at a certain value (for example, 5A or 7A), the acceleration time at each gear stage gradually decreases as the vehicle speed increases. It is also mentioned that the first speed is obtained when the vehicle speed is from 0 to V12, the second speed is obtained from bVH to VtS, and the third speed is obtained as the greatest acceleration among the respective gears when the vehicle speed is above VtS. Therefore, under this throttle opening condition, by performing a 1->2 shift at Vat and a 2->3 shift at Vt3, the Nk can also be expected to be accelerated.

Such characteristics are determined for various throttle openings depending on engine performance, torque converter performance, transmission gear ratio, etc., and may be stored in advance, or each of these characteristics may be stored and calculated each time. It's okay. and,
V□, ■2. When the vehicle speed reaches the maximum acceleration required to achieve maximum acceleration, the upshift is automatically performed even if the upshift prohibition switch 22 is ON. This prevents the engine from accelerating in a low gear until the engine speed increases more than necessary, resulting in poor fuel efficiency and poor acceleration.

Next, the processing from step 3100 onwards will be explained.

Step 3100: 7 lift-up switch 20 O
N.

07F is determined, and if it is ON, the process proceeds to step 3110, and it is determined whether or not the transmission gear is at the top, and if it is the top, the process proceeds to step 3250, which will be described later. If it is not the top, a new shift position is indicated in step 3120c.
GROL' indicating the current gear shift position in the iuNxw flag
@□Deposit the value of the D flag plus rlJ ( GR
NI! iW=GROLD+1). Next, in step 3130, the speed and throttle opening read in step 1000 and step 2000 are determined.
("!'VO). In other words, in FIG.
When 0 is turned on, if the throttle opening is in the Bj section, the shift pattern, which until now had the true speed v4 as the shift point, is changed to the vehicle speed v in the Bj section.

Change the pattern to the shift point. In addition, when the shift-up switch 20 is turned on at point 11 in FIG. 5 after the shift-up prohibition switch 22 is operated, the vehicle speed is changed from "vl" to "V" in the throttle opening section A1. Then, step 3250
7, the flags (uPNGFLG and DW) LM()F'LG) for inhibiting lift-up and downshift are turned OFF, and the process proceeds to step 5100 described above.

At step 3100, the shift up switch 20 is turned to
If F'F, the process proceeds to step 3200, where it is determined whether the downshift switch 21 is ON or OFF. and,
When the shift down switch 21 is ON, the process proceeds to the above-mentioned Stella 7'6000; otherwise, the process proceeds to step 3220.
The engine rotation is calculated from the current vehicle speed and the gear ratio when the vehicle is down 7 feet, and the possibility of engine overrun is determined. If there is a possibility, the process advances to step fi000. If there is no possibility, step 3230 sets GRN]nW = GROLT) -1 for the downshift, step 3240 changes the downshift point to the above-mentioned upshift change, and performs the above-mentioned step 3250.
Proceed to.

At step 3200, the shift down switch 21 is turned to O.
If it is FF, proceed to step 3300 and turn ON the flag (uFNGII'LG) that prohibits upshifting.
, 0IPIF. If ON, step 33]
0, from the current gear position and vehicle speed, determine whether engine overrun is possible or not, and if there is a possibility, proceed to step 3330, and press GRNKW for upshift.
= GROLD +1, and in step 3340, based on the vehicle speed and throttle opening read in step 1000 and step 2000, a shift pattern is performed in the same manner as in step 3130 described above. Subsequently, in step 3350, uPNGFLG is turned off, and the process proceeds to step 5100 described above. Step 33: If the result is 0 and there is no possibility of overrun, as explained in FIG.
0 is compared with the data stored in advance, and if it exceeds the above-mentioned step 3330, the following processing is performed, and if not, the process proceeds to step 3600, which will be described later.

If uPNGF'l, G are OFF in step 3300, the process proceeds to step 3400, where it is determined whether the upshift prohibition switch 22 has been turned on, and if it is OFF, the process proceeds to step 3500. uPIJGFL prohibits upshifting in step 341o when ON
G is turned ON and downshifting is prohibited in step 3420. I) Turn off WIJNGPLG and proceed to step 6000.

At step 3400, shift up prohibition switch 22
It is determined whether the downshift prohibition 7-F (DWNNGFLG) is ON or OFF, and the process proceeds to step 3500.
510I, and it is determined whether the read vehicle speed is less than or equal to a predetermined minimum vehicle speed. If the vehicle speed is below the minimum vehicle speed, in step 3511, a value obtained by subtracting "1" from the flag value of GROL'D is stored in the flag (GRNKW) indicating the new shift position for downshifting (GRN11iI
IJ=GROLD-1). Then step 3512
Change the shift pattern in the same way as above,
In step 3513, DWNFLG is turned OFF.

Thereafter, the process proceeds to step 6000. On the other hand, step 3
If it is determined in step 510 that the vehicle speed is equal to or higher than the minimum vehicle speed, the process directly proceeds to step 6000.

If DWNNGFLG is OFF in step 3500;

At step 3600, the shift down switch 21 is turned to O.
Determine whether it is N or not, and if it is ON, step 3610
Proceed to and set the downshift prohibition flag (DWNNGF).
LG) is turned ON, and then the upshift prohibition flag (uPNGFLG) is turned OFF', and step 60
If the downshift prohibition switch 23 is OFF at step 3600, advance to step 4000 and go free) (Fl pattern shift diagram, Haruka speed and TV
Select the shift position from O, and select the 1st shift corresponding to the dragon at that position.
stored in the RNKW flag and executed in step 5000 described above.
Perform the following processing.

)l-(Fil pattern initial value, for example if
The f-speed point is set to be midway between the economy fil pattern and the power fil pattern.

It is also possible to have multiple switches for selecting free fFl patterns, in which case it is possible for one driver to create several patterns;
When several drivers drive the platform (■), it is also possible to create a pattern to each driver's preference.

As described in detail of the invention, in the automatic transmission control device of the present invention, when the shift point change instruction means receives a shift point instruction from the driver, not only at the time of the instruction, but also at the time when the instruction is given, the automatic transmission control device of the present invention The shift pattern is also changed by the transmission means so that the gears are shifted at the instructed shift point, and thereafter the gears are shifted at that shift point even without the driver's instruction, so that the shift point can be changed to match the driver's preference. In other words, once you specify where you want to shift, the system will continue to work at that shift point for smooth gear changes. Therefore, it is possible to significantly suppress or prevent a shift shock when changing a shift point, and the shift is always easily carried out according to the driver's wishes, so that the driver can enjoy a comfortable drive.

In particular, when coasting, some drivers want to gear down early to apply engine braking, while others do not want engine braking to be applied by gearing down. The excellent effect is that once you manually specify a gear down to suit your needs, it can be executed automatically from the second time onwards.

Historically, in the embodiments of the present invention, countermeasures against engine overrun are automatically taken, and even if the driver prohibits upshifting, the acceleration in that gear is not as good as that in the next gear. When the vehicle speed becomes lower,
Since it automatically shifts up by one knot, meaningless prohibition of upshifting is prevented, which also has the effect of greatly improving safety and efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the concept of a control device for an automatic transmission according to the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. Characteristic diagrams showing examples of the shift patterns used, FIG. 6 (Al
, (Bl is a flowchart used as an embodiment of the control of the present invention, and FIG. 7 is a characteristic diagram showing the relationship between acceleration and acceleration at a constant throttle opening by each gear of the transmission. 1. ...Engine, 3... Gear shift m, to... Control unit (control means), 20 - Shift up switch (shift point change instruction means), 21... Shift down switch (K far point change instruction means) , 22... Shift-up prohibition switch (shift point change instruction means), 23...
Soft down prohibition switch (K far point change instruction means), U
...Means for changing patterns. ni'D to Nigo Shigo ()->O) Pillow outside Esa proof wing (1->O)

Claims (1)

[Claims] (1) In an automatic transmission control device that controls gears according to a shift pattern stored in advance in a control means in accordance with driving conditions such as vehicle speed and engine load, changing the shift point stored in the shift pattern. and after the shift pattern is changed by a signal from the shift point change instruction means, a pattern change is provided to control the gear position according to the changed shift pattern. 1. A control device for an automatic transmission, characterized by comprising means.