JPH04341657A - Shift pattern select controller of automatic transmission - Google Patents

Abstract

PURPOSE:To perform the select control of a power pattern so optionally according to the individuality of a driver by renewing compensation data on the basis of accelerator work of the driver, and compensating the reference select judging data of accelerator operating speed by means of the compensation data. CONSTITUTION:Reference select judging data of accelerator operating speed detected by a means (d) and compensation data are set each by each of maps (e), (f) according to throttle opening and car speed detected by each of means (b), (c). In addition, the compensation data are renewed by a means (g) under the specified running conditions. Moreover, each of data is extracted from the maps (e), (f) by respective means (h), (i), while these extracted data are summed up by a means (j), operating the select judged value. When the accelerator operating speed goes beyond this select judged value and a usual shift pattern is selected by a means (a), it is selected to a shift pattern, where a yet more powerful run is securable, by a means (k). With this constitution, optimum select control conformed to an intention of each driver is thus performed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift pattern switching control device for an automatic transmission that automatically switches between two or more set shift patterns by electronic control based on accelerator work.

0002

2. Description of the Related Art Conventionally, as a shift pattern switching control device for an automatic transmission, for example, "Automotive Engineering Vol. 37
No. 7” (June 1986; Published by Railway Japan Co., Ltd.)
The one described on pages 214 to 249 of .

[0003] In the above conventional source, the shift pattern is set as an economy pattern suitable for normal driving, and a power pattern suitable for when more powerful driving is desired, such as when climbing a hill or overtaking. If you select , the technology is shown to automatically switch between the economy pattern and the power pattern depending on the driver's accelerator work (accelerator pedal speed).

0004

However, in the conventional automatic transmission shift pattern switching control device described above, the switching from the economy pattern to the power pattern is determined based on the accelerator depression speed depending on the throttle opening degree and vehicle speed. Since this is done using a switching judgment data map in which switching judgment data is set based on a fixed value of Even though it is required, the power pattern switches, resulting in variations in usability.

That is, in the case of a driver who performs accelerator work at a high accelerator depression speed, the driver tends to switch to the power pattern even when driving on a flat road, and the switching frequency becomes high. On the other hand, in the case of a driver who performs accelerator work with a high accelerator depression speed, the driver may not switch to the power pattern even when he/she wants the power pattern, such as when climbing a hill or overtaking, and the switching frequency becomes low.

The present invention has been made in view of the above-mentioned problems, and provides a shift pattern for an automatic transmission that automatically switches between two or more shift patterns set by electronic control based on accelerator work. In a switching control device, the objective is to obtain timing for switching to a power pattern that matches the desired intention of each driver, even if there are individual differences in accelerator work due to differences in driver personality.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the shift pattern switching control device for an automatic transmission of the present invention creates correction data while updating it at any time through learning control based on monitoring of the driver's accelerator work. This correction data is used to correct reference switching determination data for accelerator depression speed to control switching to a power pattern.

That is, as shown in the complaint correspondence diagram of FIG. 1, a shift pattern setting means a in which at least two or more shift patterns are set, a throttle opening detection means b for detecting the throttle opening, and a vehicle speed a vehicle speed detection means c for detecting the accelerator depression speed, an accelerator depression speed detection means d for detecting the accelerator depression speed, and a reference switching determination data map e in which reference switching determination data for the accelerator depression speed is set according to the throttle opening degree and the vehicle speed. and a correction data map f in which correction data for the accelerator depression speed is set according to the throttle opening degree and vehicle speed, and the correction data is updated by learning control while monitoring the accelerator depression speed under predetermined driving conditions. A correction data updating means g, a reference switching judgment data extracting means h for extracting reference switching judgment data according to a throttle opening detection value and a vehicle speed detection value from a reference switching judgment map e, and a throttle opening detection from a correction data map f. correction data extracting means i for extracting correction data according to the value and vehicle speed detection value, switching judgment value calculating means j for calculating a switching judgment value by adding the extracted judgment data and correction data, and accelerator depression speed detection. When the value exceeds the switching judgment value and the normal shift pattern is selected,
The present invention is characterized by comprising a shift pattern switching control means k that outputs a command to switch to a shift pattern that provides more powerful driving than a normal shift pattern.

[0009]

[Operation] First, in the correction data updating means g, the correction data set in the correction data map f is updated by learning control while monitoring the accelerator depression speed under a predetermined driving condition such as when the vehicle is traveling straight.

[0010] When the accelerator pedal is pressed suddenly while driving, etc., when the accelerator depression speed detection value from the accelerator depression speed detection means d exceeds the switching judgment value from the switching judgment value calculation means j. When the normal shift pattern is selected, the shift pattern switching control means k
, a command is output to switch to a shift pattern that provides more powerful driving than the normal shift pattern.

Here, the switching judgment value is determined by the reference switching judgment data extracted from the reference switching judgment map e in accordance with the throttle opening detection value and the vehicle speed detection value by the reference switching judgment data extracting means h, and the correction. In the data extraction means i,
It is obtained by adding together the correction data extracted from the correction data map f according to the throttle opening detection value and the vehicle speed detection value.

0012

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings.

The configuration will be explained.

FIG. 2 is an overall system diagram showing an automatic transmission to which a shift pattern switching control device according to an embodiment of the present invention is applied.

As shown in FIG. 2, the automatic transmission of the embodiment includes a torque converter 2 as a main transmission connected to an engine 1, and a planetary gear 3 as a sub-transmission. And gear shift clutches and brakes as gear shift elements 4
is mounted together with the planetary gear 3, and a control valve 5 is provided as a hydraulic control means for engaging or releasing the transmission clutch/brake 4 according to each shift position.The control valve 5 is pressurized by an oil pump 6. Oil is supplied. In addition, the control valve 5 has
As control actuators, line pressure solenoid 7, lock-up solenoid 8, shift solenoid A9, shift solenoid B10, timing control solenoid 11
is attached.

[0016]Then, each of the solenoids 7, 8, 9, 1
0 and 11 respectively indicate a clutch hydraulic pressure activation signal,
A control unit 12 (based on a microcomputer) that outputs a lock-up activation signal, a shift command, a shift command, and a hydraulic timing signal is connected. This control unit 12 includes, as a means for obtaining input information,
Oil temperature sensor 13, throttle sensor 14 (corresponding to throttle opening detection means), engine rotation sensor 15, vehicle speed sensor 16 (corresponding to vehicle speed detection means), inhibitor switch 17, AT mode switch 18, ASCD switch 1
9 is connected. A power pattern indicator 20 is also connected to the control unit 12, which lights up in the vehicle interior when the power pattern is selected as the shift pattern.

The throttle sensor 14 is connected to the engine 1.
A potentiometer type sensor attached to the throttle chamber of the engine outputs a signal corresponding to the throttle opening TVO.

The vehicle speed sensor 16 is a pulse pickup type sensor installed at the output shaft position of the transmission, and is a pulse pickup type sensor installed at the output shaft position of the transmission.
Outputs a signal according to SP.

The AT mode switch 18 is a three-position changeover switch between power position, auto position, and snow position. When the power position is selected, the shift pattern is fixed to power pattern PP, and when the auto position is selected, the driver's shift pattern is fixed. The economy pattern EP and the power pattern PP are automatically switched in accordance with the accelerator work, and when the snow position is selected, the shift pattern is fixed to the snow pattern SP.

The memory of the control unit 12 has an economy pattern EP suitable for normal driving as shown in FIG. 8 and a power pattern PP suitable for powerful driving as shown in FIG. 9 in its shift pattern storage section.
A snow pattern SP (not shown) suitable for driving on snowy roads is stored and set (corresponding to shift pattern setting means). Also,
As shown in FIG. 5, the reference switching determination data Da (10
Standard switching judgment data map M in which the throttle opening change angle at 0msc is set according to the throttle opening and vehicle speed.
1, and as shown in FIG. 6, the accelerator depression speed ΔTVO
A correction data map M2 in which correction data anm of is set according to the throttle opening degree and vehicle speed is stored and set.

[0021] The action will be explained.

FIG. 3 is a flowchart showing the flow of processing operations for updating the correction data anm of the correction data map M2 (corresponding to the correction data updating means), and each step will be explained below. Note that this correction data update process is performed, for example, by a regular interrupt process every 100 msec, and is performed under driving conditions such as when the steering angle is within ±10° or when the vehicle speed is above a predetermined time for a predetermined period of time. be done.

In step 50, the throttle opening TVO
is loaded.

At step 51, vehicle speed VSP is read.

In step 52, the accelerator depression speed ΔTVO is calculated from the absolute value of the difference between the current throttle opening TVO and the previous throttle opening TVOM (corresponding to accelerator depression speed detection means).

In step 53, the current throttle opening TVO is stored in the memory as the previous throttle opening TVOM.

In step 54, correction data anm is calculated according to the detected throttle opening TVO and vehicle speed VSP.
is read out from the correction data map M2 shown in FIG.

In step 55, updated correction data anm' is calculated using the following formula using the 1/4 average correction method.

[0029] anm'= 3/4 anm+ 1/4・Δ
In TVO step 56, the updated correction data anm' is returned to the correction data map M2 as correction data anm.

The above process is repeated until the running conditions for the correction data update process are satisfied.

FIG. 4 is a flowchart showing the main routine of shift pattern switching control performed when the automatic position of the AT mode switch 18 is selected, and each step will be explained below.

In step 60, the throttle opening TVO and vehicle speed VSP are determined from the reference switching determination map M1 shown in FIG.
Reference switching determination data Da corresponding to the reference switching determination data is extracted (corresponding to reference switching determination data extraction means).

In step 61, throttle opening TVO and vehicle speed VSP are determined from the correction data map M2 shown in FIG.
Correction data anm corresponding to the correction data is extracted (corresponding to correction data extraction means).

In step 62, a switching judgment value D is calculated by adding the extracted reference switching judgment data Da and correction data anm (corresponding to switching judgment value calculation means). still,
When the switching judgment value D is expressed as a map, it becomes a switching judgment value map as shown in FIG.

In step 63, it is determined whether the power pattern PP is selected, and in step 64, it is determined whether the accelerator depression speed ΔTVO exceeds the switching judgment value D, and if the economy pattern EP is selected. When ΔTVO>D is satisfied, a command is output to switch from the economy pattern EP to the power pattern PP in which the timing of shifting to a high gear is delayed to the high vehicle speed side (corresponding to shift pattern switching control means).

Therefore, for example, in the case of a driver who performs accelerator work at a high accelerator depression speed, in the correction data update process shown in FIG.
Since VO becomes a large value, anm' = 3/4 anm
The updated correction data anm' obtained by + 1/4 ΔTVO gradually becomes a higher value, and based on the learning result, a value that is suitable for the driver's accelerator work is set as the correction data anm in the correction data map M2. Become. As a result, the switching judgment value D to the power pattern PP becomes a large value, and the accelerator depression speed ΔTVO
When driving on a flat road with a large power output, the economy pattern EP is maintained, and the timing of switching to the power pattern PP that matches the driver's desired intention can be obtained.

For example, in the case of a driver who performs accelerator work at a low accelerator depression speed, in the correction data update process shown in FIG.
Since O becomes a small value, anm'= 3/4anm+
Updated correction data a obtained by 1/4・ΔTVO
nm' gradually becomes a lower value, and a value suitable for the driver's accelerator work is set as the correction data anm in the correction data map M2 based on the learning result. As a result, the judgment value D for switching to the power pattern PP becomes a small value, and even when the accelerator depression speed ΔTVO is not large enough, such as when climbing a hill or overtaking, the economy pattern EP can be easily switched to the power pattern PP. The timing of switching to the power pattern PP that matches the requested intention can be obtained.

In addition, whether the driver performs accelerator work with a high accelerator depression speed or the driver who performs accelerator work with a low accelerator depression speed, the individuality of the driver is absorbed and the power pattern PP
This means that the switching frequency remains constant.

As explained above, in the embodiment, there is provided a shift pattern switching control device for an automatic transmission that automatically switches between two or more set shift patterns based on accelerator work by electronic control. , the correction data anm is created while being updated at any time through learning control based on the monitoring of the driver's accelerator work, and the standard switching judgment data Da of the accelerator depression speed ΔTVO is corrected using this correction data anm to control the switching to the power pattern PP. Even if there are individual differences in accelerator work due to differences in the driver's individuality, it is possible to obtain the timing of switching to the power pattern PP that matches the desired intention of each driver.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and any changes or additions that do not depart from the gist of the present invention are not included in the present invention. It will be done.

For example, in the embodiment, an example of control for switching from an economy pattern to a power pattern is shown, but the control may also be applied when three or more shift patterns are set and switching to a pattern that provides more powerful driving is possible. Can be done.

[0042]

As described above, the present invention provides a shift pattern switching control device for an automatic transmission that automatically switches between two or more set shift patterns based on accelerator work by electronic control. In this method, correction data is created while being updated at any time through learning control based on monitoring of the driver's accelerator work, and standard switching judgment data for accelerator pedal speed is corrected using this correction data to control switching to the power pattern. Therefore, even if there are individual differences in accelerator work due to differences in the driver's personality, it is possible to obtain the effect that the timing of switching to a power pattern that matches the desired intention of each driver can be obtained.

[Brief explanation of drawings]

FIG. 1 is a complaint diagram showing a shift pattern switching control device for an automatic transmission according to an embodiment.

FIG. 2 is an overall system diagram of an automatic transmission to which the shift pattern switching control device of the embodiment is applied.

FIG. 3 is a flowchart showing the flow of correction data update processing performed by the control unit of the embodiment device.

FIG. 4 is a flowchart showing the flow of shift pattern switching control differential performed by the control unit of the embodiment device.

FIG. 5 is a diagram showing a reference switching determination data map in the embodiment device.

FIG. 6 is a diagram showing a correction data map in the example device.

FIG. 7 is a diagram showing switching determination values in the example device as a map.

FIG. 8 is a diagram showing an economy pattern stored and set as a shift pattern in the control unit of the embodiment device.

FIG. 9 is a diagram showing power patterns stored and set as shift patterns in the control unit of the embodiment device.

[Explanation of symbols]

a Shift pattern setting means b Throttle opening detection means c Vehicle speed detection means d Accelerator depression speed detection means e Standard switching judgment data map f Correction data map g Correction data update means h Standard switching judgment data extraction means i Correction data extraction means j Switching judgment value calculation means k Shift pattern switching control means

Claims (1)

[Claims] 1. Shift pattern setting means in which at least two or more shift patterns are set; throttle opening detection means for detecting throttle opening; vehicle speed detection means for detecting vehicle speed; and detection for accelerator depression speed. a standard switching determination data map in which standard switching determination data for accelerator pressing speed is set according to throttle opening and vehicle speed; A correction data map that has been set as a correction data map, a correction data updating means that updates the correction data through learning control while monitoring the accelerator depression speed under predetermined driving conditions, and a throttle opening detection value and vehicle speed from a reference switching determination map. a reference switching judgment data extracting means for extracting reference switching judgment data according to the detected value; a correction data extracting means for extracting correction data according to the throttle opening detection value and the vehicle speed detection value from the correction data map; a switching judgment value calculating means for calculating a switching judgment value by adding together judgment data and correction data; and when the detected accelerator depression speed exceeds the switching judgment value and a normal shift pattern is selected A shift pattern switching control device for an automatic transmission, comprising: shift pattern switching control means for outputting a command to switch to a shift pattern that provides more powerful driving than a normal shift pattern.