JPH05118425A - Speed change controller for automatic transmission - Google Patents

Abstract

PURPOSE:To permit the traveling conforming to the driver's intention without generating time lag between the acceleration operation by a driver and the actual start of acceleration by shortening the speed change time when the driver demands the sharp acceleration. CONSTITUTION:A speed change controller is equipped with a pressure adjusting means (b) for adjusting the oil pressure supplied into an automatic transmission (a) which carries out speed change operation by the hydraulic pressure, throttle opening degree detecting means (c) for detecting the throttle opening degree, and a speed change control means (e) which carries out the optimum speed change of the automatic transmission (a) by controlling the operation of the pressure adjusting means (b) on the basis of the input supplied fdom detecting means (d) including the throttle opening degree detecting means (c). The speed change control means (c) is equipped with a speed detection part (f) for detecting the throttle stepping ON speed on the basis of the input supplied from the throttle opening degree detecting means (c) and an oil pressure correction part (g) which judges if the throttle stepping ON speed is over a prescribed value or not, and outputs a control signal for increasing the oil pressure supplied into the automatic transmission (a) into the pressure adjusting means (b) when the throttle stepping ON speed is over a prescribed value.

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 performing shift control according to a throttle opening in an automatic transmission.

[0002]

2. Description of the Related Art Conventionally, for example, the one disclosed in Japanese Unexamined Patent Publication No. 58-65353 is known as one in which shift control is performed by the throttle opening of an automatic transmission.

The device described in the above publication detects and compares the throttle opening at a constant interval by its sensor output,
The shift pattern in which the basic shift pattern is corrected based on the changing speed can be selected.

[0004]

However, in the above-mentioned conventional automatic transmission, the basic shift pattern is moved in parallel in the vehicle speed increasing direction in accordance with the changing speed of the throttle opening, and the low speed range is simply generated. Since it only increases (see Fig. 6), the driver needs to accelerate suddenly, and even if he depresses the throttle early, it was not possible to shorten the shift time. Therefore, there is a time lag between the driver's acceleration operation and the actual end of the gear shift and the start of acceleration. In a vehicle equipped with an automatic transmission (hereinafter simply referred to as an A / T vehicle), There was a problem that it was difficult to drive reflecting the driver's will.

The present invention has been made in view of the above-mentioned problems, and in an A / T vehicle, when the driver needs a rapid acceleration, the shift time is shortened to actually perform the acceleration operation of the driver. It is an object of the present invention to provide a shift control device for an automatic transmission that allows a vehicle to reflect the driver's will without causing a time lag before acceleration is started.

[0006]

According to the present invention, the driver's intention of sudden acceleration is determined by the stepping speed of the throttle. If the throttle stepping speed is higher than a predetermined value, the hydraulic pressure supplied to the automatic transmission is increased to shorten the shift time. It was decided to achieve the above object.

That is, according to the invention described in claim 1, FIG.
As shown in the corresponding claim diagram, the pressure adjusting means b for adjusting the hydraulic pressure to be supplied to the automatic transmission a which performs the shift operation by hydraulic pressure.
And the throttle opening detecting means c for detecting the throttle opening, and the operation of the pressure adjusting means b on the basis of inputs from the detecting means d including the throttle opening detecting means c to control the automatic transmission. The gear shift control means e for performing the optimum gear shift of a is provided with the gear shift control means e, which detects the throttle pedal depression speed based on the input from the throttle opening detection means c, and the throttle pedal depression speed is a predetermined value. A hydraulic pressure correction unit g is provided which determines whether or not the above is true, and outputs a control signal for increasing the hydraulic pressure supplied to the automatic transmission a to the pressure adjusting means b when the throttle depression speed is equal to or higher than a predetermined value.

Further, in the apparatus according to the second aspect, the hydraulic pressure correction unit g stores the relationship between the throttle depression speed and the supply hydraulic pressure as a map, and when the throttle depression speed is equal to or higher than a predetermined value, the throttle depression speed is increased. A correction was made to increase the supplied hydraulic pressure to a pressure corresponding to.

[0009]

The operation of the present invention will be described with reference to FIG.

When the driver suddenly depresses the throttle in order to perform rapid acceleration, the throttle depressing speed becomes faster. Therefore, in the speed change control means e, the speed detecting section f obtains the throttle stepping speed from the throttle opening degree obtained from the throttle opening degree detecting means c, and the hydraulic pressure correcting section g further obtains the throttle stepping speed obtained from this speed detecting section f. It is determined whether or not the speed is equal to or higher than a predetermined value, and when the speed is equal to or higher than the predetermined value, it is determined that the driver has the intention of sudden acceleration, and a control signal for increasing the hydraulic pressure supplied to the automatic transmission a is output to the pressure adjusting means b. To do.

Therefore, in the automatic transmission a, the shift operation speed of the clutch and the like is increased, and the shift time is shortened. Therefore, the time from when the driver performs the acceleration operation to when the shift is completed and the actual acceleration is started is shortened, and the time lag between them can be eliminated.

According to the second aspect of the present invention, when the throttle depression speed is equal to or higher than a predetermined value, the pressure corresponding to the throttle depression speed is supplied based on the stored map showing the relationship between the throttle depression speed and the supplied oil pressure. The hydraulic pressure is increased, that is, the shift time changes according to the throttle depression speed. Therefore, the faster the throttle depression speed, the shorter the shift time.

[0013]

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

First, the configuration of the embodiment will be described.

FIG. 2 is a schematic view showing a shift control device for an automatic transmission according to an embodiment of the present invention, FIG. 3 is a structural explanatory view showing a structure of an automatic transmission to which the device according to the present embodiment is applied, and FIG. 4 is a throttle opening. 5 is a control flowchart of the shift control device for the automatic transmission according to the embodiment of the present invention.

The shift control apparatus for an automatic transmission according to the embodiment has an A / T control unit 1 as shown in FIG. The A / T control unit 1 receives signals from the brake switch 3, the select switch 5, the vehicle speed sensor 6, and the oil temperature sensor 7, and the ECCS control unit 20 for controlling the drive of the engine E. A throttle sensor 2, which is a sensor related to the throttle of the engine E 2, an idle switch 12,
The signal from the full throttle switch 13 is input.
Further, on the output side of the A / T control unit 1, a line pressure solenoid 4, a lockup solenoid 8, shift solenoids 9 and 10, a timing solenoid 11 as pressure adjusting means for adjusting the hydraulic pressure supplied to the automatic transmission. Is provided. The select switch 5 is
1 range switch, 2 range switch, D range switch, P / N range switch, and R range switch are provided. 21 is a control valve.

The throttle sensor 2 detects the throttle opening and constitutes the throttle opening detecting means of the present invention. The signal detected at each throttle opening is input to the A / T control unit 1. To be done.

The A / T control unit 1 controls the shift point of the automatic transmission AT and constitutes a shift control means in the claims. By the way, FIG. 3 shows the structure of an automatic transmission AT to which the embodiment apparatus is applied, in which 31 is a torque converter, 32 is an oil pump, and 3 is an oil pump.
3 is an input shaft, 34 is a band brake, 35
Is a reverse clutch, 36 is a high clutch, 37 is a front sun gear, 38 is a front pinion gear, 39 is a front internal gear, 40 is a front planet gear, 41 is a rear sun gear, 42 is a rear pinion gear, 4
3 is a rear internal gear, 44 is a rear planet gear, 45 is a forward clutch, 46 is a forward one-way clutch, 47 is an overrun clutch, 48 is a low one-way clutch, 49 is a low & reverse brake, 50 is a parking ball, 51 is parking. gear,
52 is an output shaft.

Based on this configuration, each clutch 35, 3
6, 45, 46, 47, 48 and brakes 34, 4
9 is operated to shift the automatic transmission AT. by the way,
The shift time during acceleration of the automatic transmission AT can be changed by changing the engaging force of the high clutch 36, the forward clutch 45, the forward one-way clutch 46, and the low one-way clutch 48. The engaging force of the clutches 36, 45, 46, 48 can be controlled by controlling the line pressure supplied from the control valve 21, and the line pressure solenoid controls the line pressure. It is 4.

In this embodiment, the shift time at the time of acceleration is controlled as necessary. The control of the shift time in the A / T control unit 1 will be described.

The A / T control unit 1 obtains the throttle depression speed dTH / dt (see FIG. 4) based on the throttle opening signal from the throttle sensor 2, and when the depression speed dTH / dt reaches a predetermined value or more. It has a function of outputting a control signal for increasing the line pressure in order to increase the engagement force of the clutches 36, 45, 46, 48 of the automatic transmission AT. In the A / T control unit 1, a dedicated map 22 defining the relationship between the throttle depression speed dTH / dt and the optimum line pressure corresponding thereto is stored in the memory. By the way, this dedicated map 22
Indicates that the line pressure becomes higher as the throttle depression speed dTH / dt becomes faster.

Next, the operation will be described.

The control operation of the A / T control unit 1 of the embodiment will be described below with reference to the flow chart shown in FIG.

When the ignition switch is closed, A
The / T control unit 1 starts executing the program in step 200, and proceeds to step 201.

Step 201 is a step for detecting the throttle depression speed based on the change in the throttle opening obtained from the throttle sensor 2. After this processing, the routine proceeds to step 202.

Step 202 is a step of judging whether or not the detected throttle depression speed is equal to or higher than a predetermined value.
If "NO", the routine proceeds to step 203, where a command for normal shift hydraulic pressure is output, and if "YES", the routine proceeds to step 204. The predetermined value to be compared with the throttle depression speed corresponds to the throttle depression speed at the time of sudden acceleration, and this value is obtained by an experiment.

In step 204, since the line pressure is increased more than in the case of the normal shift control, a step of selecting the optimum increased oil pressure from the dedicated map 22 stored in the A / T control unit 1 and outputting the pressure increase command. After this processing, the routine proceeds to step 205.

In step 205, the line pressure solenoid 4 is driven in the line pressure increasing direction based on the process of step 204, and the line pressure is controlled to a predetermined value. (Step 206).

Therefore, when the throttle depression speed is higher than the predetermined value, the determination in step 202 is "YES".
And the line pressure is increased, and as a result, each clutch 3
The time required to fasten 6,45,46,48 becomes shorter,
Gear shifting time is shortened. Therefore, the time from the sudden depression of the throttle to the start of the sudden acceleration is shortened, and the time lag between them is eliminated.

As described above, in the shift control device for the automatic transmission according to the embodiment, when the driver needs to perform the rapid acceleration, the line pressure is increased, and the throttle pedal is depressed and the acceleration is started. Since there is no time lag, it is possible to obtain an effect that the driver's will can be reflected in driving.

Particularly, the increase amount of the line pressure is set by using the dedicated map 22 showing the relationship between the throttle depression speed built in the A / T control unit 1 and the optimum increased oil pressure corresponding thereto. However, the quicker the pedaling operation is, the shorter the time required for shifting is, which accurately reflects the driver's will.

Although the embodiments have been described above with reference to the drawings, the specific configuration is not limited to the embodiments, and modifications and additions within the scope of the present invention are included in the present invention. Be done. For example, in the embodiment, the throttle sensor 2 is used as the throttle opening detection means,
Although the throttle stepping speed is obtained, a sensor for detecting the stepping speed may be provided in the access pedal. Further, in the embodiment, in response to the invention described in claim 2, the line pressure is increased according to the depression speed when the throttle depression speed is equal to or higher than a predetermined value. However, when the throttle depression speed is equal to or higher than the predetermined value. , Even if it is controlled to a predetermined supply oil pressure higher than the normal supply oil pressure, the time lag from the acceleration operation to the actual start of acceleration is shortened,
It is possible to obtain the action and effect of enabling the shift control that reflects the driver's will.

[0033]

As described above, in the shift control device for an automatic transmission according to the present invention, the shift control means determines whether or not the throttle depression speed is equal to or higher than a predetermined value,
When the throttle pedal speed is higher than a specified value, a hydraulic pressure correction unit that outputs a control signal to increase the hydraulic pressure supplied to the automatic transmission is provided to the pressure adjusting means. The hydraulic pressure supplied to the machine is increased, the shift time is shortened, the time lag from the acceleration operation to the start of acceleration is shortened, and the driver's will can be reflected in the effect.

According to the second aspect of the present invention, the supply hydraulic pressure corresponding to the throttle depression speed is set based on the stored map showing the relationship between the throttle depression speed and the supply hydraulic pressure. The faster the lever speed is, the stronger the will to accelerate is, so that it is possible to increase the hydraulic pressure supplied and shorten the shift time, and it is possible to obtain the effect that the vehicle can further reflect the driver's will.

[Brief description of drawings]

FIG. 1 is a claim correspondence diagram showing a shift control device for an automatic transmission according to the first and second aspects of the invention.

FIG. 2 is a schematic diagram showing a shift control device for an automatic transmission according to an embodiment of the present invention.

FIG. 3 is a structural explanatory view showing a structure of an automatic transmission to which the apparatus of the embodiment is applied.

FIG. 4 is a time chart showing the relationship between throttle opening and time.

FIG. 5 is a flowchart showing the control operation of the A / T control unit of the embodiment apparatus.

FIG. 6 is an explanatory diagram showing a change of a shift pattern of a conventional automatic transmission.

[Explanation of symbols]

 a automatic transmission b pressure adjusting means c throttle opening detecting means d detecting means e speed change controlling means f speed detecting section g hydraulic pressure correcting section

Claims (2)

[Claims] 1. A pressure adjusting means for adjusting a hydraulic pressure supplied to an automatic transmission that performs a shift operation by hydraulic pressure, a throttle opening detecting means for detecting an opening of a throttle, and a detecting means including the throttle opening detecting means. A shift control means for controlling the operation of the pressure adjusting means on the basis of an input from the throttle control means to perform an optimal shift of the automatic transmission, and the shift control means is provided with a throttle pedal based on an input from the throttle opening detection means. A speed detector that determines the speed,
It is determined whether or not the throttle depression speed is equal to or higher than a predetermined value, and when the throttle depression speed is equal to or higher than the predetermined value, a hydraulic pressure correction unit that outputs a control signal for increasing the hydraulic pressure supplied to the automatic transmission to the pressure adjusting means. A shift control device for an automatic transmission characterized by being provided. 2. The hydraulic pressure correction unit stores the relationship between the throttle depression speed and the supplied hydraulic pressure as a map, and when the throttle depression speed is equal to or higher than a predetermined value, increases the supplied hydraulic pressure to a pressure corresponding to the throttle depression speed. The shift control device for an automatic transmission according to claim 1, wherein correction is performed.