KR101843826B1 - Apparatus and method for controlling transmition - Google Patents

Abstract

The present invention discloses an automatic transmission shift control device and method. In the 5-3-2 sequential downshift transmission, the hydraulic duty value of the engagement side element is set to a learning value for 5-3 downshift transmission, which is set based on the behavior of the turbine rotation speed And the hydraulic duty value of the disengagement side element is set on the basis of the behavior of the turbine speed, and the hydraulic duty value of the disengagement side element is set on the basis of the behavior of the turbine speed 5-3-2 By setting the learning value for the sequential downshift shift and executing the 3-2 downshift shifting in the 5-3-2 sequential downshift shifting with the hydraulic duty value of the releasing side element set, So that the shift shock can be prevented and the shift feeling can be fundamentally improved accordingly.

Description

[0001] APPARATUS AND METHOD FOR CONTROLLING TRANSMISSION [0002]

The present invention is embodied to improve the shifting feeling of an automatic transmission. More specifically, the present invention relates to an automatic transmission that is capable of separately setting a learning value applied to hydraulic control of a coupling element and a releasing element during a sequential downshift, To a shift control device and method for a vehicle.

Conventionally, an automatic transmission having a gear train composed of planetary gears is known. In such an automatic transmission, the gear is operated according to a combination of frictional engagement elements that are set to the engaged state between the plurality of frictional engagement elements.

When the automatic transmission is manufactured from a plurality of gears (as the number of operated gears increases), the shift type also changes. The shifting is operated by gears and gears, or the sixth gear is operated by passing through one or more gears and converting to low gear to third gear.

When the shift is operated by the gear and the gear, shifting can be performed by changing one of the plurality of friction engagement elements to be engaged. The engagement element corresponding to the shift request determined according to the acceleration pedal value and the shift pattern for the release element have already been set and stored.

Further, the coupling-side element and the releasing-side element are driven through hydraulic control, and the hydraulic duty pattern of the coupling element and the releasing element is also preset and stored.

At this time, the hydraulic duty value for each element is set based on the learning value executed according to the behavior of the turbine speed.

However, since learning is not performed for the sequential downshift shift when a sequential downshift is requested, the hydraulic duty value for each element is set as a learning value for downshifting despite the sequential downshift, The sequential downshift shifting was performed with the hydraulic duty value.

Namely, even though the 5-3-2 sequential downshift transmission is shifted to the control element including the same engagement side element and the release side element, the shift is performed to the learning value for the single downshift shift, And the hydraulic duty value of the disengagement side element are not accurately controlled, a shift shock to the shift shock often occurs, and the shift feeling is deteriorated.

The present invention has been made to solve the problems inherent in the prior art as described above, and it is an object of the present invention to provide a hydraulic pressure control apparatus and a hydraulic control method thereof, Shifting control of a vehicle by precisely controlling the hydraulic pressure for a coupling element and a releasing element so as to prevent a shift shock and thereby fundamentally improve a shifting feeling.

According to an aspect of the present invention, there is provided a shift control device for a vehicle, This device

A shift control device for a vehicle, comprising a shift control unit that performs a shift control by controlling the hydraulic pressure of an engagement side element and a release side element,

Wherein the shift control unit includes:

A shift information determining unit for determining whether a 5-3-2 sequential downshift shift is requested by an accelerator pedal value, a vehicle speed, and a throttle valve position value of the driver; And

The speed change information determination unit determines the hydraulic duty value of the engagement side element in the 3-3-2 downshift transmission during the 5-3-2 sequential downshift transmission to the learning value for the 5-3 downshift transmission set based on the behavior of the turbine rotation speed And a shift execution section for executing 3-2 downshift shifting during the 5-3-2 sequential downshift shifting with the hydraulic duty value of the engagement side element set and set.

The shift-

Wherein the shift information determining unit sets the learning value for the 5-3-2 sequential downshift shift set on the basis of the behavior of the turbine speed at the time of 3-2 downshifting during 5-3-2 sequential downshift shifting, It is preferable that the hydraulic duty value is set and the hydraulic duty value of the disengagement side element is set to perform the 3-2 downshift shifting during 5-3-2 sequential downshift shifting.

The shift-

If the learning information for the 5-3-2 sequential downshift transmission is not executed in the transmission information determination unit, the hydraulic duty for the coupling-side element is calculated based on the respective learning values for the downshift shifts 5-3 and 3-2, Value and to execute the 5-3-2 sequential downshifting by each learning value for the set 5-3 and 3-2 single shift shifts.

According to another aspect of the present invention, there is provided a shift control method for a vehicle, In this method,

In the shift control unit, receiving the accelerator pedal value, the vehicle speed, and the throttle valve position value of the driver;

Determining whether a 5-3-2 sequential downshift shift request is made based on the acceleration pedal value, the vehicle speed, and the throttle valve position value;

If it is determined that the upshift is a 3-2 downshift in the 5-3-2 sequential downshift transmission and the downshift is 3-2 downshift during 5-3-2 sequential downshift, Judging whether or not it is lost;

Maintaining the hydraulic duty value of the engagement side element as a learning value for the downshift shift of 5-3 when the learning execution is performed for the engagement side element; And

And performing the 3-2 downshift shifting during the 5-3-2 sequential downshift shifting with the hydraulic duty value of the retained coupling-side element.

And,

Determining whether learning execution has been performed with respect to the disengagement side element during a downshift shift of 3-2 in the 5-3-2 sequential downshifting;

Setting the hydraulic duty value of the disengagement side element to a learning value for the 5-3-2 sequential downshift shift when learning is performed on the disengagement side element; And

And performing a 3-2 downshift shift during 5-3-2 sequential downshift shifting with the hydraulic duty value of the release side element.

The method comprises:

When the learning execution is not performed for the 5-3-2 sequential downshift shift, the learning value for 3-2 independent downshift is changed to 5-3-2 sequential downshift. It is preferable to be provided to execute the program.

As described above, according to the present invention, in the 5-3-2 sequential downshift shifting, the hydraulic duty value of the engagement side element during the 3-2 downshift shifting is set to 5-3 downshift speed And the hydraulic duty value of the disengagement side element is set to a value obtained by subtracting the hydraulic duty value of the turbine rotation number from the turbine rotation speed 5-3-2 Sequential Downshift Set as a learning value for the shift set on the basis of the behavior and set as the hydraulic duty value of the release side element set, The hydraulic pressure control for the coupling element and the releasing element is accurately executed to prevent the shift shock and thus the shift feeling can be fundamentally improved.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
1 is a diagram showing a configuration of a shift control device of an automatic transmission according to the present invention.
2 is a flowchart illustrating a shift control process of an engagement side element of an automatic transmission according to another embodiment of the present invention.
3 is a flowchart illustrating a shift control process of a release side element of an automatic transmission according to another embodiment of the present invention.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

1 is a diagram showing the configuration of a shift control device of an automatic transmission according to the present invention. As shown in the figure, the transmission control device of the automatic transmission according to the present invention is characterized in that the hydraulic duty value of the engagement side element is shifted by 5-3 downshifting during the downshift shift of 3-2 in the 5-3-2 sequential downshift transmission And performs the 3-2 downshift shifting with the hydraulic duty value of the retained coupling-side element. This apparatus is provided as the shift-information determining unit 11 and the shift-performing unit 13 .

Here, the shifting information determiner 11 is provided to determine whether 5-3-2 sequential downshift shifting is requested by the accelerator pedal value, the vehicle speed, and the throttle valve position value of the driver.

In the case of the 5-3-2 sequential downshift shift request, the shift executing section 13 determines whether the shift-up shift determining section 11 determines that the 3-3-2 downshift shift is performed in the 5-3-2 sequential downshift shift When the learning is performed on the 5-3-2 sequential downshift transmission and the 5-3-2 sequential downshift transmission is executed, the hydraulic duty value of the engagement side element is reduced to 5-3 down Shift-shift, and performs the 3-2 downshift shifting to the hydraulic duty value of the retained coupling-side element.

Wherein the learning value is a hydraulic duty value of a release-side element or engagement-side element that has corrected the hydraulic pressure for each of the predetermined release side element or engagement side element based on the behavior of the turbine rpm, Sets the hydraulic duty value of the side element.

In the 5-3-2 sequential downshift transmission pattern, the control element including the engagement-side element and the disengagement-side element and the 3-D downshift transmission-demand control element are the same in the 5-3 downshift transmission, The learning value for the 3-down shift and the learning value for the 3-2 down-shift can be applied equally. However, the storage of learning values for this 5-3-2 sequential downshift transmission is prohibited.

On the other hand, the speed change execution unit 13 sets the learning value set in accordance with the behavior of the turbine speed to the hydraulic duty value of the disengagement side element and performs the downshift shift of 3-2 to the hydraulic duty value of the disengagement side element do.

In other words, when the learning for the 5-3-2 sequential downshift shifting is performed and the learning for the 5-3-2 sequential downshift shift is executed, the speed change execution unit 13 performs the 5-3-2 sequential downshift shifting The hydraulic duty value of the release side element is set as the learning value for the 3-3-2 sequential downshift speed change, and the 3-2 downshift speed change is executed.

On the other hand, when the learning for the 5-3-2 sequential downshift shift is not executed, the shift execution unit 13 shifts to the respective learning values for the downshift shifts in the single-shift state 5-3 and the downshift shift in the single- .

With this arrangement, the hydraulic duty value of the engagement side element is maintained at the learning value for the downshift shift of 5-3 during the downshift shift of 3-2 in the 5-3-2 sequential downshift transmission, The hydraulic duty value of the disengagement side element is set as a learning value for the 5-3-2 sequential downshift speed change and the hydraulic duty value of the disengagement side element is set to 5-3 -2 Sequential downshift Shift 3-2 downshift during shift.

Therefore, when the 5-3-2 sequential downshift transmission is requested, the hydraulic pressure is controlled accurately for the engagement-side element and the release-side element, thereby preventing the shift shock and fundamentally improving the shift feeling.

In the embodiment of the present invention, the 5-3-2 sequential downshift transmission is described as an example. However, since the control elements of the 5-4-2-sequential downshift transmission and the 5-3-2 sequential downshift transmission are all the same, The same applies to the -4-2 sequential downshift.

Fig. 2 is a flowchart showing the shift control process of the engagement side element of the automatic transmission by the shift control unit shown in Fig. 1. Fig. The shift control process of the automatic transmission will be described with reference to the drawings.

The shift control unit receives the accelerator pedal value, the vehicle speed, and the throttle valve position value of the driver through step 101, and then, based on the received vehicle speed, the accelerator pedal value, and the throttle valve position value received through step 103 5-3-2 Determine whether or not a sequential downshift shift request is made.

In step 103, if the 5-3-2 sequential downshift shift is requested, the shift control unit determines whether the shift control is a 3-2 downshift shift during the 5-3-2 sequential downshift shift through step 104 , And if it is determined to be a 3-2 downshift shift during 5-3-2 sequential downshift shifting, the process proceeds to step 105.

In step 105, it is determined whether learning has been performed for the 5-3-2 sequential downshift shift. If the learning has been executed, the shift control unit determines in step 107 whether or not the hydraulic pressure The duty value is held at the learning value of the downshift shift of 5-3.

At this time, the shift control unit inhibits the learning of the downshift shifts 5-3 and 3-2 through step 109. [ Then, a 3-2 downshift shift during 5-3-2 sequential downshift shifting is executed as a learning value for the 5-3 downshift shift (step 111).

In step 105, if the learning for the sequential downshift is not performed, the learning values for the individual downshift shifts 5-3 and 3-3 are set to 5-3-2 sequential downshifts, respectively. 2 downshift.

3 is a flowchart showing a shift control process for the release side element of the shift control unit shown in Fig. The shift control process of the automatic transmission will be described with reference to FIG.

If the shift control unit determines in step 301 that the vehicle speed, the accelerator pedal value, and the throttle valve position value are in the 5-3-2 sequential downshift shift request, Shifting state (step 303).

In step 303, in the case of the 3-2 downshift shift during the 5-3-2 sequential downshift, the shift control unit determines whether the learning element has been executed for the releasing element through step 305. [

Here, if learning has been performed on the releasing-side element, the shift control unit sets the hydraulic duty value of the releasing-side element as a learning value for the 5-3-2 sequential downshift shift through step 307, Down shift shift during the 5-3-2 sequential downshift shifting via the shift lever 309.

On the other hand, when the learning execution for the 5-3-2 is not executed in the step (305), the learning value for the 3-2 so-called downshift shift is inputted through the step 311 of the shift control unit to the releasing side element And then proceeds to step 309. In step 309,

According to the embodiment of the present invention, the hydraulic duty value of the engagement side element during the 3-2 downshift transmission during the 5-3-2 sequential downshift transmission is set to a learning value for the 5-3 downshift transmission, which is set based on the behavior of the turbine rotation speed Side down-shifting operation in the 5-3-2 sequential downshift shifting with the hydraulic duty value of the retained coupling-side element, and the hydraulic duty value of the releasing-side element is calculated based on the behavior of the turbine rpm By setting the learning value for the set 5-3-2 sequential downshift shift and performing the 3-2 downshift shifting during 5-3-2 sequential downshift shifting to the hydraulic duty value of the releasing side element set, It is possible to precisely execute the hydraulic pressure control for the element, thereby preventing the shift shock and fundamentally improving the shift feeling accordingly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

5-3-2 Sequential Downshift During 3-2 downshift transmission in shift down shift, the hydraulic duty value of the engagement side element is maintained at a learning value for 5-3 downshift speed change based on the behavior of the turbine speed, The hydraulic duty value of the disengagement side element is set to 5-3-2, which is set on the basis of the behavior of the turbine speed, The hydraulic pressure control for the engaging element and the releasing element is performed by setting the learning value for the sequential downshift transmission and performing the 3-2 downshift shifting in the 5-3-2 sequential downshift shifting with the hydraulic duty value of the releasing element set The accuracy and reliability of the operation and reliability of the shift control apparatus and method of the automatic transmission that can precisely execute the shifting shock to thereby prevent the shift shock and thereby enhance the shifting feeling fundamentally, Because the extent and to obtain a great advance, as well as there is sufficient potential for commercial or marketing of the vehicle is applied to apparently conducted in reality the invention there is industrial applicability.

Claims (6)

A shift control device for a vehicle, comprising a shift control unit that performs a shift control by controlling the hydraulic pressure of an engagement side element and a release side element,
Wherein the shift control unit includes:
A shift information determining unit for determining whether a 5-3-2 sequential downshift shift is requested by an accelerator pedal value, a vehicle speed, and a throttle valve position value of the driver; And
The speed change information determination unit determines the hydraulic duty value of the engagement side element in the 3-3-2 downshift transmission during the 5-3-2 sequential downshift transmission to the learning value for the 5-3 downshift transmission set based on the behavior of the turbine rotation speed And a shift execution section for executing the 3-2 downshift shift during 5-3-2 sequential downshift shifting by the hydraulic duty value of the engagement side element set and set. The transmission control device according to claim 1,
Wherein the shift information determining unit sets the learning value for the 5-3-2 sequential downshift shift set on the basis of the behavior of the turbine speed at the time of 3-2 downshifting during 5-3-2 sequential downshift shifting, Wherein the hydraulic duty value is set and the hydraulic duty value of the releasing side element is set so as to perform the 3-2 downshift shifting during 5-3-2 sequential downshift shifting. The transmission system according to claim 2,
If the learning information for the 5-3-2 sequential downshift transmission is not executed in the transmission information determination unit, the hydraulic duty for the coupling-side element is calculated based on the respective learning values for the downshift shifts 5-3 and 3-2, And to execute the 5-3-2 sequential downshift shifting with each learned value for the set 5-3 and 3-2 single shift shifts. In the shift control unit, receiving the accelerator pedal value, the vehicle speed, and the throttle valve position value of the driver;
Determining whether a 5-3-2 sequential downshift shift request is made based on the accelerator pedal value, the vehicle speed, and the throttle valve position value;
If it is determined that the upshift is a 3-2 downshift in the 5-3-2 sequential downshift transmission and the downshift is 3-2 downshift during 5-3-2 sequential downshift, Judging whether or not it is lost;
Maintaining the hydraulic duty value of the engagement side element as a learning value for the downshift shift of 5-3 when the learning execution is performed for the engagement side element; And
And performing a 3-2 downshift shifting of the 5-3-2 sequential downshift shifting by the hydraulic duty value of the held engagement side element. 5. The method of claim 4,
Determining whether learning execution has been performed with respect to the disengagement side element during a downshift shift of 3-2 in the 5-3-2 sequential downshifting;
Setting the hydraulic duty value of the disengagement side element to a learning value for the 5-3-2 sequential downshift shift when learning is performed on the disengagement side element; And
Further comprising the step of: performing a 3-2 downshift shift during 5-3-2 sequential downshift shifting with the hydraulic duty value of the release side element. 6. The method of claim 5,
When the learning execution is not performed for the 5-3-2 sequential downshift shift, the learning value for 3-2 independent downshift is changed to 5-3-2 sequential downshift. Wherein the automatic transmission is configured to execute the automatic transmission.

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