KR20140048006A - Method and apparatus for learning torque capaity of clutch of vehicle - Google Patents

Abstract

Disclosed are a method and an apparatus for learning torque capacity of a clutch of a vehicle. The method for learning torque capacity of the clutch of the vehicle according to an embodiment of the present invention comprises the steps: deriving a ratio between clutch pressure and clutch input torque as torque capacity, in case that a vehicle movement is stabilized, when a slip accumulation value on the slip amount received on a predetermined cycle during micro-slip control of the clutch is equal to or more than a previously set determination standard value and an integral value of the calculated slip accumulation values is equal to or more than the threshold value; learning the derived torque capacity and updating and storing a learned value of the torque capacity; and correcting the stored torque capacity learning value into a correction torque to which an oil-temperature change is reflected and providing the corrected value for hydraulic control of the clutch so as to correctly derive torque capacity by actively learning the torque capacity relative to errors in input torque and oil temperature, thereby preventing deterioration in riding comfort and shift quality due to excessive slip of the clutch during traveling which is caused by an incorrect control of torque capacity to which a repulsive force of a return spring, deterioration of the clutch and changes in characteristics of a piston are reflected. [Reference numerals] (301) Derive torque capacity; (303) Receive input torque at a predetermined point of time in a predetermined cycle; (305) Derive an error of input torque; (307) Torque capacity learning value = Torque capacity before a predetermined point of time + Input torque error - 1 (Acceleration signal change amount) exp; (309) Derive a smaller value between the torque capacity learning value and the minimum torque and a larger value between the torque capacity learning value and the maximum torque as torque capacity; (311) Maximum torque < Torque capacity < Minimum torque ?; (313) Update and store the torque capacity as a torque capacity learning value; (315) Correct the updated torque capacity learning value as correction torque on oil pressure change; (317) Set torque capacity as an initial value; (AA) Start; (BB) End

Description

Method and device for learning torque capacity of vehicle clutch {METHOD AND APPARATUS FOR LEARNING TORQUE CAPAITY OF CLUTCH OF VEHICLE}

The present invention relates to a torque capacity learning method and apparatus for a vehicle clutch, and more particularly, calculates a transmission torque capacity that varies depending on the characteristics of a deteriorating return spring or a piston of a clutch, and executes learning on the calculated torque capacity. A method and apparatus are provided for enabling updating of learning values for torque capacity.

The hybrid vehicle means to drive the vehicle by efficiently combining two or more kinds of power sources. In most cases, the hybrid vehicle is driven by an engine that obtains the rotational force by burning fuel (fossil fuel such as gasoline) and an electric motor Means a vehicle driven by a vehicle.

This hybrid vehicle is a futuristic vehicle that can reduce exhaust gas and improve fuel efficiency by adopting not only engine but also electric motor as auxiliary power source, and it is more active in response to the demand of the times to improve fuel efficiency and develop environmentally friendly products. Is going on.

Generally, a hybrid vehicle can reduce exhaust gas and improve fuel economy by using a motor as a power source as well as an engine. In such a hybrid vehicle, the engine, the driving motor, and the transmission may be arranged in a line.

Such a hybrid vehicle may be equipped with a clutch for transmitting and blocking driving force between the engine and the driving motor. In addition, the engine 11 may be equipped with an ISG (Integrated Startor & Generator) that operates the engine or serves as a generator.

The hybrid vehicle may drive in an electric vehicle (EV) mode, which is a pure electric vehicle mode using only the power of the driving motor. The hybrid vehicle may be configured to operate as the main power of the engine (motor). The hybrid vehicle may be driven in a hybrid electric vehicle (HEV) mode using rotational power as an auxiliary power, and the hybrid vehicle may recover the braking and inertia energy of the vehicle by generating power from the motor to generate a battery when the vehicle is driven by braking or inertia. You can drive in Regenerative Braking (RB) mode.

As described above, the hybrid vehicle operates the clutch for power transfer and separation between the drive motor and the engine for mode conversion and the like. The operating hydraulic pressure of the clutch, which determines the operation of the clutch, can greatly influence the driving performance and the power performance of the hybrid vehicle, so it must be accurately controlled.

For precise control of the operating hydraulic pressure of the clutch, the logic for accurately calculating the torque capacity, which is the clutch transmission torque, is a very important algorithm.

This torque capacity is derived from the clutch transmission torque calculation formula set based on the clutch hydraulic pressure transmission torque map or the pressure coefficient friction coefficient map, and the like, and this clutch transmission torque calculation equation is already well known.

However, the torque capacity derived based on the clutch transmission torque calculation formula has a problem that it is difficult to derive the exact torque capacity when the clutch deterioration, the rebound pressure of the return spring, or the characteristics of the piston are changed.

Accordingly, the present invention was created to solve the above problems, and an object of the present invention is to determine that the vehicle behavior is stable based on the change amount of the acceleration signal and the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque. If the slip accumulation value for the slip amount received at a predetermined period during the fine slip control of the clutch is greater than or equal to the predetermined threshold value, the clutch pressure and the clutch input torque ratio are derived as the torque capacity when the integral value of the calculated slip accumulation value is greater than or equal to the threshold value. And by performing the learning on the derived torque capacity to update the learning value for the torque capacity, the vehicle clutch torque capacity that can derive the accurate torque capacity by actively learning the torque capacity against the error of the input torque. It is to provide a learning method and apparatus.

Clutch torque capacity learning apparatus for a vehicle according to an embodiment of the present invention for achieving the above object,

A clutch for transmitting power of the vehicle to the transmission;

When it is determined that the vehicle behavior is stabilized based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque, the slip accumulation value for the slip amount received at a predetermined period during the micro slip control of the clutch is determined. A clutch torque capacity deriving unit for deriving the clutch torque capacity at a time point that is equal to or greater than a predetermined determination reference value and the integrated value of the calculated slip accumulation value is equal to or greater than a predetermined threshold value;

A clutch torque capacity learning unit for learning about the derived clutch torque capacity and updating a learning value for torque capacity with respect to an error in the input torque and an amount of change in the acceleration signal received at a predetermined point in a predetermined period; And

And a clutch hydraulic driving unit configured to execute hydraulic control and transmit the hydraulic control signal according to the hydraulic control signal set based on the clutch torque capacity learning value.

Clutch torque capacity learning method for a vehicle according to another embodiment of the present invention,

A vehicle behavior determination process of determining that the vehicle behavior is stable based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque;

When the vehicle behavior is stable, the clutch input torque and the clutch input received when the slip accumulation value for the slip amount received at a predetermined period during the micro slip control of the clutch is greater than or equal to a preset determination threshold and the integral value of the calculated slip accumulation value is greater than or equal to the threshold value. Torque capacity deriving process for deriving torque capacity based on pressure; And

The torque capacity derivation process is applied to the variation of the input torque error and the acceleration signal by receiving the torque capacity derived before the predetermined time point of the predetermined period, the clutch input torque input at the predetermined time point of the predetermined period, and the preset maximum torque and the lowest torque. It is characterized in that it comprises a torque capacity learning process for executing the learning about the torque capacity derived from and updating and storing the torque capacity learning value.

Preferably the torque capacity learning process,

An input torque difference calculating step of receiving an input torque received at a predetermined point in a predetermined period and calculating an input torque difference;

A torque capacity learning value deriving step of deriving a current torque capacity learning value from a preset proportional relationship by receiving the input torque difference and a change in torque capacity and an acceleration signal before a predetermined time point of the predetermined period;

A torque capacity deriving step of deriving a torque capacity having a smaller value among the current torque capacity learning value and a preset maximum torque and a torque capacity having a larger value among the preset minimum torques; And

And a torque capacity updating step of storing the derived torque capacity after updating the derived torque capacity to a torque capacity learning value when the derived torque capacity exists within the range of the highest torque and the lowest torque.

Preferably the torque capacity updating step,

It is characterized in that it is provided to correct the stored torque capacity learning value to the preset correction torque in accordance with the oil temperature change and generate a hydraulic control signal based on the corrected torque capacity learning value to transmit the generated hydraulic control signal to the clutch hydraulic controller.

As described above, the vehicle clutch torque capacity learning method and apparatus according to the embodiment of the present invention, the vehicle behavior is stable based on the change amount of the acceleration signal and the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque. If it is determined that the slip accumulation value for the slip amount received at a predetermined period during the micro-slip control of the clutch is greater than or equal to a preset determination threshold value, the clutch input pressure and clutch input torque ratio are torqued when the integral value of the calculated slip accumulation value is equal to or greater than the threshold value. By deriving the capacity, and learning the torque capacity derived from the input torque error and the acceleration signal variation, and updating the learning value for the torque capacity, it is possible to actively learn the torque capacity for the error of the input torque. Accurate torque capacity can be derived for the return spring rebound pressure, Reochi becomes deteriorated, and can change the characteristics of the piston is essentially removed by the reflected torque capacity of the driving comfort and decrease degradation due to byeonsokgam excessive slip of driving due to an incorrect control of the clutch occurs.

Further, by correcting the clutch torque capacity learning value with the correction torque reflected in the oil temperature fluctuation, it is possible to derive the correct torque capacity by actively learning the torque capacity against the oil temperature fluctuation so that the return spring rebound pressure, clutch degradation, and It is possible to fundamentally eliminate the deterioration of the ride comfort and the deterioration of the shift due to the excessive slip of the clutch during driving caused by the inaccurate control of the torque capacity reflecting the change in the characteristic of the piston.

The following drawings, which are attached in this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.
1 is a view showing the configuration of the clutch torque capacity learning apparatus of a hybrid vehicle according to an embodiment of the present invention.
2 is a flowchart illustrating a clutch torque capacity learning process of a hybrid vehicle according to another exemplary 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.

Before describing the present invention, an embodiment of the present invention has been described as an example of a clutch in which a hybrid vehicle is applied, but the clutch is applied to all vehicles equipped with a clutch such as a vehicle equipped with a continuously variable transmission and a vehicle equipped with a dual clutch. It will be obvious.

1 is a view showing the configuration of the clutch torque capacity learning apparatus of a hybrid vehicle according to an embodiment of the present invention. Referring to FIG. 1, the clutch torque capacity learning apparatus of a hybrid vehicle according to an exemplary embodiment of the present disclosure may include a slip amount accumulation value, an integral value with respect to the slip accumulation value, derived through micro slip control of clutch hydraulic pressure when the vehicle behavior is stabilized. Deriving the torque capacity based on the clutch input torque and the clutch pressure, and to perform the learning of the torque capacity derived for the error of the input torque and to update the torque capacity learning value, such a device, the clutch 110, clutch torque capacity derivation The unit 130, the torque capacity learning unit 150, and the clutch hydraulic control unit 170 are included.

The clutch 110 is directly connected to transmit engine and / or motor power to a transmission (not shown).

When the clutch torque capacity deriving unit 130 determines that the vehicle behavior is stabilized based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque, the clutch deterioration and the return spring are determined. And the clutch slip and the clutch input torque ratio received when the slip slip is performed at the time when the slip accumulation value is equal to or greater than a predetermined threshold and the integral value of the calculated slip accumulation value is equal to or greater than the threshold value. To the clutch torque capacity.

Therefore, the derived torque capacity is derived by reflecting the clutch degradation, the return spring rebound pressure and the characteristic variation of the piston.

At this time, the return spring rebound pressure is the repulsion force of the return spring, which is the operating mechanism in the clutch, and the clutch surface contact does not occur when the hydraulic pressure is not applied to the rebound pressure of the return spring. However, if the elastic force of the return spring fluctuates over time, the characteristics of the return spring fluctuate.

In addition, the piston is also an operating mechanism in the clutch, the durability of the piston is deteriorated over time, the characteristics of the piston is changed.

The clutch torque capacity deriving unit 130 determines that the vehicle behavior is stable based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque.

When the clutch torque capacity deriving unit 130 determines that the vehicle behavior is stable, the clutch torque capacity deriving unit 130 executes the micro slip control through the hydraulic control unit 150 of the clutch, and the cumulative value of the slip amount received at a predetermined predetermined cycle is a predetermined determination reference value. In the above case, an integral value for the slip accumulation value is derived.

 When the slip accumulation value integration value is greater than or equal to a preset threshold, the clutch controller 130 receives the clutch input torque and the clutch pressure and derives the torque capacity based on the received clutch pressure torque and the clutch pressure.

At this time, the hydraulic pressure of the clutch for the micro slip execution is provided to the clutch 100 between the highest threshold value and the lowest threshold previously stored for the micro slip control, the clutch 100 is a minute to improve the feeling of shifting and to reduce the impact at the start Slip.

Receives and accumulates the slip amount (the difference between the input speed and the output speed of the clutch) generated by the clutch 100 at a predetermined period, and receives the slip amount when the slip accumulation value is greater than or equal to a predetermined threshold and the integral value for the slip accumulation value is greater than or equal to a threshold. The torque capacity is derived from the ratio of the clutch input torque and the input pressure.

The torque capacity derived from the clutch torque capacity deriving unit 130 proceeds to the clutch torque capacity learning unit 150.

The clutch torque capacity learning unit 150 executes learning about the derived torque capacity, the clutch input torque of a predetermined period, and the torque capacity derived based on the preset maximum torque and the minimum torque, updates the learning value, and stores the updated torque value. .

That is, the clutch torque capacity learning unit 150 derives the clutch input torque difference which is input to at a predetermined time (i, j) of a predetermined period, and is derived before the derived input torque difference and the predetermined time point of the predetermined period. The torque capacity learning value is derived from the preset proportional relationship by receiving the previous torque capacity, the acceleration signal change amount, and the input torque error.

The current torque capacity learning value can be derived using a well-known clutch transmission torque proportional relation, and the clutch transmission torque proportional relation is as shown in the following equation.

Torque capacity learning value = previous torque capacity + input torque error * exp ^{-1 (acceleration signal change amount)}

Subsequently, the clutch torque capacity learning unit 150 selects a torque capacity having a smaller value among the torque capacity learning value and the preset maximum torque, and outputs a torque capacity having a large value among the selected torque capacity and the preset minimum torque.

In addition, when it is determined that the derived torque capacity exists within the maximum torque and the lowest torque range, the clutch torque capacity learning unit 1500 updates the derived torque capacity with a torque capacity learning value and stores the updated torque capacity.

Meanwhile, the clutch torque capacity learning unit 150 corrects the stored torque capacity learning value to a preset correction torque according to the oil temperature variation, and generates a hydraulic control signal based on the corrected torque capacity learning value to generate the hydraulic control signal. Transmission to the clutch hydraulic control unit 170.

A typical operation of the hybrid vehicle according to the present invention including the functions described above is the same as or similar to that of a general hybrid vehicle, and thus a detailed description thereof will be omitted.

According to the present invention, when it is determined that the vehicle behavior is stabilized based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque, the slip for the slip amount received at a predetermined period during the micro slip control of the clutch is determined. When the cumulative value is greater than or equal to the predetermined threshold value and the integral value of the calculated slip accumulation value is greater than or equal to the preset threshold value, the clutch torque capacity is derived, the clutch torque capacity learning derived for the input torque error is executed, and the learning value for the torque capacity is updated. Since the invention is stored later, only the operation thereof will be described in detail.

A series of processes for deriving the clutch torque capacity and performing learning about the derived clutch torque capacity to update the torque capacity learning value to execute clutch hydraulic pressure control with the correct torque capacity will be described in more detail with reference to FIG. 2.

2 is a flowchart illustrating a torque capacity learning process of the clutch torque capacity learning unit 150 with respect to the torque capacity derived from the clutch torque capacity deriving unit 130 illustrated in FIG. 1, and another embodiment of the present invention will be described with reference to FIG. 2. A vehicle clutch torque capacity learning process according to an embodiment will be described.

First, the clutch torque capacity deriving unit 130 satisfies a predetermined vehicle behavior determination condition based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque through step 301. And the clutch torque capacity is derived by executing the micro slip control through the hydraulic control unit 150 of the clutch when the received vehicle behavior determination condition is satisfied.

The process of deriving the clutch torque capacity is as follows.

The hydraulic control signal is supplied to the clutch 110 at the lowest threshold pressure, the highest threshold pressure, and the lowest threshold pressure generated by the clutch hydraulic controller 150 for the micro slip control.

In addition, the clutch torque capacity deriving unit 130 receives and accumulates the received slip amount at a predetermined predetermined period during the micro slip control, compares the slip accumulation value with the predetermined determination reference value, and when the slip accumulation value is greater than or equal to the determination reference value. Proceeding to step 311, an integral value for the slip accumulation value is derived.

The derived integral value and the predetermined threshold value for the slip accumulation value are compared in the clutch torque capacity derivation unit 130, and when the comparison result is the clutch input torque and the clutch input pressure ratio when the integral value for the slip accumulation value is greater than or equal to the preset threshold value. Derive the capacity.

The torque capacity supplied from the clutch torque capacity deriving unit 130 is provided to the torque capacity learning unit 150.

The clutch torque capacity learning unit 150 receives the input torques Xi and Xj at a predetermined time point i, j of a predetermined period through step 303 and derives an error of the received input torque ( Step 305).

The clutch torque capacity learning unit 150 derives a current clutch torque capacity learning value based on a previous torque capacity, an input torque error, and an acceleration signal variation amount derived before the predetermined time points i and j (step 307).

Then, the clutch torque capacity learning unit 150 derives a torque capacity having a larger value between the current clutch torque capacity learning value and a preset maximum torque and a torque capacity having a larger value among the preset minimum torque (step 309).

Meanwhile, the clutch torque capacity learning unit 150 determines whether the torque capacity derived in step 309 exists within the minimum torque and the maximum torque range, and as a result of the determination, the torque capacity exists within the minimum torque and the maximum torque range. In this case, the torque capacity derived in step 309 is updated with the torque capacity learning value and then stored (steps 311 and 313).

Subsequently, the clutch torque capacity learning unit 150 corrects the torque capacity learning value derived in the step 313 to a preset correction torque according to a change in oil temperature, and generates a hydraulic control signal based on the corrected torque capacity learning value. The generated hydraulic control signal is transmitted to the clutch hydraulic controller (step 315). Here, the correction torque against the fluctuation of the oil temperature is stored in advance as calibration data.

On the other hand, the derived torque capacity is provided to the clutch hydraulic pressure control unit 170, the clutch hydraulic pressure control unit 170 generates a hydraulic control signal reflecting the derived torque capacity to provide to the clutch 100.

In addition, when the torque capacity learning value does not exist within a predetermined range consisting of the minimum torque and the maximum torque in the step 311, the torque capacity learning value is set to an initial value and then the step is performed to derive the torque capacity learning value of the next predetermined period. Proceeds to 301 (step 317).

According to an embodiment of the present invention, when the vehicle behavior is stabilized, at a time when the slip accumulation value for the slip amount received at a predetermined period when the clutch is micro slip controlled is greater than or equal to a predetermined determination threshold value and the integral value of the calculated slip accumulation value is greater than or equal to the threshold value. The clutch pressure and the clutch input torque ratio are derived as the torque capacity, and for the input torque error and the acceleration signal variation, learning about the derived torque capacity is performed to update and store the learning value for the torque capacity, and then store the stored torque. The capacity learning value is corrected by the correction torque reflecting the oil temperature change and then provided by the clutch hydraulic pressure control.

Therefore, it is possible to derive accurate torque capacity by actively learning torque capacity against error of input torque and oil temperature, resulting in inaccurate control of torque capacity reflecting return spring rebound pressure, clutch degradation, and piston characteristic change. It is possible to fundamentally eliminate the deterioration of ride comfort and the deterioration of the shift feeling caused by excessive slip of the clutch during driving.

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.

When the vehicle behavior is stabilized, the clutch pressure and clutch input torque ratio are adjusted when the slip accumulation value for the slip amount received at a predetermined period during the micro slip control of the clutch is greater than or equal to a predetermined threshold and the integral value of the calculated slip accumulation value is greater than or equal to the threshold value. Derived from the torque capacity, the learning about the derived torque capacity is updated and stored after updating the learning value for the torque capacity, and the stored torque capacity learning value is corrected with the corrected torque reflecting the oil temperature change and then provided by the clutch hydraulic control. Therefore, it is possible to derive accurate torque capacity by actively learning torque capacity against error of input torque and oil temperature, resulting in inaccurate control of torque capacity reflecting return spring rebound pressure, clutch degradation, and piston characteristic change. Decreased riding comfort due to excessive slip of the clutch during driving The vehicle clutch torque capacity learning device method and device that can fundamentally eliminate the deterioration of the shift feeling can bring a great advancement in terms of accuracy and reliability of operation, and furthermore, in terms of performance efficiency. This is not only sufficient but also practically evident, and thus it is an invention with industrial applicability.

Claims (4)

A clutch for transmitting power of the vehicle to the transmission;
When it is determined that the vehicle behavior is stabilized based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque, the slip accumulation value for the slip amount received at a predetermined period during the micro slip control of the clutch is determined. A clutch torque capacity deriving unit for deriving the clutch torque capacity at a time point that is equal to or greater than a predetermined determination reference value and the integrated value of the calculated slip accumulation value is equal to or greater than a predetermined threshold value;
A clutch torque capacity learning unit for learning about the derived clutch torque capacity and updating a learning value for torque capacity with respect to an error in the input torque and an amount of change in the acceleration signal received at a predetermined point in a predetermined period; And
And a clutch hydraulic drive unit configured to execute hydraulic control and transmit the hydraulic control signal to the clutch based on the hydraulic control signal set based on the clutch torque capacity learning value. A vehicle behavior determination process of determining that the vehicle behavior is stable based on the change amount of the acceleration signal, the change amount of the input torque of the clutch, the change amount of the vehicle speed, and the absolute value of the clutch input torque;
When the vehicle behavior is stable, the clutch input torque and the clutch input received when the slip accumulation value for the slip amount received at a predetermined period during the micro slip control of the clutch is greater than or equal to a preset determination threshold and the integral value of the calculated slip accumulation value is greater than or equal to the threshold value. Torque capacity deriving process for deriving torque capacity based on pressure; And
The torque capacity derivation process is applied to the variation of the input torque error and the acceleration signal by receiving the torque capacity derived before the predetermined time point of the predetermined period, the clutch input torque input at the predetermined time point of the predetermined period, and the preset maximum torque and the lowest torque. A clutch torque capacity learning method for a vehicle comprising: a torque capacity learning process for executing learning about the torque capacity derived from and updating and storing the torque capacity learning value. The method of claim 2, wherein the torque capacity learning process,
An input torque difference calculating step of receiving an input torque received at a predetermined point in a predetermined period and calculating an input torque difference;
A torque capacity learning value deriving step of deriving a current torque capacity learning value from a preset proportional relationship by receiving the input torque difference and a change in torque capacity and an acceleration signal before a predetermined time point of the predetermined period;
A torque capacity deriving step of deriving a torque capacity having a smaller value among the current torque capacity learning value and a preset maximum torque and a torque capacity having a larger value among the preset minimum torques; And
And a torque capacity updating step of updating and then storing the derived torque capacity to a torque capacity learning value when the derived torque capacity exists within the range of the highest torque and the lowest torque. . The method of claim 3, wherein the torque capacity updating step,
The vehicle is characterized in that it is provided to correct the stored torque capacity learning value to the preset correction torque according to the oil temperature change and generate a hydraulic control signal based on the corrected torque capacity learning value and transmit the generated hydraulic control signal to the clutch hydraulic controller. How to learn clutch torque capacity.

Images