KR20180121735A - Apparatus and method for controlling shift of dct system - Google Patents

Abstract

Disclosed are a shift control apparatus for a DCT system and a method thereof. According to the present invention, the shift control apparatus for a DCT system comprises: a curve running condition determination unit determining whether or not a vehicle is in a curve running condition; and a control unit controlling up-shift in accordance with the determination result of the curve running condition determination unit when the running condition of the vehicle satisfies an up-shift condition.

Description

TECHNICAL FIELD [0001] The present invention relates to a shift control apparatus and method for a DCT system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift control apparatus and method for a DCT (Dual Clutch Transmission) system, and more particularly, to a shift control apparatus and method for a DCT system for delaying an upshift in a curve running state.

The dual clutch transmission (DCT) system has two clutches, and two clutches are connected via a clutch actuator, respectively, in the hole means and the even means to transmit or block the power of the engine .

The DCT system has the effect of reducing the time during which the output torque of the engine is disconnected, as well as increasing the fuel efficiency by eliminating the torque converter, compared with a conventional automatic transmission system.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Application Publication No. 10-2015-0024212 (Feb.

The conventional DCT system performs the shift control according to the vehicle speed and the opening rate of the throttle valve. In addition to performing the shift control without considering whether the vehicle is in the current curve driving state, the shift control is performed only in accordance with the vehicle speed and the opening rate of the throttle valve. So that there is a problem in that the running feeling on the straight road and the curve road is different.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a vehicle performance control system and a control method thereof, which is capable of delaying an upshift if the running condition of the vehicle satisfies an upshift condition, And to provide a shift control device and method of a DCT system.

A shift control device of a DCT system according to one aspect of the present invention includes: a curve driving state determination unit for determining whether a vehicle is in a curve driving state; And a control unit for controlling the upshift in accordance with the determination result of the curve running condition determination unit if the running condition of the vehicle satisfies the UP SHIFT shift condition.

The control unit of the present invention is characterized in that the curve shift state determination unit delays the upshift when the vehicle is in a curve running state as a result of the determination.

The curve driving state determining unit may include a first lateral acceleration calculating unit for calculating a lateral acceleration using a steering angle and a vehicle speed; A second lateral acceleration calculating unit for calculating a lateral acceleration using a difference between the left wheel and the right wheel; A lateral acceleration collection unit for collecting lateral acceleration from the ESP controller; And at least one of a lateral acceleration calculated by the first lateral acceleration calculation unit, a lateral acceleration calculated by the second lateral acceleration calculation unit, and a lateral acceleration collected by the lateral acceleration collection unit, And a lateral acceleration determining unit for determining whether or not the vehicle is in a running state.

The lateral acceleration determining section of the present invention determines at least one of the lateral acceleration calculated by the first lateral acceleration calculating section, the lateral acceleration calculated by the second lateral acceleration calculating section, and the lateral acceleration collected by the lateral acceleration acquiring section And determines that the vehicle is in a curve driving state if one of the vehicle speeds is equal to or greater than a predetermined set value.

The control unit of the present invention is characterized in that when the curve running state is released while the upshift is being delayed, the upshift is performed.

According to an aspect of the present invention, there is provided a shift control method of a DCT system, including: determining whether a running state of a vehicle satisfies an upshift condition; Determining whether a curve driving state determination unit is in a curve driving state; And controlling the upshift transmission in accordance with a result of the determination by the curve running condition determiner when the running condition of the vehicle satisfies the upshift condition.

The step of determining whether or not the vehicle is in a curve driving state includes the steps of calculating a lateral acceleration calculated using a steering angle and a vehicle speed, a lateral acceleration calculated using a difference between a left wheel wheel speed and a right wheel wheel speed, And the lateral acceleration of the vehicle is used to determine whether or not the vehicle is in a curve running state.

The step of determining whether or not the vehicle is in a curve driving state includes the steps of calculating a lateral acceleration calculated using a steering angle and a vehicle speed, a lateral acceleration calculated using a difference between a left wheel wheel speed and a right wheel wheel speed, And the lateral acceleration is greater than or equal to a predetermined set value, it is determined that the vehicle is in the curve running state.

The step of controlling the upshift shift according to the present invention is characterized in that the upshift is delayed when the vehicle is in a curve running state.

When the curve running state is released while the control section of the present invention is delaying the upshift, performing the upshift.

An apparatus and method for controlling a shift of a DCT system according to an aspect of the present invention is a system and method for delaying an upshift when a vehicle is in a curve driving state to secure power performance in a curve driving state, The gear command may be set differently according to the driving tendency during driving.

1 is a block diagram of a shift control device of a DCT system according to an embodiment of the present invention.
2 is a block diagram of a driving situation determination unit according to an embodiment of the present invention.
3 is a conceptual diagram illustrating an operation of the controller according to an embodiment of the present invention.
4 is a flowchart of a shift control method of a DCT system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an apparatus and method for controlling a shift of a DCT system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a block diagram of a shift control device of a DCT (Dual Clutch Transmission) system according to an embodiment of the present invention, FIG. 2 is a block diagram of a driving situation determination unit according to an embodiment of the present invention, Is a conceptual diagram illustrating the operation of the controller according to an embodiment of the present invention.

Referring to FIG. 1, a shift control apparatus of a DCT system according to an embodiment of the present invention includes a curve running state determination unit 10 and a control unit 20. As shown in FIG. Here, the shift control device of the DCT system may be provided in a transmission mechanism, for example, a TCU (Transmission Control Unit) for operating the release side clutch and the engagement side clutch to shift to the target stage.

The curve running condition determination unit 10 determines whether or not the vehicle is in a curve running condition.

The curve running condition determining unit 10 is connected to the vehicle speed sensor 40, the steering angle sensor 50, the left wheel speed sensor 60, the right wheel speed sensor 70 and the ESP (Electronic Stability Program) And determines whether or not the vehicle is in a curve driving state using the information transmitted from each of them.

The vehicle speed sensor 40 senses the vehicle speed. The vehicle speed sensor 40 is not particularly limited, and the vehicle speed may be calculated using the number of revolutions of the gear, or may be detected through other navigation systems or the like.

The steering angle sensor 50 senses the steering angle of the steering wheel.

The left wheel speed sensor 60 senses the wheel speed of the left wheel of the vehicle, and the right wheel speed sensor 70 senses the wheel speed of the right wheel of the vehicle.

The ESP controller 70 controls the four wheels independently of the vehicle road surface by stabilizing the vehicle by increasing or decreasing the braking force according to the lateral acceleration or the closing speed of the vehicle. The ESP controller 80 inputs the above-described lateral acceleration into the curve driving state determination unit 10.

2, the curve running state determination unit 10 includes a first lateral acceleration calculating unit 11, a second lateral acceleration calculating unit 12, a lateral acceleration collecting unit 13, and a lateral acceleration determining unit 14, .

The first lateral acceleration calculating unit 11 calculates the lateral acceleration using the steering angle sensed by the steering angle sensor 50 and the vehicle speed sensed by the vehicle speed sensor 40 and then outputs the calculated lateral acceleration as the lateral acceleration (14).

The second lateral acceleration calculating section 12 calculates the lateral acceleration using the difference between the left wheel wheel speed sensed by the left wheel speed sensor 60 and the right wheel wheel sensed by the right wheel speed sensor 70, The lateral acceleration is input to the lateral acceleration determining unit 14. [

The lateral acceleration collection unit 13 collects the lateral acceleration from the ESP controller 80 and inputs the collected lateral acceleration to the lateral acceleration determination unit 14. [

The lateral acceleration determining unit 14 receives the lateral acceleration from each of the first lateral acceleration calculating unit 11, the second lateral acceleration calculating unit 12 and the lateral acceleration collecting unit 13, It is determined whether or not the curve is in a running state.

In other words, the lateral acceleration determining unit 14 determines whether or not the lateral acceleration inputted from the first lateral acceleration calculating unit 11, the lateral acceleration calculated by the second lateral acceleration calculating unit 12, and the lateral acceleration calculated by the lateral acceleration calculating unit 13 And determines that the vehicle is in a running state if at least one of the lateral accelerations collected by the driver is greater than or equal to a predetermined set value.

Here, the set value is set in advance as a lateral acceleration that can be determined to be a curve running state of the vehicle, and these first lateral acceleration calculating section 11, second lateral acceleration calculating section 12 and lateral acceleration collecting section 13 is greater than or equal to the set value, it can be determined that the vehicle is in the curve running state.

In this way, the lateral acceleration determining unit 14 determines whether or not the vehicle is in the curve traveling state by using the first lateral acceleration calculating unit 11, the second lateral acceleration calculating unit 12 and the lateral acceleration collecting unit 13 By using all the lateral accelerations, it is possible to more accurately determine whether or not the vehicle is in the curve running state, and to further improve the reliability of the shift control.

When the UP SHIFT shift condition is satisfied, the control unit 20 delays the upshift in accordance with the determination result of the curve running condition determiner 10.

Referring to FIG. 3, the control unit 20 determines whether the running state of the vehicle satisfies the upshift condition. If the upshift condition is satisfied, the controller 20 determines whether the vehicle is in the curve running condition.

That is, the control unit 20 determines whether or not the upshift condition is satisfied. The control unit 20 sets an arbitrary target stage on the basis of the predetermined shift line in accordance with the opening degree of the vehicle speed and the throttle valve, It is determined whether or not the shift condition is satisfied.

When the running state of the vehicle satisfies the upshift condition, the control unit 20 determines whether the vehicle is in a curve running state through the lateral acceleration determining unit 14. [ At this time, if the vehicle is in a curve running state, the control unit 20 delays the upshift even if the upshift condition is satisfied, as described above.

Therefore, even if the vehicle is in the curve running state, even if the upshift condition is satisfied, the upshift is not performed, thereby preventing upshift from occurring in the curve running condition.

Further, when the curve running state is released while the upshift is being delayed as described above, the control unit 20 performs the upshift.

Hereinafter, a shift control method of the DCT system according to an embodiment of the present invention will be described in detail with reference to FIG.

4 is a flowchart of a shift control method of a DCT system according to an embodiment of the present invention.

Referring to FIG. 4, first, the control unit 20 determines whether the running state of the vehicle satisfies the upshift condition (S10).

In this case, the control unit 20 can calculate the target stage based on the speed change line in accordance with the vehicle speed and the opening degree of the throttle valve, and determine whether the upshift condition is satisfied through the target stage.

If the running state of the vehicle satisfies the upshift shift condition as a result of the determination in step S10, the control unit 20 delays the upshift in accordance with whether the vehicle is in the curve running state through the lateral acceleration determining unit 14. [

That is, the curve driving state determination unit 10 determines the driving state of the vehicle based on the vehicle speed sensor 40, the steering angle sensor 50, the left wheel speed sensor 60, the right wheel speed sensor 70, and the ESP controller 80 (S20). ≪ / RTI >

In this case, the first lateral acceleration calculating section 11 calculates the lateral acceleration using the steering angle sensed by the steering angle sensor 50 and the vehicle speed sensed by the vehicle speed sensor 40, and outputs the calculated lateral acceleration as the lateral acceleration And inputs it to the judgment unit (14).

The second lateral acceleration calculating unit 12 calculates the lateral acceleration using the difference between the left wheel wheel speed sensed by the left wheel speed sensor 60 and the right wheel wheel sensed by the right wheel speed sensor 70, And inputs a lateral acceleration to the lateral acceleration determining unit 14. [

The lateral acceleration collection unit 13 collects the lateral acceleration from the ESP controller 80 and inputs the collected lateral acceleration to the lateral acceleration determination unit 14. [

The lateral acceleration determining unit 14 determines whether the lateral acceleration inputted from the first lateral acceleration calculating unit 11, the lateral acceleration calculated by the second lateral acceleration calculating unit 12, and the lateral acceleration calculated by the lateral acceleration collecting unit 13 At step S30, it is determined whether at least one of the lateral accelerations is equal to or greater than a preset value by comparing each of the collected lateral accelerations with a set value.

At this time, the lateral acceleration determining unit 14 determines the lateral acceleration based on the lateral acceleration inputted from the first lateral acceleration calculating unit 11, the lateral acceleration calculated by the second lateral acceleration calculating unit 12, If the at least one of the lateral accelerations is greater than or equal to the set value, it is determined that the vehicle is in the curve running state.

As a result of the determination in step S30, if the vehicle is in the curve running state, the control unit 20 delays the upshift (S40) so that upshift is performed even when the vehicle is in the curve driving state even if the upshift condition is satisfied .

On the other hand, if it is determined in step S30 that the vehicle is not in the curve running state, the control unit 20 causes the upshift to be performed (S50). Thus, when the curve running state is released while the upshift is being delayed, the control unit 20 performs the upshift.

As described above, the shift control apparatus and method of the DCT system according to an embodiment of the present invention can maintain the power performance in the curve driving state by delaying the upshifting if the vehicle is in a curve driving state, The gear command may be set differently according to the driving tendency during driving.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Curve driving situation determination unit
11: First lateral acceleration calculating section
12: second lateral acceleration calculating section
13: lateral acceleration collecting unit
14: lateral acceleration determining unit
20:
40: vehicle speed sensor
50: steering angle sensor
60: Left wheel speed sensor
70: Right wheel speed sensor
80: ESP controller

Claims (10)

A curve driving state determination unit for determining whether the vehicle is in a curve driving state; And
And a control section for controlling the upshift in accordance with the determination result of the curve running condition determination section if the running condition of the vehicle satisfies the UP SHIFT shift condition.
2. The shift control device of a DCT system according to claim 1, wherein the controller delays the upshift when the vehicle is in a curve driving condition as a result of the determination by the curve running condition determiner.
The apparatus according to claim 1, wherein the curve driving condition determining unit
A first lateral acceleration calculating unit for calculating the lateral acceleration using the steering angle and the vehicle speed;
A second lateral acceleration calculating unit for calculating a lateral acceleration using a difference between the left wheel and the right wheel;
A lateral acceleration collection unit for collecting lateral acceleration from the ESP controller; And
The lateral acceleration calculated by the first lateral acceleration calculating section, the lateral acceleration calculated by the second lateral acceleration calculating section, and the lateral acceleration collected by the lateral acceleration acquiring section, And a lateral acceleration determining unit for determining whether or not the state of the vehicle is detected.
The lateral acceleration calculating apparatus according to claim 3, wherein the lateral acceleration determining unit includes a lateral acceleration calculated by the first lateral acceleration calculating unit, a lateral acceleration calculated by the second lateral acceleration calculating unit, and a lateral acceleration calculated by the lateral acceleration collecting unit Wherein the controller determines that the vehicle is in a curve driving state when at least one of acceleration and deceleration is equal to or greater than a predetermined set value.
The shift control device of a DCT system according to claim 1, wherein the control section performs an upshift when the curve running state is released while the upshift is being delayed.
Determining whether the running condition of the vehicle satisfies an upshift condition;
Determining whether a curve driving state determination unit is in a curve driving state; And
And the control unit controls the upshift in accordance with the determination result of the curve running condition determining unit if the running condition of the vehicle satisfies the upshift condition.
The ESP controller according to claim 6, wherein the step of determining whether the vehicle is in a curve driving state includes: calculating a lateral acceleration calculated using a steering angle and a vehicle speed, a lateral acceleration calculated using a difference between a left wheel wheel speed and a right wheel wheel speed, And determining whether or not the vehicle is in a curve running state using at least one of lateral acceleration collected from the vehicle.
The ESP controller according to claim 7, wherein the step of determining whether the vehicle is in a curve driving state includes: calculating a lateral acceleration calculated using a steering angle and a vehicle speed, a lateral acceleration calculated using a difference between a left- When the at least one of the lateral accelerations is greater than or equal to a predetermined set value, determines that the vehicle is in a curve driving state.
7. The shift control method of a DCT system according to claim 6, wherein the step of controlling the upshift shifts the upshift of the DCT system when the vehicle is in a curve running state.
10. The shift control method of claim 9, further comprising performing an upshift when the curve running state is released while the control unit is delaying the upshift.

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