KR101999472B1 - Control method for studying clutch touch point - Google Patents

Abstract

The present invention relates to a clutch that provides a compensation method capable of detecting a non-oscillation impossible state of a vehicle as a learned value due to clutch touch point erroneous learning of a shift system, To a touch point learning control method. The present invention relates to a method of performing shift automation through clutch touch point learning through a TCU, the method comprising the steps of: a) attempting to oscillate a vehicle with a Clutch Stroke1 value pre-stored through pre- ; b) The TCU determines whether the engine speed Ne during the oscillation in the step is greater than a predetermined value Ne1 and the variation amount of the TM input shaft rotation number Ni is smaller than a specified value? , Determining that the clutch touch point miss learning is performed; c) If it is determined that the touch point is missed, the engine speed Ne that is raised by the touch point erroneous learning and driver APS operation is limited to Ne1 as a specific value through ETL (Engine Torque Limit) or ETR (Engine Torque Request) step; (dNi / dt > = beta) is added to the TM input shaft rotation number Ni directly coupled to the wheel when the clutch reaches the touch point, while the ClutchStroke is increased by + [mm] And learning the touch point with the corresponding ClutchStroke 2 to perform the post-correction oscillation.

Description

[0001] CONTROL METHOD FOR STUDYING CLUTCH TOUCH POINT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch touch point learning control method, and more particularly, to a clutch touch point learning control method for clutch tactile miss learning detection and re-learning of a transmission system vehicle.

Generally, in the clutch curve (torque-stroke characteristic curve) applied to a vehicle, the touch point is an important control element as a starting point for transmitting the power of the engine to the transmission side through the clutch by engaging the transmission side plate and the engine side plate.

For example, in the DCT system, learning of the clutch curve is performed by periodically learning the touch point of the clutch, which is mainly in the connection standby state, of the two clutches.

For example, in the case where the vehicle is stationary, since the first clutch for transmitting power to the first gear is being driven, the next touch point of the second clutch connected to the second gear, that is, the second gear, is learned. In the case of driving in a city with a large amount of traffic, a stop situation frequently occurs, so that the opportunity of learning a touch point of the first clutch connected to the first gear is inevitably relatively small.

Thus, when shift automation is applied through a transmission control unit (TCU) in a shift system including a conventional clutch, logic for learning a clutch touch point is applied to the TCU, and this learning value is used when the vehicle is stopped during a stop.

However, such a conventional technique requires a method of re-learning (re-learning) when there is an error in a learned touch point due to an abnormal reason, but does not provide such a re-learning method. If there is no compensation method or a problem There has been a problem in that the vehicle can not be oscillated.

Korean Registered Patent No. 10-1768059 (August 14, 2017)

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-described problems of the prior art, and it is an object of the present invention to provide a clutch control system, And provides a compensation method that can oscillate the clutch touch point learning control method.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a clutch touch point learning control method according to the present invention is a method for performing shift automation through clutch touch point learning through a TCU, the method comprising the steps of: a) Attempting to oscillate the vehicle with a touch point stroke Clutch Stroke1 value; b) The TCU determines whether the engine speed Ne during the oscillation in the step is greater than a predetermined value Ne1 and the variation amount of the TM input shaft rotation number Ni is smaller than a specified value? , Determining that the clutch touch point miss learning is performed; c) If it is determined that the touch point is missed, the engine speed Ne that is raised by the touch point erroneous learning and driver APS operation is limited to Ne1 as a specific value through ETL (Engine Torque Limit) or ETR (Engine Torque Request) step; (dNi / dt > = beta) is added to the TM input shaft rotation number Ni directly coupled to the wheel when the clutch reaches the touch point, while the ClutchStroke is increased by + [mm] And learning the touch point with the corresponding ClutchStroke 2 to perform the post-correction oscillation.

In the step a), the gear is coupled to the oscillation step number so that the TM input shaft rotation number Ni and the wheel of the vehicle are directly connected.

In the step d), it is performed based on the recently learned clutch touch point every time the vehicle is stopped after the vehicle is stopped, and it is detected by the oscillation non-occurrence learning and re-learned by touch point re-learning.

In step b), if the learned touch point is maintained and Ne is maintained for a predetermined time longer than a specific rpm Ne1, the clutch stroke may be increased in the Engage direction, and the tilting of the Ni may be observed to perform touch point re- .

Other specific details of the invention are included in the detailed description and drawings.

According to the clutch touch point learning control method of the present invention configured as described above, it is possible to immediately detect and re-learn the clutch touch point during the stopping of the vehicle, and to improve the clutch controllability, , And the completeness can be increased.

Also, the compensating method in the clutch touch point learning method is a SW element, and there are few factors to increase the product cost, and the safety and completeness of the vehicle are increased, thereby improving the commerciality of the vehicle.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a block diagram of a shift system for implementing a clutch touch point learning control method according to the present invention;
FIG. 2 is a flowchart illustrating a clutch touch point learning control method according to the present invention;
3 is a graph for explaining a clutch touch point learning control method according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, Is provided to fully convey the scope of the present invention to a technician, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element. Like reference numerals refer to like elements throughout the specification and "and / or" include each and every combination of one or more of the elements mentioned. Although "first "," second "and the like are used to describe various components, it is needless to say that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense that is commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term "below" can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a shift system for implementing a clutch touch point learning control method according to the present invention, FIG. 2 is a flowchart illustrating a clutch touch point learning control method according to the present invention, FIG. FIG. 7 is a graph for explaining a clutch touch point learning control method. FIG.

1, a shift system for implementing a clutch touch point learning control method according to the present invention includes an engine 100, a transmission 200 including a clutch 210 and a gear box 220, And a vehicle wheel (300).

The transmission 200 functions to transmit the power of the engine to the vehicle wheel 300 through the clutch 210 by operating the gear box 220 of the driver so that the transmission side plate and the engine side plate are in contact with each other.

At this time, as described above, the touch point is an important control element as a starting point for transmitting the power of the engine to the transmission side through the contact between the transmission side plate and the engine side plate.

In applying the shift automation through a TCU (Transmission Control Unit), the present invention detects the clutch touch point when the vehicle has learned the clutch touch point for some abnormal reason and immediately re-learns the clutch touch point, And to improve the completeness.

For this purpose, as shown in FIG. 2, a method of detecting and compensating for a clutch touch point o learning and stopping in a vehicle of a shift system of the present invention is implemented.

2 and 3, the present invention is characterized in that the engine rpm Ne [rpm], the TM input shaft rpm Ni [rpm], the clutch touch point stroke [mm], the APS Position Sensor) [%], BPS (Brake Position Sensor) [%], VSP (Vehicle Speed) [kph].

First, as shown in FIG. 2, the driver attempts to start the vehicle in a stationary state (S10). At this time, the vehicle tries to oscillate with the pre-stored clutch touch point stroke Clutch Stroke1 value through the previous learning.

At this time, since the gear 220 is engaged with the oscillation step, the TM input shaft rotation number Ni and the wheel 300 of the vehicle are directly connected (S20).

The TCU determines whether or not the engine speed Ne during the oscillation in the above step is greater than a predetermined value Ne1 and the variation amount of the TM input shaft rotation speed Ni is smaller than the specified value beta. It is determined that the touch point is miss learning (S30 to S40).

If it is determined that the touch point is missed, the engine speed Ne that is raised by the touch point erroneous learning and the operation of the driver APS is limited to Ne1 as a specific value through ETL (Engine Torque Limit) or ETR (Engine Torque Request) ).

ClutchStroke is increased by + [mm] in a state where Ne is limited (S60).

At this time, it is determined whether the change amount (dNi / dt> =?) Is generated in the TM input shaft rotation number Ni directly connected to the wheel 300 by reaching the touch point at step S70 and the touch point is learned by the corresponding ClutchStroke2, (S80).

The process of FIG. 2 described above is performed based on the clutch touch point learned recently at every oscillation after the stop, detected by the oscillation non-occurrence learning, and re-learned by touch point re-learning.

 An example of the operation of the logic to detect and re-learn and correct the clutch touch point o learning during vehicle oscillation in the above process is as shown in Fig.

As shown in FIG. 3, the present invention maintains a learned touch point and increases the clutch stroke to the Engage direction when Ne is maintained for a predetermined time longer than a specific rpm (Ne1), observes the tilt of Ni, .

Therefore, in the prior art, when a situation in which oscillation can not be achieved by the clutch touch point o learning during vehicle oscillation occurs, it was the best way to determine that there was a failure without stopping the vehicle control without the re-learning logic of the present invention.

 However, when the logic of the present invention is applied, it is possible to detect the impossibility of the oscillation by the clutch touch point o learning and to instantaneously learn the touch point and oscillate, thereby preventing the vehicle from being oscillated.

The embodiments of the present invention described in the present specification and the configurations shown in the drawings relate to the most preferred embodiments of the present invention and are not intended to encompass all of the technical ideas of the present invention so that various equivalents And variations are possible. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined in the appended claims. , And such changes are within the scope of the claims.

100: engine
200: Transmission
210: clutch
220: Gearbox
300: vehicle wheel

Claims (4)

CLAIMS 1. A method for performing shift automation through clutch touch point learning via a TCU,
a) attempting to oscillate the vehicle with a pre-stored clutch touch point stroke Clutch Stroke1 value through previous learning in a vehicle stop state;
b) The TCU determines whether the engine speed Ne during the oscillation in the step is greater than a predetermined value Ne1 and the variation amount of the TM input shaft rotation number Ni is smaller than a specified value? , Determining that the clutch touch point miss learning is performed;
c) If it is determined that the touch point is missed, the engine speed Ne that is raised by the touch point erroneous learning and driver APS operation is limited to Ne1 as a specific value through ETL (Engine Torque Limit) or ETR (Engine Torque Request) step;
(dNi / dt > = beta) is added to the TM input shaft rotation number Ni directly coupled to the wheel when the clutch reaches the touch point, while the ClutchStroke is increased by + [mm] And learning the touch point with the corresponding ClutchStroke 2 to perform the post-correction oscillation. The method according to claim 1,
In the step a)
And the gear is coupled to the oscillation step so that the TM input shaft and the wheel of the vehicle are directly connected. The method according to claim 1,
In the step b)
Wherein the learning is performed based on the clutch touch point that has been learned recently each time the vehicle is stopped after the vehicle has been stopped, and is detected by the non-oscillation impossibility learning and is re-learned by re-learning the touch point. The method according to claim 1,
In the step d)
And the touch point re-learning is performed by increasing the clutch stroke to the Engage direction and observing the tilt of the Ni when the Ne is maintained for a predetermined time longer than the specific rpm Ne1 while maintaining the learned touch point. Control method.

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