KR102263136B1 - Pre-load Control Method For Improving Lock-Up Entering Response of Damper Clutch - Google Patents

Abstract

Disclosed is a pre-load control method for improving the lock-up entry response of a damper clutch. According to an embodiment of the present invention, the pre-load control method for improving the lock-up entry response of a damper clutch comprises: a pre-load logic entry condition determination step of performing a pre-load learning entry condition determination step if a preset criterion is satisfied based on state information of a vehicle if a request for transitioning to a lock-up state of a damper clutch is received while the damper clutch is opened; a pre-load learning entry condition determination step of performing a pre-load learning step if a preset criterion is satisfied based on the state information of the vehicle; a pre-load learning step of calculating a pre-load correction value in the current state of the vehicle; and a target pre-load determination step of summing a preset basic pre-load and the pre-load correction value to determine a target pre-load, and then applying the target pre-load to the damper clutch.

Description

Pre-load Control Method For Improving Lock-Up Entering Response of Damper Clutch

The present invention relates to a preload control method for improving the damper clutch lock-up entry responsiveness, and more particularly, to a damper clutch that is in an open state to quickly enter into a lock-up state. It relates to a preload control method for improving the damper clutch lockup entry responsiveness including the configuration.

An automatic transmission according to the prior art is a transmission that automatically performs a shift according to a driving state.

In such an automatic transmission, torque of an engine is transmitted to the transmission by a torque converter, and the torque converter is configured to transmit torque by a flow of hydraulic oil, so that slip occurs.

In order to reduce the slippage, a damper clutch is provided in the torque converter, and the engine and the transmission are directly connected by driving the damper clutch in a predetermined driving state, thereby improving fuel efficiency and power transmission rate.

However, when driving the damper clutch, in order to prevent abnormal phenomena such as booming occurring when the engine and the transmission are completely directly connected, the engine and the turbine are not completely directly connected, and a certain speed difference is maintained. A control called slip direct connection is used.

When controlling the slip of the damper clutch, the slip amount was set in consideration of the durability limit of the damper clutch and the slip amount according to the input torque. Here, the amount of slip is set by a map according to the output shaft speed of the transmission and the amount of throttle opening, and the amount of slip is generally set to 50 rpm.

On the other hand, the state in which the damper clutch operates and directly transmits engine power to the transmission is called the 'lock up' or 'direct connection' state, and the state in which the damper clutch does not operate and the engine power is transferred to the transmission through the flow of fluid is called 'open'. ' It's called status.

In order for the damper clutch to transition from the open state to the lock-up state, the solenoid valve is controlled through hydraulic pressure, and hydraulic pressure is applied up to a set target value to put the damper clutch into the locked-up state. Since the power transmission efficiency is high due to the direct connection in the locked up state, the fuel efficiency is superior to the open state

According to the prior art, since no control is performed in the open state of the damper clutch, the hydraulic pressure value is 0. Therefore, when entering the lock-up state from the open state, the entry responsiveness is poor because hydraulic pressure must be applied from 0 to the target value for lock-up.

Therefore, there is a need for a technology capable of improving the entry response of the damper clutch.

Korea Patent Publication No. 10-2013-0065434 (published on June 19, 2013)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a preload control method including a configuration capable of improving entry responsiveness when a damper plunger transitions from an open state to a lock-up state.

According to one aspect of the present invention as a means of solving the problem,

As a preload control method for improving the lock-up entry response of a damper clutch,

When a request signal for transition to the lock-up state of the damper clutch is received while the damper clutch is open, the preload learning entry condition determination step when a preset criterion is satisfied based on vehicle state information Preload logic entry condition determination step to perform;

a preload learning entry condition determination step of performing a preload learning step when a preset criterion is satisfied based on vehicle state information;

a preload learning step of calculating a preload correction value in the current state of the vehicle; and

After determining the target preload by summing the preset basic preload and the preload correction value, a target preload determining step to be applied to the damper clutch is provided.

Preferably, in the preload logic entry condition determination step, if a preset criterion is not satisfied, a preload is not applied to the damper clutch.

In addition, in the preload learning entry condition determination step, if a preset criterion is not satisfied, a preset basic preload is not applied to the damper clutch.

Preferably, the basic preload is selected from a basic preload selection map in which the engine speed value is set as the X-axis and the oil temperature value is set as the Y-axis.

Preferably, the preset criteria in the preload logic entry condition determination step and the preload learning entry condition determination step include whether the preload logic activation variable is activated, whether the damper clutch is in an open state, and the shift gear lever position. Whether it is in the drive (D) state, whether it is in the neutral control state (Static, lever operation, neutral control/ISG), the comparison result between the engine speed and the preset reference value, the comparison result between the turbine speed and the preset reference value, One or more may be selected from the group consisting of a comparison result between the output speed and a preset reference value, and a comparison result between the oil temperature and a preset reference value.

At this time, the conditions for performing the preload learning entry condition determination step in the preload logic entry condition determination step are that the preload logic activation variable is ON, the damper clutch is open, and the shift gear lever position is the drive ( D) Status, not in neutral control state (Static, lever operation, neutral control/ISG), engine speed exceeds preset reference value, turbine speed is above preset reference value, output speed is preset reference value It may be one or more selected from the group consisting of the above, the oil temperature being above the preset reference value.

In this case, in the preset reference, when the vehicle is stopped, the conditions may be changed such that the turbine speed is the same as the preset reference value and the output speed is the same as the preset reference value.

In addition, if the preset criteria are not satisfied, a preload is not applied to the damper clutch.

Preferably, the conditions for performing the preload learning step in the preload learning entry condition determination step are that the preload logic activation variable is in an ON state, the damper clutch is in an open state, and the shift gear lever position is a drive (D) It should be in the state of neutral control (Static, lever operation, neutral control/ISG), the engine speed should be less than the preset reference value, the turbine speed should be less than the preset reference value, the output speed should be less than the preset reference value, oil temperature At least one may be selected from the group consisting of less than or equal to the preset reference value.

In this case, if the preset criterion is not satisfied, a preset basic preload is applied to the damper clutch.

Preferably, the preload learning step comprises:

a first average slip amount calculation step of detecting an average slip amount in an open state of the damper clutch;

a basic preload application step of applying a basic preload to the damper clutch;

a second average slip amount calculation step of detecting an average slip amount in a state in which a basic preload is applied to the damper clutch; and

and a preload correction value calculation step of selecting a preload correction value by calculating a difference value between the value obtained in the first average slip amount calculation step and the value obtained in the second average slip amount calculation step.

In this case, the preload correction value may be selected from a preload correction value selection map in which the oil temperature value is set as the X-axis and the difference value is set as the Y-axis.

According to the preload control method for improving the damper clutch lockup entry responsiveness of the present invention, the preload logic entry condition determination step, the preload learning entry condition determination step, the preload learning step and the target preload determination step for performing a specific process. It is possible to provide a preload control method for improving the damper clutch lock-up entry responsiveness including a configuration capable of improving the entry responsiveness so that the damper clutch, which is in the locked-up state, can quickly enter the lock-up state.

Further, according to the preload control method for improving the damper clutch lockup entry responsiveness of the present invention, the first average slip amount calculation step, the basic preload application step, the second average slip amount calculation step and the preload correction value calculation step of performing a specific process By performing the preload learning step through , it is possible to derive the optimal preload required for the damper clutch, thereby maximizing the improvement of the damper clutch lockup response response.

1 is a configuration diagram illustrating a shift control unit to which a preload control method for improving the damper clutch lockup entry responsiveness according to an embodiment of the present invention is applied.
2 is a flowchart illustrating a preload control method for improving the damper clutch lockup entry responsiveness according to an embodiment of the present invention.
3 is a graph showing the hydraulic pressure applied to the damper clutch for each time section.
4 is a basic preload selection map in which the engine speed value is set as the X-axis and the oil temperature value is set as the Y-axis.
5 is a preload correction value selection map in which the oil temperature value is set as the X-axis and the difference value is set as the Y-axis.

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

In describing the present invention, the terms used in the following specification are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, in this specification, terms such as "comprise" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other It is to be understood that this does not preclude the possibility of addition or presence of features or numbers, steps, operations, components, parts, or combinations thereof.

Also, terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

In addition, terms such as “…unit”, “…unit”, “…module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can

In the description with reference to the accompanying drawings, the same reference numerals will be assigned to the same components, and repeated descriptions of the same components will be omitted. In the description of the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram showing a shift control unit to which a preload control method for improving the damper clutch lockup entry responsiveness according to an embodiment of the present invention is applied, and FIG. 2 is a damper clutch according to an embodiment of the present invention. A flowchart showing a preload control method for improving lockup entry responsiveness is shown.

Referring to these drawings, the preload control method S100 for improving the damper clutch lockup entry responsiveness according to the present embodiment may be stored in the shift control unit TCU 100 in the form of a program. At this time, the program stored in the shift control unit 100 includes the preload logic entry condition determination logic 110 , the preload combined practice condition determination logic 120 , the preload learning logic 130 , and the target preload determination logic 140 . program to do.

As shown in FIG. 2 , the preload control method S100 for improving the damper clutch lockup entry responsiveness according to the present embodiment includes a damper clutch mounted on a vehicle using the shift control unit 100 shown in FIG. 1 . By controlling the preload applied to the , it is possible to improve the lock-up entry response of the damper clutch.

The preload control method (S100) for improving the damper clutch lockup entry responsiveness according to this embodiment includes a preload logic entry condition determination step (S110), a preload learning entry condition determination step (S120), a preload learning step (S130) and a target It is a configuration including the preload determination step (S140).

Specifically, in the preload logic entry condition determination step (S100), when a request signal for transitioning from the damper clutch open state to the lock-up state of the damper clutch is received, the state information of the vehicle is If the preset criteria are satisfied based on the basis, the preload learning entry condition determination step (S120) is performed.

At this time, as shown in FIG. 2 , if the preset criterion is not satisfied, the control logic is terminated without applying a preload to the damper clutch.

The preset criteria used in the preload logic entry condition determination step (S110) are whether the preload logic activation variable is activated, whether the damper clutch is in an open state, and whether the shift gear lever position is in the drive (D) state. , whether it is in the neutral control state (Static, lever operation, neutral control/ISG), the comparison result between the engine speed and the preset reference value, the comparison result between the turbine speed and the preset reference value, the output speed and the preset reference value As a result of comparison with , at least one may be selected from the group consisting of a result of comparison between oil temperature and a preset reference value.

Preferably, the preload learning entry condition determination step (S120) may be performed only when all of the preset criteria used in the aforementioned preload logic entry condition determination step (S110) are satisfied. At this time, the preset criteria are that the preload logic activation variable is ON, the damper clutch is open, the shift gear lever position is in the drive (D) state, and the neutral control state (Static, lever operation, Neutral control/ISG), the engine speed exceeds the preset reference value, the turbine speed is greater than the preset reference value, the output speed is greater than the preset reference value, and the oil temperature is greater than the preset reference value. If any one of the above-mentioned conditions is not satisfied, the preload logic entry condition determination step S110 determines that the preload logic entry condition is not satisfied, and then ends the entire logic as shown in FIG. 2 .

In some cases, when the vehicle is stopped, the above-mentioned preset criteria may be changed. Specifically, when the vehicle is stopped, it is preferable that the conditions are changed such that the turbine speed is the same as the preset reference value and the output speed is the same as the preset reference value.

In addition, as shown in FIG. 2 , when the condition for performing the preload learning entry condition determination step S120 in the preload logic entry condition determination step S110 is not satisfied, as described above, the preload logic entry condition In the determination step S110, the control logic is terminated without applying a preload to the damper clutch.

On the other hand, in the preload learning entry condition determination step (S120), the preload learning step (S130) is performed when a preset criterion is satisfied based on the vehicle state information.

At this time, as shown in FIG. 2 , if the preset criterion is not satisfied, the preset basic preload is applied to the damper clutch and the control logic is terminated.

The above-mentioned basic preload is preferably selected from a basic preload selection map in which the engine speed value is set as the X-axis and the oil temperature value is set as the Y-axis. As shown in FIG. 4 , a preferred basic preload value may be selected based on the engine speed value and the oil temperature value. Specifically, when the oil temperature is 110 degrees Celsius and the engine rotation speed is 2,000 rpm, the basic preload value is selected to be 60%.

The preset criteria used in the preload learning entry condition determination step (S120) are whether the preload logic activation variable is activated, whether the damper clutch is in an open state, and whether the shift gear lever position is in the drive (D) state. , whether it is in the neutral control state (Static, lever operation, neutral control/ISG), the comparison result between the engine speed and the preset reference value, the comparison result between the turbine speed and the preset reference value, the output speed and the preset reference value As a result of comparison with , at least one may be selected from the group consisting of a result of comparison between oil temperature and a preset reference value.

Preferably, the preload learning step (S130) can be performed only when all of the preset criteria used in the above-mentioned preload learning entry condition determination step (S120) are satisfied. At this time, the preset criteria are that the preload logic activation variable is ON, the damper clutch is open, the shift gear lever position is in the drive (D) state, and the neutral control state (Static, lever operation, Neutral control/ISG), the engine speed must be less than the preset reference value, the turbine speed must be less than the preset reference value, the output speed must be less than the preset reference value, and the oil temperature must be less than the preset reference value.

In addition, as shown in FIG. 2 , when the condition for performing the preload learning step S130 in the preload learning entry condition determination step S120 is not satisfied, as described above, the set basic preload is applied to the damper clutch. applied and the entire control logic is terminated.

When all the conditions for performing the preload learning step (S130) in the preload learning entry condition determination step (S120) are satisfied, the preload learning step (S130) is performed.

In the preload learning step ( S130 ), a preload correction value is calculated in the current state of the vehicle.

Specifically, in the preload learning step ( S130 ), as shown in FIG. 2 , four major processes are performed.

In the preload learning step (S130), the first process is the first average slip amount calculation step (S131). In the first average slip amount calculation step S131 , the average slip amount in an open state of the damper clutch is detected.

The first average slip amount calculation step S131 according to the present embodiment refers to the first section T1 (left side) of FIG. 3 . First, the section T0 of FIG. 3 is a section representing the minimum condition maintenance time, and is a section in which the control logic prevents repeated entry or release of an instantaneous condition. The subsequent T1 section is a section in which the average slip amount is calculated in an open state of the damper clutch.

At this time, the slip amount can be calculated from the engine rotation speed (Ne, rotation speed per minute) and the transmission input shaft speed (Nt, rotation speed per minute), and from the engine rotation speed (Ne) to the transmission input shaft speed (Nt) The slip amount can be calculated by subtracting

After the first average slip amount calculation step S131 is performed, a basic preload application step S132 of applying a basic preload to the damper clutch is performed. In this case, as already described above, a preferred basic preload value may be selected based on the engine rotation speed value and the oil temperature value using the basic preload selection map shown in FIG. 4 .

The basic preload application step ( S132 ) according to the present embodiment means a section T2 and a section T3 of FIG. 3 . The damper duty increases as much as the basic preload is applied to the damper clutch, and the hydraulic pressure is gradually increased during the T2 section (applying a slope) and then stabilized during the T3 section.

Thereafter, a second average slip amount calculation step ( S133 ) of detecting the average slip amount in a state in which the basic prediction is applied to the damper clutch is performed.

The second average slip amount calculation step S133 according to the present embodiment means the second section T1 (right side) of FIG. 3 . In the second section T1, the average amount of slip is detected while the basic preload is applied to the damper clutch.

In addition, as the last process of the preload learning step (S130), the preload correction value calculation for selecting the preload correction value by calculating the difference between the value obtained in the first average slip amount calculation step and the value obtained in the second average slip amount calculation step Step S134 is performed.

The above-mentioned preload correction value is preferably selected from the preload correction value selection map in which the oil temperature value is set as the X-axis and the difference value is set as the Y-axis, as shown in FIG. 5 .

For example, when the oil temperature value is 110 degrees Celsius and the slip amount difference value is 200 rpm, +5% may be selected as the preload correction value.

Finally, in the target preload determination step ( S140 ), the target preload is determined by adding the preset basic preload and the preload correction value, and then applied to the damper clutch. At this time, the sum of the basic preload and the preload correction value means that the basic preload value (eg, 60%) applied through the basic preload application step (S132) is added to the preload correction value selected through the preload correction value calculation step (S134) (eg For example, +5%) is added to finally derive a final preload value of 65% (60% + 5%). The derived final preload value is applied to the damper clutch to control the driving of the damper clutch.

As mentioned above, in the case of the damper clutch according to the prior art, when transitioning from the open state to the lock-up state, the hydraulic pressure must be applied from 0 to the target hydraulic pressure for lock-up. Therefore, there was a problem that the entry responsiveness was lowered.

On the other hand, according to the preload control method (S100) for improving the damper clutch lockup entry responsiveness of the present invention, the preload logic entry condition determination step (S110) for performing a specific process, the preload learning entry condition determination step (S120), the preload learning By including the step (S130) and the target preload determination step (S140), the damper clutch lockup including a configuration capable of improving the entry responsiveness so that the open damper clutch can be quickly entered into the lock-up state. It is possible to provide a preload control method for improving ingress response. In addition, the first average slip amount calculation step (S131), the basic preload application step (S132), the second average slip amount calculation step (S133) and the preload correction value calculation step (S134) for performing a specific process, the preload learning step (S134) By performing S130), it is possible to derive the optimal preload required for the damper clutch, thereby maximizing the improvement of the damper clutch lockup entry response.

In the above detailed description of the present invention, only specific embodiments thereof have been described. However, it is to be understood that the present invention is not limited to the particular form recited in the detailed description, but rather, it is to be understood to cover all modifications and equivalents and substitutions falling within the spirit and scope of the present invention as defined by the appended claims. should be

100: shift control unit (TCU)
110: preload logic entry condition determination logic
120: preload learning entry condition determination logic
130: preload learning logic
140: target preload determination logic
S100: Preload control method to improve damper clutch lockup response response
S110: Preload logic entry condition determination step
S120: Preload learning entry condition determination step
S130: preload learning step (S130)
S131: first average slip amount calculation step
S132: Basic preload application step
S133: second average slip amount calculation step
S134: Preload correction value calculation step
S140: target preload determination step

Claims (12)

As a preload control method for improving the lock-up entry response of a damper clutch,
When a request signal for transition to the lock-up state of the damper clutch is received while the damper clutch is open, the preload learning entry condition determination step when a preset criterion is satisfied based on the vehicle state information Preload logic entry condition determination step (S110) to perform (S120);
a preload learning entry condition determination step (S120) of performing a preload learning step (S130) when a preset criterion is satisfied based on the vehicle state information;
Preload learning step of calculating a preload correction value in the current state of the vehicle (S130); and
After determining the target preload by summing the preset basic preload and the preload correction value, the target preload determining step (S140) applied to the damper clutch; includes;
The preload learning step (S130) is,
a first average slip amount calculation step of detecting an average slip amount in a state in which the damper clutch is open (S131);
a basic preload application step of applying a basic preload to the damper clutch (S132);
a second average slip amount calculation step of detecting an average slip amount in a state in which a basic prediction is applied to the damper clutch (S133); and
a preload correction value calculation step of selecting a preload correction value by calculating a difference value between the value obtained in the first average slip amount calculation step and the value obtained in the second average slip amount calculation step (S134);
A preload control method for improving the damper clutch lockup entry responsiveness, comprising:
According to claim 1,
In the preload logic entry condition determination step (S110),
A preload control method for improving responsiveness to entering into a damper clutch lockup, characterized in that the preload is not applied to the damper clutch when a preset criterion is not satisfied.
According to claim 1,
In the preload learning entry condition determination step (S120),
A preload control method for improving responsiveness to entering into a damper clutch lockup, characterized in that when a preset standard is not satisfied, a preset basic preload is applied to the damper clutch.
According to claim 1,
The basic preload is selected from a basic preload selection map in which the engine speed value is set as the X-axis and the oil temperature value is set as the Y-axis.
According to claim 1,
The criteria preset in the preload logic entry condition determination step (S110) and the preload learning entry condition determination step (S120) are,
Whether the preload logic activation variable is activated, whether the damper clutch is in the open state, whether the shift gear lever position is in the drive (D) state, the neutral control state (Static, lever operation, neutral control/ISG) Whether recognition, comparison result between engine speed and preset reference value, comparison result between average engine speed and preset reference value, comparison result between turbine speed and preset reference value, and comparison result between output speed and preset reference value , at least one selected from the group consisting of a comparison result between oil temperature and a preset reference value.
6. The method of claim 5,
The condition for performing the preload learning entry condition determination step (S120) in the preload logic entry condition determination step (S110) is,
The preload logic activation variable must be ON, the damper clutch must be open, the shift gear lever position must be in the drive (D) state, and the neutral control state (Static, lever operation, neutral control/ISG) is not Damper, characterized in that at least one selected from the group consisting of, the engine speed exceeding the preset reference value, the turbine speed being the preset reference value or more, the output speed being the preset reference value or more, and the oil temperature being the preset reference value or more A preload control method for improving the clutch lockup entry responsiveness.
7. The method of claim 6,
In the preset standard, when the vehicle is stopped,
A preload control method for improving the responsiveness of entering a damper clutch lockup, characterized in that the conditions are changed such that the turbine speed is the same as the preset reference value and the output speed is the same as the preset reference value.
7. The method of claim 6,
A preload control method for improving responsiveness of entering into a damper clutch lockup, characterized in that the preload is not applied to the damper clutch when the preset criterion is not satisfied.
6. The method of claim 5,
The condition for performing the preload learning step (S130) in the preload learning entry condition determination step (S120) is,
The preload logic activation variable must be ON, the damper clutch must be open, the shift gear lever position must be in the drive (D) state, and the neutral control state (Static, lever operation, neutral control/ISG) is not Damper clutch lockup, characterized in that at least one selected from the group consisting of, the engine speed being less than the preset reference value, the turbine speed being less than the preset reference value, the output speed being less than the preset reference value, and the oil temperature being less than the preset reference value Preload control method to improve ingress response.
10. The method of claim 9,
A preload control method for improving responsiveness of entering a damper clutch lockup, characterized in that when the preset criterion is not satisfied, a preset basic preload is applied to the damper clutch.
delete According to claim 1,
The preload correction value is selected from a preload correction value selection map in which the oil temperature value is set as the X-axis and the difference value is set as the Y-axis.

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