KR102573753B1 - Method for controlling damper clutch - Google Patents

Abstract

The present invention relates to a damper clutch control method for controlling the operation of a damper clutch according to driving conditions of a vehicle. and a damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the radius of curvature and the speed of the vehicle. In this way, it is possible to obtain an effect of securing durability and driving stability of the damper clutch by preventing an excessive occurrence of an on/off operation of the damper clutch while the vehicle passes through a curved section.

Description

Damper clutch control method {METHOD FOR CONTROLLING DAMPER CLUTCH}

The present invention relates to a damper clutch control method, and more particularly, to a damper clutch control method for blocking damper clutch control under certain conditions when there is a curved section in front of a vehicle.

In general, an automatic transmission vehicle is provided with an engine control unit (ECU) and a transmission control unit (TCU) that control the engine and transmission, respectively, and control the engine and transmission in the best state to suit the characteristics of the engine and transmission, respectively.

In such an automatic transmission vehicle, the transmission control unit (TCU) controls the automatic transmission according to various shifting conditions based on necessary parameters such as the driving speed of the vehicle, the accelerator pedal position sensor (APS), and the opening rate of the throttle valve, thereby shifting gears. (e.g., upshift, downshift) is performed automatically. Such gear shifting is currently using an automatic transmission in most vehicles because of the driver's convenience.

However, since an automatic transmission employs a torque converter that transmits power by rotating a turbine using oil as a medium, 100% power is not transmitted like a normal friction clutch. In order to compensate for this, a damper clutch capable of mechanically directly connecting a pump shaft and a turbine shaft of the torque converter is used in the torque converter.

The damper clutch is turned on under the control of the transmission control unit (TCU) when the driving speed of the vehicle and the opening rate of the throttle valve satisfy the operating conditions based on the damper clutch control map, thereby reducing the pump shaft and turbine By directly connecting the shaft, it is possible to improve fuel efficiency and improve power efficiency due to power loss caused by a rotational difference between the pump shaft and the turbine shaft.

However, the existing damper clutch control does not include control using shape recognition of the road ahead of the vehicle. In other words, since the damper clutch is controlled by the current driving state and the driver's will, predictive control according to the road ahead cannot be performed, and the damper clutch is turned off-on-off in a short time according to the road condition. (off) may occur.

In this way, when the damper clutch operates off-on-off in a short time, frequent collisions of the damper clutch cause a problem in that durability deteriorates, and driving stability and ride comfort deteriorate. there is a problem.

Korean Patent Registration No. 10-1686798 (2016.12.09)

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a damper clutch control method that blocks the damper clutch control under certain conditions when there is a curved section in front of the vehicle.

In order to achieve the above object, a damper clutch control method according to a preferred embodiment of the present invention relates to a damper clutch control method for controlling the operation of the damper clutch according to driving conditions of a vehicle.

The damper clutch control method includes a curved section determining step of determining whether there is a curved section in a road ahead; and a damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the radius of curvature of the curved section and the speed of the vehicle.

Here, the damper clutch control blocking determining step may include a vehicle speed determining step of determining a vehicle speed at the time of entering the curved section; a radius of curvature calculation step of calculating a radius of curvature of the curved section; and a damper clutch control blocking step of blocking the damper clutch control when the determined vehicle speed and the calculated radius of curvature are equal to or greater than the preset vehicle speed and curvature radius.

For example, the damper clutch control blocking step may be performed to block the damper clutch control when the calculated speed of the vehicle is 70 km/h or more and the calculated radius of curvature is 160 m or more.

As another example, the damper clutch control method may include a curved section determining step of determining whether there is a curved section in a front road; and a damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the radius of curvature of the curved section and the gear stage of the transmission.

Here, the damper clutch control cut-off determination step may include a gear stage determination step of determining a gear stage of the transmission at the time of entering the curved section; a radius of curvature calculation step of calculating a radius of curvature of the curved section; and a damper clutch control blocking step of blocking the damper clutch control when the determined gear stage and the calculated radius of curvature are equal to or greater than a preset gear stage and radius of curvature.

For example, in the damper clutch control blocking step, the damper clutch control may be blocked when the determined gear is 5 or more and the calculated radius of curvature is 220 m or more.

Alternatively, the damper clutch control blocking step may be configured to block the damper clutch control when the determined gear range is 1st to 4th gear and the calculated radius of curvature is 160 m or more.

The step of detecting a curved section may be configured to determine a curved section of a road ahead by receiving road shape information from a navigation system.

And, a distance determination step of determining whether the distance between the entry point of the curved section and the current vehicle is within a target distance; may be further included.

In this case, when it is determined that the distance is within the target distance in the distance determination step, the damper clutch control blocking determination step may be entered.

Here, the distance determination step may be performed to set the target distance in consideration of the current vehicle speed.

For example, in the distance determination step, a distance that can reach the entry point of the curved section within 4 to 6 seconds in consideration of the current vehicle speed may be set as the target distance.

In addition, a passing time calculation step of calculating the passing time of the curved section in consideration of the current vehicle speed; may be further included.

At this time, if the calculated passage time is less than the target passage time, the damper clutch control blocking step may be entered.

For example, the target passage time may be set to 3 to 5 seconds.

Furthermore, when the vehicle leaves the curved section in a state in which the damper clutch control is blocked, the damper clutch control may be disengaged.

According to the damper clutch control method according to the present invention, the durability and driving stability of the damper clutch can be secured by preventing excessive on and off operations of the damper clutch while the vehicle passes through a curved section. effect can be obtained.

1 is a view schematically showing driving conditions of a vehicle to which a damper clutch control method according to an embodiment of the present invention is applied;
2 is a flowchart schematically showing a damper clutch control method according to an embodiment of the present invention;
3 is a flowchart schematically showing a control condition added to a damper clutch control method according to an embodiment of the present invention;
4 is a flowchart schematically showing a damper clutch control method according to another embodiment of the present invention;
5 is a flowchart schematically showing a control condition added to a damper clutch control method according to another embodiment of the present invention.

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

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be construed as including all changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions may include plural expressions unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, interpreted in an ideal or excessively formal meaning. It may not be.

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

1 is a view schematically showing driving conditions of a vehicle to which a damper clutch control method according to an embodiment of the present invention is applied, FIG. 2 is a flowchart schematically showing the damper clutch control method, and FIG. 3 is the damper It is a flowchart schematically shown by adding control conditions to the clutch control method.

1 to 3, a damper clutch control method according to an embodiment of the present invention relates to a damper clutch control method for controlling the operation of the damper clutch according to driving conditions of the vehicle, Depending on the situation of (20), the damper clutch control may be blocked so that the damper clutch control for controlling the damper clutch on/off is not performed.

More specifically, if there is a curved section 22 in front of the lane 20 on which the vehicle 10 travels, the damper clutch control is blocked in consideration of the driving conditions of the vehicle 10 and the conditions of the curved section 22 It can be done.

That is, as the driving conditions of the vehicle 10 change while passing through the curved section 22, the damper clutch may be excessively turned on and off in a short time. Therefore, in the present invention, while passing through the curved section 22 under certain conditions, it is possible to block the damper clutch control so that driving stability is ensured and durability of the damper clutch is also secured.

To this end, the damper clutch control method according to the embodiment of the present invention includes the step of determining whether there is a curved section 22 in the road ahead 20 (S110), and the curvature radius of the entering curved road 20 ( R) and a damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the speed of the vehicle 10 may be included.

Here, in the step of determining the curved section (S110), shape information of the road currently being driven is received from the navigation provided in the vehicle 10, and the curved section 22 of the road ahead is determined from the received shape information of the road. can

In addition, the damper clutch control blocking determination step includes a vehicle speed determining step (S130) of determining the speed of the vehicle 10 at the time of entering the curved section 22, and a curvature radius R of the curved section 22 If the radius of curvature calculation step (S140) of calculating, and the speed of the vehicle 10 and the calculated radius of curvature (R) are equal to or greater than the preset vehicle speed value and radius of curvature (Yes in S150), the damper clutch It may be made including the damper clutch control blocking step (S150) of blocking the control.

That is, if the speed of the vehicle 10 and the radius of curvature R of the curved section 22 satisfy certain conditions, the damper clutch is controlled while the vehicle 10 passes through the curved section 22. Block the damper clutch control so that it does not perform.

For example, in the damper clutch control blocking step (S170), the damper clutch control may be blocked when the calculated speed of the vehicle 10 is 70 km/h or more and the calculated radius of curvature R is 160 m or more. .

For example, when the speed of the vehicle 10 entering the curved section 22 is 100 km/h or more and the curvature radius R of the curved section 22 is 220 m, the damper clutch control is blocked.

And, the damper clutch control method according to the embodiment of the present invention is a distance determination step of determining whether the distance 21 between the entry point 22a of the curved section 22 and the current vehicle 10 is within the target distance (S120) ) may be further included.

At this time, if the distance 21 between the entry point 22a of the curved section 22 and the current vehicle 10 is determined to be within the target distance (YES in S120) in the distance determining step (S120), the damper clutch control is cut off enter the judgment stage.

That is, there is a curved section 22 in the lane 20 ahead of the vehicle 10 (Yes in S110), and the vehicle 10 enters within the target distance from the entry point 22a of the curved section 22. If (Yes in S120), the speed of the vehicle at the time of entry into the curved section 22 and the radius of curvature of the curved section are calculated (S130, S140), and the determined vehicle speed is greater than the set vehicle speed and the calculated radius of curvature If the radius of curvature is greater than or equal to the set radius of curvature (YES in S150), the damper clutch control is blocked (S170).

Here, the distance determination step (S120) may be performed to set the target distance in consideration of the current vehicle speed.

For example, in the distance determining step (S120), a distance that can reach the entry point 22a of the curved section 22 within 4 to 6 seconds in consideration of the current vehicle speed may be calculated and set as the target distance. there is.

For example, if it is set to enter the entry point 22a of the curved section 22 within 5 seconds, and the speed of the currently running vehicle is 100 km/h, the target distance is about 139 m. That is, when the driving vehicle 10 enters within a distance of 139 m from the entry point 22a of the curved section 22, the subsequent steps are performed.

And, the damper clutch control method according to the embodiment of the present invention may further include a passing time calculation step (S160) of calculating the passing time of the curved section in consideration of the current vehicle speed.

At this time, if the passage time calculated in the passage time calculation step (S160) is less than the target passage time, the damper clutch control blocking step (S170) may be entered. Here, the target passage time may be set to 3 to 5 seconds.

For example, if the target passage time is set to 4 seconds, the distance of the curved section 22 is calculated from the data found in the curve section identification step (S110), and the distance of the curved section 22 and the When the speed of the vehicle identified in the vehicle speed determination step (S130) is calculated and it is calculated that the vehicle passes within the target passage time of 4 seconds or less, the damper clutch control blocking step (S170) may be entered.

And, the damper clutch control method according to the embodiment of the present invention may be made to release the damper clutch control blocking when it is determined that the vehicle has deviated from the curved section 22 . That is, the damper clutch may be controlled based on a previously set damper clutch control map when the curved section 22 is departed.

4 is a flowchart schematically showing a damper clutch control method according to another embodiment of the present invention, and FIG. 5 is a flowchart schematically showing a damper clutch control method according to another embodiment of the present invention by adding control conditions.

1, 4 and 5, the damper clutch control method according to another embodiment of the present invention is the damper clutch control method and damper clutch control according to the embodiment of the present invention described with reference to FIGS. 1 to 3 There are some differences in the blocking judgment step, and the rest of the steps are the same.

More specifically, the damper clutch control method according to another embodiment of the present invention includes the step of determining whether there is a curved section 22 in the road ahead 20 (S210), and the curvature of the curved section 22 entering A damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the radius R and the gear stage of the transmission may be included.

That is, the damper clutch control method according to another embodiment of the present invention is described with reference to FIGS. 1 to 3 in that it determines whether to block the damper clutch control in response to the gear stage of the transmission rather than the speed of the vehicle. There are some differences from the damper clutch control method according to the embodiment of the present invention.

More specifically, the damper clutch control blocking determination step includes a gear step determining step (S230) of determining the gear stage of the transmission at the time of entering the curved section 22, and the curvature radius (R) of the curved section 22 A curvature radius calculation step (S240) of calculating , and if the determined gear stage and the calculated radius of curvature R are equal to or greater than the preset gear stage and curvature radius value (YES in S250), the damper clutch control is shut off. It may be made including a blocking step (S270).

That is, if the gear stage of the vehicle 10 and the radius of curvature R of the curved section 22 satisfy certain conditions, the damper clutch is controlled while the vehicle 10 passes through the curved section 22. Block the damper clutch control so that it does not perform.

For example, in the damper clutch control blocking step (S270), the damper clutch control may be blocked when the determined gear is 5 or more and the calculated radius of curvature R is 220 m or more.

Alternatively, the damper clutch control blocking step (S270) may be configured to block the damper clutch control when the determined gear range is 1st to 4th gear and the calculated radius of curvature R is 160m or more.

Therefore, the damper clutch control blocking step (S270) is performed to block the damper clutch control when the radius of curvature R is 160 m or more when the gear stage is 1 to 4, and the gear stage is 5 or more and calculated When the curvature radius R is 220 m or more, the damper clutch control may be blocked.

In addition, the damper clutch control method according to another embodiment of the present invention also includes a distance determination step of determining whether the distance 21 between the entry point 22a of the curved section 22 and the current vehicle 10 is within the target distance ( S220) may be further included.

At this time, if the distance 21 between the entry point 22a of the curved section 22 and the current vehicle 10 is determined to be within the target distance (YES in S220) in the distance determining step (S220), the damper clutch control is cut off enter the judgment stage.

In addition, the damper clutch control method according to another embodiment of the present invention may further include a passing time calculating step (S260) of calculating the passing time of the curved section in consideration of the current vehicle speed.

At this time, if the passing time calculated in the passing time calculating step (S260) is less than the target passing time, the damper clutch control blocking step (S270) may be entered. Here, the target passage time may be set to 3 to 5 seconds.

In addition, when it is determined that the vehicle has deviated from the curved section 22 in a state in which the damper clutch control is blocked, the damper clutch control blocking may be released. That is, the damper clutch may be controlled based on a previously set damper clutch control map when the curved section 22 is departed.

In this way, the current driving speed of the vehicle, the distance to the curved section, the radius of curvature of the curved section, and the time data passing through the curved section are obtained, and if they satisfy certain conditions, the damper clutch is operated while the vehicle passes through the curved section. It is possible to secure durability of the damper clutch while securing driving stability by shutting off control.

Although the present invention has been described in detail through specific examples, this is for explaining the present invention in detail, the present invention is not limited thereto, and the present invention is within the technical spirit of the present invention. It is clear that modification or improvement is possible by the person.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific protection scope of the present invention will be clarified by the appended claims.

10: vehicle
20: Charo
22: curve section

Claims (14)

In the damper clutch control method for controlling the operation of the damper clutch according to the driving conditions of the vehicle,
A curve section identification step of determining whether there is a curved section in the road ahead; and
A damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the radius of curvature of the entering curved section and the speed of the vehicle; includes,
In the damper clutch control blocking determination step,
A vehicle speed determination step of determining the speed of the vehicle at the time of entering the curved section;
a radius of curvature calculation step of calculating a radius of curvature of the curved section; and
The damper clutch control blocking step of blocking the damper clutch control when the determined vehicle speed and the calculated radius of curvature are equal to or greater than the preset vehicle speed and radius of curvature;
Damper clutch control method comprising a.
delete According to claim 1,
The damper clutch control blocking step,
Damper clutch control method characterized in that the damper clutch control is blocked when the calculated speed of the vehicle is 70 km / h or more and the calculated radius of curvature is 160 m or more.
In the damper clutch control method for controlling the operation of the damper clutch according to the driving conditions of the vehicle,
A curve section identification step of determining whether there is a curved section in the road ahead; and
Including; a damper clutch control blocking determination step of determining whether to block the damper clutch control in response to the curvature radius of the curved section and the gear stage of the transmission,
In the damper clutch control blocking determination step,
a gear stage identification step of identifying a gear stage of the transmission at the time of entering the curved section;
a radius of curvature calculation step of calculating a radius of curvature of the curved section; and
a damper clutch control blocking step of blocking damper clutch control when the determined gear stage and the calculated radius of curvature are equal to or greater than a preset gear stage and radius of curvature;
Damper clutch control method comprising a.
delete According to claim 4,
The damper clutch control blocking step,
The damper clutch control method characterized in that the damper clutch control is blocked when the determined gear is 5 or more and the calculated radius of curvature is 220 m or more.
According to claim 4,
The damper clutch control blocking step,
The damper clutch control method characterized in that the damper clutch control is blocked when the determined gear stage is 1st to 4th gear and the calculated radius of curvature is 160 m or more.
According to claim 1 or 4,
The step of determining the curve section,
A damper clutch control method, characterized in that by receiving road shape information from a navigation system and identifying a curved section of a road ahead.
According to claim 1 or 4,
Further comprising a distance determination step of determining whether the distance between the entry point of the curved section and the current vehicle is within a target distance,
The damper clutch control method, characterized in that if it is determined within the target distance in the distance determining step, it enters the damper clutch control blocking determining step.
According to claim 9,
In the distance determination step,
Damper clutch control method characterized in that for setting the target distance in consideration of the current vehicle speed.
According to claim 9,
In the distance determination step,
Damper clutch control method, characterized in that for setting a distance that can reach the entry point of the curved section within 4 to 6 seconds as the target distance in consideration of the speed of the current vehicle.
According to claim 1 or 4,
Further comprising: a passing time calculation step of calculating a passing time of the curved section in consideration of the current vehicle speed;
The damper clutch control method, characterized in that entering the damper clutch control blocking step when the calculated passing time is less than the target passing time.
According to claim 12,
The target passing time is
Damper clutch control method, characterized in that 3 to 5 seconds.
According to claim 1 or 4,
Damper clutch control method characterized in that to release the damper clutch control blocking when the vehicle leaves the curved section in a state where the damper clutch control is blocked.