KR102347648B1 - A method for controlling hybrid vehicle when engine-clutch release fail and an apparatus the same - Google Patents

Abstract

The present invention relates to a control method and a control apparatus when an engine-clutch release failure of a hybrid vehicle occurs. Engine-clutch release failure control method of a hybrid vehicle according to the present invention includes the steps of releasing the engine 700 and the clutch 800, and attempting to enter the EV mode driven by the motor 600 (S100); determining whether the engine 700 and the clutch 800 are released (S200); a first warning step (S300) of warning the driver that the engine 700 and the clutch 800 are not released when the engine 700 and the clutch 800 are not released; attempting to enter the HEV mode driven by the engine 700 and the motor 600 while the engine 700 and the clutch 800 are engaged (S400); determining whether driving in the HEV mode is possible (S500); when driving in the HEV mode is possible, determining whether the current vehicle speed is equal to or less than a preset reference speed (S600); a second warning step of requesting the driver to stop when the current vehicle speed is less than or equal to a preset reference speed (S700); and retrying to release the engine 700 and the clutch 800 after stopping (S800). According to the present invention, even in a situation in which the clutch is not released due to burning of the clutch, etc., the hybrid vehicle can be controlled to be driven as much as possible, thereby preventing the hybrid vehicle from being towed.

Description

A METHOD FOR CONTROLLING HYBRID VEHICLE WHEN ENGINE-CLUTCH RELEASE FAIL AND AN APPARATUS THE SAME

The present invention relates to a control method and a control apparatus for a defective engine-clutch release of a hybrid vehicle, and more particularly, to control the hybrid vehicle to be driven as much as possible even in a situation in which the clutch is not released due to BURNING of the clutch. The present invention relates to a control method and a control device when an engine-clutch release of a hybrid vehicle is defective.

A hybrid vehicle is a kind of eco-friendly vehicle, and it can configure various power transmission structures using the engine and the driving motor as power sources. It includes a driving mode such as a driving HEV mode.

When the clutch disposed between the engine and the driving motor is engaged, the engine power is output together with the power of the driving motor, and an HEV mode in which driving is implemented is implemented. In addition, when the clutch is released, the engine power is cut off to implement the EV mode in which driving is performed only with the power of the driving motor.

Although the release of the clutch is required in the EV mode as described above, a situation in which the clutch is not released may occur due to BURNING of the clutch. In this case, conventionally, it was not possible to enter the EV mode, and the vehicle had to drive only in the HEV mode. However, in HEV mode, driving is possible at medium and high speeds, but the vehicle cannot be driven at low speed (about 10 km/h or less), which is an unused area of the engine.

Public Utility Model Publication No. 20-1998-0017197 (10 Sep. 1998)

The present invention has been devised to solve the above problems, and an object of the present invention is to forcibly slip the burnt clutch to release the clutch and enter the EV mode. and to provide a control device.

Engine-clutch release failure control method of a hybrid vehicle according to the present invention includes the steps of releasing the engine 700 and the clutch 800, and attempting to enter the EV mode driven by the motor 600 (S100); determining whether the engine 700 and the clutch 800 are released (S200); a first warning step (S300) of warning the driver that the engine 700 and the clutch 800 are not released when the engine 700 and the clutch 800 are not released; attempting to enter the HEV mode driven by the engine 700 and the motor 600 while the engine 700 and the clutch 800 are engaged (S400); determining whether driving in the HEV mode is possible (S500); determining whether a current vehicle speed is equal to or less than a preset reference speed when driving in the HEV mode (S600); a second warning step of requesting the driver to stop when the current vehicle speed is less than or equal to the preset reference speed (S700); and retrying to release the engine 700 and the clutch 800 after stopping ( S800 ).

The engine-clutch release failure control method of the hybrid vehicle may include a step of re-determining whether the engine 700 and the clutch 800 are released (S900).

In the case of engine-clutch release failure of the hybrid vehicle, the control method includes a third warning step (S1000) of requesting the driver to visit a repair shop when the engine 700 and the clutch 800 are released. do.

In the case of engine-clutch release failure of the hybrid vehicle, in the step of determining whether the current vehicle speed is below a preset reference speed (S600), if the current vehicle speed exceeds the preset reference speed, the third warning step ( S1000) is characterized in that it is performed.

In the case of engine-clutch release failure of the hybrid vehicle, the control method includes a fourth warning step (S1100) of inducing a driver to request a towing when the engine 700 and the clutch 800 are not released; characterized in that

In the case of engine-clutch release failure of the hybrid vehicle, in the step of determining whether driving in the HEV mode is possible ( S500 ), when driving in the HEV mode is not possible, the engine 700 and the clutch are stopped after the vehicle is stopped It is characterized in that the step (S800) of retrying the release of (800) is performed.

The step of retrying to release the engine 700 and the clutch 800 after the vehicle is stopped (S800) includes the steps of shifting the shift stage of the vehicle to the stop stage (P stage) (S810); and forcibly slipping the engine and the clutch (S820).

In the step of forcibly slipping the engine 700 and the clutch 800 ( S820 ), the motor 600 is driven at a preset speed while the engine 700 is not driven, and the engine 700 . And it is characterized in that it generates a difference in the rotation speed of the motor (600).

The step (S820) of forcibly slipping the engine 700 and the clutch 800 is performed by driving the motor 600 at a preset speed while the engine 700 is in an idling state. It is characterized in that the difference in rotation speed of the motor 600 is generated.

The step (S820) of forcibly slipping the engine 700 and the clutch 800 is characterized in that the engagement pressure between the engine 700 and the clutch 800 is controlled to a minimum pressure.

In the storage medium according to the present invention, the control method when the clutch release is defective is stored in the engine of the hybrid vehicle.

An engine-clutch release failure control apparatus of a hybrid vehicle according to the present invention includes the storage medium 100; a sensing unit 200 including a release sensing unit 210 and a vehicle speed sensing unit 220 of the engine 700 and the clutch 800; a warning unit 300 for warning the driver of the state of the vehicle; And by using the information of the sensing unit 200, the engine 700 of the hybrid vehicle stored in the storage medium 100 - according to the control method when the clutch 800 is unsuccessfully released, through the warning unit 300 and a control unit 400 for recognizing the state of the vehicle to the driver.

The engine-clutch release failure control device of the hybrid vehicle includes a transmission 500 controlled by the controller 400, a motor 600, the engine 700, and the clutch 800 .

As described above, according to the present invention, even in a situation in which the clutch is not released due to burning of the clutch, etc., it is possible to prevent the hybrid vehicle from being towed by controlling the hybrid vehicle to be driven as much as possible.

1 is a flowchart of a control method when an engine-clutch release failure occurs in a hybrid vehicle according to the present invention;
2 is a block diagram of a control device in case of a defective clutch release - an engine of a hybrid vehicle according to the present invention.

The principle that terms or words used in the present specification and claims should not be limited to their ordinary or dictionary meanings, and the inventor may appropriately define the concept of a term to best describe his/her invention It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be water and variations. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart of a method for controlling an engine-clutch release failure of a hybrid vehicle according to the present invention. Referring to FIG. 1 , the engine-clutch release failure control method of the hybrid vehicle according to the present invention releases the engine 700 and the clutch 800 , and attempts to enter the EV mode driven by the motor 600 . to (S100); determining whether the engine 700 and the clutch 800 are released (S200); a first warning step (S300) of warning the driver that the engine 700 and the clutch 800 are not released when the engine 700 and the clutch 800 are not released; attempting to enter the HEV mode driven by the engine 700 and the motor 600 while the engine 700 and the clutch 800 are engaged (S400); determining whether driving in the HEV mode is possible (S500); when driving in the HEV mode is possible, determining whether the current vehicle speed is equal to or less than a preset reference speed (S600); a second warning step of requesting the driver to stop when the current vehicle speed is less than or equal to a preset reference speed (S700); and retrying to release the engine 700 and the clutch 800 after stopping (S800).

In the step S100 of releasing the engine 700 and the clutch 800 , and attempting to enter the EV mode driven by the motor 600 , the actuator mounted on the clutch 800 is operated to operate the engine 700 and the clutch. (800) is a step to try to release.

In the step (S200) of determining whether the engine 700 and the clutch 800 are released, the engine 700 and the clutch 800 are released by the step (S100) of attempting to enter the EV mode. It is a step to determine whether or not

In addition, the first warning step (S300) is a step of warning the driver that the engine 700 and the clutch 800 are not released when the engine 700 and the clutch 800 are not released. to be.

That is, when the engine 700 and the clutch 800 are released by attempting to enter the EV mode (S100), and the engine 700 and the clutch 800 are not released, the driver is informed of the above situation warns (S200, S300). For example, a warning light indicating that the engine 700 and the clutch 800 are not released may be turned on on the instrument panel, but the present invention is not limited thereto. means may be included.

In the step (S400) of attempting to enter the HEV mode, the engine 700 is driven by the engine 700 and the motor 600 while the engine 700 and the clutch 800 are engaged. and driving the driving motor 600 .

In the step S500 of determining whether driving in the HEV mode is possible, it is determined whether driving in the HEV mode is possible by the step S400 of attempting to enter the HEV mode.

That is, since the current state of the vehicle after the first warning step (S300) is the state in which the engine 700 and the clutch 800 are engaged, the engine power is output together with the power of the driving motor and the vehicle is driven to the HEV mode. Enter and try to drive (S400, S500). This is to prevent the hybrid vehicle from being towed by controlling the hybrid vehicle to be driven as much as possible.

If driving in the HEV mode is not possible in the step (S500) of determining whether driving in the HEV mode is possible, retrying to release the engine 700 and the clutch 800 after stopping, which will be described later (S800) carry out That is, since the vehicle has already been stopped in a driving disabled state, the engine 700 and the clutch 800 are immediately attempted to slip.

In addition, when driving in the HEV mode is possible, performing the step S600 of determining whether the current vehicle speed is less than or equal to a preset reference speed, as described above, in the HEV mode, driving is possible at medium and high speeds, but the engine is not used. This is because the vehicle cannot be driven at a low speed (about 10 km/h or less). The preset reference speed may be set to 10 km/h, but is not necessarily limited thereto, and may be set differently according to a designer's intention.

The second warning step S700 is a step of requesting the driver to stop when the current vehicle speed is less than or equal to a preset reference speed. Also, in the retrying step ( S800 ), the engine 700 and the clutch 800 are released again after the vehicle is stopped.

That is, when the current vehicle speed is less than or equal to the preset reference speed in the determining step ( S600 ), the driver requests a stop ( S700 ). This is because, as described above, in the HEV mode, driving is possible at medium and high speeds, but driving of the vehicle is impossible at low speeds (about 10 km/h or less), which is an engine unused region. For example, a warning light for requesting a stop may be turned on on an instrument panel or the like, but the present invention is not limited thereto, and other means for recognizing that the vehicle needs to be stopped may be included.

Thereafter, when the hybrid vehicle is stopped, it attempts to release the engine 700 and the clutch 800 again (S800). In this case, the step S800 includes shifting the shift stage of the vehicle to the stop stage (P stage) (S810) and forcibly slipping the engine 700 and the clutch 800 (S820).

That is, by shifting the shift stage of the stopped vehicle to the stop stage (P stage) ( S810 ), even if the driving motor 600 is rotated at a high speed as will be described later, the vehicle is prevented from starting abruptly.

Thereafter, the engine 700 and the clutch 800 are forcibly slipped to forcibly release the seized clutch 800 ( S820 ). The clutch 800 may be damaged by the forced slip, but since the clutch 800 is already damaged due to seizure, it is in an abnormal state.

The step of forcibly slipping the engine and the clutch (S820) is performed by i) first controlling the engagement pressure between the engine 700 and the clutch 800 to a minimum pressure, and ii) when the engine 700 is not driven. In a stopped state or in an idle state of the engine 700, the driving motor 600 is driven at a preset speed.

At this time, controlling the engagement pressure between the engine 700 and the clutch 800 to the lowest pressure operates an actuator mounted on the clutch 700 to apply the engagement pressure to the engine 700 and the clutch 800 . Controlling it so it doesn't happen.

In addition, when the driving motor 600 is driven at a preset speed in a stopped state in which the engine 700 is not driven or the engine 700 is in an idle state, one end of the clutch 800 connected to the driving motor 600 is ) and the relative speed of the engine 700 fastened to the other end of the clutch 800 (separation) is significantly different. Accordingly, the seizure portion is broken so that the clutch 800 is forced to slip with the engine 700 . As a result, it is possible to enter the EV mode initially intended to enter, and it is possible to drive the vehicle even in a stopped state.

That is, in the previous step (S100) of attempting to enter the EV mode, the engine 700 and the clutch 800 were released by simply operating the actuator mounted on the clutch 800, but the engine 700 and the clutch In the step (S820) of forcibly slipping the 800, the difference between the relative speeds of the clutch 800 and the engine 700 is increased to break the seized portion of the clutch 800.

In the re-determining step (S900), it is determined again whether the engine 700 and the clutch 800 are released. Also, in the third warning step ( S1000 ), when the engine 700 and the clutch 800 are released, the driver is requested to visit the repair shop.

That is, it is determined whether the engine 700 and the clutch 800 are released by the forced slip of the engine 700 and the clutch 800 ( S900 ), and the driver may overlook damage to the clutch 800 . , to separately warn the driver (S1000).

That is, as described above, the clutch 800 may be damaged by the forced slip. However, since the engine 700 and the clutch 800 are released by the forced slip, the vehicle enters the EV mode and can drive even after stopping. Accordingly, since the driver may overlook damage to the clutch 800 , a separate warning is issued to the driver to induce a visit to the repair shop.

In the third warning step (S1000), for example, a warning lamp for requesting a repair shop visit may be turned on on the instrument panel, etc. can

In addition, in the step of determining whether the current vehicle speed is equal to or less than the preset reference speed ( S600 ), even if the current vehicle speed exceeds the preset reference speed, the third warning step ( S1000 ) is performed. In this case, since the vehicle does not enter the low-speed (about 10 km/h or less) region, which is an engine-free region, the vehicle is in a state capable of driving in the HEV mode. Therefore, in order to prevent a separate towing request, the driver is warned to induce a visit to the repair shop.

The fourth warning step ( S1100 ) is a step of inducing the driver to make a traction request when the engine 700 and the clutch 800 are not released even by the forced slip. That is, since the vehicle is stopped in the HEV mode and the engine 700 and the clutch 800 are not released, the vehicle cannot enter the EV mode. Therefore, since the vehicle is in a state of being unable to drive, it is to induce the driver to make a towing request by recognizing the state of the vehicle.

2 is a block diagram of a control device when an engine-clutch release failure occurs in a hybrid vehicle according to the present invention. Referring to FIG. 2 , the engine-clutch release failure control apparatus of the hybrid vehicle according to the present invention includes a storage medium 100 , a detection unit 200 , a warning unit 300 , and a control unit 400 .

The storage medium 100 stores the control method when the engine-clutch release of the hybrid vehicle is defective.

The sensing unit 200 includes an engine 700 and a release sensing unit 210 of the clutch 800 and a vehicle speed sensing unit 220 .

The warning unit 300 warns the driver of the state of the vehicle. That is, it warns that the engine 700 and the clutch 800 are not released, requests the driver to stop, requests the driver to visit the repair shop, and induces the driver to request towing.

The control unit 400 uses the information of the sensing unit 200 to determine the warning unit ( 300) to recognize the state of the vehicle to the driver.

The control unit 400 controls the transmission 500 , the motor 600 , the engine 700 , and the clutch 800 , and when the vehicle cannot enter the EV mode, the engine 700 and the clutch (800) can be forced to slip.

That is, the control unit 400 serves to prevent the traction of the hybrid vehicle by controlling the hybrid vehicle to be driven as much as possible even in a situation in which the clutch is not released due to BURNING of the clutch.

The above-described embodiment is only a preferred embodiment that allows a person of ordinary skill in the art (hereinafter referred to as 'person of ordinary skill in the art') to easily practice the present invention, and the above-described embodiment and accompanying drawings Since it is not limited to, the scope of the present invention is not limited thereto. Accordingly, it will be apparent to those skilled in the art that various substitutions, modifications, and changes are possible within the scope of the present invention without departing from the technical spirit of the present invention, and it is apparent that parts easily changeable by those skilled in the art are also included in the scope of the present invention. .

100 storage medium
200 sensor
210 engine-clutch release detection unit
220 vehicle speed sensor
300 warning
400 control
500 gearbox
600 motor
700 engine
800 clutch

Claims (14)

releasing the engine 700 and the clutch 800, and attempting to enter the EV mode driven by the motor 600 (S100);
determining whether the engine 700 and the clutch 800 are released (S200);
a first warning step (S300) of warning the driver that the engine 700 and the clutch 800 are not released when the engine 700 and the clutch 800 are not released;
attempting to enter the HEV mode driven by the engine 700 and the motor 600 while the engine 700 and the clutch 800 are engaged (S400);
determining whether driving in the HEV mode is possible (S500);
when driving in the HEV mode is possible, determining whether the current vehicle speed is equal to or less than a preset reference speed (S600);
a second warning step of requesting the driver to stop when the current vehicle speed is less than or equal to a preset reference speed (S700); and
retrying to release the engine 700 and the clutch 800 after stopping (S800);
An engine of a hybrid vehicle comprising: a control method when the clutch release is defective. The method of claim 1,
determining whether the engine 700 and the clutch 800 are released again (S900);
Engine of a hybrid vehicle, comprising: a control method when the clutch release is defective. 3. The method of claim 2,
a third warning step (S1000) of requesting a driver to visit a repair shop when the engine 700 and the clutch 800 are released;
Engine of a hybrid vehicle, comprising: a control method when the clutch release is defective. 3. The method of claim 2,
In the step (S600) of determining whether the current vehicle speed is less than or equal to a preset reference speed, if the current vehicle speed exceeds the preset reference speed, the third warning step (S1000) is performed. - Control method in case of clutch release failure. 3. The method of claim 2,
a fourth warning step (S1100) of inducing a driver to make a traction request when the engine 700 and the clutch 800 are not released;
Engine of a hybrid vehicle, comprising: a control method when the clutch release is defective. The method of claim 1,
In the step of determining whether driving in the HEV mode is possible (S500), if driving in the HEV mode is not possible, retrying to release the engine 700 and the clutch 800 after stopping the vehicle (S800) An engine of a hybrid vehicle, characterized in that performing: a control method when the clutch release is defective. The method of claim 1,
The step of retrying to release the engine 700 and the clutch 800 after the vehicle is stopped (S800) includes the steps of shifting the shift stage of the vehicle to the stop stage (P stage) (S810);
Engine of a hybrid vehicle, comprising: a control method when the clutch release is defective. 8. The method of claim 7,
The step of retrying to release the engine 700 and the clutch 800 after the vehicle is stopped (S800) includes the steps of forcibly slipping the engine and the clutch 800 (S820);
Engine of a hybrid vehicle, comprising: a control method when the clutch release is defective. 9. The method of claim 8,
In the step of forcibly slipping the engine 700 and the clutch 800 ( S820 ), the motor 600 is driven at a preset speed while the engine 700 is not driven, and the engine 700 . and a difference in rotational speed of the motor (600). 9. The method of claim 8,
The step (S820) of forcibly slipping the engine 700 and the clutch 800 is performed by driving the motor 600 at a preset speed while the engine 700 is in an idling state. Engine of a hybrid vehicle, characterized in that generating a difference in rotational speed of the motor (600) - A control method when the clutch release is defective. 9. The method of claim 8,
In the step of forcibly slipping the engine 700 and the clutch 800 ( S820 ), the engagement pressure between the engine 700 and the clutch 800 is controlled to a minimum pressure. Control method in case of release failure. [12] The storage medium storing the control method in case of a defective clutch release - the engine of the hybrid vehicle according to any one of claims 1 to 11. The storage medium 100 of claim 12;
a sensing unit 200 including a release sensing unit 210 and a vehicle speed sensing unit 220 of the engine 700 and the clutch 800;
a warning unit 300 for warning the driver of the state of the vehicle; and
By using the information of the sensing unit 200, the driver through the warning unit 300 according to the control method when the engine 700-clutch 800 of the hybrid vehicle stored in the storage medium 100 fails to release. a control unit 400 for recognizing the state of the vehicle;
An engine of a hybrid vehicle comprising: a control device when the clutch release is defective. 14. The method of claim 13,
Engine of a hybrid vehicle, characterized in that it includes a transmission (500), a motor (600), the engine (700), and the clutch (800) controlled by the control unit (400) - a control device when the clutch release is defective.

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