KR102396540B1 - Vehicle control apparatus and control method thereof - Google Patents

Abstract

A vehicle control apparatus and a control method thereof are disclosed. An apparatus for controlling a vehicle and a method for controlling the same according to an embodiment of the present invention include: an input unit for receiving a current brake fluid level value and a current hydraulic circuit pressure value detected by the sensing device; It is determined whether the input current brake fluid level value is in a first state out of a preset reference brake fluid level value range, and it is determined whether the input current hydraulic circuit pressure value is in a second state out of the preset reference hydraulic circuit pressure value range. judging unit; and a current brake fluid level value and a current hydraulic circuit pressure value are supplied, a determination command is transmitted to the determination unit, and a prohibition command is transmitted to the regenerative braking device to prohibit the regenerative braking of the regenerative braking device in the first state, and a second and a control unit that transmits a detection command to the detection device so that the detection device detects an oil leakage value of the current hydraulic circuit if the state is there.

Description

Vehicle control apparatus and control method thereof

The present invention relates to a vehicle control device and a control method thereof.

In general, since a conventional hybrid vehicle cannot generate a vacuum pressure required for braking like an engine vehicle during electric mode driving, it is braked by boosting the braking pressure arbitrarily.

In this case, the conventional hybrid vehicle performs cooperative control through regenerative braking for the purpose of charging an electric battery during braking control.

However, the conventional hybrid vehicle has a limitation in clearly and quickly determining the current failure state when brake fluid leakage occurs in the hydraulic circuit.

Accordingly, in recent years, research has been continuously conducted on an improved vehicle control apparatus capable of clearly and rapidly determining a current failure state and a control method thereof.

In addition, in recent years, research on an improved vehicle control device and a control method therefor that reduces anxiety about the current hydraulic circuit state while inducing the driver to drive with caution and enables the driver to quickly respond to the current hydraulic circuit state has been done

SUMMARY OF THE INVENTION An embodiment of the present invention is to provide a vehicle control apparatus capable of clearly and quickly determining a current failure state and a control method thereof.

In addition, an embodiment of the present invention provides a vehicle control device and a control method therefor that reduce anxiety about the current hydraulic circuit state while inducing the driver to drive with caution, and enable the driver to quickly respond to the current hydraulic circuit state want to

According to one aspect of the present invention, there is provided an input unit for receiving a current brake fluid level value and a current hydraulic circuit pressure value detected by the sensing device; and when the current brake fluid level value is lower than a reference brake fluid level value, regenerative braking is inhibited, and a pressure difference between a reference hydraulic circuit pressure value corresponding to the target pressure value after regenerative braking is prohibited and the current hydraulic circuit pressure value is a reference hydraulic circuit When the pressure value is out of the range, the vehicle control device including a control unit that determines that oil leakage has occurred in the current hydraulic circuit may be provided.

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According to another aspect of the present invention, after receiving the current brake fluid level value detected by the sensing device, and when the current brake fluid level value is lower than the reference brake fluid level value, regenerative braking is prohibited, and after the regenerative braking is prohibited When the current hydraulic circuit pressure value detected by the sensing device is input, and the pressure difference between the reference hydraulic circuit pressure value corresponding to the target pressure value after prohibition of regenerative braking and the current hydraulic circuit pressure value is out of the reference hydraulic circuit pressure value range A vehicle control method including determining that an oil leak has occurred in a current hydraulic circuit may be provided.

A vehicle control apparatus and a control method thereof according to an embodiment of the present invention can clearly and quickly determine a current failure state.

In addition, the vehicle control apparatus and the control method according to an embodiment of the present invention reduce anxiety about the current hydraulic circuit state while inducing a driver to drive with caution, and the driver can quickly respond to the current hydraulic circuit state .

1 is a block diagram illustrating a state in which a vehicle control device according to a first embodiment of the present invention is connected to a sensing device and a regenerative braking device;
FIG. 2 is a block diagram illustrating the vehicle control device shown in FIG. 1 as an example;
3 (a) is a graph showing the state of the braking amount when regenerative braking is not prohibited in the related art, and (b) is a graph showing the state of the braking amount when regenerative braking is prohibited according to the present invention.
4 (a) is a graph showing a pressure difference generation state when regenerative braking is not prohibited according to the related art, and (b) is a graph showing a pressure difference generation state when regenerative braking is prohibited according to the present invention.
5 is a flowchart illustrating a vehicle control method of the vehicle control apparatus according to the first embodiment of the present invention.
6 is a block diagram illustrating an example of a vehicle control apparatus according to a second embodiment of the present invention.
7 is a flowchart illustrating a vehicle control method of a vehicle control apparatus according to a second exemplary embodiment of the present invention.
8 is a flowchart illustrating a vehicle control method of a vehicle control apparatus according to another exemplary embodiment of the present invention.
9 is a flowchart illustrating a vehicle control method of a vehicle control apparatus according to another exemplary embodiment of the present invention.
10 is a flowchart illustrating a vehicle control method of a vehicle control apparatus according to another exemplary embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein, and may be embodied in other forms. The drawings may omit illustration of parts irrelevant to the description in order to clarify the present invention, and slightly exaggerate the size of the components to help understanding.

1 is a block diagram illustrating a state in which a vehicle control device is connected to a sensing device and a regenerative braking device according to a first embodiment of the present invention, and FIG. 2 is a block diagram illustrating the vehicle control device shown in FIG. 1 as an example. am.

3 (a) is a graph showing the state of the braking amount when regenerative braking is not prohibited according to the related art, and (b) is a graph showing the state of the braking amount when the regenerative braking is prohibited according to the present invention.

4 (a) is a graph showing a pressure difference generation state when regenerative braking is not prohibited according to the related art, and (b) is a graph showing a pressure difference generation state when regenerative braking is prohibited according to the present invention.

1 to 4 , the vehicle control apparatus 100 according to the first embodiment of the present invention includes an input unit 102 , a determination unit 104 , and a control unit 106 .

The input unit 102 receives the current brake fluid level value and the current hydraulic circuit pressure value detected by the sensing device 10 .

At this time, although not shown, the detection device 10 includes a brake fluid level sensor (not shown) for detecting a current brake fluid level value, and a hydraulic circuit pressure sensor (not shown) for detecting a current hydraulic circuit pressure value. may include

In addition, the sensing device 10 is not limited thereto, and may be any sensing unit for sensing the current brake fluid level value and any sensing unit for sensing the current hydraulic circuit pressure value.

The determination unit 104 determines whether the current brake fluid level value input to the input unit 102 is in a first state out of the preset reference brake fluid level value range according to the control of the control unit 106 .

For example, the determination unit 104 may determine whether the current brake fluid level value input to the input unit 102 is lower than the reference brake fluid level value under the control of the control unit 106 .

In addition, the determination unit 104 determines whether the current hydraulic circuit pressure value input to the input unit 102 is a second state out of the preset reference hydraulic circuit pressure value range according to the control of the control unit 106 .

For example, as shown in FIGS. 2 and 4 ( b ), the determination unit 104 determines that the current hydraulic circuit pressure value CC input to the input unit 102 is the pressure with the reference hydraulic circuit pressure value RC. Whether a difference occurs can be determined under the control of the control unit 106 .

At this time, when comparing the difference value between the current hydraulic circuit pressure value CC and the normal reference hydraulic circuit pressure value RC corresponding to the target pressure value TP, when the regenerative braking shown in FIG. 4(b) is prohibited Since the pressure difference generation state of is greater than the pressure difference generation state when regenerative braking is not inhibited as shown in FIG.

The control unit 106 receives the current brake fluid level value and the current hydraulic circuit pressure value output from the input unit 102 , and transmits a determination command to the determination unit 104 .

Also, in the first state, the controller 106 transmits a prohibition command to the regenerative braking device 30 to prohibit the regenerative braking of the regenerative braking device 30 .

At this time, as shown in (a) of FIG. 3 , the braking amount state when regenerative braking is not prohibited includes the IBAU (Intelligent Brake Assist Unit) side braking amount and the regenerative braking amount, whereas shown in FIG. 3 (b) As described above, in the state of the braking amount when regenerative braking is prohibited, only the braking amount of the Intelligent Brake Assist Unit (IBAU) may be included.

Also, in the second state, the control unit 106 transmits a detection command to the detection device 10 so that the detection device 10 detects the oil leakage value of the current hydraulic circuit.

Here, although not shown, the sensing device 10 may include a hydraulic circuit oil leak detection sensor (not shown) for detecting the oil leakage value of the current hydraulic circuit, but is not limited thereto. It may be any sensing means for

At this time, although not shown, the input unit 102 , the determination unit 104 , and the control unit 106 control the overall operation with a main computer applied to the vehicle and transmit input and determination, prohibition command, and detection command. It may be provided to an ECU (Electric Control Unit, not shown).

In addition, although not shown, the input unit 102, the determination unit 104, and the control unit 106 are equipped with a processor, a memory and an input/output device inside a single chip to control the overall operation and to execute input and judgment, prohibition and detection commands. It may be provided to a typical MCU (Micro Control Unit, not shown) for transmitting.

In addition, the input unit 102, the determination unit 104, and the control unit 106 are not limited thereto, and control the overall operation of the vehicle and transmit input and determination, prohibition command and detection command, and all control means and determination means and It is possible as long as it is an input means.

Here, the input unit 102, the determination unit 104, and the control unit 106 may be provided to an ECU (not shown) or an MCU (not shown) as an integrated type, and may be provided to an ECU (not shown) or an MCU (not shown) as a separate type. can be provided on

A vehicle control method for controlling a vehicle using the vehicle control apparatus 100 according to the first embodiment of the present invention will be described in FIG. 5 .

5 is a flowchart illustrating a vehicle control method of the vehicle control apparatus according to the first embodiment of the present invention.

Referring to FIG. 5 , the vehicle control method 500 of the vehicle control apparatus ( 100 in FIG. 2 ) according to the first embodiment of the present invention includes a first input step S502 , a first determination step S504 , and regenerative braking. It includes a prohibition step (S506), a second input step (S508), a second determination step (S510), and a detection step (S512).

First, in the first input step ( S502 ), the current brake fluid level value detected by the sensing device ( 10 in FIG. 2 ) is input from the input unit ( 102 in FIG. 2 ).

Thereafter, in the first determination step S504, the control unit (106 in FIG. 2) determines whether the current brake fluid level value input to the input unit (102 in FIG. 2) is a first state out of the preset reference brake fluid level value range. According to the control, the determination unit (104 in Fig. 2) determines.

For example, in the first determination step S504 , the determination unit ( FIG. 2 ) determines whether the current brake fluid level value input to the input unit (102 in FIG. 2 ) is lower than the reference brake fluid level value under the control of the control unit ( 106 in FIG. 2 ). 104) of 2 can be judged.

Thereafter, in the regenerative braking prohibition step S506 , when the determination unit ( 104 in FIG. 2 ) determines that the first state is in the first state, the regenerative braking device (in FIG. 2 ) prohibits the regenerative braking of the regenerative braking device ( 30 in FIG. 2 ). 30), the control unit (106 in FIG. 2) transmits a prohibition command.

In this case, the regenerative braking prohibition step S506 may include only the IBAU (Intelligent Brake Assist Unit) side braking amount (FIG. 3(b)) in the braking amount state when the regenerative braking is prohibited.

Thereafter, in the second input step ( S508 ), the current hydraulic circuit pressure value sensed by the sensing device ( 10 in FIG. 2 ) is input from the input unit ( 102 in FIG. 2 ).

After that, the second determination step (S510) of the controller (106 in FIG. 2) determines whether the current hydraulic circuit pressure value input to the input unit (102 in FIG. 2) is in a second state out of the preset reference hydraulic circuit pressure value range. According to the control, the determination unit (104 in Fig. 2) determines.

As an example, in the second determination step S510, the current hydraulic circuit pressure value (CC in Fig. 4(b)) input to the input unit (102 in Fig. 2) is the reference hydraulic circuit pressure value (in Fig. 4(b)) RC], it can be determined by the determination unit (104 in FIG. 2) under the control of the control unit (106 in FIG. 2) whether or not a pressure difference occurs.

At this time, when comparing the difference between the current hydraulic circuit pressure value (CC in Fig. 4) and the normal reference hydraulic circuit pressure value (RC in Fig. 4) corresponding to the target pressure value (TP in Fig. 4), the regeneration of the present invention Since the pressure difference generation state when braking is prohibited [FIG. 4(b)] is larger than the conventional pressure difference generation state [FIG. 4(a)] when regenerative braking is not inhibited, it can be confirmed that it occurs early.

After that, in the detection step S512, if the determination unit (104 in FIG. 2) determines that the second state is the second state, the detection device (10 in FIG. 2) detects the oil leakage value of the current hydraulic circuit in the detection device (10 in FIG. 2). 10), the control unit (106 in FIG. 2) transmits a detection command.

As described above, the vehicle control apparatus 100 and the control method 500 according to the first embodiment of the present invention include the input unit 102 , the determination unit 104 , and the control unit 106 in the first input step ( S502 ). ), a first determination step (S504), a regenerative braking prohibition step (S506), a second input step (S508), a second determination step (S510), and a detection step (S512) are performed.

Accordingly, in the vehicle control apparatus 100 and the control method 500 according to the first embodiment of the present invention, when the current brake fluid level value is lower than the reference brake fluid level value, regenerative braking is prohibited, and then the current hydraulic circuit It is possible to detect the leakage value of

Accordingly, since the vehicle control apparatus 100 and the control method 500 according to the first embodiment of the present invention can increase the pressure difference generation state when regenerative braking is prohibited, it is possible to check the pressure difference generation state early. Therefore, it is possible to determine the current fault condition clearly and quickly.

6 is a block diagram illustrating an example of a vehicle control apparatus according to a second embodiment of the present invention.

Referring to FIG. 6 , the vehicle control apparatus 600 according to the second embodiment of the present invention includes an input unit 602 and a determination unit 604 similarly to the vehicle control apparatus 100 according to the first embodiment ( 100 in FIG. 2 ). and a control unit 606 .

The functions of the input unit 602, the determination unit 604, and the control unit 606 of the vehicle control device 600 according to the second embodiment of the present invention, and the organic connection relationship between them, are Since the functions of the input unit (102 in Fig. 2), the determination unit (104 in Fig. 2), and the control unit (106 in Fig. 2) of the vehicle control device (100 in Fig. 2) of the vehicle control device (100 in Fig. 2) are the same and the organic connection relationship therebetween, this Each of the additional descriptions will be omitted below.

Here, the vehicle control apparatus 600 according to the second embodiment of the present invention may further include an identification unit 608 .

That is, when the control unit 606 transmits the prohibition command to the regenerative braking device 30 , the identification unit 608 can identify prohibition of the regenerative braking of the regenerative braking device 30 under the control of the control unit 606 . there is.

In addition, when the regenerative braking prohibition completion signal output from the regenerative braking device 30 is supplied from the controller 606 , the identification unit 608 controls that the regenerative braking of the regenerative braking device 30 is prohibited. can be identified according to

Also, when the control unit 606 transmits the detection command to the sensing device 10 , the identification unit 608 may identify that the current oil leakage value of the hydraulic circuit is detected under the control of the control unit 606 .

In addition, when the identification unit 608 receives the oil leakage value detection completion signal output from the sensing device 10 from the control unit 606 , the identification unit 608 identifies that the oil leakage value of the current hydraulic circuit has been detected under the control of the control unit 606 . can be

At this time, although not shown, the identification unit 608 includes at least one of an alarm (not shown) and a speaker (not shown) and a light emitting member (not shown) provided for the driver to identify information or state of the vehicle, An operation for prohibiting regenerative braking of the regenerative braking device 30 and regenerative braking through at least one of an alarm operation of an alarm (not shown), a voice operation of a speaker (not shown), and a light emission operation of a light emitting member (not shown) At least one of an operation in which the regenerative braking of the device 30 is prohibited, an operation of detecting an oil leakage value of the current hydraulic circuit, and an operation in which the detection of the current oil leakage value of the current hydraulic circuit is completed may be identified.

In addition, although not shown, the identification unit 608 is an HMI (Human Machine Interface) module (not shown) and a HUD (Head-UP Display) module mounted to interface the user with the machine so that the driver can grasp information or status of the vehicle. Regenerative braking of the regenerative braking device 30 through at least one of an HMI message display operation of the HMI module (not shown) and a HUD message display operation of the HUD module (not shown), including at least one of (not shown) At least one of an operation for prohibiting the regenerative braking device 30, an operation for completing prohibition of the regenerative braking of the regenerative braking device 30, an operation for detecting an oil leakage value of the current hydraulic circuit, and an operation for completing detection of the oil leakage value of the current hydraulic circuit can be identified. .

A vehicle control method for controlling a vehicle using the vehicle control apparatus 600 according to the second embodiment of the present invention will be described with reference to FIGS. 7 to 10 .

7 is a flowchart illustrating a vehicle control method of a vehicle control apparatus according to a second embodiment of the present invention as an example, and FIG. 8 is another example illustrating a vehicle control method of a vehicle control apparatus according to the second exemplary embodiment of the present invention. It is a flowchart.

9 is a flowchart illustrating another example of a vehicle control method of a vehicle control apparatus according to a second embodiment of the present invention, and FIG. 10 is another example of a vehicle control method of a vehicle control apparatus according to the second exemplary embodiment of the present invention. It is a flowchart shown as an example.

7 to 10 , the vehicle control methods 700 to 1000 of the vehicle control apparatus 600 in FIG. 6 according to the second embodiment of the present invention are described in the vehicle control apparatus (in FIG. 2 ) according to the first embodiment. 100), the first input step (S702 to S1002), the first determination step (S704 to S1004), the regenerative braking prohibition step (S706 to S1006), and the second input step ( S708 to S1008), and the second determination step (S710 to S1010) and the detection step (S712 to S1012).

Among the vehicle control methods 700 to 1000 of the vehicle control apparatus 600 in FIG. 6 according to the second embodiment of the present invention, the first input steps (S702 to S1002) and the first determination steps (S704 to S1004) and The functions for the regenerative braking prohibition step (S706 to S1006), the second input step (S708 to S1008), the second determination step (S710 to S1010) and the detection step (S712 to S1012) and the organic connection relationship between them are the first Among the vehicle control method (500 in FIG. 5) of the vehicle control apparatus (100 in FIG. 2) according to the embodiment, the first input step (S502 in FIG. 5), the first determination step (S504 in FIG. 5), and regenerative braking prohibition step The functions for (S506 in Fig. 5), the second input step (S508 in Fig. 5), the second determination step (S510 in Fig. 5), and the detection step (S512 in Fig. 5) are the same as the organic connection relationship between them. , respective amplified descriptions for this will be omitted below.

Here, in the vehicle control methods 700 to 1000 of the vehicle control apparatus ( 600 in FIG. 6 ) according to the second embodiment of the present invention, the first identification step S705 , the second identification step S807 , and the third identification It may further include a step (S911) and a fourth identification step (S1013).

First, the first identification step S705 may be performed after the first determination step S704 and before the regenerative braking prohibition step S706 .

As another example, although not shown, the first identification step (not shown) may be performed in synchronization with the regenerative braking prohibition step S706 .

That is, in the first identification step S705, when the control unit (606 in FIG. 6) transmits the prohibition command to the regenerative braking device (30 in FIG. 6), the regenerative braking of the regenerative braking device (30 in FIG. 6) is prohibited. It can be identified by the identification unit (608 in FIG. 6) under the control of the control unit (606 in FIG. 6).

Also, the second identification step S807 may be performed after the regenerative braking prohibition step S806 and before the second input step S808 .

As another example, although not shown, the second identification step (not shown) may be performed in synchronization with the second input step S808 .

That is, in the second identification step ( S807 ), when the control unit ( 606 of FIG. 6 ) receives the regenerative braking prohibition completion signal output from the regenerative braking device ( 30 in FIG. 6 ), the regenerative braking device ( 30 in FIG. 6 ) is supplied. The identification unit ( 608 in FIG. 6 ) can identify that the braking is prohibited under the control of the control unit ( 606 in FIG. 6 ).

Also, the third identification step ( S911 ) may be performed after the second determination step ( S910 ) and before the detection step ( S912 ).

As another example, although not shown, the third identification step (not shown) may be performed in synchronization with the detection step S912 .

That is, in the third identification step (S911), when the control unit (606 in FIG. 6) transmits the detection command to the detection device (10 in FIG. 6), the control unit (606 in FIG. 6) detects the current oil leakage value of the hydraulic circuit. can be identified by the identification unit (608 in FIG. 6) under the control of .

In addition, the fourth identification step (S1013) may be performed after the detection step (S1012).

That is, in the fourth identification step (S1013), when the control unit (606 in FIG. 6) receives the oil leakage value detection completion signal output from the sensing device (10 in FIG. 6), the control unit ( According to the control of 606 in FIG. 6, the identification unit (608 in FIG. 6) can identify it.

As described above, the vehicle control apparatus 600 and the control methods 700 to 1000 according to the second embodiment of the present invention include an input unit 602 , a determination unit 604 , and a control unit 606 and an identification unit 608 . including the first input step (S702 to S1002), the first determination step (S704 to S1004), the first identification step (S705), the regenerative braking prohibition step (S706 to S1006), and the second identification step (S807) and the second The input steps (S708 to S1008), the second determination steps (S710 to S1010), the third identification step (S911), the detection steps (S712 to S1012), and the fourth identification step (S1013) are performed.

Accordingly, in the vehicle control apparatus 600 and the control methods 700 to 1000 according to the second embodiment of the present invention, when the current brake fluid level value is lower than the reference brake fluid level value, regenerative braking is prohibited, and then the current It becomes possible to detect the value of oil leakage in the hydraulic circuit.

Accordingly, since the vehicle control apparatus 600 and the control methods 700 to 1000 according to the second embodiment of the present invention can increase the pressure difference generation state when the regenerative braking is prohibited, the pressure difference generation state can be controlled early. It is possible to determine the current fault state clearly and quickly.

In addition, the vehicle control device 600 and the control methods 700 to 1000 according to the second embodiment of the present invention can identify a situation in which the regenerative braking of the regenerative braking device 30 is prohibited, and the regenerative braking device ( 30), it is possible to identify a situation in which the regenerative braking is prohibited, it is possible to identify a situation in which the oil leakage value of the current hydraulic circuit is detected, and it is possible to identify a situation in which the oil leakage value of the current hydraulic circuit is detected.

Accordingly, in the vehicle control apparatus 600 and the control methods 700 to 1000 thereof according to the second embodiment of the present invention, the driver can recognize a situation in which the regenerative braking of the regenerative braking device 30 is prohibited, and the regenerative braking is performed. It is possible to recognize a situation in which the regenerative braking of the device 30 is prohibited, a situation in which a current oil leakage value of the hydraulic circuit is detected, and a situation in which the current oil leakage value of the hydraulic circuit is detected can be recognized.

Accordingly, the vehicle control apparatus 600 and the control methods 700 to 1000 according to the second embodiment of the present invention reduce anxiety about the current hydraulic circuit state while inducing the driver to drive with caution, and allow the driver to use the current hydraulic circuit It is possible to quickly respond to the initial state of the situation.

Claims (8)

◈Claim 1 was abandoned when paying the registration fee.◈ an input unit receiving the current brake fluid level value and the current hydraulic circuit pressure value detected by the sensing device; and
When the current brake fluid level value is lower than the reference brake fluid level value, regenerative braking is prohibited, and a pressure difference between the reference hydraulic circuit pressure value corresponding to the target pressure value after the regenerative braking is prohibited and the current hydraulic circuit pressure value is the reference hydraulic circuit pressure A vehicle control device including a control unit that determines that an oil leak has occurred in the current hydraulic circuit when the value is out of the range. delete delete delete delete delete delete Receives the current brake fluid level value detected by the detection device,
When the current brake fluid level value is lower than the reference brake fluid level value, regenerative braking is prohibited,
After prohibiting the regenerative braking, the current hydraulic circuit pressure value detected by the sensing device is input;
and determining that oil leakage has occurred in the current hydraulic circuit when the pressure difference between the reference hydraulic circuit pressure value corresponding to the target pressure value after prohibition of the regenerative braking and the current hydraulic circuit pressure value is out of a reference hydraulic circuit pressure value range Way.

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