KR20220121519A - System and method for injection of brake oil - Google Patents

Abstract

Disclosed are a system for injecting brake oil and a method thereof. According to an embodiment of the present invention, the system for injecting brake oil for performing work within a limited process cycle time of a vehicle factory. The system comprises: a communication unit which connects an on-board diagnostic (OBD) terminal of a vehicle entering a brake oil injection process with diagnostic communication; a vacuum unit which makes a vacuum state by emitting air in a brake system of the vehicle through a vacuum pump; an injection unit which injects brake oil into a reserve tank and a pipe of the brake system, wherein the reserve tank and the pipe are connected through an injection gun; and a control unit which controls overall operations for composition of each unit, checks whether the vehicle is applied with electronic stability program (ESC) specifications through the diagnostic communication, and quickly injects the brake oil into four wheels with high pressure by a hydraulic control unit (HCU) of the vehicle and forcible driving of the ESC by applying a control signal to the OBD terminal when injecting the brake oil. The present invention has the effect of shortening injection time.

Description

SYSTEM AND METHOD FOR INJECTION OF BRAKE OIL

The present invention relates to a brake fluid injection system and method therefor, and more particularly, to a brake fluid injection system and method capable of stably injecting brake fluid into a vehicle within a limited process cycle time in an inline process.

In general, in the inline process of a vehicle factory, a brake system of a vehicle is assembled through a preceding process, and then a brake fluid injection process using a hydraulic control unit (HCU) is performed.

For example, FIG. 1 shows a conventional method of injecting brakes in a vehicle.

Referring to FIG. 1 , the conventional brake fluid injection process is completed after performing a brake pipe vacuum step, a brake fluid injection step, and a top-off step of adjusting the brake fluid level of the reserve tank.

At this time, in the brake fluid injection step, the maximum supply pressure generated from the injection cylinder of the facility is delivered to the circuit of the HCU and the vicinity of the four wheel cylinders.

However, in the actual brake injection process line, it is inevitable to inject less than the maximum supply pressure due to the problem of the internal pressure limit of the brake fluid reserve tank, and the injection time increases due to the pressure loss due to the resistance of the long and narrow brake fluid pipe. .

In addition, in the limited process cycle time of the automation line, the vacuum time can be reduced due to the problem of increasing the injection time, and vehicle quality such as lowering of braking power and vehicle pushing due to sponge phenomenon due to residual air in the pipeline, and noise generation during HCU operation There are problems that adversely affect the

Matters described in this background section are prepared to promote understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

An embodiment of the present invention provides a brake fluid capable of rapidly and stably injecting brake fluid at high pressure using an ESC (Electronic Stability Controller) function of an HCU (Hydraulic Control Unit) mounted on a vehicle when injecting brake fluid in an inline process. An infusion system and method are provided.

According to one aspect of the present invention, a brake fluid injection system that operates within a limited process cycle time of a vehicle factory includes a communication unit that connects an On-Board Diagnostics (OBD) terminal of a vehicle that has entered a brake fluid injection process and diagnostic communication; a vacuum unit for discharging air in the brake system of the vehicle through a vacuum pump to create a vacuum state; an injection unit for injecting brake fluid into a reservoir tank and a pipe of the brake system connected through an injection gun; It controls the overall operation of the configuration of each part, confirms the application of the ESC (Electronic Stability Program) specification of the vehicle through the diagnostic communication, and applies a control signal to the OBD terminal when the brake fluid is injected Control Unit) and a control unit that rapidly injects the brake fluid to the four wheels at high pressure according to the forced driving of the ESC.

In addition, the control unit checks the specifications of the vehicle through the OBD terminal, and injects the brake fluid at the injection pressure of the HCU in the case of a vehicle to which ESC is not applied. It is possible to deliver the brake fluid at the high pressure added to the ESC pressure according to the forced driving.

In addition, the control unit sets the setting data for the brake fluid injection process differently depending on whether the ESC specification is applied to the vehicle, but shortens the injection time of the vehicle to which the ESC is applied compared to the vehicle not to which the ESC is applied, and the vacuum time is set accordingly. And it is possible to increase the top-off time.

Also, the controller may count at least one of the brake fluid injection time and the injection amount when the brake fluid is injected.

In addition, when at least one of the brake fluid injection time and injection amount of the ESC applied vehicle meets the first reference value set according to the ESC specification, the control unit stops the injection and adjusts the brake fluid level of the reserve tank. have.

In addition, when at least one of the brake fluid injection time and injection amount of the non-ESC vehicle meets the second reference value set according to the ESC specification, the control unit stops the injection and adjusts the brake fluid level of the reserve tank. have.

Meanwhile, according to an aspect of the present invention, a method for injecting brake fluid into a vehicle by a brake fluid injection system of a vehicle factory within a limited process cycle time, a) -Board Diagnostics) connecting the terminal and diagnostic communication; b) making a vacuum state by discharging air in the brake system of the vehicle through a vacuum pump; c) injecting brake fluid into a reservoir tank and a pipe of the brake system connected through an injection gun; and d) confirming application of the ESC (Electronic Stability Program) specification of the vehicle through the diagnostic communication, and applying a control signal to the OBD terminal when injecting the brake fluid to force the HCU (Hydraulic Control Unit) of the vehicle and the ESC and rapidly injecting the brake fluid at a high pressure according to the driving.

In addition, the step a) may include controlling the vehicle in the IG ON mode by transmitting a power-on signal through the diagnostic communication.

Also, step c) may include counting at least one of an injection time and an injection amount of the brake fluid.

In addition, the step d) may include, if it is determined that the ESC specification is applied to the vehicle, stopping the injection when at least one of the brake fluid injection time and injection amount meets a first reference value set according to the ESC specification; and performing a top-off of adjusting the brake fluid level of the reserve tank and then terminating the top-off.

In addition, the step d) may include, if it is determined that the ESC specification is not applied to the vehicle, stopping the injection when at least one of the brake fluid injection time and injection amount meets a second reference value set according to the ESC specification; and performing a top-off of adjusting the brake fluid level of the reserve tank and then terminating the top-off operation.

In addition, in step d), the brake fluid injection time may be set to be shorter than the first reference value set according to whether the ESC is specified or not, compared to the second reference value.

Meanwhile, according to another aspect of the present invention, a brake fluid injection method in which an On-Board Diagnostics (OBD) terminal mounted on a vehicle assembled at a factory interlocks with a brake fluid injection system includes: a) When entering the brake fluid injection process connecting the brake fluid injection system and diagnostic communication through an antenna; b) controlling the vehicle in IG ON mode according to a power ON signal received from the brake fluid injection system to supply power in a non-starting state; c) confirming the ESC (Electronic Stability Program) specification applied to the HCU (Hydraulic Control Unit) of the vehicle and transmitting it to the brake fluid injection system; and d) receiving a control signal from the brake fluid injection system, controlling the HCU to generate an injection pressure, and at the same time forcibly driving the ESC function to quickly inject the brake fluid to the four wheels. do.

According to an embodiment of the present invention, in the brake fluid injection process, by injecting the brake fluid at a high pressure using the HCU and ESC functions applied to the vehicle, there is an effect that the injection time can be shortened and the injection time can be quickly injected.

In addition, it is possible to increase the vacuum time in the process cycle time limited by the spare time secured by the shortening of the injection time, so that it is possible to improve the sponge phenomenon and the HCU joint problem according to the formation of a sufficient vacuum atmosphere.

In addition, it is possible to increase the top-off time in the process cycle time limited by the spare time secured by the shortening of the injection time, so that the quality of the brake fluid level of the vehicle reservoir tank can be improved.

1 shows a conventional method of injecting a brake of a vehicle.
2 schematically shows the configuration of a brake fluid injection system according to an embodiment of the present invention.
3 shows a vehicle ESC circuit configuration according to an embodiment of the present invention.
4 is a flowchart schematically illustrating a vehicle brake control method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as “…unit”, “…group”, and “module” described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software or a combination of hardware and software. have.

Throughout the specification, terms such as first, second, A, B, (a), (b), etc. may be used to describe various elements, but the elements should not be limited by the terms. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms.

Throughout the specification, when an element is referred to as 'connected' or 'connected' to another element, it may be directly connected to or connected to the other element, but another element may exist in between. It should be understood that there may be On the other hand, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that there is no other element in the middle.

Throughout the specification, terms used are merely 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.

Throughout the specification, terms related to 'comprising', 'having', etc. are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features. It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise herein, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as being consistent with the contextual meaning of the related art, and shall not be construed in an ideal or overly formal meaning unless explicitly defined herein.

Now, a brake fluid injection system and method according to an embodiment of the present invention will be described in detail with reference to the drawings.

2 schematically shows the configuration of a brake fluid injection system according to an embodiment of the present invention.

Referring to FIG. 2 , the brake fluid injection system 100 according to an embodiment of the present invention includes a vehicle 10 including an Electronic Stability Control (ESC), a communication unit 110 , and a vacuum unit 120 . , an injection unit 130 and a control unit 140 .

The brake fluid injection system 100 connects the diagnostic communication with the vehicle 10 entered through the conveyor after assembling the brake system, and quickly injects the brake fluid with high pressure through the forced driving of the vehicle attitude control device (ESC) when injecting the brake fluid. and inject stably. The diagnostic communication may be connected wirelessly through an antenna or may be connected through a wired interface.

The vehicle 10 includes a brake disk 14 provided in an On-Board Diagnostics (OBD) terminal, a hydraulic control unit (HCU, 12), an ESC 13, and four wheels (FR, FL, RR, RL), respectively. ) and a caliper 15 .

The OBD terminal 11 is randomly mounted on the vehicle 10 and moves along the conveyor, connects the brake fluid injection system 100 and diagnostic communication through the antenna of the entered process, and connects to the vehicle internal network (eg, CAN). ) to connect the HCU (12) and the ESC (13). That is, the OBD terminal 11 serves to relay heterogeneous communication between an external facility system and various systems and controllers in the vehicle mounted thereon. In addition, the antenna connects the OBD terminal 11 of the vehicle 10 and diagnostic communication to relay data transmitted and received between the brake fluid injection system 100 and the vehicle 10 . The antenna may be configured as a directional antenna for short-range communication, and a plurality of antennas may be disposed at regular intervals along a conveyor on which the vehicle 10 is moved.

The OBD terminal 11 matches and stores its own unique identification information (OBD ID) and a loaded vehicle ID (eg, VIN), and through the connection of diagnostic communication, the vehicle model, specifications and location information of the vehicle are transmitted to the outside. can be recognized

When the diagnostic communication is connected, the OBD terminal 11 enters the IG ON mode according to the power ON signal received from the brake fluid injection system 100 to provide the HCU 12 and the ESC 13. Make sure the power is supplied.

The HCU 12 is a hydraulic controller applied to the vehicle's brake system, and generates an injection pressure in the pipe of each wheel (FR, FL, RR, RL) when the brake fluid is injected.

The HCU 12 is a higher-level controller of the vehicle's brake system and may include the ESC 13 or an anti-lock brake system (ABS) function of a general vehicle according to specifications. Here, the brake fluid injection method according to the embodiment of the present invention targets the vehicle 10 to which the ESC 13 specification is applied.

When the OBD terminal 11 is connected to the vehicle 10 , the HCU 12 transmits the brake system specification according to whether the ESC 13 is applied, which may be transmitted to the brake fluid injection system 100 through diagnostic communication. .

Also, the HCU 12 may drive the ESC 13 according to a control signal received from the brake fluid injection system 100 for brake fluid injection.

The ESC 13 is a vehicle attitude control device to which a function of independently controlling the braking force of each wheel for braking safety is added, and is also called an Electronic Stability Program (ESP).

The ESC (13) uses various sensors such as wheel speed sensor, steering angle sensor, yaw rate and lateral acceleration sensor to independently brake each wheel and control the engine output when the vehicle's behavior is unstable through various sensors to improve the steering stability of the vehicle. can be obtained

The ESC 13 is forcibly driven according to a control signal applied from the HCU 12 when the brake fluid is injected in the brake fluid injection system 100 to generate high-pressure braking oil pressure (ESC pressure) on the four wheels of the vehicle. Here, since the brake fluid pressure is a vacuum state in which the brake fluid is not currently filled in the brake system pipe of the vehicle, it may be referred to as an ESC pressure for substantially filling the brake fluid with a high pressure. That is, the ESC pressure is a pressure for rapidly delivering the injected brake fluid to the end of the caliper 15 of each wheel.

3 shows a vehicle ESC circuit configuration according to an embodiment of the present invention.

Referring to FIG. 3 , the ESC 13 according to an embodiment of the present invention includes a motor pump M that generates ESC pressure, a FL valve FL_V that adjusts the ESC pressure of the front left wheel FL of the vehicle, and the front The FR valve (FR_V) that controls the brake hydraulic pressure of the right wheel (FR), the RL valve (RL_V) that regulates the ESC pressure of the rear left wheel (RL), the RR valve ( RR_V).

The ESC (13) operates the motor pump (M) according to the applied control signal to generate the ESC pressure, and to the caliper (15) of each wheel through the adjustment of each valve (V) that controls the strength of the braking hydraulic pressure. It can deliver a large ESC pressure of about 100 to 200 bar. Since the mechanically large brake hydraulic pressure is considerably larger and faster than the pressure that a person applies to brake, the time required for injecting the brake fluid per vehicle can be shortened.

Meanwhile, the brake fluid injection system 100 includes a communication unit 110 , a vacuum unit 120 , an injection unit 130 , and a control unit 140 .

The communication unit 110 connects the diagnostic communication with the OBD terminal 11 of the vehicle 10 that has entered the brake fluid injection process through an antenna. The communication unit 110 may verify the vehicle ID by authenticating the OBD terminal ID of the OBD terminal 11 connected to the antenna.

The vacuum unit 120 discharges air in the brake system pipe of the vehicle 10 through a vacuum pump to create a vacuum state. In addition, the vacuum unit 120 may recover a certain amount of brake fluid to adjust the brake fluid level of the reserve tank during top-off after injecting the brake fluid.

The injection unit 130 includes a brake fluid storage tank and an injection gun, and injects brake fluid into a reservoir tank and a pipe of the brake system connected through the injection gun.

The control unit 140 stores various programs and data for the operation of the brake fluid injection system 100 according to an embodiment of the present invention in a memory, and a processing processor, PLC ( Programmable Logic Controller) and at least one of a circuit.

The control unit 140 sets the setting data of the brake fluid injection process differently depending on whether the specification of the ESC 13 of the vehicle 10 is applied, but shortens the injection time of the applied vehicle compared to the non-applied vehicle and uses the spare time secured accordingly. It is possible to increase the vacuum time and the top-off time (see FIG. 5).

The control unit 140 connects the diagnostic communication with the OBD terminal 11 of the vehicle 10 entered into the process, and forcibly drives the functions of the HCU 12 and the ESC 13 when the brake fluid is injected through the injection unit 130 . This quickly delivers the brake fluid to the four wheels.

The control unit 140 may be implemented as one or more processors operating according to a set program, and the set program may be programmed to perform each step of the brake fluid injection method according to an embodiment of the present invention.

Such a vehicle brake control method will be described in more detail with reference to the drawings below, but the control unit 140 may be integrated into the brake fluid injection system 100 , and the main body will be described as the brake fluid injection system 100 . let it do

4 is a flowchart schematically illustrating a vehicle brake control method according to an embodiment of the present invention.

Referring to FIG. 4 , in the embodiment of the present invention, the brake fluid injection system 100 connects diagnostic communication with the OBD terminal 11 of the vehicle 10 that has entered the brake fluid injection process through the communication unit 110 ( S1).

The brake fluid injection system 100 controls the vehicle 10 in the IG ON mode by transmitting a power ON signal through the diagnostic communication (S2). At this time, when the diagnostic communication is connected, the OBD terminal 11 controls the vehicle 10 in IG ON mode according to the power ON signal received from the brake fluid injection system 100 to supply power in the non-start state. supply

The brake fluid injection system 100 discharges air in the brake system pipe of the vehicle 10 through the vacuum unit 120 to create a vacuum state (S3).

When the vacuum operation for a predetermined time is completed, the brake fluid injection system 100 performs an injection operation of injecting brake fluid into the brake system of the vehicle 10 through the injection unit 130 ( S4 ). At this time, the brake fluid injection system 100 may count at least one of a brake fluid injection time and an injection amount.

In addition, the brake fluid injection system 100 checks the specifications of the HCU 12 through the OBD terminal 11 at the same time as the injection operation (S5). At this time, when it is determined that the ESC 13 function is applied (S5; Yes), the brake fluid injection system 100 applies a control signal through diagnostic communication to forcibly drive the ESC 13 function of the HCU 12 to brake The liquid is quickly transferred to the four wheels (S6). Here, the brake fluid injection system 100 may deliver the brake fluid at a high pressure in which the ESC pressure according to the forced driving of the ESC 13 is added to the injection pressure of the HCU 12 .

Thereafter, when at least one of the brake fluid injection time and the injection amount meets the first reference value set according to the ESC specification (S8; Yes), the brake fluid injection system 100 stops the injection operation and adjusts the brake fluid level of the reserve tank. After performing the adjusted top-off (S9). However, if the brake fluid injection system 100 does not meet the first reference value in step S8 (S8; No), the injection operation may continue until it is satisfied.

On the other hand, in the step S5, when it is determined that the ESC 13 is not applied to the HCU 12 (eg, ABS specification) (S5; No), the HCU 12 injection pressure After performing the injection operation according to the method, if the second reference value set therefor is met (S8; Yes), the top-off operation is terminated (S9). Here, the first reference value set according to the ESC specification may be set to shorten the brake fluid injection time by about 10 seconds compared to the second reference value.

As such, according to an embodiment of the present invention, in the brake fluid injection process, by injecting the brake fluid at a high pressure using the HCU and ESC functions applied to the vehicle, there is an effect that the injection time can be shortened and the injection can be quickly performed.

In addition, it is possible to increase the vacuum time in the process cycle time limited by the spare time secured by the shortening of the injection time, so that it is possible to improve the sponge phenomenon and the HCU joint problem according to the formation of a sufficient vacuum atmosphere.

In addition, it is possible to increase the top-off time in the process cycle time limited by the spare time secured by the shortening of the injection time, so that the quality of the brake fluid level of the vehicle reservoir tank can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various other modifications are possible.

For example, although the vehicle brake control method according to the embodiment of the present invention shown in FIG. 4 has been described as the main body of the brake fluid injection system 100 , the present invention is not limited thereto, and the OBD terminal 11 mounted on the vehicle 10 is the main subject. can be explained as

For example, referring to FIG. 4 , a method of injecting brake fluid according to the interlocking of the OBD terminal 11 mounted on a vehicle assembled at a factory with the brake fluid injection system 100 is as follows.

In step S2, when the diagnostic communication is connected, the OBD terminal 11 controls the vehicle 10 in IG ON mode according to the power ON signal received from the brake fluid injection system 100 to supply power.

In addition, in step S5 , the OBD terminal 11 may check the specification of the ESC 13 applied to the HCU 12 and transmit it to the brake fluid injection system 100 through the diagnostic communication.

And, in step S6, when the OBD terminal 11 receives a control signal from the brake fluid injection system 100, it controls the HCU 12 to generate an injection pressure, and at the same time forcibly drives the ESC 13 function. It is possible to quickly deliver the brake fluid to the four wheels (S6).

Therefore, the brake fluid injection system 100 according to the embodiment of the present invention is a brake fluid injection process by interlocking control of the HCU 12 and the ESC 13 in the vehicle 10 through diagnostic communication using the OBD terminal 11 . It has the advantage of shortening the injection time and increasing the vacuum and top-off times.

The embodiment of the present invention is not implemented only through the apparatus and/or method described above, but a program for realizing a function corresponding to the configuration of the embodiment of the present invention, a recording medium in which the program is recorded, etc. Also, such an implementation can be easily implemented by an expert in the technical field to which the present invention pertains from the description of the above-described embodiment.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improved forms of the present invention are also provided by those skilled in the art using the basic concept of the present invention as defined in the following claims. is within the scope of the right.

10: vehicle 11: OBD terminal
12: HCU 13: ESC
14: brake disc 15: caliper
100: brake fluid injection system 110: communication department
120: vacuum unit 130: injection unit
140: control unit

Claims (13)

A brake fluid injection system that works within a limited process cycle time of a vehicle factory, the system comprising:
a communication unit that connects diagnostic communication with an On-Board Diagnostics (OBD) terminal of a vehicle that has entered the brake fluid injection process;
a vacuum unit for discharging air in the brake system of the vehicle through a vacuum pump to create a vacuum state;
an injection unit for injecting brake fluid into a reservoir tank and a pipe of the brake system connected through an injection gun;
It controls the overall operation of the configuration of each part, confirms the application of the ESC (Electronic Stability Program) specification of the vehicle through the diagnostic communication, and applies a control signal to the OBD terminal when the brake fluid is injected Control Unit) and a control unit for rapidly injecting the brake fluid up to the four wheels at high pressure according to the forced driving of the ESC;
A brake fluid injection system comprising a. According to claim 1,
the control unit
By checking the specifications of the vehicle through the OBD terminal, the brake fluid is injected at the injection pressure of the HCU in the case of a vehicle to which ESC is not applied. A brake fluid injection system that delivers the brake fluid at the high pressure plus the ESC pressure. 3. The method of claim 1 or 2,
the control unit
The setting data for the brake fluid injection process is set differently depending on whether the ESC specification of the vehicle is applied,
Brake fluid injection system that shortens the injection time of ESC-applied vehicles compared to non-ESC-applied vehicles and increases the vacuum time and top-off time with the spare time secured accordingly. 4. The method of claim 3,
the control unit
A brake fluid injection system for counting at least one of a brake fluid injection time and an injection amount when the brake fluid is injected. 5. The method of claim 4,
the control unit
When at least one of a brake fluid injection time and an injection amount of the ESC applied vehicle meets a first reference value set according to an ESC specification, the injection is stopped and a top-off is performed to adjust the brake fluid level in the reserve tank. 6. The method of claim 5,
the control unit
When at least one of a brake fluid injection time and injection amount of the vehicle without ESC meets a second reference value set according to an ESC specification, the injection is stopped and a top-off is performed to adjust the brake fluid level in the reserve tank. A method for injecting brake fluid into a vehicle within a limited process cycle time by a brake fluid injection system of a vehicle factory, the method comprising:
a) connecting diagnostic communication with an On-Board Diagnostics (OBD) terminal of a vehicle that has entered the brake fluid injection process through a communication unit;
b) making a vacuum state by discharging air in the brake system of the vehicle through a vacuum pump;
c) injecting brake fluid into a reservoir tank and a pipe of the brake system connected through an injection gun; and
d) Check application of the ESC (Electronic Stability Program) specification of the vehicle through the diagnostic communication, and apply a control signal to the OBD terminal when injecting the brake fluid to forcibly drive the HCU (Hydraulic Control Unit) of the vehicle and the ESC rapidly injecting the brake fluid at a high pressure according to the
A method of injecting brake fluid comprising a. 8. The method of claim 7,
Step a) is,
and controlling the vehicle in the IG ON mode by transmitting a power-on signal through the diagnostic communication. 9. The method according to claim 7 or 8,
Step c) is,
and counting at least one of an injection time and an injection amount of the brake fluid. 10. The method of claim 9,
Step d) is,
when it is determined that the ESC specification is applied to the vehicle, stopping the injection when at least one of the brake fluid injection time and injection amount meets a first reference value set according to the ESC specification; and
A brake fluid injection method comprising the step of performing a top-off of adjusting a brake fluid level in a reserve tank and then terminating the top-off. 11. The method of claim 10,
Step d) is,
stopping the injection when it is determined that the ESC specification is not applied to the vehicle, and when at least one of the brake fluid injection time and injection amount meets a second reference value set according to the ESC specification; and
The brake fluid injection method further comprising the step of terminating after performing a top-off of adjusting the brake fluid level of the reserve tank. 12. The method of claim 11,
In step d),
The brake fluid injection method in which the first reference value set according to the ESC specification is set to shorten the brake fluid injection time compared to the second reference value. In the brake fluid injection method in which an On-Board Diagnostics (OBD) terminal mounted on a vehicle assembled at a factory is interlocked with a brake fluid injection system, the method comprising:
a) connecting the brake fluid injection system and diagnostic communication through an antenna when entering the brake fluid injection process;
b) controlling the vehicle in IG ON mode according to a power ON signal received from the brake fluid injection system to supply power in a non-starting state;
c) confirming the ESC (Electronic Stability Program) specification applied to the HCU (Hydraulic Control Unit) of the vehicle and transmitting it to the brake fluid injection system; and
d) upon receiving a control signal from the brake fluid injection system, controlling the HCU to generate an injection pressure, and at the same time forcibly driving the ESC function to rapidly inject the brake fluid to the four wheels;
A method of injecting brake fluid comprising a.

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