KR20130022679A - Brake method of vehicle - Google Patents

Brake method of vehicle Download PDF

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Publication number
KR20130022679A
KR20130022679A KR1020110085456A KR20110085456A KR20130022679A KR 20130022679 A KR20130022679 A KR 20130022679A KR 1020110085456 A KR1020110085456 A KR 1020110085456A KR 20110085456 A KR20110085456 A KR 20110085456A KR 20130022679 A KR20130022679 A KR 20130022679A
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KR
South Korea
Prior art keywords
auxiliary
pipe
valve
cylinder
vehicle
Prior art date
Application number
KR1020110085456A
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Korean (ko)
Inventor
정재훈
박성준
Original Assignee
현대모비스 주식회사
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Priority to KR1020110085456A priority Critical patent/KR20130022679A/en
Publication of KR20130022679A publication Critical patent/KR20130022679A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/148—Arrangements for pressure supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1755—Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4018—Pump units characterised by their drive mechanisms
    • B60T8/4022—Pump units driven by an individual electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/306—Pressure sensors

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The present invention relates to a braking method for a vehicle, comprising: inputting a vehicle control signal; And driving the auxiliary hydraulic part.
The braking method for automobiles according to the present invention enables the control of the wheel cylinder part by rapidly increasing the hydraulic pressure of the braking fluid by the auxiliary hydraulic part.

Figure P1020110085456

Description

Braking method for automobiles {BRAKE METHOD OF VEHICLE}

The present invention relates to a braking method for a vehicle, and more particularly, to a braking method for a vehicle that can be used in a commercial vehicle by doubling the hydraulic pressure of the braking device used in a passenger car.

In general, an automobile braking device provides a braking force to a wheel to induce a vehicle to stably travel.

Electronic Stability Control (ESC) is a system that stabilizes the behavior of a vehicle by generating a braking force using hydraulic pressure when the vehicle tries to exceed the limit performance when turning.

1 is a view schematically showing a conventional brake device for a vehicle.

Referring to FIG. 1, a braking device 1 for a vehicle is provided with a master cylinder 2 and a wheel cylinder 3.

A hydraulic pipe 4 is provided between the master cylinder 2 and the wheel cylinder 3 to guide the hydraulic pressure amplified by the master cylinder 2 to the wheel cylinder 3.

On the other hand, the hydraulic pipe 4 is provided with a pump 6 driven by the motor 5. Therefore, when braking the wheel cylinder 3 for the attitude control of the passenger car, the hydraulic pressure is amplified in the pump 6 to reach the wheel cylinder 3.

The accumulator 7 forms a space in which the braking fluid of the master cylinder 2 is temporarily stored.

When the conventional automobile brake system is used in a commercial vehicle such as a large bus, there is a problem in that the pressure required for the wheel cylinder is not reached quickly due to the lack of master cylinder performance and the length of the hydraulic tube.

Therefore, there is a need to improve this.

An object of the present invention is to provide a braking method for a vehicle in which a hydraulic pressure required for a wheel cylinder is quickly reached by receiving insufficient hydraulic pressure through a power steering oil press.

In order to achieve the above object, the present invention comprises the steps of inputting a vehicle control signal; And it provides a vehicle braking method comprising the step of driving the auxiliary hydraulic unit.

The driving of the auxiliary hydraulic part may include setting data; Driving the auxiliary pump unit according to the data; And controlling the second auxiliary valve and the third auxiliary valve to open and close the second auxiliary pipe and the third auxiliary pipe according to the data.

The setting of the data may include measuring a pressure and a flow rate of the auxiliary pump unit; Measuring a change amount of the second sub-valve and the third sub-valve according to a change in the current value; Measuring an amount of pressure change according to the amount of movement of the auxiliary cylinder; And calculating current values of the second sub-valve and the third sub-valve according to the pressure change required in the wheel cylinder.

In order to achieve the above object, the present invention comprises the steps of inputting a vehicle control signal; Driving the auxiliary hydraulic part; Measuring the pressure of the wheel cylinder; And determining whether the pressure of the wheel cylinder portion is equal to the set value, and if the pressure of the wheel cylinder portion does not reach the set value, returning to driving the auxiliary hydraulic part. Provide the device.

The driving of the auxiliary hydraulic part may include driving an auxiliary pump part; And controlling the second auxiliary valve and the third auxiliary valve to open and close the second auxiliary pipe and the third auxiliary pipe.

The braking method for a vehicle according to the present invention has the effect that the braking fluid is rapidly increased by the auxiliary hydraulic part to reach the wheel cylinder part.

Therefore, even in a commercial vehicle such as a large bus, even when the master cylinder performance is insufficient or the pumping force limit occurs in the pump portion, it is possible to quickly supply the necessary pressure to the wheel cylinder portion.

1 is a view schematically showing a conventional brake device for a vehicle.
2 is a view schematically showing a braking device for a vehicle according to an embodiment of the present invention.
3 is a view schematically showing the auxiliary cylinder in the brake device for a vehicle according to an embodiment of the present invention.
4 is a view schematically showing a state in which the auxiliary cylinder portion is boosted by the auxiliary fluid in the brake device for a vehicle according to an embodiment of the present invention.
5 is a flow chart schematically showing a braking method for a vehicle according to a first embodiment of the present invention.
6 is a flowchart schematically illustrating a method of driving an auxiliary hydraulic part in FIG. 5.
FIG. 7 is a flowchart schematically illustrating a data setting method for driving an auxiliary hydraulic part in FIG. 6.
8 is a flowchart schematically illustrating a braking method for a vehicle according to a second exemplary embodiment of the present invention.
FIG. 9 is a flowchart schematically illustrating a method of driving an auxiliary hydraulic part in FIG. 8.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a vehicle braking method according to the present invention. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

2 is a view schematically showing a braking device for a vehicle according to an embodiment of the present invention, FIG. 3 is a view schematically showing an auxiliary cylinder part in a braking device for a vehicle according to an embodiment of the present invention, FIG. In the brake system for a vehicle according to an embodiment of the present invention, a view schematically illustrating a state in which an auxiliary cylinder part is boosted by an auxiliary fluid.

5 is a flowchart schematically illustrating a braking method for a vehicle according to a first exemplary embodiment of the present invention, FIG. 6 is a flowchart schematically illustrating a method of driving an auxiliary hydraulic part in FIG. 5, and FIG. 7 is an auxiliary hydraulic pressure in FIG. 6. A flowchart schematically illustrating a data setting method for sub-drive.

8 is a flowchart schematically illustrating a braking method for a vehicle according to a second exemplary embodiment of the present invention, and FIG. 9 is a flowchart schematically illustrating a method of driving an auxiliary hydraulic part in FIG. 8.

2 to 4, the brake device for a vehicle 100 according to an embodiment of the present invention includes a master cylinder part 10, a wheel cylinder part 20, a hydraulic pipe part 30, and a pump part 40. And an auxiliary hydraulic part 50 is provided.

The master cylinder portion 10 supplies a braking fluid in response to the displacement of the pedal for braking.

The wheel cylinder portion 20 is mounted to each wheel to provide braking force to four wheels including a plurality of wheels, typically front and rear wheels.

The hydraulic pipe part 30 guides the braking fluid supplied from the master cylinder part 10 to the wheel cylinder part 20. In this case, brake oil is used as the braking fluid.

The pump unit 40 is provided in the hydraulic pipe unit 30 and driven by the motor 41 to pump the braking fluid. By the driving of the pump 40, the braking fluid stored in the master cylinder 10 may be moved to the wheel cylinder 20 even though the brake pedal is not operated. The pump unit 40 is composed of a plurality.

The auxiliary hydraulic part 50 is connected to the hydraulic pipe part 30. The auxiliary hydraulic part 50 provides the hydraulic pressure generated by the auxiliary fluid to the hydraulic pipe part 30.

The hydraulic pipe part 30 according to an embodiment of the present invention is provided with a first pipe 31, a second pipe 32, a third pipe 33, a fourth pipe 34, and a fifth pipe 35. do.

One end of the first pipe 31 is connected to the master cylinder (10). The first pipe 31 is provided with a first valve 31a to open and close the first pipe 31.

The first pipe 31 is a pair is connected to the master cylinder portion 10, respectively, the second pipe 32 to the fifth pipe 35 is connected to each of the first pipe 31 guides the braking fluid. . Since the arrangement of the first tube 31 to the fifth tube 35 is the same, the following describes the second tube 32 to the fifth tube 32 associated with one first tube 31. do.

The second pipe 32 branches off from the other end of the first pipe 31. One end of the second pipe 32 is connected to the first pipe 31 and the other end of the second pipe 32 is connected to the accumulator part 60 temporarily storing the braking fluid.

The second pipe 32 is provided with a pump 40 for pumping the braking fluid stored in the master cylinder 10 and a second valve 32a for opening and closing the second pipe 32.

The third tube 33 is connected to the second tube 32. The third pipe 33 is connected to the second pipe 32 located between the second valve 32a and the pump unit 40.

The fourth pipe 34 has one end connected to the third pipe 33 and the other end connected to the wheel cylinder 20. The fourth pipe 34 is composed of a plurality of so as to be connected to the wheel cylinder portion 20 is mounted to each of the plurality of wheels. The fourth valve 34a provided in the fourth pipe 34 opens and closes the fourth pipe 34.

The fifth pipe 35 has one end connected to the fourth pipe 34 and the other end connected to the second pipe 32. The fifth pipe 35 is connected to each of the fourth pipe 34, the fifth valve 35a provided in the fifth pipe 35 opens and closes the fifth pipe (35). The plurality of fifth pipes 35 may converge with each other and be connected to the second pipes 32.

The opening and closing amounts of the first valve 31a, the second valve 32a, the fourth valve 34a and the fifth valve 35a are controlled by the control unit. The control unit detects the rotation state of the wheel, adjusts the valve opening and closing amount, and controls the driving of the pump unit 40 and the motor 41.

The auxiliary hydraulic part 50 is connected to the third pipe 33. The auxiliary hydraulic part 50 is connected to the third pipe 33 to increase the hydraulic pressure of the braking fluid.

Therefore, when the hydraulic pressure of the wheel cylinder portion 20 of a large commercial vehicle such as a bus is required quickly, the hydraulic pressure of the braking fluid is increased by the pump portion 40 and the auxiliary hydraulic portion 50 to quickly the wheel cylinder 20. Is moved.

On the other hand, the second pipe 32 is provided with a check valve 32b. The check valve 32b is located in the second pipe 32 corresponding between the connection point with the first pipe 31 and the connection point with the fifth pipe 35.

The check valve 32b controls the flow rate sucked from the wheel cylinder 20 to prevent brake pedal slippage, and the brake oil of the master cylinder 10 enters the accumulator 60 during brake operation by the pedal. It blocks and controls the opening pressure of the suction port section of the pump unit 40.

In the auxiliary hydraulic part 50 according to an embodiment of the present invention, the first auxiliary pipe 51 to the fourth auxiliary pipe 54, the auxiliary tank part 55, the auxiliary pump part 56, and the auxiliary cylinder part 57 ) Is provided.

The auxiliary tank unit 55 includes an auxiliary fluid. As the auxiliary tank unit 55, a power steering oil press is used.

The power steering oil presser adjusts the direction of the wheel, and the driver changes the direction of the wheel using less force through the power steering oil press.

The auxiliary tank unit 55 may be a tank in which the power steering oil is stored, and may be a transfer pipe for power steering including the power steering oil.

The auxiliary pump 56 pumps the auxiliary fluid included in the auxiliary tank 55. The auxiliary pump 56 is driven by the control unit to forcibly transfer the auxiliary fluid.

The auxiliary cylinder 57 is connected to the hydraulic pipe part 30 to provide hydraulic pressure of the auxiliary fluid to the hydraulic pipe part 30.

Accordingly, the braking fluid of the hydraulic pipe part 30 is rapidly increased by the pump part 40 and the auxiliary cylinder part 57 and moved to the wheel cylinder part 20.

One end of the first auxiliary pipe 51 is connected to the auxiliary tank 55, and the other end of the first auxiliary pipe 51 is connected to the auxiliary pump 56. The first auxiliary pipe 51 guides the auxiliary fluid included in the hydraulic power steering unit to the auxiliary pump unit 56.

One end of the second auxiliary pipe 52 is connected to the auxiliary pump 56, and the other end of the second auxiliary pipe 52 is connected to the auxiliary cylinder 57. The second auxiliary pipe 52 transfers the hydraulic pressure of the auxiliary fluid generated by the auxiliary pump part 56 to the auxiliary cylinder 57.

The second auxiliary pipe 52 is provided with a second auxiliary valve 52a which is driven by the controller to open and close the second auxiliary pipe 52.

One end of the third auxiliary pipe 53 is connected to the second auxiliary pipe 52, and the other end of the third auxiliary pipe 53 is connected to the auxiliary tank 55. The third auxiliary pipe 53 guides the auxiliary fluid to the auxiliary tank part 55 to prevent the loss of the auxiliary fluid in the auxiliary tank part 55.

The third auxiliary pipe 53 is provided with a third auxiliary valve 53a which is driven by the controller to open and close the third auxiliary pipe 53.

One end of the fourth auxiliary pipe 54 is connected to the auxiliary cylinder 57, and the other end thereof is connected to the hydraulic pipe part 30. The fourth auxiliary pipe 54 transmits the hydraulic pressure of the auxiliary fluid generated in the auxiliary hydraulic part 50 to the hydraulic pipe part 30.

The auxiliary cylinder unit 57 according to an embodiment of the present invention includes an auxiliary cylinder 573, a first auxiliary piston 571, a second auxiliary piston 572, and an auxiliary connection bar 577.

One end of the auxiliary cylinder 573 is connected to the second auxiliary pipe 52, and the other end is connected to the fourth auxiliary pipe 54. An auxiliary fluid flows into one end of the auxiliary cylinder 573, and a braking fluid flows into the other end of the auxiliary cylinder 573.

The first auxiliary piston 571 is embedded in the auxiliary cylinder 573 and is moved inside the auxiliary cylinder 573. The first auxiliary piston 571 is positioned at one end of the auxiliary cylinder 573 and is moved in the direction of the second auxiliary piston 572 by the hydraulic pressure of the auxiliary fluid supplied through the second auxiliary pipe 52.

The second auxiliary piston 572 is embedded in the auxiliary cylinder 573 and is moved inside the auxiliary cylinder 573. The second auxiliary piston 572 is located at the other end of the auxiliary cylinder 573 and is spaced apart from the first auxiliary piston 571.

Both ends of the auxiliary connecting bar 577 are connected to the first auxiliary piston 571 and the second auxiliary piston 572, respectively.

Therefore, when the first auxiliary piston 571 is moved in the direction of the second auxiliary piston 572, the second auxiliary piston 572 is moved in the direction of the fourth auxiliary pipe 54 to increase the hydraulic pressure of the braking fluid.

The auxiliary cylinder portion 57 according to an embodiment of the present invention is further provided with an auxiliary elastic body 575 for elastically supporting the second auxiliary piston 572.

The auxiliary elastic body 575 is positioned between the other end of the auxiliary cylinder 573 and the second auxiliary piston 572 and is contracted as the second auxiliary piston 572 is moved in the direction of the fourth auxiliary pipe 54. .

When the driving of the auxiliary pump 56 is stopped, the hydraulic pressure applied to the first auxiliary piston 571 is removed. Then, the auxiliary elastic body 575 is expanded by the restoring force to return the second auxiliary piston 572 to its original state.

When the second auxiliary piston 572 is returned to its original state, the first auxiliary piston 571 connected thereto is returned to its original state.

Auxiliary cylinder portion 57 according to an embodiment of the present invention is further provided with a discharge pipe (576). The discharge pipe 576 is connected to an auxiliary cylinder 573 positioned between the first auxiliary piston 571 and the second auxiliary piston 572.

The discharge pipe 576 guides the auxiliary fluid leaked from the first auxiliary piston 571 to be discharged to the outside of the auxiliary cylinder 57, and the braking fluid leaked from the second auxiliary piston 572 is the auxiliary cylinder 57. Guide it out to the outside.

The discharge pipe 576 prevents the braking fluid from being mixed with the auxiliary fluid of the auxiliary hydraulic part 50 and prevents the auxiliary fluid from being mixed with the braking fluid of the hydraulic pipe part 30.

Meanwhile, a master sensor 11 is provided in the first tube 31 and a wheel sensor 21 is provided in the fourth tube 34 for controlling the vehicle.

The master sensor 11 measures the oil pressure of the braking fluid according to the operation of the master cylinder unit 10, and the wheel sensor 21 measures the oil pressure of the braking fluid with respect to the wheel cylinder unit 20.

Referring to the operation of the braking device for a vehicle according to an embodiment of the present invention having the above structure as follows.

The auxiliary hydraulic part 50 is provided in the hydraulic pipe part 30 which connects the master cylinder part 10 and each wheel cylinder part 20 to guide the braking fluid. The auxiliary hydraulic part 50 includes an auxiliary fluid for power steering.

In the above state, if a fast braking force is required for each wheel cylinder unit 20 for the vehicle attitude control, the braking fluid stored in the master cylinder unit 10 is driven by the driving of the pump unit 40 by the motor 41. It moves to the 2nd pipe 32 through the 1st pipe 31 opened by the 1st valve 31a. At this time, the second valve 32a closes the second pipe 32.

The braking fluid introduced into the second pipe 32 is moved to the fourth pipe 34 connected to each wheel cylinder 20 through the third pipe 33, and to each of the plurality of fourth pipes 34. The fourth valve 34a provided separately opens the braking fluid to the wheel cylinder 20.

For example, when the braking fluid is supplied to the wheel cylinder 20 of the front right wheel, the fourth valve 34a of the fourth pipe 34 connected to the wheel cylinder 20 of the right front wheel opens. The braking fluid reaches the wheel cylinder 20 of the front wheel right wheel.

When the braking fluid is not supplied to the wheel cylinder 20 of the left wheel of the front wheel, the fourth valve 34a of the fourth pipe 34 connected to the wheel cylinder 20 of the front wheel of the left wheel is closed so that the braking fluid is closed. It does not reach the wheel cylinder 20 of the front wheel left wheel.

At this time, when the hydraulic pressure is excessively supplied to the wheel cylinder 20, the fifth valve 35a of the fifth pipe 35 is opened by the control of the control unit and the braking fluid is temporarily stored in the accumulator unit 60. .

On the other hand, the auxiliary hydraulic part 50 increases the hydraulic pressure of the braking fluid moved to the third pipe 33, the distance between the master cylinder portion 10 and the wheel cylinder portion 20 in a large commercial vehicle such as a bus is considerable Even if the hydraulic pressure is quickly reached to each wheel cylinder portion 20 to solve the shortage of the braking fluid.

Referring to the operation of the auxiliary hydraulic unit 50 schematically as follows.

When the auxiliary pump 56 is driven by the control signal of the controller, the auxiliary fluid included in the auxiliary tank 55 is moved from the first auxiliary pipe 51 to the second auxiliary pipe 52. At this time, the second auxiliary valve 52a is opened, and the third auxiliary valve 53a is closed.

The auxiliary fluid passing through the auxiliary pump 56 is moved to the auxiliary cylinder 57 to pressurize the first auxiliary piston 571.

When the first auxiliary piston 571 is moved in the direction of the second auxiliary piston 572 due to the pressurization of the auxiliary fluid, the second auxiliary piston 572 connected thereto contracts the auxiliary elastic body 575 and the fourth auxiliary pipe 54. Compresses the braking fluid in.

Since the braking fluid compressed in the fourth auxiliary pipe 54 is moved to the third pipe 33 and mixed with the braking fluid compressed by the pump 40, the braking fluid ultimately causes the pump 40 and the auxiliary hydraulic pressure. The hydraulic pressure is increased by the portion 50 to reach the wheel cylinder portion 20.

When the driving of the auxiliary pump 56 is stopped, the second auxiliary piston 572 is returned to its original position by the auxiliary elastic body 575, and is connected to the second auxiliary piston 572 by the auxiliary connecting bar 577. One auxiliary piston 571 is returned to its original position. At this time, the second auxiliary valve 52a is closed and the third auxiliary valve 53a is opened so that the auxiliary fluid is moved to the auxiliary tank part 55.

Meanwhile, referring to FIGS. 5 to 9, a braking method for a vehicle according to the above-described configuration will be described.

The braking method for a vehicle according to the first embodiment of the present invention includes the step of inputting a vehicle control signal (S110) and driving the auxiliary hydraulic part 50 (S120) (see FIG. 5).

In the step S110 of inputting a vehicle control signal, the controller controls a vehicle dynamic control (VDC) to improve the stability of the vehicle's turning, and a TCS (TCS) to prevent idle tires when starting or speeding the vehicle. Recognize driving for vehicle control.

In this case, the control unit may be made separately from the microcomputer for controlling the vehicle, or may include a microcomputer for controlling the vehicle in one control unit.

The control unit drives the auxiliary hydraulic part 50 after inputting the vehicle control signal (S120). When the auxiliary hydraulic part 50 is driven, the first and second auxiliary pistons 571 and 572 of the auxiliary cylinder part 57 are moved to compress the braking fluid stored in the fourth auxiliary pipe 54, so that the wheel cylinder part ( The hydraulic pressure of the braking fluid reached 20 is increased.

In order to drive the auxiliary hydraulic unit 50, first, data is set (S121), and the controller drives the auxiliary pump unit 56 according to the set data (S122), and the second auxiliary valve 52a and the third auxiliary valve. The valve 53a is driven (S123) (see FIG. 6).

When the auxiliary pump 56 is driven according to the set data, the auxiliary fluid stored in the auxiliary tank 55 is pumped and transferred to the auxiliary cylinder 57 through the second auxiliary pipe 52.

At this time, the second auxiliary valve 52a for closing the second auxiliary pipe 52 opens the second auxiliary pipe 52 under the control of the controller, and the third auxiliary valve opening the third auxiliary pipe 53. 53a closes the 3rd auxiliary pipe 52 under control of a control part. As a result, the hydraulic pressure of the auxiliary fluid is increased to pressurize the auxiliary cylinder 57.

On the other hand, in order to set the data (S111), first, the pressure and the flow rate of the auxiliary pump unit 56 is measured (S131), and the second auxiliary valve 52a and the third auxiliary valve 53a according to the current value change. After measuring the change amount (S132) and measuring the pressure change amount according to the movement amount of the auxiliary cylinder portion 57 (S133), the second auxiliary valve 52a and the third according to the pressure change required for the wheel cylinder portion 20 The current value of the auxiliary valve 53a is calculated (S134) (see FIG. 7).

In the step S131 of measuring the pressure and flow rate of the auxiliary pump 56, the pressure and flow rate at which the auxiliary fluid is pumped when the auxiliary pump is driven are measured. The pressure and flow rate of the auxiliary pump 56 may be obtained through continuous experiments or specifications of the auxiliary pump 56.

In the step S132 of measuring the change amount of the second auxiliary valve 52a and the third auxiliary valve 53a, the second auxiliary valve 52a and the third auxiliary valve 53a are supplied according to the current value supplied to the second auxiliary valve 52a and the third auxiliary valve 53a. The opening and closing amounts of the pipe 52 and the third auxiliary pipe 53 are measured.

The opening and closing amount of the second subsidiary valve 52a and the third subsidiary valve 53a may be obtained through continuous experiments or through specifications of the second subsidiary valve 52a and the third subsidiary valve 53a.

In step S133, the pressure change amount according to the movement amount of the auxiliary cylinder 57 is moved by the auxiliary fluid pumped by the auxiliary pump 56 and the second auxiliary piston 572 moved by the auxiliary fluid. By the movement of 572, the pressure change amount of the braking fluid stored in the fourth auxiliary pipe 54 or the pressure change amount of the braking fluid transmitted to the wheel cylinder 20 is measured (see FIGS. 3 and 4).

In calculating the current values of the second auxiliary valve 52a and the third auxiliary valve 53a according to the pressure change required for the wheel cylinder 20 (S134), when the vehicle control signal is input, the master cylinder part 10 Or the braking hydraulic pressure supplied to the wheel cylinder unit 20 by the pump unit 40 and the braking hydraulic pressure required for the wheel cylinder unit 20 for controlling the vehicle, and is further supplied to the wheel cylinder unit 20. The current value of the second auxiliary valve 52a and the third auxiliary valve 53a is calculated in order to obtain a braking hydraulic pressure to be performed.

The braking method for a vehicle according to the second embodiment of the present invention includes the steps of inputting a vehicle control signal (S210), driving the auxiliary hydraulic part 50 (S220), and measuring the pressure of the wheel cylinder part 20. Step S230 and determining whether the pressure of the wheel cylinder unit 20 and the set value are the same (S240) (see FIG. 8).

In step S210 of inputting a vehicle control signal, the controller controls a vehicle dynamic control (VDC) to improve turning stability of the vehicle, and a TCS (TCS) to prevent idle tires when starting or speeding the vehicle. Recognize driving for vehicle control.

In this case, the control unit may be made separately from the microcomputer for controlling the vehicle, or may include a microcomputer for controlling the vehicle in one control unit.

The control unit drives the auxiliary hydraulic unit 50 after inputting the vehicle control signal (S220). When the auxiliary hydraulic part 50 is driven, the first and second auxiliary pistons 571 and 572 of the auxiliary cylinder part 57 are moved to compress the braking fluid stored in the fourth auxiliary pipe 54, so that the wheel cylinder part ( The hydraulic pressure of the braking fluid reached 20 is increased.

In step S230 of measuring the pressure of the wheel cylinder unit 20, the wheel sensor 21 provided in the fourth pipe 34 detects the braking hydraulic pressure supplied to the wheel cylinder unit 20 and transmits it to the controller. In this case, the wheel sensor 21 may be built in the wheel cylinder 20.

In step S240 of determining whether the pressure of the wheel cylinder unit 20 and the set value are the same, the controller controls the actual braking fluid pressure of the wheel cylinder unit 20 received through the wheel sensor 21 and the vehicle control signal. It is set through, and compares the pressure of the braking fluid required for the wheel cylinder 20.

If the pressure of the wheel cylinder unit 20 does not reach the set value, the control unit 110 returns to the step S220 of driving the auxiliary hydraulic unit 50 to adjust the hydraulic pressure of the braking fluid reaching the wheel cylinder unit 20. .

For example, if the pressure of the wheel cylinder 20 is less than the set value, the hydraulic pressure of the auxiliary fluid is increased by adjusting the auxiliary pump 56, the second auxiliary valve 52a and the third auxiliary valve 53a. Let's do it.

On the other hand, when the pressure of the wheel cylinder portion 20 is higher than the set value, the hydraulic pressure of the auxiliary fluid is reduced by adjusting the auxiliary pump 56, the second auxiliary valve 52a and the third auxiliary valve 53a.

Meanwhile, in order to drive the auxiliary hydraulic part 50, the control unit drives the auxiliary pump part 56 (S221), and drives the second auxiliary valve 52a and the third auxiliary valve 53a (S222) ( 9).

When the auxiliary pump 56 is driven, the auxiliary fluid stored in the auxiliary tank 55 is pumped and transferred to the auxiliary cylinder 57 through the second auxiliary pipe 52.

At this time, the second auxiliary valve 52a for closing the second auxiliary pipe 52 opens the second auxiliary pipe 52 under the control of the controller, and the third auxiliary valve opening the third auxiliary pipe 53. 53a closes the 3rd auxiliary pipe 52 under control of a control part. As a result, the hydraulic pressure of the auxiliary fluid is increased to pressurize the auxiliary cylinder 57.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.

Therefore, the true technical protection scope of the present invention will be defined by the claims below.

10: master cylinder unit 11: master sensor
20: wheel cylinder 21: wheel sensor
30: hydraulic pipe part 31: the first pipe
32: Hall 2 33: Hall 3
34: Hall 4 35: Hall 5
40: pump portion 50: auxiliary hydraulic portion
51: first assistant 52: second assistant
53: third assistant officer 54: fourth assistant officer
55: auxiliary tank part 56; Auxiliary Pump
57: auxiliary cylinder portion 571: first auxiliary piston
572: 2nd auxiliary piston 573: auxiliary cylinder

Claims (5)

Inputting a vehicle control signal; And
A braking method for a vehicle comprising the step of driving the auxiliary hydraulic part. The method of claim 1, wherein the driving of the auxiliary hydraulic part
Setting data;
Driving the auxiliary pump unit according to the data; And
And controlling the second auxiliary valve and the third auxiliary valve to open and close the second auxiliary tube and the third auxiliary tube according to the data. The method of claim 2, wherein the setting of the data comprises
Measuring the pressure and flow rate of the auxiliary pump;
Measuring a change amount of the second sub-valve and the third sub-valve according to a change in the current value;
Measuring an amount of pressure change according to the amount of movement of the auxiliary cylinder; And
And calculating current values of the second sub-valve and the third sub-valve according to a pressure change required in a wheel cylinder. Inputting a vehicle control signal;
Driving the auxiliary hydraulic part;
Measuring the pressure of the wheel cylinder; And
Determining whether or not the pressure and the set value of the wheel cylinder are equal to each other;
And if the pressure of the wheel cylinder portion does not reach a set value, returning to driving the auxiliary hydraulic portion. The method of claim 4, wherein the driving of the auxiliary hydraulic part
Driving the auxiliary pump unit; And
And controlling the second auxiliary valve and the third auxiliary valve to open and close the second auxiliary pipe and the third auxiliary pipe.

KR1020110085456A 2011-08-26 2011-08-26 Brake method of vehicle KR20130022679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110085456A KR20130022679A (en) 2011-08-26 2011-08-26 Brake method of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110085456A KR20130022679A (en) 2011-08-26 2011-08-26 Brake method of vehicle

Publications (1)

Publication Number Publication Date
KR20130022679A true KR20130022679A (en) 2013-03-07

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KR1020110085456A KR20130022679A (en) 2011-08-26 2011-08-26 Brake method of vehicle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114379521A (en) * 2020-10-22 2022-04-22 大陆泰密克汽车系统（上海）有限公司 Brake system, vehicle, and control method for brake system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114379521A (en) * 2020-10-22 2022-04-22 大陆泰密克汽车系统（上海）有限公司 Brake system, vehicle, and control method for brake system
CN114379521B (en) * 2020-10-22 2024-06-07 大陆泰密克汽车系统（上海）有限公司 Brake system, vehicle and control method for brake system

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