KR20100094146A - Hybrid brake system - Google Patents

Hybrid brake system Download PDF

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Publication number
KR20100094146A
KR20100094146A KR1020090013436A KR20090013436A KR20100094146A KR 20100094146 A KR20100094146 A KR 20100094146A KR 1020090013436 A KR1020090013436 A KR 1020090013436A KR 20090013436 A KR20090013436 A KR 20090013436A KR 20100094146 A KR20100094146 A KR 20100094146A
Authority
KR
South Korea
Prior art keywords
hydraulic
braking device
master cylinder
braking
pressure
Prior art date
Application number
KR1020090013436A
Other languages
Korean (ko)
Inventor
윤팔주
황용석
Original Assignee
주식회사 만도
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 만도 filed Critical 주식회사 만도
Priority to KR1020090013436A priority Critical patent/KR20100094146A/en
Publication of KR20100094146A publication Critical patent/KR20100094146A/en

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Classifications

    • 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
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • 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
    • B60T13/74—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 electrical assistance or drive
    • 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
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • B60T8/267—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means for hybrid systems with different kind of brakes on different axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/92—Hybrid vehicles
    • 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)
  • Regulating Braking Force (AREA)

Abstract

The present invention relates to a hybrid type braking device having improved braking performance and vehicle mountability and easy maintenance, wherein a hybrid type braking device according to a preferred embodiment of the present invention is a reservoir type. A master cylinder for forming a hydraulic pressure using the brake fluid stored in the engine, a brake pedal connected to an input terminal of the master cylinder to amplify the driver's drag force and transferring the result to the master cylinder, and Hydraulic braking device installed on the front wheel to generate a braking force by the hydraulic pressure, and a hydraulic control device installed between the master cylinder and the hydraulic braking device to adjust the hydraulic pressure supplied to the hydraulic braking device And an electric braking device installed on the rear wheel of the vehicle to generate braking force by the electric motor, and the master cylinder. A pressure sensor connected to the team, a first control unit controlling the electric braking device, and a second provided to collect pressure information from the pressure sensor to control the hydraulic control device and communicate with the first control unit. It includes a control unit.

Description

Hybrid Braking System {HYBRID BRAKE SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid braking device, and more particularly, to a hybrid braking device having improved braking performance and vehicle mountability and easy maintenance.

Conventional vehicle braking devices have generally used hydraulic pressure. When the driver steps on the brake pedal installed in the driver's seat, the driver's response is amplified by the lever principle. This force is again amplified by a booster using a vacuum to form pressure in the master cylinder, and is transmitted to each wheel through the hydraulic pipe and braking is performed. Such a brake system using hydraulic pressure is generally composed of two hydraulic circuits to ensure safety in case of failure. The first of the two hydraulic circuits is connected to the right front wheel and the left rear wheel and the remaining circuits are connected to the left front wheel and the right rear wheel. Alternatively, it is common to connect the first of two hydraulic circuits to two front wheels and the other circuit to two rear wheels. As such, the two circuits are independently configured to enable braking of the vehicle even when one circuit fails. Recently, in order to secure vehicle safety and optimize vehicle performance, an anti-lock brake system (ABS), a traction control system (TCS) and an electronic stability control (ESC) Has been developed and applied to brake systems. The implementation of this advanced function requires a large number of components, such as valves, pumps and sensors, to control the hydraulic pressure in the aforementioned braking system.

Therefore, the conventional braking device causes a cost increase because a large number of parts are required for accurate control, and the structure of the entire system is complicated.

In addition, in the conventional braking device, due to the complexity of the structure, it takes a long time to remove the air and fill the working fluid when mounting the vehicle. That is, there is a problem in that the vehicle wearability is lowered and maintenance is difficult.

The present invention is to solve such a problem, an object of the present invention is to provide a hybrid braking device that is improved in braking performance and vehicle mountability, and easy to maintain.

Hybrid type braking device according to a preferred embodiment of the present invention for achieving this object is a master cylinder for forming a hydraulic pressure by using the brake fluid stored in the reservoir, the driver is connected to the input terminal of the master cylinder A brake pedal that amplifies the pedal force of the vehicle and transmits it to the master cylinder, a hydraulic braking device installed on the front wheel of the vehicle to generate a braking force by hydraulic pressure, and between the master cylinder and the hydraulic braking device. A hydraulic control device installed at the rear side of the vehicle to control the hydraulic pressure supplied to the hydraulic brake device, an electric brake device generated at the rear wheel of the vehicle and generating a braking force by the electric motor, and connected to the outlet end of the master cylinder. A pressure sensor, a first control unit controlling the electric braking device, and pressure information from the pressure sensor. The home controls the hydraulic control device and is adapted to be in communication with the first control unit may include a second control unit.

In addition, the hydraulic control device may be provided with one or more pumps, one or more solenoid valves.

The apparatus may further include a displacement sensor installed on the brake pedal to measure displacement of the brake pedal, and the hydraulic braking device and the electric braking device may be controlled based on information collected from the displacement sensor.

In addition, the hydraulic control device includes a plurality of solenoid valve for controlling the braking hydraulic pressure delivered to the hydraulic braking device, an accumulator for temporarily storing the oil escaped from the hydraulic braking device in the ABS decompression mode, and the oil stored in the accumulator A pump for suctioning and discharging the pump, a shuttle valve installed in the middle of a hydraulic line connecting the hydraulic port of the master cylinder and the suction side of the pump, and a hydraulic valve of the master cylinder; It is provided in the middle of the hydraulic line connecting the outlet side of the pump may be provided with a traction control solenoid valve for opening and closing the hydraulic line.

In the hybrid braking device according to the present invention, the braking performance is improved because the front wheel and the rear wheel are controlled independently.

In addition, in the hybrid braking device according to the present invention, the hydraulic braking structure is applied only to the front wheels, and the electric braking structure is simplified for the rear wheels, thereby simplifying the structure of the entire braking device. This is improved.

In addition, in the hybrid braking device according to the present invention, since the rear wheel to which the electric braking structure is applied does not require the operation of bleeding air or filling the working fluid, the time and effort required for maintenance are reduced. Maintenance is easy.

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

1 is a block diagram of a hybrid braking device according to a preferred embodiment of the present invention.

As shown in FIG. 1, the hybrid brake device according to the present invention includes a master cylinder 12 for forming a hydraulic pressure using brake fluid stored in a reservoir 13, and a master cylinder 12. The brake pedal 11 is connected to the input terminal of the driver to amplify the driver's drag force and transmits it to the master cylinder 12, and the hydraulic pressure is provided at the front wheel of the vehicle to receive the hydraulic pressure formed in the master cylinder 12. Hydraulic brake device is provided between the wheel cylinder for generating a braking force and the master cylinder 12 and the hydraulic braking device 100 to adjust the hydraulic pressure supplied to the hydraulic braking device (100). Hydraulic control device (H), the electric brake device 200 is installed on the rear wheel of the vehicle to generate a braking force by the electric motor, the first control unit 30 for controlling the electric brake device 200, and the hydraulic control Control the device (H) and the first control unit 30 and CAN ( Controller Area Network) is provided with a second control unit 40 capable of communication.

The reservoir 13 storing the brake fluid is provided on the upper side of the master cylinder 12. The reservoir 13 may be integrally assembled to the master cylinder to supply brake fluid directly to the master cylinder 12, and on the other hand, the reservoir 13 is fixedly installed in the engine room of the vehicle separately from the master cylinder 12 so that the master cylinder 12 ) May be connected by hose or pipe.

In general, the master cylinder 12 is composed of two independent pressure generating chambers in order to ensure the minimum safety of the vehicle even in the event of a failure, the hydraulic pressure flowing through the outlet of each pressure generating chamber is passed through the hydraulic control device ( H) flows in.

The brake pedal 11 is equipped with a brake lamp switch (BLS) 22 for detecting whether the brake is operated, and a brake pedal displacement sensor 21 is provided to grasp the driver's willingness to brake. The brake pedal displacement sensor 21 may be configured as a stroke sensor or a rotation angle sensor of a variable resistance type.

The hydraulic braking device 100 is installed on the front wheel of the vehicle and accommodates a disk that rotates together with the wheel of the vehicle, a friction material generating frictional force in contact with the disk, a piston for advancing the friction material to the disk, and a piston to adjust hydraulic pressure. It is composed of a disc brake including a wheel cylinder supplied with hydraulic pressure from the device (H).

Hydraulic control device (H) is a plurality of solenoid valves (51, 52) for controlling the braking hydraulic pressure delivered to the hydraulic braking device 100 side, and the oil from the hydraulic braking device 100 in the ABS decompression mode temporarily stored An accumulator 60, a pump 70 for sucking and discharging oil stored in the accumulator 60, and a hydraulic line connecting the hydraulic port 12a of the master cylinder 12 and the suction side of the pump 70 Traction control is installed in the middle of the valve (53, shuttle valve) to open and close it, and the hydraulic line connecting the hydraulic port 12a of the master cylinder 12 and the outlet side of the pump 70 is installed in the middle of the traction control A solenoid valve 54 is provided.

The plurality of solenoid valves 51 and 52 are divided into a NO type solenoid valve 2a disposed upstream of the hydraulic braking device 100 and an NC type solenoid valve 2b disposed downstream, and a second control unit Controlled by 40. That is, the second control unit 40 detects the vehicle speed through a wheel speed sensor disposed on each wheel side, thereby controlling the opening and closing operations of the respective solenoid valves 51 and 52.

The traction control solenoid valve 54 is normally kept open, and the braking hydraulic pressure generated in the master cylinder 12 is transmitted to the hydraulic braking device 100 during normal braking through the brake pedal 11.

And the accumulator 60 is independently provided in association with the downstream side of the NC-type solenoid valve 52 so that the oil exiting from the hydraulic braking device 100 in the ABS decompression mode is temporarily stored.

In addition, at the inlet end of the hydraulic generating device 100 and the hydraulic braking device 100 of the master cylinder 12 are provided with pressure sensors 28 and 29 for measuring the hydraulic pressure, respectively.

The electric braking device 200 includes an electric motor, a speed reducer that reduces the rotational speed of the electric motor and amplifies the transmitted force, a converter that converts the rotational motion of the electric motor into a linear motion, and pressurizes the disk to provide frictional force. It comprises a friction material for generating a.

The first control unit 30 controls the operation of the electric braking device 200 and is connected to the second control unit 40 through a controller area network (CAN).

The second control unit 40 controls the hydraulic control device (H), the wheel speed sensor 23, the lateral acceleration sensor 24, the longitudinal acceleration sensor (to determine the state of the vehicle and the braking will of the driver) 25), the yaw rate sensor 26, the steering angle sensor 27, the brake pedal displacement sensor 21, and the brake lamp switch 22 are electrically connected.

Hereinafter, an operation according to a preferred embodiment of the present invention will be described.

When the driver steps on the brake pedal 11, the pedal effort is amplified at a predetermined magnification by the principle of the lever and transmitted to the master cylinder 12.

At this time, the braking intention of the driver is primarily transmitted to the second control unit 40 by the brake lamp switch 22 mounted on the brake pedal 11. The first control unit 40 receives displacement and pressure signals from the brake pedal displacement sensor 21 mounted on the brake pedal 11 and the pressure sensor 29 connected to the outlet of the master cylinder 12. Identify my consent. In addition, the wheel speed sensor 23, the lateral acceleration sensor 24, the longitudinal acceleration sensor 25, the yaw rate sensor 26, the steering angle sensor 27 and the pressure sensor 29 receives the signal of the vehicle You will know the speed and behavior of the course.

After grasping the driver's braking intention and the current status of the vehicle, the second control unit 40 provides a hydraulic pressure adjusting device (H) so that an appropriate hydraulic pressure is supplied to the hydraulic braking device 100 mounted on the front wheel of the vehicle. To drive the valves 51, 52, 53, 54.

In addition, the first control unit 30 capable of communicating with the second control unit 40 and the controller area network (CAN) drives the motor of the electric brake device 200 mounted on the rear wheel of the vehicle.

By monitoring the condition of the vehicle in real time, the hydraulic pressure applied to the hydraulic brake device 100 mounted on the front wheel of the vehicle and the voltage applied to the motor of the electric brake device 200 mounted on the rear wheel are controlled to both the front wheel and the rear wheel. Braking force is applied.

Accordingly, the braking performance is improved in the hybrid braking device according to the present invention. Specifically, the front wheels and the rear wheels are hydraulically and electrically controlled independently, so that the braking of the front wheels and the rear wheels may be appropriately performed in a situation. Of course, even if a failure occurs in one of the hydraulic braking device and the electric braking device, the failure does not affect the other one, which helps to improve stability.

In addition, in the hybrid braking device according to the present invention, the hydraulic braking structure is applied only to the front wheels, and the electric braking structure is simplified for the rear wheels, thereby simplifying the structure of the entire braking device. This is improved.

In addition, in the hybrid braking device according to the present invention, since the rear wheel to which the electric braking structure is applied does not require the operation of bleeding air or filling the working fluid, the time and effort required for maintenance are reduced. Maintenance is easy.

Hybrid braking device according to the preferred embodiment described herein is illustrative, it is obvious that the hybrid braking device of the present invention can be variously modified. For example, the flow path and the valve of the hydraulic control device (H) can be variously modified.

1 is a cross-sectional view of an electric disc brake according to a first embodiment of the present invention.

Description of the Related Art [0002]

11: brake pedal 12: master cylinder

13: reservoir 21: displacement sensor

30: first control unit 40: second control unit

100: hydraulic braking device 200: electric braking device

H: Hydraulic Control

Claims (4)

A master cylinder for forming a hydraulic pressure using the brake fluid stored in the reservoir, A brake pedal connected to an input terminal of the master cylinder to amplify a driver's pedal force and transferring the driver's pedal force to the master cylinder;  A hydraulic braking device installed on the front wheel of the vehicle and generating braking force by hydraulic pressure; A hydraulic control device installed between the master cylinder and the hydraulic braking device to adjust a hydraulic pressure supplied to the hydraulic braking device; An electric braking device installed on the rear wheel of the vehicle and generating braking force by an electric motor; A pressure sensor connected to an outlet end of the master cylinder; A first control unit for controlling the electric braking device; And a second control unit configured to collect pressure information from the pressure sensor to control the hydraulic pressure control device and communicate with the first control unit. The method of claim 1, The hydraulic control device is a hybrid braking device, characterized in that it comprises at least one pump, at least one solenoid valve. The method of claim 1, Installed in the brake pedal further includes a displacement sensor for measuring the displacement of the brake pedal, And the hydraulic braking device and the electric braking device are controlled based on the information collected from the displacement sensor. The method according to claim 1, wherein The hydraulic control device includes a plurality of solenoid valves for controlling the braking hydraulic pressure delivered to the hydraulic braking device, an accumulator for temporarily storing oil discharged from the hydraulic braking device in ABS decompression mode, and suctioning oil stored in the accumulator. The pump to discharge the gas, a hydraulic valve connecting the hydraulic port of the master cylinder and the suction side of the pump, a shuttle valve to open and close the hydraulic line, the hydraulic port of the master cylinder and the pump And a traction control solenoid valve installed in the middle of a hydraulic line connecting the outlet side of the hydraulic line to open and close the hydraulic line.
KR1020090013436A 2009-02-18 2009-02-18 Hybrid brake system KR20100094146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090013436A KR20100094146A (en) 2009-02-18 2009-02-18 Hybrid brake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090013436A KR20100094146A (en) 2009-02-18 2009-02-18 Hybrid brake system

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KR20100094146A true KR20100094146A (en) 2010-08-26

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101220406B1 (en) * 2010-11-05 2013-01-11 주식회사 만도 Vehicles hydraulic control apparatus and method of controlling the same
KR101371898B1 (en) * 2012-11-14 2014-03-07 현대자동차주식회사 Brake system and method for brake controlling of hybrid vehicle
KR20160002117A (en) * 2014-06-30 2016-01-07 현대모비스 주식회사 Brake device for vehicle
CN106274873A (en) * 2015-06-01 2017-01-04 莫嘉林 Automobile brake vacuum pump control circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101220406B1 (en) * 2010-11-05 2013-01-11 주식회사 만도 Vehicles hydraulic control apparatus and method of controlling the same
KR101371898B1 (en) * 2012-11-14 2014-03-07 현대자동차주식회사 Brake system and method for brake controlling of hybrid vehicle
KR20160002117A (en) * 2014-06-30 2016-01-07 현대모비스 주식회사 Brake device for vehicle
CN106274873A (en) * 2015-06-01 2017-01-04 莫嘉林 Automobile brake vacuum pump control circuit
CN106274873B (en) * 2015-06-01 2018-10-26 莫嘉林 Automobile brake vacuum pump control circuit

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