KR20020047550A - A device for improving brake stability of ABS - Google Patents

A device for improving brake stability of ABS Download PDF

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Publication number
KR20020047550A
KR20020047550A KR1020000076032A KR20000076032A KR20020047550A KR 20020047550 A KR20020047550 A KR 20020047550A KR 1020000076032 A KR1020000076032 A KR 1020000076032A KR 20000076032 A KR20000076032 A KR 20000076032A KR 20020047550 A KR20020047550 A KR 20020047550A
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KR
South Korea
Prior art keywords
brake
abs
wheel
hydraulic pressure
control unit
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KR1020000076032A
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Korean (ko)
Inventor
양원우
Original Assignee
이계안
현대자동차주식회사
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Priority to KR1020000076032A priority Critical patent/KR20020047550A/en
Publication of KR20020047550A publication Critical patent/KR20020047550A/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
    • 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
    • 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
    • B60T13/741—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 acting on an ultimate actuator
    • 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
    • B60T2250/00—Monitoring, detecting, estimating vehicle conditions
    • B60T2250/03—Vehicle yaw rate
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/10—ABS control systems

Abstract

PURPOSE: A device for improving brake safety of an ABS(Anti-lock Brake System) is provided to remove yawing by dropping brake pressure of a rear wheel. CONSTITUTION: A device for improving brake safety in an anti-lock brake system comprises a brake lamp switch(11) inputting operation of a brake pedal into an ABS electronic control unit(17); a vehicle speed sensor(13) detecting rotational speed of a wheel; a yawing sensor(15) inputting movement of a chassis around a vertical shaft into the ABS electronic control unit; and an ABS actuator(19) decreasing brake hydraulic pressure of a rear wheel. The ABS actuator controls brake force by increasing or decreasing the hydraulic pressure of the brake by being mounted on a pipe connecting a master cylinder and a wheel cylinder. Thereby, the device for improving brake safety in the ABS removes yawing by dropping the brake pressure of the rear wheel.

Description

앤티록브레이크시스템의 제동안정성 개선장치{A device for improving brake stability of ABS}A device for improving brake stability of ABS

본 발명은 앤티록브레이크시스템(ABS)의 제동안정성 개선장치에 관한 것으로, 좀더 상세하게는 앤티록브레이크시스템(ABS) 제동시 요잉(yawing)현상이 발생되면 뒷바퀴의 제동압력을 낮추어 요잉현상을 제거하는 앤티록브레이크시스템(ABS)의 제동안정성 개선장치에 관한 것이다.The present invention relates to a device for improving the qualitative quality of an anti-lock brake system (ABS). More specifically, when yawing occurs during braking of the anti-lock brake system (ABS), the braking pressure of the rear wheel is reduced to remove the yawing phenomenon. The anti-lock brake system (ABS) for a qualitative improvement device.

최근들어, 미끄러운 노면에서 자동차를 제동하여도 차륜이 로킹(locking)되지 않도록 하여 차체의 방향 안정성을 유지하는 앤티록브레이크시스템(ABS)이 개발되어 사용되고 있다.Recently, an anti-lock brake system (ABS) has been developed and used to maintain the directional stability of the vehicle body by preventing the wheels from locking even when the vehicle is braked on a slippery road surface.

즉, 상기 앤티록브레이크시스템(ABS)은 자동차의 제동시에 각 차륜의 휠실린더에 가해지는 브레이크 유압을 감압 또는 증압하여 압력을 조절함으로써 적당한 코너링 포스를 확보하여 조향성을 유지함과 동시에 제동 정지거리가 가장 짧아지는 슬립률이 되도록 제어한다.That is, the anti-lock brake system (ABS) adjusts the pressure by reducing or increasing the brake hydraulic pressure applied to the wheel cylinders of each wheel during braking, thereby securing proper cornering force to maintain steering and at the same time stopping braking stop distance. It is controlled so that the slip ratio becomes shorter.

도 1은 종래 기술에 따른 앤티록브레이크시스템(ABS)의 개략적인 구성도로서, 제동등스위치(1)와, 차륜속도센서(3), ABS 전자제어유니트(5) 및, ABS 액추에이터(7)를 포함하여 구성되어 있다.1 is a schematic configuration diagram of an anti-lock brake system ABS according to the related art, and includes a brake light switch 1, a wheel speed sensor 3, an ABS electronic control unit 5, and an ABS actuator 7. It is configured to include.

상기 제동등스위치(1)는 브레이크페달이 작동되면 '온'되어 브레이크페달이 작동되었음을 상기 ABS 전자제어유니트(5)로 입력하도록 되어 있고, 상기 차륜속도센서(3)는 각 차륜마다 설치되어 각 차륜의 회전속도를 검출하여 상기 ABS 전자제어유니트(5)로 입력하도록 되어 있다.The brake light switch (1) is 'on' when the brake pedal is activated to input to the ABS electronic control unit (5) that the brake pedal is activated, the wheel speed sensor (3) is provided for each wheel to each wheel The rotational speed of the controller is detected and input to the ABS electronic control unit 5.

상기 ABS 전자제어유니트(5)는 상기 제동등스위치(1)가 '온'되면 상기 차륜속도센서(3)로부터의 차륜속도신호에 의해 차체속도를 추측하고 아울러 각 차륜의 회전상황을 감시하여 도로면의 상태에 적합한 최적의 제동력을 얻을 수 있도록 브레이크 유압을 증압 또는 감압하도록 상기 ABS 액추에이터(7)를 제어하도록 되어 있다.The ABS electronic control unit 5 estimates the vehicle speed based on the wheel speed signal from the wheel speed sensor 3 when the brake light switch 1 is 'on', and monitors the rotational state of each wheel. The ABS actuator 7 is controlled to increase or decrease the brake hydraulic pressure so as to obtain an optimum braking force suitable for the state of.

또한, 상기 ABS 액추에이터(7)는 마스터실린더와 휠실린더를 연결하는 배관에 설치되어 상기 ABS 전자제어유니트(5)의 제어에 따라 상기 마스터실린더에서 휠실린더로 공급되는 브레이크 유압을 증압 또는 감압하여 제동력을 제어하도록 되어 있다.In addition, the ABS actuator (7) is installed in the pipe connecting the master cylinder and the wheel cylinder, the braking force by increasing or reducing the brake hydraulic pressure supplied from the master cylinder to the wheel cylinder under the control of the ABS electronic control unit (5) To control.

그러나, 상기한 바와 같은 종래 기술에 따른 앤티록브레이크시스템(ABS)은, 단순히 차륜의 록킹방지기능만을 수행함에 따라 제동중에 요잉현상이 발생되면 이를 방지할 수 없어 제동안정성이 떨어지는 문제점이 있었다.However, the anti-lock brake system (ABS) according to the prior art as described above has a problem in that it is impossible to prevent the yaw phenomenon during braking due to simply performing a locking prevention function of the wheel, thereby preventing deterioration in time.

이에, 본 발명은 상기한 바와 같은 종래의 제 문제점을 해소하기 위해 안출된 것으로, 앤티록브레이크시스템(ABS) 제동시 요잉(yawing)현상이 발생되면 뒷바퀴의 제동압력을 낮추어 요잉현상을 제거함으로써 제동안정성을 향상시킬 수 있는 앤티록브레이크시스템(ABS)의 제동안정성 개선장치를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve the conventional problems as described above, if yawing phenomenon occurs during braking of the anti-lock brake system (ABS) occurs by lowering the braking pressure of the rear wheel to remove the braking phenomenon An object of the present invention is to provide a device for improving qualitative quality of anti-lock brake system (ABS) that can improve stability.

상기한 바와 같은 목적을 달성하기 위한 본 발명에 따른 앤티록브레이크시스템의 제동안정성 개선장치는, 차륜속도에 의해 차체속도를 추측하고 아울러 각 차륜의 회전상황을 감시하여 도로면의 상태에 적합한 최적의 제동력을 얻을 수 있도록 브레이크 유압을 증압 또는 감압하는 앤티록브레이크시스템에 있어서, 브레이크페달이 작동되면 '온'되는 제동등스위치와, 차체의 요잉률(yawing rate)을 검출하는 요잉률센서, 상기 제동등스위치가 '온'된 상태에서 상기 요잉률이 미리 설정된 일정범위를 벗어나면 뒷바퀴측의 브레이크 유압을 감압하도록 제어신호를 출력하는 ABS 전자제어유니트 및, 상기 ABS 전자제어유니트에서 출력된 제어신호에 따라 뒷바퀴측의 브레이크 유압을 감압하는 ABS 액추에이터를 포함하여 구성된 것을 특징으로 한다.In order to achieve the above object, the anti-rust brake system of the anti-lock brake system according to the present invention is suitable for the road surface condition by estimating the body speed based on the wheel speed and monitoring the rotation of each wheel. In an anti-lock brake system for increasing or reducing brake hydraulic pressure to obtain a braking force, a brake light switch that is 'on' when the brake pedal is activated, a yaw rate sensor for detecting a yawing rate of the vehicle body, and the brake light switch ABS electronic control unit for outputting a control signal to reduce the hydraulic pressure of the rear wheel side when the yaw rate is out of a predetermined range in the 'on' state, and the rear wheel according to the control signal output from the ABS electronic control unit It characterized in that it comprises a ABS actuator for reducing the brake hydraulic pressure of the side.

도 1은 일반적인 앤티록브레이크시스템(ABS)의 개략적인 구성도이고,1 is a schematic configuration diagram of a general anti-lock brake system (ABS),

도 2는 본 발명에 따른 앤티록브레이크시스템(ABS)의 제동안정성 개선장치의 개략적인 구성도이다.2 is a schematic configuration diagram of an apparatus for improving qualitative quality of an anti-lock brake system ABS according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

11 : 제동등스위치 13 : 차륜속도센서11: brake light switch 13: wheel speed sensor

15 : 요잉률센서 17 : ABS 전자에어유니트15: yaw rate sensor 17: ABS electronic air unit

19 : ABS 액추에이터19: ABS actuator

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명에 따른 앤티록브레이크시스템(ABS)의 제동안정성 개선장치의 개략적인 구성도로서, 제동등스위치(11)와, 차륜속도센서(13), 요잉률센서(15), ABS 전자제어유니트(17) 및, ABS 액추에이터(19)를 포함하여 구성되어 있다.2 is a schematic configuration diagram of a device for improving qualitative quality of the anti-lock brake system ABS according to the present invention, wherein the brake light switch 11, the wheel speed sensor 13, the yaw rate sensor 15, and ABS electronic control The unit 17 and the ABS actuator 19 are comprised.

상기 제동등스위치(11)는 브레이크페달이 작동되면 '온'되어 브레이크페달이 작동되었음을 상기 ABS 전자제어유니트(17)로 입력하도록 되어 있고, 상기 차륜속도센서(13)는 각 차륜마다 설치되어 각 차륜의 회전속도를 검출하여 상기 ABS 전자제어유니트(17)로 입력하도록 되어 있으며, 상기 요잉률센서(15)는 자동차가 커브를 돌때 차체에 대해 수직인 축(Z축)을 중심으로 일어나는 차체의 움직임 즉, 요잉률(yawing rate)(deg/sec)을 검출하여 상기 ABS 전자제어유니트(17)로 입력하도록 되어 있다.The brake light switch 11 is 'on' when the brake pedal is activated to input to the ABS electronic control unit 17 that the brake pedal has been activated, and the wheel speed sensor 13 is installed for each wheel to provide each wheel. The rotational speed of the vehicle is detected and input to the ABS electronic control unit 17. The yaw rate sensor 15 moves around the axis (Z axis) perpendicular to the vehicle body when the vehicle turns a curve. That is, the yawing rate (deg / sec) is detected and input to the ABS electronic control unit 17.

상기 ABS 전자제어유니트(17)는 상기 제동등스위치(11)가 '온'되면 상기 차륜속도센서(13)로부터의 차륜속도신호에 의해 차체속도를 추측하고 아울러 각 차륜의 회전상황을 감시하여 도로면의 상태에 적합한 최적의 제동력을 얻을 수 있도록 브레이크 유압을 증압 또는 감압하도록 상기 ABS 액추에이터(19)를 제어하는 한편, 상기와 같이 제동제어중에 요잉률센서(15)에 의해 검출된 요잉률이 일정 범위(예를 들어, -4 ∼ +4 deg/sec)를 벗어나면 뒷바퀴측의 브레이크 유압을 감압하도록 상기 ABS 액추에이터(19)를 제어하도록 되어 있다.The ABS electronic control unit 17 estimates the vehicle speed by the wheel speed signal from the wheel speed sensor 13 when the brake light switch 11 is 'on', and monitors the rotation of each wheel. While controlling the ABS actuator 19 to increase or decrease the brake hydraulic pressure so as to obtain an optimum braking force suitable for the state of, the yaw rate detected by the yaw rate sensor 15 during the braking control as described above is in a certain range. (For example, -4 to +4 deg / sec), the ABS actuator 19 is controlled so as to reduce the brake hydraulic pressure on the rear wheel side.

또한, 상기 ABS 액추에이터(19)는 마스터실린더와 휠실린더를 연결하는 배관에 설치되어 상기 ABS 전자제어유니트(5)의 제어에 따라 상기 마스터실린더에서 휠실린더로 공급되는 브레이크 유압을 증압 또는 감압하여 제동력을 제어하도록 되어 있다.In addition, the ABS actuator 19 is installed in the pipe connecting the master cylinder and the wheel cylinder, under the control of the ABS electronic control unit (5) to increase or reduce the brake hydraulic pressure supplied to the wheel cylinder from the master cylinder braking force To control.

상기와 같이 구성된 본 발명에 따른 앤티록브레이크시스템의 제동안정성 개선장치의 작용 및 효과를 상세히 설명하면 다음과 같다.Referring to the operation and effect of the anti-static brake system of the anti-lock brake system according to the present invention configured as described above in detail as follows.

주행중에 운전자가 브레이크페달을 밟으면 제동등스위치(11)가 '온'되고, 이에 따라 ABS 전자제어유니트(17)가 차륜속도센서(13)에 의해 검출된 차륜속도신호에 의해 차체속도를 추측하고 아울러 각 차륜의 회전상황을 감시하여 도로면의 상태에 적합한 최적의 제동력을 얻을 수 있도록 브레이크 유압을 증압 또는 감압하도록 ABS 액추에이터(19)를 제어함으로써 제동력을 제어한다.When the driver presses the brake pedal while driving, the brake light switch 11 is 'on', and accordingly, the ABS electronic control unit 17 estimates the vehicle body speed based on the wheel speed signal detected by the wheel speed sensor 13. The braking force is controlled by controlling the ABS actuator 19 to increase or decrease the brake hydraulic pressure so as to monitor the rotational state of each wheel and obtain an optimum braking force suitable for the state of the road surface.

그리고, 상기와 같이 제동제어중에 요잉률센서(15)에 의해 검출된 요잉률이 일정 범위(예를 들어, -4 ∼ +4 deg/sec)를 벗어나면 상기 ABS 전자제어유니트(17)가 상기 ABS 액추에이터(19)를 제어하여 뒷바퀴측의 브레이크 유압을 감압시킨다.As described above, when the yaw rate detected by the yaw rate sensor 15 during the braking control is out of a predetermined range (for example, -4 to +4 deg / sec), the ABS electronic control unit 17 is The ABS actuator 19 is controlled to reduce the hydraulic pressure of the brake on the rear wheel side.

즉, ABS 제동중에 요잉률이 미리 설정된 일정범위(예를 들어, -4 ∼ +4 deg/sec)내에 있으면 통상적인 ABS 제어를 수행하고, 요잉률이 미리 설정된 일정범위를 벗어나면(요잉률 < -4 deg/sec, 또는 요잉률 > +4 deg/sec) 통상적인 ABS 제어를 수행하면서 단지 뒷바퀴측의 브레이크 유압을 이전 보다 감압시킴으로써 요잉현상을 제거하는 것이다.That is, when the yaw rate is within a predetermined range (for example, -4 to +4 deg / sec) during ABS braking, normal ABS control is performed, and when the yaw rate is out of the preset predetermined range (yaw rate < -4 deg / sec, or yaw rate> +4 deg / sec) Yawing is eliminated by only reducing the brake hydraulic pressure on the rear wheel side than before while performing normal ABS control.

이상에서 설명한 바와 같이 본 발명에 따르면, 앤티록브레이크시스템(ABS)제동시 요잉(yawing)현상이 발생되면 뒷바퀴의 제동압력을 낮추어 요잉현상을 제거함으로써 제동안정성을 향상시킬 수 있는 효과가 있다.As described above, according to the present invention, if yawing occurs when braking the anti-lock brake system (ABS), the braking pressure of the rear wheel may be lowered to remove the yawing phenomenon, thereby improving the determinism during braking.

Claims (2)

차륜속도에 의해 차체속도를 추측하고 아울러 각 차륜의 회전상황을 감시하여 도로면의 상태에 적합한 최적의 제동력을 얻을 수 있도록 브레이크 유압을 증압 또는 감압하는 앤티록브레이크시스템에 있어서,In the anti-lock brake system for estimating the body speed based on the wheel speed and monitoring the rotational state of each wheel to increase or decrease the brake hydraulic pressure so as to obtain an optimum braking force suitable for the condition of the road surface. 브레이크페달이 작동되면 '온'되는 제동등스위치와, 차체의 요잉률(yawing rate)을 검출하는 요잉률센서, 상기 제동등스위치가 '온'된 상태에서 상기 요잉률이 미리 설정된 일정범위를 벗어나면 뒷바퀴측의 브레이크 유압을 감압하도록 제어신호를 출력하는 ABS 전자제어유니트 및, 상기 ABS 전자제어유니트에서 출력된 제어신호에 따라 뒷바퀴측의 브레이크 유압을 감압하는 ABS 액추에이터를 포함하여 구성된 것을 특징으로 하는 앤티록브레이크시스템의 제동안정성 개선장치.A brake light switch that is 'on' when the brake pedal is activated, a yaw rate sensor that detects a yawing rate of the vehicle body, and the rear wheel when the yaw rate is out of a predetermined range while the brake light switch is 'on' An anti-lock is configured to include an ABS electronic control unit for outputting a control signal to reduce the brake hydraulic pressure of the side, and an ABS actuator for reducing the brake hydraulic pressure of the rear wheel according to the control signal output from the ABS electronic control unit Apparatus for improving the quality of brake system. 제 1 항에 있어서,The method of claim 1, 상기 일정범위는, -4 ∼ +4 deg/sec인 것을 특징으로 하는 앤티록브레이크시스템의 제동안정성 개선장치.The constant range is -4 ~ +4 deg / sec, the qualitative improvement device of the anti-lock brake system, characterized in that.
KR1020000076032A 2000-12-13 2000-12-13 A device for improving brake stability of ABS KR20020047550A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2569104A (en) * 2017-11-21 2019-06-12 Haldex Brake Prod Ab Braking system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2569104A (en) * 2017-11-21 2019-06-12 Haldex Brake Prod Ab Braking system
GB2569282A (en) * 2017-11-21 2019-06-19 Haldex Brake Prod Ab Braking system
GB2569104B (en) * 2017-11-21 2023-02-08 Haldex Brake Prod Ab Braking system
US11661040B2 (en) 2017-11-21 2023-05-30 Haldex Brake Products Ab Braking system

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