KR100267298B1 - How to control duty of ABS - Google Patents

How to control duty of ABS Download PDF

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Publication number
KR100267298B1
KR100267298B1 KR1019950058594A KR19950058594A KR100267298B1 KR 100267298 B1 KR100267298 B1 KR 100267298B1 KR 1019950058594 A KR1019950058594 A KR 1019950058594A KR 19950058594 A KR19950058594 A KR 19950058594A KR 100267298 B1 KR100267298 B1 KR 100267298B1
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South Korea
Prior art keywords
abs
duty
speed
vehicle
speeds
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KR1019950058594A
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Korean (ko)
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KR970040586A (en
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신기하
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정몽규
현대자동차주식회사
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Priority to KR1019950058594A priority Critical patent/KR100267298B1/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
    • 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
    • B60T8/321—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 deceleration
    • B60T8/329—Systems characterised by their speed sensor arrangements
    • 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
    • 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
    • B60Y2400/303—Speed sensors
    • B60Y2400/3032—Wheel speed sensors
    • 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
    • B60Y2400/81—Braking systems

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

PURPOSE: A duty control method of an ABS brake is provided to reduce the vibration transferred to a shock absorber and a foot brake, by using a duty control map. CONSTITUTION: A step is to input the speed of a vehicle measured by a wheel speed sensor into an ECU. A step is to judge whether the gap of speed(ΔN) between speeds is higher than the control constant value(A) by repetitive mapping test. A step is to carry out the braking mode. A step is to generate and input the ABS duty to the speed of the vehicle. A step is to judge whether the gap of speed is equal or lower than '0'. A step is to release the ABS duty control.

Description

에이비에스의 듀티 제어 방법How to control the duty of ABS

제1도는 본 발명에 의한 에이비에스의 듀티 제어 방법에 이용되는 장치의 블록도이고,1 is a block diagram of a device used in the duty control method of the ABS according to the present invention,

제2도는 본 발명에 의한 에이비에스의 듀티 제어 방법을 나타낸 동작 순서도이다.2 is an operation flowchart showing the duty control method of the ABS according to the present invention.

본 발명은 에이비에스의 듀티(ABS DUTY) 제어 방법에 관한 것이다.The present invention relates to a method of controlling ABS DUTY.

일반적으로 자동차는 제동시에 감속도에 따라 차량 중심이 전방으로 이동하여 앞바퀴의 하중은 증가하고 뒷바퀴의 하중은 감소하는 경향이 생겨 바퀴가 정지하여 스키드(skid)를 일으키면 노면과의 마찰력이 감소함과 동시에 방향성을 잃게 되어 제동 성능이 저하되고 불안정한 제동이 된다. 이러한 현상을 방지하기 위하여 모든 바퀴에 제동력을 균일하게 하기 위한 것이 에이비에스(ABS) 장치이다.In general, when a vehicle brakes, the center of the vehicle moves forward according to the deceleration, so that the load on the front wheel increases and the load on the rear wheel tends to decrease. When the wheel stops and causes skids, friction with the road surface decreases. At the same time, the direction is lost, resulting in reduced braking performance and unstable braking. In order to prevent this phenomenon, it is the ABS device to make the braking force uniform on all the wheels.

본 발명의 목적은 듀티 저절 맵을 채용하여 ABS를 조절하여 쇽(shock) 및 풋 브레이크 시스템(foot brake system)에 전달되는 진동을 줄이는 데에 있다.An object of the present invention is to reduce the vibrations transmitted to the shock and foot brake system by adjusting the ABS by employing a duty self-map.

이러한 목적을 달성하기 위한 본 발명에 따른 에이비에스의 듀티 제어 방법은,The duty control method of the ABS according to the present invention for achieving this object,

휠 속력 센서에서 측정한 차속을 ECU에 입력하는 단계,Inputting the vehicle speed measured by the wheel speed sensor to the ECU,

차속 Nn, Nn-1, 사이의 속력의 차이 △N이 매핑 가능한 반복적 시험에 의한 조절 상수 값(A) 보다 큰가를 판별하는 단계,Determining whether the difference ΔN of the speeds between the vehicle speeds N n , N n-1 , is greater than the control constant value A by a repeatable test that can be mapped,

브레이킹 모드를 실행하는 단계,Running the breaking mode,

차속에 따른 에이비에스 듀티를 생성하고 출력하는 단계,Generating and outputting an ABS duty according to the vehicle speed,

△N이 '0'보다 작거나 같은가를 판별하는 단계,Determining whether ΔN is less than or equal to '0',

에이비에스 듀티 조절을 해제하는 단계를 포함하는 것을 그 특징으로 한다.And releasing the ABS duty adjustment.

본 발명에 따른 이러한 에이비에스의 듀티 제어 방법에서는 에이비에스 조절 모듈의 제동 입력시 브레이킹 시스템(braking system) 제어가 온(on)과 오프(off)의 타임(time) 제어에서, 휠 속력 센서의 신호에 의한 휠 속력 Nn, Nn-1사이의 속력 차이 △N이 매핑(mapping) 가능한 반복적 시험에 의한 조절 상수 'A'값 보다 클 경우 휠 속력 N에 의한 듀티 조절 맵(control map)을 채용하여 ABS를 조절하여 쇽(shock) 및 풋 브레이크 시스템(foot brake system)에 전달되는 진동을 줄인다.In the duty control method of the ABS according to the present invention, the braking system control at the braking input of the ABS control module in the time control of the on (on) and off (off) time, the signal of the wheel speed sensor Adopt a duty control map by wheel speed N when the speed difference ΔN between wheel speeds N n and N n-1 is greater than the control constant 'A' value by repetitive test that can be mapped. ABS is adjusted to reduce the vibrations transmitted to the shock and foot brake system.

이하, 첨부된 도면을 참조하여 본 발명에 따른 에이비에스의 듀티 제어 방법의 바람직한 실시예를 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the duty control method of the ABS according to the present invention.

제1도에는 본 발명에 따른 에이비에스의 듀티 제어 방법에 이용되는 장치의 블록도가 도시되어 있다.1 is a block diagram of an apparatus used for the duty control method of the ABS according to the present invention.

도시한 바와 같이, 휠 속력을 측정하는 휠 속력 센서(10)와 휠 속력 센서(10)로부터 신호를 받아 차속에 따른 에이비에스의 듀티를 생성하고 출력하는 ECU(20)가 있다. 또한, ECU(20)로부터 신호를 받아 에이비에스의 듀티를 조절하는 액튜에이터(30)가 있다.As shown in the drawing, there is a wheel speed sensor 10 that measures wheel speed and an ECU 20 that receives signals from the wheel speed sensor 10 to generate and output the duty of the ABS according to the vehicle speed. In addition, there is an actuator 30 that receives a signal from the ECU 20 and adjusts the duty of the ABS.

제2도에는 본 발명에 따른 에이비에스의 듀티의 제어 방법을 나타낸 동작 순서도가 도시되어 있다.2 is an operation flowchart showing a method of controlling the duty of the ABS according to the present invention.

브레이크 페달을 밞으면 ECU가 이를 인지하여 브레이크 제어 모듈이 시작된다.When the brake pedal is released, the ECU recognizes this and starts the brake control module.

제2도에 도시한 바와 같이, 휠 속력 센서(10)에서 측정한 차속을 ECU(20)에 입력한다(S10). 그리고 차속Nn, Nn-1, 사이의 속력의 차이 △N이 매핑 가능한 반복적 시험에 의한 조절 상수 값(A) 보다 큰가를 판별한다(S20). △N이 조절 상수 값보다 크지 않을 경우는 후술하는 제70 단계로 건너뛰고, △N이 조절 상수 값보다 큰 경우는 브레이킹 모드를 실행하고(S30), 휠 속력 △N과 N에 의한 듀티 제어 맵을 채용하여 차속에 따른 에이비에스 듀티를 생성하고 출력한다(S40, S50). 그리고, △N이 '0'보다 작거나 같은가를 판별한다(S60).As shown in FIG. 2, the vehicle speed measured by the wheel speed sensor 10 is input to the ECU 20 (S10). Then, it is determined whether the difference ΔN of the speeds between the vehicle speeds N n , N n-1 , is greater than the control constant value A by the repetitive test that can be mapped (S20). If ΔN is not greater than the adjustment constant value, skip to step 70 to be described later. If ΔN is greater than the adjustment constant value, the braking mode is executed (S30), and the duty control map by the wheel speeds ΔN and N is performed. By employing to generate and output the ABS duty according to the vehicle speed (S40, S50). Then, it is determined whether DELTA N is less than or equal to '0' (S60).

△N이 '0' 보다 작거나 같으면 에이비에스 듀티 조절을 해제한다(S70), 또한 그렇지 않으면, 전술한 바와 같은 단계 S20으로 리턴한다.If ΔN is less than or equal to '0', the ABS duty adjustment is released (S70). Otherwise, the process returns to step S20 as described above.

따라서, 본 발명에 따른 에이비에스의 듀티 제어 방법은 ABS 조절 모듈의 제동 입력시 브레이킹 시스템(braking system) 제어가 온(on)과 오프(off)의 타임(time) 제어에서, 휠 속력 센서의 신호에 의한 휠 속력 Nn, Nn-1사이의 속력 차이 △N이 매핑(mapping) 가능한 반복적 시험에 의한 조절 상수 'A'값 보다 클 경우 휠 속력 N에 의한 듀티 조절 맵(control map)을 채용하여 ABS를 조절하여 쇽(shock) 및 풋 브레이크 시스템(fot brake system)에 전달되는 진동을 줄이는 효과가 있다.Therefore, the duty control method of the ABS according to the present invention is a signal of the wheel speed sensor in the braking system control is on (on) and off (time) time control of the braking input of the ABS control module Adopt a duty control map by wheel speed N when the speed difference ΔN between wheel speeds N n and N n-1 is greater than the control constant 'A' value by repetitive test that can be mapped. By controlling the ABS, vibrations transmitted to the shock and the foot brake system are reduced.

Claims (1)

휠 속력 센서에서 측정한 차속을 ECU에 입력하는 단계,Inputting the vehicle speed measured by the wheel speed sensor to the ECU, 차속 Nn, Nn-1, 사이의 속력의 차이 △N이 매핑 가능한 반복적 시험에 의한 조절 상수 값(A) 보다 큰가를 판별하는 단계,Determining whether the difference ΔN of the speeds between the vehicle speeds N n , N n-1 , is greater than the control constant value A by a repeatable test that can be mapped, 브레이킹 모드를 실행하는 단계,Running the breaking mode, 차속에 따른 에이비에스 듀티를 생성하고 출력하는 단계,Generating and outputting an ABS duty according to the vehicle speed, △N이 '0' 보다 작거나 같은가를 판별하는 단계,Determining whether ΔN is less than or equal to '0', 에이비에스 듀티 조절을 해제하는 단계를 포함하는 것을 특징으로 하는 에이비에스의 듀티 제어 방법.And releasing the ABS duty adjustment.
KR1019950058594A 1995-12-27 1995-12-27 How to control duty of ABS KR100267298B1 (en)

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KR100267298B1 true KR100267298B1 (en) 2000-10-16

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637264A (en) * 1969-03-22 1972-01-25 Teldix Gmbh Antilocking control for pressure actuated brakes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637264A (en) * 1969-03-22 1972-01-25 Teldix Gmbh Antilocking control for pressure actuated brakes

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