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KR20100040358A - Method of estimating temperature for vehicle brake disk - Google Patents

Method of estimating temperature for vehicle brake disk Download PDF

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Publication number
KR20100040358A
KR20100040358A KR1020080099408A KR20080099408A KR20100040358A KR 20100040358 A KR20100040358 A KR 20100040358A KR 1020080099408 A KR1020080099408 A KR 1020080099408A KR 20080099408 A KR20080099408 A KR 20080099408A KR 20100040358 A KR20100040358 A KR 20100040358A
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South Korea
Prior art keywords
temperature
vehicle
disk
brake
wheel speed
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KR1020080099408A
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Korean (ko)
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KR101314773B1 (en
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조영주
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주식회사 만도
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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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/171—Detecting parameters used in the regulation; Measuring values used in the regulation
    • 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
    • B60T8/58—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 responsive to speed and another condition or to plural speed conditions
    • 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
    • B60Y2400/302—Temperature 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
    • B60Y2400/30—Sensors
    • B60Y2400/303—Speed sensors
    • B60Y2400/3032—Wheel speed sensors

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Arrangements (AREA)

Abstract

PURPOSE: A method of estimating temperature of a brake disc for a vehicle is provided to accurately detect fading phenomenon by employing a nonlinear model mode using external temperature to accurately estimate brake disc temperature regardless of season when estimating the brake disc temperature. CONSTITUTION: A method of estimating temperature of a brake disc for a vehicle is as follows. The operation state of a vehicle is determined. If the vehicle is in a braking state, the temperature of the disc mounted on the vehicle is estimated based on the deceleration and wheel speed and external temperature. If not, the temperature of the disc mounted on the vehicle is estimated based on wheel speed and external temperature.

Description

차량용 브레이크 디스크의 온도 추정방법{METHOD OF ESTIMATING TEMPERATURE FOR VEHICLE BRAKE DISK}Method of estimating temperature of vehicle brake discs {METHOD OF ESTIMATING TEMPERATURE FOR VEHICLE BRAKE DISK}

본 발명은 차량용 브레이크 디스크의 온도 추정 방법에 관한 것으로, 더욱 상세하게는 외기온도를 고려하여 차량용 브레이크 디스크의 온도를 추정하는 차량용 브레이크 디스크의 온도 추정 방법에 관한 것이다.The present invention relates to a method for estimating the temperature of a vehicle brake disc, and more particularly, to a method for estimating the temperature of a vehicle brake disc in consideration of the outside air temperature.

일반적으로 브레이크 장치는 주행하는 자동차를 감속 또는 정지시킴과 동시에 주차상태를 유지하기 위해 사용하는 장치로서 운전자가 브레이크 패달을 밟으면 브레이크 오일에 유압이 발생되어 브레이크 실린더 내에 있는 피스톤이 압출되고, 이 피스톤이 압출됨과 더불어 차륜과 일체로 회전되는 디스크에 마찰부재가 압입되어 마찰열을 발생시키게 되며, 이로 인해 제동력이 발생된다.In general, a brake device is used to decelerate or stop a driving car and maintain a parking state. When a driver presses a brake pedal, hydraulic pressure is generated in the brake oil to extrude the piston in the brake cylinder. In addition to the extrusion, the friction member is pressed into the disk that is integrally rotated with the wheel to generate friction heat, thereby generating a braking force.

디스크식 브레이크는 고속 주행시 또는 내리막길 주행 시 브레이크를 반복하여 사용하게 되면 마찰열이 마찰부재에 축정되어 마찰부재의 마찰계수가 저하되고, 이에 따라 운전자의 제동의지가 차량에 제대로 전달되지 못하여 차량의 사고를 유발할 수 있는 페이딩(Fading) 현상이 발생하게 된다.When the disc brake is used repeatedly at high speed or when driving downhill, the frictional heat is accumulated in the friction member, and the friction coefficient of the friction member is reduced. Accordingly, the driver's braking will not be properly transmitted to the vehicle. Fading may occur, which may cause a problem.

종래의 ABS(Anti-lock Brake System)나 ESP(Electronic Stability Program) 에서는 페이딩 현상을 해결하기 위해 브레이크에 온도센서를 장착하여 브레이크의 온도를 측정하여 제어에 이용하거나, ECU(Electronic Control Unit)에서 브레이크의 온도를 추정하여 추정된 온도값을 제어에 이용하였다.In the conventional anti-lock brake system (ABS) or electronic stability program (ESP), a temperature sensor is attached to the brake to solve the fading phenomenon, and the brake temperature is measured and used for control, or the brake is controlled by the ECU (Electronic Control Unit). The estimated temperature value was used for control.

그러나, 브레이크 시스템에 온도 센서를 장착하는 것은 별도의 센서를 추가하고 이에 상응하는 로직이 구비되어야 하므로 제어가 복잡해지고 생산단가가 상승하는 문제가 발생한다. 또한, 종래에 사용하는 브레이크 디스크의 온도추정방법은 초기온도와 현재온도를 각각 추정하여 사용하는데, 이 추정과정에 외기온도에 대한 고려가 없어 추정되는 디스크의 온도가 각 계절별로 부정확해질 수 있다는 문제가 있다.However, the mounting of the temperature sensor in the brake system requires the addition of a separate sensor and corresponding logic, which leads to complicated control and increased production cost. In addition, the conventional method of estimating the temperature of a brake disc estimates and uses the initial temperature and the current temperature, and there is no consideration of the outside temperature in the estimation process, so that the estimated temperature of the disc may be inaccurate for each season. There is.

본 발명은 전술한 문제점을 해결하기 위한 것으로, 본 발명의 목적은 브레이크 디스크의 온도의 추정 시, 외기온도(흡기구온도센서에서 측정)를 이용한 비선형 모델식을 이용하여 계절에 상관없이 디스크의 온도를 정확하게 추정함으로서, 페이딩 현상을 정확히 감지하는 차량용 브레이크 디스크의 온도 추정방법을 제공함에 있다.The present invention is to solve the above problems, an object of the present invention is to estimate the temperature of the disc irrespective of the season using a non-linear model equation using the outside air temperature (measured by the intake air temperature sensor) when estimating the temperature of the brake disc By accurately estimating, the present invention provides a method for estimating a temperature of a brake disc for a vehicle that accurately detects a fading phenomenon.

전술한 목적을 달성하기 위한 본 발명의 차량용 브레이크 디스크의 온도 추정 방법은 차량의 자세를 제어하는 ESC(Electronic Stability Control) 시스템에 있어서, 상기 차량이 제동상황인지 판단하고, 상기 차량이 제동상황이라면 감속도 와 휠속도 및 외기온도에 따라 상기 차량에 장착된 디스크의 온도를 추정하고, 상기 차량이 비제동상황이라면 휠속도 및 외기온도에 따라 상기 차량에 장착된 디스크의 온도를 추정하는 것이 바람직하다.According to an embodiment of the present invention, a method for estimating a temperature of a brake disc for a vehicle includes determining whether the vehicle is in a braking state and decelerating if the vehicle is in a braking state. It is preferable to estimate the temperature of the disc mounted in the vehicle according to the degree and the wheel speed and the outside temperature, and to estimate the temperature of the disc mounted in the vehicle according to the wheel speed and the outside temperature if the vehicle is in a non-brake situation.

또한, 상기 차량이 제동상황이면 아래의 수식에 의해 디스크의 온도를 추정하는 것이 바람직하다.In addition, when the vehicle is in a braking situation, it is preferable to estimate the temperature of the disc by the following equation.

디스크의 온도(i+1) = 디스크의 온도(i) + 디스크의 온도변화량(i)Disk temperature (i + 1) = disk temperature (i) + disk temperature change (i)

디스크의 온도변화량(i) = C0*외기온도(i) + (C1+C2*외기온도(i))*(감속도2(i)/휠속도(i))Disc temperature change (i) = C0 * outside temperature (i) + (C1 + C2 * outside temperature (i)) * (deceleration 2 (i) / wheel speed (i))

i = 1,2,.....ni = 1,2, ..... n

C0,C1,C2 : 상수 C0, C1, C2: constant

또한, 상기 차량이 비제동상황이면 아래의 수식에 의해 디스크의 온도를 추정하는 것이 바람직하다.In addition, when the vehicle is in a non-braking situation, it is preferable to estimate the temperature of the disc by the following equation.

디스크의 온도(i+1) = 디스크의 온도(i) + 디스크의 온도변화량(i)Disk temperature (i + 1) = disk temperature (i) + disk temperature change (i)

디스크의 온도변화량(i) = C3*외기온도(i) + (C4+C5*외기온도(i))/휠속도(i)Disc temperature change (i) = C3 * outside temperature (i) + (C4 + C5 * outside temperature (i)) / wheel speed (i)

i = 1,2,.....ni = 1,2, ..... n

C3,C4,C5 : 상수C3, C4, C5: constant

이상에서 상세히 살펴본 바와 같이, 본 발명의 차량용 브레이크 디스크의 온도 추정 방법은 외기온도와 감속도 및 휠속도를 고려하여 브레이크 디스크의 온도 를 계산함으로서, 브레이크 디스크의 온도 계산시에 오차를 줄이고, 보다 정확하게 패이딩(Fading) 현상을 감지함으로서 ESC에서 액티브 브레이킹 기능을 적절한 시점에 수행할 수 있도록 도와주는 효과가 있다.As described in detail above, the temperature estimation method of the brake disc for a vehicle of the present invention calculates the temperature of the brake disc in consideration of the outside temperature, deceleration, and wheel speed, thereby reducing errors in calculating the temperature of the brake disc, By detecting the fading phenomenon, the ESC helps the active braking function to be performed at an appropriate time.

이하에서는 본 발명의 바람직한 실시예를 본 도면을 참조하여 상세하게 설명하도록 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

도 1 은 본 발명의 일실시예에 따른 ESC 장치의 구성을 나타내는 블록도이다.1 is a block diagram showing the configuration of an ESC device according to an embodiment of the present invention.

도 1 에 도시된 바와 같이, 휠속도센서(1), 브레이크 압력센서(3), 종가속도센서(2), 흡기구 온도센서(4)와, 흡기구 온도센서(4)에서 측정된 온도에 관한 정보 신호를 입력받고, 브레이크 디스크의 온도를 계산하고, 계산된 온도에 기초하여 패이딩 현상을 판단하여 브레이크를 제어하기 위한 제어신호를 출력하는 ECU(electronic control unit,5)와, ECU(5)로부터 브레이크 제어신호를 수신하고 이에 응답하여 4륜의 휠실린더를 제어하는 브레이크 컨트롤러(6)를 포함한다.As shown in FIG. 1, the information regarding the temperature measured by the wheel speed sensor 1, the brake pressure sensor 3, the longitudinal acceleration sensor 2, the intake air temperature sensor 4, and the intake air temperature sensor 4 is shown. An ECU (electronic control unit) 5 which receives a signal, calculates the temperature of the brake disc, outputs a control signal for controlling the brake by judging the fading phenomenon based on the calculated temperature, and from the ECU 5 And a brake controller 6 which receives the brake control signal and controls the wheel cylinder of the four wheels in response thereto.

휠속도센서(1)는 휠의 속도 및 가속도를 측정하고, 종가속도 센서(2)는 차량의 감속도를 측정하며, 브레이크 압력센서(3)는 운전자의 브레이크 패달 답력에 의해 발생되는 브레이크 액압을 감지하여 그 정보를 ECU(5)에 전송한다.The wheel speed sensor 1 measures the speed and acceleration of the wheel, the longitudinal acceleration sensor 2 measures the deceleration of the vehicle, and the brake pressure sensor 3 measures the brake hydraulic pressure generated by the driver's brake pedal effort. It detects and transmits the information to ECU5.

흡기구 온도센서(4)는 에어클리너 및 에어 덕트를 거쳐 엔진으로 들어가 연소작용을 하는 공기의 온도를 측정하여 ECU(5)로 온도 정보를 전송한다.The intake port temperature sensor 4 enters the engine through the air cleaner and the air duct, measures the temperature of the combustion air, and transmits temperature information to the ECU 5.

ECU(5)는 휠속도센서(1), 종가속도 센서(2), 흡기구 온도센서(4)로부터 전송 된 휠속도, 차량의 감속도, 외기온도에 관한 정보를 이용하여 차량의 디스크의 온도를 추정한다. 이하 ECU(5)가 차량의 디스크의 온도를 추정하는 계산과정에 대해 설명한다.The ECU 5 uses the wheel speed sensor 1, the longitudinal acceleration sensor 2, and the wheel speed transmitted from the intake air temperature sensor 4, the deceleration of the vehicle, and the outside air temperature to determine the temperature of the disk of the vehicle. Estimate. The following describes the calculation process by which the ECU 5 estimates the temperature of the disk of the vehicle.

먼저, 차량의 제동상황 중 디스크의 온도 추정 과정에 대해 알아본다.First, the process of estimating the temperature of the disk in the braking situation of the vehicle is described.

ECU(5)는 브레이크 압력센서(3)를 통해 차량이 제동상황이라는 것을 확인하게 되면, 상술한 센서로부터 휠속도, 감속도, 외기온도에 관한 정보신호를 전송받고, 그 정보를 이용하여 차량의 디스크의 온도를 추정하게 되는데 그 식을 보면 아래와 같다.When the ECU 5 confirms that the vehicle is in a braking state through the brake pressure sensor 3, the ECU 5 receives information signals regarding wheel speed, deceleration, and outside temperature from the above-described sensor, and uses the information to The temperature of the disk is estimated. The equation is as follows.

디스크의 온도(i+1)=디스크의 온도(i) + 디스크의 온도변화량(i)-------①Disk temperature (i + 1) = disk temperature (i) + disk temperature change (i) ------- ①

디스크의 온도변화량(i)=C0*외기온도(i)+(C1+C2*외기온도(i))*(감속도2(i)/휠속도(i))-------②Disc temperature change (i) = C0 * Ambient temperature (i) + (C1 + C2 * Ambient temperature (i)) * (Deceleration 2 (i) / Wheel speed (i)) ------- ②

i = 1,2,.....ni = 1,2, ..... n

C0,C1,C2 : 상수 C0, C1, C2: constant

즉, 현재 추정되는 디스크의 온도는 기존에 추정된 디스크의 온도에 디스크의 온도변화량을 더한 값이 된다. 이 때, 디스크의 최초 추정온도(디스크의 온도(1))의 계산이 문제될 수 있는데, 디스크의 최초의 추정온도는 차량이 비제동상황 시 추정된 디스크의 온도 즉, 후술할 ③,④식에 의해 추정된 온도가 된다.That is, the temperature of the disk currently estimated is the value of the disk temperature change plus the temperature of the previously estimated disk. At this time, the calculation of the initial estimated temperature of the disk (the temperature of the disk (1)) may be a problem, the initial estimated temperature of the disk is the temperature of the disk estimated when the vehicle is in a non-braking situation, e. It becomes the temperature estimated by.

한편, i라는 변수를 두는 이유는 ECU(5)는 실시간으로 온도정보를 업데이트 하므로 전 단계의 값에서, 다음 단계의 값을 결정한다는 것을 수식으로 표현하기 위해서이다.On the other hand, the reason for having the variable i is to express the equation that the ECU 5 determines the value of the next step from the value of the previous step because the ECU 5 updates the temperature information in real time.

정리하면, 제동상황 시 디스크의 온도는 비제동상황 시 디스크의 추정된 온도에서 시작되어, 차량의 감속도의 제곱에 비례하고, 휠속도에 반비례한다. 여기서 상수는 외기온도에 따라 결정되는 값으로 설계자에 의한 실험에 의해 최적의 값이 결정될 수 있다.In summary, the temperature of the disc in the braking situation starts at the estimated temperature of the disc in the non-braking situation, proportional to the square of the deceleration of the vehicle and inversely proportional to the wheel speed. Here, the constant is a value determined according to the outside temperature, and an optimal value may be determined by an experiment by a designer.

다음으로, 차량의 비제동상황 중 디스크의 온도 추정 과정에 대해 알아본다.Next, the process of estimating the temperature of the disk in the non-braking situation of the vehicle will be described.

디스크의 온도(i+1) = 디스크의 온도(i) + 디스크의 온도변화량(i)---③Disk temperature (i + 1) = disk temperature (i) + disk temperature change (i) --- ③

디스크의 온도변화량(i)=C3*외기온도(i)+(C4+C5*외기온도(i))/휠속도(i)--④Disc temperature change (i) = C3 * Ambient temperature (i) + (C4 + C5 * Ambient temperature (i)) / wheel speed (i)-④

i = 1,2,.....ni = 1,2, ..... n

C3,C4,C5 : 상수 C3, C4, C5: constant

즉, 디스크의 추정 온도는 기존에 추정된 디스크의 온도에 디스크의 온도변화량을 더한 값이 된다. 이 때, 디스크의 최초 추정온도(디스크의 온도(1))의 계산이 문제될 수 있는데, 최초로 운행을 시작하는 경우에는 디스크의 최초의 추정온도는 외기온도와 동일하므로 "디스크의 온도(1) = 외기온도"로 볼 수 있으며, 제동상황에서 비제동상황으로 전환되는 경우에는 제동상황에서 추정된 온도가 디스크의 온도(1)가 된다. 즉, 처음 출발할 때에는 디스크의 온도는 외기온도부터 시작되어, 휠속도에 반비례하는 값을 가지게 되며, 제동상황에서 비제동상황으로 전환시에는 제동상황 즉, ①,②식에 의해 추정한 값이 디스크의 온도(1)의 값으로 될 수 있고, 이 초기온도 값이 휠속도에 반비례하여 줄어드는 값이 디스크의 추정온도가 된다.That is, the estimated temperature of the disk is a value obtained by adding the temperature variation of the disk to the estimated temperature of the disk. At this time, the calculation of the initial estimated temperature of the disk (the temperature of the disk (1)) may be problematic. In the case of starting the operation for the first time, the initial estimated temperature of the disk is the same as the outside temperature. Ambient temperature ”, and when the braking situation is switched from the braking situation to the non-braking situation, the temperature estimated in the braking situation becomes the disk temperature (1). In other words, when starting for the first time, the disk temperature starts from the outside temperature and has a value inversely proportional to the wheel speed. When switching from the braking situation to the non-braking situation, the braking situation, i.e. The value of the temperature 1 of the disk may be a value, and the estimated value of the disk decreases inversely proportional to the wheel speed.

여기서 상수는 외기온도에 따라 설계자에 의해 최적의 값이 결정될 수 있다.The constant may be determined by the designer according to the ambient temperature.

도 2는 본 발명의 일실시예에 의한 ESC의 제어흐름도이다.2 is a control flowchart of an ESC according to an embodiment of the present invention.

먼저, ECU(5)는 휠속도센서(1), 종가속도 센서(2), 흡기구 온도센서(4)로부터 휠속도, 차량의 감속도, 외기온도에 관한 전기적 신호를 주기적으로 전송받는다.(s10)First, the ECU 5 periodically receives electrical signals regarding the wheel speed, the deceleration of the vehicle, and the outside temperature from the wheel speed sensor 1, the longitudinal acceleration sensor 2, and the intake air temperature sensor 4 (s10). )

다음으로, ECU(5)는 제동상황인지 여부를 판단한다. 즉, 브레이크 압력센서(3)는 운전자의 브레이크 패달 답력에 의해 발생되는 브레이크 액압을 감지하고, 이에 대한 정보를 ECU(5)에 전기적 신호로 전달하며, 이 신호에 따라 ECU(5)는 제동상황인지 여부를 판단하게 된다(S20)Next, the ECU 5 determines whether it is in a braking situation. That is, the brake pressure sensor 3 detects the brake hydraulic pressure generated by the driver's brake pedal effort, and transmits the information about the brake hydraulic pressure to the ECU 5 as an electric signal, and the ECU 5 brakes according to the signal. It is determined whether or not (S20)

다음으로, ECU(5)가 비제동상황이라고 판단하면, 비제동상황에서 디스크의 온도를 추정한다. 즉, ECU(5)는 상술한 휠속도센서(1), 흡기구 온도센서(4)로부터 전송된 전기적 신호에 기하여 디스크의 온도를 추정한다. 즉, 비제동상황일 때 디스크의 추정온도는 외기온도에서 시작되어, 휠속도에 반비례한다는 것에 착안하여 도 1에서 설명한 수식 ③,④식에 기하여 디스크의 온도를 추정한다.(s30)Next, when the ECU 5 determines that it is in a non-braking situation, the temperature of the disk is estimated in the non-braking situation. In other words, the ECU 5 estimates the temperature of the disk based on the electrical signals transmitted from the wheel speed sensor 1 and the intake air temperature sensor 4 described above. That is, in the non-braking situation, the estimated temperature of the disk starts at the outside temperature and is inversely proportional to the wheel speed, and the temperature of the disk is estimated based on Equations 3 and 4 described in FIG. 1 (s30).

한편, ECU(5)가 제동상황이라고 판단하면, 제동상황에서 디스크의 온도를 추정한다. 즉, 제동상황일 때 디스크의 추정온도는 비제동상황일 때 추정된 디스크 온도를 초기온도로 하고, 이 온도가 차량의 감속도의 제곱에 비례하고, 휠속도에 반비례하여 변한다는 것에 착안하여 도 1에서 설명한 수식 ①,②식에 기하여 디스크의 온도를 추정한다.(s40) On the other hand, when the ECU 5 determines that the braking situation, the temperature of the disk is estimated in the braking situation. In other words, the estimated temperature of the disk in the braking situation is assumed to be the initial temperature of the disk in the non-braking situation, and the temperature is proportional to the square of the deceleration of the vehicle and changes in inverse proportion to the wheel speed. The temperature of the disk is estimated based on the equations (1) and (2) described in (1).

다음으로, 제동상황에서 판단된 디스크의 온도가 패이딩 온도보다 높은지 확인한다. 여기서 패이딩 온도는 운전자의 제동의지가 차량에 제대로 전달되지 못하 여 차량의 사고를 유발할 수 있는 페이딩(Fading) 현상이 일어날 수 있는 온도로서약 500℃정도 된다.(s50)Next, it is checked whether the disk temperature determined in the braking situation is higher than the padding temperature. Here, the fading temperature is a temperature at which a fading phenomenon may occur, in which a driver's braking will not be properly delivered to the vehicle, which may cause an accident of the vehicle (s50).

만약, 디스크의 추정된 온도가 패이딩 온도보다 높다고 판단되면, ECU(5)는 액티브 브레이킹(Active Braking) 기능을 수행한다.(s60)If it is determined that the estimated temperature of the disk is higher than the padding temperature, the ECU 5 performs an active braking function (s60).

여기서, 액티브 브레이킹 기능이란 차량의 제동력이 운전자에 의해서만 발생하는 것이 아니라, ECU(5)에 의해서도 발생하는 것을 의미한다. 즉, 액티브 브레이킹 기능이 수행되면 운전자가 의도한 제동압력에 관계없이, ECU(5)가 스스로 모터(미도시)를 회전시키는 신호를 발생시켜 바퀴에 브레이크 압력을 생성하게 된다.Here, the active braking function means that the braking force of the vehicle is generated not only by the driver but also by the ECU 5. That is, when the active braking function is performed, regardless of the braking pressure intended by the driver, the ECU 5 generates a signal for rotating the motor (not shown) by itself to generate brake pressure on the wheels.

한편, 디스크의 추정온도가 패이딩 온도보다 작으면, 운전자가 의도한 제동압력에 의해서만 브레이크가 작동하게 되며, s10단계로 피드백한다.On the other hand, if the estimated temperature of the disk is less than the padding temperature, the brake is operated only by the braking pressure intended by the driver, and feeds back to step S10.

도 1 은 본 발명의 일실시예에 따른 ESC 장치의 구성을 나타내는 블록도1 is a block diagram showing the configuration of an ESC device according to an embodiment of the present invention;

도 2는 본 발명의 일실시예에 의한 ESC의 제어흐름도2 is a control flow diagram of an ESC according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호 설명 *Explanation of symbols on the main parts of the drawings

1 : 휠속도센서 2 : 종가속도센서1: Wheel speed sensor 2: Vertical acceleration sensor

3 : 브레이크압력센서 3 : 흡기구온도센서3: brake pressure sensor 3: intake air temperature sensor

5 : ECU 5: ECU

Claims (3)

차량의 자세를 제어하는 ESC(Electronic Stability Control) 시스템에 있어서, In the ESC (Electronic Stability Control) system for controlling the attitude of the vehicle, 상기 차량이 제동상황인지 판단하고,Determine whether the vehicle is in a braking situation, 상기 차량이 제동상황이라면 감속도와 휠속도 및 외기온도에 따라 상기 차량에 장착된 디스크의 온도를 추정하고,If the vehicle is in a braking situation, the temperature of the disc mounted in the vehicle is estimated according to the deceleration, the wheel speed, and the outside temperature, 상기 차량이 비제동상황이라면 휠속도 및 외기온도에 따라 상기 차량에 장착된 디스크의 온도를 추정하는 것을 특징으로 하는 차량용 브레이크 디스크의 온도추정방법If the vehicle is in a non-brake situation, the temperature estimation method of the brake disc for a vehicle, characterized in that for estimating the temperature of the disk mounted on the vehicle according to the wheel speed and the outside temperature 제 1 항에 있어서,The method of claim 1, 상기 차량이 제동상황이면 아래의 수식에 의해 디스크의 온도를 추정하는 것을 특징으로 하는 차량용 브레이크 디스크의 온도추정방법.And estimating the temperature of the disc according to the following equation when the vehicle is in a braking condition. 디스크 온도(i+1)=디스크 온도(i)+디스크의 온도변화량(i)Disk temperature (i + 1) = disk temperature (i) + temperature change of disk (i) 디스크의 온도변화량(i)=C0*외기온도(i)+(C1+C2*외기온도(i))*(감속도2(i)/휠속도(i))Disc temperature change (i) = C0 * outside temperature (i) + (C1 + C2 * outside temperature (i)) * (deceleration 2 (i) / wheel speed (i)) i = 1,2,.....ni = 1,2, ..... n C0,C1,C2 : 상수 C0, C1, C2: constant 제 1 항에 있어서,The method of claim 1, 상기 차량이 비제동상황이면 아래의 수식에 의해 디스크의 온도를 추정하는 것을 특징으로 하는 차량용 브레이크 디스크의 온도추정방법.And estimating the temperature of the disk according to the following equation when the vehicle is in a non-braking condition. 디스크의 온도(i+1) = 디스크의 온도(i)+디스크의 온도변화량(i)Disk temperature (i + 1) = disk temperature (i) + disk temperature change (i) 디스크의 온도변화량(i) = C3*외기온도(i)+(C4+C5*외기온도(i))/휠속도(i)Disk temperature change (i) = C3 * outside temperature (i) + (C4 + C5 * outside temperature (i)) / wheel speed (i) i = 1,2,.....n i = 1,2, ..... n C3,C4,C5 : 상수C3, C4, C5: constant
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150124587A (en) * 2014-04-29 2015-11-06 주식회사 만도 Control method of motor on caliper based on calculated disc temperature
CN110539737A (en) * 2018-05-28 2019-12-06 比亚迪股份有限公司 Vehicle parking method and device, storage medium, electronic device and vehicle
CN114312723A (en) * 2022-01-14 2022-04-12 中国第一汽车股份有限公司 Brake disc temperature determination method and device and vehicle
US11654877B2 (en) 2017-12-27 2023-05-23 Robert Bosch Gmbh System and method for detecting brake fading in a vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5136508A (en) * 1990-06-19 1992-08-04 Allied-Signal Inc. Brake lining temperature prediction for a traction control system
US5731975A (en) * 1994-08-05 1998-03-24 Toyota Jidosha Kabushiki Kaisha Temperature assuming apparatus for a brake pad and wheel slip controlling apparatus using the same
JP3585707B2 (en) * 1997-08-29 2004-11-04 本田技研工業株式会社 Method of estimating temperature of brake friction material in vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150124587A (en) * 2014-04-29 2015-11-06 주식회사 만도 Control method of motor on caliper based on calculated disc temperature
US11654877B2 (en) 2017-12-27 2023-05-23 Robert Bosch Gmbh System and method for detecting brake fading in a vehicle
CN110539737A (en) * 2018-05-28 2019-12-06 比亚迪股份有限公司 Vehicle parking method and device, storage medium, electronic device and vehicle
CN114312723A (en) * 2022-01-14 2022-04-12 中国第一汽车股份有限公司 Brake disc temperature determination method and device and vehicle

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