KR20130008355A - Apparatus for monitoring valve of electronic stability control system in vehicle - Google Patents

Apparatus for monitoring valve of electronic stability control system in vehicle Download PDF

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KR20130008355A
KR20130008355A KR1020110069058A KR20110069058A KR20130008355A KR 20130008355 A KR20130008355 A KR 20130008355A KR 1020110069058 A KR1020110069058 A KR 1020110069058A KR 20110069058 A KR20110069058 A KR 20110069058A KR 20130008355 A KR20130008355 A KR 20130008355A
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South Korea
Prior art keywords
valve
fet
power supply
comparator
valve power
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KR1020110069058A
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Korean (ko)
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KR101854123B1 (en
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박재현
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현대모비스 주식회사
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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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • 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
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • 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
    • B60T8/36—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 including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters

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

Abstract

PURPOSE: An apparatus for monitoring a valve of an ESC(Electronic Stability Control) system in a vehicle is provided to satisfy a short loop time of the ESC system and to monitor the failure of a valve power supply FET and a valve driving FET. CONSTITUTION: An apparatus for monitoring a valve of an ESC system in a vehicle comprises a valve power supply FET(1), a valve driving FET(2), a solenoid coil(7), a first comparator(3), a second comparator(4), and a MCU(5). The valve power supply FET supplies battery power according to the output signals of a charge pump IC(6). The valve driving FET drives vehicle posture control signals. One side of the solenoid valve is connected to the valve power supply FET and the other side is connected to the valve driving FET. The first comparator monitors the operation state of the valve power supply FET. The second comparator monitors the operation state of the valve driving FET. The MCU determines the operation state and the failure of the valve power supply FET and the valve driving FET. [Reference numerals] (1) Valve power supply FET; (2) Valve driving FET; (7) Solenoid coil; (AA) First comparator; (BB) Second comparator; (CC) Fixed voltage of 2V; (DD) Vehicle position control signal; (EE) Inner voltage(VCC); (FF) Reverse voltage prevention diode

Description

차량용 자세 제어 시스템의 밸브 모니터링 장치{APPARATUS FOR MONITORING VALVE OF ELECTRONIC STABILITY CONTROL SYSTEM IN VEHICLE}Valve monitoring device for vehicle attitude control system {APPARATUS FOR MONITORING VALVE OF ELECTRONIC STABILITY CONTROL SYSTEM IN VEHICLE}

본 발명은 차량용 자세 제어 시스템의 밸브 모니터링 장치에 관한 것으로, 더 상세하게는 ABS(Anti-lock Brake System) ESC(Electronic Stability Control) 시스템의 짧은 루프타임을 만족시키고 밸브 전원 공급 FET뿐만 아니라 밸브 구동 FET의 불량 여부를 동시에 모니터링할 수 있도록 한 차량용 자세 제어 시스템의 밸브 모니터링 장치에 관한 것이다.
The present invention relates to a valve monitoring device for a vehicle attitude control system, and more particularly, to satisfy the short loop time of an anti-lock brake system (ABS) electronic stability control (ESC) system and to provide a valve driving FET as well as a valve power supply FET. It relates to a valve monitoring device for a vehicle attitude control system that can simultaneously monitor whether or not the defect.

일반적으로 ABS(Anti-lock Brake System)는 자동차가 급제동할 때 바퀴가 잠기는 현상을 방지하기 위해 개발된 특수 브레이크 시스템을 말한다.Generally, the anti-lock brake system (ABS) is a special brake system developed to prevent the wheels from locking up when the vehicle suddenly brakes.

자동차가 달릴 때는 4개 바퀴에 똑같은 무게가 실리지 않게 되며, 이런 상태에서 급제동을 하면 일부 바퀴에 로크업(lock-up)현상, 즉 바퀴가 잠기는 현상이 발생한다.When the car is running, the four wheels do not carry the same weight, and sudden braking in this state causes some wheels to lock-up, or lock the wheels.

이는 차량은 여전히 진행하고 있는데도 바퀴는 완전히 멈춰선 상태를 말하는데, 이때 차량이 미끄러지거나 옆으로 밀려 운전자가 차의 방향을 제대로 제어할 수 없게 된다.This means that the vehicle is still in progress, but the wheels are completely stopped, and the vehicle can slide or push to the side, preventing the driver from properly controlling the direction of the car.

이러한 문제를 방지하려면 바퀴가 잠기지 않도록 브레이크를 밟았다 놓았다 하는 펌핑을 해주어야 하며, 이 펌핑 작동을 전자제어장치나 기계적인 장치를 이용하여 1초에 10회 이상 반복되면서 제동이 이루어지도록 한 것이 ABS의 원리이다.To prevent this problem, the brakes should be pumped to prevent the wheels from locking and the pumping operation is repeated 10 times or more per second using an electronic control device or a mechanical device. to be.

ABS는 보통 브레이크와 같은 시스템의 부스터와 마스터실린더에 전자제어장치인 ECU(electronic control unit), 유압조정장치인 HCU(hydraulic control unit), 바퀴의 속도를 감지하는 휠센서(wheel sensors), 브레이크를 밟은 상태를 감지하는 PTS(pedal travel switch)로 이루어진다.ABS is usually used in boosters and master cylinders of systems such as brakes, electronic control units (ECU), hydraulic control units (HCU), wheel sensors that sense the speed of wheels, and brakes. It consists of a PTS (pedal travel switch) that detects the stepped state.

한편 본 발명이 관계하는 ABS ESC(Electronic Stability Control) 시스템은 차량의 선회시 한계성능을 넘어가려고 할 때 유압을 이용한 제동력을 발생하여 차량의 거동을 안정화시켜 주는 차량용 자세 제어 시스템이다.On the other hand, ABS ESC (Electronic Stability Control) system to which the present invention relates is a vehicle attitude control system that stabilizes the behavior of the vehicle by generating a braking force using hydraulic pressure when trying to exceed the limit performance when the vehicle turns.

이러한 ABS ESC 시스템에는 차량의 자세 제어를 위해 유압 조절용 솔레노이드 밸브를 복수개 구비하고 있다.The ABS ESC system is provided with a plurality of solenoid valves for hydraulic control to control the attitude of the vehicle.

도 1은 종래 기술에 의한 차량용 자세 제어 시스템의 밸브 모니터링 장치의 구성을 설명하기 위한 도면이다.1 is a view for explaining the configuration of a valve monitoring device of a vehicle attitude control system according to the prior art.

도 1을 참고하면, 종래 기술에 의한 차량용 자세 제어 시스템의 밸브 모니터링 장치는 밸브 전원공급 FET의 소스단을 MCU가 ADC 전압값을 모니터링하도록 구성된다.Referring to FIG. 1, the valve monitoring apparatus for a vehicle attitude control system according to the related art is configured such that the MCU monitors the ADC voltage value at the source terminal of the valve power supply FET.

밸브 전원공급 FET가 오프인 경우 FET 소스단에 0V가 검출되고, 밸브 전원공급 FET가 온인 경우 FET 소스단에 배터리 전압이 검출되면 밸브 전원공급 FET를 정상상태로 판단한다. When the valve power supply FET is off, 0V is detected at the FET source terminal. When the valve power supply FET is on, the battery voltage is detected as normal when the battery voltage is detected at the FET source terminal.

만약, 다른 전압 레인지가 검출되면 밸브 전원공급 FET를 비정상 상태로 판단하여 페일세이프(FAILSAFE) 구동시킨다.If a different voltage range is detected, the valve power supply FET is determined to be in an abnormal state to drive a failsafe.

그러나, 종래 기술은 밸브 전원공급 FET의 정상 동작 여부만을 확인하고 있다.However, the prior art only checks the normal operation of the valve power supply FET.

또한, 종래 기술에 의한 차량용 자세 제어 시스템은 빠를 처리 속도를 필요로 하는 ABS ESC 시스템에서 ADC 값을 주기적으로 입력받아 MCU의 소프트웨어(SW)가 전원공급 밸브 FET의 정상 여부를 판단하므로 소프트웨어에 로드가 걸리는 문제점이 있고, 이로 인해 ABS ESC 시스템의 짧은 루프타임을 만족시키지 못하는 문제점이 있다.
In addition, the vehicle posture control system according to the prior art receives the ADC value periodically from the ABS ESC system that requires a faster processing speed, so that the software of the MCU determines whether the power supply valve FET is normal, so that the load on the software is increased. There is a problem, which causes a problem that does not satisfy the short loop time of the ABS ESC system.

본 발명은 ABS(Anti-lock Brake System) ESC(Electronic Stability Control) 시스템의 짧은 루프타임을 만족시키고 밸브 전원 공급 FET뿐만 아니라 밸브 구동 FET의 불량 여부를 동시에 모니터링할 수 있도록 한 차량용 자세 제어 시스템의 밸브 모니터링 장치를 제공하는데 그 목적이 있다.
The present invention satisfies the short loop time of the anti-lock brake system (ABS) electronic stability control (ESC) system and enables the valve of a vehicle attitude control system to simultaneously monitor whether the valve power supply FET as well as the valve driving FET are defective. The purpose is to provide a monitoring device.

본 발명에 의한 차량용 자세 제어 시스템의 밸브 모니터링 장치는, 차지펌프IC의 출력신호에 따라 배터리 전원을 공급하는 밸브 전원공급 FET; 차량자세제어신호에 따라 구동하는 밸브 구동 FET; 상기 밸브 전원공급 FET와 일측이 연결되고 타측은 상기 밸브 구동 FET와 연결된 솔레노이드 코일; 상기 밸브 전원공급 FET의 동작 상태를 모니터링하기 위한 제1비교기; 상기 밸브 구동 FET의 동작 상태를 모니터링하기 위한 제2비교기; 및 상기 밸브 전원공급 FET와 상기 밸브 구동 FET의 온오프 상태와 상기 제1비교기와 상기 제2비교기로부터 출력되는 각각의 로직신호에 따라 상기 밸브 전원공급 FET와 상기 밸브 구동 FET의 동작상태와 불량 여부를 판정하는 MCU;를 포함하는 것을 특징으로 한다.A valve monitoring apparatus for a vehicle attitude control system according to the present invention includes a valve power supply FET for supplying battery power in accordance with an output signal of a charge pump IC; A valve driving FET for driving in accordance with the vehicle attitude control signal; A solenoid coil connected to one side of the valve power supply FET and the other side of the valve driving FET; A first comparator for monitoring an operating state of the valve power supply FET; A second comparator for monitoring an operating state of the valve drive FET; And whether the valve power supply FET and the valve drive FET are in operation or not according to on / off states of the valve power supply FET and the valve driving FET and respective logic signals output from the first comparator and the second comparator. MCU to determine; characterized in that it comprises a.

본 발명에서, 상기 밸브 전원공급 FET와 상기 솔레노이드 코일이 연결된 노드로 내부전원을 공급하는 내부전원을 연결시켜 구성한 것을 특징으로 한다.In the present invention, the valve power supply FET and the solenoid coil is characterized in that the internal power supply for supplying the internal power supply to the node connected.

본 발명에서, 상기 제1비교기는 상기 밸브 전원공급 FET의 드레인단 전압과 소스단 전압을 비교하여 제1로직신호를 상기 MCU로 출력하도록 구성한 것을 특징으로 한다.In the present invention, the first comparator is configured to output a first logic signal to the MCU by comparing the drain terminal voltage and the source terminal voltage of the valve power supply FET.

본 발명에서, 상기 제2비교기는 상기 밸브 전원공급 FET의 소스단 전압과 고정전압을 비교하여 제2로직신호를 상기 MCU로 출력하도록 구성한 것을 특징으로 한다.
In the present invention, the second comparator is configured to output a second logic signal to the MCU by comparing the source terminal voltage and the fixed voltage of the valve power supply FET.

상술한 바와 같이, 본 발명은 비교기의 로직신호로 밸브 FET의 불량 여부를 바로 판정하므로 MCU의 소프트웨어 로직의 부하를 줄여 ABS(Anti-lock Brake System) ESC(Electronic Stability Control) 시스템의 짧은 루프타임을 만족시킨다. As described above, the present invention immediately determines whether or not the valve FET is defective by the logic signal of the comparator, thereby reducing the load on the software logic of the MCU, thereby reducing the short loop time of the anti-lock brake system (ABS) electronic stability control (ESC) system. Satisfy.

또한, 본 발명은 밸브 전원 공급 FET뿐만 아니라 밸브 구동 FET의 불량 여부를 동시에 모니터링할 수 있다.
In addition, the present invention can simultaneously monitor whether the valve power supply FET as well as the valve drive FET is defective.

도 1은 종래 기술에 의한 차량용 자세 제어 시스템의 밸브 모니터링 장치의 구성을 설명하기 위한 도면이다.
도 2는 본 발명의 일 실시예에 따른 차량용 자세 제어 시스템의 밸브 모니터링 장치의 구성을 설명하기 위한 도면이다.
도 3은 본 발명의 일 실시예에 따른 밸브 모니터링 장치의 불량 여부 판정을 예시한 도면이다.1 is a view for explaining the configuration of a valve monitoring device of a vehicle attitude control system according to the prior art.
2 is a view for explaining the configuration of the valve monitoring device of the vehicle attitude control system according to an embodiment of the present invention.
3 is a diagram illustrating whether the valve monitoring device is defective according to an embodiment of the present invention.

이하, 실시예를 통하여 본 발명을 더욱 상세히 설명하기로 한다. 이들 실시예는 단지 본 발명을 예시하기 위한 것이며, 본 발명의 권리 보호 범위가 이들 실시예에 의해 제한되는 것은 아니다.Hereinafter, the present invention will be described in more detail with reference to Examples. These embodiments are only for illustrating the present invention, and the scope of rights of the present invention is not limited by these embodiments.

이 과정에서 도면에 도시된 선들의 두께나 구성요소의 크기 등은 설명의 명료성과 편의상 과장되게 도시되어 있을 수 있다. 또한, 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례에 따라 달라질 수 있다. 그러므로, 이러한 용어들에 대한 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다.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 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 this specification.

도 2는 본 발명의 일 실시예에 따른 차량용 자세 제어 시스템의 밸브 모니터링 장치의 구성을 설명하기 위한 도면이고, 도 3은 본 발명의 일 실시예에 따른 밸브 모니터링 장치의 불량 여부 판정을 예시한 도면이다.2 is a view for explaining the configuration of the valve monitoring device of the vehicle attitude control system according to an embodiment of the present invention, Figure 3 is a view illustrating the determination of the failure of the valve monitoring device according to an embodiment of the present invention. to be.

도 2에 도시한 바와 같이, 본 발명의 일 실시예에 따른 차량용 자세 제어 시스템의 밸브 모니터링 장치는 밸브 전원공급 FET(1), 밸브 구동 FET(2), 제1비교기(3), 제2비교기(4), 및 MCU(5)를 포함한다.As shown in FIG. 2, the valve monitoring apparatus for a vehicle attitude control system according to an exemplary embodiment of the present invention includes a valve power supply FET 1, a valve driving FET 2, a first comparator 3, and a second comparator. (4), and MCU 5.

밸브 전원공급 FET(1)는 차지펌프IC(6)의 출력신호에 따라 온/오프 구동한다. 이러한 밸브 전원공급 FET(1)는 온 구동시 배터리(8) 전원을 솔레노이드 코일(8)로 공급한다. 한편, 밸브 전원공급 FET(1)와 배터리(8) 사이에는 역전압 방지 다이오드(9)가 연결된다.The valve power supply FET 1 drives on / off in accordance with the output signal of the charge pump IC 6. The valve power supply FET 1 supplies the battery 8 power to the solenoid coil 8 at the time of driving on. On the other hand, a reverse voltage prevention diode 9 is connected between the valve power supply FET 1 and the battery 8.

밸브 구동 FET(2)는 차량자세제어신호에 구동한다. 차량자세제어신호는 ECU(미도시)가 차량 상태를 감시하여 차량 자세 제어가 필요하다고 판단될 때 활성화되는 신호이다. 예를 들면 ABS(Anti-lock Brake System)를 동작시켜야 하는 상황일 때 활성화되는 신호이다.The valve drive FET 2 drives the vehicle posture control signal. The vehicle posture control signal is a signal that is activated when the ECU (not shown) monitors the vehicle state and determines that vehicle attitude control is necessary. For example, this signal is activated when the ABS (Anti-lock Brake System) must be operated.

솔레노이드 코일(7)은 밸브 전원공급 FET(1)와 일측이 연결되고 타측은 밸브 구동 FET(2)와 연결된다. 이러한 솔레노이드 코일(7)은 밸브 전원공급 FET(1)가 온 상태에서 차량자세제어신호가 활성화되어 밸브 구동 FET(2)가 온 될 때 흐르는 전류에 의해 자기장을 형성하여 솔레노이드 밸브(미도시)를 동작시킨다.The solenoid coil 7 is connected to the valve power supply FET 1 on one side and the other side to the valve driving FET 2. The solenoid coil 7 forms a magnetic field by a current flowing when the vehicle posture control signal is activated and the valve driving FET 2 is turned on while the valve power supply FET 1 is turned on to form a solenoid valve (not shown). Operate.

내부전원(VCC)은 ECU의 레귤레이터에서 생성되는 전원으로, 밸브 전원공급 FET(1)와 솔레노이드 코일(7)이 연결된 노드로 공급된다. 이는 밸브 전원공급 FET(1)의 오프 상태에서 밸브 전원공급 FET(1)와 솔레노이드 코일(7)이 연결된 노드가 플로팅되는 것을 방지한다. The internal power supply (VCC) is a power generated by the regulator of the ECU and is supplied to a node to which the valve power supply FET 1 and the solenoid coil 7 are connected. This prevents the node connected to the valve power supply FET 1 and the solenoid coil 7 from floating in the off state of the valve power supply FET 1.

이를 통해 밸브 전원공급 FET(1)가 오프된 상태에서도 제1비교기(3)와 제2비교기(4)가 정상 동작하므로 밸브 전원공급 FET(1)와 밸브 구동 FET(2)를 모니터링할 수 있다.As a result, since the first comparator 3 and the second comparator 4 operate normally even when the valve power supply FET 1 is turned off, the valve power supply FET 1 and the valve driving FET 2 can be monitored. .

제1비교기(3)는 밸브 전원공급 FET(1)의 동작 상태를 모니터링하기 위한 것으로, 밸브 전원공급 FET(1)의 드레인단 전압과 소스단 전압을 비교하고, 그 비교결과에 따른 제1로직신호를 MCU(5)로 출력한다.The first comparator 3 is for monitoring the operating state of the valve power supply FET 1, and compares the drain terminal voltage and the source terminal voltage of the valve power supply FET 1 with the first logic according to the comparison result. The signal is output to the MCU (5).

제2비교기(4)는 밸브 구동 FET(2)의 동작 상태를 모니터링하기 위한 것으로, 밸브 전원공급 FET(1)의 소스단 전압과 고정전압(2V)을 비교하여 제2로직신호를 MCU(5)로 출력한다.The second comparator 4 monitors the operating state of the valve driving FET 2. The second comparator 4 compares the source terminal voltage of the valve power supply FET 1 with the fixed voltage (2V) to convert the second logic signal into the MCU (5). )

MCU(5)는 밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 온오프 상태와 제1비교기(3)로부터 출력되는 제1로직신호와 제2비교기(4)로부터 출력되는 제2로직신호에 따라 밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 동작상태와 불량 여부를 판정한다.The MCU 5 has the on-off state of the valve power supply FET 1 and the valve drive FET 2 and the first logic signal output from the first comparator 3 and the second logic output from the second comparator 4. In accordance with the signal, it is determined whether the valve power supply FET 1 and the valve drive FET 2 are in an operating state or not.

밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 동작상태와 불량 여부 판정에 대해 설명하면 다음과 같다.The operation state of the valve power supply FET 1 and the valve drive FET 2 and the determination of the failure will be described as follows.

도 3에 도시한 바와 같이, 밸브 전원공급 FET(1)가 온 상태이고 밸브 구동 FET(2)가 오프 상태에서, 제1로직신호가 로우로 입력되고 제2로직신호가 로우로 입력되면, 밸브 전원공급 FET(1)를 정상 동작 상태로 판정한다.As shown in Fig. 3, when the valve power supply FET 1 is on and the valve drive FET 2 is off, when the first logic signal is input low and the second logic signal is input low, The power supply FET 1 is determined to be in a normal operating state.

또한, 밸브 전원공급 FET(1)가 온 상태이고 밸브 구동 FET(2)가 오프 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 로우로 입력되면, 밸브 전원공급 FET(1)의 동작 상태를 오픈 상태로 판정한다.Further, when the valve power supply FET 1 is on and the valve drive FET 2 is off, when the first logic signal is input high and the second logic signal is input low, the valve power supply FET 1 Determine the operating state of the open state.

또한, 밸브 전원공급 FET(1)가 온 상태이고 밸브 구동 FET(2)가 온 상태에서, 제1로직신호가 로우로 입력되고 제2로직신호가 로우로 입력되면, 밸브 전원공급 FET(1)와 밸브 구동 FET(2)를 정상 동작 상태로 판정한다.Further, when the valve power supply FET 1 is on and the valve drive FET 2 is on, when the first logic signal is low and the second logic signal is low, the valve power supply FET 1 And the valve drive FET 2 are determined to be in a normal operating state.

또한, 밸브 전원공급 FET(1)가 온 상태이고 밸브 구동 FET(2)가 온 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 로우로 입력되면, 밸브 전원공급 FET(1)에 과전류(over current)가 흐르고 있는 것으로 판정한다.Further, when the valve power supply FET 1 is on and the valve drive FET 2 is on, when the first logic signal is input high and the second logic signal is input low, the valve power supply FET 1 It is determined that an overcurrent flows through.

또한, 밸브 전원공급 FET(1)가 온 상태이고 밸브 구동 FET(2)가 온 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 하이로 입력되면, 밸브 전원공급 FET(1)가 그라운드(GND)에 쇼트(short)된 것으로 판정한다.Further, when the valve power supply FET 1 is on and the valve drive FET 2 is on, when the first logic signal is input high and the second logic signal is input high, the valve power supply FET 1 It is determined that is shorted to ground GND.

또한, 밸브 전원공급 FET(1)가 오프 상태이고 밸브 구동 FET(2)가 온 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 하이로 입력되면, 밸브 구동 FET(2)를 정상 동작 상태로 판정한다.In addition, when the valve power supply FET 1 is off and the valve drive FET 2 is on, when the first logic signal is input high and the second logic signal is input high, the valve drive FET 2 is turned off. Determine the normal operation state.

또한, 밸브 전원공급 FET(1)가 오프 상태이고 밸브 구동 FET(2)가 온 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 로우로 입력되면, 밸브 구동 FET(2)의 동작 상태를 오픈 상태로 판정한다.Further, when the valve power supply FET 1 is off and the valve drive FET 2 is on, when the first logic signal is input high and the second logic signal is input low, the valve drive FET 2 is turned on. The operating state is determined to be open.

또한, 밸브 전원공급 FET(1)가 오프 상태이고 밸브 구동 FET(2)가 오프 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 로우로 입력되면, 밸브 전원공급 FET(1)를 정상 동작 상태로 판정한다.Further, when the valve power supply FET 1 is off and the valve drive FET 2 is off, when the first logic signal is input high and the second logic signal is input low, the valve power supply FET 1 Is determined to be a normal operating state.

또한, 밸브 전원공급 FET(1)가 오프 상태이고 밸브 구동 FET(2)가 오프 상태에서, 제1로직신호가 하이로 입력되고 제2로직신호가 하이로 입력되면, 솔레노이드 코일(7) 또는 밸브 전원공급 FET(1)가 그라운드에 쇼트된 것으로 판정한다.In addition, when the valve power supply FET 1 is in the off state and the valve drive FET 2 is in the off state, when the first logic signal is input high and the second logic signal is input high, the solenoid coil 7 or the valve It is determined that the power supply FET 1 is shorted to ground.

이와 같이 MCU(5)는 밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 온,오프 상태와 제1로직신호와 제2로직신호에 따라 밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 동작상태뿐만 아니라 불량 여부를 판정한다.In this way, MCU (5) is the valve power supply FET 1 and the valve drive FET (2) in accordance with the on-off state and the first logic signal and the second logic signal, the valve power supply FET 1 and the valve drive FET ( In addition to the operation state of 2), it is determined whether or not it is defective.

즉, 종래에서는 MCU(5)에서 ADC 신호를 입력받아 소프트웨어적으로 ADC 신호를 분석하여 밸브 전원공급 FET(1)의 불량 여부를 판정하였다면, 본 발명에서는 하드웨어적으로 제1비교기(3)와 제2비교기(4)로부터 출력되는 로직신호를 통해 바로 밸브 전원공급 FET(1)와 밸브 구동 FET(2)의 동작상태뿐만 아니라 불량 여부를 판정하므로 종래 기술보다 불량 판정하는데 시간이 덜 지연된다.That is, conventionally, if the MCU 5 receives the ADC signal and analyzes the ADC signal by software to determine whether the valve power supply FET 1 is defective, in the present invention, the first comparator 3 and the first comparator 3 Since the operation of the valve power supply FET 1 and the valve drive FET 2 is determined not only through the logic signal output from the comparator 4 but also in a bad state, the time for delay determination is less delayed than in the prior art.

이와 같이, 본 발명은 비교기의 로직신호로 밸브 FET의 불량 여부를 바로 판정하므로 MCU의 소프트웨어 로직의 부하를 줄여 ABS(Anti-lock Brake System) ESC(Electronic Stability Control) 시스템의 짧은 루프타임을 만족시킬 수 있다. 또한, 본 발명은 밸브 전원 공급 FET(1)뿐만 아니라 밸브 구동 FET(2)의 동작상태와 불량 여부를 동시에 모니터링할 수 있다.
As such, the present invention immediately determines whether the valve FET is defective by the logic signal of the comparator, thereby reducing the load of the software logic of the MCU to satisfy the short loop time of the anti-lock brake system (ABS) electronic stability control (ESC) system. Can be. In addition, the present invention can simultaneously monitor the operation state and failure of the valve drive FET 2 as well as the valve power supply FET 1.

상술한 바와 같이 본 발명은 도면에 도시된 실시예를 참고로 하여 설명되었으나, 이는 예시적인 것에 불과하며, 당해 기술이 속하는 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 기술적 보호범위는 아래의 특허청구범위에 의해서 정하여져야 할 것이다.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

1 : 밸브 전원공급 FET 2 : 밸브 구동 FET
3 : 제1비교기 4 : 제2비교기
5 : MCU 6 : 차지펌프IC
7 : 솔레노이드 코일 8 : 배터리
9 : 역전압 방지 다이오드 VCC : 내부전원1: Valve Power Supply FET 2: Valve Drive FET
3: first comparator 4: second comparator
5: MCU 6: Charge Pump IC
7: solenoid coil 8: battery
9: reverse voltage prevention diode VCC: internal power supply

Claims (4)

차지펌프IC의 출력신호에 따라 배터리 전원을 공급하는 밸브 전원공급 FET;
차량자세제어신호에 따라 구동하는 밸브 구동 FET;
상기 밸브 전원공급 FET와 일측이 연결되고 타측은 상기 밸브 구동 FET와 연결된 솔레노이드 코일;
상기 밸브 전원공급 FET의 동작 상태를 모니터링하기 위한 제1비교기;
상기 밸브 구동 FET의 동작 상태를 모니터링하기 위한 제2비교기; 및
상기 밸브 전원공급 FET와 상기 밸브 구동 FET의 온오프 상태와 상기 제1비교기와 상기 제2비교기로부터 출력되는 각각의 로직신호에 따라 상기 밸브 전원공급 FET와 상기 밸브 구동 FET의 동작상태와 불량 여부를 판정하는 MCU;
를 포함하는 것을 특징으로 하는 차량용 자세 제어 시스템의 밸브 모니터링 장치.
A valve power supply FET for supplying battery power according to the output signal of the charge pump IC;
A valve driving FET for driving in accordance with the vehicle attitude control signal;
A solenoid coil connected to one side of the valve power supply FET and the other side of the valve driving FET;
A first comparator for monitoring an operating state of the valve power supply FET;
A second comparator for monitoring an operating state of the valve drive FET; And
According to the on / off state of the valve power supply FET and the valve drive FET and the respective logic signals output from the first comparator and the second comparator, the operation state of the valve power supply FET and the valve drive FET and whether the valves MCU to determine;
Valve monitoring apparatus for a vehicle attitude control system comprising a.
제 1 항에 있어서,
상기 밸브 전원공급 FET와 상기 솔레노이드 코일이 연결된 노드로 내부전원을 공급하는 내부전원을 연결시켜 구성한 것을 특징으로 하는 차량용 자세 제어 시스템의 밸브 모니터링 장치.
The method of claim 1,
Valve monitoring apparatus for a vehicle attitude control system, characterized in that configured to connect the internal power supply for supplying internal power to the node connected to the valve power supply FET and the solenoid coil.
제 2 항에 있어서, 상기 제1비교기는
상기 밸브 전원공급 FET의 드레인단 전압과 소스단 전압을 비교하여 제1로직신호를 상기 MCU로 출력하도록 구성한 것을 특징으로 하는 차량용 자세 제어 시스템의 밸브 모니터링 장치.
The method of claim 2, wherein the first comparator
And a drain terminal voltage and a source terminal voltage of the valve power supply FET are configured to output a first logic signal to the MCU.
제 3 항에 있어서, 상기 제2비교기는
상기 밸브 전원공급 FET의 소스단 전압과 고정전압을 비교하여 제2로직신호를 상기 MCU로 출력하도록 구성한 것을 특징으로 하는 차량용 자세 제어 시스템의 밸브 모니터링 장치.

The method of claim 3, wherein the second comparator
And a source voltage and a fixed voltage of the valve power supply FET are configured to output a second logic signal to the MCU.

KR1020110069058A 2011-07-12 2011-07-12 Apparatus for monitoring valve of electronic stability control system in vehicle KR101854123B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050114797A (en) * 2004-06-01 2005-12-07 주식회사 만도 A vehicle having a preventing apparatus of a leakage current
KR20090010721A (en) * 2007-07-24 2009-01-30 주식회사 만도 Error detection method of solenoid valve
KR20110071561A (en) * 2009-12-21 2011-06-29 현대모비스 주식회사 Apparatus for detecting fail of a mcu of a vehicle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050114797A (en) * 2004-06-01 2005-12-07 주식회사 만도 A vehicle having a preventing apparatus of a leakage current
KR20090010721A (en) * 2007-07-24 2009-01-30 주식회사 만도 Error detection method of solenoid valve
KR20110071561A (en) * 2009-12-21 2011-06-29 현대모비스 주식회사 Apparatus for detecting fail of a mcu of a vehicle

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